Wireless communication method, terminal device and network device

Abstract

The embodiment of the present application provides a wireless communication method, a terminal device and a network device, the method comprising: the terminal device sends at least one SRS to the network device. The terminal device receives first indication information, the first indication information is used to indicate the network device to select at least one SRS resource in the SRS resource set of the terminal device based on the channel measurement result of at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs. Thus, it can be flexibly applied to an enhanced transmission scheme for PUSCH based on multiple TRPs or a PUSCH transmission scheme based on a single TRP.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and more specifically, to a wireless communication method, a terminal device, and a network device. Background Art

[0002] In Release (R) 16, regarding the enhanced transmission of the Physical Uplink Shared Channel (PUSCH), the network device can only indicate one Sounding Reference Signal (SRS) resource through downlink control signaling (DCI), so PUSCH is repeatedly transmitted based on the same SRS resource. In R17, due to the introduction of PUSCH enhancement based on multiple (multi) Transmission Receive Point (TRP), when transmitting PUSCH, it is necessary to repeatedly transmit based on different SRS resources. However, in the prior art, the situation in which 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 a single TRP. Summary of the invention

[0003] The embodiments of the present application provide a wireless communication method, a terminal device, and a network device, which can be flexibly applied to an enhanced transmission scheme for PUSCH based on multiple TRPs or a PUSCH transmission scheme based on a single TRP.

[0004] In a first aspect, a wireless communication method is provided, including: a terminal device sends at least one SRS to a network device. The terminal device receives first indication information, the first indication information is used to indicate the network device to select at least one SRS resource in the SRS resource set of the terminal device according to a channel measurement result of the at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.

[0005] In a second aspect, a wireless communication method is provided, including: a network device receives at least one SRS. The network device measures the respective channels of at least one SRS to obtain a channel measurement result for 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 at least one SRS. The network device sends first indication information to the terminal device, the first indication information is used to indicate the at least one SRS resource selected by the network device in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.

[0006] In a third aspect, a terminal device is provided, comprising: a communication unit, configured to: send at least one SRS to a network device. Receive first indication information, the first indication information being used to indicate at least one SRS resource selected by the network device in an SRS resource set of the terminal device according to a channel measurement result of the at least one SRS, the at least one SRS resource being used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.

[0007] In a fourth aspect, a network device is provided, comprising: a communication unit and a processing unit. The communication unit is used to receive at least one SRS. The processing unit is used to measure the respective channels of at least one SRS, obtain the channel measurement result of at least one SRS, and select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS. The communication unit is also used to send a first indication information to the terminal device, the first indication information is used to indicate 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 at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.

[0008] In a fifth aspect, a terminal device is provided, comprising a processor and a memory, wherein 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 first aspect or its implementation manners.

[0009] In a sixth aspect, a network device is provided, comprising a processor and a memory, wherein 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 its implementation manners.

[0010] In a seventh aspect, a device is provided for implementing the method in any one of the first to second aspects or any of their implementations.

[0011] Specifically, the apparatus includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the apparatus executes a method as described in any one of the first to second aspects or in each of their implementations.

[0012] In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method of any one of the first to second aspects or any of their implementations.

[0013] In a ninth aspect, a computer program product is provided, comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in any one of the first to second aspects or any of their implementations.

[0014] In a tenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects or in each of their implementations.

[0015] Through the technical solution 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 a single transceiver point TRP, and when the network device selects multiple SRS resources, multiple SRS resources are used for uplink channel transmission from the terminal device to multiple TRPs. Thus, it can be flexibly applied to an enhanced transmission scheme for PUSCH based on multiple TRPs or a PUSCH transmission scheme based on a single TRP. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a communication system architecture provided in an embodiment of the present application;

[0017] Figure 2 is a flow chart of a codebook-based uplink transmission scheme;

[0018] Figure 3 An interactive flow chart of a wireless communication method provided in one embodiment of the present application;

[0019] Figure 4 A schematic block diagram of a terminal device 400 according to an embodiment of the present application is shown;

[0020] Figure 5 A schematic block diagram of a network device 500 according to an embodiment of the present application is shown;

[0021] Figure 6 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application;

[0022] Figure 7 is a schematic structural diagram of a device according to an embodiment of the present application;

[0023] Figure 8 It is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will describe the technical solutions in the embodiments of the present application in conjunction with the 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. For the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR), NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next generation communication system or other communication systems, etc.

[0026] 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 communications, but will 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 communication systems.

[0027] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0028] The embodiments of the present application do not limit the spectrum to which they are applied. For example, the embodiments of the present application can be applied to licensed spectrum or unlicensed spectrum.

[0029] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located in the coverage area.

[0030] Figure 1 One network device and two terminal devices are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0031] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0032] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0033] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] The embodiments of the present application describe various embodiments in combination with terminal devices and network devices, wherein: the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user 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 may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in an NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0035] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, 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 clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0036] The network device can be a device used to communicate with a mobile device. The network device can be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device or base station (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0037] In an 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 (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: a metro cell, a micro cell, a picocell, a femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0038] It should be understood that in the present application, Multiple-Input Multiple-Output (MIMO) technology may be used.

[0039] Before introducing the technical solution of the present application, the following first introduces SRS, a codebook-based uplink transmission scheme, and an indication method of SRS resources in a codebook-based uplink transmission scheme:

[0040] (1)SRS

[0041] SRS can be used for uplink channel information acquisition, downlink channel information acquisition and uplink beam management. The New Radio (NR) system manages and configures SRS in the form of SRS resource sets. According to different uses, the network device can configure multiple SRS resource sets for the terminal device, each SRS resource set includes one or more SRS resources, and each SRS resource contains 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 respectively used for uplink beam management, uplink channel information acquisition based on codebook, uplink channel information acquisition of non-codebook uplink transmission scheme and downlink channel information acquisition based on SRS antenna switching.

[0042] (2) Codebook-based uplink transmission scheme

[0043] Figure 2 is a flowchart of a codebook-based uplink transmission scheme, such as Figure 2 As shown, the codebook-based uplink transmission scheme in NR system R16 includes the following steps:

[0044] Step S210: The terminal device sends at least one SRS to the network device according to the SRS resources configured by the network device.

[0045] Step S220: The network device measures at least one SRS channel to obtain a channel measurement result, and selects SRS resources, transmission layers, transmission precoding matrix indication (TPMI), demodulation reference signal (DMRS) port indication information, PUSCH resource allocation and corresponding modulation and coding strategy (MCS) in the SRS set according to the channel measurement result.

[0046] Step S230: The network device sends DCI to the terminal device.

[0047] The DCI includes: SRS Resource Indicator (SRI), number of transmission layers, TPMI, DMRS port indication information, PUSCH resource allocation and corresponding MCS, wherein SRI is used to indicate the SRS resource selected by the network device.

[0048] Step S240: The terminal device modulates and encodes the PUSCH data 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 sending the data, and uses the TPMI to select the PUSCH precoder from the codebook.

[0049] Step S250: The terminal device performs precoding transmission on the PUSCH according to the precoding matrix, the number of transmission layers, and through the selected precoder.

[0050] The DMRS of the PUSCH and the data of the PUSCH use the same precoding.

[0051] Step S260: The network device estimates the uplink channel according to the DMRS, and demodulates and decodes the PUSHC data.

[0052] It should be understood that, from the above codebook-based uplink transmission scheme, it can be seen that in R16, the terminal device performs PUSCH transmission based on one SRS resource.

[0053] (3) SRI in the codebook-based uplink transmission scheme

[0054] 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 (i.e., DCI with format 0_0). There is no SRI in the DCI format 0_0. When PUSCH is scheduled through DCI format 0_0, PUSCH uses single-port transmission, that is, it uses the same uplink transmit beam as the Physical Uplink Control Channel (PUCCH) with the smallest identifier in the activated uplink (Uplink, UL) partial bandwidth (BandWidth Part, BWP).

[0055] When a network device schedules PUSCH via DCI format 0_1 ​​or DCI format 0_2, the DCI carries SRI, where the size of the SRI field is determined based on 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 specific selected SRS resources. 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:

[0056] Table 1

[0057] Indexes corresponding to different bits SRI Resources 0 SRI Resources0 1 SRI Resource 1 2 SRI Resource 2 3 SRI Resource 4

[0058] 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:

[0059] Table 2

[0060] Indexes corresponding to different bits SRI Resources 0 SRI Resources0 1 SRI Resource 1

[0061] 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

[0062] Indexes corresponding to different bits SRI Resources 0 SRI Resources0 1 SRI Resource 1 2 SRI Resource 2 3 Reserve

[0063] In summary, in R16, when a terminal device sends PUSCH, it can only transmit based on one SRS resource, and accordingly, the SRI in the DCI also only indicates one SRS resource. However, in R17, enhanced transmission of PUSCH based on multiple TRPs is required, which means that the same PUSCH needs to be sent to different TRPs through different beams. In the prior art, the situation 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 a single TRP.

[0064] In order to solve the above technical problems, the SRI in the present 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 scheme under a single TRP.

[0065] The technical solution of this application will be described in detail below:

[0066] Figure 3 An interactive flow chart of a wireless communication method provided in an embodiment of the present application, such as Figure 3 As shown, the method comprises the following steps:

[0067] Step S310: The terminal device sends at least one SRS to the network device.

[0068] Step S320: The network device measures the respective channels of at least one SRS to obtain the channel measurement result of 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 of at least one SRS.

[0069] 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.

[0070] Optionally, the network device configures a transmission scheme for the uplink channel as a codebook-based uplink transmission scheme.

[0071] Optionally, the network device may configure an SRS resource set for the terminal device, wherein the resource set includes a usage indication of a "codebook", indicating that the SRS resource set is used for acquiring uplink channel information based on the codebook.

[0072] 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 a codebook.

[0073] Optionally, if the terminal device sends multiple SRSs to the network device, the beams used to transmit these SRSs are different.

[0074] Optionally, for any one of the at least one SRS, when the channel measurement result of the SRS satisfies a preset condition, the network device selects the SRS resource corresponding to the SRS. Alternatively, there is a corresponding relationship between the channel measurement result of the SRS and the SRS resource, and the terminal device can select at least one SRS resource in the SRS resource set according to the corresponding relationship and the channel measurement result of the at least one SRS obtained by performing channel measurement.

[0075] Optionally, the above preset conditions may be configured by the network device, and this application does not limit the specific content of the preset conditions.

[0076] Optionally, the correspondence between the above SRS channel measurement results and SRS resources may also be configured by the network device, and the present application does not limit the specific content of the correspondence.

[0077] Optionally, the terminal device may consider the service type 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.

[0078] It should be understood that the present application does not limit the method of selecting SRS resources in an SRS resource set.

[0079] Optionally, the first indication information may be carried in a DCI or a Media Access Control Control Element (MAC CE), which is not limited in the present application.

[0080] Optionally, the first indication information is SRI.

[0081] 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 a single transceiver point TRP, and when the network device selects multiple SRS resources, multiple SRS resources are used for uplink channel transmission from the terminal device to multiple TRPs.

[0082] Optionally, after the terminal device receives the first indication information, the terminal device can perform uplink channel transmission according to at least one SRS resource. For example: in addition to obtaining the first indication information, the terminal device also obtains the number of transmission layers, TPMI, DMRS port indication information, PUSCH resource allocation and corresponding MCS for any selected SRS resource. The terminal device can modulate and encode the PUSCH data according to the MCS, and use the first indication information, TPMI and the number of transmission layers to determine the precoding matrix and number of transmission layers used when the data is sent, and use TPMI 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.

[0083] Optionally, the uplink channel may be a PUSCH, which is not limited in the present application.

[0084] It should be understood that the uplink channel transmission in the present application refers to uplink channel enhanced transmission. For example, when the uplink channel is PUSCH, the uplink channel transmission here refers to enhanced transmission of PUSCH.

[0085] 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 uplink channel transmission from the terminal device to a single TRP or multiple TRPs. This indication method is described below by way of example:

[0086] Example 1: The network device may configure the uplink transmission scheme of PUSCH as an uplink transmission scheme based on a codebook; the network device configures an SRS resource set, the role of which is configured as a codebook, and two SRS resources are configured in the resource set, namely, SRS resource 0 and SRS resource 1; the terminal device may send at least one SRS to the network device; the network device measures the channel of 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 the at least one SRS. The network device sends the first indication information 00 to the terminal device, and the first indication information 00 is used to indicate the SRS resource 0 selected by the network device. Alternatively, 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 the at least one SRS. The network device sends the first indication information 10 to the terminal device, and the first indication information is used to indicate the SRS resource 0 and SRS resource 1 selected by the network device.

[0087] The corresponding relationship between the indication information in the SRI domain and the SRS resources is shown in Table 4. Table 4

[0088] Indications in the SRI field SRS Resources 00 SRS Resource 0 01 SRS Resource 1 10 SRS resource 0 and SRS resource 1

[0089] Based on this, the terminal device can select SRS resource 0 for uplink PUSCH transmission of a single TRP according to the first indication information 00. The terminal device can select SRS resource 0 and SRS resource 1 for uplink PUSCH transmission of multiple TRPs according to the first indication information 10.

[0090] Example 2: The network device may configure the uplink transmission scheme of PUSCH as an uplink transmission scheme based on a codebook; the network device configures an SRS resource set, the role of which is configured as a codebook, and three SRS resources are configured in the resource set, namely SRS resource 0, SRS resource 1 and SRS resource 2; wherein SRS resources 0 and 1 are two SRS resources with the same beam configuration, and SRS resource 2 and SRS resources 0 and 1 are two SRS resources with different beam configurations. The terminal device may send at least one SRS to the network device; the network device measures the channel of 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 and resource 2 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 the first indication information 011 to the terminal device, and the first indication information 011 is used to indicate the SRS resource 0 and SRS resource 2 selected by the network device.

[0091] The corresponding relationship between the indication information in the SRI domain and the SRS resources is shown in Table 5.

[0092] Table 5

[0093] Indications in the SRI field SRS Resources 000 SRS Resource 0 001 SRS Resource 1 010 SRS Resource 2 011 SRS resource 0 and SRS resource 2 100 SRS Resource 1 and SRS Resource 2

[0094] Based on this, the terminal device can select SRS resource 0 and SRS resource 2 for uplink PUSCH transmission of multiple TRPs according to the first indication information 011.

[0095] Optionally, the length of the indication field, i.e., the SRI field, where the first indication information is located 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, i.e., the SRI field occupies 2 bits. For another example, in Example 2, the number of resources in the SRS resource set is 3, and the length of the SRI field is 3 bits, i.e., the SRI field occupies 3 bits.

[0096] Optionally, the network device may send second indication information to the terminal device to indicate SRS resources with the same beam configuration, so that the terminal device can 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.

[0097] 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.

[0098] Optionally, the high-layer signaling may be RRC signaling.

[0099] Optionally, the physical layer signaling may be DCI signaling or MAC CE signaling.

[0100] Optionally, the second indication information is spatial relationship information (spatialrelationinfo) configured by the network device for SRS resources with the same beam configuration.

[0101] Optionally, in order to be suitable for the scenario of multiple TRPs, if the first indication information is used to indicate the network device to select multiple SRS resources in the SRS resource set of the terminal device based on the channel measurement result of at least one SRS, then the multiple SRS resources are multiple SRS resources with different beam configurations. Based on this, the terminal device can send PUSCH to different TRPs through different beams.

[0102] In summary, in the present application, the network device sends a first indication information to the terminal device, and 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 a single transceiver point TRP, and when the network device selects multiple SRS resources, multiple SRS resources are used for uplink channel transmission from the terminal device to multiple TRPs. Thus, it can be flexibly applied to an enhanced transmission scheme for PUSCH based on multiple TRPs or a PUSCH transmission scheme based on a single TRP.

[0103] Figure 4 FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. Figure 4 As shown, the terminal device 400 includes: a communication unit 410, used to send at least one SRS to a network device, and receive first indication information, the first indication information is used to indicate the network device to select at least one SRS resource in the SRS resource set of the terminal device based on a channel measurement result of at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.

[0104] 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.

[0105] Optionally, the communication unit 410 is further used to receive second indication information, where the second indication information is used to indicate SRS resources with the same beam configuration.

[0106] Optionally, the second indication information is semi-statically configured by the network device through high-layer signaling or dynamically configured through physical layer signaling.

[0107] Optionally, the second indication information is spatial relationship information configured by the network device for SRS resources having the same beam configuration.

[0108] Optionally, if the first indication information is used to indicate a plurality of SRS resources selected by the network device from an SRS resource set of the terminal device according to a channel measurement result of at least one SRS, the plurality of SRS resources are a plurality of SRS resources with different beam configurations.

[0109] Optionally, the channel measurement result of at least one SRS corresponds to at least one SRS resource.

[0110] Optionally, the correspondence is configured by the network device.

[0111] Optionally, the first indication information is carried in DCI or MAC CE.

[0112] Optionally, the communication unit 410 is further configured to perform uplink channel transmission according to at least one SRS resource.

[0113] Optionally, the uplink channel is PUSCH.

[0114] Optionally, the SRS resource set is used for acquiring uplink channel information based on a codebook.

[0115] Optionally, in some embodiments, the 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 processing unit may be one or more processors.

[0116] It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the present application. Figure 3 The terminal device in the corresponding method embodiment, and the above and other operations and / or functions of each unit in the terminal device 400 are respectively to achieve the above Figure 3 For the sake of brevity, the corresponding processes of the terminal device in the corresponding method embodiment will not be repeated here.

[0117] Figure 5 FIG. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application. Figure 5 As shown, the network device 500 includes a communication unit 510 and a processing unit 520. The communication unit 510 is used to receive at least one SRS. The processing unit 520 is used to measure the respective channels of at least one SRS, obtain the channel measurement result of at least one SRS, and select at least one SRS resource in the SRS resource set of the terminal device according to the channel measurement result of at least one SRS. The communication unit 510 is also used to send a first indication information to the terminal device, and the first indication information is used to indicate 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 at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs.

[0118] 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.

[0119] Optionally, the communication unit 510 is further used 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.

[0120] Optionally, the second indication information is semi-statically configured by the network device through high-layer signaling or dynamically configured through physical layer signaling.

[0121] Optionally, the second indication information is spatial relationship information configured by the network device for SRS resources having the same beam configuration.

[0122] Optionally, if the first indication information is used to indicate a plurality of SRS resources selected by the network device from an SRS resource set of the terminal device according to a channel measurement result of at least one SRS, the plurality of SRS resources are a plurality of SRS resources with different beam configurations.

[0123] Optionally, the channel measurement result of at least one SRS corresponds to at least one SRS resource.

[0124] Optionally, the correspondence is configured by the network device.

[0125] Optionally, the first indication information is carried in DCI or MAC CE.

[0126] Optionally, the communication unit 510 is further configured to receive uplink channel transmission performed through at least one SRS resource.

[0127] Optionally, the uplink channel is PUSCH.

[0128] Optionally, the SRS resource set is used for acquiring uplink channel information based on a codebook.

[0129] Optionally, in some embodiments, the 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 processing unit may be one or more processors.

[0130] It should be understood that the network device 500 according to the embodiment of the present application may correspond to a method embodiment on the network device side, and the above and other operations and / or functions of each unit in the network device 500 are respectively for implementing the corresponding processes of the network device in the method embodiment on the above-mentioned network device side. For the sake of brevity, they will not be repeated here.

[0131] Figure 6 It is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. Figure 6 The communication device 600 shown includes a processor 610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0132] Alternatively, if Figure 6 As shown, 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 method in the embodiment of the present application.

[0133] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0134] Alternatively, if Figure 6 As shown, 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 information or data sent by other devices.

[0135] The transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna, and the number of the antennas may be one or more.

[0136] Optionally, the communication device 600 may specifically be a network device of an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0137] Optionally, the communication device 600 may specifically be a terminal device of an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0138] Figure 7 It is a schematic structural diagram of the device of an embodiment of the present application. Figure 7 The device 700 shown includes a processor 710, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0139] Alternatively, if Figure 7 As shown, 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 method in the embodiment of the present application.

[0140] The memory 720 may be a separate device independent of the processor 710 , or may be integrated into the processor 710 .

[0141] 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 obtain information or data sent by other devices or chips.

[0142] Optionally, the apparatus 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0143] Optionally, the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods in the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0144] Optionally, the apparatus may be applied to a terminal device in an embodiment of the present application, and the apparatus may implement corresponding processes implemented by the terminal device in each method in an embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0145] Optionally, the device mentioned in the embodiments of the present application may also be a chip, for example, a system-on-chip, a system-on-chip, a chip system, or a system-on-chip chip.

[0146] Figure 8 8 is a schematic block diagram of a communication system 800 provided in an embodiment of the present application. Figure 8 As shown, the communication system 800 includes a terminal device 810 and a network device 820 .

[0147] Among them, 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 base station in the above method. For the sake of brevity, they are not repeated here.

[0148] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic 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 processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media 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.

[0149] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0150] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments 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 link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, 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.

[0151] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0152] Optionally, the computer-readable storage medium can be applied to the network device or 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 base station in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0153] 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 the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0154] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0155] Optionally, the computer program product can be applied to the network device or base station in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device or base station in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0156] 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 enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0157] The embodiment of the present application also provides a computer program.

[0158] Optionally, the computer program can be applied to the network device or base station in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device or base station in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0159] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0160] Those of ordinary skill in the art will appreciate 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. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0161] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0162] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0163] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0164] 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 separately, or two or more units may be integrated into one unit.

[0165] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. In view of such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in other words, 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 for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0166] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: 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 indicate at least one SRS resource selected by the network device in the SRS resource set of the terminal device according to a channel measurement result of the at least one SRS, and 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 terminal device receives second indication information, where the second indication information is used to indicate SRS resources having the same beam configuration; The second indication information is the spatial relationship information configured by the network device for the SRS resources with the same beam configuration.

2. The method according to claim 1, characterized in that 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.

3. The method according to claim 1 or 2, characterized in that: The second indication information is semi-statically configured by the network device through high-layer signaling or dynamically configured through physical layer signaling.

4. The method according to claim 1 or 2, characterized in that: If the first indication information is used to indicate a plurality of SRS resources selected by the network device from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, then the plurality of SRS resources are a plurality of SRS resources with different beam configurations.

5. The method according to claim 1 or 2, characterized in that: The channel measurement result of the at least one SRS corresponds to the at least one SRS resource.

6. The method according to claim 5, characterized in that The corresponding relationship is configured by the network device.

7. The method according to claim 1 or 2, characterized in that: The first indication information is carried in downlink control signaling DCI or media access control control element MAC CE.

8. The method according to claim 1 or 2, characterized in that: After the terminal device receives the first indication information, the method further includes: The terminal device performs uplink channel transmission according to the at least one SRS resource.

9. The method according to claim 1 or 2, characterized in that: The uplink channel is a physical uplink shared channel PUSCH.

10. The method according to claim 1 or 2, characterized in that: The SRS resource set is used to obtain uplink channel information based on codebook transmission.

11. A wireless communication method, characterized in that: include: The network device receives at least one SRS; The network device measures a channel of each 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 an SRS resource set of the terminal device according to a 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 indicate at least one SRS resource selected by the network device in the SRS resource set of the terminal device according to a channel measurement result of the at least one SRS, 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 sends second indication information to the terminal device, where the second indication information is used to indicate SRS resources having the same beam configuration; The second indication information is the spatial relationship information configured by the network device for the SRS resources with the same beam configuration.

12. The method according to claim 11, characterized in that 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.

13. The method according to claim 11 or 12, characterized in that: The second indication information is semi-statically configured by the network device through high-layer signaling or dynamically configured through physical layer signaling.

14. The method according to claim 11 or 12, characterized in that: If the first indication information is used to indicate a plurality of SRS resources selected by the network device from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, then the plurality of SRS resources are a plurality of SRS resources with different beam configurations.

15. The method according to claim 11 or 12, characterized in that: The channel measurement result of the at least one SRS corresponds to the at least one SRS resource.

16. The method according to claim 15, characterized in that The corresponding relationship is configured by the network device.

17. The method according to claim 11 or 12, characterized in that: The first indication information is carried in DCI or MAC CE.

18. The method according to claim 11 or 12, characterized in that: Also includes: The network device receives an uplink channel transmission performed through the at least one SRS resource.

19. The method according to claim 11 or 12, characterized in that: The uplink channel is PUSCH.

20. The method according to claim 11 or 12, characterized in that The SRS resource set is used for acquiring uplink channel information based on a codebook.

21. A terminal device, characterized in that: include: Communication unit for: Sending at least one SRS to a network device; Receive first indication information, where the first indication information is used to indicate at least one SRS resource selected by the network device in the SRS resource set of the terminal device according to a channel measurement result of the at least one SRS, and the at least one SRS resource is used for uplink channel transmission from the terminal device to a single TRP or multiple TRPs; receiving second indication information, where the second indication information is used to indicate SRS resources having the same beam configuration; The second indication information is the spatial relationship information configured by the network device for the SRS resources with the same beam configuration.

22. The terminal device according to claim 21, characterized in that: 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.

23. The terminal device according to claim 21 or 22, characterized in that: The second indication information is semi-statically configured by the network device through high-layer signaling or dynamically configured through physical layer signaling.

24. The terminal device according to claim 21 or 22, characterized in that: If the first indication information is used to indicate a plurality of SRS resources selected by the network device from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, then the plurality of SRS resources are a plurality of SRS resources with different beam configurations.

25. The terminal device according to claim 21 or 22, characterized in that: The channel measurement result of the at least one SRS corresponds to the at least one SRS resource.

26. The terminal device according to claim 25, characterized in that: The corresponding relationship is configured by the network device.

27. The terminal device according to claim 21 or 22, characterized in that: The first indication information is carried in DCI or MAC CE.

28. The terminal device according to claim 21 or 22, characterized in that: The communication unit is further configured to perform uplink channel transmission according to the at least one SRS resource.

29. The terminal device according to claim 21 or 22, characterized in that: The uplink channel is PUSCH.

30. The terminal device according to claim 21 or 22, characterized in that: The SRS resource set is used for acquiring uplink channel information based on a codebook.

31. A network device, characterized in that: include: a communication unit and a processing unit; The communication unit is used to receive at least one SRS; The processing unit is used to measure the channel of each of the at least one SRS, obtain the channel measurement result of the at least one SRS, and 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 communication unit is further used to send first indication information to the terminal device, wherein the first indication information is used to indicate at least one SRS resource selected by the network device 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 uplink channel transmission from the terminal device to a single TRP or multiple TRPs; The communication unit is further used 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 second indication information is the spatial relationship information configured by the network device for the SRS resources with the same beam configuration.

32. The network device according to claim 31, characterized in that: 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.

33. The network device according to claim 31 or 32, characterized in that: The second indication information is semi-statically configured by the network device through high-layer signaling or dynamically configured through physical layer signaling.

34. The network device according to claim 31 or 32, characterized in that: If the first indication information is used to indicate a plurality of SRS resources selected by the network device from the SRS resource set of the terminal device according to the channel measurement result of the at least one SRS, then the plurality of SRS resources are a plurality of SRS resources with different beam configurations.

35. The network device according to claim 31 or 32, characterized in that: The channel measurement result of the at least one SRS corresponds to the at least one SRS resource.

36. The network device according to claim 35, characterized in that The corresponding relationship is configured by the network device.

37. The network device according to claim 31 or 32, characterized in that: The first indication information is carried in DCI or MAC CE.

38. The network device according to claim 31 or 32, characterized in that: The communication unit is further configured to receive uplink channel transmission performed via the at least one SRS resource.

39. The network device according to claim 31 or 32, characterized in that: The uplink channel is PUSCH.

40. The network device according to claim 31 or 32, characterized in that: The SRS resource set is used for acquiring uplink channel information based on a codebook.

41. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 10.

42. A network device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 11 to 20.

43. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 10.

44. A chip, characterized in that: The method comprises: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 11 to 20.

45. A computer-readable storage medium, characterized in that Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 10.

46. ​​A computer-readable storage medium, characterized in that Used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 11 to 20.

47. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 1 to 10.

48. A computer program product, characterized in that The method comprises computer program instructions which cause a computer to execute the method as claimed in any one of claims 11 to 20.

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