WO2018126777A1

WO2018126777A1 - Pdsch resource determining method and apparatus, terminal, base station, and storage medium

Info

Publication number: WO2018126777A1
Application number: PCT/CN2017/108732
Authority: WO
Inventors: 张晨晨; 郝鹏; 毕峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-01-03
Filing date: 2017-10-31
Publication date: 2018-07-12
Also published as: CN108270514A

Abstract

The present invention provides a PDSCH resource determining method and apparatus, terminal, and base station; said method comprises: obtaining first indication information used for indicating a physical downlink control channel (PDCCH) resource used for PDSCH transmission in a PDCCH domain; according to said indication information, determining a PDCCH resource used for PDSCH transmission in the PDCCH domain in a first time unit. Also provided by the embodiments of the present invention is a computer storage medium.

Description

PDSCH resource determining method and device, terminal, base station and storage medium

The present application is filed on the basis of the Chinese Patent Application No. PCT Application Serial No.

Technical field

The present invention relates to the field of wireless communications, and in particular, to a method and device for determining a PDSCH resource, a terminal, and a base station.

Background technique

With the development of wireless communication technology and the increasing demand for communication by users, in order to meet the needs of higher, faster and newer communication, the fifth generation mobile communication (5th Generation, 5G) technology has become the trend of future network development.

In the existing Long-Term Evolution (LTE) technology, the downlink downlink transmission channel (Physical Downlink Control CHannel, PDCCH for short) and the downlink downlink channel (Physical Downlink Shared Channel) In the PDSCH) domain, the downlink control channel domain occupies the entire system bandwidth in the frequency domain. In the time domain, the physical control format indicator channel (PCFICH) is used to dynamically indicate the first few symbols of the occupied subframe. When the Downlink Control Information (DCI) is carried, the aggregation level of the Control Channel Element (CCE) can be selected. There are multiple candidates available for each CCE aggregation level. Each candidate contains a CCE corresponding to the number of aggregation levels. The channel structure design of the Time Division Multiplex (TDM) mode may not be sufficient for the 5G system, so higher spectral efficiency, more flexible resource multiplexing, and smaller processing. Delay, which needs further resolution technical problem.

Summary of the invention

The embodiments of the present invention provide a method, a device, a terminal, and a base station for determining a PDSCH resource, and at least one of technical problems such as low spectrum utilization efficiency, multiplexing mode flexibility, or processing delay is expected to be solved.

According to an embodiment of the present invention, a method for determining a physical downlink shared channel (PDSCH) resource includes: obtaining first indication information for indicating a PDCCH resource for PDSCH transmission in a physical downlink control channel PDCCH region; The information determines a PDCCH resource for PDSCH transmission in the PDCCH domain within the first time unit.

According to an embodiment of the present invention, a method for determining a physical downlink shared channel (PDSCH) resource includes: obtaining first indication information for indicating a PDCCH resource for PDSCH transmission in a physical downlink control channel PDCCH region; Transmitting the first indication information, where the first indication information is used by the terminal to determine a PDCCH resource used for PDSCH transmission in the PDCCH domain in the first time unit.

According to an embodiment of the present invention, a device for determining a physical downlink shared channel (PDSCH) resource includes: an acquiring module, configured to acquire a first PDCCH resource for indicating a PDSCH transmission in a physical downlink control channel PDCCH region And the sending module is configured to send the first indication information to the terminal, where the first indication information is used by the terminal to determine the PDCCH resource used for the PDSCH transmission in the PDCCH domain in the first time unit.

According to yet another embodiment of the present invention, a computer storage medium is also provided. The storage medium is set as a computer executable instruction; after the computer executable instruction is executed, the method for determining the PDSCH resource provided by the foregoing one or more technical solutions can be implemented.

The PDCCH resource for the PDSCH transmission in the PDCCH domain may be determined according to the first indication information, because the terminal may receive the first indication information for indicating the PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH domain. That can pass The manner of the first indication information indicates the PDSCH resource multiplexed in the PDCCH domain. Therefore, the redundant spectrum resources in the PDCCH domain can be multiplexed into PDSCH resources for the PDSCH configuration, that is, the transmission of the PDSCH information, which obviously avoids waste of redundant spectrum resources in the PDCCH domain, thereby improving the effective utilization of the spectrum resources. The resource multiplexing in the PDCCH domain is implemented, and the multiplexing mode is more flexible. Since the PDSCH information can be transmitted by using the resources in the PDCCH domain, the PDSCH can be received from the PDSCH without waiting for the time corresponding to the PDCCH domain to elapse. The information improves the transmission and reception efficiency of the PDSCH information, thereby reducing the PDSCH transmission delay, and thus can solve at least one of the technical problems of low spectrum utilization efficiency, multiplexing mode flexibility, or processing delay in the related art.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a block diagram showing a hardware structure of a mobile terminal for determining a PDSCH resource according to an embodiment of the present invention;

2 is a flowchart 1 of a method for determining a PDSCH resource according to an embodiment of the present invention;

FIG. 3 is a second flowchart of a method for determining a PDSCH resource according to an embodiment of the present invention;

4 is a structural block diagram 1 of a device for determining PDSCH resources according to an embodiment of the present invention;

5 is a structural block diagram 2 of a device for determining PDSCH resources according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a PDCCH domain search space according to an embodiment of the present invention; FIG.

FIG. 9 is a diagram showing search spaces corresponding to UE1 and UE2 respectively according to an embodiment of the present invention. intention;

FIG. 10 is a schematic diagram of a PDCCH domain and a PDSCH domain before multiplexing according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic diagram of a multiplexed PDCCH region and a PDSCH region according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a PDCCH domain and a PDSCH domain before multiplexing according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a PDCCH domain and a PDSCH domain after multiplexing according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. In some embodiments, the embodiments of the present application and the features of the embodiments may be combined with each other without conflict.

In some embodiments, the terms "first", "second", etc. in the specification and claims of the present invention and the above figures are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. .

In order to achieve high-efficiency spectrum utilization, in the communication technology, it is necessary to consider the combination of TDM and Frequency Division Multiplexing (FDM) to implement resource multiplexing between PDCCH and PDSCH. For the TDM mode, the current mainstream mode is to transmit the PDCCH on one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols of one scheduling time unit, and the remaining OFDM symbols can transmit downlink or uplink. The service data, that is, the PDSCH or the physical uplink shared channel (PUSCH), or both. If it is a simple TDM mode, the OFDM symbols transmitting the PDCCH can only be wasted if there are resources remaining, and in order to avoid such waste, the remaining resources can be used for PDSCH transmission, that is, the OFDM symbol of the PDCCH is transmitted. Multiplexing PDCCH and FDM PDSCH. For the multiplexing mode of the TDM+FDM, the resource block assignment field in the downlink DCI format in the legacy LTE indicates the frequency domain resource occupied by the PDSCH of a user on the non-PDCCH symbol, and in view of this, In the embodiment of the present invention, the communication partner (for example, the base station on the network side and/or the terminal on the terminal side) first acquires indication information indicating the PDCCH resource in the PDCCH domain of the user PDSCH transmission, and then performs PDSCH information transmission based on the indication information. . By indicating the interaction of the information, the two parties are aware of the PDCCH resources multiplexed by the PDSCH, so that the remaining PDCCH resources are used for the transmission of the PDSCH information, the waste of the PDCCH resources is reduced, and the effective utilization of the spectrum is improved, and the A multiplexing mode of the PDCCH resource, and now, after waiting for the PDCCH resource to complete the transmission of the PDCCH information, the PSDCH resource is transmitted by using a dedicated PSDCH resource other than the PDCCH resource, and the transmission time of the PSDCH information is advanced as a whole, thereby reducing the transmission of the PSDCH. Delay, with a smaller transmission delay.

The method embodiment provided in Embodiment 1 of the present application can be executed in a mobile terminal, a computer terminal or the like. Taking a mobile terminal as an example, FIG. 1 is a hardware structural block diagram of a mobile terminal for determining a physical downlink shared channel PDSCH resource according to an embodiment of the present invention. As shown in FIG. 1, the mobile terminal 10 may include one or more (only one shown) processor 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA). A memory 104 for storing data, and a transmission device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in FIG. 1 is merely illustrative and does not limit the structure of the above electronic device. For example, the mobile terminal 10 may also include more or fewer components than those shown in FIG. 1, or have a different configuration than that shown in FIG.

The memory 104 can be configured as a software program and a module for storing application software, such as program instructions/modules corresponding to the method for determining the physical downlink shared channel PDSCH resource in the embodiment of the present invention, and the processor 102 runs the software program stored in the memory 104. And the module, thereby performing various functional applications and data processing, that is, implementing the above method. The memory 104 can include high speed Random access memory may also include non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 104 may further include memory remotely located relative to processor 102, which may be connected to mobile terminal 10 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 106 is for receiving or transmitting data via a network. The above-described network specific example may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module for communicating with the Internet wirelessly. The radio frequency module may include: an antenna, a modulator, and/or a demodulator, and the like, which may be used for transceiving, modulating, and demodulating operations of a wireless signal, thereby implementing wireless communication.

In this embodiment, a method for determining a physical downlink shared channel (PDSCH) resource of the mobile terminal is provided. FIG. 2 is a flowchart 1 of a method for determining a physical downlink shared channel (PDSCH) resource according to an embodiment of the present invention. As shown in 2, the process includes the following steps:

Step S202, acquiring first indication information for indicating a PDCCH resource for PDSCH transmission in a physical downlink control channel PDCCH domain;

Step S204, determining, according to the indication information, a PDCCH resource used for PDSCH transmission in the PDCCH domain in the first time unit.

The PDCCH resource for the PDSCH transmission in the PDCCH domain may be determined according to the first indication information, because the terminal may receive the first indication information that is used to indicate the PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH domain. That is, the PDSCH resource multiplexed in the PDCCH domain may be indicated by the first indication information, and thus the problem that the PDSCH resource multiplexed on the PDCCH symbol cannot be indicated to the terminal in the related art may be solved.

In some embodiments, the first time unit may include: one or more scheduling time units, wherein, in a case where the first time unit includes a plurality of scheduling time units, the plurality of scheduling time units are discrete or continuously.

In some embodiments, the PDCCH domain described above may include one or more orthogonal frequency division multiplexing OFDM symbols for PDCCH transmission. The OFDM symbol may be an OFDM symbol located in one or more of the scheduled time units.

The first indication information may be displayed in an implicit manner. In an embodiment of the present invention, the indication is performed by using a display manner. The step S202 may be specifically performed as: receiving downlink control information DCI; The DCI includes: an indication field for indicating a PDCCH resource for PDSCH transmission in the PDCCH domain. That is, the first indication information is carried by adding the indication field in the DCI.

In some embodiments, the above indication field may be one or more fields, but is not limited thereto. For example, the field may be a resource identifier indicating the PDCCH resource used for the PSDCH resource, and the resource identifier may include: a frequency band identifier, a time identifier, and the like.

In some embodiments, the indication field may be used to indicate a candidate for a PDSCH transmission in a specified candidate set of a PDCCH domain, where the candidate set is a candidate set for an aggregation level or a subset of a candidate set, and a candidate in the candidate set is specified. Used for PDSCH transmission when no PDCCH is required for transmission.

In some embodiments, the foregoing candidate set may be divided into two types: a first type candidate and a second type candidate, wherein the first type candidate is a PDCCH dedicated candidate, and can only be used for PDCCH transmission, and is not applicable to the PDSCH. The second type of candidate is a PDSCH candidate, which can be used for both PDCCH transmission and PDSCH transmission, but is preferentially used for PDCCH transmission, and is used for PDSCH transmission when no PDCCH needs to be transmitted.

In some embodiments, the specified candidate set is the second type candidate, but is not limited thereto.

In some embodiments, the above candidate set may be all search spaces corresponding to the aggregation level. Or a subset of all search spaces.

In some embodiments, the above set refers to a set of control channel basic resource elements, which may be an aggregation of CCEs or REGs or PRBs or other basic search spaces.

The above aggregation level may include at least one of the following: a collection of all aggregation levels; a collection of partial aggregation levels; and an aggregation level.

In some embodiments, the foregoing candidate set is at least one of: a total search space corresponding to the time-frequency resource occupied by the entire PDCCH; a partial search space corresponding to the PDCCH occupying the time-frequency resource in the specified beam direction; and a partial search corresponding to the specified search space type The space; wherein the specified search space type comprises at least one of the following: a common search space, a dedicated search space, a group search space, wherein the group search space is a search space that shares a DCI for a group of terminals.

In some embodiments, all search spaces, the time domain corresponds to one or more OFDM symbols, and the frequency domain corresponds to one or more PRB sets; the partial search space, the time domain corresponds to one, multiple or 1/n OFDM symbols, n is a positive integer, and the frequency domain corresponds to a PRB Set or a subset of a PRB Set.

In an embodiment of the present invention, the indication field may include the same number of bits as the number of candidates included in the specified candidate set. Therefore, the candidate for the PDSCH transmission in the specified candidate set of the PDCCH domain can be indicated by the bitmap bitmap method.

In some embodiments, when the bit in the indication domain is the first specified value, indicating that the candidate corresponding to the bit in the specified candidate set is used for PDSCH transmission; when the bit is the second specified value, indicating that the specified candidate set is The candidates corresponding to the bits are not used for PDSCH transmission. In some embodiments, the first specified value may be 0 or 1, and the second specified value may be 1 or 0, but is not limited thereto.

In some embodiments, the aggregation level corresponding to the specified candidate set may be an aggregation level corresponding to the candidate set, or the aggregation level corresponding to the specified candidate set is a subset of the aggregation level corresponding to the candidate set, but Not limited to this.

In some embodiments, the aggregation level corresponding to the specified candidate set may be determined by at least one of the following: radio resource control RRC signaling configuration; system information block SIB or system information SI semi-static configuration; specified protocol specification; according to current scheduling time Whether the base station in the unit determines the detection result of the PDCCH that the terminal has transmitted; wherein, in the case that the PDCCH is sent to the terminal, the aggregation level of the specified candidate set is the same as the aggregation level used by the base station to send the PDCCH, and the detection result is When the PDCCH is not sent to the terminal, the aggregation level of the specified candidate set is the default aggregation level.

In an embodiment of the present invention, the indication is performed in an implicit manner, and the foregoing step S202 may be performed by: detecting whether the base station carries the DCI or the effective control channel in the predetermined search space, and obtains the detection result; wherein, the detection result is In the case that the predetermined search space carries the DCI or the effective control channel, it indicates that the PDCCH domain is used for PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.

In some embodiments, where the second indication information indicates that the predetermined search space does not carry a DCI or a valid control channel, indicating that the PDCCH domain is not used for PDCCH transmission.

In some embodiments, the predetermined search space may be a search space corresponding to one or more control channel basic resource units. Specifically, on the time-frequency resource, the time domain may correspond to one or more OFDM symbols, and the frequency domain may correspond to one PRB Set or a subset of PRB Sets, that is, multiple consecutive or discrete PRBs.

In some embodiments, the search space may include at least one of the following: a common search space, a group search space; wherein the group search space is a search space in which a group of terminals share a DCI.

The above predetermined search space is one OFDM symbol or one OFDM symbol group in the time domain dimension, corresponding to one beam direction. Different OFDM symbols or groups of OFDM symbols may correspond to the same or different OFDM directions.

In an embodiment of the present invention, after step S204, the method may further include: determining whether to transmit the PDSCH of the terminal on the predetermined search space.

Optionally, determining whether the PDSCH of the transmitting terminal on the predetermined search space may be expressed as: blindly detecting the PDCCH on other candidate or other search spaces other than the predetermined search space; detecting that the base station sends the DCI to the terminal itself, and in the DCI In the case that the resource allocation indication field is included, the frequency domain resource indicated by the resource allocation indication field is intersected with the frequency domain resource corresponding to the predetermined search space according to the resource allocation rule of the predetermined search space transmission PDSCH, to obtain the first frequency domain resource; The resource allocation rule includes: allocating frequency domain resources corresponding to the predetermined search space to the corresponding terminal according to the frequency domain resource allocation result of the PDSCH domain; determining that the base station transmits on the time-frequency resource corresponding to the first frequency domain resource in the predetermined search space. The PDSCH of the terminal.

In some embodiments, the first frequency domain resource refers to a frequency domain dimension, and does not include a time domain dimension, where a time domain dimension of the time domain resource of the first frequency domain resource corresponds to all OFDM symbols included in the predetermined search space or The part of the OFDM symbol, the frequency domain dimension of the time domain resource of the first frequency domain resource corresponds to the first time-frequency resource.

Optionally, the execution body of the foregoing steps may be a terminal or the like, but is not limited thereto.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The embodiment of the present invention further provides a method for determining a physical downlink shared channel (PDSCH) resource, and FIG. 3 is a second flowchart of a method for determining a physical downlink shared channel (PDSCH) resource according to an embodiment of the present invention. Methods include:

Step S302, the acquiring is used to indicate the physical downlink control channel in the PDCCH domain for the PDSCH. First indication information of the transmitted PDCCH resource;

Step S304, the first indication information is sent to the terminal, where the first indication information is used by the terminal to determine a PDCCH resource used for PDSCH transmission in the PDCCH domain in the first time unit.

Through the foregoing steps, the PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH region of the terminal may be notified by using the foregoing first indication information, so that the problem that the PDSCH resource multiplexed on the PDCCH symbol cannot be indicated to the terminal in the related art may be solved.

In some embodiments, the first time unit may include: one or more scheduling time units, wherein, in a case where the first time unit includes a plurality of scheduling time units, the plurality of scheduling time units are discrete or continuously. The above PDCCH domain may include one or more orthogonal frequency division multiplexing OFDM symbols for PDCCH transmission. The OFDM symbol may be an OFDM symbol located in one or more of the scheduled time units.

The first indication information may be displayed in an implicit manner. In an embodiment of the present invention, the indication may be performed by using a display manner, where the first indication information may include: downlink control information. The DCI; wherein the DCI includes: an indication field for indicating a PDCCH resource for the PDSCH transmission in the PDCCH domain. That is, the first indication information is carried by adding the indication field in the DCI.

In some embodiments, the above indication field may be a field, but is not limited thereto.

In some embodiments, the foregoing candidate set may be divided into two types: a first type candidate and a second type candidate, wherein the first type candidate is a PDCCH dedicated candidate, and can only be used for PDCCH transmission, and is not applicable to the PDSCH. Transmission; the second type of candidate is a PDSCH candidate candidate, which can be used for both PDCCH transmission and PDSCH transmission, but is preferentially used for The PDCCH transmission is used for PDSCH transmission when there is no PDCCH to transmit.

In some embodiments, the candidate set described above may be all search spaces of the corresponding aggregation level or a subset of all search spaces.

In an embodiment of the present invention, the indication is performed in an implicit manner, where the first indication information includes: whether the base station carries the DCI or the effective control channel in the predetermined search space; wherein, in the predetermined search space, When the DCI or the effective control channel is carried, it indicates that the PDCCH domain is used for PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource. That is, whether the PDCCH domain is used for PDCCH transmission by the base station whether the DCI or the effective control channel is carried in the predetermined search space, and if used, the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.

In an embodiment of the present invention, before the step S302, the method may further include: allocating a frequency domain resource corresponding to the predetermined search space to the corresponding terminal according to the resource allocation rule; wherein the resource allocation rule comprises: according to the PDSCH domain The frequency domain resource allocation result allocates the frequency domain resource corresponding to the predetermined search space to the corresponding terminal. The frequency domain resource allocation is allocated by the resource allocation rule to ensure that the frequency domain resource allocation corresponding to the predetermined search space is consistent with the frequency domain resource allocation result of the PDSCH domain, or the frequency domain resource allocation corresponding to the predetermined search space is the frequency domain resource allocation of the PDSCH domain. a subset of.

In an embodiment of the present invention, when there are multiple frequency domain resource allocation results in the time division multiplexing TDM mode in the PDSCH domain, the foregoing method may further include: selecting one frequency from multiple frequency domain resource allocation results. As a result of the domain resource allocation, the PDSCH resource is determined for each OFDM symbol or each OFDM symbol group according to a resource allocation rule. That is, in the case where there are multiple frequency domain resource allocation results, it is necessary to refer to one of the frequency domain resource allocation results for resource allocation.

Optionally, the execution body of the foregoing step may be a base station or the like, but is not limited thereto.

In this embodiment, a device for determining a physical downlink shared channel PDSCH resource is further provided. The device is used to implement the above embodiments and preferred embodiments, and the description thereof has been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

4 is a structural block diagram 1 of a device for determining a physical downlink shared channel PDSCH resource according to an embodiment of the present invention. As shown in FIG. 4, the device includes:

The obtaining module 42 is configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

The determining module 44 is connected to the obtaining module 42, and configured to determine, according to the indication information, a PDCCH resource used for PDSCH transmission in the PDCCH domain in the first time unit.

The PDCCH resource for the PDSCH transmission in the PDCCH domain may be determined according to the first indication information, because the first indication information for indicating the PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH domain may be received by using the foregoing apparatus, That is, the PDSCH resource multiplexed in the PDCCH domain can be indicated by the first indication information, and thus the problem that the PDSCH resource multiplexed on the PDCCH symbol cannot be indicated to the terminal in the related art can be solved.

In some embodiments, the PDCCH domain described above may include one or more orthogonal frequency division multiplexing OFDM symbols for PDCCH transmission.

The foregoing indication information may be displayed in an implicit manner. In an embodiment of the present invention, the indication is performed by using a display manner. Specifically, the obtaining module 42 may further be configured to receive the downlink control. Information DCI; wherein the DCI includes: an indication field for indicating a PDCCH resource for PDSCH transmission in the PDCCH domain.

In an embodiment of the present invention, the indication is performed in an implicit manner. Optionally, the obtaining module 42 is further configured to detect whether the base station carries the DCI or the effective control channel in the predetermined search space, and obtains the detection result. If the detection result is that the DCI or the effective control channel is carried in the predetermined search space, the PDCCH domain is used for the PDCCH transmission, and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.

In some embodiments, where the second indication information indicates that the predetermined search space does not carry a DCI or a valid control channel, indicating that the PDCCH domain is not multiplexed for PDCCH transmission.

In an embodiment of the present invention, the apparatus may further include: a determining module, connected to the determining module 44, configured to determine whether the PDSCH of the terminal is transmitted on the predetermined search space.

In some embodiments, the determining module may include: a blind detecting unit configured to blindly detect the PDCCH on other candidate or other search spaces other than the predetermined search space; and the processing unit configured to send the DCI to the terminal itself after detecting the base station And the resource allocation indication field is included in the DCI, and the frequency domain resource indicated by the resource allocation indication field is intersected with the frequency domain resource corresponding to the predetermined search space according to the resource allocation rule of the predetermined search space transmission PDSCH, to obtain the first frequency. The resource allocation rule includes: the frequency domain resource corresponding to the predetermined search space is allocated to the corresponding terminal according to the frequency domain resource allocation result of the PDSCH domain; and the determining unit is configured to determine that the base station corresponds to the first frequency in the predetermined search space. The PDSCH of the terminal is transmitted on the time-frequency resource of the domain resource.

Alternatively, the above device may be located in the terminal, but is not limited thereto.

In some embodiments, each of the foregoing modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are arbitrary. The combined forms are located in different processors.

In this embodiment, a device for determining a physical downlink shared channel (PDSCH) resource is provided. The device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

5 is a structural block diagram 2 of a device for determining a physical downlink shared channel (PDSCH) resource according to an embodiment of the present invention. As shown in FIG. 5, the device includes:

The obtaining module 52 is configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

The sending module 54 is connected to the acquiring module 52, and configured to send first indication information to the terminal, where the first indication information is used by the terminal to determine a PDCCH resource used for PDSCH transmission in the PDCCH domain in the first time unit.

The PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH region of the terminal may be notified by the foregoing apparatus, and the problem that the PDSCH resource multiplexed on the PDCCH symbol cannot be indicated to the terminal in the related art may be solved.

In some embodiments, the first time unit may include: one or more scheduling time units, wherein, in a case where the first time unit includes a plurality of scheduling time units, the plurality of scheduling time units are discrete or continuously. The above PDCCH domain may include one or more orthogonal frequency division multiplexing OFDM symbols for PDCCH transmission.

The first indication information may be displayed in an implicit manner. In an embodiment of the present invention, the indication may be performed by using a display manner, where the first indication information may include: downlink control information. DCI; among them, DCI includes: used to refer to An indication field indicating a PDCCH resource for PDSCH transmission in the PDCCH domain. That is, the first indication information is carried by adding the indication field in the DCI.

In some embodiments, all search spaces, the time domain corresponds to one or more OFDM symbols, The frequency domain corresponds to one or more PRB Sets; in the foregoing partial search space, the time domain corresponds to one, multiple or 1/n OFDM symbols, n is a positive integer, and the frequency domain corresponds to a PRB Set or a subset of a PRB Set.

In an embodiment of the present invention, the indication is performed in an implicit manner, where the first indication information includes: whether the base station carries a DCI or a valid control channel in a predetermined search space; wherein the bearer is carried in a predetermined search space. In the case of a DCI or a valid control channel, indicating that the PDCCH domain is used for PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is PDCCH resource. That is, whether the PDCCH domain is used for PDCCH transmission by the base station whether the DCI or the effective control channel is carried in the predetermined search space, and if used, the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.

In an embodiment of the present invention, the apparatus may further include: a first allocation module, configured to be connected to the obtaining module 52, configured to allocate a frequency domain resource corresponding to the predetermined search space to the corresponding terminal according to the resource allocation rule; The allocation rule includes: allocating frequency domain resources corresponding to the predetermined search space to the corresponding terminal according to the frequency domain resource allocation result of the PDSCH domain. The frequency domain resource allocation is allocated by the resource allocation rule to ensure that the frequency domain resource allocation corresponding to the predetermined search space is consistent with the frequency domain resource allocation result of the PDSCH domain, or the frequency domain resource allocation corresponding to the predetermined search space is the frequency domain resource allocation of the PDSCH domain. a subset of.

In an embodiment of the present invention, the foregoing apparatus may further include: a second allocation module, configured to be connected to the obtaining module 52, in the case that the PDSCH domain has multiple frequency domain resource allocation results in a time division multiplexing TDM manner, Selecting one of the frequency domain resource allocation results from the plurality of frequency domain resource allocation results, and for each OFDM symbol or each OFDM symbol according to the resource allocation rule The group determines the PDSCH resources. That is, in the case where there are multiple frequency domain resource allocation results, it is necessary to refer to one of the frequency domain resource allocation results for resource allocation.

Alternatively, the above device may be located in the base station, but is not limited thereto.

The embodiment of the present invention further provides a terminal. FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 6, the terminal includes:

The radio frequency module 62 is configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

The processor 64 is connected to the radio frequency module 62, and is configured to determine, according to the indication information, a PDCCH resource used for PDSCH transmission in the PDCCH domain in the first time unit.

The PDCCH resource for the PDSCH transmission in the PDCCH domain may be determined according to the first indication information, by using the foregoing terminal, the first indication information that is used to indicate the PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH domain, That is, the PDSCH resource used in the PDCCH domain can be indicated by the first indication information, and thus the problem that the PDSCH resource used for the PDCCH symbol cannot be indicated to the terminal in the related art can be solved.

The first indication information may be displayed in an implicit manner. In an embodiment of the present invention, the indication is performed by using a display manner. Specifically, the radio frequency module 62 may further be configured to receive downlink control. Information DCI; among them, DCI includes: used to refer to An indication field indicating a PDCCH resource for PDSCH transmission in the PDCCH domain.

In an embodiment of the present invention, the indication is performed in an implicit manner. Optionally, the radio frequency module 62 is further configured to detect whether the base station carries the DCI or the effective control channel in the predetermined search space, and obtains the detection result. If the detection result is that the DCI or the effective control channel is carried in the predetermined search space, the PDCCH domain is used for the PDCCH transmission, and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.

In an embodiment of the present invention, the processor may be further configured to determine whether to transmit a PDSCH of the terminal on a predetermined search space; optionally, may also be used on other candidate or other search spaces other than the predetermined search space. Blindly detecting the PDCCH; when detecting that the base station sends the DCI to the terminal itself, and the DCI includes the resource allocation indication field, according to the resource allocation rule of the predetermined search space transmission PDSCH, the frequency domain resource indicated by the resource allocation indication field and the reservation The frequency domain resource corresponding to the search space is taken to obtain the first frequency domain resource, wherein the resource allocation rule includes: allocating the frequency domain resource corresponding to the predetermined search space to the corresponding terminal according to the frequency domain resource allocation result of the PDSCH domain; and determining The base station transmits the PDSCH of the terminal on the time-frequency resource corresponding to the first frequency domain resource in the predetermined search space.

Example 6

An embodiment of the present invention further provides a base station, and FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in FIG. 7, the method includes:

The processor 72 is configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

The radio frequency module 74 is connected to the processor 72 and configured to send the first indication information to the terminal. The first indication information is used by the terminal to determine the PDCCH resource used for the PDSCH transmission in the PDCCH domain in the first time unit.

The foregoing base station can notify the PDCCH resource for the PDSCH transmission in the PDCCH domain of the physical downlink control channel by using the first indication information, and thus can solve the problem that the PDSCH resource used for the PDCCH symbol cannot be indicated to the terminal in the related art.

In some embodiments, the above candidate set can be divided into two categories: a first class candidate and a second class. A class candidate, wherein the first type of candidate is a PDCCH-dedicated candidate, which can only be used for PDCCH transmission, and cannot be used for PDSCH transmission; the second type of candidate is a PDSCH candidate candidate, which can be used for both PDCCH transmission and PDSCH transmission. However, it is preferentially used for PDCCH transmission, and is used for PDSCH transmission when no PDCCH is required for transmission. In the embodiment, the absence of the PDCHH needs to be transmitted, and may include: there is no PDCCH information that needs to be transmitted, or the corresponding communication resource is not needed to configure the PDCCH. In order to improve the effective use of resources, the scheduling time unit in the candidate set is used for the PDSCH to transmit PDSCH information, thereby improving the effective utilization of resources.

In an embodiment of the present invention, the number of bits that the indication field can include and the designated candidate The number of candidates included in the set is the same. Therefore, the candidate for the PDSCH transmission in the specified candidate set of the PDCCH domain can be indicated by the bitmap bitmap method.

In an embodiment of the present invention, the indication is performed in an implicit manner, where the first indication information includes: whether the base station carries a DCI or a valid control channel in a predetermined search space; wherein the bearer is carried in a predetermined search space. In the case of the DCI or the effective control channel, the PDCCH domain is used for the PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource. That is, whether the PDCCH domain is used for PDCCH transmission by the base station whether the DCI or the effective control channel is carried in the predetermined search space, and if used, the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.

In some embodiments, the second indication information indicates that the DCI is not carried in the predetermined search space or In the case of a valid control channel, it indicates that the PDCCH domain is not used for PDCCH transmission.

In an embodiment of the present invention, the processor 72 may be further configured to allocate, according to a resource allocation rule, a frequency domain resource corresponding to a predetermined search space to a corresponding terminal, where the resource allocation rule includes: a frequency domain resource according to the PDSCH domain. The allocation result allocates the frequency domain resource corresponding to the predetermined search space to the corresponding terminal.

In an embodiment of the present invention, the processor 72 may be further configured to select one of multiple frequency domain resource allocation results in a case where the PDSCH domain has multiple frequency domain resource allocation results in a time division multiplexing TDM manner. As a result of the frequency domain resource allocation, the PDSCH resource is determined for each OFDM symbol or each OFDM symbol group according to a resource allocation rule.

Example 7

An embodiment of the present invention further provides a computer storage medium, which may be simply referred to as a storage medium, and stores computer executable code such as program code or computer software, and the computer executable code is executed to implement the foregoing application in a base station. A method of determining a PDSCH resource, or a method of determining a PDSCH resource to be applied in a terminal. Alternatively, in the present embodiment, the above storage medium may be configured to store a program for performing the steps of the method (such as the method shown in FIG. 2 and/or FIG. 3) in any one or more of the foregoing embodiments. Computer executable code such as code.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc. The computer storage medium can be selected as a non-transitory storage medium or a non-volatile storage medium.

Optionally, in the present embodiment, the processor performs the steps of the method of FIG. 2 or FIG. 3 according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

In order to better understand the embodiments of the present invention, the present invention is further explained in conjunction with the preferred embodiments.

Example 1:

For a certain PRB Set, the user who performs blind detection on the PRB Set has a number of CCEs in the search space, for example, 16 CCEs including CCE 0-CCE 15, and the supported CCE aggregation level is {1, 2, 4, 8, 16}, FIG. 8 is a schematic diagram of a PDCCH domain search space provided according to an example of the present invention, as shown in FIG.

Then, according to the search space range and the CCE aggregation level, for a certain DCI format, the number of blind detections by the user is 16+8+4+2+1=31 times, that is, the corresponding aggregation level is 1 CCE, and there are 16 candidates; If the aggregation level is 2 CCEs, there are 8 candidates; if the aggregation level is 4 CCEs, there are 4 candidates; if the aggregation level is 8 CCEs, there are 2 candidates; the corresponding aggregation level is 16 In the case of CCE, there is 1 candidate.

The protocol specifies a "PDCCH domain PDSCH resource indication" field in the DCI to indicate whether the PDCCH domain is multiplexed for PDSCH transmission, and which PDCCH resources are used for PDSCH transmission. The domain uses a 4-bit bitmap. for:

When the corresponding aggregation level is 1 CCE, the 4-bit bitmap is used to indicate 16 candidates. Whether the last 4 candidates or the first 4 candidates are used for PDSCH transmission indication, the lowest bit of 4 bits corresponds to the candidate with the smallest CCE index among the 4 candidates, and so on, the highest bit of 4 bits corresponds to 4 candidates. The candidate with the largest CCE index value, the corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not used for PDSCH transmission;

When the corresponding aggregation level is 2 CCEs, the 4-bit bitmap is used to indicate whether the last 4 candidates or the first 4 candidates in the 8 candidates are used for PDSCH transmission indication. The lowest bit of 4 bits corresponds to the start of 4 candidates. The candidate with the smallest CCE index, and so on, the highest bit of the 4 bits corresponds to the candidate with the largest CCE index value among the 4 candidates. The corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not Used for PDSCH transmission;

When the corresponding aggregation level is 4 CCEs, the 4-bit bitmap is used to indicate whether the four candidates are used for the PDSCH transmission indication. The lowest bit of the four bits corresponds to the candidate with the smallest CCE index in the four candidates, and so on. The highest bit in the bit corresponds to the candidate with the largest CCE index value among the four candidates, and the corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not used for the PDSCH transmission;

When the corresponding aggregation level is 8 CCEs, the last 2 bits of the 4-bit bitmap are reserved bits. The first 2 bits are used to indicate whether 2 candidates are used for PDSCH transmission indication. The lowest bit of 4 bits corresponds to 2 candidates. The candidate with the smallest CCE index, and so on, the upper 2 bits are reserved bits, the corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not used for PDSCH transmission;

When the corresponding aggregation level is 16 CCEs, the last 3 bits of the 4-bit bitmap are reserved bits, and the first bit is used to indicate whether one candidate is used for the PDSCH transmission indication, and the lowest bit of the four bits corresponds to one candidate. The upper 3 bits are reserved bits, corresponding to the bit position 1 Indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not used for PDSCH transmission.

The agreement may stipulate that the above five meanings are supported, or that only one of the above five types is supported, or that one of the above five types is supported.

If the protocol stipulates that only one of the above five types is supported, after the terminal blindly detects and decodes the DCI, the "PDCCH domain PDSCH resource indication" field is read, and it can be understood which candidate of the specific 4-bit candidate is used for the PDSCH. transmission.

If the protocol provides support for multiple or five of the above five types, then after the terminal blindly detects and decodes the DCI, it can determine which CCE aggregation level the base station sends to its DCI, assuming CCE aggregation level x, then The terminal parses the meaning of the 4-bit representation in the "PDCCH domain PDSCH resource indication" field according to the CCE aggregation level x.

The 16 CCEs in this embodiment constitute a search space, which is only an example, and is not limited to 16 CCEs.

The CCE aggregation level {1, 2, 4, 8, 16} in this embodiment is merely an example, and is not specifically limited thereto.

The 4-bit bitmap length in this embodiment is merely an example, and is not limited to 4 bits in detail.

Example 2:

The user can calculate the search space range of the blind detection PDCCH according to the RNTI information, the current time information, such as the Slot sequence number, the Subframe sequence number, or the frame sequence number, or other information configured by the RRC signaling, before the PDCCH is detected by the PDCCH. For different CCE aggregation levels, the search space ranges may be different or the same. Different users may have different or the same search space range for the same CCE aggregation level. As shown in FIG. 9, FIG. 9 is provided according to Example 2 of the present invention. Schematic diagram of the search space corresponding to UE1 and UE2 respectively, two users UE1 and UE2 served by the same base station, and the search space determined by UE1 in the current scheduling time unit is "UE1 search space" in FIG. 9, including CCE0-CCE15, UE2 The search space determined in the current scheduling time unit is "UE2 search space" in FIG. 9, and includes CCE6-CCE21. The protocol stipulates that all users support the CCE aggregation level of {1, 2, 4, 8, 16}. Although UE1 and UE2 have different search space ranges, based on their respective search spaces, the blind detection times are 16+ for a certain DCI format. 8+4+2+1=31 times, that is, the corresponding aggregation level is 1 CCE, there are 16 candidates; the corresponding aggregation level is 2 CCEs, there are 8 candidates; the corresponding aggregation level is 4 CCEs. In the case of 4 candidates, the corresponding aggregation level is 8 CCEs, there are 2 candidates; the corresponding aggregation level is 16 CCEs, and there is 1 candidate.

Defining a "PDCCH domain PDSCH resource indication" field in the DCI, indicating whether the PDCCH domain is multiplexed for PDSCH transmission, and specifically which PDCCH resources are multiplexed for PDSCH transmission, the domain adopts a 4-bit bitmap, the 4-bit The bitmap only indicates the search space of a specific UE, whether part of the candidate or all the candidates are used for the PDSCH transmission of the user.

When the corresponding aggregation level is 1 CCE, the 4-bit bitmap is used to indicate whether the last 4 candidates or the first 4 candidates in the 16 candidates are used for the PDSCH transmission indication. The lowest bit of the 4 bits corresponds to the CCE index of the 4 candidates. The smallest candidate, and so on, the highest bit of the 4 bits corresponds to the candidate with the largest CCE index value among the 4 candidates. The corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not used. PDSCH transmission;

When the corresponding aggregation level is 2 CCEs, the 4-bit bitmap is used to indicate whether the last 4 candidates or the first 4 candidates in the 8 candidates are used for PDSCH transmission indication. The lowest bit of 4 bits corresponds to the start of 4 candidates. The candidate with the smallest CCE index, and so on, the highest bit of the 4 bits corresponds to the candidate with the largest CCE index value among the 4 candidates, and the corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, the corresponding ratio The special position 0 indicates that the corresponding candidate is not used for PDSCH transmission;

When the corresponding aggregation level is 16 CCEs, the last 3 bits of the 4-bit bitmap are reserved bits, and the first bit is used to indicate whether one candidate is used for the PDSCH transmission indication, and the lowest bit of the four bits corresponds to one candidate. The upper 3 bits are reserved bits, the corresponding bit position 1 indicates that the corresponding candidate is transmitted by the user PDSCH, and the corresponding bit position 0 indicates that the corresponding candidate is not used for PDSCH transmission.

If the protocol provides support for multiple or five of the above five types, then after the terminal blindly detects and decodes the DCI, it can determine which CCE aggregation level the base station sends to its DCI, assuming CCE aggregation level x, then The terminal parses the PDCCH according to the CCE aggregation level x. The meaning of the 4-bit representation in the Domain PDSCH Resource Indication field.

For example, after the blind detection by the user 1 and the discovery that the base station transmits the DCI to the user 1, and the CCE aggregation level used is 2, the user 1 parses the 4-bit "PDCCH domain PDSCH resource indication" field in the DCI as: When the level is 2 CCEs, the last 4 candidates in 8 candidates, that is, the lowest bit indicates the 5th candidate, that is, the candidate corresponding to {CCE8CCE9}, whether it is used for PDSCH transmission, and the highest indicates the 8th candidate, that is, The corresponding certificate of {CCE14CCE15} is transmitted by the user PDSCH, and the middle 2 bits and so on. After decoding the DCI, the user 1 finds that the field is "1010", that is, the 6th and 8th candidates are used for PDSCH transmission, that is, {CCE10CCE11CCE14CCE15} is used for PDSCH transmission.

If the user 2 does not find the DCI transmission after the blind detection, the user 2 considers that the current scheduling time unit itself is not scheduled, and there is no PDSCH transmission, and the "PDCCH domain PDSCH resource indication" field in the DCI is not needed and cannot be parsed.

Example 3:

A class 3 search space, a common search space, a group search space, and a user-specific search space are defined, wherein the group search space can be reused for PDSCH transmission, and FIG. 10 is a PDCCH domain and a PDSCH domain before multiplexing according to Example 3 of the present invention. The schematic diagram can be selected as shown in Figure 10.

In a certain scheduling time unit, the user blindly detects the group search space and uses a specific group RNTI. If the user blindly detects the group search space and considers that the search space does not send DCI, it indicates that the group search space is used on the current scheduling time unit. In the PDSCH transmission, if the user blindly detects the group search space and then considers that the base station sends the DCI on the search space, it indicates that the group search space on the current scheduling time unit is used for DCI transmission, and is not used for PDSCH transmission.

Specifically, in a certain scheduling time unit, the base station does not send the DCI in the group search space. To avoid waste of the PDCCH domain resources, the base station sends the PDSCH in the group search space. FIG. 11 is a PDCCH domain and a PDCCH field according to the third embodiment of the present invention. Schematic diagram of the PDSCH domain, as shown in Figure 11 As shown, according to the frequency domain resource allocation of the PDSCH domain, UE1 and UE2 are respectively scheduled in the PDSCH domain for the frequency domain resources occupied by the group search space. Therefore, the base station divides the group search space into two parts in the frequency domain, and part of the frequency. The UE1 is scheduled, and the other part is scheduled to UE2. The PDSCH frequency domain resource allocation of the scheduled group search space is a subset of the frequency domain resource allocation of the PDSCH domain scheduling, but because the frequency domain range of the group search space is smaller than the frequency domain range of the PDSCH domain, For the user 1, the frequency domain resource allocated to the user 1 for PDSCH transmission in the group search space is less than the frequency domain resource allocated to the user 1 for PDSCH transmission in the PDSCH domain, and the same is true for the user 2.

In the current scheduling time unit, after the user 1 blindly detects the group search space, it is found that the search space does not carry the DCI, and the user 1 knows that the current scheduling unit of the base station reuses the group search space for PDSCH transmission, and the user 1 then blindly detects the user-specific search. Space, for 1 to blindly detect its own DCI in the user-specific search space, read the "resource allocation" field in the DCI, and thus know the frequency domain resources of the PDSCH domain base station to schedule its own PDSCH, which is recorded as resource 1, user 1 will Check the frequency domain resources of the group search space, which is recorded as resource 2. User 1 will take resource 1 and resource 2 to get the resource 3. If resource 3 is not empty, user 1 knows all the time domain resources of the group search space. Corresponding to the frequency domain resource of the resource 3, that is, the shaded portion labeled "Multicast to UE1 PDSCH" in FIG. 11, the base station transmits the PDSCH to itself, so that the user 1 goes to the part of the resource and the "UE1 PDSCH" resource in the PDSCH domain. The PDSCH is demodulated and decoded.

User 2 adopts an operation similar to that of User 1, and finally determines the shaded portion labeled "Multiplexed to UE2 PDSCH" in FIG. 11, and the base station transmits PDSCH to itself, so that User 2 goes to the "multiplexed" shown in FIG. The shaded portion of UE2 PDSCH" and the "UE2PDSCH" resource in the PDSCH domain are demodulated to decode the PDSCH.

After the user N obtains the resource 3 and finds that the resource 3 is empty, the user N knows that the group search space does not need to transmit its own PDSCH transmission, and the user N demodulates and decodes the PDSCH only on the “UEN PDSCH” resource of the PDSCH domain.

Example 4:

Figure 12 shows a schematic diagram of the PDCCH domain and the PDSCH domain before multiplexing. Figure 12 shows that Symbol 0# corresponds to one beam direction, and Symbol 1# corresponds to another. Beam direction, similarly, the PDSCH domain also includes multiple beam directions, Symbol Set 0# corresponds to one beam direction, and Symbol Set 1# corresponds to another beam direction. The first group of users includes user 1, user 2, user 3, and user 4. User 5, the second group of users includes User 6, User 7, User 8, User 9, User 10. The group search space and the user-specific search space of the first group of users are all on Symbol 0#, and the PDSCH domain time domain corresponds to Symbol Set 0#; the group search space of the second group of users and the user-specific search space are all on Symbol 1#. The PDSCH domain time domain corresponds to the Symbol Set 1#, and the two groups of users have the same frequency domain range in the PDSCH domain. The frequency ranges of the PDCCH domain of the two groups of users may be the same or different or overlap.

To avoid waste of PDCCH domain resources, when the group search space does not have DCI transmission, it can be multiplexed to PDSCH transmission, that is, the group search space of the base station on Symbol 0# can be multiplexed to the first group of users for PDSCH transmission, in Symbol 1# The upper group search space can be multiplexed to the second group of users for PDSCH transmission. FIG. 13 is a schematic diagram of a PDCCH domain and a PDSCH domain after multiplexing according to an embodiment of the present invention. Optionally, as shown in FIG. 13, the first group of user groups is allocated according to the frequency allocation of the first group of users in the PDSCH domain. The frequency domain resources of the search space are respectively scheduled to user 1 and user 2, as shown in different shaded parts in FIG. 13, thereby ensuring that the first group of user group search spatially multiplexed PDSCH frequency domain resource allocation is the first group of users PDSCH domain scheduling. A subset of the frequency domain resource allocation, but because the frequency domain range of the group search space is smaller than the frequency domain range of the PDSCH domain, the frequency domain resources allocated to the user 1 for PDSCH transmission in the group search space are less than the PDSCH domain. The frequency domain resources allocated to the user 1 for PDSCH transmission are also the same for the user 2. Similarly, similar processing is applied to the second group of users, so that the group search space corresponding to the second group of users on Symbol 1# is multiplexed to the user 6 and the user 7, corresponding to different shadow types.

In the current scheduling time unit, after the blind search of the group search space of Symbol 0#, the user 1 finds that the search space does not carry the DCI, and the user 1 knows that the current scheduling unit of the base station puts Symbol 0# The group search space is reused for the PDSCH transmission, and the user 1 then blindly detects the user-specific search space of the Symbol 0#, for 1 blindly detecting its own DCI in the user-specific search space, and reading the “resource allocation” field in the DCI, thereby Knowing that the base station on the Symbol Set0# of the PDSCH domain schedules the frequency domain resources of its own PDSCH, here is recorded as resource 1, and user 1 checks the frequency domain resources of the group search space of Symbol 0#, which is recorded as resource 2, and user 1 will Resource 1 and resource 2 are taken together to obtain resource 3. If resource 3 is not empty, user 1 knows the group search space of Symbol 0#, and corresponds to the frequency domain resource of resource 3, that is, labeled as "multiplexed to UE1" in FIG. In the shaded part of the PDSCH, the base station transmits the PDSCH to itself, so that the user 1 demodulates and decodes the PDSCH on the part of the resource and the "UE1 PDSCH" resource in the PDSCH domain.

In the current scheduling time unit, after the blind search of the group search space of the Symbol 1#, the user 6 finds that the search space does not carry the DCI, and the user 6 knows that the current scheduling unit of the base station reuses the group search space of the Symbol 1# for the PDSCH transmission. The user 6 then blindly detects the user-specific search space of the Symbol 1#, and uses 6 to blindly detect the DCI in the user-specific search space, and reads the “resource allocation” field in the DCI, thereby knowing the base station of the Symbol Set1# in the PDSCH domain. The frequency domain resource of the PDSCH is scheduled, which is recorded as resource 1. The user 6 checks the frequency domain resource of the group search space of Symbol 1#, which is recorded as resource 2, and user 6 will take the resource 1 and resource 2 to obtain the resource. 3. If the resource 3 is not empty, the user 6 knows the group search space of the Symbol 1#, and corresponds to the frequency domain resource of the resource 3, that is, the shaded part marked as “multiplexed to the UE6 PDSCH” in FIG. The PDSCH is such that the user 6 demodulates and decodes the PDSCH on the part of the resource and the "UE6 PDSCH" resource in the PDSCH domain.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Execution shown or described The steps are either made into individual integrated circuit modules, or a plurality of modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above is only the embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

In the embodiment of the present invention, the two communication parties obtain the first indication information for indicating the PDCCH resource used for the PDSCH transmission in the PDCCH domain, and then configure the PDSCH by using the corresponding PDCCH resource in the PDCCH domain according to the first indication information, for the PDSCH. Transmission of information. On the one hand, multiplexing of communication resources is realized, on the other hand, unnecessary waste of PDCCH resources is avoided, and on the other hand, the starting time of PDSCH information transmission is advanced, so the effective use rate of communication resources is high, and the multiplexing mode is flexible. The advantage of the PDSCH information transmission delay is small, so it has a positive industrial effect in the industry. At the same time, it has the characteristics of being easy to implement and industrially applicable, and therefore has industrial applicability.

Claims

A method for determining a physical downlink shared channel PDSCH resource includes:

Obtaining first indication information for indicating a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

Determining, according to the first indication information, a PDCCH resource for the PDSCH transmission in the PDCCH domain in a first time unit.
The method of claim 1, wherein the first time unit comprises: one or more scheduling time units, wherein, in the case that the first time unit comprises a plurality of scheduling time units, the plurality of The scheduling time units are discrete or continuous.
The method according to claim 1, wherein the obtaining, by the first indication information, the PDCCH resource for indicating the PDSCH transmission in the PDCCH domain comprises:

Receiving downlink control information DCI; where the DCI includes: an indication field for indicating a PDCCH resource used for PDSCH transmission in the PDCCH domain.
The method according to claim 3, wherein the indication field is used to indicate a candidate for the PDSCH transmission in a specified candidate set of the PDCCH domain; wherein the specified candidate set is a candidate set for an aggregation level or the A subset of the candidate set, the candidate in the specified candidate set is used for PDSCH transmission when no PDCCH is needed for transmission.
The method of claim 4, wherein the candidate set is a subset of all search spaces or all of the search spaces corresponding to the aggregation level.
The method of claim 4 or 5, wherein the aggregation level comprises at least one of the following:

a collection of all aggregation levels;

a collection of partial aggregation levels;

Specify the aggregation level.
The method of claim 4, wherein the candidate set is at least one of:

Corresponding to the entire search space occupied by the entire PDCCH for time-frequency resources;

Corresponding to a partial search space in which the PDCCH occupies the time-frequency resource in the specified beam direction;

Corresponding to a partial search space of a specified search space type; wherein the specified search space type comprises at least one of the following: a common search space, a dedicated search space, a group search space, wherein the group search space is a DCI shared by a group of terminals Search space.
The method of claim 4, wherein the indication field comprises the same number of bits as the number of candidates included in the specified candidate set.
The method according to claim 8, wherein when the bit in the indication field is the first specified value, the candidate corresponding to the bit in the specified candidate set is used for the PDSCH transmission; When the bit is the second specified value, it indicates that the candidate corresponding to the bit in the specified candidate set is not used for the PDSCH transmission.
The method according to claim 4, wherein the aggregation level corresponding to the specified candidate set is determined by at least one of the following:

Radio resource control RRC signaling configuration;

Semi-static configuration of system information block SIB or system information SI;

Designated agreement provisions;

And determining, according to a detection result that the base station sends a PDCCH to the terminal in the current scheduling time unit, where the aggregation level of the specified candidate set is sent by the base station, if the detection result is that the PDCCH is sent to the terminal The aggregation level used by the PDCCH is the same. If the detection result is that the PDCCH is not sent to the terminal, the aggregation level of the specified candidate set is a default aggregation level.
The method according to claim 1, wherein the obtaining, by the first indication information, the PDCCH resource for indicating the PDSCH transmission in the PDCCH domain comprises:

Detecting whether the base station carries the DCI or the effective control channel in the predetermined search space, and obtains a detection result; wherein, in the detection result, the DCI is carried in the predetermined search space Or the effective control channel, indicating that the PDCCH domain is used for PDCCH transmission, and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.
The method of claim 11, wherein the predetermined search space is a search space corresponding to one or more control channel basic resource units.
The method of claim 11, wherein the search space comprises at least one of: a common search space, a group search space; wherein the group search space is a search space in which a group of terminals share a DCI.
The method of claim 11, wherein the predetermined search space is one OFDM symbol or one OFDM symbol group in the time domain dimension, corresponding to one beam direction.
The method according to claim 11, wherein after determining the PDCCH resource for the PDSCH transmission in the PDCCH domain in the first time unit according to the indication information, the method further includes:

It is judged whether or not the PDSCH of the terminal is transmitted on the predetermined search space.
The method of claim 15, wherein determining whether to transmit the PDSCH of the terminal on the predetermined search space comprises:

Blindly detecting a PDCCH on other candidate or other search spaces other than the predetermined search space;

When detecting that the base station sends the DCI to the terminal itself, and the DCI includes the resource allocation indication field, according to the resource allocation rule of the predetermined search space transmission PDSCH, the frequency indicated by the resource allocation indication field is used. And the frequency domain resource corresponding to the predetermined search space is obtained by the domain resource to obtain the first frequency domain resource, where the resource allocation rule includes: the frequency corresponding to the predetermined search space according to the frequency domain resource allocation result of the PDSCH domain The domain resource is allocated to the corresponding terminal;

Determining that the base station transmits the PDSCH of the terminal on the time-frequency resource corresponding to the first frequency domain resource in the predetermined search space.
A method for determining a physical downlink shared channel PDSCH resource includes:

Obtaining first indication information for indicating a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

Transmitting, by the terminal, the first indication information, where the first indication information is used by the terminal to determine, in the first time unit, a PDCCH resource used for the PDSCH transmission in the PDCCH domain.
The method of claim 17, wherein the first time unit comprises: one or more scheduling time units, wherein, in the case that the first time unit comprises a plurality of scheduling time units, the plurality of The scheduling time units are discrete or continuous.
The method of claim 17, wherein the first indication information comprises:

Downlink control information DCI; where the DCI includes: an indication field for indicating a PDCCH resource for PDSCH transmission in the PDCCH domain.
The method according to claim 19, wherein the indication field is used to indicate a candidate for the PDSCH transmission in a specified candidate set of the PDCCH domain; wherein the specified candidate set is a candidate set for an aggregation level or the A subset of the candidate set, the candidate in the specified candidate set is used for PDSCH transmission when no PDCCH is needed for transmission.
The method of claim 20, wherein the candidate set is a subset of all search spaces or all of the search spaces corresponding to the aggregation level.
The method of claim 20 or 21, wherein the aggregation level comprises at least one of the following:

a collection of all aggregation levels;

a collection of partial aggregation levels;

Specify the aggregation level.
The method of claim 20, wherein the candidate set is at least one of:

Corresponding to the entire search space occupied by the entire PDCCH for time-frequency resources;

Corresponding to a partial search space in which the PDCCH occupies the time-frequency resource in the specified beam direction;

Corresponding to a partial search space of a specified search space type; wherein the specified search space type comprises at least one of the following: a common search space, a dedicated search space, a group search space, wherein the group search space is a DCI shared by a group of terminals Search space.
The method of claim 20, wherein the indication field comprises the same number of bits as the number of candidates included in the specified candidate set.
The method according to claim 24, wherein when the bit in the indication field is the first specified value, the candidate corresponding to the bit in the specified candidate set is used for the PDSCH transmission; When the bit is the second specified value, it indicates that the candidate corresponding to the bit in the specified candidate set is not used for the PDSCH transmission.
The method according to claim 20, wherein the aggregation level corresponding to the specified candidate set is determined by at least one of the following:

Radio resource control RRC signaling configuration;

Semi-static configuration of system information block SIB or system information SI;

Designated agreement provisions;

And determining, according to a detection result that the base station sends a PDCCH to the terminal in the current scheduling time unit, where the aggregation level of the specified candidate set is sent by the base station, if the detection result is that the PDCCH is sent to the terminal The aggregation level used by the PDCCH is the same. If the detection result is that the PDCCH is not sent to the terminal, the aggregation level of the specified candidate set is a default aggregation level.
The method of claim 17, wherein the first indication information comprises: whether the base station carries a DCI or a valid control channel in a predetermined search space; wherein the DCI or effective control is carried in the predetermined search space In the case of a channel, indicating that the PDCCH domain is used for PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.
The method of claim 27, wherein the predetermined search space is a search space corresponding to one or more control channel basic resource units.
The method of claim 27, wherein the search space comprises at least one of: a common search space, a group search space; wherein the group search space is a search space in which a group of terminals share a DCI.
The method according to claim 27, wherein before the first indication information for indicating a PDCCH resource for the PDSCH transmission in the physical downlink control channel PDCCH domain is configured, the method further includes:

Allocating the frequency domain resource corresponding to the predetermined search space to the corresponding terminal according to the resource allocation rule; wherein the resource allocation rule includes: the frequency domain resource corresponding to the predetermined search space according to the frequency domain resource allocation result of the PDSCH domain Assigned to the corresponding terminal.
The method according to claim 30, wherein, in a case where the PDSCH domain has a plurality of frequency domain resource allocation results in a time division multiplexing TDM manner, the method further comprises: allocating results from the plurality of frequency domain resources A frequency domain resource allocation result is selected, and a PDSCH resource is determined for each OFDM symbol or each OFDM symbol group according to the resource allocation rule.
The method of claim 27, wherein the predetermined search space is one OFDM symbol or one OFDM symbol group in the time domain dimension, corresponding to one beam direction.
A device for determining a physical downlink shared channel PDSCH resource includes:

An acquiring module, configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

And a determining module, configured to determine, according to the indication information, a PDCCH resource used for the PDSCH transmission in the PDCCH domain in the first time unit.
The apparatus according to claim 33, wherein the acquiring module is further configured to receive downlink control information DCI, where the DCI includes: used to indicate the PDCCH An indication field of a PDCCH resource for a PDSCH transmission in a domain.
The apparatus according to claim 34, wherein the indication field is used to indicate a candidate for the PDSCH transmission in a specified candidate set of the PDCCH domain; wherein the specified candidate set is a candidate set for an aggregation level or the A subset of the candidate set, the candidate in the specified candidate set is used for PDSCH transmission when no PDCCH is needed for transmission.
The apparatus according to claim 33, wherein the obtaining module is further configured to detect whether the base station carries a DCI or a valid control channel in a predetermined search space, and obtain a detection result; wherein, the detection result is in the In the case that the DCI or the effective control channel is carried in the predetermined search space, it is indicated that the PDCCH domain is used for PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.
The apparatus of claim 36, wherein the apparatus further comprises: a determination module configured to determine whether to transmit the PDSCH of the terminal on the predetermined search space.
The apparatus of claim 37, wherein the determining module comprises:

a blind detection unit configured to blindly detect a PDCCH on other candidate or other search spaces other than the predetermined search space;

a processing unit, configured to: when detecting that the base station sends the DCI to the terminal itself, and the resource allocation indication field is included in the DCI, allocate the resource according to the resource allocation rule of the PDSCH in the predetermined search space And indicating, by the frequency domain resource indicated by the domain, a frequency domain resource corresponding to the predetermined search space, to obtain a first frequency domain resource, where the resource allocation rule includes: the predetermined according to a frequency domain resource allocation result of the PDSCH domain The frequency domain resource corresponding to the search space is allocated to the corresponding terminal;

And a determining unit, configured to determine that the base station transmits the PDSCH of the terminal on a time-frequency resource corresponding to the first frequency domain resource in the predetermined search space.
A device for determining a physical downlink shared channel PDSCH resource includes:

Obtaining a module, configured to obtain, used to indicate a physical downlink control channel in the PDCCH region First indication information of a PDCCH resource transmitted by the PDSCH;

And a sending module, configured to send the first indication information to the terminal, where the first indication information is used by the terminal to determine, in the PDCCH domain in the first time unit, the PDCCH resource used for the PDSCH transmission.
The apparatus of claim 39, wherein the first indication information comprises:

Downlink control information DCI; where the DCI includes: an indication field for indicating a PDCCH resource for PDSCH transmission in the PDCCH domain.
The apparatus according to claim 40, wherein the indication field is used to indicate a candidate for the PDSCH transmission in a specified candidate set of the PDCCH domain; wherein the specified candidate set is a candidate set for an aggregation level or the A subset of the candidate set, the candidate in the specified candidate set is used for PDSCH transmission when no PDCCH is needed for transmission.
The apparatus according to claim 39, wherein said first indication information comprises: whether a base station carries a DCI or a valid control channel in a predetermined search space; wherein said DCI or effective control is carried in said predetermined search space In the case of a channel, the PDCCH domain is used for PDCCH transmission, and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.
The device of claim 42, wherein the device further comprises:

a first allocation module, configured to allocate a frequency domain resource corresponding to the predetermined search space to a corresponding terminal according to a resource allocation rule, where the resource allocation rule includes: the predetermined according to a frequency domain resource allocation result of a PDSCH domain The frequency domain resources corresponding to the search space are allocated to the corresponding terminals.
The device of claim 43, wherein the device further comprises:

a second allocation module, configured to select a frequency domain resource allocation result from the multiple frequency domain resource allocation results when the PDSCH domain has multiple frequency domain resource allocation results in a time division multiplexing TDM manner According to the resource allocation rule for each OFDM symbol or each The OFDM symbol group determines the PDSCH resource.
A terminal comprising:

a radio frequency module, configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

And a processor, configured to determine, according to the indication information, a PDCCH resource used for the PDSCH transmission in the PDCCH domain in a first time unit.
The terminal according to claim 45, wherein the radio frequency module is further configured to receive downlink control information DCI, where the DCI includes: an indication for indicating a PDCCH resource for PDSCH transmission in the PDCCH domain. area.
The terminal according to claim 46, wherein the indication domain is configured to indicate a candidate for the PDSCH transmission in a specified candidate set of the PDCCH domain; wherein the specified candidate set is a candidate set for an aggregation level or the A subset of the candidate set, the candidate in the specified candidate set is used for PDSCH transmission when no PDCCH is needed for transmission.
The terminal according to claim 45, wherein the radio frequency module is further configured to detect whether the base station carries a DCI or a valid control channel in a predetermined search space, and obtain a detection result; wherein, the detection result is in the In the case that the DCI or the effective control channel is carried in the predetermined search space, it is indicated that the PDCCH domain is used for PDCCH transmission and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.
The terminal according to claim 48, wherein the processor is further configured to blindly detect a PDCCH on other candidate or other search spaces other than the predetermined search space; and detecting that the base station sends a DCI to the terminal itself, And if the resource allocation indication field is included in the DCI, the frequency domain resource corresponding to the predetermined search space is the frequency domain resource indicated by the resource allocation indication field according to the resource allocation rule of the predetermined search space transmission PDSCH. Taking the intersection to obtain the first frequency domain resource, where the resource allocation rule includes: allocating the frequency domain resource corresponding to the predetermined search space to the corresponding terminal according to the frequency domain resource allocation result of the PDSCH domain And determining, by the base station, the PDSCH of the terminal on the time-frequency resource corresponding to the first frequency domain resource in the predetermined search space.
A base station comprising:

a processor, configured to acquire first indication information used to indicate a PDCCH resource used for PDSCH transmission in a physical downlink control channel PDCCH domain;

The radio frequency module is configured to send the first indication information to the terminal, where the first indication information is used by the terminal to determine, in the PDCCH domain in the first time unit, the PDCCH resource used for the PDSCH transmission.
The base station according to claim 50, wherein the first indication information comprises:

Downlink control information DCI; where the DCI includes: an indication field for indicating a PDCCH resource for PDSCH transmission in the PDCCH domain.
The base station according to claim 51, wherein the indication field is used to indicate a candidate for the PDSCH transmission in a specified candidate set of the PDCCH domain; wherein the specified candidate set is a candidate set for an aggregation level or the A subset of the candidate set, the candidate in the specified candidate set is used for PDSCH transmission when no PDCCH is needed for transmission.
The base station according to claim 50, wherein said first indication information comprises: whether a base station carries a DCI or a valid control channel in a predetermined search space; wherein said DCI or effective control is carried in said predetermined search space In the case of a channel, the PDCCH domain is used for PDCCH transmission, and the frequency domain resource corresponding to the predetermined search space is the PDCCH resource.
The base station according to claim 53, wherein the processor is further configured to allocate a frequency domain resource corresponding to the predetermined search space to a corresponding terminal according to a resource allocation rule; wherein the resource allocation rule comprises: according to a PDSCH The frequency domain resource allocation result of the domain allocates the frequency domain resource corresponding to the predetermined search space to the corresponding terminal.
The base station according to claim 54, wherein said processor is further for said When the PDSCH domain has multiple frequency domain resource allocation results in the time division multiplexing TDM mode, one frequency domain resource allocation result is selected from the multiple frequency domain resource allocation results, and each resource allocation rule is used according to the resource allocation rule. The OFDM symbol or each OFDM symbol group determines a PDSCH resource.
A computer storage medium having stored therein computer executable instructions for performing the method of determining PDSCH resources provided by any one of claims 1 to 16, or performing claim 17 A method of determining PDSCH resources provided by 32.