WO2022056870A1

WO2022056870A1 - Wireless communication method, terminal device, and network device

Info

Publication number: WO2022056870A1
Application number: PCT/CN2020/116306
Authority: WO
Inventors: 方昀; 史志华; 陈文洪; 田杰娇; 黄莹沛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-24
Also published as: CN115956383A

Abstract

Embodiments of the present application provide a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device sends at least one SRS to a network device. The terminal device receives first indication information, the first indication information being used for indicating at least one SRS resource selected from an SRS resource set of the terminal device by the network device according to a channel measurement result for the at least one SRS, and the at least one SRS resource being used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs. Therefore, the method can be flexibly applied to a PUSCH enhanced transmission scheme based on multiple TRPs or a PUSCH transmission scheme based on a single TRP.

Description

Wireless communication method, terminal device and network device

technical field

The embodiments of the present application relate to the field of communication, and more particularly, to a wireless communication method, terminal device, and network device.

Background technique

In Release (R) 16, the enhanced transmission of the Physical Uplink Shared Channel (PUSCH) is: the network device can only indicate one sounding reference through Downlink control information (DCI) signaling Signal (Sounding Reference Signal, SRS) resource, so PUSCH is repeatedly transmitted according to the same SRS resource. In R17, due to the introduction of PUSCH enhancement based on multi (Transmission Receive Point, TRP), when transmitting PUSCH at this time, it is necessary to perform repeated transmission based on different SRS resources, and in the prior art, The case where the network device only indicates one SRS resource through DCI cannot be flexibly applied to the enhanced transmission scheme of PUSCH based on multiple TRPs or the PUSCH transmission scheme based on single TRP.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a wireless communication method, terminal device, and network device, which can be flexibly applied to a multi-TRP-based enhanced PUSCH transmission scheme or a single-TRP-based PUSCH transmission scheme.

In a first aspect, a wireless communication method is provided, including: a terminal device sending at least one SRS to a network device. The terminal device receives the first indication information, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, and the at least one SRS resource is used by the terminal device to Upstream channel transmission of single TRP or multiple TRPs.

In a second aspect, a wireless communication method is provided, including: a network device receiving at least one SRS. The network device measures the respective channels of the at least one SRS to obtain a channel measurement result of the at least one SRS. The network device selects at least one SRS resource from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS. The network device sends first indication information to the terminal device, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, and the at least one SRS resource is used for Terminal equipment to single TRP or multi-TRP uplink channel transmission.

In a third aspect, a terminal device is provided, including: a communication unit configured to: send at least one SRS to a network device. Receive first indication information, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, and the at least one SRS resource is used for the terminal device to a single TRP Or multi-TRP uplink channel transmission.

In a fourth aspect, a network device is provided, including: a communication unit and a processing unit. The communication unit is used to receive at least one SRS. The processing unit is configured to measure the respective channels of the at least one SRS, obtain the channel measurement result of the at least one SRS, and select at least one SRS resource from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS. The communication unit is further configured to send first indication information to the terminal device, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, at least one SRS resource The resources are used for uplink channel transmission from the terminal equipment to a single TRP or multiple TRPs.

In a fifth aspect, a terminal device is provided, including a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.

In a sixth aspect, a network device is provided, including 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 method in the second aspect or each of its implementations.

In a seventh aspect, an apparatus is provided for implementing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.

Specifically, the apparatus includes: a processor for calling and running a computer program from a memory, so that a device installed with the apparatus executes any one of the above-mentioned first to second aspects or each of its implementations method.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.

In a ninth aspect, a computer program product is provided, comprising computer program instructions, the computer program instructions cause a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method in any one of the above-mentioned first to second aspects or the respective implementations thereof.

Through the technical solutions of the first aspect or the second aspect, when the network device selects one SRS resource, the one SRS resource is used for uplink channel transmission from the terminal device to the single transceiver point TRP, and when the network device selects multiple SRS resources When , multiple SRS resources are used for uplink channel transmission from terminal equipment to multiple TRPs. Therefore, it can be flexibly applied to the enhanced transmission scheme of PUSCH based on multiple TRPs or the PUSCH transmission scheme based on single TRP.

Description of drawings

FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

Fig. 2 is the flow chart of the uplink transmission scheme based on codebook;

FIG. 3 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application;

FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application;

FIG. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application;

7 is a schematic structural diagram of a device according to an embodiment of the present application;

FIG. 8 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. With regard to the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The embodiments of the present application may be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (Wideband Code) system Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio Interface (New Radio, NR), evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR) on unlicensed spectrum -U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc., the embodiments of the present application can also be applied to these communications system.

Optionally, the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.

This embodiment of the present application does not limit the applied spectrum. For example, the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.

Exemplarily, a communication system 100 to which this embodiment of the present application is applied 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 referred to as a communication terminal, a terminal). The network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.

FIG. 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. This application The embodiment does not limit this.

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

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device. 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 a communication function, 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, a mobility management entity, etc., which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The embodiments of this application describe various embodiments in conjunction with terminal equipment and network equipment, where: terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in NR networks or Terminal equipment in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN) network, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

A network device can be a device used to communicate with a mobile device. The network device can be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a WCDMA The base station (NodeB, NB) can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device or base station in an NR network ( gNB) or network equipment in the future evolved PLMN network, etc.

In this embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (for example, a frequency domain resource). The cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell), where the small cell can include: Metro cell, Micro cell, Pico cell cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

It should be understood that, in this application, a multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) technology may be used.

Before introducing the technical solutions of the present application, the following first introduces the SRS, the codebook-based uplink transmission scheme, and the indication mode of the SRS resources in the codebook-based uplink transmission scheme:

(1) SRS

The SRS can be used for uplink channel information acquisition, downlink channel information acquisition, and uplink beam management. The New Radio (New Radio, NR) system manages and configures the SRS by means of the SRS resource set. Wherein, according to different purposes, the network device may configure multiple SRS resource sets for the terminal device, each SRS resource set includes one or more SRS resources, and each SRS resource includes 1, 2 or 4 ports. The configuration information of each SRS resource set contains a usage indication, which can be configured as "beamManagement", "codebook", "nonCodebook" or "antennaswitching", which are used for uplink beam management, codebook-based uplink channel information acquisition, non-codebook The uplink channel information acquisition in this uplink transmission scheme and the downlink channel information acquisition based on SRS antenna switching.

(2) Codebook-based uplink transmission scheme

Figure 2 is a flowchart of a codebook-based uplink transmission scheme. As shown in Figure 2, the codebook-based uplink transmission scheme in the NR system R16 includes the following steps:

Step S210: The terminal device sends at least one SRS to the network device according to the SRS resource configured to it by the network device.

Step S220: the network device measures the channel of at least one SRS, obtains a channel measurement result, and selects SRS resources, the number of transmission layers, and the transmission precoding matrix indicator (Transmitted Precoding Matrix Indicator, TPMI) in the SRS set according to the channel measurement result, Demodulation reference signal (Demodulation Reference Sgnal, DMRS) port indication information, PUSCH resource allocation and corresponding modulation and coding strategy (Modulation and Coding Scheme, MCS).

Step S230: The network device sends the DCI to the terminal device.

Wherein, the DCI includes: SRS Resource Indicator (SRS Resource Indicator, SRI), number of transmission layers, TPMI, DMRS port indication information, PUSCH resource allocation and corresponding MCS, where SRI is used to indicate the SRS resource selected by the network device.

Step S240: The terminal device modulates and encodes the data of the PUSCH according to the MCS, and uses the SRI, TPMI and the number of transmission layers to determine the precoding matrix and the number of transmission layers used when the data is sent, and uses the TPMI to select the precoding matrix of the PUSCH from the codebook. Encoder.

Step S250: The terminal device performs precoding and transmission on the PUSCH through the selected precoder according to the precoding matrix and the number of transmission layers.

The DMRS of the PUSCH and the data of the PUSCH use the same precoding.

Step S260: The network device estimates the uplink channel according to the DMRS, and performs demodulation and decoding of the PUSHC data.

It should be understood that, it can be seen from the above codebook-based uplink transmission scheme that in R16, the terminal device performs PUSCH transmission according to one SRS resource.

(3) SRI in the codebook-based uplink transmission scheme

The transmission scheme of PUSCH is configured through high-level signaling. Before the network device configures the uplink transmission scheme for the terminal device through high-level signaling, the network device can only schedule PUSCH through DCI format 0_0 (that is, DCI with format 0_0). There is no SRI in 0_0, and when PUSCH is scheduled by DCI format 0_0, PUSCH uses single-port transmission, that is, the physical uplink control channel ( Physical Uplink Control Channel, PUCCH) same uplink transmit beam.

When the network device schedules the PUSCH through DCI format 0_1 or DCI format 0_2, the SRI is carried in the DCI, and the size of the SRI field is determined according to the usage indication configured by the network device for the SRS resource set and the number of SRS resources in the SRS resource set. . For example: When the usage indication configured by the network device for the SRS resource set is 'codebook', the size of the SRI field is

The corresponding bits are set according to the specifically selected SRS resource. If the number of SRS resources in the SRS resource set is 4, the size of the SRI field is 2 bits, and different bits in the SRI field correspond to different SRS resources, as shown in Table 1:

Table 1

不同比特对应的索引Indexes corresponding to different bits	SRI资源SRI Resources
00	SRI资源0SRI resource 0
11	SRI资源1 SRI Resource 1
22	SRI资源2SRI Resources 2
33	SRI资源4SRI Resources 4

Similarly, if the number of SRS resources in the SRS resource set is 2, the size of the SRI field is 1 bit, and different bits in the SRI field correspond to different SRS resources, as shown in Table 2:

Table 2

不同比特对应的索引Indexes corresponding to different bits	SRI资源SRI Resources
00	SRI资源0SRI resource 0
11	SRI资源1 SRI Resource 1

Similarly, if the number of SRS resources in the SRS resource set is 3, the size of the SRI field is 2 bits, and different bits in the SRI field correspond to different SRS resources, as shown in Table 3: Table 3

不同比特对应的索引Indexes corresponding to different bits	SRI资源SRI Resources
00	SRI资源0SRI resource 0
11	SRI资源1 SRI Resource 1
22	SRI资源2SRI Resources 2
33	预留reserved

To sum up, in R16, when the terminal device sends the PUSCH, it can only transmit according to one SRS resource, and correspondingly, the SRI in the DCI also only indicates one SRS resource. However, in R17, enhanced transmission of PUSCH needs to be performed based on multiple TRPs, which means that the same PUSCH needs to be sent to different TRPs through different beams. In the prior art, the network device only indicates one SRS resource through DCI. It is flexibly applicable to the enhanced transmission scheme of PUSCH based on multiple TRPs or the PUSCH transmission scheme based on single TRP.

In order to solve the above technical problems, the SRI in this application can indicate multiple SRS resources for different services to be applicable to the PUSCH enhanced transmission scheme under multiple TRPs, or indicate one SRS resource to be applicable to the PUSCH enhanced transmission under a single TRP plan.

The technical solution of the present application will be elaborated below:

FIG. 3 is an interaction flowchart of a wireless communication method provided by an embodiment of the present application. As shown in FIG. 3 , the method includes the following steps:

Step S310: The terminal device sends at least one SRS to the network device.

Step S320: The network device measures the respective channels of the at least one SRS, obtains a channel measurement result for the at least one SRS, and selects at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result for the at least one SRS.

Step S330: The network device sends first indication information to the terminal device, where the first indication information is used to indicate at least one SRS resource selected by the network device.

Optionally, the transmission scheme configured by the network device for the uplink channel is a codebook-based uplink transmission scheme.

Optionally, the network device may configure an SRS resource set for the terminal device, and the resource set includes a "codebook" usage indication, indicating that the SRS resource set is used for codebook-based uplink channel information acquisition.

It should be understood that the network device may also configure multiple SRS resource sets for the terminal device, wherein one SRS resource set is selected for acquiring uplink channel information based on the codebook.

Optionally, if the terminal device sends multiple SRSs to the network device, the beams used to transmit these SRSs are different.

Optionally, for any SRS in the above at least one SRS, when the channel measurement result of the SRS satisfies the preset condition, the network device selects the SRS resource corresponding to the SRS. Alternatively, there is a correspondence between the channel measurement result of the SRS and the SRS resource, and the terminal device may select at least one SRS resource in the SRS resource set according to the correspondence and the channel measurement result of the at least one SRS obtained by performing channel measurement.

Optionally, the above-mentioned preset condition may be configured by a network device, and the present application does not limit the specific content of the preset condition.

Optionally, the correspondence between the channel measurement result of the SRS and the SRS resource may also be configured by the network device, and the present application does not limit the specific content of the correspondence.

Optionally, the terminal device may consider service types when selecting SRS resources. For example, some service types require PUSCH transmission under a single TRP, while some service types require PUSCH transmission under multiple TRPs.

It should be understood that the present application does not limit the method for selecting SRS resources in the SRS resource set.

Optionally, the above-mentioned first indication information may be carried in a DCI or a media access control control element (Media Access Control Control Element, MAC CE), which is not limited in this application.

Optionally, the above-mentioned first indication information is SRI.

It should be understood that when the network device selects one SRS resource, the one SRS resource is used for uplink channel transmission from the terminal device to the single transceiver point TRP, and when the network device selects multiple SRS resources, the multiple SRS resources are used for Upstream channel transmission from terminal equipment to multiple TRPs.

Optionally, after the terminal device receives the first indication information, the terminal device may perform uplink channel transmission according to at least one SRS resource. For example, in addition to acquiring the first indication information, the terminal device also acquires the number of transmission layers, TPMI, DMRS port indication information, PUSCH resource allocation and corresponding MCS for any selected SRS resource. The PUSCH data is modulated and encoded, and the first indication information, TPMI and the number of transmission layers are used to determine the precoding matrix and the number of transmission layers used when the data is sent, and the TPMI is used to select the PUSCH precoder from the codebook. The terminal device performs precoding transmission on the PUSCH according to the precoding matrix, the number of transmission layers, and through the selected precoder.

Optionally, the uplink channel may be PUSCH, which is not limited in this application.

It should be understood that the uplink channel transmission in this application refers to the enhanced transmission of the uplink channel. For example, when the uplink channel is the PUSCH, the uplink channel transmission here refers to the enhanced transmission of the PUSCH.

As described above, the first indication information is used to indicate at least one SRS resource selected by the network device, and the at least one SRS resource is used for the uplink channel transmission from the terminal device to a single TRP or multiple TRPs. The following is an example of this indication method. illustrate:

Example 1: The network device can configure the PUSCH uplink transmission scheme as a codebook-based uplink transmission scheme; the network device configures an SRS resource set, the function of the resource set is configured as a codebook, and two SRS resources are configured in the resource set, respectively. are SRS resource 0 and SRS resource 1; the terminal device can send at least one SRS to the network device; the network device measures the respective channels of the at least one SRS according to the at least one SRS, and obtains the channel measurement result of the at least one SRS. The network device selects SRS resource 0 in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS. The network device sends first indication information 00 to the terminal device, where the first indication information 00 is used to indicate the SRS resource 0 selected by the network device. Or, the network device selects SRS resources 0 and 1 in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS. The network device sends first indication information 10 to the terminal device, where the first indication information is used to indicate SRS resource 0 and SRS resource 1 selected by the network device.

The corresponding relationship between the indication information in the SRI field and the SRS resource is shown in Table 4. Table 4

SRI域中的指示信息Indication information in the SRI field	SRS资源SRS Resources
0000	SRS资源0SRS resource 0
0101	SRS资源1 SRS resource 1
1010	SRS资源0和SRS资源1SRS Resource 0 and SRS Resource 1

Based on this, the terminal device may select SRS resource 0 according to the first indication information 00 to perform uplink PUSCH transmission of a single TRP. The terminal device may select SRS resource 0 and SRS resource 1 according to the first indication information 10 to perform uplink PUSCH transmission of multiple TRPs.

Example 2: The network device can configure the PUSCH uplink transmission scheme as a codebook-based uplink transmission scheme; the network device configures an SRS resource set, the function of the resource set is configured as a codebook, and three SRS resources are configured in the resource set, respectively. are SRS resource 0, SRS resource 1, and SRS resource 2; where SRS resource 0 and 1 are two SRS resources with the same beam configuration, and SRS resource 2 and SRS resource 0 and 1 are two SRS resources with different beam configurations, respectively . The terminal device may send at least one SRS to the network device; the network device measures the respective channels of the at least one SRS according to the at least one SRS, and obtains a channel measurement result of the at least one SRS. The network device selects SRS resource 0 and resource 2 in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS. The network device sends first indication information 011 to the terminal device, where the first indication information 011 is used to indicate SRS resource 0 and SRS resource 2 selected by the network device.

The corresponding relationship between the indication information in the SRI field and the SRS resource is shown in Table 5.

table 5

SRI域中的指示信息Indication information in the SRI field	SRS资源SRS Resources
000000	SRS资源0SRS resource 0
001001	SRS资源1 SRS resource 1
010010	SRS资源2SRS resource 2
011011	SRS资源0和SRS资源2SRS Resource 0 and SRS Resource 2
100100	SRS资源1和SRS资源2 SRS Resource 1 and SRS Resource 2

Based on this, the terminal device can select SRS resource 0 and SRS resource 2 according to the first indication information 011 to perform uplink PUSCH transmission of multiple TRPs.

Optionally, the indication field where the first indication information is located, that is, the length of the SRI field is determined according to the number of resources in the SRS resource set. For example, in Example 1, the number of resources in the SRS resource set is 2, and the length of the SRI field is 2 bits, that is, the SRI field occupies 2 bits. For another example, in Example 2, the number of resources in the SRS resource set is 3, The length of the SRI field is 3 bits, that is, the SRI field occupies 3 bits.

Optionally, the network device may send second indication information to the terminal device to indicate SRS resources with the same beam configuration. This enables the terminal device to know which SRS resources correspond to the same beam configuration. For example, in Example 2, SRS resources 0 and 1 are two SRS resources with the same beam configuration.

Optionally, the second indication information is semi-statically configured by the network device through high layer signaling or dynamically configured through physical layer signaling, but is not limited thereto.

Optionally, the higher layer signaling may be RRC signaling.

Optionally, the physical layer signaling may be DCI signaling or MAC CE signaling.

Optionally, the second indication information is spatial relation information (spatial relationinfo) configured by the network device for SRS resources having the same beam configuration.

Optionally, in order to be applicable to a multi-TRP scenario, if the first indication information is used to instruct the network device to select multiple SRS resources in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS, the multiple SRS The resources are multiple SRS resources with different beam configurations, based on which, the terminal device can send the PUSCH to different TRPs through different beams.

To sum up, in this application, the network device sends the first indication information to the terminal device, where the first indication information is used to indicate at least one SRS resource selected by the network device. When the network device selects one SRS resource, the one SRS resource is used for uplink channel transmission from the terminal device to the single transceiver point TRP. When the network device selects multiple SRS resources, the multiple SRS resources are used for the terminal device to multiple TRPs transmission on the upstream channel. Therefore, it can be flexibly applied to the enhanced transmission scheme of PUSCH based on multiple TRPs or the PUSCH transmission scheme based on single TRP.

FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in FIG. 4 , the terminal device 400 includes: a communication unit 410 configured to send at least one SRS to the network device and receive first indication information, where the first indication information is used to instruct the network device to measure the at least one SRS according to the channel measurement result At least one SRS resource selected in the SRS resource set of the terminal equipment, at least one SRS resource is used for uplink channel transmission from the terminal equipment to a single TRP or multiple TRPs.

Optionally, the length of the indication field where the first indication information is located is determined according to the number of resources in the SRS resource set.

Optionally, the communication unit 410 is further configured to receive second indication information, where the second indication information is used to indicate SRS resources with the same beam configuration.

Optionally, the second indication information is semi-statically configured by the network device through high layer signaling or dynamically configured through physical layer signaling.

Optionally, the second indication information is spatial relationship information configured by the network device for SRS resources having the same beam configuration.

Optionally, if the first indication information is used to instruct the network device to select multiple SRS resources in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS, the multiple SRS resources are multiple SRS resources with different beam configurations. SRS resources.

Optionally, the channel measurement result of at least one SRS has a corresponding relationship with at least one SRS resource.

Optionally, the corresponding relationship is configured by the network device.

Optionally, the first indication information is carried in DCI or MAC CE.

Optionally, the communication unit 410 is further configured to perform uplink channel transmission according to at least one SRS resource.

Optionally, the uplink channel is PUSCH.

Optionally, the SRS resource set is used for codebook-based acquisition of uplink channel information.

Optionally, in some embodiments, the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip. The aforementioned processing unit may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the method embodiment corresponding to FIG. 3 of the present application, and the above-mentioned and other operations and/or functions of the various units in the terminal device 400 are for realizing the above-mentioned figure respectively. 3 The corresponding process of the terminal device in the corresponding method embodiment is not repeated here for brevity.

FIG. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application. As shown in FIG. 5 , the network device 500 includes a communication unit 510 and a processing unit 520 . The communication unit 510 is configured to receive at least one SRS. The processing unit 520 is configured to measure the respective channels of the at least one SRS, obtain a channel measurement result of the at least one SRS, and select at least one SRS resource from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS. The communication unit 510 is further configured to send first indication information to the terminal device, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, at least one SRS resource. SRS resources are used for uplink channel transmission from terminal equipment to single TRP or multiple TRPs.

Optionally, the communication unit 510 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate SRS resources with the same beam configuration.

Optionally, the corresponding relationship is configured by the network device.

Optionally, the first indication information is carried in DCI or MAC CE.

Optionally, the communication unit 510 is further configured to receive uplink channel transmission through at least one SRS resource.

Optionally, the uplink channel is PUSCH.

It should be understood that the network device 500 according to the embodiments of the present application may correspond to the method embodiments on the network device side, and the foregoing and other operations and/or functions of each unit in the network device 500 are respectively implemented to implement the foregoing method on the network device side. The corresponding flow of the network device in the example is not repeated here for brevity.

FIG. 6 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application. The communication device 600 shown in FIG. 6 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 6 , the communication device 600 may further include a memory 620 . The processor 610 may call and run a computer program from the memory 620 to implement the methods in the embodiments of the present application.

The memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .

Optionally, as shown in FIG. 6 , the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.

Among them, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 600 may specifically be the network device in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 600 may specifically be a terminal device in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the terminal device in each method in the embodiment of the present application. For the sake of brevity, details are not repeated here. .

FIG. 7 is a schematic structural diagram of an apparatus according to an embodiment of the present application. The apparatus 700 shown in FIG. 7 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 7 , the apparatus 700 may further include a memory 720 . The processor 710 may call and run a computer program from the memory 720 to implement the methods in the embodiments of the present application.

The memory 720 may be a separate device independent of the processor 710 , or may be integrated in the processor 710 .

Optionally, the apparatus 700 may further include an input interface 730 . The processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.

Optionally, the apparatus 700 may further include an output interface 740 . The processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the apparatus can be applied to the network equipment in the embodiments of the present application, and the apparatus can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application, which are not repeated here for brevity.

Optionally, the apparatus may be applied to the terminal equipment in the embodiments of the present application, and the apparatus may implement the corresponding processes implemented by the terminal equipment in each method of the embodiments of the present application, which will not be repeated here for brevity.

Optionally, the device mentioned in the embodiment of the present application may also be a chip. For example, it can be a system-on-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.

FIG. 8 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application. As shown in FIG. 8 , the communication system 800 includes a terminal device 810 and a network device 820 .

The terminal device 810 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 820 can be used to implement the corresponding functions implemented by the network device or the base station in the above method. Repeat.

It should be understood that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. 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 this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above memory is an example but not a limitative description, for example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a 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) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

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

Optionally, the computer-readable storage medium can be applied to the network device or the base station in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device or the base station in each method of the embodiments of the present application, in order to It is concise and will not be repeated here.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.

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

Optionally, the computer program product can be applied to the network device or the base station in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device or the base station in the various methods of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.

The embodiments of the present application also provide a computer program.

Optionally, the computer program can be applied to the network device or the base station in the embodiments of the present application, and when the computer program runs on the computer, the computer can execute the corresponding methods implemented by the network device or the base station in each method of the embodiments of the present application. The process, for the sake of brevity, will not be repeated here.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application. The corresponding process, for the sake of brevity, will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of 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 components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. For such understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: 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 codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A wireless communication method, comprising:

The terminal device sends at least one sounding reference signal SRS to the network device;

The terminal device receives first indication information, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS , the at least one SRS resource is used for uplink channel transmission from the terminal device to a single transceiver point TRP or multiple TRPs.
The method according to claim 1, wherein the length of the indication field where the first indication information is located is determined according to the number of resources in the SRS resource set.
The method according to claim 1 or 2, further comprising:

The terminal device receives second indication information, where the second indication information is used to indicate SRS resources with the same beam configuration.
The method according to claim 3, wherein the second indication information is semi-statically configured by the network device through high layer signaling or dynamically configured through physical layer signaling.
The method according to claim 3 or 4, wherein the second indication information is spatial relationship information configured by the network device for the SRS resources having the same beam configuration.
The method according to any one of claims 1-5, wherein, if the first indication information is used to instruct the network device to use the SRS of the terminal device according to the channel measurement result of the at least one SRS The multiple SRS resources selected in the resource set are multiple SRS resources with different beam configurations.
The method according to any one of claims 1-6, wherein the channel measurement result of the at least one SRS has a corresponding relationship with the at least one SRS resource.
The method according to claim 7, wherein the corresponding relationship is configured by the network device.
The method according to any one of claims 1-8, wherein the first indication information is carried in downlink control signaling DCI or medium access control control element MAC CE.
The method according to any one of claims 1-9, wherein after the terminal device receives the first indication information, the method further comprises:

The terminal device performs uplink channel transmission according to the at least one SRS resource.
The method according to any one of claims 1-10, wherein the uplink channel is a physical uplink shared channel PUSCH.
The method according to any one of claims 1-11, wherein the SRS resource set is used to acquire uplink channel information based on codebook transmission.
A wireless communication method, comprising:

The network device receives at least one SRS;

The network device measures the respective channels of the at least one SRS to obtain a channel measurement result of the at least one SRS;

The network device selects at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS;

The network device sends first indication information to the terminal device, where the first indication information is used to instruct the network device to select from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS at least one SRS resource, the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.
The method according to claim 13, wherein the length of the indication field where the first indication information is located is determined according to the number of resources in the SRS resource set.
The method of claim 13 or 14, further comprising:

The network device sends second indication information to the terminal device, where the second indication information is used to indicate SRS resources with the same beam configuration.
The method according to claim 15, wherein the second indication information is semi-statically configured by the network device through high layer signaling or dynamically configured through physical layer signaling.
The method according to claim 15 or 16, wherein the second indication information is spatial relationship information configured by the network device for the SRS resources with the same beam configuration.
The method according to any one of claims 13-17, wherein, if the first indication information is used to instruct the network device to use the SRS of the terminal device according to the channel measurement result of the at least one SRS The multiple SRS resources selected in the resource set are multiple SRS resources with different beam configurations.
The method according to any one of claims 13-18, wherein the channel measurement result of the at least one SRS has a corresponding relationship with the at least one SRS resource.
The method according to claim 19, wherein the corresponding relationship is configured by the network device.
The method according to any one of claims 13-20, wherein the first indication information is carried in DCI or MAC CE.
The method according to any one of claims 13-21, further comprising:

The network device receives the uplink channel transmission through the at least one SRS resource.
The method according to any one of claims 13-22, wherein the uplink channel is PUSCH.
The method according to any one of claims 13-23, wherein the SRS resource set is used for codebook-based acquisition of uplink channel information.
A terminal device, characterized in that it includes: a communication unit for:

Send at least one SRS to the network device;

Receive first indication information, where the first indication information is used to instruct the network device to select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, the at least one SRS resource One SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.
The terminal device according to claim 25, wherein the length of the indication field in which the first indication information is located is determined according to the number of resources in the SRS resource set.
The terminal device according to claim 25 or 26, wherein,

The communication unit is further configured to receive second indication information, where the second indication information is used to indicate SRS resources with the same beam configuration.
The terminal device according to claim 27, wherein the second indication information is semi-statically configured by the network device through high layer signaling or dynamically configured through physical layer signaling.
The terminal device according to claim 27 or 28, wherein the second indication information is spatial relationship information configured by the network device for the SRS resources with the same beam configuration.
The terminal device according to any one of claims 25 to 29, wherein if the first indication information is used to instruct the network device to perform a channel measurement of the at least one SRS in the terminal device's For the selected multiple SRS resources in the SRS resource set, the multiple SRS resources are multiple SRS resources with different beam configurations.
The terminal device according to any one of claims 25-30, wherein the channel measurement result of the at least one SRS has a corresponding relationship with the at least one SRS resource.
The terminal device according to claim 31, wherein the corresponding relationship is configured by the network device.
The terminal device according to any one of claims 25-32, wherein the first indication information is carried in DCI or MAC CE.
The terminal device according to any one of claims 25-33, wherein,

The communication unit is further configured to perform uplink channel transmission according to the at least one SRS resource.
The terminal device according to any one of claims 25-34, wherein the uplink channel is PUSCH.
The terminal device according to any one of claims 25-35, wherein the SRS resource set is used to acquire uplink channel information based on a codebook.
A network device, comprising: a communication unit and a processing unit;

the communication unit is configured to receive at least one SRS;

The processing unit is configured to measure the respective channels of the at least one SRS, obtain a channel measurement result of the at least one SRS, and use the SRS resource of the terminal device according to the channel measurement result of the at least one SRS. centrally select at least one SRS resource;

The communication unit is further configured to send first indication information to the terminal device, where the first indication information is used to instruct the network device to use the SRS resource of the terminal device according to the channel measurement result of the at least one SRS At least one selected SRS resource is concentrated, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.
The network device according to claim 37, wherein the length of the indication field where the first indication information is located is determined according to the number of resources in the SRS resource set.
The network device according to claim 37 or 38, characterized in that,

The communication unit is further configured to send second indication information to the terminal device, where the second indication information is used to indicate SRS resources with the same beam configuration.
The network device according to claim 39, wherein the second indication information is semi-statically configured by the network device through high layer signaling or dynamically configured through physical layer signaling.
The network device according to claim 39 or 40, wherein the second indication information is spatial relationship information configured by the network device for the SRS resources having the same beam configuration.
The network device according to any one of claims 37-41, wherein if the first indication information is used to instruct the network device to perform a channel measurement of the at least one SRS in the terminal device's For the selected multiple SRS resources in the SRS resource set, the multiple SRS resources are multiple SRS resources with different beam configurations.
The network device according to any one of claims 37-42, wherein the channel measurement result of the at least one SRS has a corresponding relationship with the at least one SRS resource.
The network device according to claim 43, wherein the corresponding relationship is configured by the network device.
The network device according to any one of claims 37-44, wherein the first indication information is carried in DCI or MAC CE.
The network device according to any one of claims 37-45, wherein,

The communication unit is further configured to receive uplink channel transmission through the at least one SRS resource.
The network device according to any one of claims 37-46, wherein the uplink channel is PUSCH.
The network device according to any one of claims 37-47, wherein the SRS resource set is used for codebook-based acquisition of uplink channel information.
A terminal device, characterized in that it comprises: 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 one of claims 1 to 12. one of the methods described.
A network device, characterized in that it comprises: 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 one of claims 13 to 24. one of the methods described.
A chip, characterized by comprising: a processor for calling and running 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 12.
A chip, characterized by comprising: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 13 to 24.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 12.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 13 to 24.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 1 to 12.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 13 to 24.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 12.
A computer program, characterized in that the computer program causes a computer to perform the method as claimed in any one of claims 13 to 24.