WO2020220330A1

WO2020220330A1 - Wireless communication method, terminal device and network device

Info

Publication number: WO2020220330A1
Application number: PCT/CN2019/085343
Authority: WO
Inventors: 陈文洪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-11-05
Also published as: CN112236966B; CN112236966A

Abstract

A wireless communication method, a terminal device, and a network device. The method comprises: a terminal device receives first downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), the first DCI comprising transmission configuration indication (TCI) and first demodulation reference signal (DMRS) port indication information, wherein the TCI is used for indicating multiple candidate TCI states, and the first DMRS port indication information is used for indicating at least one DMRS port corresponding to the PDSCH; and the terminal device determines, according to the at least one DMRS port, a target TCI state corresponding to the PDSCH from among the multiple candidate TCI states.

Description

Wireless communication method, terminal equipment and network equipment

Technical field

The embodiments of the present application relate to the field of communications, and in particular to a wireless communication method, terminal device, and network device.

Background technique

In the New Radio (NR) system, downlink and uplink non-coherent transmission (Non-Coherent Joint Transmission, NC-JT) is introduced. In the downlink non-coherent transmission, multiple transmission points (Transmission Point, TRP) can use the same control channel to schedule a UE's physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) transmission, wherein different TRPs transmit different transmissions at the same time Layer data. In the uplink non-coherent transmission, if the terminal device is configured with multiple antenna panels (panels), the terminal device can use multiple panels to simultaneously transmit different transmission layers of the same Physical Uplink Shared Channel (PUSCH).

In downlink multi-TRP transmission, if the channel of one TRP becomes worse, using two TRP transmissions at the same time will cause retransmission because part of the transmission layer cannot detect correctly, thereby reducing system throughput. Similarly, in uplink multi-panel transmission, if the channel of a certain panel suddenly deteriorates, the performance of simultaneous transmission of multiple panels will be affected, thereby reducing system throughput.

Summary of the invention

The embodiments of the present application provide a wireless communication method, terminal device, and network device, which are beneficial to improving system performance.

In a first aspect, a wireless communication method is provided, including a terminal device receiving first downlink control information DCI for scheduling a physical downlink shared channel PDSCH, the first DCI including a transmission configuration indicator TCI and a first demodulation reference Signal DMRS port indication information, where the TCI is used to indicate multiple candidate TCI states, and the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The terminal device determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port.

In a second aspect, a wireless communication method is provided, including: a terminal device receives second downlink control information DCI for scheduling a physical uplink shared channel PUSCH, where the second DCI includes a sounding reference signal resource indicator SRI and a second solution. Tuning reference signal DMRS port indication information, where the SRI is used to indicate a plurality of candidate sounding reference signal SRS resources, and the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

The terminal device determines the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port.

In a third aspect, a wireless communication method is provided, which includes: a network device determines a target TRP for transmitting PDSCH according to channel information of a plurality of TRPs of transmission reception points; and determines a first PDSCH schedule according to the target TRP. A transmission configuration indication TCI in the downlink control information DCI; according to the target TRP, the first demodulation reference signal DMRS port indication information in the first DCI is determined, and the first DMRS port indication information is used to indicate all At least one DMRS port corresponding to the PDSCH; the network device sends the PDSCH based on the at least one DMRS port.

In a fourth aspect, a wireless communication method is provided, which includes: a network device determines a target antenna panel for transmitting the physical uplink shared channel PUSCH according to channel information of multiple antenna panels; and determines a dispatch station according to the target antenna panel. The sounding reference signal resource indication SRI in the second downlink control information DCI of the PUSCH; the second demodulation reference signal DMRS port indication information in the second DCI is determined according to the target antenna panel, and the second DMRS port The indication information is used to indicate at least one DMRS port corresponding to the PUSCH; the PUSCH is detected based on the at least one DMRS port.

In a fifth aspect, a terminal device is provided, which is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect. Specifically, the terminal device includes a unit for executing the method in the first aspect or any possible implementation of the first aspect, or for executing the second aspect or any possible implementation of the second aspect. The unit of the method.

In a sixth aspect, a network device is provided, which is configured to execute the foregoing second aspect or any possible implementation of the second aspect. Specifically, the network device includes a unit for executing the method in the third aspect or any possible implementation of the third aspect, or for executing the fourth aspect or any possible implementation of the fourth aspect. The unit of the method.

In a seventh aspect, a terminal device is provided. The terminal device includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and execute the methods in the first aspect to the second aspect or each implementation manner thereof.

In an eighth aspect, a network device is provided, and the network device includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the methods in the third aspect to the fourth aspect described above or their respective implementation manners.

In a ninth aspect, a chip is provided for implementing any one of the above-mentioned first to fourth aspects or a method in each of its implementation manners.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first aspect to the fourth aspect or any of the implementations thereof method.

In a tenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute any one of the above-mentioned first to fourth aspects or the method in each implementation manner thereof.

In an eleventh aspect, a computer program product is provided, including computer program instructions that cause a computer to execute any one of the above-mentioned first to fourth aspects or the method in each implementation manner thereof.

In a twelfth aspect, a computer program is provided, which, when run on a computer, causes the computer to execute any one of the above-mentioned first to fourth aspects or the method in each implementation manner thereof.

Based on the above technical solution, the network device can configure the terminal device to dynamically select the currently used at least one TCI state or SRS resource from the multiple TCI states or multiple SRS resources indicated by the DCI through the DMRS port indication information, thereby dynamically selecting the corresponding TRP or The panel is used for data transmission. It supports dynamic switching between DPS and NC-JT in the downlink, and supports dynamic switching between single panel transmission and multi-panel simultaneous transmission in the uplink. In this way, when the channel quality of a certain TRP or a certain panel is degraded, the transmission performance can be guaranteed by switching to DPS. In the case of better channel quality, multiple TRP or multi-panel transmission can be used at the same time to improve throughput. Thus, a higher transmission rate can be achieved in various scenarios.

Description of the drawings

Fig. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application.

Figure 2 is a schematic interaction diagram of downlink beam management.

Figures 3a and 3b are schematic diagrams of downlink DPS and NC-JT, respectively.

Fig. 4 is a schematic interaction diagram of uplink beam management.

Figures 5a and 5b are schematic diagrams of uplink single-panel transmission and multi-panel simultaneous transmission, respectively.

Figure 6a and Figure 6b are schematic diagrams of Type 1 DMRS.

Figures 7a and 7b are schematic diagrams of Type 1 DMRS.

FIG. 8 is a schematic diagram of a wireless communication method provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of a wireless communication method provided by an embodiment of the present application.

FIG. 10 is a schematic interaction diagram of a wireless communication method provided by an embodiment of the present application.

Figure 11 is a schematic diagram of flexible switching between downlink DPS and NC-JT.

FIG. 12 is a schematic diagram of another wireless communication method provided by an embodiment of the present application.

FIG. 13 is a schematic diagram of another wireless communication method provided by an embodiment of the present application.

FIG. 14 is a schematic interaction diagram of another wireless communication method provided by an embodiment of the present application.

Figure 15 is a schematic diagram of flexible switching between uplink single panel transmission and uplink multi-panel simultaneous transmission.

FIG. 16 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 17 is a schematic block diagram of a network device provided by an embodiment of the present application.

FIG. 18 is a schematic block diagram of another terminal device provided by an embodiment of the present application.

FIG. 19 is a schematic block diagram of another network device provided by an embodiment of the present application.

FIG. 20 is a schematic block diagram of a communication device according to another embodiment of the present application.

FIG. 21 is a schematic block diagram of a chip provided by an embodiment of the present application.

FIG. 22 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and broadband code Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution LTE system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, New Radio (NR) or future 5G System etc.

In particular, the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems, low-density signatures (Low Density Signature, LDS) system, etc. Of course, the SCMA system and LDS system can also be called other names in the communication field; further, the technical solutions of the embodiments of this application can be applied to multi-carriers using non-orthogonal multiple access technology Transmission systems, such as non-orthogonal multiple access technology Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (Generalized Frequency Division Multiplexing) Frequency Division Multiplexing (GFDM), Filtered-OFDM (F-OFDM) systems, etc.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network devices gNB in 5G networks, or network devices in the future evolution of public land mobile networks (Public Land Mobile Network, PLMN), etc.

The communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes but is not limited to User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, Terminal, wireless communication equipment, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., are not limited in the embodiment of the present invention.

Optionally, direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.

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

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the application.

It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the NR system, the network equipment can use the analog beam to transmit the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH). Before performing analog beamforming, the network equipment needs to determine the beam to be used through the downlink beam management process. The downlink beam management can be based on the channel state information reference signal (Channel State Information Reference Signal, CSI-RS) or the synchronization signal block (Synchronization Signal). Block, SSB). As shown in Figure 2, the network device (gNB) sends N SSBs or N CSI-RS resources for beam management, where N is greater than 1, and the terminal device performs measurement based on the N SSBs or N CSI-RS resources , Select K SSB or CSI-RS resources with the best reception quality, K is greater than or equal to 1, and add the corresponding SSB index or CSI-RS resource index and the corresponding reference signal received power (Reference Signal Receiving Power, RSRP) Report to the network device. The network device determines an optimal SSB or CSI-RS resource according to the report of the terminal device, determines its used transmission beam as the transmission beam used for downlink transmission, and then uses the transmission beam to transmit the downlink control channel or the downlink data channel. Before the network device transmits the downlink control channel or downlink data channel, it can indicate the corresponding Quasi-co-located (QCL) reference signal to the terminal device through the Transmission Configuration Indicator (TCI) state, so that the terminal The device may use the receiving beam used to receive the QCL reference signal to receive the corresponding downlink control channel, such as the Physical Downlink Control Channel (PDCCH) or the downlink data channel, for example, the Physical Downlink Shared Channel (Physical Downlink Shared Channel). , PDSCH).

In the NR system, a downlink non-coherent transmission (Non-Coherent Joint Transmission, NC-JT) is introduced. In the downlink non-coherent transmission, multiple TRPs can use the same control channel to independently schedule PDSCH transmission of a UE. Among them, different TRPs transmit data of different transmission layers at the same time, and the terminal equipment needs to support simultaneous reception of PDSCH transmissions from different TRPs. Floor. The data transmitted by different TRPs need to be configured with independent TCI states and DMRS ports, and different DMRS ports need to belong to different Code Division Multiple (CDM) groups to ensure orthogonality between DMRS ports, as shown in Figure 3a Shown. Alternatively, the network equipment can also dynamically select a TRP with better channel quality from the two TRPs to transmit PDSCH to avoid mutual interference. This transmission method is Dynamic Point Switching (DPS), as shown in Figure 3b Shown.

In the NR system, the UE can use analog beams to transmit uplink data and uplink control information. The UE can perform uplink beam management based on the SRS signal, thereby determining the analog beam used for uplink transmission. Specifically, as shown in FIG. 4, a network device (gNB) may configure a sounding reference signal (Sounding Reference Signal, SRS) resource set 1 for the UE, and the set 1 includes N SRS resources (N>1). The UE may use different beams to transmit the N SRS resources, and the gNB measures the reception quality of the N SRS resources respectively, and selects K SRS resources with the best reception quality. The gNB can configure another SRS resource set 2, which includes K SRS resources, and make the UE use the analog beams used by the K SRS resources selected in the set 1 to transmit the SRS resources in the set 2. This can be achieved by configuring the K SRS resources selected in set 1 as reference SRS resources of the K SRS resources in set 2 respectively. At this time, based on the SRS transmitted by the UE in the SRS resource set 2, the gNB can select an SRS resource with the best reception quality, and notify the UE of the corresponding SRI. After receiving the SRI, the UE determines the simulated beam used for the SRS resource indicated by the SRS Resource indicator (SRS Resource indicator, SRI) to transmit the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) or the physical uplink control channel (Physical Uplink Control) Channel, PUCCH) analog beam used. For PUSCH, the SRI is indicated by the SRI indication field in Downlink Control Information (DCI). For PUCCH, PUCCH spatial relation information (PUCCH-spatialrelationinfo) corresponding to each PUCCH resource can be configured in RRC signaling, and this information field can include SRI.

The UE may have multiple antenna panels (panels) for uplink transmission. One panel includes a group of physical antennas, and each panel has an independent radio frequency channel. The UE needs to notify the number of panels supported by the gNB in the capability report. At the same time, the UE may also need to notify the gNB whether it has the ability to transmit signals on multiple panels at the same time. Since different panels correspond to different channel conditions, different panels need to adopt different transmission parameters according to their respective channel information. In order to obtain these transmission parameters, different sets of SRS resources can be configured for different panels to obtain uplink channel information. For example, in order to perform uplink beam management, an SRS resource set can be configured for each panel, so that each panel performs beam management separately and determines an independent analog beam. In order to obtain the precoding information used for PUSCH transmission, an SRS resource set can also be configured for each panel to obtain transmission parameters such as the beam, precoding vector, and number of transmission layers used by the PUSCH transmitted on the panel.

Similarly, the NR system also introduces uplink non-related parameters. If the UE is configured with multiple panels and supports simultaneous transmission of PUSCH on multiple panels, the two PUSCHs can be transmitted at the same time, as shown in Figure 5a. If the UE has multiple panels, but does not support simultaneous transmission of multiple panels, the UE can only transmit PUSCH on one panel, as shown in Figure 5b.

In NR, two types of demodulation reference signals (Demodulation Reference Signal, DMRS) are introduced: Type 1 DMRS and Type 2 DMRS. Among them, Type 1 DMRS adopts a comb structure plus Orthogonal Cover Code (OCC) code structure, and Type 2 adopts Frequency Division Multiplexing (Frequency Division Multiplexing, FDM)) plus OCC structure. For Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms, both DMRS types are supported and configured through high-level signaling. For Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), only Type 1DMRS is supported.

For example, when configuring a single DMRS symbol, Type 1 DMRS includes two sets of frequency-divided comb resources, and supports up to 4 DMRS ports. Each group of comb resources occupies the same subcarrier, can support up to 2 DMRS ports, and adopts frequency domain OCC to ensure the orthogonality of these two ports, which is called a CDM group. In this way, a total of 2 CDM groups are included in one OFDM symbol, and the indexes are {0, 1} respectively, as shown in Figure 6a. If two OFDM symbols are configured, a maximum of 8 DMRS ports can be supported, and each CDM group supports a maximum of 4 DMRS ports. The DMRS ports in the CDM group ensure orthogonality through time domain and frequency domain OCC, as shown in Figure 6b Shown.

For Type 2DMRS, when configuring a single OFDM symbol, it can include 3 sets of frequency division resources, and can support up to 6 DMRS ports. Among them, each group of resources includes 4 subcarriers, supports up to 2 DMRS ports, and adopts the frequency domain OCC method to ensure the orthogonality of these two ports, which is also called a CDM group. In this way, a total of 3 CDM groups are included in one OFDM symbol, and the indexes are {0,1,2} respectively, as shown in Figure 7a. If two OFDM symbols are configured, a maximum of 12 DMRS ports can be supported, and each CDM group supports a maximum of 4 DMRS ports. The DMRS ports in the CDM group can ensure orthogonality through time domain and frequency domain OCC, as shown in Figure 7b Shown.

In NC-JT technology, network equipment can indicate two TCI states through DCI to support simultaneous transmission of two TRPs. Each TCI state is used to detect the PDSCH transport layer or DMRS port of a TRP. At this time, if the channel of one TRP becomes worse, using two TRPs for transmission at the same time will cause retransmissions because part of the transmission layer cannot be correctly detected, thereby reducing the system throughput, and even worse than the performance of a single transmission point DPS transmission.

Similarly, in uplink multi-panel transmission, if the channel of a certain panel suddenly deteriorates, the performance of simultaneous transmission of multiple panels may not be as good as single-panel transmission, thereby reducing system throughput.

In view of this, the embodiments of the present application provide a technical solution that can implement dynamic switching between NC-JT and DPS, thereby improving data transmission performance.

FIG. 8 is a schematic flowchart of a wireless communication method provided by an embodiment of this application.

S210. The terminal device receives first downlink control information DCI used to schedule the physical downlink shared channel PDSCH, where the first DCI includes transmission configuration indication TCI and first demodulation reference signal DMRS port indication information, where the TCI uses For indicating multiple candidate TCI states, the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

S220: The terminal device determines a target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port.

Optionally, in this embodiment of the present application, a TCI state may include the following configuration:

1. TCI status identifier (Identify, ID), used to identify a TCI status;

2. QCL information 1;

3. QCL information 2.

Among them, a QCL message can include the following information:

QCL type configuration, for example, can be one of QCL type A (QCL TypeA), QCL type B (QCL TypeB), QCL type C (QCL TypeC) or QCL type D (QCL TypeD);

The QCL reference signal configuration, for example, may include the cell ID where the reference signal is located, the bandwidth part (Bandwidth, BWP) ID, and the identification of the reference signal (for example, it may be a CSI-RS resource ID or an SSB index).

Among them, in QCL information 1 and QCL information 2, the QCL type of at least one QCL information is one of QCL TypeA, QCL TypeB, and QCL TypeC. If another QCL information is configured, the QCL type of the QCL information is QCL TypeD.

Among them, the definition of different QCL type configurations is as follows:

1. QCL-TypeA: {Doppler shift (Doppler shift), Doppler spread (Doppler spread), average delay (average delay), delay spread (delay spread)};

2. QCL-TypeB: {Doppler shift, Doppler spread};

3. QCL-TypeC: {Doppler shift, average delay};

4. QCL-TypeD: {Spatial Rx parameter}.

In the embodiment of this application, if the network device configures the QCL reference signal of the target downlink channel as a reference SSB or reference CSI-RS resource through the TCI state, and the QCL type is configured as QCL-TypeA, QCL-TypeB or QCL-TypeC, the terminal The device may assume that the target large-scale parameters of the target downlink channel and the reference SSB or reference CSI-RS resource are the same, so that the same corresponding receiving parameters are used for reception, and the target large-scale parameters may be configured through QCL type configuration. determine. Similarly, if the network device configures the QCL reference signal of the target downlink channel as a reference SSB or reference CSI-RS resource through the TCI state, and the QCL type is configured as QCL-TypeD, the terminal device can use and receive the reference SSB or reference CSI. -Receive beams (ie Spatial Rx parameter) with the same RS resources to receive the target downlink channel. Generally speaking, the target downlink channel and its reference SSB or reference CSI-RS resource are transmitted by the same TRP, the same panel or the same beam on the network device side. If the transmission TRP or transmission panel or transmission beam of the two downlink signals or downlink channels are different, different TCI states can be configured.

Therefore, in the embodiment of the present application, the terminal device determines the current downlink data transmission corresponding to the current downlink data transmission from the multiple candidate TCI states indicated in the DCI for scheduling the downlink data transmission according to the DMRS port used for the downlink data transmission configured by the network The target TCI state, so that the downlink data channel detection is performed according to the target TCI state, is beneficial to improve system performance.

It should be understood that the embodiment of the present application only describes the example that the downstream channel is PDSCH, and the method disclosed in the embodiment of the present application is also applicable to other downlink channels, which is not limited in the embodiment of the present application.

Optionally, in some embodiments, the terminal device determining the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port includes:

If the at least one DMRS port belongs to the same code division multiplexing CDM group, the terminal device determines the target TCI corresponding to the PDSCH from the multiple candidate TCI states according to the CDM group to which the at least one DMRS port belongs status.

It should be noted that in the embodiment of the present application, a CDM group may represent a group of DMRS ports occupying the same physical resources (for example, the same subcarrier), and these DMRS ports may ensure orthogonality through different sequences or different OCCs. . For example, for the type 1 DMRS described above, the index of the CDM group may be 0 or 1, and for the type 2 DMRS described above, the index of the CDM group may be 0, 1, or 2.

Optionally, in some embodiments, the terminal device determining the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the CDM group to which the at least one DMRS port belongs includes:

If the index of the CDM group to which the at least one DMRS port belongs is 0, the target TCI state corresponding to the PDSCH is the first TCI state among the multiple candidate TCI states, and if the index of the CDM group is 1, The target TCI state corresponding to the PDSCH is the second TCI state among the multiple candidate TCI states; or,

If the index of the CDM group is 0, the target TCI state corresponding to the PDSCH is the first TCI state among the multiple candidate TCI states, and if the index of the CDM group is 1 or 2, the PDSCH The corresponding target TCI state is the second TCI state among the multiple candidate TCI states.

It should be understood that the above-mentioned correspondence between the CDM group and the TCI state is only an example, and the CDM group and the TCI state may also have other correspondences. For example, the index of the CDM group is 0 corresponding to the second TCI state among the multiple candidate TCI states. The index of the CDM group is 1, corresponding to the first TCI state among multiple candidate TCI states; or, it can also be: if the index of the CDM group is 0 or 1, the target TCI state corresponding to the PDSCH is the For the first TCI state among the multiple candidate TCI states, if the index of the CDM group is 2, the target TCI state corresponding to the PDSCH is the second TCI state among the multiple candidate TCI states.

In an implementation manner, the corresponding relationship between the index of the CDM group and the TCI state may be pre-appointed by the terminal device and the network device. In another implementation manner, the corresponding relationship between the index of the CDM group and the TCI state may also be configured by the network device to the terminal device.

Determine the target TCI state corresponding to the PDSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the TCI state.

Specifically, each DMRS port can correspond to one transmission layer, the at least one DMRS port can correspond to at least one transmission layer, and the transmission layer can be mapped to a codeword. The codeword can have a corresponding relationship with the TCI state. Therefore, according to the The codeword mapped by the transmission layer corresponding to at least one DMRS port, combined with the corresponding relationship, can determine the target TCI state corresponding to the PDSCH.

Optionally, in some embodiments, the correspondence relationship includes:

Code word 0 corresponds to the first TCI state among the plurality of candidate TCI states, and code word 1 corresponds to the second TCI state among the plurality of candidate TCI states.

It should be understood that the correspondence between the codeword and the TCI state is only an example, and the codeword and the TCI state can also be other correspondences. For example, codeword 0 corresponds to the second TCI state among multiple candidate TCI states, and codeword 1 , Corresponding to the first TCI state among multiple candidate TCI states, etc.

In an implementation manner, the corresponding relationship between the codeword and the TCI state may be pre-arranged by the terminal device and the network device. In another implementation manner, the corresponding relationship between the codeword and the TCI state may also be configured by the network device to the terminal device.

Optionally, in some embodiments, the method 200 may further include:

The terminal device detects the PDSCH according to the target TCI state corresponding to the PDSCH.

Specifically, the terminal device uses the large-scale parameter used to detect the QCL reference signal to detect the PDSCH according to the QCL type and QCL reference signal included in the TCI state, and the large-scale parameter is the QCL type The indicated large-scale parameters.

For example, suppose that the TCI state corresponding to the PDSCH includes QCL TypeC and the corresponding first SSB index, and QCL TypeD and the corresponding first CSI-RS resource ID, the first SSB index indicates the first SSB, and the A CSI-RS resource ID indicates the first CSI-RS resource. Then the terminal device may assume that the channels through which the signals on the PDSCH and the first SSB pass have the same Doppler shift and average delay. At this time, the terminal device may use the Doppler shift and average time delay used for receiving the signal on the first SSB to detect the PDSCH. At the same time, the terminal device may also use a receiving beam used to receive the CSI-RS signal on the first CSI-RS resource to receive the first PDSCH.

The wireless communication method according to the embodiment of the present application is described in detail above with reference to FIG. 8 from the perspective of the terminal device, and the wireless communication method according to the embodiment of the present application is described in detail below in conjunction with FIG. 9 from the perspective of the network device. It should be understood that the description on the network device side and the description on the terminal device side correspond to each other, and similar descriptions can be referred to above. To avoid repetition, details are not repeated here.

FIG. 9 is a schematic flowchart of a wireless communication method provided by an embodiment of this application. The method 300 may be executed by a network device in the communication system shown in FIG. 1. As shown in FIG. 9, the method 300 may include at least part of the following content:

S310: The network device determines a target TRP for PDSCH transmission according to the channel information of the TRPs of multiple transmission receiving points.

S320: Determine, according to the target TRP, a transmission configuration indication TCI in the first downlink control information DCI for scheduling the PDSCH;

S330. Determine, according to the target TRP, first demodulation reference signal DMRS port indication information in the first DCI, where the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

S340. The network device sends the PDSCH based on the at least one DMRS port.

Therefore, in this embodiment of the application, the network device can configure the terminal device to dynamically select the currently used target TCI state from the multiple candidate TCI states indicated by the DCI through the DMRS port indication information, thereby dynamically selecting the corresponding TRP for downlink data transmission , Which can support dynamic transmission point switching between DPS and non-coherent multi-point simultaneous transmission NC-JT in the downlink, which is beneficial to improve throughput and improve PDSCH transmission performance.

It should be understood that in this embodiment of the application, the network device may first determine the TCI in the DCI according to the target TRP, and then determine the first DMRS port indication information according to the target TRP, or may also determine the first DMRS port indication first Information, and then determine the TCI, or both can be performed at the same time, which is not limited in the embodiment of the present application.

Optionally, in some embodiments, the TCI is used to indicate multiple candidate TCI states in multiple sets of TCI states, and the multiple candidate TCI states include the target TCI state corresponding to the target TRP.

Optionally, in some embodiments, the first DMRS port indication information is used by the terminal device to determine the target TCI state corresponding to the PDSCH from the multiple candidate TCI states indicated by the TCI.

Optionally, in some embodiments, the determining the first demodulation reference signal DMRS port indication information in the first DCI according to the target TRP includes:

If the number of the target TRP is one, the network device determines that the at least one DMRS port indicated by the first DMRS port indication information belongs to a CDM group; or

If the number of the target TRP is multiple, the network device determines that the at least one DMRS port indicated by the first DMRS port indication information belongs to multiple CDM groups.

Above, in conjunction with Figure 8 and Figure 9, the wireless communication method according to the embodiment of the present application is described from the perspective of the terminal device and the network device respectively. Below, in conjunction with Figure 10, the method according to the embodiment of the present application is described from the perspective of device interaction. Methods of wireless communication.

As shown in FIG. 10, the method 20 includes the following steps:

S21: The network device determines multiple TRPs participating in the downlink multi-TRP transmission of the terminal device, and determines the target TRP used for current PDSCH transmission according to the channel information of each TRP. This corresponds to S310 in the method 300.

For example, the network device can determine the target TRP according to the channel state information (CSI) reported by the terminal device, or the network device can also use the channel reciprocity to obtain the downlink channel information through the uplink signal to determine Target TRP.

Optionally, the network device may determine a TRP with a channel quality indicator (Channel Quantity Indicator, CQI) greater than a specific CQI threshold among the multiple TRPs as the target TRP, or the network device may also determine the TRP Among the multiple TRPs, the TRP whose RSRP is greater than the specific RSRP threshold is determined as the target TRP. Alternatively, the network device may also select the target TRP according to other channel information, which is not limited in the embodiment of the present application.

Optionally, the target TRP may be dynamically changed, that is, the target TRP at different transmission moments may be different. As shown in Figure 11, in different time slots, network devices can use different TRPs to send PDSCH. For example, some time slots use TRP0, some time slots use TRP1, or some time slots use TRP0 and TRP1, so the network The device can flexibly select a TRP with good channel quality for PDSCH transmission according to the current channel conditions, which can increase the transmission rate.

Optionally, in some embodiments, the number of the target TRP may be 1 or 2. That is, the network device may use a single TRP transmission, or may use simultaneous downlink transmission of multiple TRPs.

S22: Determine the TCI in the first DCI for scheduling the PDSCH according to the target TRP. Corresponds to S320 in method 300.

Specifically, the network device can configure N TCI states through radio resource control (Radio Resource Control, RRC) signaling, where N is greater than 1, and then the terminal device can use Media Access Control (MAC) signaling Indicate the M groups of TCI states, where each group of TCI states may include K of the N TCI states, K is the number of TRPs participating in downlink multi-TRP transmission, typically, the M is 8. In this way, the network device can indicate a group of TCI states in the 8 groups of TCI states through the 3-bit TCI information field in the DCI. This set of TCI states includes K candidate TCI states, and the K candidate TCI states include the target TCI state corresponding to the target TRP, or the target TCI state corresponding to the transmission beam of the target TRP transmitting the PDSCH. Typically, the K candidate TCI states include 2 TCI states, which are described below with this assumption. For example, if the target TRP is two TRPs, then the set of TCI states corresponds to these two TRPs, which is an NC-JP scenario; if the target TRP is one TRP, the set of TCI states corresponds to Two candidate TRPs, one of the TCI state (that is, the target TCI state) corresponds to the target TRP, and the other TCI state corresponds to the TRP that does not send PDSCH. This situation is a DPS scenario.

It should be understood that the implementation of determining the TCI according to the TRP depends on the specific implementation of the network device. For example, in some cases, the TCI and the TRP may have a corresponding relationship, and the network device may determine the TCI according to the target TRP.

S23. The network device determines the first DMRS port indication information in the first DCI according to the target TRP. This corresponds to S330 in the method 300.

In this embodiment of the application, the first DMRS port indication information and the TCI are two independent pieces of information in the same DCI. For example, the first DMRS port indication information and the TCI may be carried in the first Different fields of information in DCI.

Optionally, the first DMRS port indication information may be used to indicate the index of the at least one DMRS port. For example, the indication value of the first DMRS port indication information and the index of the at least one DMRS port may have a corresponding relationship, and the at least one indication value may be determined according to the indication value of the first DMRS port indication information and the corresponding relationship. The index of the DMRS port. For example, the first DMRS port indication information is a 4-bit information field, if the 4 bits are 0010, it means that the indication value of the first DMRS port indication information is 2, or if the 4 bits are 1001, Indicates that the indication value of the first DMRS port indication information is 9.

Optionally, the network device may determine at least one DMRS port indicated by the first DMRS port indication information according to the quantity of the target TRP.

For example, if the number of the target TRP is 1, the at least one DMRS port indicated by the first DMRS port indication information may belong to a CDM group. In this case, the at least one DMRS port indication information may be used for the terminal device to determine a target TCI state corresponding to the target TRP from the multiple candidate TCI states indicated by the TCI.

For another example, if the number of target TRPs is greater than 1, then at least one DMRS port indicated by the first DMRS port indication information belongs to multiple CDM groups, that is, downlink data transmitted by different target TRPs need to use different CDM groups. In this case, the at least one DMRS port indication information may be used by the terminal device to determine multiple target TCI states corresponding to the target TRP from the multiple candidate TCI states indicated by the TCI.

S24. The network device sends a first DCI for scheduling PDSCH to the terminal device, where the first DCI includes the TCI and the first DMRS port indication information, and the TCI is used to indicate the states of multiple candidate TCIs , The first DMRS port indication information is used to indicate at least one DMRS port. Correspondingly, the terminal device receives the first DCI used for scheduling PDSCH. This corresponds to S210 in the method 200.

Specifically, the terminal device receives N TCI states configured by the network device through RRC signaling and M groups of TCI states indicated by MAC layer signaling, and each group of TCI states includes K TCI states among the N TCI states, Typical M=8, K=2, the following description is based on this assumption. Correspondingly, the terminal device can determine a set of TCI states from 8 sets of TCI states according to the 3-bit TCI information field in the DCI, that is, the multiple candidate TCI states. It should be understood that, in a specific implementation, it can also be updated. The multiple candidate TCI states are determined among multiple sets of TCI states, for example, M=16, and a 4-bit TCI information field is used.

S25: The terminal device determines a target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to at least one DMRS port indicated by the first DMRS port indication information. This corresponds to S220 in the method 200.

In an implementation manner, the at least one DMRS port belongs to the same CDM group, that is, the PDSCH transmission only occupies the DMRS port in one CDM group. In this case, the PDSCH may only correspond to one TCI state, that is, the PDSCH is transmitted through a single TRP at this time. Specifically, the terminal device determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the CDM group to which the at least one DMRS port belongs.

For example, if the DMRS is a type 1 DMRS, and the multiple candidate TCI states are two TCI states, when the index of the CDM group to which the at least one DMRS port belongs is 0 (for example, the DMRS port index is 0, 1, 4 or 5), the PDSCH corresponds to the first TCI state of the two TCI states, for example, TCI state 0; the index of the CDM group to which the DMRS port belongs is 1 (for example, the DMRS port index is 2, 3, 6 or 7 hours), the PDSCH corresponds to the second TCI state of the two TCI states, for example, TCI state 1. When the DMRS is type 2DMRS, this method can also be used to determine the target TCI state. Table 1 is an example of Type 1 DMRS, an example of TCI status corresponding to different DMRS port configurations, where the number of OFDM symbols is 1.

Table 1

For another example, when the DMRS is a type 2 DMRS, and the multiple TCI states are two TCI states, the index of the CDM group to which the DMRS port belongs is 0 (for example, the DMRS port index is 0, 1, 6 Or 7 hours), the PDSCH corresponds to the first TCI state of the two TCI states; when the index of the CDM group to which the DMRS port belongs is 1 or 2 (for example, the DMRS port index is 2, 3, 4, 5, 8, 9, 10 or 11), the PDSCH corresponds to the second TCI state of the two TCI states. Table 2 is an example of Type 2 DMRS, an example of TCI status corresponding to different DMRS port configurations, where the number of OFDM symbols is 1.

Table 2

In another implementation manner, the terminal device determines the target TCI state corresponding to the PDSCH according to the codeword mapped by the transport layer corresponding to the first DMRS port and the correspondence between the codeword and the TCI state.

Specifically, each DMRS port corresponds to one transmission layer, and if the at least one DMRS port includes m DMRS ports, the m DMRS ports correspond to m transmission layers, where m is greater than or equal to 1. Optionally, the mapping relationship between the transmission layer and the codeword may be: when m is less than 5, all transmission layers (DMRS ports) are mapped to codeword 0; when m is greater than or equal to 5, the first m/2 transmissions Layer (DMRS port) is mapped to codeword 0, and the next m/2 transport layers (DMRS port) are mapped to codeword 1. For example, if the at least one DMRS port is port {0, 2}, the codeword mapped by the corresponding transport layer is codeword 0; or, if the at least one DMRS port is port {0,1,4,2, 3,6}, the first three DMRS ports {0,1,4} correspond to the transport layer 1-3, and are mapped to codeword 0; the last three DMRS ports {2,3,6} correspond to the transport layer 4-6, Map to code word 1.

As an embodiment, the corresponding relationship between the code word and the TCI state may be: code word 0 corresponds to the first TCI state of the two TCI states, and code word 1 corresponds to the second TCI state of the two TCI states. TCI status. In this case, if the transport layer corresponding to at least one DMRS port corresponding to the PDSCH is mapped to two codewords, the PDSCH corresponds to two TCI states, and different DMRS port groups can correspond to different TCI states, thereby enabling Multiple TRPs of PDSCH are transmitted simultaneously.

For example, if the codeword mapped to the transport layer corresponding to the DMRS port set 1 corresponding to the PDSCH is codeword 0, the TCI state corresponding to the DMRS port set 1 of the PDSCH is the first TCI of the two TCI states. State, for example, TCI state 0; the codeword mapped to the transport layer corresponding to the DMRS port set 2 of the PDSCH is codeword 1, and the TCI state corresponding to the DMRS port set 2 of the PDSCH is one of the two TCI states The second TCI state, such as TCI state 1. Table 3 takes Type 1 DMRS as an example, an example of TCI status corresponding to different DMRS port configurations, where the number of OFDM symbols is 1.

table 3

S26: Based on the first DMRS port, the network device uses a determined beam to send the PDSCH from the target TRP.

Wherein, the determined beam corresponds to the target TCI state corresponding to the PDSCH. In this way, the terminal device can detect the PDSCH transmitted by the beam based on the target TCI state.

S27: The terminal device detects the PDSCH according to the target TCI state corresponding to the PDSCH.

For the specific implementation, refer to the related description of the foregoing embodiment, which will not be repeated here.

Based on the above steps, in different time slots, network equipment can use different TRPs to send PDSCH. For example, as shown in Figure 11, some time slots use TRP0, some time slots use TRP1, or some time slots use TRP0 and TRP1, so that network equipment can flexibly select TRPs with good channel quality for PDSCH transmission according to current channel conditions, which can increase the transmission rate.

Therefore, according to the wireless communication method provided in the present application, the terminal device configures the DMRS port used by the current downlink data transmission according to the network device, and determines the current downlink from the multiple candidate TCI states indicated in the DCI for scheduling the downlink data transmission The target TCI state corresponding to the data transmission, so as to perform the detection of the downlink data channel. The network device can configure the terminal device to dynamically select the current target TCI state from the multiple candidate TCI states indicated by the DCI through the DMRS port indication information, so that it can support dynamic transmission point switching DPS and non-coherent multi-point simultaneous transmission of NC- Dynamic switching between JT.

FIG. 12 is a schematic flowchart of another wireless communication method provided by an embodiment of this application. The method 400 may be executed by the terminal device in the communication system shown in FIG. 1. As shown in FIG. 12, the method 400 may include at least part of the following content:

S410. The terminal device receives second downlink control information DCI used to schedule the physical uplink shared channel PUSCH, where the second DCI includes a sounding reference signal resource indicator SRI and a second demodulation reference signal DMRS port indicator information, where the SRI Used to indicate multiple candidate sounding reference signal SRS resources, and the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

S420: The terminal device determines a target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port.

Therefore, in this embodiment of the application, the terminal device determines the current uplink data transmission corresponding to the current uplink data transmission from the multiple candidate SRS resources indicated in the SRI for scheduling the uplink data transmission according to the DMRS port used for the uplink data transmission configured by the network. The target SRS resource, so that the uplink data channel is sent according to the target SRS resource, which is beneficial to improve system performance.

It should be understood that the embodiment of the present application is only described as an example where the upstream channel is PUSCH, and the method disclosed in the embodiment of the present application is also applicable to other uplink channels, which is not limited in the embodiment of the present application.

Optionally, in some embodiments, the terminal device determining the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port includes: according to the at least one DMRS port The code division multiplexing CDM group where it is located, and the correspondence between the CDM group and the SRS resource, determine the target SRS resource corresponding to the PUSCH.

Optionally, in some embodiments, the correspondence relationship includes:

The CDM group with index 0 corresponds to the first SRS resource among the plurality of candidate SRS resources, and the CDM group with index 1 corresponds to the second SRS resource among the plurality of candidate SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource among the plurality of SRS resources, and the CDM group with index 1 or 2 corresponds to the second SRS resource among the plurality of SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource group among the plurality of SRS resources, and the CDM group with index 1 corresponds to the second SRS resource group among the plurality of SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource group in the plurality of SRS resources, and the CDM group with index 1 or 2 corresponds to the second SRS resource group in the plurality of SRS resources.

It should be understood that the foregoing correspondence between the CDM group and the SRS resource is only an example, and the CDM group and the SRS resource may also have other correspondences. For example, the index of the CDM group is 0 corresponding to the second SRS resource among the multiple candidate SRS resources. The index of the CDM group is 1, which corresponds to the first SRS resource among the multiple candidate SRS resources; or, the correspondence may also be: the CDM group with an index of 0 or 1 corresponds to the first SRS resource among the multiple SRS resources There are two SRS resources, and the CDM group with an index of 2 corresponds to the second SRS resource among the multiple SRS resources.

In an implementation manner, the corresponding relationship between the index of the CDM group and the SRS resource or the SRS resource group may be pre-appointed by the terminal device and the network device. In another implementation manner, the corresponding relationship between the index of the CDM group and the SRS resource or the SRS resource group may also be configured by the network device to the terminal device.

Optionally, in some embodiments, the terminal device determining the target SRS resource corresponding to the data channel from the multiple candidate SRS resources according to the at least one DMRS port includes:

Determine the target SRS resource corresponding to the PUSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the SRS resource.

Specifically, each DMRS port can correspond to one transmission layer, the at least one DMRS port can correspond to at least one transmission layer, and the transmission layer can be mapped to a codeword, and the codeword and the SRS resource can have a corresponding relationship. Therefore, according to the The codeword mapped by the transmission layer corresponding to at least one DMRS port, combined with the corresponding relationship, can determine the target SRS resource corresponding to the PDSCH.

Optionally, in some embodiments, the correspondence relationship includes:

Codeword 0 corresponds to the first SRS resource among the plurality of candidate SRS resources, and codeword 1 corresponds to the second SRS resource among the plurality of candidate SRS resources; or,

Codeword 0 corresponds to the first SRS resource group among the plurality of candidate SRS resources, and codeword 1 corresponds to the second SRS resource group among the plurality of candidate SRS resources.

It should be understood that the correspondence between the codeword and the SRS resource is only an example, and the codeword and the SRS resource may also have other correspondences. For example, the codeword 0 corresponds to the second SRS resource among the multiple candidate SRS resources, and the codeword 1 Corresponding to the first SRS resource among multiple candidate SRS resources, etc.

In an implementation manner, the corresponding relationship between the codeword and the SRS resource or SRS resource group may be pre-appointed by the terminal device and the network device. In another implementation manner, the corresponding relationship between the codeword and the SRS resource or SRS resource group may also be configured by the network device to the terminal device.

Optionally, in some embodiments, different SRS resources in the plurality of candidate SRS resources correspond to independent antenna panel identifiers, or different SRS resource groups in the plurality of candidate SRS resources correspond to independent antenna panel identifiers. Antenna panel identification.

In other words, different SRS resources can correspond to different panel IDs, or different resource groups can correspond to different panel IDs.

Optionally, in some embodiments, the method 400 further includes:

The terminal device determines the transmission parameters used to transmit the PUSCH according to the target SRS resource corresponding to the PUSCH, where the transmission parameters include transmission beam, number of transmission layers, antenna port, precoding matrix, transmission power, and transmission antenna At least one item in the panel.

Further, the terminal device may use transmission parameters to send the PUSCH based on the at least one DMRS port, and the network device may detect the PUSCH based on the DMRS port.

The wireless communication method according to the embodiment of the present application is described in detail above with reference to FIG. 12 from the perspective of the terminal device, and the wireless communication method according to the embodiment of the present application is described in detail below in conjunction with FIG. 13 from the perspective of the network device. It should be understood that the description on the network device side and the description on the terminal device side correspond to each other, and similar descriptions can be referred to above. To avoid repetition, details are not repeated here.

FIG. 13 is a schematic flowchart of a wireless communication method provided by an embodiment of this application. The method 300 may be executed by a network device in the communication system shown in FIG. 1. As shown in FIG. 13, the method 500 may include at least part of the following content:

S510: The network device determines a target antenna panel for transmitting the physical uplink shared channel PUSCH according to the channel information of the multiple antenna panels;

S520: Determine, according to the target antenna panel, a sounding reference signal resource indication SRI in the second downlink control information DCI for scheduling the PUSCH;

S530: Determine, according to the target antenna panel, second demodulation reference signal DMRS port indication information in the second DCI, where the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

S540: Detect the PUSCH based on the at least one DMRS port.

Therefore, in this embodiment of the application, the network device can configure the terminal device to dynamically select the currently used target SRS resource from the multiple candidate SRS resources indicated by the DCI through the DMRS port indication information, thereby dynamically selecting the corresponding panel for uplink data transmission , Which can support dynamic switching between single-panel transmission and multi-panel simultaneous transmission in the uplink, which is conducive to improving throughput and improving PUSCH transmission performance.

It should be understood that in this embodiment of the application, the network device may first determine the SRI in the DCI according to the target panel, and then determine the second DMRS port indication information according to the target panel, or may also determine the second DMRS port indication first Information, and then determine the SRI, or the two can be performed at the same time, which is not limited in the embodiment of the present application.

Optionally, in some embodiments, the SRI is used to indicate multiple candidate SRS resources among multiple sounding reference signal SRS resources, and the multiple candidate SRS resources include the target SRS resource transmitted on the target antenna panel .

Optionally, in some embodiments, the second DMRS port indication information is used for the terminal device to determine the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources indicated by the SRI.

Optionally, in some embodiments, the determining the second demodulation reference signal DMRS port indication information in the second DCI according to the target antenna panel includes:

If the number of the target antenna panel is one, the network device determines that the at least one DMRS port indicated by the second DMRS port indication information belongs to a CDM group; or

If there are multiple target antenna panels, the network device determines that the at least one DMRS port indicated by the second DMRS port indication information belongs to multiple CDM groups.

Above, in conjunction with Figure 12 and Figure 13, the wireless communication method according to the embodiment of the present application is described from the perspective of the terminal device and the network device respectively. Below, in conjunction with Figure 14, the wireless communication method according to the embodiment of the present application is described from the perspective of device interaction. Methods of wireless communication. As shown in FIG. 14, the method 40 includes the following steps:

S41: The network device determines multiple panels that the terminal device can use for PUSCH transmission, and determines a target panel for current PUSCH transmission from the channel information of each panel. This corresponds to S510 in the method 500.

For example, the network device may determine the target panel according to the measurement result of the SRS corresponding to each panel; or, use the channel reciprocity to obtain the uplink channel information through the downlink signal, thereby determining the target panel.

Optionally, the network device may determine a panel with a CQI greater than a specific CQI threshold among the multiple panels as the target panel, or the network device may also determine the RSRP of the multiple panels to be greater than a specific RSRP threshold The panel is determined as the target panel. Alternatively, the network device may also select the target panel according to other channel information, which is not limited in the embodiment of the present application.

Optionally, the target panel may be dynamically changed, that is, the target panel at different transmission moments may be different. As shown in Figure 15, in different time slots, the network device can instruct to use different panels to transmit PUSCH. For example, some time slots use panel0, some time slots use panel1, or some time slots use panel0 and panel1, so Network equipment can flexibly select panels with good channel quality for PUSCH transmission according to current channel conditions, which can increase the transmission rate.

Optionally, in some embodiments, the number of the target panels may be 1 or 2. That is, the network device may use a single panel for transmission, or may use downlink simultaneous transmission of multiple panels.

S42. The network device determines the SRI in the second DCI for scheduling the PUSCH according to the target panel. This corresponds to S520 in method 500.

Specifically, the SRI is used by the terminal device to determine a candidate SRS resource from a plurality of SRS resources, and the candidate SRS resource includes a target SRS resource corresponding to the target panel. The candidate SRS resource may be multiple SRS resources or multiple SRS resource groups.

) In one implementation, the network device configures 2 sets of SRS resources through RRC signaling, and each set of SRS resources includes 2 SRS resources and corresponds to a panel; and further uses the 2-bit SRI in the second DCI from the Each of the two sets of SRS resources indicates one SRS resource. For example, each bit can be used to indicate one SRS resource in a set of SRS resources, so that two SRS resources can be determined according to the two bits, each corresponding to a panel, which contains all the SRS resources. The target panel. In this case, the multiple candidate resources indicated by the SRI may correspond to the two SRS resources. Optionally, each group of SRS resources may be a set of SRS resources, for example, a set of SRS resources used for uplink codebook transmission. For example, if the target panel is two panels, then the two SRS resources correspond to the two panels, and the two SRS resources are both target SRS resources; or, if the target panel is one panel, then The two SRS resources correspond to two candidate panels, one SRS resource corresponds to the target panel, which is the target SRS resource, and the other SRS resource corresponds to a panel that does not transmit PUSCH.

In another implementation manner, the network device configures two SRS resource sets through RRC signaling, and each SRS resource set contains four single-port SRS resources corresponding to one panel; further, through the 8-bit data in the second DCI The SRI information field indicates one SRS resource group from the two SRS resource sets. For example, every 4 bits can be used to indicate one SRS resource group in one SRS resource set, so that two SRS resource groups are obtained. One SRS resource group can contain 1-4 SRS resources. In this case, the multiple candidate resources indicated by the SRI may correspond to the two SRS resource groups. Each SRS resource group corresponds to a panel, and the two panels include the target panel. If the target panel is two panels, the two SRS resource groups are both target SRS resources and correspond to these two panels; or, if the target panel is one panel, the two SRS resource groups correspond to Two candidate panels, one of the SRS resource group corresponds to the target panel, which is the target SRS resource, and the other SRS resource group corresponds to the panel that does not send PUSCH.

It should be noted that the above values are examples, and different values can be used in actual implementation.

It should be understood that the implementation manner of determining the SRI according to the panel depends on the specific implementation of the network device. For example, in some cases, the SRI and the panel may have a corresponding relationship, and the network device may determine the SRI according to the target panel.

S43: The network device determines the second DMRS port indication information in the second DCI for scheduling the PUSCH according to the target panel. This corresponds to S530 in method 500.

In this embodiment of the application, the second DMRS port indication information and the SRI are two independent pieces of information in the same DCI. For example, the second DMRS port indication information and the SRI may be carried in the second Different fields of information in DCI.

Optionally, the second DMRS port indication information may be used to indicate the index of the at least one DMRS port. For example, the indicator value of the second DMRS port indicator information and the index of the at least one DMRS port may have a corresponding relationship, and the at least one indicator value may be determined according to the indicator value of the second DMRS port indicator information and the corresponding relationship. The index of the DMRS port. For example, the second DMRS port indication information is a 4-bit information field, if the 4 bits are 0010, it means that the indication value of the second DMRS port indication information is 2, or if the 4 bits are 1001, Indicates that the indication value of the second DMRS port indication information is 9.

Optionally, the network device may determine at least one DMRS port indicated by the second DMRS port indication information according to the number of target panels.

For example, if the number of the target panel is 1, the DMRS port indicated by the second DMRS port indication information belongs to a CDM group. In this case, the second DMRS port indication information may be used for the terminal device to determine an SRS resource or SRS resource group corresponding to the target panel from among the multiple candidate SRS resources indicated by the SRI.

For another example, if the number of target panels is greater than 1, the DMRS port indicated by the second DMRS port indication information belongs to multiple CDM groups, that is, data transmitted by different target panels need to use different CDM groups. In this case, the second DMRS port indication information may be used for the terminal device to determine multiple SRS resources or multiple SRS resource groups corresponding to the target panel from the multiple candidate SRS resources indicated by the SRI.

S44. The network device sends a second DCI for scheduling PUSCH to the terminal device, where the second DCI includes the SRI and the second DMRS port indication information, and the SRI is used to indicate multiple candidate SRS resources , The second DMRS port indication information is used to indicate at least one DMRS port. Correspondingly, the terminal device receives the second DCI used for scheduling PUSCH. This corresponds to S410 in the method 400.

For the specific implementation manner, reference may be made to the relevant descriptions in S42 and S43, which are not repeated here.

Optionally, the multiple candidate SRS resources indicated by the SRS may be multiple SRS resources, or may also be multiple SRS resource groups, for example, the multiple candidate SRS resources may be two SRS resources, or For two SRS resource groups, the multiple candidate SRS resources may belong to the same SRS resource set, or may belong to different SRS resource sets.

Optionally, different SRS resources may correspond to independent panel IDs, or different SRS resource groups may correspond to independent panel IDs. In this way, different SRS resources or SRS resource groups can be transmitted on different panels, and can also be used to represent different panels, so that the terminal device can determine the target used for transmitting PUSCH according to the determined target SRS resource or target SRS resource group panel.

S45: The terminal device determines the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port. Corresponds to S420 in the method 400.

In an implementation manner, the terminal device determines the target SRS resource corresponding to the PUSCH according to the CDM group where the at least one DMRS port is located and the correspondence between the CDM group and the SRS resource. Take the multiple candidate SRS resources as two SRS resources or two SRS resource groups as an example for description.

For example, when the multiple SRS resources are 2 SRS resources and the index of the CDM group is 0 or 1, the corresponding relationship may include: a CDM group with an index of 0 (for example, including a DMRS port index of 0, 1. , 4 or 5 DMRS ports) correspond to the first SRS resource among the multiple candidate SRS resources, and the CDM group with index 1 (for example, including DMRS ports with DMRS port index 2, 3, 6 or 7) corresponds to The second SRS resource among the multiple candidate SRS resources. Table 4 is an example of Type 1 DMRS, an example of SRS resources corresponding to different DMRS ports, where the number of OFDM symbols is one.

Table 4

For another example, if the DMRS is a type 2 DMRS, when the multiple SRS resources are 2 SRS resources and the index of the CDM group is 0 or 1 or 2, the corresponding relationship is: a CDM group with an index of 0 (for example The DMRS port containing the DMRS port index of 0, 1, 6, or 7) corresponds to the first SRS resource among the plurality of candidate SRS resources, and the CDM group with the index of 1 or 2 (for example, the CDM group containing the DMRS port index of 2, 3 , 4, 5, 8, 9, 10 or 11 DMRS ports) correspond to the second SRS resource among the multiple candidate SRS resources. Table 5 takes Type 2 DMRS as an example, an example of SRS resources corresponding to different DMRS port configurations, where the number of OFDM symbols is one.

table 5

For another example, when the multiple SRS resources are two SRS resource groups, and the index of the CDM group is 0 or 1, the correspondence relationship is: the CDM group with an index of 0 corresponds to the multiple candidate SRS resources The first SRS resource group in, the CDM group with index 1 corresponds to the second SRS resource group among the multiple candidate SRS resources.

For another example, if the DMRS is a type 2 DMRS, when the multiple SRS resources are 2 SRS resource groups and the index of the CDM group is 0 or 1 or 2, the correspondence relationship is: the CDM group with an index of 0 corresponds For the first SRS resource group among the plurality of candidate SRS resources, the CDM group with an index of 1 or 2 corresponds to the second SRS resource group among the plurality of candidate SRS resources.

In another implementation manner, the terminal device may determine the target SRS resource corresponding to the PUSCH according to the codeword mapped by the transmission layer corresponding to the at least one DMRS port and the correspondence between the codeword and the SRS resource.

Specifically, each DMRS port corresponds to one transmission layer, and if the at least one DMRS port includes m DMRS ports, the m DMRS ports correspond to m transmission layers, where m is greater than or equal to 1. Optionally, the mapping relationship between the transmission layer and the codeword may be: when m is less than 5, all transmission layers (DMRS ports) are mapped to codeword 0; when m is greater than or equal to 5, the first m/2 transmissions Layer (DMRS port) is mapped to codeword 0, and the next m/2 transport layers (DMRS port) are mapped to codeword 1.

As an embodiment, when the plurality of candidate SRS resources are two SRS resources, the corresponding relationship may be: codeword 0 corresponds to the first SRS resource in the plurality of candidate SRS resources, and codeword 1 corresponds to The second SRS resource among the plurality of candidate SRS resources.

As another embodiment, when the multiple SRS resources are two SRS resource groups, the correspondence relationship is: codeword 0 corresponds to the first SRS resource group in the multiple SRS resources, and codeword 1 corresponds to The second SRS resource group in the plurality of SRS resources. Wherein, different SRS resource groups may belong to different SRS resource sets, which are indicated by the SRI.

For example, if the codeword mapped to the transport layer corresponding to the DMRS port set 1 of the PUSCH is codeword 0, the target SRS resource corresponding to the DMRS port set 1 of the PUSCH is the first SRS of the two SRS resources. Resource, such as SRS resource 0; the codeword mapped by the transport layer corresponding to the DMRS port set 2 of the PUSCH is codeword 1, and the SRS resource corresponding to the DMRS port set 2 of the PUSCH is the one of the two SRS resources The second SRS resource, such as SRS resource 1. As shown in Table 6, when the number of ports is less than 5, all DMRS ports are mapped to codeword 0, corresponding to SRS resource 0; when the number of ports is greater than or equal to 5, the first half of DMRS ports (rounded down) are mapped to codewords 0 corresponds to SRS resource 0, and the second half of the DMRS port (rounded up) is mapped to SRS resource 1 corresponding to codeword 1.

Table 6

Further, in S46, the terminal device determines the transmission parameters used for transmitting the PUSCH according to the target SRS resource corresponding to the PUSCH, where the transmission parameters include the transmission beam, the number of transmission layers, the antenna port, the precoding matrix, At least one of transmission power and transmission antenna panel.

For example, if the PUSCH corresponds to one SRS resource, the terminal device may determine the transmission parameters of the PUSCH transmitted on all DMRS ports according to the SRS resource. Or, if the PUSCH corresponds to multiple SRS resources, different DMRS ports can correspond to different SRS resources or SRS resource groups, and the terminal device determines to transmit on the DMRS port according to the SRS resources or SRS resource groups corresponding to different DMRS ports. Transmission parameters used by PUSCH. The specific determination method may include at least one of the following:

The terminal device may determine the number of resources included in the target SRS resource as the number of transmission layers of the PUSCH;

Determining, by the terminal device, the total number of ports of the target SRS resource as the number of antenna ports of the PUSCH;

The terminal device determines one SRS resource or SRS resource group in the target SRS resource and precoding matrix indicator (Precoding Matrix Indicator, PMI) information as the precoding matrix used for the PUSCH; wherein, different DMRS The SRS resource corresponding to the port is different, and the precoding matrix used can be different.

The terminal device determines the precoding matrix used for transmitting the SRS on the target SRS resource as the precoding matrix used for the PUSCH; wherein, different DMRS ports correspond to different SRS resources, and the precoding matrixes used may be different.

The terminal device determines the transmission beam used for transmitting the SRS on the target SRS resource as the transmission beam for transmitting the PUSCH; wherein, different DMRS ports correspond to different SRS resources, and the used transmission beams may be different.

Determining, by the terminal device, the power control parameter corresponding to the target SRS resource as the power control parameter of the PUSCH;

The terminal device determines the antenna panel used for transmitting the SRS on the target SRS resource as the antenna panel for transmitting the PUSCH. Among them, the SRS resources corresponding to different DMRS ports are different, and the panels used can be different. For example, DMRS port 0 and DMRS port 2 correspond to SRS resource 0 and SRS resource 1, and SRS resource 0 and SRS resource 1 are transmitted on different panels, then DMRS port 0 and port 2 also need to be transmitted on the corresponding panel .

S47: The terminal device sends the PUSCH based on the at least one DMRS port according to the transmission parameter.

S48. The network device detects the PUSCH based on the at least one DMRS port. This corresponds to S540 in method 500.

Based on the above steps, in different time slots, the network device can instruct the terminal device to use different panels to transmit PUSCH. For example, as shown in Figure 15, some time slots use panel0, some time slots use panel1, or some time slots Using panel0 and panel1, the network device can flexibly select a panel with good channel quality for PUSCH transmission according to current channel conditions, which can increase the transmission rate.

Therefore, according to the wireless communication method provided by the present application, the terminal device determines the current uplink from the multiple candidate SRS resources indicated in the DCI for scheduling the downlink data transmission according to the network device's configuration of the DMRS port used for current uplink data transmission The target SRS resource corresponding to the data transmission, so as to perform the transmission of the uplink data channel. Correspondingly, the network device can configure the terminal device to dynamically select the currently used target SRS resource from the multiple candidate SRS resources indicated by the DCI through the DMRS port indication information, so as to realize the connection between supporting single-panel transmission and multi-panel simultaneous transmission in the uplink. Dynamic switching.

The method embodiments of the present application are described in detail above with reference to Figs. 8 to 15, and the device embodiments of the present application are described in detail below in conjunction with Figs. 16 to 22. It should be understood that the device embodiments and the method embodiments correspond to each other and are similar The description can refer to the method embodiment.

FIG. 16 shows a schematic block diagram of a terminal device 600 according to an embodiment of the present application. As shown in FIG. 16, the terminal device 600 includes:

The communication module 610 is configured to receive first downlink control information DCI used to schedule a physical downlink shared channel PDSCH, where the first DCI includes transmission configuration indication TCI and first demodulation reference signal DMRS port indication information, wherein, the TCI is used to indicate multiple candidate TCI states, and the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The determining module 620 is configured to determine the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port.

Optionally, in some embodiments, the determining module 620 is specifically configured to: if the at least one DMRS port belongs to the same code division multiplexing CDM group, the terminal device according to the CDM to which the at least one DMRS port belongs Group, determine the target TCI state corresponding to the PDSCH from the multiple candidate TCI states.

Optionally, in some embodiments, the determining module 620 is specifically configured to:

Optionally, in some embodiments, the determining module 620 is further configured to:

Optionally, in some embodiments, the correspondence relationship includes: codeword 0 corresponds to the first TCI state among the plurality of candidate TCI states, and codeword 1 corresponds to the second TCI state among the plurality of candidate TCI states. TCI status.

Optionally, in some embodiments, the communication module 610 is further configured to:

The PDSCH is detected according to the target TCI state corresponding to the PDSCH.

It should be understood that the terminal device 600 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 600 are to implement the method shown in FIG. 8 respectively. For the sake of brevity, the corresponding process of the terminal equipment in 200 will not be repeated here.

Fig. 17 is a schematic block diagram of a network device according to an embodiment of the present application. The network device 700 in FIG. 17 includes:

The determining module 710 is configured to determine a target TRP for transmitting the PDSCH according to the channel information of the TRPs of multiple transmission receiving points; according to the target TRP, determine the transmission configuration indication in the first downlink control information DCI for scheduling the PDSCH TCI; and according to the target TRP, determine the first demodulation reference signal DMRS port indication information in the first DCI, where the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The communication module 720 is configured to send the PDSCH based on the at least one DMRS port.

Optionally, in some embodiments, the determining module 710 is specifically configured to:

If the number of the target TRP is one, determining that the at least one DMRS port indicated by the first DMRS port indication information belongs to a CDM group; or

If there are multiple target TRPs, it is determined that the at least one DMRS port indicated by the first DMRS port indication information belongs to multiple CDM groups.

It should be understood that the network device 700 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 700 are to implement the method shown in FIG. 9 respectively. For the sake of brevity, the corresponding process of the network equipment in 300 will not be repeated here.

FIG. 18 shows a schematic block diagram of a terminal device 800 according to an embodiment of the present application. As shown in FIG. 18, the terminal device 800 includes:

The communication module 810 is configured to receive second downlink control information DCI for scheduling the physical uplink shared channel PUSCH, where the second DCI includes a sounding reference signal resource indicator SRI and a second demodulation reference signal DMRS port indicator information, where all The SRI is used to indicate multiple candidate sounding reference signal SRS resources, and the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

The determining module 820 is configured to determine the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port.

Optionally, the determining module 820 is further configured to determine the target SRS resource corresponding to the PUSCH according to the code division multiplexing CDM group where the at least one DMRS port is located and the correspondence between the CDM group and the SRS resource.

Optionally, in some embodiments, the correspondence relationship includes:

Optionally, the determining module 820 is further configured to determine the target SRS resource corresponding to the PUSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the SRS resource.

Optionally, in some embodiments, the correspondence relationship includes:

Optionally, in some embodiments, the determining module 820 is further configured to:

According to the target SRS resource corresponding to the PUSCH, determine the transmission parameters used for transmitting the PUSCH, where the transmission parameters include at least one of the transmission beam, the number of transmission layers, the antenna port, the precoding matrix, the transmission power, and the transmission antenna panel. One item.

It should be understood that the terminal device 800 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 800 are to implement the method shown in FIG. 12 respectively. For the sake of brevity, the corresponding process of the terminal equipment in 400 will not be repeated here.

Fig. 19 is a schematic block diagram of a network device according to an embodiment of the present application. The network device 900 of FIG. 19 includes:

The determining module 910 is configured to determine the target antenna panel used to transmit the physical uplink shared channel PUSCH according to the channel information of the multiple antenna panels; according to the target antenna panel, determine the second downlink control information DCI for scheduling the PUSCH Sounding reference signal resource indication SRI; and determining the second demodulation reference signal DMRS port indication information in the second DCI according to the target antenna panel, where the second DMRS port indication information is used to indicate the PUSCH corresponding to the PUSCH At least one DMRS port;

The communication module 920 is configured to detect the PUSCH based on the at least one DMRS port.

Optionally, in some embodiments, the determining module 910 is specifically configured to:

It should be understood that the network device 900 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 900 are to implement the method shown in FIG. 13 respectively. For the sake of brevity, the corresponding process of the network equipment in 500 will not be repeated here.

FIG. 20 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application. The communication device 1000 shown in FIG. 20 includes a processor 1010, and the processor 1010 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 20, the communication device 1000 may further include a memory 1020. The processor 1010 can call and run a computer program from the memory 1020 to implement the method in the embodiment of the present application.

The memory 1020 may be a separate device independent of the processor 1010, or it may be integrated in the processor 1010.

Optionally, as shown in FIG. 20, the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1000 may specifically be a network device of an embodiment of the application, and the communication device 1000 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here .

Optionally, the communication device 1000 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 1000 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.

FIG. 21 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1100 shown in FIG. 21 includes a processor 1110, and the processor 1110 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 21, the chip 1100 may further include a memory 1120. The processor 1110 may call and run a computer program from the memory 1120 to implement the method in the embodiment of the present application.

The memory 1120 may be a separate device independent of the processor 1110, or may be integrated in the processor 1110.

Optionally, the chip 1100 may further include an input interface 1130. The processor 1110 can control the input interface 1130 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1100 may further include an output interface 1140. The processor 1110 can control the output interface 1140 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application. For brevity, details are not described herein again.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For brevity, here is No longer.

It should be understood that the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.

FIG. 22 is a schematic block diagram of a communication system 1200 according to an embodiment of the present application. As shown in FIG. 22, the communication system 1200 includes a terminal device 1210 and a network device 1220.

Wherein, the terminal device 1210 can be used to implement the corresponding function implemented by the terminal device in the above method, and the network device 1220 can be used to implement the corresponding function implemented by the network device in the above method. For brevity, it will not be repeated here. .

It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. In other words, the memory in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application , For the sake of brevity, I will not repeat it here.

The embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For brevity, I won't repeat them here.

The embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process will not be repeated here.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A wireless communication method, characterized in that it comprises:

The terminal device receives the first downlink control information DCI used to schedule the physical downlink shared channel PDSCH, where the first DCI includes transmission configuration indication TCI and first demodulation reference signal DMRS port indication information, where the TCI is used to indicate Multiple candidate TCI states, the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The terminal device determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port.
The method according to claim 1, wherein the terminal device determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port, comprising:

If the at least one DMRS port belongs to the same code division multiplexing CDM group, the terminal device determines the target TCI corresponding to the PDSCH from the multiple candidate TCI states according to the CDM group to which the at least one DMRS port belongs status.
The method according to claim 2, wherein the terminal device determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the CDM group to which the at least one DMRS port belongs, comprising:

If the index of the CDM group to which the at least one DMRS port belongs is 0, the target TCI state corresponding to the PDSCH is the first TCI state among the multiple candidate TCI states, and if the index of the CDM group is 1, The target TCI state corresponding to the PDSCH is the second TCI state among the multiple candidate TCI states; or,

If the index of the CDM group is 0, the target TCI state corresponding to the PDSCH is the first TCI state among the multiple candidate TCI states, and if the index of the CDM group is 1 or 2, the PDSCH The corresponding target TCI state is the second TCI state among the multiple candidate TCI states.
The method according to claim 1, wherein the terminal device determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port, comprising:

Determine the target TCI state corresponding to the PDSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the TCI state.
The method according to claim 4, wherein the corresponding relationship comprises:

Code word 0 corresponds to the first TCI state among the plurality of candidate TCI states, and code word 1 corresponds to the second TCI state among the plurality of candidate TCI states.
The method according to any one of claims 1 to 5, wherein the method further comprises:

The terminal device detects the PDSCH according to the target TCI state corresponding to the PDSCH.
A wireless communication method, characterized in that it comprises:

The terminal device receives the second downlink control information DCI used to schedule the physical uplink shared channel PUSCH, where the second DCI includes sounding reference signal resource indication SRI and second demodulation reference signal DMRS port indication information, where the SRI is used for Indicating multiple candidate sounding reference signal SRS resources, and the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

The terminal device determines the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port.
The method according to claim 7, wherein the terminal device determines the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port, comprising:

Determine the target SRS resource corresponding to the PUSCH according to the code division multiplexing CDM group where the at least one DMRS port is located, and the correspondence between the CDM group and the SRS resource.
The method according to claim 8, wherein the corresponding relationship comprises:

The CDM group with index 0 corresponds to the first SRS resource among the plurality of candidate SRS resources, and the CDM group with index 1 corresponds to the second SRS resource among the plurality of candidate SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource among the plurality of SRS resources, and the CDM group with index 1 or 2 corresponds to the second SRS resource among the plurality of SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource group among the plurality of SRS resources, and the CDM group with index 1 corresponds to the second SRS resource group among the plurality of SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource group in the plurality of SRS resources, and the CDM group with index 1 or 2 corresponds to the second SRS resource group in the plurality of SRS resources.
The method according to claim 7, wherein the terminal device determines the target SRS resource corresponding to the data channel from the multiple candidate SRS resources according to the at least one DMRS port, comprising:

Determine the target SRS resource corresponding to the PUSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the SRS resource.
The method according to claim 10, wherein the corresponding relationship comprises:

Codeword 0 corresponds to the first SRS resource among the plurality of candidate SRS resources, and codeword 1 corresponds to the second SRS resource among the plurality of candidate SRS resources; or,

Codeword 0 corresponds to the first SRS resource group among the plurality of candidate SRS resources, and codeword 1 corresponds to the second SRS resource group among the plurality of candidate SRS resources.
The method according to claim 9 or 11, wherein different SRS resources in the multiple candidate SRS resources correspond to independent antenna panel identifiers, or different SRS in the multiple candidate SRS resources The resource groups correspond to independent antenna panel identifiers.
The method according to any one of claims 7 to 12, wherein the method further comprises:

The terminal device determines the transmission parameters used to transmit the PUSCH according to the target SRS resource corresponding to the PUSCH, where the transmission parameters include transmission beam, number of transmission layers, antenna port, precoding matrix, transmission power, and transmission antenna At least one item in the panel.
A wireless communication method, characterized in that it comprises:

The network equipment determines the target TRP used to transmit PDSCH according to the channel information of the TRPs of multiple transmission receiving points;

Determine, according to the target TRP, a transmission configuration indication TCI in the first downlink control information DCI for scheduling the PDSCH;

Determine, according to the target TRP, first demodulation reference signal DMRS port indication information in the first DCI, where the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The network device transmits the PDSCH based on the at least one DMRS port.
The method according to claim 14, wherein the TCI is used to indicate a plurality of candidate TCI states in a plurality of groups of TCI states, and the plurality of candidate TCI states includes a target TCI state corresponding to the target TRP.
The method according to claim 14 or 15, wherein the first DMRS port indication information is used for the terminal device to determine the target TCI state corresponding to the PDSCH from the multiple candidate TCI states indicated by the TCI .
The method according to any one of claims 14 to 16, wherein the determining the first demodulation reference signal DMRS port indication information in the first DCI according to the target TRP comprises:

If the number of the target TRP is one, the network device determines that the at least one DMRS port indicated by the first DMRS port indication information belongs to a CDM group; or

If the number of the target TRP is multiple, the network device determines that the at least one DMRS port indicated by the first DMRS port indication information belongs to multiple CDM groups.
A wireless communication method, characterized in that it comprises:

The network equipment determines the target antenna panel for transmitting the physical uplink shared channel PUSCH according to the channel information of the multiple antenna panels;

Determine, according to the target antenna panel, a sounding reference signal resource indication SRI in the second downlink control information DCI for scheduling the PUSCH;

Determine, according to the target antenna panel, second demodulation reference signal DMRS port indication information in the second DCI, where the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

The PUSCH is detected based on the at least one DMRS port.
The method according to claim 18, wherein the SRI is used to indicate a plurality of candidate SRS resources in a plurality of sounding reference signal SRS resources, and the plurality of candidate SRS resources include those transmitted on the target antenna panel. Target SRS resource.
The method according to claim 18 or 19, wherein the second DMRS port indication information is used by the terminal device to determine the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources indicated by the SRI .
The method according to any one of claims 18 to 20, wherein the determining the second demodulation reference signal DMRS port indication information in the second DCI according to the target antenna panel comprises:

If the number of the target antenna panel is one, the network device determines that the at least one DMRS port indicated by the second DMRS port indication information belongs to a CDM group; or

If there are multiple target antenna panels, the network device determines that the at least one DMRS port indicated by the second DMRS port indication information belongs to multiple CDM groups.
A terminal device, characterized in that it comprises

The communication module is configured to receive first downlink control information DCI used to schedule the physical downlink shared channel PDSCH, where the first DCI includes transmission configuration indication TCI and first demodulation reference signal DMRS port indication information, wherein the TCI Used to indicate multiple candidate TCI states, and the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The determining module is configured to determine the target TCI state corresponding to the PDSCH from the multiple candidate TCI states according to the at least one DMRS port.
The terminal device according to claim 22, wherein the determining module is specifically configured to: if the at least one DMRS port belongs to the same code division multiplexing CDM group, the terminal device according to the at least one DMRS port The CDM group to which it belongs determines the target TCI state corresponding to the PDSCH from the multiple candidate TCI states.
The terminal device according to claim 23, wherein the determining module is specifically configured to:

If the index of the CDM group to which the at least one DMRS port belongs is 0, the target TCI state corresponding to the PDSCH is the first TCI state among the multiple candidate TCI states, and if the index of the CDM group is 1, The target TCI state corresponding to the PDSCH is the second TCI state among the multiple candidate TCI states; or,

If the index of the CDM group is 0, the target TCI state corresponding to the PDSCH is the first TCI state among the multiple candidate TCI states, and if the index of the CDM group is 1 or 2, the PDSCH The corresponding target TCI state is the second TCI state among the multiple candidate TCI states.
The terminal device according to claim 22, wherein the determining module is further configured to:

Determine the target TCI state corresponding to the PDSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the TCI state.
The terminal device according to claim 25, wherein the correspondence relationship comprises: code word 0 corresponds to the first TCI state of the plurality of candidate TCI states, and code word 1 corresponds to the plurality of candidate TCI states The second TCI state in.
The terminal device according to any one of claims 22 to 26, wherein the communication module is further configured to:

The PDSCH is detected according to the target TCI state corresponding to the PDSCH.
A terminal device, characterized in that it comprises:

The communication module is configured to receive second downlink control information DCI used to schedule the physical uplink shared channel PUSCH, where the second DCI includes a sounding reference signal resource indicator SRI and a second demodulation reference signal DMRS port indicator information, wherein the SRI is used to indicate multiple candidate sounding reference signal SRS resources, and the second DMRS port indication information is used to indicate at least one DMRS port corresponding to the PUSCH;

The determining module is configured to determine the target SRS resource corresponding to the PUSCH from the multiple candidate SRS resources according to the at least one DMRS port.
The terminal device according to claim 28, wherein the determining module is further configured to:

Determine the target SRS resource corresponding to the PUSCH according to the code division multiplexing CDM group where the at least one DMRS port is located, and the correspondence between the CDM group and the SRS resource.
The terminal device according to claim 29, wherein the corresponding relationship comprises:

The CDM group with index 0 corresponds to the first SRS resource among the plurality of candidate SRS resources, and the CDM group with index 1 corresponds to the second SRS resource among the plurality of candidate SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource among the plurality of SRS resources, and the CDM group with index 1 or 2 corresponds to the second SRS resource among the plurality of SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource group among the plurality of SRS resources, and the CDM group with index 1 corresponds to the second SRS resource group among the plurality of SRS resources; or,

The CDM group with index 0 corresponds to the first SRS resource group in the plurality of SRS resources, and the CDM group with index 1 or 2 corresponds to the second SRS resource group in the plurality of SRS resources.
The terminal device according to claim 28, wherein the determining module is further configured to:

Determine the target SRS resource corresponding to the PUSCH according to the codeword mapped by the transport layer corresponding to the at least one DMRS port and the correspondence between the codeword and the SRS resource.
The terminal device according to claim 31, wherein the corresponding relationship comprises:

Codeword 0 corresponds to the first SRS resource among the plurality of candidate SRS resources, and codeword 1 corresponds to the second SRS resource among the plurality of candidate SRS resources; or,

Codeword 0 corresponds to the first SRS resource group among the plurality of candidate SRS resources, and codeword 1 corresponds to the second SRS resource group among the plurality of candidate SRS resources.
The terminal device according to claim 30 or 32, wherein different SRS resources in the multiple candidate SRS resources correspond to independent antenna panel identifiers, or different ones in the multiple candidate SRS resources The SRS resource groups respectively correspond to independent antenna panel identifiers.
The terminal device according to any one of claims 28 to 33, wherein the determining module is further configured to:

According to the target SRS resource corresponding to the PUSCH, determine the transmission parameters used for transmitting the PUSCH, where the transmission parameters include at least one of the transmission beam, the number of transmission layers, the antenna port, the precoding matrix, the transmission power, and the transmission antenna panel. One item.
A network device, characterized by comprising:

The determining module is used to determine the target TRP for transmitting the PDSCH according to the channel information of the TRPs of multiple transmission receiving points; according to the target TRP, determine the transmission configuration indication TCI in the first downlink control information DCI for scheduling the PDSCH And according to the target TRP, determine the first demodulation reference signal DMRS port indication information in the first DCI, where the first DMRS port indication information is used to indicate at least one DMRS port corresponding to the PDSCH;

The communication module is configured to send the PDSCH based on the at least one DMRS port.
The network device according to claim 35, wherein the TCI is used to indicate a plurality of candidate TCI states in a plurality of groups of TCI states, and the plurality of candidate TCI states includes a target TCI state corresponding to the target TRP.
The network device according to claim 35 or 36, wherein the first DMRS port indication information is used by the terminal device to determine the target TCI corresponding to the PDSCH from the multiple candidate TCI states indicated by the TCI status.
The network device according to any one of claims 35 to 37, wherein the determining module is specifically configured to:

If the number of the target TRP is one, determining that the at least one DMRS port indicated by the first DMRS port indication information belongs to a CDM group; or

If there are multiple target TRPs, it is determined that the at least one DMRS port indicated by the first DMRS port indication information belongs to multiple CDM groups.
A network device, characterized by comprising:

The determining module is used to determine the target antenna panel for transmitting the physical uplink shared channel PUSCH according to the channel information of the multiple antenna panels; according to the target antenna panel, determine the detection in the second downlink control information DCI for scheduling the PUSCH Reference signal resource indication SRI; and according to the target antenna panel, determine the second demodulation reference signal DMRS port indication information in the second DCI, where the second DMRS port indication information is used to indicate at least the corresponding PUSCH One DMRS port;

The communication module is configured to detect the PUSCH based on the at least one DMRS port.
The network device according to claim 39, wherein the SRI is used to indicate a plurality of candidate SRS resources in a plurality of sounding reference signal SRS resources, and the plurality of candidate SRS resources include transmission on the target antenna panel. The target SRS resource.
The network device according to claim 39 or 40, wherein the second DMRS port indication information is used by the terminal device to determine the target SRS corresponding to the PUSCH from the multiple candidate SRS resources indicated by the SRI Resources.
The network device according to any one of claims 39 to 41, wherein the determining module is specifically configured to:

If the number of the target antenna panel is one, the network device determines that the at least one DMRS port indicated by the second DMRS port indication information belongs to a CDM group; or

If there are multiple target antenna panels, the network device determines that the at least one DMRS port indicated by the second DMRS port indication information belongs to multiple CDM groups.
A terminal device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any of claims 1 to 6 The method of one, or the method of any one of claims 7 to 13.
A chip, characterized by comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 6, or The method of any one of claims 7-13.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 1 to 6, or any one of claims 7 to 13 The method described in the item.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 6, or the method according to any one of claims 7 to 13 Methods.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 6 or the method according to any one of claims 7 to 13.
A network device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any of claims 14 to 17 The method of one, or the method of any one of claims 18-21.
A chip, characterized by comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 14 to 17, or The method of any one of claims 18-21.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 14 to 17, or any one of claims 18 to 21 The method described in the item.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 14 to 17, or the method according to any one of claims 18 to 21 Methods.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 14 to 17, or the method according to any one of claims 18 to 21.