CN114128197B

CN114128197B - Side-link communication method and device

Info

Publication number: CN114128197B
Application number: CN201980098502.3A
Authority: CN
Inventors: 王婷; 唐浩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2023-09-01
Anticipated expiration: 2039-08-19
Also published as: CN114128197A; WO2021031090A1

Abstract

A side-link communication method and device are applicable to the fields of V2X, internet of vehicles, intelligent network vehicle connection, auxiliary driving, intelligent driving and the like, and the method comprises the following steps: the method comprises the steps that a first terminal device generates and transmits a first DMRS, wherein the first DMRS is used for demodulating first side uplink information in first time domain resources; the first terminal device generates and transmits a second DMRS for demodulating second side-link information in the second time domain resource. Since the first terminal device may transmit the first DMRS for demodulating the first side-link information in the first time domain resource and the second DMRS for demodulating the second side-link information in the second time domain resource in the same time unit, the side-link information in the two time domain resources that do not overlap in the time domain may be received and demodulated using different DMRS, so that the transmission performance on the side-link may be improved.

Description

Side-link communication method and device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for side uplink communications.

Background

A terminal device may communicate with another terminal device via a Sidelink (SL) and a terminal device may also communicate with a network device via an Uplink (UL). Currently, transmission of the side link may require that the total transmission power of the side link control information and/or data information remains constant over symbols of the side link information transmission within one slot. If this condition is met, in the scenario that the side uplink transmission and the uplink transmission coexist, and the side uplink information and the uplink information use the same transmission channel, when symbols occupied by the side uplink information and the uplink information exist in a time slot and are partially overlapped, the total transmission power of the terminal device in the time slot is hopped, and the power hopping can cause inaccurate channel estimation of a receiving party, so that the transmission performance of the side uplink information is affected.

Disclosure of Invention

The embodiment of the application provides a method and a device for side-link communication, which are used for improving transmission performance on a side-link.

In a first aspect, an embodiment of the present application provides a communication method, which may be performed by a terminal device or may be performed by an apparatus (e.g. a processor and/or a chip) in the terminal device, where the method includes: the method comprises the steps that a first terminal device generates a first demodulation reference signal (DMRS) and sends the first DMRS, wherein the first DMRS is used for demodulating first side uplink information in a first time domain resource; the first terminal equipment generates a second DMRS and sends the second DMRS, wherein the second DMRS is used for demodulating second side uplink information in a second time domain resource; the first DMRS and the second DMRS are located in the same time unit, and the first time domain resource and the second time domain resource are not overlapped in time.

By adopting the technical scheme provided by the application, the first terminal equipment can send the first DMRS for demodulating the first side link information in the first time domain resource and the second DMRS for demodulating the second side link information in the second time domain resource in the same time unit, so that the side link information in the two time domain resources which are not overlapped in the time domain can be received and demodulated by adopting different DMRS, and the transmission performance on the side link is improved.

With reference to the first aspect, in one possible design of the first aspect, the first time domain resource is further used for carrying uplink information. I.e. the first time domain resource may carry first side uplink information and uplink information, and the second time domain resource may carry second side uplink information. In this way, in the scenario where there is coexistence of the side link information and the uplink information, the side link information on the time domain resource where the side link information and the uplink information are multiplexed and the side link information on the time domain resource where the side link information and the uplink information are not multiplexed can be received and demodulated by using different DMRS, so that the problem that the total transmission power on the first terminal device is hopped due to parallel transmission of the uplink information and the side link information, so that channel estimation is inaccurate and thus reception is incorrect when channel transmission of the side link information changes can be effectively avoided.

With reference to the first aspect, in one possible design of the first aspect, the first side link information includes side link control information and first side link data information, and the second side link information includes second side link data information; the first DMRS is used for demodulating the side-link control information and/or the first side-link data information, and the second DMRS is used for demodulating the second side-link data information. In this way, the side link data information on the first time domain resource where the side link control information and the side link data information are multiplexed and the side link data information on the second time domain resource where the side link control information is not multiplexed can also be received and demodulated by using different DMRS, so that the problem that the correct receiving of the side link data information is affected due to the fact that the transmitting power of the side link data information on the first time domain resource is different from that of the side link data information on the second time domain resource because the power of the side link control channel is amplified can be avoided.

With reference to the first aspect, in one possible design of the first aspect, the side-link control information is used to schedule transmission of the first side-link data information and transmission of the second side-link data information. In this way, side-uplink data information scheduled by the same side-uplink control information and located on non-overlapping time domain resources can be received and demodulated using different DMRSs. It can also be understood that the side-link data information on different time domain resources in the same time unit can be received and demodulated by using different DMRS, so that the reliability of transmission of the side-link data information can be improved, and the problem that the correct reception of the side-link data information is affected due to the parallel transmission of the uplink information or the power amplification of the side-link control information when the side-link control information and the side-link data information are frequency division multiplexed is avoided.

With reference to the first aspect, in one possible design of the first aspect, the first terminal device may further send first indication information, where the first indication information is used to indicate the first time domain resource and/or the second time domain resource.

With reference to the first aspect, in one possible design of the first aspect, the first terminal device may further send second indication information, where the second indication information is used to indicate a location of the first DMRS and/or a location of the second DMRS.

In a second aspect, an embodiment of the present application provides a communication method, which may be performed by a terminal device or may be performed by an apparatus (e.g. a processor and/or a chip) in the terminal device, where the method includes: the second terminal equipment receives a first demodulation reference signal (DMRS) which is used for demodulating first side uplink information in first time domain resources; the second terminal equipment receives a second DMRS, wherein the second DMRS is used for demodulating second side uplink information in a second time domain resource; the first DMRS and the second DMRS are located in the same time unit, and the first time domain resource and the second time domain resource are not overlapped in time.

By adopting the technical scheme provided by the application, the second terminal equipment can receive the first DMRS and the second DMRS which are sent by the first terminal equipment in the same time unit, demodulate the first side link information in the first time domain resource according to the first DMRS, and demodulate the second side link information in the second time domain resource according to the second DMRS, so that the side link information in the two time domain resources which are not overlapped in the time domain can be received and demodulated by adopting different DMRS, thereby improving the transmission performance on the side link.

With reference to the second aspect, in one possible design of the second aspect, the first time domain resource is further used for carrying uplink information. I.e. the first time domain resource may carry first side uplink information and uplink information, and the second time domain resource may carry second side uplink information. In this way, in the scenario where there is coexistence of the side link information and the uplink information, the side link information on the time domain resource where the side link information and the uplink information are multiplexed and the side link information on the time domain resource where the side link information and the uplink information are not multiplexed can be received and demodulated by using different DMRS, so that the problem that the total transmission power on the first terminal device is hopped due to parallel transmission of the uplink information and the side link information, so that channel estimation is inaccurate and thus reception is incorrect when channel transmission of the side link information changes can be effectively avoided.

With reference to the second aspect, in one possible design of the second aspect, the first side link information includes side link control information and first side link data information, and the second side link information includes second side link data information; the first DMRS is used for demodulating the side-link control information and/or the first side-link data information, and the second DMRS is used for demodulating the second side-link data information. In this way, the side link data information on the first time domain resource where the side link control information and the side link data information are multiplexed and the side link data information on the second time domain resource where the side link control information is not multiplexed can also be received and demodulated by using different DMRS, so that the problem that the correct receiving of the side link data information is affected due to the fact that the transmitting power of the side link data information on the first time domain resource is different from that of the side link data information on the second time domain resource because the power of the side link control channel is amplified can be avoided.

With reference to the second aspect, in one possible design of the second aspect, the side-link control information is used to schedule transmission of the first side-link data information and transmission of the second side-link data information. In this way, side-uplink data information scheduled by the same side-uplink control information and located on non-overlapping time domain resources can be received and demodulated using different DMRSs. It can also be understood that the side-link data information on different time domain resources in the same time unit can be received and demodulated by using different DMRS, so that the reliability of transmission of the side-link data information can be improved, and the problem that the correct reception of the side-link data information is affected due to the parallel transmission of the uplink information or the power amplification of the side-link control information when the side-link control information and the side-link data information are frequency division multiplexed is avoided.

With reference to the second aspect, in one possible design of the second aspect, the second terminal device may further receive first indication information, where the first indication information is used to indicate the first time domain resource and/or the second time domain resource.

With reference to the second aspect, in one possible design of the second aspect, the second terminal device may further receive second indication information, where the second indication information is used to indicate a location of the first DMRS and/or a location of the second DMRS.

In a third aspect, an embodiment of the present application provides a communication apparatus having a function of implementing a first terminal device in any one of the possible designs of the first aspect or the first aspect, or having a function of implementing a second terminal device in any one of the possible designs of the second aspect or the second aspect. The device may be a terminal device, for example, a handheld terminal device, a vehicle-mounted terminal device, a vehicle user device, a road side unit, or the like, or may be a device included in a terminal device, for example, a chip, or may be a device including a terminal device. The functions of the terminal device may be implemented by hardware, or may be implemented by executing corresponding software by hardware, where the hardware or software includes one or more modules corresponding to the functions.

In one possible design, the structure of the apparatus includes a processing module and a transceiver module, where the processing module is configured to support the apparatus to perform a function corresponding to the first terminal device in the first aspect or any of the designs of the first aspect, or perform a function corresponding to the second terminal device in the second aspect or any of the designs of the second aspect. The transceiver module is configured to support communication between the apparatus and other communication devices, for example, when the apparatus is a first terminal device, the first DMRS may be sent to a second terminal device. The communication device may also include a memory module coupled to the processing module that holds the program instructions and data necessary for the device. As an example, the processing module may be a processor, the communication module may be a transceiver, and the storage module may be a memory, where the memory may be integrated with the processor or may be separately provided from the processor, and the present application is not limited thereto.

In another possible design, the device may include a processor and may also include a memory. The processor is coupled to the memory and operable to execute computer program instructions stored in the memory to cause the apparatus to perform the method of the first aspect, or any of the possible designs of the first aspect, or to perform the method of the second aspect, or any of the possible designs of the second aspect, as described above. Optionally, the apparatus further comprises a communication interface, the processor being coupled to the communication interface. When the apparatus is a terminal device, the communication interface may be a transceiver or an input/output interface; when the apparatus is a chip contained in a terminal device, the communication interface may be an input/output interface of the chip. Alternatively, the transceiver may be a transceiver circuit and the input/output interface may be an input/output circuit.

In a fourth aspect, an embodiment of the present application provides a chip system, including: a processor coupled to a memory for storing a program or instructions that when executed by the processor cause the chip system to implement the method of the first aspect or any of the possible designs of the first aspect or implement the method of the second aspect or any of the possible designs of the second aspect.

Alternatively, the processor in the system-on-chip may be one or more. The processor may be implemented in hardware or in software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general purpose processor, implemented by reading software code stored in a memory.

Alternatively, the memory in the system-on-chip may be one or more. The memory may be integral with the processor or separate from the processor, and the application is not limited. The memory may be a non-transitory processor, such as a ROM, which may be integrated on the same chip as the processor, or may be separately provided on different chips, and the type of memory and the manner of providing the memory and the processor are not particularly limited in the present application.

In a fifth aspect, embodiments of the present application provide a storage medium having stored thereon a computer program or instructions which, when executed, cause a computer to perform the method of any one of the possible designs of the first aspect or the first aspect described above, or to perform the method of any one of the possible designs of the second aspect or the second aspect described above.

In a sixth aspect, embodiments of the present application provide a computer program product which, when read and executed by a computer, causes the computer to perform the method of any one of the possible designs of the first aspect or the first aspect described above, or to perform the method of any one of the possible designs of the second aspect or the second aspect described above.

In a seventh aspect, an embodiment of the present application provides a communication system, which includes the first terminal device and/or the second terminal device. Optionally, a network device may also be included in the communication system.

Drawings

Fig. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of the present application is applicable;

fig. 2 is a schematic flow chart of a method for side uplink communication according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a time unit according to an embodiment of the present application;

Fig. 4 is a schematic diagram of parallel transmission of uplink information and side uplink information in scenario one provided by the embodiment of the present application;

fig. 5 is a schematic diagram of a first time domain resource and a second time domain resource in a first scenario provided by an embodiment of the present application;

fig. 6 is a schematic diagram of a multiplexing manner of side uplink control information and side uplink data information in a first scenario provided by an embodiment of the present application;

fig. 7a to fig. 7c are schematic diagrams of uplink information, side uplink control information, and side uplink data information in a first scenario provided by the embodiments of the present application;

fig. 8a to 8c are schematic diagrams of several possible first DMRS and second DMRS in a first scenario provided by an embodiment of the present application;

fig. 9 is a schematic diagram of a start symbol or an end symbol in a time unit for allowing uplink information and side uplink information to be transmitted in parallel according to an embodiment of the present application;

fig. 10 is a schematic diagram of a position of a first DMRS and/or a position of a second DMRS predefined in a time unit according to an embodiment of the present application;

fig. 11 is a schematic diagram of determining a position of a first DMRS and/or a position of a second DMRS according to a first time domain resource and a second time domain resource according to an embodiment of the present application;

Fig. 12a and 12b are schematic diagrams of patterns for providing the location and time domain resources of multiple DMRSs in an embodiment of the present application;

fig. 13 is a schematic diagram of transmitting side uplink information in a second scenario provided by an embodiment of the present application;

fig. 14 is a schematic diagram of a first time domain resource and a second time domain resource in a second scenario provided by an embodiment of the present application;

fig. 15a and fig. 15b are schematic diagrams of a first DMRS and a second DMRS in a second scenario provided by an embodiment of the present application;

fig. 16 is a flow chart of another method for side-uplink communication according to an embodiment of the present application;

fig. 17 is a schematic diagram of a third DMRS according to an embodiment of the present application;

fig. 18 is a flowchart of yet another method for side-uplink communication according to an embodiment of the present application;

fig. 19 is a schematic diagram of a fourth DMRS according to an embodiment of the present application;

FIG. 20 is a schematic diagram of an apparatus according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 22 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD), a fifth generation (5th generation,5G) system, a New Radio (NR) system, or application to a future evolution communication system or other similar communication system, etc.

The technical scheme of the embodiment of the application can be applied to the technical fields of unmanned driving (unmanned driving), assisted driving (driver assistance, ADAS), intelligent driving (intelligent driving), internet driving (connected driving), intelligent internet driving (intelligent network driving), car sharing (car sharing), intelligent car (smart/intelligent car), digital car (digital car), unmanned car (unmanned car/driven car/pilot car/automatic), car networking (internet of vehicles, ioV), automatic car (self-driving car, automatic car), road cooperation (cooperative vehicle infrastructure, CVIS), intelligent traffic (intelligent transport system, ITS), vehicle-mounted communication (vehicular communication), unmanned plane communication, air communication, satellite communication and the like.

In addition, the technical scheme provided by the embodiment of the application can be applied to a cellular link and also can be applied to a link between devices, such as a device-to-device (D2D) link. The D2D link or the car-to-everything (vehicle to everything, V2X) link may also be referred to as a side link, secondary link, side link, or side link, etc. In embodiments of the present application, the terms described above may all refer to links between devices of the same type. The links between the devices of the same type may be links between terminal devices, links between base stations, links between relay nodes, or the like, which is not limited in the embodiment of the present application. The link between the terminal device and the terminal device may be a D2D link, or may be a V2X link from car to car, car to cell phone, or car to any entity.

Fig. 1 is a schematic diagram of a network architecture of a communication system according to an embodiment of the present application. The communication system comprises a terminal device 110 and a terminal device 120. The terminal equipment and the terminal equipment can communicate through a PC5 interface, and a direct communication link between the terminal equipment and the terminal equipment is a side uplink. The side-link based communication may use at least one of the following channels: a physical side downlink shared channel (physical sidelink shared channel, PSSCH) for carrying side downlink data information; a physical side-link control channel (physical sidelink control channel, PSCCH) for carrying side-link control information (sidelink control information, SCI).

The communication system further comprises a network device 130, the network device 130 being operable to communicate with at least one terminal device, such as the terminal device 110, via a Uu interface. The communication links between the network device and the terminal device include Uplink (UL) and Downlink (DL).

The network device in fig. 1 may be an access network device, such as a base station. The access network device corresponds to different devices in different systems, for example, corresponds to the access network device in 5G, for example, the gNB, in the 5G system. Although only terminal device 110 and terminal device 120 are shown in fig. 1, it should be understood that the network device may serve more terminal devices, and the number of network devices and terminal devices in the communication system is not limited in this embodiment of the present application. The terminal device in fig. 1 is described by taking a vehicle-mounted terminal device or a vehicle as an example, and it should be understood that the terminal device in the embodiment of the present application is not limited thereto, and the terminal device may be a vehicle-mounted module, a road side unit, or a pedestrian handheld device. It should be understood that the embodiments of the present application are not limited to 4G or 5G systems, but are also applicable to communication systems that evolve later.

In the following, some terms in the embodiments of the present application will be explained.

1) A terminal device, which may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc. The terminal device may communicate with the core network via a radio access network (radio access network, RAN), exchanging voice and/or data with the RAN. For example, the terminal device may be a handheld device having a wireless connection function, an in-vehicle device, a vehicle user device, or the like. Currently, examples of some terminal devices are: a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), an unmanned aerial vehicle, air communication, satellite communication, and the like. The terminal device in the embodiment of the application may also be a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit which are built in a vehicle as one or more components or units, and the vehicle may implement the method of the application through the built-in vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

2) The network device may be a node in a radio access network, also referred to as a base station, and also referred to as a radio access network (radio access network, RAN) node (or device). For example, the network device may include an evolved base station (eNB or e-NodeB, evolutional Node B) in a long term evolution (long term evolution, LTE) system or an evolved LTE system (LTE-advanced, LTE-a), such as a conventional macro base station eNB and a micro base station eNB in a heterogeneous network scenario, or may also include a next generation Node B (next generation Node B, gNB) in a fifth generation mobile communication technology (5th generation,5G) system or a New Radio (NR) system, or may further include a transmission receiving point (transmission reception point, TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), a baseband pool BBU pool, or a wireless fidelity (wireless fidelity, wiFi) Access Point (AP), or the like, or may further include a Centralized Unit (CU) and/or a Distributed Unit (DU), which embodiments of the present application are not limited. As another example, the network device may be a Road Side Unit (RSU) in V2X, and the RSU may be a device supporting V2X applications, and may exchange messages with other devices supporting V2X applications.

3) The terms "system" and "network" in embodiments of the application may be used interchangeably. "plurality" means two or more, and "plurality" may also be understood as "at least two" in this embodiment of the present application. "at least one" may be understood as one or more, for example as one, two or more. For example, including at least one means including one, two or more, and not limiting what is included. For example, at least one of A, B and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C may be included. Likewise, the understanding of the description of "at least one" and the like is similar. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/", unless otherwise specified, generally indicates that the associated object is an "or" relationship.

Unless stated to the contrary, the embodiments of the present application refer to ordinal terms such as "first," "second," etc., for distinguishing between multiple objects, and are not intended to limit the order, timing, priority, or importance of the multiple objects, nor are the descriptions of "first," "second," etc., to limit the objects to be different.

Referring to fig. 2, a flow chart of a communication method according to an embodiment of the application is shown, and the method includes steps S201 to S204 as follows:

step S201, the first terminal device generates a first demodulation reference signal (demodulation reference signal, DMRS), and transmits the first DMRS, where the first DMRS is used to demodulate first side link information in the first time domain resource. Step S202, the first terminal device generates a second DMRS, and sends the second DMRS, where the second DMRS is used to demodulate second side uplink information in the second time domain resource.

Step S203, the second terminal device receives the first DMRS.

Step S204, the second terminal device receives the second DMRS.

It should be noted that, the execution sequence of the steps S201 to S204 is not specifically limited, and the execution sequence of each step is defined according to the logic therein. For example, the first terminal device may generate the first DMRS before transmitting the first DMRS, and the first terminal device may generate the second DMRS before transmitting the second DMRS, but the first terminal device generates the first DMRS and the second DMRS, and if the first DMRS and the second DMRS are transmitted, there is no certain precedence relationship, and the first DMRS and the second DMRS may be generated simultaneously or not simultaneously, or may be transmitted simultaneously or not simultaneously. The second terminal device may receive the first DMRS after the first terminal device generates and/or transmits the second DMRS, or the second terminal device may receive the first DMRS before the first terminal device generates and/or transmits the second DMRS.

In the embodiment of the present application, the first DMRS and the second DMRS may be located in the same time unit. The time unit may be one of a plurality of time granularity time domain units such as a radio frame, a subframe, a slot, a minislot, a mini-slot, or a symbol. The time unit may be understood as a scheduling unit in the time domain, and may also be referred to as a time domain unit or scheduling unit or have other names, and the present application is not limited thereto. Specifically, one radio frame may include one or more subframes, for example, if the duration of one radio frame is 10 ms and the duration of one subframe is 1 ms, one radio frame may include 10 subframes. One subframe may include one or more slots, or include one or more minislots. One slot may include one or more symbols, for example, under a normal Cyclic Prefix (CP), one slot may include 14 symbols, and under an extended CP, one slot may include 12 symbols. For different subcarrier spacings, there may be different slot lengths, for example, the duration of one slot may be 1 millisecond for a subcarrier spacing of 15kHz and 0.5 millisecond for a subcarrier spacing of 30 kHz. Alternatively, for example, the duration of one slot may be 1 millisecond when the subcarrier spacing is 15kHz and the duration of two slots 1 millisecond when the subcarrier spacing is 30 kHz. A minislot (or mini-slot) may also include one or more symbols, but a minislot (or mini-slot) is a smaller unit of time than a slot. For example, one minislot (or mini-slot) may include 2 symbols, 4 symbols, or 7 symbols. A slot may also include one or more minislots (or mini-slots). Fig. 3 illustrates a radio frame, subframe, slot, minislot, mini-slot, symbol, etc. domain unit with a subcarrier spacing of 15 kHz.

The first time domain resource and the second time domain resource do not overlap in time. Alternatively, the first time domain resource and the second time domain resource may be time domain resources in the same time unit. The time unit may include one or more symbols in the time domain.

In different application scenarios, the implementation manner of the first time domain resource and the second time domain resource may be different. The first time domain resource and the second time domain resource are described in detail below for two possible application scenarios.

Scene one, uplink information, and side uplink information coexist.

In scenario one, a first time domain resource may be used to carry uplink information and first side uplink information and a second time domain resource may be used to carry second side uplink information.

As shown in fig. 4, there is parallel transmission of uplink information and side-uplink information in the time unit. The first terminal device may send uplink information to the network device using a portion of the time domain resources in the time unit, while the first terminal device may also send side uplink information to the second terminal device using a portion or all of the time domain resources in the time unit.

In this scenario, the first time domain resource and the second time domain resource in the time unit may be as shown in fig. 5. It will be appreciated that there is overlap, but not complete overlap, of the time domain resources occupied by the uplink information with the time domain resources occupied by the side uplink information. The first time domain resource specifically refers to a portion where a time domain resource occupied by uplink information overlaps a time domain resource occupied by side uplink information, and the second time domain resource specifically refers to a portion where the time domain resource occupied by side uplink information does not overlap the time domain resource occupied by uplink information. The first side-link information refers to side-link information in the first time domain resource and the second side-link information refers to side-link information in the second time domain resource.

The sidelink information in embodiments of the present application may comprise one or more of sidelink control information, sidelink data information, or sidelink feedback information, wherein the sidelink control information may be carried on a physical sidelink control channel (physical sidelink control channel, PSCCH), the sidelink data information may be carried on a physical sidelink shared channel (physical sidelink shared channel, PSCCH), the sidelink control information may also be referred to as a scheduling assignment (scheduling assignment, SA), and the sidelink data information may also be referred to simply as data (data). The side-link feedback information may be carried on a side-link feedback channel (physical sidelink feedback channel, PSFCH) and may include one or more of Acknowledgement (ACK)/negative acknowledgement (negative acknowledge, NACK), and/or channel state information (channel state information, CSI).

In this scenario, the side-downlink control information and the side-downlink data information may have a number of possible multiplexing manners. As shown in fig. 6, in option 1A, side-link control information and side-link data information may be multiplexed in a time-division manner. That is, in one time unit, the time domain resources occupied by the side-link control information and the side-link data information are different, for example, different time domain symbols may be occupied, but the frequency domain resources occupied by the side-link control information and the side-link data information are the same. In option 1B, the side-link control information and the side-link data information are multiplexed in a time-division manner as well. In one time unit, the time domain resources occupied by the side-link control information and the side-link data information are different, and the frequency domain resources occupied by the side-link control information and the side-link data information are also different. In option2, the side-link control information and the side-link data information may be multiplexed in a frequency division manner. In one time unit, the time domain resources occupied by the side-link control information and the side-link data information are the same, but the occupied frequency domain resources are different. In option 3, the sidelink control information and the sidelink data information may occupy different time domain resources and different frequency domain resources. That is, the side-link control information may be time division multiplexed with the side-link data information on certain frequency domain resources, or it may be understood that the side-link control information may be frequency division multiplexed with the side-link data information on certain time domain resources.

Considering various multiplexing manners of the side-link control information and the side-link data information in the side-link information, multiplexing of the uplink information and the side-link information in the embodiment of the present application can be extended to more various cases as shown in fig. 7a to 7 c.

In the embodiment of the present application, the first terminal device keeps constant the transmission power of the side uplink information transmitted on the symbol of the side uplink information transmission in one time slot, and the uplink information and the side uplink information share the same Power Amplifier (PA). The uplink information and the side uplink information may share one power amplifier on the same carrier, or may share one power amplifier on different carriers, which is not limited by the present application. The uplink information and the side-uplink information share the same power amplifier, and it is also understood that the uplink information and the side-uplink information share one transmission channel or transmission link, or are transmitted using the same radio frequency unit, or the like.

If the transmission power of the side uplink information is kept constant for the same power amplifier, when there is parallel transmission of the uplink information and the side uplink information, if the time domain resources occupied by the uplink information and the side uplink information do not completely overlap, the total transmission power of the first terminal device may jump. For example, as shown in case 1 in fig. 5, the side-link information is transmitted in the entire time unit, and the transmission power of the side-link information is kept constant, always P1, over each symbol included in the time unit; uplink information is transmitted on the second half symbol of the time unit, and the transmission power of the uplink information is P2. It can be seen that, due to the introduction of the uplink information, the total transmission power of the first terminal device will change from P1 to pi+p2, i.e. the total transmission power of the first terminal device is hopped, on the time domain resource where both the side uplink information and the uplink information exist. The hopping of the total transmission power of the first terminal device may cause the phase of the side uplink information in the first time domain resource to be different from the phase of the side uplink information in the second time domain resource, thereby affecting the correct reception of the side uplink information by the second terminal device.

Therefore, in the embodiment of the present application, the first terminal device may send two DMRS to the second terminal device, and the second terminal device demodulates the side-link information in the first time domain resource, that is, the first side-link information, according to the first DMRS, and demodulates the side-link information in the second time domain resource, that is, the second side-link information, according to the second DMRS, thereby avoiding the problem of channel estimation caused by the total transmission power jump of the first terminal device, and improving the transmission performance of the side-link information.

Fig. 8a schematically illustrates a first DMRS and a second DMRS in scenario one of the present application, where the first DMRS is located in a first time domain resource and the second DMRS is located in a second time domain resource. Specifically, a first DMRS may be used to demodulate side-link information in a first time domain resource, and a second DMRS may be used to demodulate side-link information in a second time domain resource.

In a possible implementation, the sidelink information in the first time domain resource comprises sidelink control information and/or first sidelink data information, and the sidelink information in the second time domain resource comprises second sidelink data information. The first DMRS is configured to demodulate the side-link control information and/or the first side-link data information, and the second DMRS is configured to demodulate the second side-link data information.

In another possible implementation, the sidelink information in the first time domain resource comprises first sidelink data information, and the sidelink information in the second time domain resource comprises sidelink control information and/or second sidelink data information. The first DMRS is configured to demodulate the first side-link data information, and the second DMRS is configured to demodulate the side-link control information and/or the second side-link data information.

Fig. 8b schematically illustrates a first DMRS and a second DMRS in scenario one of the present application, where the first DMRS is located in a first time domain resource and the second DMRS is located in a second time domain resource. Specifically, the first DMRS may be used to demodulate side-uplink data information in the first time domain resource, and the second DMRS may be used to demodulate side-uplink data information in the second time domain resource. That is, the first DMRS is the DMRS corresponding to the PSSCH in the first time domain resource, and the second DMRS is the DMRS corresponding to the PSSCH in the second time domain resource. Also, a ratio of the transmission power of the first DMRS to the transmission power of the side-link data information in the first time domain resource may be 0dB, and a ratio of the transmission power of the second DMRS to the transmission power of the side-link data information in the second time domain resource may be 0dB. Optionally, in this scenario, for the PSCCH, the first terminal device may further send DMRS of the PSCCH for demodulating side-link control information in the second time domain resource.

Fig. 8c illustrates a first DMRS and a second DMRS in scenario one of the present application, where the first DMRS is located in a first time domain resource and the second DMRS is located in a second time domain resource. Specifically, the first DMRS may be used to demodulate side-link control information and side-link data information in the first time domain resource, and the second DMRS may be used to demodulate side-link data information in the second time domain resource. That is, the first DMRS may be DMRS corresponding to the PSCCH in the first time domain resource, and the second DMRS may be DMRS corresponding to the PSCCH in the second time domain resource. Also, a ratio of the transmission power of the first DMRS to the transmission power of the side-link data information in the first time domain resource may be 0dB, and a ratio of the transmission power of the second DMRS to the transmission power of the side-link data information in the second time domain resource may be 0dB.

Optionally, when the first time domain resource is used for carrying side link control information and first side link data information and the second time domain resource is used for carrying second side link data information, the side link control information is used for scheduling transmission of the first side link data information and transmission of the second side link data information. Or, when the second time domain resource is used for carrying the side link control information and the second side link data information, the side link control information is used for scheduling the transmission of the first side link data information and the transmission of the second side link data information when the first time domain resource is used for carrying the first side link data information.

In the embodiment of the application, the first terminal equipment can send the first indication information to the second terminal equipment, wherein the first indication information is used for indicating the first time domain resource and/or the second time domain resource. Alternatively, it is also understood that the first indication information is used to indicate which symbols in the time unit there is a concurrence of uplink information and side uplink information, and/or which symbols there is a transmission of side uplink information and no transmission of uplink information. Alternatively, it is also understood that the first indication information is used to indicate which symbols in the time unit have side-link information received and demodulated using the first DMRS, and/or which symbols have side-link information received and demodulated using the second DMRS.

In one possible design, the first time domain resource and/or the second time domain resource in a time unit may also be predefined, i.e. it may be predefined that there is parallel transmission of uplink information and side-link information at certain symbol positions of a time unit and/or that there is no parallel transmission of uplink information and side-link information at certain symbol positions of a time unit. Alternatively, it may be predefined at certain symbol positions of a time unit that parallel transmission of the start (or end) uplink information and the side uplink information is allowed or power hopping is allowed, and/or at which symbol positions of a time unit that parallel transmission of the start (or end) uplink information and the side uplink information is not allowed or power hopping is allowed. It should be understood that reference to "predefined" in the embodiments of the present application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing or pre-sintering, and will not be described in detail below.

For example, as shown in fig. 9, the time unit is a slot, where the slot includes 14 symbols, and the symbol that allows the uplink information and the side uplink information to be transmitted in parallel may be the 3 rd symbol in the slot, or may be the 5 th symbol in the slot, or may be the 8 th symbol in the slot, or may be the 11 th symbol in the slot. Thus, if the symbol in the slot that allows starting (or ending) parallel transmission of the uplink information and the side uplink information is the 8 th symbol, when there is parallel transmission of the uplink information and the side uplink information in the slot, the first time domain resource defaults to the 8 th symbol in the slot, and the second time domain resource is the 8 th symbol of the symbols in the slot, except for the 8 th symbol. It will be appreciated that each symbol in a slot is typically numbered from 0, and the 3 rd symbol, 5 th symbol, 8 th symbol, 11 th symbol in the slot refer to the number 2, 4, 7, 10 symbols in the slot, respectively. It should also be understood that the time domain resources that allow the uplink information to be transmitted in parallel with the side uplink information are described herein as a single symbol in a time slot, but the time domain resources that allow the uplink information to be transmitted in parallel with the side uplink information in one time slot may also include a plurality of symbols in a time slot, and the plurality of symbols may be continuous or discontinuous, which is not limited by the present application.

In particular, the first time domain resource may be a symbol for side-link information transmission after a start symbol, or the first time domain resource may be a symbol for side-link information transmission before an end symbol. Alternatively, the first time domain resource may include a beginning symbol or an ending symbol.

In particular, the second time domain resource may be a symbol for side-link information transmission before the first symbol, or the second time domain resource may be a symbol for side-link information transmission after the last symbol. Alternatively, the second time domain resource may include a beginning symbol or an ending symbol.

In another possible design, the first time domain resource and/or the second time domain resource may have a plurality of possible candidate resource locations, and the first indication information may indicate which one or more of the plurality of candidate resource locations the first time domain resource and/or the second time domain resource is located. The number of candidate resource locations may be 2, 4, 8, or other values, and the application is not limited. For example, if the first time domain resource and/or the second time domain resource has 2 candidate resource locations, the first time domain resource and/or the second time domain resource may be indicated by 1 bit; if the first time domain resource and/or the second time domain resource have 4 candidate resource positions, the first time domain resource and/or the second time domain resource can be indicated by 2 bits; if the first time domain resource and/or the second time domain resource has 8 candidate resource positions, the first time domain resource and/or the second time domain resource may be indicated by 3 bits.

In another possible design, the first time domain resource and/or the second time domain resource may also be indicated by means of a bitmap. For example, if the time unit is a time slot, and one time slot includes 14 symbols, the bitmap may include 14 bits, and each bit may have a value of 0 or 1. When the value of a bit is 1, it may indicate that the symbol corresponding to the bit belongs to the first time domain resource and/or the second time domain resource, that is, there is parallel transmission of uplink information and side uplink information on the symbol corresponding to the bit. When the value of a bit is 0, it may indicate that a symbol corresponding to the bit does not belong to the first time domain resource and/or the second time domain resource, and there may be transmission of side uplink information and no transmission of uplink information or transmission of uplink information and no transmission of side uplink information on the symbol corresponding to the bit. Alternatively, the meaning of the bit in one bitmap when the value is 1 and the meaning of the bit when the value is 0 may be reversed. That is, when the value of one bit is 0, it may indicate that the symbol corresponding to the bit belongs to the first time domain resource and/or the second time domain resource, and when the value of one bit is 1, it may indicate that the symbol corresponding to the bit does not belong to the first time domain resource and/or the second time domain resource.

Alternatively, the first time domain resource may refer to a time domain resource for side-link information transmission in one time unit except for the second time domain resource.

Alternatively, the second time domain resource may refer to a time domain resource for side-link information transmission in one time unit other than the first time domain resource.

Thus, the first indication information may indicate the first time domain resource, and the second time domain resource is determined according to the above relationship between the first time domain resource and the second time domain resource. Or the first indication information may indicate the second time domain resource, and further determine the first time domain resource according to the above relationship between the first time domain resource and the second time domain resource.

The first indication information may be transmitted through SCI, that is, the first indication information is included in the side uplink control information transmitted from the first terminal device to the second terminal device. Alternatively, the network device may send the first indication information to the first terminal device, for example, the first indication information may be sent through physical layer information (such as downlink control information (downlink control information, DCI) or higher layer signaling, i.e. the first indication information may also be received by the first terminal device from the network device through DCI and then sent to the second terminal device through SCI.

In the embodiment of the present application, the positions of the first DMRS and the second DMRS are not specifically limited. In one possible design, the first terminal device may send second indication information to the second terminal device, for indicating the location of the first DMRS and/or the location of the second DMRS. The first indication information may be sent via SCI, i.e. the second indication information may be included in the side uplink control information sent by the first terminal device to the second terminal device. Alternatively, the network device may send the second indication information to the first terminal device, for example, may be sent through physical layer information (such as DCI) or higher layer signaling. That is, the second instruction information may be received by the first terminal device from the network device through DCI and then transmitted to the second terminal device through SCI.

In another possible design, the location of the first DMRS and/or the location of the second DMRS may also be predefined in the system. For example, as shown in fig. 10, the time unit is one slot, the position of the first DMRS may be predefined as the 3 rd symbol or the 4 th symbol in the slot, and/or the position of the second DMRS may be predefined as the 10 th symbol or the 11 th symbol in the slot.

In another possible design, the location of the first DMRS and/or the location of the second DMRS are also determined from the first time domain resource and/or the second time domain resource. Optionally, the location of the first DMRS and/or the location of the second DMRS is determined according to the location of the first time domain resource and the location of the second time domain resource. For example, the first DMRS may be the 1 st symbol included in the first time domain resource, and/or the second DMRS may be the 1 st symbol included in the second time domain resource. As shown in fig. 11, the time unit is a slot, the first time domain resource includes the 3 rd to 8 th symbols in the slot, the second time domain resource includes the 9 th to 14 th symbols in the slot, and the position of the first DMRS may be the 3 rd symbol of the slot, and/or the position of the second DMRS may be the 9 th symbol in the slot.

In another possible design, the location of the first DMRS may be indicated in the second indication information, the location of the second DMRS may be determined according to predefined or second time domain resources, or may be determined in other ways. Alternatively, the second indication information may also indicate the location of the second DMRS, and the location of the first DMRS may be determined according to a predefined or second time domain resource, or may be determined in other manners.

In another possible design, as shown in fig. 12a and 12b, the location of the first DMRS and the pattern of the first time domain resources and/or the location of the second DMRS and the pattern of the second time domain resources may be predefined.

Alternatively, the DMRS locations and the pattern of time domain resources may also be predefined. The pattern may be applicable to either the first time domain resource or the second time domain resource.

In this scheme, the first terminal device may send indication information to the second terminal device, where the indication information is used to indicate the DMRS position and pattern information of the time domain resource. Based on the pattern information, the terminal device may determine the locations of the first DMRS and the second DMRS. And, based on the pattern information, the terminal device may determine the first time domain resource and the second time domain resource. The indication information may be sent via SCI, i.e. the indication information may be included in the side uplink control information sent by the first terminal device to the second terminal device. Alternatively, the network device may send the indication information to the first terminal device, for example, may be sent through physical layer information (such as DCI) or higher layer signaling. That is, the indication information may be received by the first terminal device from the network device through DCI and then sent to the second terminal device through SCI.

For example, the predefined pattern may have one or more of the following:

the pattern in fig. 12a is a pattern corresponding to one slot. The pattern includes first time domain resources and second time domain resources for transmitting side uplink information.

The pattern in fig. 12b is a pattern corresponding to one or more symbols. The time domain resources for the transmission side uplink information in the time unit may comprise one or more patterns. Such as one pattern for the first time domain resource, one pattern for the second time domain resource, etc. The patterns corresponding to the first time domain resource and the second time domain resource may be the same or different.

The indication information may indicate one or more patterns as time domain resources of the side-uplink information. Such as indicated as pattern 1 and pattern 2 in fig. 12b, or pattern 1 and pattern 6, or pattern 4, or pattern 8, etc. as time domain resources of the side-uplink information. If 2 patterns are indicated, it may be indicated that the first pattern is a pattern corresponding to the first time domain resource and the second pattern is a pattern corresponding to the second time domain resource. According to the indicated pattern, the terminal device may determine a first time domain resource, a first DMRS, a second time domain resource, and a second DMRS.

In the embodiment of the present application, the first terminal device may further send third indication information to the second terminal device, where the third indication information is used to indicate whether a power jump exists in the total transmission power of the first terminal device in the time unit, or is used to indicate whether parallel transmission of uplink information and side uplink information exists in the time unit, or is used to indicate whether a first time domain resource and a second time domain resource exist in the time unit. If there is a power jump, or there is a first time domain resource and a second time domain resource, it indicates that different areas need to use different DMRS for reception demodulation. Or, the third indication information is used for indicating whether different areas demodulate according to different DMRS.

The side-link control information and the side-link data information in the scene two-side-link information are multiplexed by adopting an option 3 mode.

In scenario two, a first time domain resource is used to carry side-link control information and first side-link data information, and a second time domain resource is used to carry second side-link data information, wherein the side-link control information is used to schedule transmission of the first side-link data information and transmission of the second side-link data information. In this scenario, as shown in fig. 13, the first terminal device may transmit side uplink information to the second terminal device. The side-link information includes side-link control information and side-link data information, and the side-link control information and the side-link data information are multiplexed in the manner of option 3 shown in fig. 6.

Fig. 14 exemplarily shows a first time domain resource in which side-link control information and side-link data information multiplexed in a frequency division manner exist and a second time domain resource in which side-link data information exists and side-link control information does not exist in this scenario. In this way, the first time domain resource specifically refers to a time domain resource in which the side uplink data information is multiplexed with the side uplink control information, and the second time domain resource specifically refers to a time domain resource in which the side uplink data information is not multiplexed with the side uplink control information. The first side-link data information refers to side-link data information in a first time domain resource and the second side-link data information refers to side-link data information in a second time domain resource.

The multiplexing manner of the side-link control information and the side-link data information may also be understood as that, from the perspective of the frequency domain, there is side-link control information and side-link data information multiplexed in a frequency division manner on some time domain resources, while there is side-link data information and no side-link control information on other time domain resources included in the time unit.

In this case, whether or not there is parallel transmission of uplink information and side uplink information in a time unit is not considered, and parallel transmission of uplink information and side uplink information may be present in the time unit or may not be present in the time unit.

In this scenario, it is also required that the transmission power of the symbol uplink information transmitted in the slot is kept constant. Alternatively, in order to improve the performance of the PSCCH, the first terminal device may power amplify the PSCCH when transmitting side uplink information, e.g. the transmission power of the PSCCH may be 3dB higher than the transmission power of the PSSCH. It can be seen that if the first terminal device keeps the transmission power of the side uplink information constant, but amplifies the power of the side uplink control information at the same time, the transmission power of the side uplink data information transmitted on the first time domain resource is different from the transmission power of the side uplink data information transmitted on the second time domain resource, and the transmission power of the side uplink data information on the resource block in the first time domain resource is smaller than the transmission power of the side uplink data information on the resource block in the second time domain resource. In this way, if the same DMRS is used to demodulate the side-link data information in the first time domain resource and the side-link data information in the second time domain resource, a ratio of the transmission power of the DMRS to the transmission power of the side-link data information in the first time domain resource is different from a ratio of the transmission power of the DMRS to the transmission power of the side-link data information in the second time domain resource, and thus reception errors of the side-link data information in the first time domain resource or the second time domain resource may be caused.

For different transmission powers of uplink data information on different time domain resources, in the embodiment of the present application, the first terminal device may send two DMRS to the second terminal device, where the second terminal device demodulates the uplink control information and/or the first uplink data information in the first time domain resource according to the first DMRS, and demodulates the second uplink data information in the second time domain resource according to the second DMRS.

Fig. 15a and 15b schematically illustrate a first DMRS and a second DMRS in scenario two according to an embodiment of the present application, where the first DMRS is located in a first time domain resource and the second DMRS is located in a second time domain resource.

Specifically, in one possible scheme, the first DMRS is the DMRS of the PSCCH and the second DMRS is the DMRS of the PSSCH. In this scheme, a first DMRS is used for demodulation of side-link control information and first side-link data information in a first time domain resource, and a second DMRS is used for demodulation of second side-link data information in a second time domain resource. For example, in fig. 15a, a first DMRS is used to demodulate side-link control information and first side-link data information in a first time domain resource. The frequency domain resources occupied by the first DMRS are the same as the frequency domain resources occupied by the side-link control information, and the transmission power of the first DMRS and the side-link control information are also the same, i.e. the ratio of the transmission power is 0dB, so that the first DMRS can be understood as the DMRS of the PSCCH, i.e. the DMRS used for decoding the PSCCH. The ratio of the transmission power of the first DMRS to the transmission power of the first side uplink data information is 3dB, and the second terminal device may also demodulate the first side uplink data information according to the first DMRS and the ratio of the transmission power of the first DMRS to the transmission power of the first side uplink data information. The second DMRS is for demodulating second side uplink data information in the second time domain resource. The frequency domain resources occupied by the second DMRS are the same as the frequency domain resources occupied by the second side uplink data information, and the transmission power of the second DMRS and the second side uplink data information is also the same, that is, the ratio of the transmission power is 0dB, so the second DMRS can be understood as the DMRS of the PSSCH, that is, the DMRS for decoding the PSSCH.

Specifically, in one possible scheme, the first DMRS is the DMRS of the PSSCH, and the second DMRS is the DMRS of the PSSCH. In this scheme, a first DMRS is used for demodulation of first side uplink data information in a first time domain resource, and a second DMRS is used for demodulation of second side uplink data information in a second time domain resource. For example, in fig. 15b, the first DMRS is configured to demodulate the first side uplink data information in the first time domain resource, where the frequency domain resource occupied by the first DMRS is the same as the frequency domain resource occupied by the first side uplink data information, and the transmission power of the first DMRS is the same as the transmission power of the first side uplink data information, and the ratio of the transmission power is 0dB. The second DMRS is configured to demodulate the second side uplink data information in the second time domain resource, where the frequency domain resource occupied by the second DMRS is the same as the frequency domain resource occupied by the second side uplink data information, and the transmission power of the second DMRS is the same as the transmission power of the second side uplink data information, and the ratio of the transmission power is 0dB. It can be understood that the first DMRS and the second DMRS are both DMRS of the PSSCH. Optionally, in this scenario, for the PSCCH, the first terminal device may further transmit the DMRS of the PSCCH for demodulation of the side-link control information.

In the embodiment of the present application, the positions of the first DMRS and the second DMRS are not specifically limited. In one possible design, the first terminal device may send second indication information to the second terminal device, for indicating the location of the first DMRS and/or the location of the second DMRS. The second indication information may be transmitted via SCI, i.e. may be included in the side uplink control information transmitted by the first terminal device to the second terminal device. Alternatively, the network device may send the second indication information to the first terminal device, for example, may be sent through physical layer information (such as DCI) or higher layer signaling. That is, the second instruction information may be received by the first terminal device from the network device through DCI and then transmitted to the second terminal device through SCI.

In another possible design, the location of the first DMRS and/or the location of the second DMRS may also be predefined in the system. For example, the time unit is a slot, the first DMRS is predefined as the 3 rd symbol or 4 th symbol in the slot, and the second DMRS is predefined as the 10 th symbol or 11 th symbol in the slot.

In another possible design, the location of the first DMRS and/or the location of the second DMRS are also determined from the first time domain resource and the second time domain resource. For example, the position of the first DMRS may be the 1 st symbol included in the first time domain resource, and/or the position of the second DMRS may be the 1 st symbol included in the second time domain resource.

It is noted that the side-link information described in the embodiments of the present application may also include side-link feedback information. Wherein the side-link feedback information may be carried on a side-link feedback channel (physical sidelink feedback channel, PSFCH) and may include one or more of Acknowledgement (ACK)/negative acknowledgement (negative acknowledge, NACK), and/or channel state information (channel state information, CSI).

Optionally, the terminal device reports first capability information, where the first capability information is used to indicate whether to support the capability of sending uplink information and side uplink information under power hopping.

Such as the ability of the terminal device to report uplink information and side-uplink information transmissions in support of power hops. The terminal device may keep the power of the side-uplink information constant and proceed with the concurrence of the uplink information and the side-uplink information.

Such as the ability of the terminal device to report uplink information and side-uplink information transmissions without supporting power hopping. The terminal device may keep the total power of the uplink information and the side-uplink information constant and proceed with the concurrence of the uplink information and the side-uplink information.

Optionally, the terminal device reports second capability information, where the second capability information is used to indicate whether to support concurrency capability of uplink information and side uplink information when the time domain resources do not overlap completely.

For example, the terminal device may report concurrency capability supporting uplink information and side-uplink information when the time domain resources do not overlap completely. The terminal device may perform concurrence of the uplink information and the side-uplink information when there is a partial overlap of time domain resources of the uplink information and the side-uplink information.

For example, the terminal device may report the concurrency capability of uplink information and side-uplink information when the time domain resources do not support incomplete overlapping. The terminal device may perform concurrence of the uplink information and the side-uplink information signal when the time domain resources of the uplink information and the side-uplink information completely overlap.

Alternatively, the terminal device may report third capability information indicating whether the capability of the concurrent situation of the uplink information and the side uplink information is supported.

For example, for the case of fig. 7a, fig. 7b, fig. 7c described in the embodiments of the present application, the terminal device may report which one or more of the above cases are supported.

For example, for the case of fig. 7a, fig. 7b, fig. 7c described in the embodiments of the present application, the terminal device may report which one or more of the above cases are not supported.

Referring to fig. 16, a flowchart of another communication method according to an embodiment of the present application is shown, and the method includes steps S1601 to S1604 as follows:

step S1601, the first terminal device generates a third DMRS, and sends the third DMRS.

The third DMRS is located in a first time domain resource, and the third DMRS is configured to demodulate first side uplink data information in the first time domain resource and second side uplink data information in a second time domain resource, where the first time domain resource and the second time domain resource do not overlap in time. The specific implementation of the first time domain resource and the second time domain resource in this embodiment may refer to the description of the second scenario in the foregoing embodiment, which is not repeated herein.

In the embodiment of the application, the first side link information in the first time domain resource can comprise side link control information and first side link data information, and the second side link information in the second time domain resource comprises second side link data information, and the side link control information can be used for scheduling the transmission of the first side link data information and the transmission of the second side link data information.

Fig. 17 illustrates a third DMRS provided by an embodiment of the present application, where the third DMRS is located in the first time domain resource and may occupy the same frequency domain resource as the first side uplink data information.

Step S1602, the second terminal device receives the third DMRS.

In step S1603, the first terminal device generates first information and transmits the first information. The first information is used to indicate a first power ratio, where the first power ratio is a ratio of a transmission power of the third DMRS to a transmission power of the second side uplink data information. The ratio may be, for example, 3dB.

Step S1604, the second terminal device receives the first information.

It should be noted that, the execution sequence of the steps S1601 to S1604 is not specifically limited, and the execution sequence of each step is defined according to the logic therein. For example, the first terminal device may generate the third DMRS before the third DMRS is transmitted, but if the first terminal device generates the first information and transmits the first information, and the first terminal transmits the third DMRS, there is no certain precedence, and the first terminal device may generate the third DMRS at the same time or different times, or may transmit the third DMRS at the same time or different times. The second terminal device receives the third DMRS and the second terminal receives the first information without a certain precedence relationship, and can receive the first information simultaneously or not simultaneously. The second terminal device may receive the third DMRS before the first terminal device generates and/or transmits the first information, or the second terminal device may receive the third DMRS after the first terminal device generates and/or transmits the third DMRS. The second terminal device may receive the first information before the first terminal device generates and/or transmits the third DMRS, or the second terminal device may receive the first information after the first terminal device generates and/or transmits the third DMRS.

In particular, the third DMRS may be configured to demodulate the first side uplink data information and the second side uplink data information.

After receiving the third DMRS and the first information, the second terminal device may demodulate the first side uplink data information according to the third DMRS. The second terminal device may further demodulate the second side uplink data information according to the third DMRS and a ratio between a transmission power of the third DMRS indicated in the first information and a transmission power of the second side uplink information.

In one possible design, the first terminal device may further generate second information indicating a second power ratio, where the second power ratio is a ratio between a transmission power of the third DMRS and a transmission power of the first side uplink data information. Alternatively, since the third DMRS and the first side-link data information are both located in the first time domain resource, the transmission power of the third DMRS and the first side-link data information is generally the same, and thus the second power ratio may be 0dB.

It should be noted that, in the embodiment of the present application, the first terminal device may indicate the first power ratio and/or the second power ratio to the second terminal device by sending the side control information (sidelink information, SCI). The two power ratios may be indicated in the same SCI or may be indicated separately in different SCIs. Optionally, the network device may send the first power ratio to the first terminal device, and/or the second power ratio, e.g. may be sent via physical layer information (e.g. DCI) and/or higher layer signaling. That is, the first power ratio and/or the second power ratio may also be sent by the network device to the first terminal device through physical layer information (such as DCI) and/or higher layer signaling (such as RRC message), and then sent by the first terminal device to the second terminal device through SCI. In addition, the first terminal device may directly indicate a specific value of any one of the power ratios, may indicate an index of the any one of the power ratios in the plurality of candidate power ratios, or may indicate a specific value of one of the power ratios, and the index of the other power ratio indicates a power ratio, which is not limited herein. The plurality of candidate power ratios may include, for example, values of 0dB, 3dB, -3dB, etc., as well as other values, which are not listed here.

Alternatively, the first terminal device may not transmit the first information and/or the second information. For example, the first power ratio and/or the second power ratio may be predefined or may be calculated. Specifically, the present application is not limited thereto.

For example, if the total transmission power of the side uplink information on the symbol of the side uplink information transmission is constant at P, the frequency domain resource occupied by the side uplink control information is B1, and the total frequency domain resource occupied by the side uplink data information is B2 in the time unit, the frequency domain resource occupied by the side uplink control information is B1, and the frequency domain resource occupied by the side uplink data information is (B2-B1) in the first time domain resource. The power of the side-uplink data information in the second time domain resource is P, assuming that in the first used resource the power of the side-uplink control information is N dB higher than the power of the side-uplink data information, where N is an integer.

According to the power calculation formula:

the power of the side-uplink information in the first time domain resource is as follows:

the power formula of PSSCH (SA) is:

the power formula of PSSCH (data) is:

the power of the side-uplink information in the second time domain resource is as follows:

the power formula of PSSCH (data) is:

10log ₁₀ (B2)+P ₁ +α ₁ *PL

Wherein P is ₀ ，α ₀ May be configured by higher layer parameters, may be associated with the PSCCH, and may be higher layer parameters configured by the base station or operator for the terminal device. P (P) ₁ ，α ₁ May be configured by higher layer parameters, may be associated with the PSSCH, and may be higher layer parameters configured by the base station or operator for the terminal device. PL is the path loss.

To ensure that the total transmission power of the uplink is constant on the symbol of the slot, the following is exemplified. The following needs to be satisfied:

wherein a is a power scaling factor under the multiplexing symbol, which can be understood as that a is a power ratio of the side uplink data information in the second time domain resource to the side uplink information in the first time domain resource.

Let P be ₀ ＝P ₁ ，α ₀ ＝α ₁ . The value of A can be determined as follows:

the power ratio in the embodiment of the present application may also be understood as a power difference, and in particular, the present application is not limited thereto.

Referring to fig. 18, a flow chart of another communication method according to an embodiment of the present application is shown, and the method includes the following steps S1801 to S1804:

step S1801, the first terminal device generates a fourth DMRS, and sends the fourth DMRS.

The fourth DMRS is located in a second time domain resource, and the fourth DMRS is configured to demodulate first side uplink data information in a first time domain resource and second side uplink data information in the second time domain resource, where the first time domain resource and the second time domain resource do not overlap in time. The specific implementation of the first time domain resource and the second time domain resource in this embodiment may refer to the description of the second scenario in the foregoing embodiment, which is not repeated herein.

In an embodiment of the present application, the first side link information may include side link control information and first side link data information, and the second side link information includes second side link data information, and the side link control information may be used to schedule transmission of the first side link data information and transmission of the second side link data information.

Fig. 19 illustrates a fourth DMRS provided by an embodiment of the present application, where the fourth DMRS is located in the second time domain resource and may occupy the same frequency domain resource as the second side uplink data information.

Step S1802, the second terminal device receives the fourth DMRS.

Step S1803, the first terminal device generates third information, and transmits the third information. The third information is used for a third power ratio, which is a ratio of a transmission power of the fourth DMRS to a transmission power of the first side uplink data information. The ratio may be, for example, 3dB.

Step S1804, the second terminal device receives the third information.

It should be noted that, the execution sequence of the steps S1801 to S1804 is not specifically limited, and the execution sequence of each step is defined according to the logic therein. For example, the first terminal device may generate the fourth DMRS before transmitting the fourth DMRS, but if the first terminal device generates the first information and transmits the third information, and the first terminal transmits the fourth DMRS, there is no certain precedence, and the first terminal device may generate the fourth DMRS at the same time or different times, or may transmit the fourth DMRS at the same time or different times. The second terminal device receives the fourth DMRS and the second terminal receives the third information without a certain precedence relationship, and can receive the third information simultaneously or not simultaneously. The second terminal device may receive the fourth DMRS before the first terminal device generates and/or transmits the third information, or the second terminal device may receive the fourth DMRS after the first terminal device generates and/or transmits the fourth DMRS. The second terminal device may receive the third information before the first terminal device generates and/or transmits the fourth DMRS, or the second terminal device may receive the third information after the first terminal device generates and/or transmits the fourth DMRS.

After the second terminal device receives the fourth DMRS and the third information, the second terminal device may demodulate the second side uplink data information according to the fourth DMRS. The second terminal device may further demodulate the first side-link data information according to the fourth DMRS and a ratio of the transmission power of the fourth DMRS indicated in the third information to the transmission power of the first side-link information.

In one possible design, the first terminal device may further generate fourth information indicating a fourth power ratio, where the fourth power ratio is a ratio of a transmission power of the fourth DMRS to a transmission power of the second side uplink data information. Alternatively, since the fourth DMRS and the second side uplink data information are both located in the second time domain resource, the transmission power of the fourth DMRS and the second side uplink data information is generally the same, and thus the ratio may be 0dB.

It should be noted that, in the embodiment of the present application, the first terminal device may indicate the third power ratio and/or the fourth power ratio to the second terminal device by sending the side control information (sidelink information, SCI). The two power ratios may be indicated in the same SCI or may be indicated separately in different SCIs. Optionally, the network device may send the first power ratio to the first terminal device, and/or the second power ratio, e.g. may be sent via physical layer information (e.g. DCI) and/or higher layer signaling. That is, the third power ratio and/or the fourth power ratio may also be sent by the network device to the first terminal device through physical layer information (such as DCI) and/or higher layer signaling (such as RRC message), and then sent by the first terminal device to the second terminal device through SCI. In addition, the first terminal device may directly indicate a specific value of any one of the power ratios, may indicate an index of the any one of the power ratios in the plurality of candidate power ratios, or may indicate a specific value of one of the power ratios, and the index of the other power ratio indicates a power ratio, which is not limited herein. The plurality of candidate power ratios may include, for example, values of 0dB, 3dB, -3dB, etc., as well as other values, which are not listed here.

Alternatively, the first terminal device may not transmit the third information and/or the fourth information. For example, the third power ratio and/or the fourth power ratio may be predefined or may be calculated. Specifically, the present application is not limited thereto. For example, reference may be made to the method for calculating the power ratio in the above embodiment, and details are not repeated here.

The power ratio in the embodiment of the present application may also be referred to as a power difference, and in particular, the present application is not limited thereto.

Alternatively, for the schemes shown in fig. 17 and fig. 18, when the first terminal device transmits a DMRS for demodulating the first side uplink data information in the first time domain resource and the second side uplink data information in the second time domain resource, the symbol position of the DMRS may be predefined or signaled to the second terminal device by the first terminal device. Alternatively, the network device may send indication information to the first terminal device informing the DMRS location, for example, it may send the indication information to the terminal device through physical layer information (such as DCI) and/or higher layer signaling. In this case, when determining the power ratio, the terminal device may determine according to the following method:

When the first power ratio or the third power ratio is indicated, it is necessary to determine whether the current indicated power ratio is the first power ratio or the third power ratio, and the following two methods may be adopted:

one possible implementation method is: indicated in the signaling is a first power ratio or a third power ratio according to the symbol position of the DMRS.

For example, when the symbol position of the DMRS is located in the first time domain resource, the signaling indicates a first power ratio.

For example, when the symbol position of the DMRS is located in the second time domain resource, the signaling indicates a third power ratio.

Another possible implementation method is: and determining whether the first power ratio or the third power ratio is indicated in the signaling according to the pattern information of the DMRS.

The pattern of the DMRS includes location information of the DMRS, and determining the power ratio indicated in the signaling according to the pattern of the DMRS is similar to determining the power ratio in the signaling according to the symbol location of the DMRS. In particular, the present application will not be described in detail.

Optionally, under multiplexing option 3 for the side uplink control information and the side uplink data information, in the various embodiments described above, the terminal device may report its fourth capability information, where the fourth capability information is used to indicate whether to support the various transmission schemes described above. The plurality of transmission schemes include a first terminal device transmitting a first DMRS and a second DMRS for demodulating the first side-link data information and the second side-link data information, the first terminal device transmitting a third DMRS for demodulating the first side-link data information and the second side-link data information, and the first terminal device transmitting a fourth DMRS for demodulating the first side-link data information and the second side-link data information.

Alternatively, the above multiple transmission schemes may be one predefined, or the first terminal device may send indication information to the second terminal device, where the indication information is used to indicate which transmission scheme is used for the side uplink information transmission. For example, the indication information may be transmitted via SCI, i.e. the indication information may be included in the side uplink control information transmitted by the first terminal device to the second terminal device. Alternatively, the network device may send the indication information to the first terminal device, for example, may be sent through physical layer information (such as DCI) or higher layer signaling. That is, the indication information may be received by the first terminal device from the network device through DCI and then sent to the second terminal device through SCI.

Corresponding to the method presented in the above method embodiment, the embodiment of the present application further provides a corresponding apparatus, where the apparatus includes a module for executing the corresponding module of the above embodiment. The modules may be software, hardware, or a combination of software and hardware.

Fig. 20 shows a schematic structure of an apparatus. The apparatus 2000 may be a terminal device, or may be a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device can be used for realizing the method described in the method embodiment, and can be particularly referred to the description in the method embodiment.

The device 2000 may comprise one or more processors 2001, which processor 2001 may also be referred to as a processing unit, which may perform certain control functions. The processor 2001 may be a general purpose processor or a special purpose processor or the like. For example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminals, terminal chips, DUs or CUs, etc.), execute software programs, and process data of the software programs.

In an alternative design, the processor 2001 may also have stored thereon instructions and/or data 2003, which instructions and/or data 1503 may be executed by the processor, so that the apparatus 2000 performs the method described in the method embodiments above.

In another alternative design, the processor 2001 may include a transceiver unit for implementing the receive and transmit functions. For example, the transceiver unit may be a transceiver circuit, or an interface circuit. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.

In yet another possible design, the apparatus 2000 may include circuitry that may implement the functions of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, the apparatus 2000 may include one or more memories 2002, on which instructions 2004 may be stored, which may be executed on the processor, to cause the apparatus 2000 to perform the methods described in the method embodiments above. Optionally, the memory may further store data. In the alternative, the processor may store instructions and/or data. The processor and the memory may be provided separately or may be integrated. For example, the correspondence described in the above method embodiments may be stored in a memory or in a processor.

Optionally, the apparatus 2000 may also include a transceiver 2005 and/or an antenna 2006. The processor 2001 may be referred to as a processing unit, controlling the device 2000. The transceiver 2005 may be referred to as a transceiver unit, a transceiver circuit, a transceiver, or the like, for implementing a transceiver function.

In one possible design, an apparatus 2000 (e.g., an integrated circuit, a wireless device, a circuit module, or a terminal device, etc.) may include: a processor coupled with a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method as shown in fig. 2.

Since the apparatus 2000 may transmit the first DMRS for demodulating the first side link information in the first time domain resource and the second DMRS for demodulating the second side link information in the second time domain resource in the same time unit, the side link information in the two time domain resources that are not overlapped in the time domain may be received and demodulated by using different DMRS, so that the transmission performance on the side link may be improved.

The processors and transceivers described in the present application may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronic devices, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The apparatus described in the above embodiment may be a network device or a terminal device, but the scope of the apparatus described in the present application is not limited thereto, and the structure of the apparatus may not be limited by fig. 20. The apparatus may be a stand-alone device or may be part of a larger device. For example, the device may be:

(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem;

(2) Having a set of one or more ICs, which may optionally also include storage means for storing data and/or instructions;

(3) An ASIC, such as a modem (MSM);

(4) Modules that may be embedded within other devices;

(5) Receivers, terminals, smart terminals, cellular telephones, wireless devices, handsets, mobile units, vehicle devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6) Others, and so on.

Fig. 21 provides a schematic structural diagram of a terminal device. The terminal device may be adapted to the scenario shown in fig. 4 or fig. 13. For convenience of explanation, fig. 21 shows only main components of the terminal device. As shown in fig. 21, the terminal device 2100 includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly used for processing the communication protocol and the communication data, controlling the whole terminal, executing the software program and processing the data of the software program. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the terminal equipment is started, the processor can read the software program in the storage unit, analyze and execute the instructions of the software program and process the data of the software program. When data is required to be transmitted wirelessly, the processor carries out baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal device, the radio frequency circuit receives a radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and processes the data.

For ease of illustration, fig. 21 shows only one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or storage device, etc., and embodiments of the present invention are not limited in this respect.

As an alternative implementation manner, the processor may include a baseband processor, which is mainly used for processing the communication protocol and the communication data, and a central processor, which is mainly used for controlling the whole terminal device, executing a software program, and processing the data of the software program. The processor in fig. 21 integrates the functions of a baseband processor and a central processing unit, and those skilled in the art will appreciate that the baseband processor and the central processing unit may be separate processors, interconnected by bus technology, etc. Those skilled in the art will appreciate that the terminal device may include multiple baseband processors to accommodate different network formats, and that the terminal device may include multiple central processors to enhance its processing capabilities, and that the various components of the terminal device may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, which is executed by the processor to realize the baseband processing function.

In one example, an antenna and a control circuit having a transmission/reception function may be regarded as the transmission/reception unit 2111 of the terminal device 2100, and a processor having a processing function may be regarded as the processing unit 2112 of the terminal device 2100. As shown in fig. 21, the terminal device 2100 includes a transceiver unit 2111 and a processing unit 2112. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. Alternatively, a device for realizing a receiving function in the transceiver unit 2111 may be regarded as a receiving unit, and a device for realizing a transmitting function in the transceiver unit 2111 may be regarded as a transmitting unit, i.e., the transceiver unit 2111 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitting circuit, etc. Alternatively, the receiving unit and the transmitting unit may be integrated together, or may be a plurality of independent units. The receiving unit and the transmitting unit may be located in one geographical location or may be distributed among a plurality of geographical locations.

As shown in FIG. 22, a further embodiment of the present application provides an apparatus 2200. The device may be a terminal or a component of a terminal (e.g., an integrated circuit, a chip, etc.). The apparatus may also be a network device or a component of a network device (e.g., an integrated circuit, chip, etc.). The device may also be other communication modules for implementing the method according to the embodiments of the method of the present application. The apparatus 2200 may include: the processing module is used for: 2202 (processing unit). Optionally, a transceiver module 2201 (transceiver unit) and a memory module 2203 (memory unit) may also be included.

In one possible design, one or more modules as in FIG. 22 may be implemented by one or more processors or by one or more processors and memory; or by one or more processors and transceivers; or by one or more processors, memory, and transceivers, to which embodiments of the application are not limited. The processor, the memory and the transceiver can be arranged separately or integrated.

The device has the function of realizing the terminal equipment described in the embodiment of the application, for example, the device comprises a module or a unit or a means (means) corresponding to the steps involved in the terminal equipment described in the embodiment of the application, and the function or the unit or the means (means) can be realized by software, or realized by hardware, or realized by executing corresponding software by hardware, or realized by a mode of combining software and hardware. Reference is further made in detail to the corresponding description in the foregoing corresponding method embodiments.

Or the device has the function of implementing the network device described in the embodiment of the present application, for example, the device includes a module or a unit or means (means) corresponding to the steps involved in the network device described in the embodiment of the present application when the network device executes the network device, where the function or the unit or means (means) may be implemented by software, or implemented by hardware, or implemented by executing corresponding software by hardware, or implemented by a combination of software and hardware. Reference is further made in detail to the corresponding description in the foregoing corresponding method embodiments.

Alternatively, each module in the apparatus 2200 in the embodiment of the present application may be used to perform the method described in fig. 2, 16, or 17 in the embodiment of the present application.

In one possible implementation, an apparatus 2200 may comprise: a processing module 2202, configured to generate a first demodulation reference signal DMRS; the transceiver module 2201 is configured to send the first DMRS, where the first DMRS is configured to demodulate first side uplink information in a first time domain resource; the processing module 2202 is further configured to generate a second DMRS, and the transceiver module 2201 is further configured to send the second DMRS, where the second DMRS is configured to demodulate second side uplink information in a second time domain resource; wherein the first DMRS and the second DMRS are located in the same time unit, and the first time domain resource and the second time domain resource do not overlap in time.

Optionally, the first time domain resource is further used for carrying uplink information.

Optionally, the first side-link information includes side-link control information and first side-link data information, and the second side-link information includes second side-link data information; the first DMRS is configured to demodulate the side-link control information and/or the first side-link data information, and the second DMRS is configured to demodulate the second side-link data information.

Optionally, the side-link control information is used to schedule transmission of the first side-link data information and transmission of the second side-link data information.

Optionally, the transceiver module 2201 is further configured to: and sending first indication information, wherein the first indication information is used for indicating the first time domain resource and/or the second time domain resource.

Optionally, the transceiver module 2201 is further configured to: and sending second indication information, wherein the second indication information is used for indicating the position of the first DMRS and/or the position of the second DMRS.

In another possible embodiment, an apparatus 2200 may comprise:

a transceiver module 2201, configured to receive a first demodulation reference signal DMRS, where the first DMRS is configured to demodulate first side uplink information in a first time domain resource; the transceiver module 2201 is further configured to receive a second DMRS, where the second DMRS is configured to demodulate second side uplink information in a second time domain resource; a processing module 2202 configured to demodulate the first side uplink information in the first time domain resource according to the first DMRS and demodulate the second side uplink information in the second time domain resource according to the second DMRS; wherein the first DMRS and the second DMRS are located in the same time unit, and the first time domain resource and the second time domain resource do not overlap in time.

Optionally, the transceiver module 2201 is further configured to: and receiving first indication information, wherein the first indication information is used for indicating the first time domain resource and/or the second time domain resource.

Optionally, the transceiver module 2201 is further configured to: and receiving second indication information, wherein the second indication information is used for indicating the position of the first DMRS and/or the position of the second DMRS.

Since the apparatus 2200 may transmit the first DMRS for demodulating the first side link information in the first time domain resource and the second DMRS for demodulating the second side link information in the second time domain resource in the same time unit, the side link information in the two time domain resources that are not overlapped in the time domain may be received and demodulated using different DMRS, so that the transmission performance on the side link may be improved.

It can be understood that some optional features of the embodiments of the present application may be implemented independently in some scenarios, independent of other features, such as the scheme on which they are currently based, so as to solve corresponding technical problems, achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the device provided in the embodiment of the present application may also implement these features or functions accordingly, which will not be described herein.

Those of skill in the art will further appreciate that the various illustrative logical blocks (illustrative logical block) and steps (step) described in connection with the embodiments of the present application may be implemented by electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art may implement the described functionality in varying ways for each particular application, but such implementation is not to be understood as beyond the scope of the embodiments of the present application.

It should be appreciated that the processor in embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

The techniques described herein may be implemented by various means. For example, these techniques may be implemented in hardware, software, or a combination of hardware. For a hardware implementation, the processing units used to perform these techniques at a communication device (e.g., a base station, terminal, network entity, or chip) may be implemented in one or more general purpose processors, DSPs, digital signal processing devices, ASICs, programmable logic devices, FPGAs, or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combinations thereof. A general purpose processor may be a microprocessor, but in the alternative, the general purpose processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The application also provides a computer readable medium having stored thereon a computer program which when executed by a computer performs the functions of any of the method embodiments described above.

The application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments are not necessarily referring to the same embodiments throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It should also be understood that, in the present application, "when.+ -.)," if "and" if "all refer to that the UE or the base station will make the corresponding processing under some objective condition, and are not limited in time, nor do they require that the UE or the base station must have a judgment action when it is implemented, nor are they meant to have other limitations.

Those of ordinary skill in the art will appreciate that: the first, second, etc. numbers referred to in the present application are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application, but also to indicate the sequence.

Elements referred to in the singular are intended to be used in the present disclosure as "one or more" rather than "one and only one" unless specifically stated otherwise. In the present application, "at least one" is intended to mean "one or more" and "a plurality" is intended to mean "two or more" unless specifically indicated.

In addition, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: there are three cases where a alone exists, where a may be singular or plural, and where B may be singular or plural, both a and B exist alone.

The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "or" at least one of the terms "or" herein means all or any combination of the listed items, e.g., "at least one of A, B and C" may mean: there are six cases where a alone, B alone, C alone, a and B together, B and C together, A, B and C together, where a may be singular or plural, B may be singular or plural, and C may be singular or plural.

It should be understood that in embodiments of the present application, "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

The correspondence relation shown in each table in the application can be configured or predefined. The values of the information in each table are merely examples, and may be configured as other values, and the present application is not limited thereto. In the case of the correspondence between the configuration information and each parameter, it is not necessarily required to configure all the correspondence shown in each table. For example, in the table of the present application, the correspondence relation shown by some rows may not be configured. For another example, appropriate morphing adjustments, e.g., splitting, merging, etc., may be made based on the tables described above. The names of the parameters indicated in the tables may be other names which are understood by the communication device, and the values or expressions of the parameters may be other values or expressions which are understood by the communication device. When the tables are implemented, other data structures may be used, for example, an array, a queue, a container, a stack, a linear table, a pointer, a linked list, a tree, a graph, a structure, a class, a heap, a hash table, or a hash table.

Predefined in the present application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-sintering.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The same or similar parts may be referred to each other in the various embodiments of the application. In the embodiments of the present application, and the respective implementation/implementation methods in the embodiments, if there is no specific description and logic conflict, terms and/or descriptions between different embodiments, and between the respective implementation/implementation methods in the embodiments, may be consistent and may refer to each other, and technical features in the different embodiments, and the respective implementation/implementation methods in the embodiments, may be combined to form a new embodiment, implementation, or implementation method according to their inherent logic relationship. The embodiments of the present application described above do not limit the scope of the present application.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, the method comprising:

a first terminal device generates a first demodulation reference signal (DMRS) and transmits the first DMRS, wherein the first DMRS is used for demodulating first side uplink information in a first time domain resource;

the first terminal equipment generates a second DMRS and sends the second DMRS, wherein the second DMRS is used for demodulating second side uplink information in a second time domain resource;

the first DMRS and the second DMRS are located in the same time unit, the first time domain resource and the second time domain resource do not overlap in time, and the first time domain resource is further used for bearing uplink information;

the first terminal device transmits side-link information including the first side-link information and the second side-link information, the transmission power of the side-link information being constant in the time unit, and the side-link information and the uplink information sharing one transmission channel.

2. The method of claim 1, wherein the first side-link information comprises side-link control information and first side-link data information, and the second side-link information comprises second side-link data information;

The first DMRS is configured to demodulate the side-link control information and/or the first side-link data information, and the second DMRS is configured to demodulate the second side-link data information.

3. The method of claim 2, wherein the side-link control information is used to schedule transmission of the first side-link data information and transmission of the second side-link data information.

4. The method according to claim 1, wherein the method further comprises:

the first terminal device sends first indication information, wherein the first indication information is used for indicating the first time domain resource and/or the second time domain resource.

5. The method according to any one of claims 1 to 4, further comprising:

the first terminal device sends second indication information, wherein the second indication information is used for indicating the position of the first DMRS and/or the position of the second DMRS.

6. A method of communication, the method comprising:

the method comprises the steps that a second terminal device receives a first demodulation reference signal (DMRS) from a first terminal device, wherein the first DMRS is used for demodulating first side uplink information in a first time domain resource;

The second terminal device receives a second DMRS from the first terminal device, where the second DMRS is configured to demodulate second side uplink information in a second time domain resource;

7. The method of claim 6, wherein the first side-link information comprises side-link control information and first side-link data information, and the second side-link information comprises second side-link data information;

8. The method of claim 7, wherein the side-link control information is used to schedule transmission of the first side-link data information and transmission of the second side-link data information.

9. The method of claim 6, wherein the method further comprises:

the second terminal equipment receives first indication information, wherein the first indication information is used for indicating the first time domain resource and/or the second time domain resource.

10. The method according to any one of claims 6 to 9, further comprising:

the second terminal device receives second indication information, where the second indication information is used to indicate the position of the first DMRS and/or the position of the second DMRS.

11. A communication device, characterized in that the device is adapted to perform the method according to any of claims 1 to 5.

12. A communication device, characterized in that the device is adapted to perform the method according to any of claims 6 to 10.

13. A communication device, comprising: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any one of claims 1 to 5.

14. A communication device, comprising: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 6 to 10.

15. A computer readable storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any of claims 1 to 5.

16. A computer readable storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any of claims 6 to 10.

17. A communication system, comprising: the apparatus as claimed in claim 11 and/or the apparatus as claimed in claim 12.

18. A communication system, comprising: the apparatus as claimed in claim 13 and/or the apparatus as claimed in claim 14.