JPWO2021008056A5 - - Google Patents

Description

TECHNICAL FIELD The present application relates to the field of communication, and more particularly to a sidelink data transmission method, a terminal device and a network device.

In V2X (Vehicle to Everything) of NR (New Radio), the network allocates a sidelink configuration permission transmission resource for the terminal on the transmission side, and the terminal on the transmission side sends a side link to the terminal on the reception side on the configuration permission transmission resource. Link data is transmitted, and the receiving terminal can feed back an acknowledgment (ACK) or a negative acknowledgment (NACK) to the transmitting terminal based on the detection result. When the terminal on the transmitting side receives a NACK, it is necessary to retransmit the sidelink data, but how the terminal on the transmitting side retransmits the data at this time is an unsolved problem.

Embodiments of the present application provide a sidelink data transmission method, a terminal device and a network device that can improve data transmission efficiency.

A first aspect provides a method for transmitting sidelink data, wherein a first terminal device receives sidelink transmission resource indication information and first uplink transmission resource indication information configured by a network device; the first terminal device transmitting sidelink data to at least one second terminal device over the sidelink transmission resource; and the first terminal device transmitting sidelink data over the first uplink transmission resource to the network device. wherein the sidelink transmission resource indication information indicates a sidelink transmission resource, the first uplink transmission resource indication information indicates a first uplink transmission resource; The first feedback information is used to indicate whether the sidelink data is received correctly.

A second aspect provides a method for transmitting sidelink data, comprising: a network device transmitting sidelink transmission resource indication information to a terminal device, the sidelink transmission resource indication information specifying a sidelink transmission resource set; and a first sidelink transmission resource in the sidelink transmission resource set is used by the first terminal device to transmit sidelink data to at least one second terminal device; A second sidelink transmission resource in a set allows the first terminal device to transmit the sidelink data to the at least one second terminal device if the first terminal device determines that the sidelink data is not received correctly. Used to resend link data.

A third aspect provides a terminal device for performing the method of any of the first aspect, or each implementation thereof, described above. Specifically, this terminal device comprises a functional module for performing the method in the above-described first aspect or each embodiment thereof.

A fourth aspect provides a network device for performing the method of any of the second aspects described above, or each implementation thereof. Specifically, this network device comprises a functional module for performing the method of the second aspect, or each embodiment thereof, described above.

According to the above technical solution, the terminal device receives the sidelink transmission resources allocated from the network device for only performing new data transmission of the sidelink data, and furthermore, the sidelink data configured by the network device at the same time receiving the sidelink transmission resource of the sidelink data feedback information transmitted by the network device, and feeding back the sidelink data transmission status to the network device, the network device confirming that the terminal device is It can be realized by dynamically allocating retransmission resources when retransmission is required, which can improve resource utilization, and all sidelink transmission resources are allocated by network devices, thus reducing interference. be able to.

Alternatively, the sidelink transmission resources configured by the network device for the terminal device may be used by the terminal device for the initial transmission or retransmission of the sidelink data, and on the sidelink transmission resources configured by the terminal device. By autonomously selecting resources for initial transmissions and retransmissions in , signaling overhead with network devices can be reduced.

Alternatively, the network device uses the sidelink transmission resource configured for the terminal device for the initial transmission of the sidelink data, and if a retransmission is required, the terminal device selects the transmission for the retransmission data in the resource pool. Since resources can be obtained by listening, etc., i.e., the initial transmission of sidelink data uses transmission resources allocated by the network device, and retransmissions use transmission resources independently selected by the terminal device, the network It can also reduce the signaling overhead between the terminal device and the network device, because the device does not have to consider retransmissions but only the first transmission when configuring the sidelink transmission resources.

1 is a schematic diagram of architecture of a communication system in an embodiment of the present application; FIG. FIG. 2 is a schematic diagram of two transmission modes of a vehicle network in an embodiment of the present application; 1 is a schematic diagram of data transmission between any two vehicles in an embodiment of the present application; FIG. FIG. 4 is a schematic diagram of a method for transmitting sidelink data in an embodiment of the present application; FIG. 4 is a schematic diagram of time slots occupied by sidelink data and feedback information in an embodiment of the present application; FIG. 4 is another schematic diagram of time slots occupied by sidelink data and feedback information in an embodiment of the present application; FIG. 4 is a schematic diagram of different feedback channel formats in embodiments of the present application; FIG. 4 is a schematic diagram of multicast communication in an embodiment of the present application; FIG. 4 is a schematic diagram of time-frequency locations of different transmission resources in an embodiment of the present application; 3 is another flow chart of a method for transmitting sidelink data according to an embodiment of the present application; FIG. 4 is a flow chart of another method for transmitting sidelink data according to an embodiment of the present application; FIG. FIG. 4 is another flow chart of another method for transmitting sidelink data according to an embodiment of the present application; FIG. FIG. 4 is a schematic diagram of sidelink data transmission in an embodiment of the present application; FIG. 4 is a flow chart of another method for transmitting sidelink data according to an embodiment of the present application; FIG. FIG. 4 is another flow chart of another method for transmitting sidelink data according to an embodiment of the present application; FIG. FIG. 4 is another schematic diagram of sidelink data transmission in an embodiment of the present application; FIG. 4 is a block diagram of a terminal device in an embodiment of the present application; 1 is a block diagram of a network device in an embodiment of the present application; FIG. 1 is a block diagram of a communication device in an embodiment of the present application; FIG. 1 is a block diagram of a chip in an embodiment of the present application; FIG. 1 is a schematic diagram of a communication system in an embodiment of the present application; FIG.

Hereinafter, the technical solutions in the embodiments of the present application will be described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. . Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without inventive efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application are applicable to, for example, the Global System of Mobile communication system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (Wideband Code Division Multiple Access) system, WCDMA system, general packet General Packet Radio Service (GPRS), LTE system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System , mobile communication systems (Worldwide Interoperability for Microwave Access, WiMAX) or 5G systems.

As an example, FIG. 1 shows a communication system 100 to which embodiments of the present application may be applied. Communication system 100 may include network device 110, which may be a device that communicates with terminal device 120 (also called a communication terminal, terminal). . A network device 110 can provide communication coverage for a particular geographic area and can communicate with terminal devices located within the coverage area. Optionally, the network device 110 is a base station (Base Transceiver Station, BTS) in a GSM or CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB, in an LTE system). or eNodeB), or a radio controller in a Cloud Radio Access Network (CRAN), or a mobile switching hub, relay station, access point, in-vehicle device, wearable device, hub, switch, bridge, It may be a router, a network-side device in a 5G network, or a network device in a future evolving Public Land Mobile Network (PLMN).

Communication system 100 further includes at least one terminal device 120 located within the coverage of network device 110 . . As used herein, "terminal device" includes wired lines such as Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connections. and/or another data connection/network and/or a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM- It includes a wireless interface such as an FM broadcast receiver and/or means for another terminal device adapted to receive/transmit communication signals and/or Internet of Things (IoT) equipment. A terminal device configured to communicate over a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular telephones, Personal Communications System (PCS) terminals, PDAs, which can combine cellular radiotelephone with data processing, facsimile, and data communication capabilities. includes wireless telephones, pagers, Internet/intranet connections, web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers, as well as conventional notebook receivers and palmtop receivers. It may also be applied to a radiotelephone transmitter/receiver built in an electronic device such as a telephone. A terminal device can refer to an access terminal, user equipment (UE), user device, user station, mobile station, remote terminal, mobile equipment, user terminal, wireless communication equipment, user agent, or user equipment. The access terminal has cellular telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), and wireless communication capabilities. It can be a handheld device, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future developed PLMN, and the like.

Optionally, Device to Device (D2D) communication may occur between terminal devices 120 .

Optionally, a 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

FIG. 1 illustratively shows one network device and two terminal devices, and optionally the communication system 100 may include multiple network devices, with other numbers within the coverage of each network device. A terminal device may also be included, and embodiments of the present application are not limited thereto.

Optionally, the communication system 100 may further include other network entities such as network controllers, mobility management entities, etc., and embodiments of the present application are not limited thereto.

A device having a communication function in a network/system in the embodiments of the present application may also be called a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication devices include a network device 110 and a terminal device 120 having communication functions, and the network device 110 and the terminal device 120 are the specific devices described above. Also, the description thereof is omitted here, and the communication device may further include other devices in the communication system 100, such as other network entities such as network controllers, mobility management entities, etc., and the embodiments of the present application are limited thereto. not.

It is understood that the terms "system" and "network" are often used interchangeably herein. Here, "and/or" simply refers to a related relationship that describes related objects, and there are three relationships such as A and/or B, and if A is alone, both A and B , B alone. Also, "/" in the text generally indicates that context objects are in an "or" relationship.

D2D (Device to Device) is a side link SL (Side Link) transmission technology, and unlike the conventional mobile phone system that transmits and receives data via a base station, the vehicle network system enables direct terminal-to-terminal communication. method, it has high frequency efficiency and low transmission delay. 3GPP (3rd Generation Partnership Project) defines two transmission modes, “mode A” and “mode B”.

FIG. 2 is a schematic diagram of two transmission modes. As shown in FIG. 2, in mode A, the transmission resource of the terminal is allocated from the base station via DL (Down Link), and the terminal transmits sidelink data on the sidelink according to the resource allocated from the base station. The base station may allocate the terminal one-time transmission resources or semi-statically allocate transmission resources.

As shown in FIG. 2, Mode B means that the vehicle terminal selects resources from the resource pool to transmit sidelink data.

Since NR-V2X needs to support autonomous driving, there are high requirements for data interaction between vehicles such as higher throughput, low latency, high reliability, wide coverage, and flexible resource allocation. there is

In the NR-V2X system, multiple transmission modes are introduced, namely Mode 1 and Mode 2, where Mode 1 is the network assigning transmission resources to terminals (that is, corresponds to Mode A above), Mode 2 is The terminal selects the transmission resource (ie corresponds to Mode B above).

In NR-V2X, feedback channels are introduced in the sidelinks to increase transmission reliability. Specifically, FIG. 3 is a schematic diagram of data transmission between any two vehicles. As shown in FIG. 3, a vehicle UE1 and a vehicle UE2 form a unicast link, UE1 transmits sidelink data to UE2, and UE2 sends sidelink feedback information to UE1 based on the detection result of the received sidelink data. Send to This feedback information is used to indicate whether the sidelink data was received correctly by UE2, for example, the feedback information is a Hybrid Automatic Repeat reQuest (HARQ) ACK or NACK, and UE1 Receive feedback information from UE2 and decide whether to send retransmission of this data to UE2.

In 3GPP Rel-15, in order to reduce the transmission delay of uplink data, transmission of configured grant (or unlicensed transmission) is introduced, which mainly consists of the first type of configuration grant. -1 configured grant) and a second type configured grant (type-2 configured grant). The RRC signaling configuration includes time domain resources, frequency domain resources, demodulation reference signal DMRS (Demodulation Reference Signal), power control, modulation and coding scheme MCS (Modulation and Coding Scheme), All transmission resources and transmission parameters such as Waveform, Redundancy Version (RV), repetition count, frequency hopping, number of HARQ processes are included. Upon receiving the higher-layer parameters, the UE can immediately use the configured transmission parameters to perform physical uplink shared channel (PUSCH) transmission on the configured time-frequency resources.

Second type of configuration grant: a two-step resource configuration scheme is used, first, according to upper layer parameters (such as Configured GrantConfig), time-frequency resource period, open-loop power control, waveform, redundancy version, number of retransmissions, hopping frequency , configure transmission resources and transmission parameters such as the number of HARQ processes, and then activate PUSCH transmission of the second type of configuration permission by DCI (Downlink Control Information), at the same time, time domain resources, frequency domain resources. , DMRS, MCS and other transmission resources and transmission parameters. When the UE receives the upper layer parameter ConfiguredGrantConfig, the UE cannot immediately use the resources and parameters configured by this upper layer parameter to perform PUSCH transmission, but receives the corresponding DCI to transfer other resources and transmission parameters. should be activated and configured before PUSCH transmission. Also, the network can deactivate this configuration transmission via DCI, and when the terminal receives the deactivated DCI, it will not be able to use this transmission resource for transmission.

If the network allocates a configured-granted transmission resource to the terminal, when the terminal has uplink data to transmit, the terminal sends a Scheduling Request (SR)/ Without sending a buffer status report (BSR), transmission resources can be used directly for transmission, and delay can be shortened.

In NR-V2X, the network allocates a sidelink configuration permission transmission resource to the transmitting terminal, the transmitting terminal transmits sidelink data to the receiving terminal on this configuration permission transmission resource, and the receiving terminal The terminal can feed back ACK or NACK to the transmitting terminal based on the detection result. When the transmitting terminal receives a NACK, it needs to retransmit the data. At this time, the problem of how the transmitting terminal retransmits the data remains unsolved. For example, can the transmitting terminal report a NACK to the network to request retransmission resources, or does the terminal itself perform retransmissions? If the sending terminal reports a NACK to the network, how to get the resources to send the NACK to the network?

Therefore, embodiments of the present application provide a sidelink data transmission method that can solve the above problems.

FIG. 4 is a flowchart of a method 200 for transmitting sidelink data in accordance with an embodiment of the present application. As shown in FIG. 4, the method 200 includes S210, transmitting sidelink transmission resource indication information and first uplink transmission resource indication information, that is, if the first terminal device is configured by the network device receiving sidelink transmission resource indication information and first uplink transmission resource indication information, the sidelink transmission resource indication information indicating sidelink transmission resources, and the first uplink transmission resource indication information indicating the first uplink transmission resource; Indicates link transmission resources.

Note that the network device in the method 200 may be any network device, such as the network device shown in FIG. 1, and the first terminal device in the method 200 may be any terminal device. There may be, for example, the terminal device shown in FIG. 1, the first terminal device being the sender in the sidelink data transmission process. For ease of distinction, as shown in FIG. 2, the second terminal device is the receiving side in the sidelink data transmission process. Here, it is assumed that there are one or more terminal devices on the receiving side of sidelink data. For example, in a unicast transmission process, one terminal device on the transmitting side corresponds to one terminal device on the receiving side, and multicast transmission In the process, one transmitting terminal device corresponds to a plurality of receiving terminal devices, so the second terminal device may be any receiving terminal device, or the second terminal device may be any receiving terminal device. The terminal device may be a plurality of receiving terminal devices, but embodiments of the present application are not limited thereto.

In an embodiment of the present application, the network device sends sidelink transmission resource indication information to the first terminal device, the sidelink transmission resource indication information indicates the sidelink transmission resource, and the sidelink transmission resource is the first It is used for data transmission between a terminal device and a second terminal device, eg for transmission of at least one of a sidelink data channel, a sidelink control channel and a sidelink feedback channel. Specifically, the sidelink transmission resources may be configured in a dynamic configuration manner or in a semi-static manner.

For example, the first terminal device receiving sidelink transmission resource indication information configured by a network device means that the first terminal device receives configuration permission information transmitted by the network device, The grant information includes the sidelink transmission resource indication information. Specifically, the sidelink transmission resource is configured with configuration permission information, the sidelink transmission resource is a sidelink configuration permission transmission resource, and in this configuration permission method, the sidelink configuration permission transmission resource is the first or a second type (type-2) configuration grant transmission resource of type (type-1), wherein the type-1 configuration grant is configured by RRC signaling, RRC signaling is configuration grant transmission resource and including transmission parameters, the type-2 configuration grant is first configured by RRC signaling, which constitutes part of the transmission parameters of the configuration grant, is activated or deactivated by DCI signaling, and is activated or deactivated by DCI signaling. also includes configuration permission transmission resources and some transmission parameters. It should be noted that regardless of which resource allocation scheme, in the embodiments of the present application, the sidelink transmission resource indication information transmitted by the network device includes parameter information of the sidelink data channel, parameter information of the sidelink control channel, parameter information of the sidelink feedback channel, and second uplink transmission resource indication information. Each type of parameter is described in detail below.

Parameter information of a sidelink data channel (e.g., Physical Sidelink Shared Channel (PSSCH)) includes time domain resource parameters of the sidelink data channel, frequency domain resource parameters of the sidelink data channel, DMRS, Transmission method, number of transmission layers, MCS, maximum number of transmissions, redundancy version information, number of HARQ processes, power control information, size of sidelink data, identification information of terminal device receiving sidelink data, priority information, delay information , Code Block Group (CBG) feedback indication, whether the sidelink data channel contains Channel State information (CSI) Reference Signal (RS), time of the CSI-RS At least one of a domain resource parameter, a frequency domain resource parameter of the CSI-RS, and CSI feedback indication information.

Specifically, the time-domain resource parameter of the sidelink data channel includes period information of the sidelink data channel, time slot information (for example, time slot index, or offset for system frame number (SFN) #0, each At least one of the time domain symbol information occupied in the timeslot is included.

The frequency domain resource parameter of the sidelink data channel specifies at least one of the starting frequency domain position of the sidelink data channel, the size of the frequency domain occupied, and the size of the minimum frequency domain unit occupied by the sidelink data channel. For example, a subband is the minimum frequency domain unit, and one subband includes 4, 8, or 10 physical resource blocks (PRBs).

The DMRS of the sidelink data channel includes at least one of a DMRS pattern, scrambling ID information of the DMRS sequence, the number of time-domain symbols occupied by the DMRS, and the time-domain symbol position occupied by the DMRS. If DMRS of the sidelink data channel supports at least one pattern in the time domain, sidelink transmission resource indication information or configuration grant information can indicate the use of a certain DMRS pattern.

The sidelink data channel transmission scheme may include at least one of single port transmission, Space Frequency Block Code (SFBC), Cyclic Delay Diversity (CDD), and precoder cycling. If the sidelink supports at least one transmission scheme, the network device may specify the use of a transmission scheme in the sidelink transmission resource indication message or configuration grant information.

The number of transmission layers of the sidelink data channel may be one layer transmission, divided into two layer transmissions, or other multi-layer transmissions.

MCS contains the MCS level used for sidelink data.

Also called maximum number of transmissions, or number of repetitions, it can be used to indicate the maximum number of transmissions per sidelink packet (i.e., one transmission block TB), which can include, for example, the first transmission and retransmissions. can.

Redundancy version (RV) information may include redundancy version information corresponding to each transmission if the sidelink data channel includes multiple transmissions. For example, the redundancy version order is [0 2 3 1], corresponding to 4 transmissions (1 initial transmission and 3 retransmissions), and if the number of data transmissions is greater than 4, then , the verbose version above is used repeatedly.

The number of HARQ processes may be the number of HARQ processes supported by the sidelink data channel.

The power control information may indicate that the sidelink data channel is power controlled based on the downlink load loss or based on the sidelink load loss, or the power control information may indicate that the sidelink control channel and It may indicate power deviation, or power spectral density deviation, of the sidelink data channel.

The size of the sidelink data may be the size of the transmission block of the sidelink data.

The identification information of the terminal device that receives the sidelink data is the destination identifier information, and the destination identifier of the sidelink data. Alternatively, it may be an index of a destination to communicate with V2X.

Priority information: Only sidelink data or services with corresponding priority can be transmitted by the sidelink transmission resources indicated by the sidelink transmission resource indication information, or sidelinks with priority higher than the priority information can be transmitted. Link data and services can be transmitted on the sidelink transmission resources indicated by the sidelink transmission resource indication information. For example, the priority is represented by PPPP (Prose Per Packet Priority) of the adjacent service, and the value range is [0, 7], and the smaller the PPPP value, the higher the priority. Taking the example of a network device sending a configuration permission to a terminal device, if the priority information configured by the network device is 3, only sidelink data with a priority PPPP of 3 is transmitted in this configuration permission resource. possible or higher priority, ie sidelink data with priority PPPP of 0, 1, 2, 3 can be transmitted on this configuration grant resource.

Delay information: Only the sidelink data or service for which the delay information is transmitted on the sidelink transmission resource configured by the network device, or the sidelink data or service whose delay request is greater than or equal to the delay information is transmitted on the sidelink transmission resource. transmitted in For example, taking the network device sending a configuration permission to the terminal device as an example, if the delay information of the configuration permission sent by the network device is 10 ms, that is, the side link service with a delay request of 10 ms, or the delay request Only sidelink services with higher (eg 3ms, 5ms) are transmitted on the configured grant resource.

The CBG feedback indication information indicates whether the sidelink data supports CBG-based feedback. For example, if the indication information is 1, it indicates to support CBG-based feedback, i.e., the second terminal device on the receiving side of sidelink data feeds back HARQ ACK or NACK for each CBG. if the indication information is 0, it indicates not supporting CBG-based feedback, i.e., the second terminal device feeds back HARQ ACK or NACK to the entire transmission block (TB); do.

The CSI-RS information includes at least one of whether the CSI-RS is included in the sidelink data channel, CSI-RS time domain resources, and CSI-RS frequency domain resources. For example, the sidelink data channel includes CSI-RS, the receiving second terminal device is used to make channel measurements, the sidelink transmission resource indication information from the network includes CSI-RS in the sidelink data, Include indication information indicating whether an RS signal is included. Also, for example, the sidelink transmission resource indication information further includes information indicating the time domain symbol occupied by the CSI-RS. Also, for example, the CSI-RS frequency domain resource information includes CSI-RS frequency domain offset information and/or frequency domain resource size. For example, if comb-like transmission is used for CSI-RS, i.e., every m subcarriers contains subcarriers for transmitting CSI-RS, the frequency domain offset information is stored in one resource block. In (Resource Block, RB), the subcarrier of the first transmitted CSI-RS indicates an offset relative to subcarrier 0, and the frequency domain resource information can include a parameter m.

The CSI feedback indication information indicates whether the receiving second terminal device needs to feed back channel state information, such as Channel Quality Indicator (CQI), Rank Indicator, RI), sidelink reference signal received power (S-RSRP), and the like.

Parameter information of the sidelink control channel (for example, physical sidelink control channel (Physical Sidelink Control Channel, PSCCH)) is the time domain resource parameter of the sidelink control channel, the frequency domain resource parameter of the sidelink control channel At least one.

Specifically, the time-domain resource of the sidelink control channel includes at least one of the period of the sidelink control channel, the starting position of the time-domain symbol in each time slot, and the number of occupied time-domain symbols.

The frequency domain resource of the sidelink control channel is at least one of the frequency domain start position of the sidelink control channel, the frequency domain resource size occupied by each sidelink control channel, and the minimum frequency domain resource granularity size of the sidelink control channel. For example, the smallest frequency domain resource granularity is subband, and each subband contains 4, 8, 10 PRBs.

The parameter information of the sidelink feedback channel (for example, the physical sidelink feedback channel PSFCH (Physical Sidelink Feedback Channel)) is the time offset of the sidelink feedback channel with respect to the sidelink data channel or the sidelink control channel, the sidelink feedback channel at least one of a time slot parameter, a frequency domain resource parameter of the sidelink feedback channel, whether sidelink feedback is enabled, a feedback scheme of the sidelink feedback channel, and a format of the sidelink feedback channel. Here, the sidelink feedback channel is used by the second terminal device to feed back the sidelink data reception status to the first terminal device.

Specifically, the sidelink feedback channel timeslot parameter includes the timeslot position of the sidelink feedback channel, e.g. Contains the time offset of the sidelink feedback channel. For example, the network device configures the time offsets of the sidelink feedback channel and the corresponding sidelink data channel for the first terminal device and the second terminal device, eg, offset K =1 and the first terminal device indicates to transmit sidelink data in timeslot n, then the second terminal device transmits feedback information for the sidelink data in timeslot n+1. Also, for example, if one time slot out of every k time slots is used to transmit the transmission resource of the feedback channel, the network device configures the parameter k, for example, as shown in FIG. The slot offset parameter k=4.

The frequency-domain resource parameter of the sidelink feedback channel allows a network device to determine the frequency-domain starting position and/or size (or length) of the frequency-domain resource of the sidelink feedback channel for the first terminal device and the second terminal device. ). Optionally, the frequency-domain starting position of the sidelink feedback channel and the frequency-domain starting position of the PSCCH or PSSCH may be the same or different. Optionally, the frequency domain length of the sidelink feedback channel may be preconfigured or configured by a network device.

The format of the sidelink feedback channel may be of one or more types, for example, in NR-V2X, two types of sidelink feedback channels are considered: short feedback channel and long feedback channel. In that case, the network device can specify that the format of the feedback channel is a short feedback channel or a long feedback channel. Here, the short feedback channel usually occupies several time-domain symbols, for example, as shown in FIG. It is located in the time domain symbol before the Guard period (GP) symbol. The long feedback channel occupies all time-domain symbols normally used for sidelink transmission in one timeslot, or the long feedback channel is used for sidelink transmissions other than the guard interval in one timeslot. For example, as shown in FIG. 7, the first symbol of one time slot is used as Automatic Gain Control (AGC), and the last symbol is GP , the long feedback channel occupies all other symbols in one timeslot except these two symbols, or feedback information is also mapped to AGC symbols.

Whether sidelink feedback is effective is whether sidelink feedback (enable/disable) is supported. For the sidelink data, if the second terminal device sends feedback information or does not send feedback information and the network device configuration supports sidelink feedback, the second terminal device sidelinks the first terminal device. Send link feedback information, otherwise the second terminal device does not send sidelink feedback information.

The feedback scheme of the sidelink feedback channel is generally of two types, the first scheme is to feed back NACK only, the second scheme is to feed back ACK/NACK, and the network device can select either the first scheme or the second scheme. Feedback can be provided using two methods. Specifically, in the case of the first scheme, if the first terminal device and the second terminal device satisfy the threshold, if the second terminal device does not receive the sidelink data correctly, the If feedback information is sent to a first terminal device and the feedback information is a NACK and the second terminal device correctly receives the sidelink data, then no feedback information is sent to the first terminal device. However, if the first terminal device and the second terminal device do not meet the threshold, the second terminal device does not send feedback information to the first terminal device. if the threshold is met, the detection result of the second terminal device is NACK, feed back the NACK; if the second terminal device detection result is ACK, do not send feedback information, and if the threshold is not met; , the second terminal device does not transmit feedback information.

Here, the threshold is configured or pre-configured by the network device, eg defined in a protocol or determined according to Quality of Service (QoS) parameters.

The threshold may be a distance threshold, determining whether the distance between the first terminal device and the second terminal device satisfies the distance threshold, e.g. If the distance to the terminal device is less than or equal to the distance threshold, indicating that the distance between the first terminal device and the second terminal device meets the distance threshold, otherwise it does not meet. Similarly, the threshold may be another parameter, such as a Reference Signal Received Power (RSRP) value, and embodiments of the present application are not limited thereto.

As a second scheme, the at least one second terminal device transmits feedback information to the first terminal device based on whether the sidelink data is correctly received, and the feedback information is ACK or NACK is. If the detection result of the second terminal device is NACK, feed back NACK; if the detection result of the second terminal device is ACK, feed back ACK.

For example, FIG. 8 shows a schematic diagram of an arbitrary communication group. As shown in FIG. 8, the largest circle contains 7 UEs, when UE1 transmits data and UE2-UE7 receive data, the first scheme is used to feedback and receive When the distance between each terminal device of the side UE2 to UE7 and the transmitting side UE1 is within a certain range, for example, for three terminal devices UE2, UE3 and UE4 inside the dotted line, the distance between each terminal device and UE1 is When the distance is within a predetermined range, the three terminal devices will feed back according to the sidelink data reception status, i.e., if received correctly, do not feed back information; if not received correctly, send to UE1 Feed back NACK. None of UE5, UE6 and UE7 send feedback information for terminal devices that are out of the predetermined range. Feedback is performed using the second method, and all receiving sides (UE2-UE7) in the communication group send feedback information according to the detection state, and if the sidelink data is correctly received, to UE1 ACK is fed back, and if not received correctly, NACK is fed back to UE1.

In an embodiment of the present application, if the network device allocates sidelink transmission resources used for transmitting sidelink data to the first terminal device, and the first terminal device does not send acknowledgment information to the network device, the network device does not know whether the first terminal device correctly receives the sidelink transmission resource indication information, and the first terminal device transmits sidelink data only on the sidelink, the network device detects the status of the sidelink. Because it does not know whether the sidelink transmission resource indication information is correctly received by the first terminal device, in this case, the first terminal device needs to send confirmation information to the network.

Specifically, the sidelink transmission resource indication information sent by the network device further includes second uplink transmission resource indication information, wherein the second uplink transmission resource indication information is the first A terminal device is used to determine a second uplink transmission resource, which the first terminal device provides feedback information for the sidelink transmission resource indication information to the network device. used to send.

For example, the network device allocates Physical Uplink Control Channel (PUCCH) transmission resources or allocates PUSCH transmission resources for the first terminal device, where the first terminal device Feedback information of sidelink transmission resource indication information can be transmitted on PUCCH or PUSCH.

Optionally, implying that the first terminal device needs to send confirmation information to the network when a network device allocates the second uplink transmission resource indication information for the first terminal device. explicitly instructing the first terminal device to send feedback information to the network device at this time, without the need for the first terminal device to explicitly instruct the network device to send the feedback information to the network device; If no link transmission resource indication information is allocated, there is no need for the first terminal device to send feedback information to the network device. For example, if the sidelink transmission resource indication information includes the second uplink transmission resource indication information, the first terminal device performs a second uplink transmission in response to the second uplink transmission resource indication information. determining resources and transmitting feedback information of the sidelink transmission resource indication information to the network device on the second uplink transmission resource, wherein the sidelink transmission resource indication information feedback information is transmitted to the first terminal device; receives the sidelink transmission resource indication information correctly. Conversely, if the sidelink transmission resource indication information does not include the second uplink transmission resource indication information, the first terminal device needs to send feedback information to the network device for the sidelink transmission resource indication information. no, eg, setting the second uplink resource indication information to a certain value to indicate that no feedback information needs to be sent to the network device.

In an embodiment of the present application, the network device sends first uplink transmission resource indication information to the first terminal device, the first uplink transmission resource indication information indicates the first uplink transmission resource, which A first terminal device transmits first feedback information to a network device on the first uplink transmission resource, the first feedback information indicating whether sidelink data is correctly received or not. .

Specifically, the first uplink transmission resource indication information includes period information of the first uplink transmission resource, location information of the time slot in which the first uplink transmission resource is located, and the time slot within the time slot. location information of time-domain symbols occupied by the first uplink transmission resource, information on the number of time-domain symbols occupied by the first uplink transmission resource in a time slot, frequency of the first uplink transmission resource including at least one of region information;

The periodicity information of the first uplink transmission resource is used by the first terminal device to determine the periodicity of the first uplink transmission resource. Optionally, the sidelink transmission resources allocated by the network device for the first terminal device are typically a plurality of sidelink transmission resources with periodicity, and for each sidelink transmission resource a corresponding first , wherein the periodic size of the first uplink transmission resource and the sidelink transmission resource may be set to be the same.

The location information of the time slot in which the first uplink transmission resource is located indicates the time slot in which the first uplink transmission resource is located. For example, the location information is the time slot offset for the SFN#0 System Frame Number, or the time slot offset for the PSCCH, PSSCH or Physical Sidelink Feedback Channel (PSFCH). is.

Optionally, the first uplink transmission resource indication information is used to determine location information of the time slot in which the first uplink transmission resource is located, specifically determined in the following manner: the terminal receives sidelink transmission resource indication information from the network, the sidelink transmission resource indication information includes the first uplink transmission resource indication information, the terminal receives the sidelink transmission resource indication information and the first determining a time domain location of the first uplink transmission resource according to a piece of uplink transmission resource indication information;

Specifically, the first uplink transmission resource indication information may be time interval indication information, for example, the time intervals indicated by the time interval indication information may be sidelink transmission resource indication information or sidelink transmission resources. is the relevant time interval. Therefore, the terminal device can determine the time domain location of the first uplink transmission resource based on the time interval indication information and the sidelink transmission resource indication information, e.g. can determine the location information of the time slot in which the is located.

For example, for the allocation scheme of dynamically scheduled sidelink transmission resources, that is, the sidelink transmission resource indication information in the embodiments of the present application is configured with dynamic scheduling, the network allocates sidelink transmission resources with DCI, In addition, the DCI indicates the PUCCH transmission resource, and the PUCCH is used by the terminal to report sidelink feedback information to the network, that is, the PUCCH transmission resource is the first uplink transmission resource in the present application. is. Specifically, the DCI includes time interval indication information, which indicates the time interval between the PUCCH time domain resource and the DCI time domain resource. Therefore, the terminal can determine the time domain location of the first uplink transmission resource based on the time of reception of the DCI and the time interval indication information, i.e. determine the time domain location of the PUCCH. be able to.

Also, for example, the network allocates a second type of sidelink configuration permission for the terminal, that is, the sidelink transmission resource indication information in the embodiments of the present application is configured in the second type of sidelink configuration permission method. , the sidelink configuration grant configures sidelink transmission resources in a combined manner of RRC signaling and DCI signaling, and the second type of sidelink configuration grant is activated or deactivated in DCI. At this time, the DCI and/or RRC include time interval indication information, the time interval indication information indicates the time interval between the PUCCH time domain resource and the DCI time domain resource, that is, the PUCCH transmission resource is , is the first uplink transmission resource in this application. The terminal can determine the time domain location of the first uplink transmission resource based on the time of reception of the DCI and the time interval indication information, i.e. determine the time domain resource of the first PUCCH. be able to. In addition, the sidelink configuration grant is a periodic transmission resource, that is, the network configures the periodic sidelink transmission resource for the terminal, so that each sidelink transmission resource period has a corresponding PUCCH transmission resource. In this case, the terminal can determine respective corresponding uplink transmission resources in subsequent sidelink transmission periods based on the time domain position within the period in which the first PUCCH time domain resource is located. For example, the terminal receives DCI in time slot n and is used to activate the sidelink configuration permission, the time interval indication information contained in the DCI is 10 time slots, and the period is 100 times. slot, the terminal determines that the period of the sidelink transmission resource is [n+1, n+100], [n+101, n+200], [n+201, n+300], and so on. The terminal determines that the time slot of the first uplink transmission resource is n+10, because the period of the sidelink transmission resource is 100 time slots, so that the PUCCH transmission resource in each period is 100 timeslots apart, i.e. within the following sidelink transmission resource period, the PUCCHs are located in timeslots n+110 and n+210 respectively, and so on.

Also, for example, the network allocates a first type sidelink configuration permission for the terminal, that is, the sidelink transmission resource indication information in the embodiments of the present application is configured according to the first type sidelink configuration permission method. and the sidelink configuration grant configures sidelink transmission resources with RRC signaling. The RRC includes time interval indication information, and the terminal can determine the time domain resource of the first uplink transmission resource based on the time interval indication information, for example, where the first uplink transmission resource is located. Time slot location information can be determined. For example, the RRC signaling includes time slot offset indication information, the time slot offset indication information is used to determine the starting position of the sidelink transmission period, the RRC signaling further includes time interval indication information, and the The time interval indication information indicates the time interval of the first uplink transmission resource with respect to the sidelink transmission cycle start position. Therefore, the terminal determines the time domain location of the first uplink transmission resource based on the time interval indication information and the start location of the sidelink transmission period. In addition, the sidelink configuration grant is a periodic transmission resource, ie the network configures a periodic sidelink transmission resource for the terminal, and there is an uplink transmission resource corresponding to each sidelink transmission resource period. For example, the first time interval information included in RRC signaling is 100 time slots, the first time interval information is used to determine the starting position of the sidelink transmission resource period, and the time region When the offset information is for SFN#0 and the period information indicated by RRC signaling is 200 time slots, the period of the sidelink transmission resource is time slots [100, 299], [300, 499], [500, 699], respectively, and so on. The second time interval indication information included in the RRC signaling is 20, the second time interval indication information is used to determine the PUCCH time domain resource, and the terminal indicates that the PUCCH in each period is Timeslot: determined to be located at 120, 320, 520 respectively, and so on.

The location information of the time-domain symbol occupied by the first uplink transmission resource in the time slot specifically indicates the location of the symbol occupied in the time slot in which the first uplink transmission resource is located, for example, the The position information includes the start position or end position of the time-domain symbol within the timeslot of the first uplink transmission resource.

The information of the number of time-domain symbols occupied by the first uplink transmission resource in a timeslot indicates the number of time-domain symbols occupied by the first uplink transmission resource in one timeslot.

Optionally, the time-domain symbol starting position information and the information of the number of time-domain symbols of the first uplink transmission resource are indicated by one or more parameters, and the parameters determine the time-domain symbol starting positions, and , the number of time-domain symbols to be occupied can be determined, and embodiments of the present application are not limited thereto.

The frequency domain information of the first uplink transmission resource is used to determine a frequency domain resource starting position and a frequency domain resource length of the first uplink transmission resource. Optionally, the frequency domain resource starting position and the frequency domain resource length may be determined by one parameter or indicated by two independent parameters respectively.

FIG. 9 shows a schematic diagram of the time-frequency locations of different transmission resources, as shown in FIG. 9, the network device configures the sidelink transmission resources to the first terminal device, which is used to transmit the sidelink data. For example, the sidelink transmission resource includes the sidelink data transmission resource shown in FIG. 9, which is used by the first terminal device to transmit to the second terminal device on the sidelink data channel or the sidelink control channel. and the sidelink transmission resources configured by the network device further include the transmission resources of the sidelink feedback channel shown in FIG. 9, wherein the second terminal device feeds back the reception status of the sidelink data to the first terminal device and the network device allocates a first uplink transmission resource for the first terminal device, i.e., the uplink feedback channel transmission resource in FIG. 9 is the transmission resource for each sidelink data , by which the first terminal device feeds back the reception status of the sidelink data to the network device. As shown in FIG. 9, the time-frequency locations of the three sets of transmission resources have a one-to-one correspondence, but embodiments of the present application are not limited thereto.

In addition, the network device sending the first uplink transmission resource indication information to the first terminal device means that the network device sends configuration permission information to the first terminal device, and the configuration permission information is transmitted to the first terminal device. including 1 uplink transmission resource indication information.

Optionally, the sidelink transmission resource indication information and the first uplink transmission resource indication information sent by the network device to the first terminal device may be in the same configuration permission information, i.e. the network device sends configuration permission information to the first terminal device, the configuration permission information including the sidelink transmission resource indication information and the first uplink transmission resource indication information.

Optionally, the sidelink transmission resource indication information and the first uplink transmission resource indication information sent by the network device to the first terminal device may be independent signaling, e.g. be. For example, the first terminal device receives first configuration permission information sent by the network device, the first configuration permission information includes the sidelink transmission resource indication information, and the first terminal device receives second configuration permission information sent by the network device, the second configuration permission information including the first uplink transmission resource indication information.

If the sidelink transmission resource indication information and the first uplink transmission resource indication information are independent signaling, there is an association relationship between them. For example, the related information is included in the first configuration permission information including the sidelink transmission resource indication information and/or the related information is included in the second configuration permission information including the first uplink transmission resource indication information. , wherein the related information indicates that the first uplink transmission resource indication information corresponds to the sidelink transmission resource indication information; Also, for example, the second configuration permission information or the first configuration permission information includes indication information, and the indication information indicates that the first terminal device is configured to use the first side on the first uplink transmission resource. Used to send first feedback information for link data.

Optionally, a network device may indicate that the first terminal device does not need to feed back sidelink data, in which case the network device tells the first terminal device to No need to allocate uplink transmission resources. For example, the network device may not send the first uplink transmission resource indication information to the first terminal device, and the first terminal device may need to feed back the sidelink data reception status to the network device. or the network device sends indication information to the first terminal device, and in the indication information the first terminal device feeds back the reception status of the sidelink data to the network device It indicates that there is no need, and the embodiments of the present application are not limited to this.

As shown in FIG. 4, the method 200 further includes S220, transmitting sidelink data on the sidelink transmission resources, i.e., the first terminal device transmits at least one second data on the sidelink transmission resources. Send sidelink data to the terminal device. Specifically, when sidelink data is transmitted to the first terminal device, for example, the sidelink data includes a sidelink data channel and/or a sidelink control channel, i.e., the sidelink data includes the PSCCH and/or or PSSCH, wherein the first terminal device selects a transmission resource from the sidelink transmission resources configured by the network device to transmit the sidelink data, and selects a transmission resource corresponding to the sidelink transmission resource indication information; and transmit the sidelink data according to the transmission parameters.

For example, the first terminal device transmits sidelink control information (SCI) to the at least one second terminal device on the sidelink transmission resource, and the sidelink control information is sidelink data Used for scheduling channels, the first terminal device may further transmit the sidelink data channel on the sidelink transmission resources.

Optionally, said sidelink control information further comprises at least one of HARQ process information, New Data Indication (NDI) information, and parameter information of said sidelink feedback channel, wherein: The Sidelink Feedback Channel is used to carry feedback information for the Sidelink Data Channel.

optionally, the first terminal device transmits sidelink data to the second terminal device on the sidelink transmission resource, e.g., transmits a sidelink control channel or a sidelink data channel to the second terminal device; The second terminal device may further feed back the reception status of the sidelink data to the first terminal device.

FIG. 10 shows another flowchart of method 200 in an embodiment of the present application, after S220, as shown in FIG. 10, the method 200 further includes S221, sending second sidelink feedback information; That is, the second terminal device transmits second feedback information to the first terminal device, whereby the first terminal device receives the second feedback information transmitted by the at least one second terminal device. Received, the second feedback information indicates whether the sidelink data is received correctly. For example, the second feedback information is ACK or NACK.

Optionally, the second terminal device may utilize sidelink transmission resources configured by a network device to transmit the second feedback information. A network device sends sidelink transmission resource indication information to a first terminal device, and the sidelink transmission resource indication information includes sidelink feedback channel parameter information, so that the first terminal device is the second terminal device. A second terminal device may transmit the sidelink feedback channel on the sidelink transmission resource by transmitting parameter information of the sidelink feedback channel to a device.

Optionally, the sidelink feedback channel parameter information transmitted by the first terminal device to the second terminal device is all of the sidelink feedback channel parameter information transmitted by the network device to the first terminal device, or Possible information included in the sidelink feedback channel parameter information transmitted by the first terminal device to the second terminal device may be part of the information transmitted by the network device to the first terminal device. It may be the same as the sidelink feedback channel parameter information and is omitted here for the sake of brevity.

For example, the sidelink feedback channel parameter information transmitted by the first terminal device to the second terminal device may cause the second terminal device to determine the sidelink feedback channel based on the sidelink feedback channel parameter information and the sidelink feedback channel. A link feedback channel is used to feed back the reception status of the sidelink data to the first terminal device, and the parameter information of the sidelink feedback channel is the sidelink feedback channel for the sidelink data channel or the sidelink control channel. time offset, timeslot parameter of the sidelink feedback channel, frequency domain resource parameter of the sidelink feedback channel, whether sidelink feedback is enabled, feedback scheme of the sidelink feedback channel, format of the sidelink feedback channel at least one of

A second terminal device transmits second feedback information to the first terminal device on a sidelink transmission resource, via the second feedback information, the first terminal device correctly receives the sidelink data. can decide whether or not Specifically, the plurality of second feedback information fed back by at least one second terminal device includes ACK or NACK, or by at least one second terminal device received by the first terminal device If all the transmitted second feedback information is NACK, the first terminal device determines that the sidelink data was not received correctly, i.e. the at least one second terminal device There is a second terminal device for which the sidelink data is not correctly received, and the second feedback information sent by the first terminal device from all second terminal devices of the at least one second terminal device is an ACK. If so, the first terminal device determines that the sidelink data is correctly received, i.e. neither of the at least one second terminal device correctly receives the sidelink data, and the first terminal device If the terminal device determines that the second feedback information transmitted by the at least one second terminal device has discontinuous transmission (DTX), it determines that the sidelink data was not received correctly. That is, there is a second terminal device for which the sidelink data is not correctly received by the at least one second terminal device.

As shown in FIG. 4 or FIG. 10, the method 200 further includes S230, transmitting the first feedback information on the first uplink transmission resource, i.e., the first terminal device receives the first transmitting first feedback information to the network device on a first uplink transmission resource indicated by uplink transmission resource indication information, the first feedback information indicating whether the sidelink data is correctly received; Used to direct.

Optionally, the first feedback information is determined based on second feedback information transmitted by the second terminal device received by the first terminal device. The first terminal device determines whether the sidelink data is correctly received based on the second feedback information, and if the sidelink data is not correctly received, the first terminal device , determines that the first feedback information indicates that the sidelink data is not received correctly, and if the sidelink data is received correctly, the first terminal device responds with the first feedback information. Decide to indicate that the sidelink data is correctly received, or the first terminal device does not send the first feedback information to the network device if the sidelink data is correctly received. Here, the first terminal device determines whether the sidelink data is correctly received based on the second feedback information according to S221.

Optionally, a network device receives said first feedback information transmitted by said first terminal device and thereby generates HARQ process information for said sidelink based on configured first uplink transmission resources. or the first terminal device may send HARQ process information for the sidelink to the network device.

Furthermore, the first terminal device transmitting the first feedback information to the network device on the first uplink transmission resource means that the first terminal device sends the first feedback information on the first uplink transmission resource. Sending a PUCCH or PUSCH to a network device, the PUCCH or PUSCH including the first feedback information. Specifically, the first uplink transmission resource indication information sent by the network device to the first terminal device is used by the first terminal device to determine the PUCCH transmission resource, and the first terminal device , transmits PUCCH to the network on the first uplink transmission resource, on which the first feedback information, eg, ACK or NACK, of the sidelink data is carried.

Optionally, if the first feedback information indicates that the sidelink data was not received correctly, the method 200 further comprises S240 and S250, as shown in FIG. sending indication information, i.e., a network device sending retransmission resource indication information to a first terminal device, the first terminal device receiving the retransmission resource indication information sent by the network device; The retransmission resource indication information indicates a retransmission resource, and in S250, retransmit sidelink data on the retransmission resource, i.e., the first terminal device transmits the sidelink data to the at least one second terminal device on the retransmission resource. Resend the data.

Optionally, the network device allocates retransmission resources to said first terminal device via dynamic signaling, e.g. DCI, i.e. said DCI includes said retransmission resource indication information and said first terminal device Used to retransmit sidelink data. Here, sidelink process information is included in the retransmission resource indication information or DCI, and the retransmission resources allocated in the retransmission resource indication information or DCI are used for retransmission in any HARQ process.

Optionally, if the first terminal device retransmits sidelink data on said retransmission resource, said first terminal device transmits SCI to said second terminal device and schedules a sidelink data channel on said SCI. . Here, the SCI includes HARQ process information and NDI indication information, indicating that the NDI does not rotate and is retransmitted.

Therefore, in the sidelink data transmission method in the embodiments of the present application, the sidelink transmission resource allocated by the network device to the terminal device is only used for the transmission of new sidelink data, and the sidelink transmission of the sidelink data While configuring the resource, configure a transmission resource for transmitting sidelink data feedback information for the terminal device, so that the terminal device feeds back the sidelink data transmission status to the network device, and the network device communicates with the terminal When a device needs to retransmit sidelink data, it can be implemented with dynamically allocated retransmission resources to improve resource utilization efficiency, and all sidelink transmission resources are allocated by network devices to reduce interference. can.

Embodiments of the present application further provide a method for transmitting sidelink data, wherein a network device allocates sidelink transmission resources for a terminal device, the terminal device transmits sidelink data on the sidelink transmission resources, If it is necessary to retransmit data, it selects a resource from the sidelink transmission resources and retransmits it.

Specifically, FIG. 11 is a flowchart of another sidelink data transmission method 300 according to an embodiment of the present application. As shown in FIG. 11, the method 300 includes S310, transmitting sidelink transmission resource indication information, a first terminal device receiving sidelink transmission resource indication information configured by a network device, Link transmission resource indication information indicates a sidelink transmission resource set.

Note that the network device in the method 300 may be any network device, such as the network device shown in FIG. 1, and the first terminal device in the method 300 may be any terminal device. There may be, for example, the terminal device shown in FIG. 1, the first terminal device being the sender in the sidelink data transmission process. For ease of distinction, as shown in FIG. 11, the second terminal device is the receiving side in the sidelink data transmission process. Here, it is assumed that there are one or more terminal devices on the receiving side of sidelink data. For example, in a unicast transmission process, one terminal device on the transmitting side corresponds to one terminal device on the receiving side, and multicast transmission In the process, one transmitting terminal device corresponds to a plurality of receiving terminal devices, so the second terminal device may be any receiving terminal device, or the second terminal device may be any receiving terminal device. The terminal device may be a plurality of receiving terminal devices, but embodiments of the present application are not limited thereto.

In an embodiment of the present application, the network device sends sidelink transmission resource indication information to the first terminal device, the sidelink transmission resource indication information indicates a sidelink transmission resource set, and the sidelink transmission resource set is indicated in the sidelink transmission resource set. The link transmission resource is used for data transmission between the first terminal device and the second terminal device, e.g., for transmission of at least one of a sidelink data channel, a sidelink control channel and a sidelink feedback channel. be. Specifically, the sidelink transmission resource sets may be dynamically configured or semi-statically configured.

Note that S310 of the method 300 corresponds to the network device sending sidelink transmission resource indication information to the first terminal device in S210 of the method 200 and is omitted here for brevity.

For example, the manner in which the network device transmits the sidelink transmission resource indication information and the parameters included in the sidelink transmission resource indication information may refer to the corresponding content in S210. For example, in S310, the sidelink transmission resource indication information is at least one of sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, and uplink transmission resource indication information. where the uplink transmission resource indication information corresponds to the second uplink transmission resource indication information of S210 in method 200 and is omitted here for brevity.

Here, for ease of distinction, the sidelink transmission resources indicated by the sidelink transmission resource indication information of the method 300 are referred to herein as a sidelink transmission resource set, and the sidelink transmission resources in the sidelink transmission resource set are: It is used for data transmission between a first terminal device and a second terminal device.

It should be noted that the difference between S310 of method 300 and S210 of method 200 is that the network device designates a first uplink transmission resource for transmitting sidelink feedback information to the network device for the first terminal device. Since there is no allocation, ie no transmission of the first uplink transmission resource indication information to the first terminal device, the first terminal device does not need to transmit sidelink feedback information to the network device.

As shown in FIG. 11, the method 300 further includes S320, transmitting sidelink data on a first sidelink transmission resource, i. Sidelink data is transmitted to at least one second terminal device on one sidelink transmission resource.

Note that S320 of method 300 corresponds to S220 of method 200, that is, S320 is applied to S220, wherein the first terminal device transmits sidelink data on a first sidelink transmission resource. , the first sidelink transmission resource corresponds to the sidelink transmission resource of S220 of method 200 and is omitted here for brevity.

For example, the sidelink data includes PSCCH and PSSCH. The first terminal device transmits an SCI to the second terminal device, which is used to schedule sidelink data channels. Optionally, the SCI may include sidelink feedback channel parameter information, optionally the SCI further includes HARQ process information and NDI indication information.

Also, FIG. 12 shows another flow chart of the method 300 in an embodiment of the present application, and as shown in FIG. That is, the second terminal device transmits feedback information to the first terminal device, whereby the first terminal device receives the feedback information transmitted by the at least one second terminal device, the feedback Information indicates whether the sidelink data is received correctly. For example, the feedback information may be ACK or NACK.

Note that S321 of the method 300 corresponds to S221 of the method 200, i.e., S321 is applied to S221, wherein the first terminal device is a part of the sidelink transmission resource of the sidelink transmission resource set. The feedback information is transmitted, and the part of the sidelink transmission resources may refer to the sidelink transmission resources for transmitting the second feedback information of S220 in method 200, and the feedback information of S321 is Corresponding to the second feedback information of S221, the description is omitted here for the sake of brevity.

Optionally, the first terminal device determines that the sidelink data is not correctly received based on the feedback information of the sidelink data of the second terminal device feedback, and the method comprises: 300 further includes S330, retransmitting sidelink data on a second sidelink transmission resource, i.e., if the sidelink data is not received correctly, the first terminal device Retransmit the sidelink data to the at least one second terminal device on a second sidelink transmission resource.

For example, FIG. 13 shows a schematic diagram of sidelink data transmission in an embodiment of the present application, as shown in FIG. 13, all black blocks belong to sidelink transmission resource sets configured by network devices. Here, the first terminal device transmits the first sidelink data to the second terminal device with the resource corresponding to the first black block, and the resource corresponding to the first black block is the sidelink transmission resource If a second terminal device belonging to the first sidelink transmission resource in the set and subsequently received by the first terminal device is feedback information for the first sidelink data is NACK, the first terminal device is , retransmit the first sidelink data to a second terminal device on resources corresponding to a second black block, wherein the second black block belongs to the second sidelink transmission resource in the sidelink transmission resource set. . When the feedback information for the retransmission data of the first side link data received by the first terminal device is ACK, the first terminal device retransmits the first side link data. No need.

Also, the first terminal device needs to transmit the second sidelink data to the second terminal device with the resource corresponding to the third black block, and the resource corresponding to the third black block is the sidelink If the feedback information for the second sidelink data of the second terminal device belonging to the first sidelink transmission resource in the transmission resource set and then received by the terminal device is ACK, the first terminal device receives the There is no need to retransmit the second sidelink data. Then, the first terminal device continues transmission of other sidelink data, for example, transmits third sidelink data on the resource corresponding to the fourth black block, and similarly here, the The resource corresponding to the fourth black block also belongs to the first sidelink transmission resource in the sidelink transmission resource set.

Therefore, according to the sidelink data transmission method in the embodiments of the present application, the sidelink transmission resource configured by the network device in the terminal device may be used by the terminal device for the initial transmission of the sidelink data, or may be used for retransmission. The terminal device can autonomously select resources for initial transmission or retransmission from the configured sidelink transmission resources, thereby reducing signaling overhead with network devices.

Embodiments of the present application further provide a method for transmitting sidelink data, wherein a network device allocates sidelink transmission resources for a terminal device, the terminal device transmits sidelink data on the sidelink transmission resources, If data retransmission is required, the terminal device can select transmission resources from the resource pool to retransmit the data.

Specifically, FIG. 14 shows a schematic diagram of another sidelink data transmission method 400 according to an embodiment of the present application. As shown in FIG. 14, the method 400 includes S410, sending sidelink transmission resource indication information, that is, the network device sends the sidelink transmission resource indication information to the first terminal device, and the first A terminal device receives sidelink transmission resource indication information configured by a network device, and the sidelink transmission resource indication information is used to determine a first sidelink transmission resource.

Note that the network device in the method 400 may be any network device, for example, the network device shown in FIG. 1, and the first terminal device in the method 400 may be any terminal device. There may be, for example, the terminal device shown in FIG. 1, the first terminal device being the sender in the sidelink data transmission process. For ease of distinction, as shown in FIG. 2, the second terminal device is the receiving side in the sidelink data transmission process. Here, it is assumed that there are one or more terminal devices on the receiving side of sidelink data. For example, in a unicast transmission process, one terminal device on the transmitting side corresponds to one terminal device on the receiving side, and multicast transmission In the process, one transmitting terminal device corresponds to a plurality of receiving terminal devices, so the second terminal device may be any receiving terminal device, or the second terminal device may be any receiving terminal device. The terminal device may be a plurality of receiving terminal devices, but the embodiments of the present application are not limited thereto. In the embodiments of the present application, the network device sends the sidelink transmission resource indication information to the first terminal device. and the sidelink transmission resource indication information indicates a first sidelink transmission resource, and the first sidelink transmission resource is used for data transmission between the first terminal device and the second terminal device, for example , a sidelink data channel, a sidelink control channel and/or a sidelink feedback channel. Specifically, the first sidelink transmission resource may be configured in a dynamic configuration manner or in a semi-static manner.

It should be noted that S410 of method 400 corresponds to the network device sending sidelink transmission resource indication information to the first terminal device in S210 of method 200, which is omitted here for the sake of brevity.

For example, the manner in which the network device transmits the sidelink transmission resource indication information and the parameters included in the sidelink transmission resource indication information may refer to the content corresponding to S210. For example, in S410, the sidelink transmission resource indication information is at least one of sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, and uplink transmission resource indication information. , where the uplink transmission resource indication information corresponds to the second uplink transmission resource indication information of S210 of method 200 and is omitted here for brevity.

Here, for ease of distinction, the sidelink transmission resources indicated in the sidelink transmission resource indication information of the method 400 are referred to herein as a first sidelink transmission resource set, and the first sidelink transmission resources are: It is used for data transmission between a first terminal device and a second terminal device.

It should be noted that the difference between S410 of method 400 and S210 of method 200 is that the network device reserves a first uplink transmission resource for transmitting sidelink feedback information to the network device for the first terminal device. Since there is no allocation, ie no transmission of the first uplink transmission resource indication information to the first terminal device, the first terminal device does not need to transmit sidelink feedback information to the network device.

As shown in FIG. 14, the method 400 further includes S420, transmitting sidelink data on a first sidelink transmission resource, i.e., the first terminal device to at least one second terminal device.

Note that S420 of method 400 corresponds to S220 of method 200, i.e., S420 is applied to S220, wherein the first terminal device transmits sidelink data on a first sidelink transmission resource. , the first sidelink transmission resource corresponds to the sidelink transmission resource of S220 of method 200 and is omitted here for brevity.

For example, the sidelink data includes PSCCH and PSSCH. The first terminal device transmits an SCI to the second terminal device, which is used to schedule sidelink data channels. Optionally, the SCI may include sidelink feedback channel parameter information, optionally the SCI further includes HARQ process information and NDI indication information.

Also, FIG. 15 shows another flow chart of the method 400 in an embodiment of the present application, and as shown in FIG. That is, the second terminal device transmits second feedback information to the first terminal device, whereby the first terminal device receives feedback from the sidelink data transmitted by at least one second terminal device. Feedback information is received and the first terminal device determines whether the sidelink data is correctly received based on the feedback information. For example, the feedback information may be ACK or NACK.

It should be noted that S421 of the method 400 corresponds to S221 of the method 200, i.e. S421 is applied to S221, wherein the first terminal device selects a sidelink transmitting the feedback information on a transmission resource, the partial sidelink transmission resource description corresponds to the sidelink transmission resource for transmitting the second feedback information of S220 of method 200, and in S421. The feedback information corresponds to the second feedback information in S221 and is omitted here for brevity.

Optionally, if the first terminal device determines, based on the feedback information of the sidelink data from the second terminal device, that the sidelink data is not correctly received, as shown in FIGS. The method 400 further includes S430 and S440, at S430 obtaining a second sidelink transmission resource from the resource pool, and at S440 retransmitting the sidelink data on the second sidelink transmission resource. Specifically, when the first terminal device determines that the sidelink data is not correctly received, the first terminal device obtains resource pool configuration information and configures a resource pool based on the resource pool configuration information. and the first terminal device retransmits the sidelink data to the at least one second terminal device on a second sidelink transmission resource in the resource pool.

Optionally, the method 400 further comprises terminal device acquiring a second sidelink transmission resource from the resource pool, further comprising acquiring the second sidelink transmission resource further comprising: A terminal device acquires the second sidelink transmission resource from the resource pool by resource listening, or the first terminal device acquires a transmission resource from the resource pool to the second sidelink transmission resource. randomly selected as

Optionally, the listening process includes PSCCH, RSRP measurements, etc., where the RSRP measurements may be PSCCH-RSRP or PSSCH-RSRP measurements, and embodiments of the present application are not limited thereto.

For example, FIG. 16 shows a schematic diagram of another sidelink data transmission in an embodiment of the present application, as shown in FIG. 16, the resources corresponding to the black blocks are the first sidelink transmission resources configured by the network device. A resource corresponding to a block belonging and having a hatched grid belongs to the second sidelink transmission resource in the resource pool. Here, the first terminal device transmits the first sidelink data to the second terminal device with the resource corresponding to the first black block, and the resource corresponding to the first black block is the first side link data If the feedback information for the first sidelink data is NACK, the second terminal device belonging to the link transmission resource and then received by the first terminal device receives the second terminal device from the resource pool. A sidelink transmission resource can be obtained, for example, obtaining a resource corresponding to a listening second block from a resource pool, retransmitting the first sidelink data to a second terminal device on the resource, and The second block belongs to the second sidelink transmission resource. When the feedback information for the retransmission data of the first side link data received by the first terminal device is ACK, the first terminal device retransmits the first side link data. If there is no need, and the feedback information for the retransmission data of the first side link data is still NACK, the second terminal device received by the first terminal device is still NACK, the first terminal device receives the second side from the resource pool Obtain a link transmission resource, for example, obtain a resource corresponding to the listening third block from the resource pool, retransmit the first sidelink data to the second terminal device on the resource again, and belong to the second sidelink transmission resource. Similarly, the feedback information for the retransmission data of the first sidelink data received by the first terminal device is ACK, or until the maximum number of retransmissions is reached, the transmission of the first sidelink data to stop.

Also, the first terminal device needs to transmit the second sidelink data to the second terminal device with the resources corresponding to the fourth black block, and the resources corresponding to the fourth black block are also the first and then the second terminal device received by the terminal device if the feedback information for the second sidelink data is ACK, the first terminal device receives the second sidelink data no need to resend. Then, the first terminal device continues to transmit other sidelink data, for example, transmits the third sidelink data on the resource corresponding to the fifth black block, and similarly, where the The resource corresponding to the fifth black block also belongs to the first sidelink transmission resource.

Therefore, according to the sidelink data transmission method in the embodiments of the present application, the sidelink transmission resource configured by the network device for the terminal device is used for the initial transmission of the sidelink data, and if retransmission is required, the The transmission resource for retransmission data is obtained from the resource pool by the terminal device by listening or otherwise, i.e., the initial transmission of sidelink data uses the transmission resource allocated by the network device, and the retransmission is performed by the terminal device. Utilizing autonomously selected transmission resources, in this way, network devices consider only the first transmission without considering retransmissions when configuring sidelink transmission resources, thereby reducing the signaling overhead between terminal devices and network devices. can be reduced.

It should be noted that in various embodiments of the present application, the magnitude of the serial number of each process above does not imply the order of execution, and the execution order of each process is determined by its function and inherent logic. and does not impose any limitation on the processes carried out in the examples of the present application.

While methods for transmitting sidelink data according to embodiments of the present application have been described in detail above in connection with FIGS. 1-16, terminal devices and network devices according to embodiments of the present application are described in FIGS. A related description is provided below.

As shown in FIG. 17 , the terminal device 500 in the embodiment of the present application includes a processing unit 510 and a transmitting/receiving unit 520 . Optionally, the terminal device 500 performs the method 200 in the embodiments of the present application, specifically, the transmitting/receiving unit 520 receives the sidelink transmission resource indication information configured by the network device and the first uplink transmission configured to receive resource indication information, the sidelink transmission resource indication information indicating a sidelink transmission resource, the first uplink transmission resource indication information indicating a first uplink transmission resource, and the transmitting/receiving unit. 520 is further configured to transmit sidelink data to at least one second terminal device over the sidelink transmission resources, and the transmitting/receiving unit 520 is further configured to transmit sidelink data to the network over the first uplink transmission resources. It is configured to send first feedback information to a device, the first feedback information being used to indicate whether the sidelink data is correctly received.

Optionally, as an embodiment, the first uplink transmission resource indication information comprises period information of the first uplink transmission resource, location information of the time slot in which the first uplink transmission resource is located; location information of time-domain symbols occupied by the first uplink transmission resource within a time slot, information of the number of time-domain symbols occupied by the first uplink transmission resource within a time slot, and the first uplink transmission resource. At least one of frequency domain information of link transmission resources.

Optionally, as an embodiment, said first uplink transmission resource indication information is time interval indication information, and said processing unit 510, based on said time interval indication information and said sidelink transmission resource indication information, It is configured to determine location information of a time slot in which the first uplink transmission resource is located.

Optionally, as an embodiment, the processing unit 510, when the sidelink transmission resource indication information is configured with dynamic scheduling and the DCI for the dynamic scheduling includes the time interval indication information, the It is configured to determine location information of a time slot in which the first uplink transmission resource is located based on time interval indication information and time information of reception of the DCI.

Optionally, as an embodiment, said processing unit 510 determines that said sidelink transmission resource indication information is configured with a second type of sidelink configuration grant, and said RRC for said second type of sidelink configuration grant. or, if the DCI includes the time interval indication information, determining the location information of the time slot in which the first uplink transmission resource is located based on the time interval indication information and the time information of reception of the DCI. Configured.

Optionally, as an embodiment, said processing unit 510 determines that said sidelink transmission resource indication information is configured with a first type of sidelink configuration grant, and said RRC for said first type of sidelink configuration grant. includes the time interval indication information and the time slot offset indication information, determining the starting position of the sidelink transmission resource cycle based on the time slot offset indication information, and determining the time interval indication information and the sidelink transmission resource cycle determining the position information of the time slot in which the first uplink transmission resource is located based on the starting position of the .

Optionally, as an example, the period of the first uplink transmission resource and the sidelink transmission resource are the same.

Optionally, as an example, the transmitting/receiving unit 520 is configured to transmit a PUCCH or PUSCH to the network device on the first uplink transmission resource, wherein the PUCCH or PUSCH receives the first feedback information. including.

Optionally, as an example, the transmitting/receiving unit 520 is configured to receive second feedback information transmitted by the at least one second terminal device, the second feedback information being the Indicates whether sidelink data is received correctly.

Optionally, as an example, the processing unit 510 determines whether the sidelink data is correctly received based on the second feedback information, and if the sidelink data is not correctly received, the determining that the first feedback information indicates that the sidelink data is not correctly received, and if the sidelink data is correctly received, then the first feedback information indicates that the sidelink data is correctly received; configured to determine to direct.

Optionally, as one embodiment, the transmitting/receiving unit 520 receives retransmission resource indication information sent by the network device if the first feedback information indicates that the sidelink data is not received correctly. , the retransmission resource indication information indicates a retransmission resource, and is configured to retransmit the sidelink data to the at least one second terminal device on the retransmission resource.

Optionally, as one embodiment, the transmitting/receiving unit 520 receives configuration permission information sent by the network device, the configuration permission information includes the sidelink transmission resource indication information and the first uplink transmission. Contains resource indication information.

Optionally, as one embodiment, the transmitting/receiving unit 520 receives first configuration permission information sent by the network device, the first configuration permission information including the sidelink transmission resource indication information; Receive second configuration permission information sent by the network device, the second configuration permission information including the first uplink transmission resource indication information.

Optionally, as one example, the first configuration permission information includes related information, or the second configuration permission information includes related information, wherein the related information includes the first upload It indicates that the link transmission resource indication information corresponds to the sidelink transmission resource indication information.

Optionally, as one embodiment, the second configuration permission information includes indication information, the indication information causes the transmitting/receiving unit 520 to transmit the first feedback information on the first uplink transmission resource. to do so.

Optionally, as an example, said sidelink transmission resources are at least one of a sidelink data channel, a sidelink control channel and a sidelink feedback channel between said terminal device and said at least one second terminal device. Used for one transmission.

Optionally, as an example, the sidelink transmission resource indication information is sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, second uplink transmission resource indication. including at least one of information;

Here, the parameter information of the sidelink data channel includes time domain resource parameters of the sidelink data channel, frequency domain resource parameters of the sidelink data channel, demodulation reference signal, transmission scheme, number of transmission layers, modulation coding scheme , maximum number of transmissions, redundancy version information, number of HARQ processes, power control information, size of sidelink data, identification information of terminal devices receiving sidelink data, priority information, delay information, code block group CBG feedback indication, including at least one of whether CSI-RS is included in the sidelink data channel, time domain resource parameters of the CSI-RS, frequency domain resource parameters of the CSI-RS, and channel state information feedback indication information. including at least one of

The parameter information of the sidelink control channel includes at least one of time domain resource parameters of the sidelink control channel and frequency domain resource parameters of the sidelink control channel.

The parameter information of the sidelink feedback channel includes: a time offset of the sidelink feedback channel relative to a sidelink data channel or a sidelink control channel; a time slot parameter of the sidelink feedback channel; a frequency domain resource parameter of the sidelink feedback channel; including at least one of whether sidelink feedback is enabled, a feedback scheme of the sidelink feedback channel, and a format of the sidelink feedback channel.

The second uplink transmission resource indication information is used to determine a second uplink transmission resource, which the transmitting/receiving unit 520 provides to the network device for the sidelink transmission. It is configured to send feedback information for resource indication information.

Optionally, as an example, the transmitting/receiving unit 520 is configured to transmit sidelink control information to the at least one second terminal device on the sidelink transmission resource, the sidelink control information comprising: Used to schedule sidelink data channels.

Optionally, in one embodiment, said sidelink control information comprises at least one of HARQ process information, NDI information, parameter information of said sidelink feedback channel, said sidelink feedback channel Used to carry data channel feedback information.

Optionally, as one example, the sidelink feedback channel format includes a short feedback channel and a long feedback channel.

Optionally, as an example, the short feedback channel occupies one or two time-domain symbols in one timeslot, and the time-domain symbols occupied by the short feedback channel are occupied by a guard interval. The long feedback channel precedes the time-domain symbols or occupies all time-domain symbols used for sidelink transmission other than the guard interval within one timeslot.

Optionally, in one embodiment, the sidelink feedback channel feedback comprises a first scheme and a second scheme, wherein the first scheme is the terminal device and the second terminal device threshold is satisfied, if the second terminal device does not receive the sidelink data correctly, the feedback information is transmitted to the terminal device, the feedback information is NACK information, and the second terminal device receives the sidelink If the data is correctly received, do not send feedback information to the terminal device, and if the terminal device and the second terminal device do not meet the threshold, the second terminal device sends feedback information to the terminal device. without transmitting, as the second scheme, transmitting feedback information to the terminal device based on whether the at least one second terminal device correctly receives the sidelink data, and the feedback information is ACK; information or NACK information.

Optionally, as one embodiment, the processing unit 510, if the sidelink transmission resource indication information includes the second uplink transmission resource indication information, based on the second uplink transmission resource indication information, determining a second uplink transmission resource, transmitting feedback information of the sidelink transmission resource indication information to the network device on the second uplink transmission resource via the transmitting/receiving unit 520, and determining the sidelink transmission resource; Feedback information of indication information indicates whether the transmitting/receiving unit 520 correctly receives the sidelink transmission resource indication information.

It should be noted that the above and other operations and/or functions of individual units within terminal device 500 can each be used to implement the corresponding processing of the terminal device in method 200 of FIGS. For the sake of brevity, the description is omitted here.

Therefore, the terminal device in the embodiments of the present application receives the sidelink transmission resource allocated by the network device, is used only for transmission of new data of the sidelink data, and the sidelink data configured by the network device at the same time receiving the sidelink transmission resource of the feedback information of the sidelink data sent by the network device, thereby feeding back the sidelink data transmission status to the network device, and the network device receives the terminal When a device needs to retransmit sidelink data, it can be implemented with dynamically allocated retransmission resources to improve resource utilization efficiency, and all sidelink transmission resources are allocated by network devices to reduce interference. can.

Optionally, the terminal device 500 performs the method 300 in the embodiments of the present application, specifically, the transmitting/receiving unit 520 is configured to receive sidelink transmission resource indication information configured by a network device. , the sidelink transmission resource indication information indicates a sidelink transmission resource set, and the transmitting/receiving unit 520 further sidelinks to at least one second terminal device on a first sidelink transmission resource in the sidelink transmission resource set. configured to transmit link data, the transmitting/receiving unit 520 is further configured to transmit the at least one second transmission resource on a second sidelink transmission resource in the sidelink transmission resource set if the sidelink data is not received correctly; configured to retransmit the sidelink data to the terminal device;

Optionally, as an example, the transmitting/receiving unit 520 is further configured to receive feedback information of the sidelink data transmitted by the at least one second terminal device, the processing unit 510 , is configured to determine whether the sidelink data is correctly received based on the feedback information.

Optionally, as one embodiment, the transmitting/receiving unit 520 is configured to receive configuration permission information sent by the network device, the configuration permission information including the sidelink transmission resource indication information.

Optionally, and as an example, said first sidelink transmission resources are sidelink data channels, sidelink control channels and sidelink feedback channels of said terminal device and said at least one second terminal device. used for transmission of at least one of

Optionally, in one embodiment, the sidelink transmission resource indication information is among sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, uplink transmission resource indication information. at least one of

Here, the parameter information of the sidelink data channel includes time domain resource parameters of the sidelink data channel, frequency domain resource parameters of the sidelink data channel, demodulation reference signal, transmission scheme, number of transmission layers, modulation coding scheme , maximum number of transmissions, redundancy version information, number of HARQ processes, power control information, size of sidelink data, identification information of terminal devices receiving sidelink data, priority information, delay information, code block group CBG feedback indication, including at least one of whether CSI-RS is included in the sidelink data channel, time domain resource parameters of the CSI-RS, frequency domain resource parameters of the CSI-RS, and channel state information feedback indication information.

The parameter information of the sidelink control channel includes at least one of time domain resource parameters of the sidelink control channel and frequency domain resource parameters of the sidelink control channel.

The parameter information of the sidelink feedback channel includes: a time offset of the sidelink feedback channel relative to a sidelink data channel or a sidelink control channel; a time slot parameter of the sidelink feedback channel; a frequency domain resource parameter of the sidelink feedback channel; including at least one of a format of the sidelink feedback channel, whether sidelink feedback is enabled, and a feedback scheme of the sidelink feedback channel.

The uplink transmission resource indication information is used to determine uplink transmission resources, on which the transmitting/receiving unit 520 sends feedback information for the sidelink transmission resource indication information to the network device. used for

Optionally, as an example, the transmitting/receiving unit 520 is configured to transmit sidelink control information to the at least one second terminal device on the first sidelink transmission resource, wherein the sidelink control The information is used to schedule sidelink data channels.

Optionally, in one embodiment, said sidelink control information comprises at least one of parameter information, HARQ process information and NDI information for said sidelink feedback channel, said sidelink feedback channel Used to carry data channel feedback information.

Optionally, as one example, the sidelink feedback channel format includes a short feedback channel and a long feedback channel.

Optionally, as an example, the short feedback channel occupies one or two time-domain symbols in one timeslot, and the time-domain symbols occupied by the short feedback channel are occupied by a guard interval. The long feedback channel precedes the time-domain symbols or occupies all time-domain symbols used for sidelink transmission other than the guard interval within one timeslot.

Optionally, in one embodiment, the sidelink feedback channel feedback comprises a first scheme and a second scheme, wherein the first scheme is the terminal device and the second terminal device set a threshold if satisfied, if the second terminal device does not correctly receive the sidelink data, send feedback information to the terminal device, the feedback information is NACK information, and the second terminal device receives the sidelink data; is correctly received, do not send feedback information to the terminal device, and if the terminal device and the second terminal device do not meet the threshold, the second terminal device sends feedback information to the terminal device but as the second scheme, the at least one second terminal device transmits feedback information to the terminal device based on whether the sidelink data is correctly received, and the feedback information is ACK information or NACK information.

Optionally, as one embodiment, the processing unit 510 determines uplink transmission resources based on the uplink transmission resource indication information, when the sidelink transmission resource indication information includes the uplink transmission resource indication information. and transmitting feedback information of the sidelink transmission resource indication information to the network device on the uplink transmission resource via the transmitting/receiving unit 520, the feedback information of the sidelink transmission resource indication information being transmitted by the transmitting/receiving unit 520. It indicates whether to correctly receive the sidelink transmission resource indication information.

It should be noted that the above and other operations and/or functions of individual units within terminal device 500 can each be used to implement the corresponding processing of the terminal device in method 300 of FIGS. 11-13; For the sake of brevity, the description is omitted here.

Therefore, according to the terminal device in the embodiments of the present application, the sidelink transmission resources configured in the terminal device by the network device may be used by the terminal device for initial transmission of sidelink data or for retransmission. , the terminal device can autonomously select resources for initial transmission or retransmission from the configured sidelink transmission resources, thereby reducing signaling overhead with network devices.

Optionally, the terminal device 500 performs the method 400 in an embodiment of the present application, specifically, the transmitting/receiving unit 520 is configured to receive sidelink transmission resource indication information configured by a network device; The sidelink transmission resource indication information is used to determine a first sidelink transmission resource, and the transmitting/receiving unit 520 further sidelinks at least one second terminal device on the first sidelink transmission resource. When the processing unit 510 is configured to transmit link data and determines that the sidelink data is not received correctly, the processing unit 510 obtains resource pool configuration information and determines a resource pool based on the resource pool configuration information. , the transmitting/receiving unit 520 is further configured to retransmit the sidelink data to the at least one second terminal device on a second sidelink transmission resource in the resource pool.

Optionally, as an example, the processing unit 510 obtains the second sidelink transmission resource from the resource pool, or transfers transmission resource from the resource pool to the second sidelink transmission resource, via resource listening. It is configured to be randomly selected as a sidelink transmission resource.

Optionally, as an example, the transmitting/receiving unit 520 is further configured to receive feedback information of the sidelink data transmitted by the at least one second terminal device, the processing unit 510 and further configured to determine whether the sidelink data is correctly received based on the feedback information.

Optionally, as one embodiment, the transmitting/receiving unit 520 is configured to receive configuration permission information sent by the network device, the configuration permission information including the sidelink transmission resource indication information.

Optionally, and as an example, said first sidelink transmission resources are sidelink data channels, sidelink control channels and sidelink feedback channels of said terminal device and said at least one second terminal device. used for transmission of at least one of

Optionally, as an example, the first sidelink transmission resource indication information is sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, uplink transmission resource indication. including at least one of information;

Here, the parameter information of the sidelink data channel includes time domain resource parameters of the sidelink data channel, frequency domain resource parameters of the sidelink data channel, demodulation reference signal, transmission scheme, number of transmission layers, modulation coding scheme , maximum number of transmissions, redundancy version information, number of HARQ processes, power control information, size of sidelink data, identification information of terminal devices receiving sidelink data, priority information, delay information, code block group CBG feedback indication, including at least one of whether CSI-RS is included in the sidelink data channel, time domain resource parameters of the CSI-RS, frequency domain resource parameters of the CSI-RS, and channel state information feedback indication information.

The parameter information of the sidelink control channel includes at least one of time domain resource parameters of the sidelink control channel and frequency domain resource parameters of the sidelink control channel.

The parameter information of the sidelink feedback channel includes: a time offset of the sidelink feedback channel relative to a sidelink data channel or a sidelink control channel; a time slot parameter of the sidelink feedback channel; a frequency domain resource parameter of the sidelink feedback channel; including at least one of a format of the sidelink feedback channel, whether sidelink feedback is enabled, and a feedback scheme of the sidelink feedback channel.

The uplink transmission resource indication information is used to determine uplink transmission resources, on which the transmitting/receiving unit 520 sends feedback information for the sidelink transmission resource indication information to the network device. used for

Optionally, as an example, the transmitting/receiving unit 520 is configured to transmit sidelink control information to the at least one second terminal device on the first sidelink transmission resource, wherein the sidelink control The information is used to schedule sidelink data channels.

Optionally, in one embodiment, said sidelink control information comprises at least one of parameter information, HARQ process information and NDI information for said sidelink feedback channel, said sidelink feedback channel Used to carry data channel feedback information.

Optionally, as one example, the sidelink feedback channel format includes a short feedback channel and a long feedback channel.

Optionally, as an example, the short feedback channel occupies one or two time-domain symbols in one timeslot, and the time-domain symbols occupied by the short feedback channel are occupied by a guard interval. The long feedback channel precedes the time-domain symbols or occupies all time-domain symbols used for sidelink transmission other than the guard interval within one timeslot.

Optionally, in one embodiment, the sidelink feedback channel feedback comprises a first scheme and a second scheme, wherein the first scheme is the terminal device and the second terminal device set a threshold if satisfied, if the second terminal device does not correctly receive the sidelink data, send feedback information to the terminal device, the feedback information is NACK information, and the second terminal device receives the sidelink data; is correctly received, do not send feedback information to the terminal device, and if the terminal device and the second terminal device do not meet the threshold, the second terminal device sends feedback information to the terminal device but as the second scheme, the at least one second terminal device transmits feedback information to the terminal device based on whether the sidelink data is correctly received, and the feedback information is ACK information or NACK information.

Optionally, as one embodiment, the processing unit 510 further determines uplink transmission resources based on the uplink transmission resource indication information, if the sidelink transmission resource indication information includes the uplink transmission resource indication information. and transmitting feedback information of the sidelink transmission resource indication information to the network device on the uplink transmission resource via the transmitting/receiving unit 520, wherein the feedback information of the sidelink transmission resource indication information is sent to the transmitting/receiving unit. 520 indicates whether it correctly receives the sidelink transmission resource indication information.

It should be noted that the above and other operations and/or functions of individual units within the terminal device 500 can each be used to implement the corresponding processing of the terminal device in the method 400 of FIGS. 14-16; For the sake of brevity, the description is omitted here.

Therefore, the sidelink transmission resource configured by the network device received by the terminal device in the embodiments of the present application is used for the initial transmission of the sidelink data, and if retransmission is required, the transmission resource for the retransmission data is acquired from the resource pool by the terminal device by listening or otherwise, i.e., the initial transmission of sidelink data uses the transmission resource allocated by the network device, and the retransmission is autonomously selected by the terminal device. Utilizing the transmission resources, in this way, the network device can only consider the first transmission without considering the retransmission when configuring the transmission resource of the sidelink, thus reducing the signaling overhead between the terminal device and the network device. can.

As shown in FIG. 18, network device 600 in an embodiment of the present application includes transceiver unit 610 . Optionally, the network device 600 performs the method 200 in the embodiments of the present application, specifically, the transmitting/receiving unit 610 sends sidelink transmission resource indication information and first uplink transmission resource indication information to a terminal device. wherein the sidelink transmission resource indication information indicates sidelink transmission resources, the sidelink transmission resources that the first terminal device sidelinks to at least one second terminal device used to transmit data, the first uplink transmission resource indication information indicates a first uplink transmission resource, and the transmitting/receiving unit 610 further determines the first uplink transmission resource on the first uplink transmission resource; is configured to receive first feedback information transmitted by a terminal device of , wherein the first feedback information is used to indicate whether the sidelink data is correctly received.

Optionally, as one embodiment, the first uplink transmission resource indication information is the first terminal device indicating periodicity information of the first uplink transmission resource, the first uplink transmission resource is location information of the timeslot in which it is located; location information of time-domain symbols occupied by the first uplink transmission resource in the timeslot; number of time-domain symbols occupied by the first uplink transmission resource in the timeslot; and frequency domain information of the first uplink transmission resource.

Optionally, as one embodiment, said first uplink transmission resource indication information is time interval indication information, and said first terminal device, based on said time interval indication information and said sidelink transmission resource indication information, is used to determine the location information of the time slot in which the first uplink transmission resource is located.

Optionally, as an embodiment, said transmitting/receiving unit 610 is configured to configure said sidelink transmission resource indication information for said terminal device in dynamic scheduling, wherein: DCI includes the time interval indication information, and the first terminal device determines the location of the time slot in which the first uplink transmission resource is located based on the time interval indication information and time information of reception of the DCI. Used to determine information.

Optionally, as an embodiment, said transmitting/receiving unit 610 is configured to configure said sidelink transmission resource indication information for said terminal device with a second type of sidelink configuration grant, wherein said The time interval indication information is included in RRC or DCI for a second type sidelink configuration grant, and the first terminal device, based on the time interval indication information and time information of reception of the DCI, the It is used to determine the location information of the timeslot in which the first uplink transmission resource is located.

Optionally, as an embodiment, said transmitting/receiving unit 610 is configured to configure said sidelink transmission resource indication information for said terminal device with a first type of sidelink configuration grant, wherein said The RRC for the first type sidelink configuration grant includes the time interval indication information and the timeslot offset indication information, and the first terminal device determines whether the sidelink transmission resource based on the timeslot offset indication information used to determine the start position of a period and to determine the position information of the time slot in which the first uplink transmission resource is located based on the time interval indication information and the start position of the sidelink transmission resource period; .

Optionally, as an example, the first uplink transmission resource and the sidelink transmission resource have the same periodicity.

Optionally, as an example, said transmitting/receiving unit 610 receives a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH transmitted by said first terminal device on said first uplink transmission resource. so that the PUCCH or PUSCH includes the first feedback information.

Optionally, as one embodiment, the transmitting/receiving unit 610 further provides retransmission resource indication information to the first terminal device if the first feedback information indicates that the sidelink data is not received correctly. and the retransmission resource indication information indicates a retransmission resource used by the first terminal device to retransmit the sidelink data to the at least one second terminal device.

Optionally, as an embodiment, the transmitting/receiving unit 610 is configured to transmit configuration permission information to the first terminal device, the configuration permission information includes the sidelink transmission resource indication information and the first of uplink transmission resource indication information.

Optionally, as an example, the transmitting/receiving unit 610 transmits first configuration permission information to the first terminal device, the first configuration permission information including the sidelink transmission resource indication information; Sending second configuration permission information to the first terminal device, the second configuration permission information including the first uplink transmission resource indication information.

Optionally, as one example, the first configuration permission information includes related information, or the second configuration permission information includes related information, wherein the related information includes the first upload indicating that the link transmission resource indication information corresponds to the sidelink transmission resource indication information;

Optionally, as one embodiment, the second configuration permission information includes indication information, the indication information is for the first terminal device to transmit the first feedback information on the first uplink transmission resource. Used to tell it to send.

Optionally, and as an example, said sidelink transmission resources are sidelink data channels, sidelink control channels and sidelink feedback channels of said first terminal device and said at least one second terminal device. used for transmission of at least one of

Optionally, as an example, the sidelink transmission resource indication information is sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, second uplink transmission resource indication. including at least one of information;

Here, the parameter information of the sidelink data channel includes time domain resource parameters of the sidelink data channel, frequency domain resource parameters of the sidelink data channel, demodulation reference signal, transmission scheme, number of transmission layers, modulation coding scheme , maximum number of transmissions, redundancy version information, number of HARQ processes, power control information, size of sidelink data, identification information of terminal devices receiving sidelink data, priority information, delay information, code block group CBG feedback indication, including at least one of whether CSI-RS is included in the sidelink data channel, time domain resource parameters of the CSI-RS, frequency domain resource parameters of the CSI-RS, and channel state information feedback indication information.

The parameter information of the sidelink control channel includes at least one of time domain resource parameters of the sidelink control channel and frequency domain resource parameters of the sidelink control channel.

The parameter information of the sidelink feedback channel includes: a time offset of the sidelink feedback channel relative to a sidelink data channel or a sidelink control channel; a time slot parameter of the sidelink feedback channel; a frequency domain resource parameter of the sidelink feedback channel; including at least one of a format of the sidelink feedback channel, whether sidelink feedback is enabled, and a feedback scheme of the sidelink feedback channel.

The second uplink transmission resource indication information is used by the first terminal device to determine a second uplink transmission resource, which is used by the first terminal device to determine the second uplink transmission resource. is used to send feedback information for the sidelink transmission resource indication information to the network device.

Optionally, as one example, the sidelink feedback channel format includes a short feedback channel and a long feedback channel.

Optionally, as an example, the short feedback channel occupies one or two time-domain symbols in one timeslot, and the time-domain symbols occupied by the short feedback channel are occupied by a guard interval. The long feedback channel precedes the time-domain symbols or occupies all time-domain symbols used for sidelink transmission other than the guard interval within one timeslot.

Optionally, in one embodiment, the sidelink feedback channel feedback comprises a first scheme and a second scheme, wherein the first scheme is the first terminal device and the second terminal device. satisfies the threshold, if the second terminal device does not correctly receive the sidelink data, send feedback information to the first terminal device, the feedback information is NACK information, and the second terminal device If the terminal device correctly receives the sidelink data, do not send feedback information to the first terminal device, and if the first terminal device and the second terminal device do not meet the threshold, the second The terminal device does not send feedback information to the first terminal device, and as the second scheme, based on whether the at least one second terminal device correctly receives the sidelink data, the first Feedback information is sent to one terminal device, and the feedback information is ACK information or NACK information.

Optionally, as one embodiment, the transmitting/receiving unit 610 further comprises transmitting the first uplink transmission resource on a second uplink transmission resource if the sidelink transmission resource indication information includes the second uplink transmission resource indication information. receiving feedback information of the sidelink transmission resource indication information sent by the terminal device of the second uplink transmission resource indication information, the second uplink transmission resource indication information indicating the second uplink transmission resource, the sidelink transmission resource indication Informational feedback information indicates whether the first terminal device correctly receives the sidelink transmission resource indication information.

It should be noted that the above and other operations and/or functions of individual units within network device 600 may each be used to implement the corresponding processes of the network device in method 200 of FIGS. For the sake of brevity, the description is omitted here.

Therefore, according to the network device in the embodiment of the present application, the sidelink transmission resource allocated by the network device to the terminal device is only used for the transmission of new data of the sidelink data, and constitutes the sidelink transmission resource of the sidelink data. At the same time, configure a transmission resource for transmitting sidelink data feedback information for the terminal device, so that the terminal device feeds back the sidelink data transmission status to the network device, and the network device informs the terminal device that the sidelink data If data retransmission is required, it can be implemented with dynamically allocated retransmission resources to improve resource utilization efficiency, and all sidelink transmission resources can be allocated by network devices to reduce interference.

Optionally, the network device 600 performs the method 300 in an embodiment of the present application, specifically, the transmitting/receiving unit 610 is configured to transmit sidelink transmission resource indication information to a terminal device, and the sidelink The transmission resource indication information indicates a sidelink transmission resource set, a first sidelink transmission resource in the sidelink transmission resource set for the first terminal device to transmit sidelink data to at least one second terminal device. and a second sidelink transmission resource in the sidelink transmission resource set is configured such that if the first terminal device determines that the sidelink data is not correctly received, the first terminal device Used to retransmit the sidelink data to at least one second terminal device.

Optionally, as an embodiment, the transmitting/receiving unit 610 is configured to send configuration permission information to the terminal device, wherein the configuration permission information includes the sidelink transmission resource indication information.

Optionally, and as an example, said first sidelink transmission resources are a sidelink data channel, a sidelink control channel and a sidelink feedback of said first terminal device and said at least one second terminal device. Used for transmission of at least one of the channels.

Optionally, in one embodiment, the sidelink transmission resource indication information is among sidelink data channel parameter information, sidelink control channel parameter information, sidelink feedback channel parameter information, uplink transmission resource indication information. including at least one of

Here, the parameter information of the sidelink data channel includes time domain resource parameters of the sidelink data channel, frequency domain resource parameters of the sidelink data channel, demodulation reference signal, transmission scheme, number of transmission layers, modulation coding scheme , maximum number of transmissions, redundancy version information, number of HARQ processes, power control information, size of sidelink data, identification information of terminal devices receiving sidelink data, priority information, delay information, code block group CBG feedback indication, including at least one of whether CSI-RS is included in the sidelink data channel, time domain resource parameters of the CSI-RS, frequency domain resource parameters of the CSI-RS, and channel state information feedback indication information.

The parameter information of the sidelink control channel includes at least one of time domain resource parameters of the sidelink control channel and frequency domain resource parameters of the sidelink control channel.

The parameter information of the sidelink feedback channel includes: a time offset of the sidelink feedback channel relative to a sidelink data channel or a sidelink control channel; a time slot parameter of the sidelink feedback channel; a frequency domain resource parameter of the sidelink feedback channel; including at least one of a format of the sidelink feedback channel, whether sidelink feedback is enabled, and a feedback scheme of the sidelink feedback channel.

The uplink transmission resource indication information is used by the first terminal device to determine uplink transmission resources, which are used by the first terminal device for the sidelink transmission to the network device. Used to send feedback information for resource indication information.

Optionally, as one example, the sidelink feedback channel format includes a short feedback channel and a long feedback channel.

Optionally, as an example, the short feedback channel occupies one or two time-domain symbols in one timeslot, and the time-domain symbols occupied by the short feedback channel are occupied by a guard interval. The long feedback channel precedes the time-domain symbols or occupies all time-domain symbols used for sidelink transmission other than the guard interval within one timeslot.

Optionally, in one embodiment, the sidelink feedback channel feedback comprises a first scheme and a second scheme, wherein the first scheme is the first terminal device and the second terminal device. satisfies a threshold, if the second terminal device does not receive the sidelink data correctly, send feedback information to the first terminal device, the feedback information is NACK information, and the second terminal device If the terminal device correctly receives the sidelink data, do not send feedback information to the first terminal device, and if the first terminal device and the second terminal device do not meet the threshold, the second The terminal device does not send feedback information to the first terminal device, and as the second scheme, based on whether the at least one second terminal device correctly receives the sidelink data, the first Feedback information is sent to one terminal device, and the feedback information is ACK information or NACK information.

Optionally, as one embodiment, the transmitting/receiving unit 610 further comprises transmitting by the first terminal device on uplink transmission resources if the sidelink transmission resource indication information includes the uplink transmission resource indication information. and receiving feedback information of the sidelink transmission resource indication information, the uplink transmission resource indication information indicating the uplink transmission resource, the feedback information of the sidelink transmission resource indication information being the first terminal device. receives the sidelink transmission resource indication information correctly.

It should be noted that the above and other operations and/or functions of individual units within network device 600 may each be used to implement the corresponding processes of the network device in method 300 of FIGS. 11-13, For the sake of brevity, the description is omitted here.

Therefore, the sidelink transmission resources configured in the terminal device by the network device in the embodiments of the present application may be used by the terminal device for initial transmission of sidelink data or for retransmission, and the terminal device may use the By autonomously selecting resources for initial transmission or retransmission on configured sidelink transmission resources, signaling overhead with network devices can be reduced.

FIG. 19 is a schematic structural diagram of a communication device 700 provided in an embodiment of the present application. The communication device 700 shown in FIG. 19 includes a processor 710, which is capable of recalling and executing computer programs from memory to implement methods in embodiments herein.

Optionally, as shown in FIG. 19, communication device 700 may further include memory 720 . Processor 710 may recall and execute computer programs from memory 720 to implement the methods of the embodiments herein.

Here, the memory 720 may be a separate component independent of the processor 710 or integrated with the processor 710 .

Optionally, as shown in Figure 19, the communication device 700 may further comprise a transceiver 730 that can be controlled by the processor 710 to communicate with other devices, particularly to transmit information or information to other devices. It can transmit data or receive information or data transmitted from other devices.

Here, transceiver 730 may include a transmitter and a receiver. Transceiver 730 may further include one or more antennas.

Optionally, the communication device 700 may specifically be the network device of the embodiments of the present application, and the communication device 700 implements corresponding flows implemented by the network devices in the methods of the embodiments of the present application. and its description is omitted here for the sake of brevity.

Optionally, the communication device 700 may specifically be the mobile terminal/terminal device of the embodiments of the present application, and the communication device 700 is implemented by the mobile terminal/terminal device of the methods of the embodiments of the present application. corresponding flow may be implemented, and its description is omitted here for the sake of brevity.

FIG. 20 is a schematic configuration diagram of a chip according to an embodiment of the present application. The chip 800 shown in FIG. 20 includes a processor 810 that implements the methods of the embodiments of the present application by recalling and executing computer programs from memory.

Optionally, chip 800 may further include memory 820, as shown in FIG. Processor 810 may recall and execute computer programs from memory 820 to implement the methods of the embodiments herein.

Here, the memory 820 may be a separate component independent of the processor 810 or integrated with the processor 810 .

Optionally, this chip 800 can further include an input interface 830 . Here, the processor 810 can control the input interface 830 to communicate with other devices or chips, specifically to obtain information or data sent from other devices or chips.

Optionally, chip 800 may further include output interface 840 . Processor 810 may control output interface 840 to communicate with other devices or chips, and in particular, output information or data to other devices or chips.

Optionally, the chip is applied to the network device in the embodiments of the present application, and the chip can implement a corresponding flow implemented by the network device in the methods of the embodiments of the present application; Therefore, its description is omitted here.

Optionally, the chip is applied to a mobile terminal/terminal device in the embodiments of the present application, and the chip implements a corresponding flow implemented by the mobile terminal/terminal device in the methods of the embodiments of the present application. , and its description is omitted here for the sake of brevity.

It should be understood that the chips referred to in the examples of this application may also be referred to as system level chips, system chips, chip systems or system-on-chips.

FIG. 21 is a schematic block diagram of a communication system 900 provided in an embodiment of the present application. As shown in FIG. 21, communication system 900 includes terminal device 910 and network device 920 .

Here, the terminal device 910 may be used to implement corresponding functions implemented by terminal devices in the above method, and the network device 920 may be used to implement corresponding functions implemented by network devices in the above method. It may be used to implement the functionality and is omitted here for the sake of brevity.

The processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps described above in the method embodiments may be accomplished by instructions in the form of hardware integrated logic or software within a processor. The above-mentioned processor may be a general-purpose processor, DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. There may be. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented and executed. A general-purpose processor may be a microprocessor, any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly embodied to be executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules within the decoding processor. It may be embodied as A software module may reside in any storage medium known in the art, such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, or the like. The storage medium is arranged in the memory and the processor reads the information in the memory and together with its hardware performs the steps of the above method.

It should be appreciated that the memory in the embodiments herein can be volatile memory, non-volatile memory, or include both volatile and non-volatile memory. Here, the nonvolatile memory may be Read-Only Memory, Programmable ROM, EPROM, Electrically EPROM, or flash memory. Volatile memory can also be Random Access Memory (RAM), used as an external cache. By way of example and not limitation, static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM), and direct memory bus random access memory (Direct Rambus Many forms of RAM are available, such as RAM, DR RAM). Note that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

Note that the memory described above is exemplary and not restrictive. (DDR SDRAM) double data rate synchronous dynamic random access memory, ESDRAM (enhanced SDRAM), SLDRAM (sync link DRAM), DR RAM (Direct Rambus RAM), and the like. Thus, memory in embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.

Embodiments of the present application further provide a computer-readable storage medium storing a computer program.

Optionally, the computer-readable storage medium is applied to the network device in the embodiments of the present application, and the computer program is stored in a computer according to the corresponding flow implemented by the network device in the methods of the embodiments of the present application. and its description is omitted here for brevity.

Optionally, the computer-readable storage medium is applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program is stored in a computer by the mobile terminal/terminal device in the methods of the embodiments of the present application. For the sake of brevity, the corresponding flow to be implemented is omitted here.

Embodiments of the present application further provide a computer program product comprising computer program instructions.

Optionally, the computer program product is applied to a network device in the embodiments of the present application, and the computer program instructions cause the computer to perform corresponding flows implemented by the network device in the methods of the embodiments of the present application. and its description is omitted here for brevity.

Optionally, the computer program product is applied to a mobile terminal/terminal device in the embodiments of the present application and the computer program instructions are implemented in a computer by the mobile terminal/terminal device in the methods of the embodiments of the present application. corresponding flow is executed, and its description is omitted here for brevity.

Embodiments of the present application further provide computer programs.

Optionally, the computer program may be applied to the network device in the embodiments of the present application, and when the computer program is executed on the computer, the computer may be implemented by the network device in the methods of the embodiments of the present application. corresponding flow is executed, and its description is omitted here for brevity.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is executed on the computer, the computer performs the mobile terminal in the methods of the embodiments of the present application. / The corresponding flow implemented by the terminal device is performed, and its description is omitted here for brevity.

Those skilled in the art will recognize that each example unit and algorithm step described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Will. Whether these functions are implemented in hardware or software depends on the particular application and design constraints of the technical solution. Skilled artisans may use different methods for each particular application to implement the described functionality, but such implementations should not be viewed as departing from the scope of the present application.

For convenience and brevity of explanation, those skilled in the art may refer to the corresponding steps in the above method embodiments for the specific operation steps of the above-described systems, devices and units, and here they are. It will be understood that explanations are omitted.

It should be appreciated that in some of the examples provided herein, the disclosed systems, devices, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, for example, the division of units described is only the division of one logical function, and there may be additional divisions when actually implemented; For example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In other respects, mutual couplings or direct couplings or communication connections shown or discussed are not indirect couplings or couplings through any interface, device or unit, electrical, mechanical or otherwise. It may be a communication connection.

The means described as said separating means may or may not be physically separated, and the means indicated as means may or may not be physical means. , that is, it may be centrally located or distributed over multiple network elements. In addition, in order to achieve the purpose of this embodiment, a part or all of them can be selected as necessary.

Also, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. may be accumulated in

Moreover, when these functions are implemented as software functions and sold or used as independent products, they may be stored in a computer-readable recording medium. Based on this understanding, the technical solution of the present application essentially embodies the part that contributes to the prior art or the part of the technical solution in the form of a software product stored in a storage medium. and the software product causes a computing device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. including instructions for The storage medium includes U-disks, portable hard disks, read-only memories, ROMs, random access memories, RAMs, magnetic disks, optical disks, etc., which can store various program codes.

As described above, the embodiments of the present application have been described based on the technical ideas of the present application. are included in the technical scope of the present application. Therefore, the protection scope of this application should be defined only by the protection scope of the claims.

Claims (15)

a first terminal device receiving sidelink transmission resource indication information and first uplink transmission resource indication information configured by a network device;
the first terminal device transmitting sidelink data to at least one second terminal device on sidelink transmission resources;
the first terminal device transmitting first feedback information to the network device on a first uplink transmission resource;
The sidelink transmission resource indication information indicates the sidelink transmission resource, the first uplink transmission resource indication information indicates the first uplink transmission resource, and the first feedback information indicates the sidelink data. A method of transmitting sidelink data, characterized by indicating whether or not it is correctly received. The first uplink transmission resource indication information comprises:
Periodic information of the first uplink transmission resource, location information of a time slot in which the first uplink transmission resource is located, location information of a time domain symbol occupied by the first uplink transmission resource within a time slot. , information of the number of time-domain symbols occupied by the first uplink transmission resource in a timeslot, and frequency-domain information of the first uplink transmission resource. The method of transmitting sidelink data according to claim 1, characterized in that: the first uplink transmission resource indication information is time interval indication information;
The method further comprises:
wherein the first terminal device determines location information of a time slot in which the first uplink transmission resource is located based on the time interval indication information and the sidelink transmission resource indication information. The method for transmitting sidelink data according to claim 1 or 2. The first terminal device determining location information of a time slot in which the first uplink transmission resource is located based on the time interval indication information and the sidelink transmission resource indication information;
When the sidelink transmission resource indication information is configured for dynamic scheduling and the time interval indication information is included in the DCI for the dynamic scheduling, the first terminal device receives the time interval indication information and the DCI. Determining location information of a time slot in which the first uplink transmission resource is located based on time information of reception;
If the sidelink transmission resource indication information is configured with a second type sidelink configuration grant, and the time interval indication information is included in the RRC or DCI for the second type sidelink configuration grant, the second A terminal device determining location information of a time slot in which the first uplink transmission resource is located based on the time interval indication information and the DCI reception time information;
The sidelink transmission resource indication information comprises a first type sidelink configuration grant, and the RRC for the first type sidelink configuration grant includes the time interval indication information and the time slot offset indication information. case, the first terminal device determines a start position of a sidelink transmission resource period based on the time slot offset indication information, and determines the first position based on the time interval indication information and the start position of the sidelink transmission resource period. 4. The method of claim 3, comprising at least one of determining location information of a time slot in which one uplink transmission resource is located. The method further comprises:
receiving, by the first terminal device, second feedback information transmitted by the at least one second terminal device for indicating whether the sidelink data is correctly received;
The method further comprises:
determining whether the sidelink data is correctly received by the first terminal device based on the second feedback information;
If the sidelink data is not correctly received, the first terminal device determines the first feedback information for indicating that the sidelink data is not correctly received;
and determining the first feedback information for indicating that the sidelink data was correctly received by the first terminal device, if the sidelink data was correctly received. The method for transmitting sidelink data according to any one of claims 1 to 4. The sidelink transmission resource is used for transmission of at least one of a sidelink data channel, a sidelink control channel and a sidelink feedback channel between the first terminal device and the at least one second terminal device. The sidelink data transmission method according to any one of claims 1 to 5, characterized in that: the sidelink transmission resource indication information includes at least one of sidelink data channel parameter information, sidelink control channel parameter information, and sidelink feedback channel parameter information;
The parameter information of the sidelink data channel includes a time domain resource parameter of the sidelink data channel, a frequency domain resource parameter of the sidelink data channel, a demodulation reference signal, a modulation coding scheme, a maximum number of transmissions, a hybrid automatic repeat request HARQ Process number, power control information, identification information of terminal device receiving sidelink data, priority information, delay information, code block group CBG feedback indication, said sidelink data channel includes channel state information reference signal CSI-RS including at least one of whether
The sidelink control channel parameter information includes at least one of a time domain resource parameter of the sidelink control channel and a frequency domain resource parameter of the sidelink control channel,
The sidelink feedback channel parameter information includes: a time offset of the sidelink feedback channel relative to a sidelink data channel or a sidelink control channel; a time slot parameter of the sidelink feedback channel; a frequency domain resource parameter of the sidelink feedback channel; including at least one of whether sidelink feedback is enabled;
7. The method for transmitting sidelink data according to claim 6, characterized in that: transmitting sidelink data to at least one second terminal device on the sidelink transmission resource by the first terminal device,
the first terminal device transmitting sidelink control information for scheduling a sidelink data channel to the at least one second terminal device on the sidelink transmission resource;
The sidelink control information further includes at least one of HARQ process information, new data indication NDI information, parameter information of the sidelink feedback channel, wherein the sidelink feedback channel is feedback of the sidelink data channel. The method for transmitting sidelink data according to claim 7, characterized in that it is used to carry information. The feedback scheme of the sidelink feedback channel includes a first scheme and a second scheme,
As the first method, when the first terminal device and the second terminal device satisfy the threshold, if the second terminal device does not receive the sidelink data correctly, the first terminal sending feedback information to a device, and not sending feedback information to the first terminal device when the feedback information is unacknowledged NACK information and the second terminal device correctly receives sidelink data;
In the second scheme, feedback information is sent to the first terminal device according to whether the at least one second terminal device correctly receives the sidelink data, and the feedback information is confirmation ACK information. or NACK information. a network device transmitting sidelink transmission resource indication information and first uplink transmission resource indication information to the terminal device;
the network device receiving first feedback information transmitted by the first terminal device on a first uplink transmission resource;
The sidelink transmission resource indication information indicates a sidelink transmission resource, the sidelink transmission resource is used by the first terminal device to transmit sidelink data to at least one second terminal device, and the sidelink data, wherein first uplink transmission resource indication information indicates said first uplink transmission resource, and said first feedback information indicates whether said sidelink data is correctly received. transmission method. The method of claim 10, wherein the first uplink transmission resource has the same period as the sidelink transmission resource. the network device receiving first feedback information transmitted by the first terminal device on the first uplink transmission resource;
said network device receiving a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH transmitted by said first terminal device on said first uplink transmission resource; including 1 feedback information,
The method further comprises:
If the first feedback information indicates that the sidelink data is not received correctly, the network device transmits retransmission resource indication information to the first terminal device, wherein the retransmission resource indication information is retransmitted. indicating a resource, said retransmission resource being used by said first terminal device to retransmit said sidelink data to said at least one second terminal device. 1. The sidelink data transmission method according to 1. the network device sending sidelink transmission resource indication information and first uplink transmission resource indication information to the terminal device;
said network device transmitting configuration permission information to said first terminal device, said configuration permission information including said sidelink transmission resource indication information and said first uplink transmission resource indication information; The sidelink data transmission method according to any one of claims 10 to 12. A terminal device, characterized in that it performs the method according to any one of claims 1-9. A network device, characterized in that it performs the method according to any one of claims 10-13.

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