Transmission method, terminal equipment, network equipment and communication system

Abstract

The present application relates to a transmission method, a terminal device, a network device and a communication system. The transmission method comprises: a terminal device receives channel sounding reference signal SRS resource indication information, the SRS resource indication information is used to indicate the SRS resource to be used by the terminal device for uplink repeated transmission, wherein the SRS resource indication information comprises a first indication and / or at least one second indication, wherein the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the receiving end and / or beam direction targeted by the first transmission are different from the receiving end and / or beam direction targeted by the second transmission.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a transmission method, terminal equipment, network equipment and a communication system. Background Art

[0002] In order to meet the current demands for speed, latency, high-speed mobility, energy efficiency, etc. and to cope with the diversity and complexity of services in future life, the 3GPP (3rd Generation Partnership Project) international standards organization has begun to develop 5G (fifth generation) mobile communication technology. The main application scenarios of 5G include enhanced mobile ultra-wideband (eMBB), ultra reliability and low latency communication (URLLC), and massive machine type communication (mMTC).

[0003] 3GPP R17 enhances PUSCH (Physical Uplink Shared Channel) transmission based on multiple receiving ends (e.g., TRP (Transmission and Reception Point)) to support uplink repeated transmission to multiple receiving ends. However, in the scenario where the terminal device, for example, wants to send the same PUSCH to multiple receiving ends, there is currently no solution for indicating the SRS resources to be used by the terminal device. Summary of the invention

[0004] The embodiments of the present application provide a transmission method, a terminal device, a network device and a communication system, so as to at least provide a solution for indicating the SRS resources to be used by the terminal device in a scenario where the terminal device wants to send the same PUSCH to multiple receiving ends.

[0005] The present application provides a transmission method, including:

[0006] The terminal device receives channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate the SRS resource to be used by the terminal device for uplink repeated transmission.

[0007] The SRS resource indication information includes a first indication and / or at least one second indication, wherein the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, and

[0008] The receiving end and / or beam direction targeted by the first transmission is different from the receiving end and / or beam direction targeted by the second transmission.

[0009] The present application provides a transmission method, including:

[0010] The network device determines channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate the SRS resource used by the terminal device for uplink repeated transmission.

[0011] The SRS resource indication information includes a first indication and / or at least one second indication, wherein the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, and

[0012] The receiving end and / or beam direction targeted by the first transmission is different from the receiving end and / or beam direction targeted by the second transmission.

[0013] The present application provides a terminal device, including:

[0014] a transceiver configured to receive channel sounding reference signal SRS resource indication information, wherein the SRS resource indication information is used to indicate an SRS resource to be used by the terminal device for uplink repeated transmission, wherein the SRS resource indication information includes a first indication and / or at least one second indication; and

[0015] The processor is configured to parse the first indication from the received SRS resource indication information, indicating the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and to parse the second indication indicated in the second indication, indicating the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission.

[0016] The present application provides a network device, including:

[0017] a processor configured to determine channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate an SRS resource to be used by a terminal device for uplink repeated transmission, where the SRS resource indication information includes a first indication and / or at least one second indication; and

[0018] a transceiver configured to send the determined SRS resource indication information to the terminal device,

[0019] Among them, the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the receiving end and / or beam direction targeted by the first transmission is different from the receiving end and / or beam direction targeted by the second transmission.

[0020] The embodiment of the present application provides a terminal device, including a transceiver, 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 transmission method executed by the terminal device.

[0021] The embodiment of the present application provides a network device, including a transceiver, 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 transmission method executed by the above network device.

[0022] The present application provides a communication system, including:

[0023] At least one terminal device as described above; and

[0024] At least one network device as described above.

[0025] An embodiment of the present application provides a chip for implementing the above-mentioned transmission method.

[0026] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned transmission method.

[0027] An embodiment of the present application provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the above-mentioned transmission method.

[0028] An embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned transmission method.

[0029] An embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the above-mentioned transmission method.

[0030] The present application at least provides a solution for indicating the SRS resources to be used by the terminal device, for example, in a scenario where the terminal device wants to send the same PUSCH to multiple receiving ends, thereby at least being able to support uplink repeated transmissions to multiple receiving ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of an application scenario according to an embodiment of the present application.

[0032] Figure 2 It is a schematic flow chart of a transmission method according to an embodiment of the present application.

[0033] Figure 3 is a schematic flowchart of a transmission method according to another embodiment of the present application.

[0034] Figure 4 It is a schematic flowchart of a method for determining a first preset number of transmission layers in a transmission method according to another embodiment of the present application.

[0035] Figure 5 It is a schematic flowchart of a method for determining a first preset number of transmission layers in a transmission method according to another embodiment of the present application.

[0036] Figure 6 It is a schematic diagram of a PDCCH packet structure in the prior art.

[0037] Figure 7 is a schematic diagram of a PDCCH packet structure according to an embodiment of the present application.

[0038] Figure 8 It is a schematic diagram of a PDCCH packet structure according to another embodiment of the present application.

[0039] Fig. 9 It is a schematic diagram of a PDCCH packet structure according to another embodiment of the present application.

[0040] Fig.10 It is a schematic flowchart for determining uplink repeated transmission for a single receiving end and / or a single beam direction in a transmission method according to another embodiment of the present application.

[0041] Fig.11 It is a schematic flowchart of an example of the transmission method of the present application.

[0042] Fig.12 is a schematic flowchart of a transmission method according to another embodiment of the present application.

[0043] Fig.13 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0044] Fig.14 is a schematic block diagram of a network device according to an embodiment of the present application.

[0045] Fig.15 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0046] Fig.16 is a schematic block diagram of a chip according to an embodiment of the present application.

[0047] Fig.17 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0049] The technical solutions of 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) system, NR system evolution system, LTE on 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), 5th-Generation (5G) system or other communication systems.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] The embodiments of the present application describe various embodiments in combination with network devices and terminal 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.

[0054] 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.

[0055] 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, a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0056] 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.

[0057] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0058] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0059] To facilitate understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the present application.

[0060] Figure 1 One network device 110 and two terminal devices 120 are shown exemplarily. Optionally, the wireless communication system 100 may include multiple network devices 110, and each network device 110 may include another number of terminal devices 120 within its coverage area, which is not limited in the embodiments of the present application.

[0061] Optionally, the wireless communication system 100 may also include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), etc., which is not limited in the embodiments of the present application.

[0062] 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.

[0063] Figure 2 is a schematic flow chart of a transmission method 200 according to an embodiment of the present application. The method may optionally be applied to Figure 1 The system shown in the figure is not limited thereto. The method includes at least part of the following contents.

[0064] S210, a terminal device (eg, the aforementioned UE or other communication device) receives SRS (Sounding Reference Signal, channel sounding reference signal) resource indication information.

[0065] The SRS resource indication information is used to indicate the SRS resource used by the terminal device for uplink repetition transmission. Optionally, the SRS resource indication information may be sent by a network device to the terminal device.

[0066] Optionally, according to an embodiment of the present application, the above-mentioned SRS resource indication information may include a first indication and / or at least one second indication.

[0067] The first indication may indicate the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission. The second indication may indicate the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission.

[0068] The receiving end and / or beam direction targeted by the first transmission may be different from the receiving end and / or beam direction targeted by the second transmission. Optionally, the receiving end includes a transmitting receiving point TRP.

[0069] Here, the term "uplink repetition transmission" used in this document may include, for example, repeated transmission of PUSCH, and may also include repeated transmission of packets of other types and / or formats, as long as such packets can be uplink transmitted.

[0070] In the present application, regarding "SRS resource indication information may include a first indication and / or at least one second indication", it may specifically include, for example, the following situations: the SRS resource indication information may include a first indication and at least one second indication; only include a first indication, not including a second indication; and only include at least one second indication, not including a first indication; and so on. In addition, the "at least one second indication" here means that one or more second indications may be included in the SRS resource indication information, wherein each second indication is used for a transmission (second transmission) different from the first transmission associated with the first indication in the uplink repeated transmission. It can be seen that the present application not only supports the scenario of uplink repeated transmission of two receiving ends and / or two beam directions, but can support the scenario of uplink repeated transmission of two or more receiving ends and / or beam directions. In addition, it will be described in subsequent embodiments that the present application can also support the scenario of uplink repeated transmission of a single receiving end and / or a single beam. That is to say, the present application can support the scenario of any number of receiving ends and / or beam directions.

[0071] Optionally, the SRS resource indication information may further include other indications besides the first indication and the second indication.

[0072] Regarding “the receiving end and / or beam direction targeted by the first transmission may be different from the receiving end and / or beam direction targeted by the second transmission”, it may specifically include, for example, the following situations: the receiving end targeted by the first transmission may be different from the receiving end targeted by the second transmission, for example, the first transmission is targeted at receiving end 1, and the second transmission is targeted at receiving end 2; the beam direction targeted by the first transmission may be different from the beam direction targeted by the second transmission, for example, the first transmission is targeted at beam direction 1, and the second transmission is targeted at beam direction 2; the receiving end and beam direction targeted by the first transmission may be different from the receiving end and beam direction targeted by the second transmission, for example, the first transmission is targeted at receiving end 1 and beam direction 1, and the second transmission is targeted at receiving end 2 and beam direction 2; and so on.

[0073] In the above-mentioned embodiment of the present application, the terminal device can determine the SRS resources to be used for uplink repeated transmission based on the received SRS resource indication information, and the receiving end and / or beam direction targeted by the first transmission in the uplink repeated transmission can be different from the receiving end and / or beam direction targeted by the second transmission. Therefore, this embodiment of the present application at least provides a solution for indicating the SRS resources to be used by the terminal device, for example, in a scenario where the terminal device wants to send the same PUSCH to multiple receiving ends, thereby at least being able to support uplink repeated transmission for multiple receiving ends and / or multiple beam directions.

[0074] Optionally, the second indication may include or exclude an indication of the number of transmission layers to be used by the terminal device for the second transmission.

[0075] That is to say, the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission may be indicated in the first indication, and the number of transmission layers to be used by the terminal device for the second transmission may not be indicated in the second indication, but the second SRS resource to be used by the terminal device for the second transmission may be indicated in the second indication. In this way, the number of bits used by the second indication can be reduced, thereby reducing the resource consumption of the second indication, improving the coding rate of the SRS resource indication information, and greatly improving resource utilization. It can be seen that the present application further solves the technical problem of how to improve the coding rate and resource utilization when supporting uplink repeated transmission of multiple receiving ends and / or beam directions in 5G technology. It should be pointed out that the technical problem described here is only an example, and the present application can actually solve other technical problems, so it should not be regarded as a limitation to the present application.

[0076] Optionally, when the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication.

[0077] According to an embodiment of the present application, although the number of transmission layers to be used by the terminal device for the second transmission may not be indicated in the second indication, the terminal device may use the number of transmission layers indicated in the first indication for the second transmission. That is, according to an embodiment of the present application, in a scenario where uplink repeated transmission is performed for multiple receiving ends and / or beam directions, the number of transmission layers may be indicated only in the first indication as the number of transmission layers to be used for each transmission in the uplink repeated transmission. Thereby, the number of bits of the SRS resource indication information can be saved as described above, and the coding rate can be improved.

[0078] In addition, optionally, the SRS resource indication information may include an SRS resource indication (SRS Resource Indicator) field (field) in a PDCCH (Physical Downlink Control Channel, physical downlink control channel), that is, an SRI field. For example, the SRS resource indication information may be an SRI field.

[0079] That is, according to the embodiment of the present application, the terminal device can determine the SRS resources and / or number of transmission layers to be used for uplink repeated transmission through the received SRI field.

[0080] Alternatively, if Figure 3 As shown, according to an embodiment of the present application, the above transmission method may further include:

[0081] S220: Based on the received SRS resource indication information, the terminal device uses the number of transmission layers and the first SRS resource indicated in the first indication to perform the first transmission in a non-codebook manner.

[0082] Similarly, if Figure 3 As shown, according to an embodiment of the present application, the above transmission method may further include:

[0083] S221, based on the received SRS resource indication information, the terminal device uses the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication to perform the second transmission in a non-codebook manner.

[0084] Here, S220 and S221 can be combined into one step, or Figure 3 As shown, these are separate steps, and this application does not impose any limitation on this.

[0085] It can be seen that, in the embodiments of the present application, a non-codebook method can be used to perform the uplink repeated transmission.

[0086] In addition, although an example of using a non-codebook method for uplink repeated transmission is given above, the present application is not limited to using a non-codebook method for uplink repeated transmission, but can also support other transmission methods. As long as the technical solutions conform to the technical ideas of the present application, they fall within the scope of protection of the present application.

[0087] Optionally, the first SRS resource and the second SRS resource are respectively selected from a first SRS resource set and a second SRS resource set configured for the terminal device.

[0088] In this embodiment of the present application, in order to meet the requirements of supporting uplink repeated transmissions of multiple receiving ends and / or different beam directions, two or more SRS resource sets can be set, so that the required SRS resources can be selected from the corresponding SRS resource sets respectively.

[0089] Optionally, the first SRS resource includes one or more SRS resources, and / or the second SRS resource includes one or more SRS resources.

[0090] In this embodiment of the present application, the first SRS resource included in the first indication and the second SRS resource included in the second indication may not be limited to one, but each may be one or more, and the present application has no limitation on this.

[0091] Optionally, according to an embodiment of the present application, the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set may be the same or different.

[0092] In this embodiment of the present application, the number of SRS resources of the first and second SRS resource sets can be set according to actual needs and / or actual circumstances, and their numbers can be equal or unequal, which all fall within the protection scope of the present application.

[0093] Optionally, according to an embodiment of the present application, the number of transmission layers indicated in the first indication does not exceed a preset number of transmission layers.

[0094] In this embodiment of the present application, when setting the number of transmission layers to be used for the first transmission and / or the second transmission, the set number of transmission layers cannot exceed the preset number of transmission layers, that is, it can be less than or equal to the preset number of transmission layers. It can be considered that the "preset number of transmission layers" here is equivalent to the "maximum number of transmission layers that can be set" on the network side, that is, when setting the number of transmission layers required for the uplink repeated transmission of the terminal device, the number of transmission layers cannot exceed the "maximum number of transmission layers that can be set". For example, if the "preset number of transmission layers" is 4, then when setting the number of transmission layers required for the uplink repeated transmission of the terminal device, it can be set to 1 layer, 2 layers, 3 layers, 4 layers, but cannot be set to more than 4 layers. In addition, the specific number of layers to be set for each uplink repeated transmission of the terminal device needs to be considered according to the actual situation, such as it can be determined based on factors such as channel detection, resource usage, transmission priority, etc.

[0095] Optionally, according to an embodiment of the present application, the preset number of transmission layers may be determined by at least one of the following:

[0096] A first preset number of transmission layers L1, where the first preset number of transmission layers L1 may be related to the number of transmission layers that can be supported by the terminal device;

[0097] A second preset number of transmission layers L2, where the second preset number of transmission layers L2 may be a number of transmission layers set for the uplink repeated transmission; and

[0098] A third preset number of transmission layers L3, wherein the third preset number of transmission layers L3 may be determined by at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set.

[0099] In this embodiment of the present application, an exemplary determination method of the preset number of transmission layers is given, that is, it can be determined by the first preset number of transmission layers L1, the second preset number of transmission layers L2, or the third preset number of transmission layers L3 alone, or by any combination of the three, such as a combination of any two of the three, or by the three together, and the present application does not impose any restrictions on this. In addition, the method of determining the preset number of transmission layers in the present application is not limited to the exemplary determination method given here, but can also be determined in other ways.

[0100] The “supportable number of transmission layers” of the terminal device mentioned in the above description of the first preset number of transmission layers L1 relates to the transmission capability of the terminal device.

[0101] The second preset number of transmission layers L2 may be the number of transmission layers set for the uplink repeated transmission. That is, a specific number of transmission layers may be specifically set as the number of transmission layers to be used for the uplink repeated transmission. In this case, the specific number of transmission layers may be directly used as the preset number of transmission layers, or the specific number of transmission layers may be used as an option for selection together with other options (such as the first preset number of transmission layers, the third preset number of transmission layers, etc.) to finally determine the preset number of transmission layers.

[0102] As described above, the third preset number of transmission layers L3 can be determined by at least one of the number of SRS resources of the first SRS resource set and the number of SRS resources of the second SRS resource set, that is, the third preset number of transmission layers L3 can be determined according to the number of SRS resources. Specifically, it may include, for example, determining the third preset number of transmission layers L3 by the number of SRS resources of the first SRS resource set, determining the third preset number of transmission layers L3 by the number of SRS resources of the second SRS resource set, and jointly determining the third preset number of transmission layers L3 by the number of SRS resources of the first SRS resource set and the number of SRS resources of the second SRS resource set.

[0103] Optionally, the first preset number of transmission layers L1 may be determined by the terminal device and then sent to the network device, or the first preset number of transmission layers L1 may be determined by the network device. Wherein, when the terminal device supports the MIMO (Multi-input Multi-output) maximum number of layers (maxMIMO-Layers) and the MIMO maximum number of layers has been configured, the first preset number of transmission layers L1 is the MIMO maximum number of layers, otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

[0104] For example, Figure 4 As shown, optionally, according to an embodiment of the present application, the above transmission method may further include:

[0105] S101, when the terminal device supports a maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the terminal device may determine that the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the terminal device may determine that the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support; and

[0106] S102, the terminal device may send the determined first preset number of transmission layers L1 to the network device.

[0107] Steps S101 and S102 of this embodiment of the present application may be performed before the network side determines the SRS resource indication information (eg, the SRI domain), and further, before the terminal device receives the SRS resource indication information.

[0108] In this embodiment of the present application, when a terminal device such as a UE supports the maximum number of MIMO layers and the maximum number of MIMO layers is configured, the maximum number of MIMO layers can be used as the first preset number of transmission layers L1; otherwise, the maximum number of transmission layers that the UE can support can be used as the first preset number of transmission layers L1.

[0109] Optionally, the maximum number of MIMO layers may be configured through RRC (Radio Resource Control).

[0110] As can be seen from the above, in the embodiment of the present application, the first preset number of transmission layers L1 can be determined by the terminal device itself, and the determined first preset number of transmission layers L1 can be sent to the network device.

[0111] Alternatively, if Figure 5 As shown, according to an embodiment of the present application, the above transmission method may further include:

[0112] S101', the terminal device sends information about whether the terminal device supports the maximum number of MIMO layers and / or whether the maximum number of MIMO layers has been configured, and the maximum number of transmission layers that the terminal device can support, to the network device;

[0113] S102', when the terminal device supports the maximum number of MIMO layers and the maximum number of MIMO layers has been configured, the network device determines the first preset number of transmission layers L1 as the maximum number of MIMO layers; otherwise, the network device determines the first preset number of transmission layers L1 as the maximum number of transmission layers that the terminal device can support.

[0114] In an embodiment of the present application, the terminal device may simply report relevant information (for example, information about whether the terminal device supports the maximum number of MIMO layers and / or whether the maximum number of MIMO layers has been configured, and the maximum number of transmission layers that the terminal device can support, etc.) to the network device, and then the network device determines the first preset number of transmission layers L1.

[0115] In addition, if the network device itself can determine whether the terminal device supports the maximum number of MIMO layers and / or whether the maximum number of MIMO layers has been configured, as well as the maximum number of transmission layers that the terminal device can support, then step S101' may not be required, that is, step S101' is optional (e.g. Figure 5 ).

[0116] As can be seen from the above, whether the first preset number of transmission layers L1 is determined by the terminal device or the network device, the determination logic is similar, that is, when the terminal device can support the maximum number of MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is determined as the maximum number of MIMO layers, otherwise, the first preset number of transmission layers L1 is determined as the maximum number of transmission layers that the terminal device can support. In other words, if the terminal device can support the maximum number of MIMO layers and the maximum number of MIMO layers has been configured, the maximum number of MIMO layers is preferentially used as the first preset number of transmission layers L1, otherwise, the maximum number of transmission layers that the terminal device can support is used as the first preset number of transmission layers L1.

[0117] An example of determining the first preset number of transmission layers L1 is given above, but the present application is not limited thereto, and the first preset number of transmission layers L1 may also be determined in other ways.

[0118] Optionally, according to an embodiment of the present application, the preset number of transmission layers may be the smaller of the first preset number of transmission layers L1 and the second preset number of transmission layers L2. That is, the smaller of the first preset number of transmission layers L1 and the second preset number of transmission layers L2 may be selected as the preset number of transmission layers.

[0119] Optionally, according to an embodiment of the present application, the preset number of transmission layers may be the minimum of the following three:

[0120] The first preset number of transmission layers L1;

[0121] The second preset number of transmission layers L2; ​​and

[0122] The third preset number of transmission layers is L3.

[0123] That is, the smallest of the above three can be selected as the preset number of transmission layers.

[0124] Some examples of determining the preset number of transmission layers are given above, but the present application is not limited to these examples, and other methods of determining the preset number of transmission layers may also be used. That is, a transmission layer value may be preset as the maximum value of the number of transmission layers that can be used by the network side in the present application to set the number of transmission layers for uplink repeated transmission of the terminal device.

[0125] Optionally, according to an embodiment of the present application, the number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication can be determined by the network device through uplink channel detection of the SRS sent by the terminal device.

[0126] A brief description will be given below.

[0127] The SRS channel sounding reference signal can be used for uplink channel information acquisition, downlink channel information acquisition, uplink beam management, etc. The network side can manage and configure the SRS in the form of an SRS resource set.

[0128] For example, according to different purposes, the base station may configure one or more SRS resource sets for the user equipment UE, each SRS resource set may include one or more SRS resources, and each SRS resource may include, for example, 1, 2, 3, 4, ..., or even more ports. Among them, a purpose indication may be included in the configuration information of each SRS resource set, and the purpose indication may be configured as, for example, "beam management", "codebook", "non-codebook", or "antenna switching", which can be 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.

[0129] Regarding the non-codebook transmission scheme mentioned above, the difference between it and the codebook-based uplink transmission scheme is that the precoding of the non-codebook transmission scheme is no longer limited to a limited candidate set based on a fixed codebook, but the uplink precoding matrix is ​​determined by the UE based on channel reciprocity, for example. If the channel reciprocity is good enough, the UE can obtain better uplink precoding. Compared with the codebook-based transmission scheme, the non-codebook transmission scheme can save the overhead of precoding indication and obtain better performance.

[0130] An exemplary transmission process of an uplink non-codebook transmission scheme of a NR (New Radio) system is given below.

[0131] First, the UE may measure a downlink reference signal to obtain a candidate uplink precoding matrix, use the candidate uplink precoding matrix to precode an SRS for a non-codebook uplink transmission scheme, and then send the precoded SRS to the base station.

[0132] The base station can perform uplink channel detection according to the SRS sent by the UE, and based on the result of the uplink channel detection, determine the corresponding SRS resources to be used for the UE's uplink transmission and the MCS (Modulation and Coding Scheme, modulation and coding scheme) level of the uplink transmission, etc., for resource scheduling for the UE, and notify the UE of the determined resource scheduling result. As mentioned above, the SRS resources to be used for the UE's uplink repeated transmission can be indicated or notified to the UE through the SRI field.

[0133] Therefore, the UE can modulate and encode the data according to the MCS in the resource scheduling result sent from the base station and received by the UE, and can determine the precoding and number of transmission layers of the data based on the SRI field in the resource scheduling result, and then perform uplink transmission of the data after precoding the data.

[0134] For non-codebook uplink transmission schemes, the base station may configure at least one SRS resource set for uplink CSI (Channel state information) acquisition for the UE, each resource set may include at least one SRS resource, and each SRS resource may include, for example, 1 SRS port. The SRI field is used to indicate one or more SRS resources for determining PUSCH precoding. Among them, the number of SRS resources indicated by the SRI field may be the number of layers of PUSCH transmission, and the number of PUSCH transmission layers may correspond one-to-one to the SRS resources indicated by the SRI field.

[0135] For non-codebook uplink transmission schemes, the UE can obtain uplink precoding information based on the downlink reference signal based on channel reciprocity. A UE can be configured with multiple downlink reference signals, which can be used for beam management, downlink CSI measurement, and downlink channel demodulation. In order to enable the UE to obtain better candidate precoding for non-codebook uplink transmission schemes, the NR system allows the base station to configure corresponding associated NZP (Non-zero Power) CSI-RS (Reference Signal) resources for channel measurement for each SRS resource set used for the non-codebook uplink transmission scheme. The UE can obtain the precoding for the SRS signal transmission of the SRS resource set for the non-codebook uplink transmission scheme based on the associated NZP CSI-RS resources. When the SRS resource set used for the non-codebook uplink transmission scheme is of a non-periodic time domain type, in order to ensure that the terminal uses the associated NZP CSI-RS resources to determine the processing time required for sending the SRS precoding, the time interval between the last symbol of the associated NZP CSI-RS transmission used to calculate the SRS precoding and the first symbol of the SRS transmission should not be less than 42 OFDM (Orthogonal Frequency Division Multiplexing) symbols. In order to avoid the complexity of terminal storage and processing, and to minimize the delay between SRS transmission and SRS triggering, the NR system stipulates that the associated non-periodic NZP CSI-RS is sent in the time slot that triggers the SRS resource set.

[0136] An example of a transmission process of an uplink non-codebook transmission scheme of an NR (New Radio) system is given above, but the present application is not limited thereto, and other suitable transmission processes may also be adopted.

[0137] Optionally, according to an embodiment of the present application, the first indication and the second indication may be included in the same or different physical downlink control channels PDCCH.

[0138] By including the first indication and the second indication in the same PDCCH, it is convenient for the terminal device to obtain the required number of transmission layers and SRS resource information, and the number of bits can be saved to improve resource utilization. On the other hand, by including the first indication and the second indication in different PDCCHs, data can be transmitted at any time to enhance flexibility.

[0139] Optionally, according to an embodiment of the present application, the first indication and the second indication may be respectively included in different SRS resource indication SRI fields in the same PDCCH, or the first indication and the second indication may be included in the same SRI field in the same PDCCH.

[0140] In this embodiment of the present application, the first indication and the second indication may be placed in the same SRI field in the same PDCCH, or may be placed in different SRI fields of the same PDCCH, and the present application does not impose any restrictions on this.

[0141] To make it easier to understand, Figure 6 The structure of the PDCCH for uplink repeated transmission of a single TRP in the prior art is shown. Figure 7 , 8 9 shows the structure of the PDCCH according to an exemplary embodiment of the present application.

[0142] like Figure 6 As shown, in the prior art, each PDCCH for uplink repeated transmission of a single TRP contains an SRI field (unique SRS resource indication) for indicating the number of transmission layers and SRS resources required for each transmission in the uplink repeated transmission.

[0143] Figure 7 In the structure of the PDCCH shown, the first indication and / or at least one second indication may be included in one PDCCH, that is, one PDCCH may include the first indication or at least one second indication, or may include the first indication and one or more second indications.

[0144] Figure 8 In the structure of the PDCCH shown, the first indication and the second indication are placed separately in different PDCCHs. In the case where there are multiple second indications, the multiple second indications can also be placed separately in different PDCCHs, for example, one PDCCH contains one second indication, or the multiple second indications can be placed together in one PDCH.

[0145] Fig. 9 In the structure of the PDCCH shown, a PDCCH may include an SRI field (such as Fig. 9 ), and may also include multiple SRI domains (such as Fig. 9 That is, the first indication and at least one second indication may both be included in an SRI field in a PDCCH, or may each be included in an SRI field separately.

[0146] What are shown in the figure are some examples, which do not represent all PDCCH structures that can be supported by the present application. In fact, the present application has no restrictions on the storage method of the first indication and the second indication in the PDCCH.

[0147] Optionally, the number of bits of the first indication may be determined based on the following items:

[0148] a preset number of transmission layers or a number of transmission layers to be used for said first transmission, and

[0149] The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

[0150] Optionally, the number of bits of the second indication may be determined based on the following items:

[0151] a preset number of transmission layers or a number of transmission layers to be used for said second transmission, and

[0152] At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set

[0153] In the present application, the number of bits of the first indication and the number of bits of the second indication can be jointly determined by the preset number of transmission layers and the number of SRS resources, or can also be jointly determined by the number of transmission layers and the number of SRS resources to be used for the corresponding transmission. Specifically, it may include, for example, the following situations: both the number of transmission layers (the preset number of transmission layers or the number of transmission layers to be used for the corresponding transmission) and the number of SRS resources of the first SRS resource set; both the number of transmission layers (the preset number of transmission layers or the number of transmission layers to be used for the corresponding transmission) and the number of SRS resources of the second SRS resource set; the number of transmission layers (the preset number of transmission layers or the number of transmission layers to be used for the corresponding transmission) and the number of SRS resources of the first SRS resource set and the number of SRS resources of the second SRS resource set; and so on.

[0154] Although several embodiments for determining the number of bits of the first indication are given above, the present application is not limited thereto, and other methods for determining the number of bits of the first indication may also be adopted.

[0155] From the above, it can be seen that the first indication may include an indication of the number of transmission layers and an indication of the first SRS resource. In the specific case where the second indication only indicates the second SRS resource, the amount of information in the first indication may be larger than the amount of information in the first indication, and accordingly the number of bits of the first indication may be higher than the number of bits of the second indication.

[0156] For easy understanding, an example is given below to more specifically describe how to determine the number of bits of the first indication.

[0157] Regarding the indication of SRS resources in the downlink control channel, the downlink control channel carries the downlink control information sent by the base station to the UE. For example, the SRI field can be set in the DCI to indicate the number of transmission layers and SRS resources selected by the terminal device during uplink transmission. In non-codebook transmission, since one SRS resource can be used to indicate one transmission layer, when using non-codebook transmission, the network side can, as described above, perform uplink channel detection based on the SRS sent by the UE to select one or more SRS resources to indicate to the user through the SRI field. Among them, as described above, the first indication can be located in the SRI field.

[0158] For example, the number of bits occupied by the first indication may be expressed by the following formula (1):

[0159]

[0160] Among them, N SRS1 is the number of SRS resources in the first SRS resource set, L max is the preset number of transmission layers. That is, when the first indication indicates that the terminal device can use 1 transmission layer, there are N SRS possibilities; when the first indication indicates that the terminal device can use 2 transport layers, there is C N 2 possibilities; ...; until the terminal device is indicated in the first indication to use the maximum number of transmission layers (for example, the preset number of transmission layers L) max and the number of SRS resources N of the first SRS resource set SRS1 How many possibilities are there when ?

[0161] For example, if there are 4 SRS resources in an SRS resource set, there are 4 possibilities (C4 1 ), indicating that there are 6 possibilities for 2 transport layers (C4 2 ), indicating that there are 4 possibilities for 3 transport layers (C4 3 ), indicating that there is one possibility among 4 transport layers (C4 4 ).

[0162] If the current preset number of transmission layers (i.e., L max ) is 2, then there are a total of C4 1 +C4 2 =4+6 (10) possibilities. Thus, 4 bits (because 10 is less than or equal to 16 possibilities of 4 bits and greater than 8 possibilities of 3 bits) can be used to indicate the number of transmission layers and the first SRS resource in the first indication.

[0163] The above is just an example of determining the number of bits of the first indication. In fact, as described above, in addition to the embodiments and specific examples given above, there are many ways to determine the number of bits of the first indication. For example, it can also be determined based on the number of SRS resources in the first SRS resource set and the rule that the number of transmission layers indicated in the first indication is equal to the number of determined first SRS resources, which can save the number of bits occupied by the first indication. In the following example, such a specific example will be given.

[0164] In addition, regarding the number of bits of the second indication, when the second indication includes an indication of the number of transmission layers to be used by the second transmission, it can be determined in a manner similar to the various ways of determining the number of bits of the first indication, but when the second indication does not include an indication of the number of transmission layers to be used by the second transmission, it can be determined in a manner different from the various ways of determining the number of bits of the first indication. More specific explanations and descriptions will be provided below.

[0165] Optionally, the bit value of the first indication may be determined based on a first corresponding relationship, wherein the first corresponding relationship may be a corresponding relationship between SRS resources in the first SRS resource set and a first group of bit values.

[0166] Optionally, the bit value of the second indication may be determined based on a second corresponding relationship, wherein the second corresponding relationship may be a corresponding relationship between SRS resources in the second SRS resource set and a second group of bit values.

[0167] In this embodiment of the present application, a group of bit values ​​may be corresponded to the SRS resources in the first SRS resource set according to a first correspondence relationship. Thus, each time the network device determines the first indication, it may select a suitable bit value from the group of bit values ​​and transmit it to the terminal device as the current bit value of the first indication.

[0168] In addition, the above-mentioned first corresponding relationship can be stored on both the network device side and the terminal device side, so that the network device can easily make a selection, and the terminal device can easily refer to the first corresponding relationship to decode the first indication.

[0169] Optionally, the terminal device may determine the number of transmission layers and / or the first SRS resource indicated in the first indication based on the first corresponding relationship.

[0170] Optionally, the terminal device may determine the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second corresponding relationship.

[0171] For example, the terminal device can determine the number of the second SRS resources to be used by the terminal device based on the number of transmission layers indicated in the first indication (for example, it can be based on the specific relationship between the number of transmission layers indicated in the first indication and the number of second SRS resources); then, the terminal device can determine the second SRS resources to be used by the terminal device based on the second indication, for example, with reference to the second corresponding relationship.

[0172] In this embodiment of the present application, the number of second SRS resources to be used can be determined based on the number of transmission layers indicated in the first indication, and then the second SRS resources to be used by the terminal device can be determined based on the second indication. For example, the number of transmission layers can be equal to the number of first / second SRS resources. Of course, at this time, the number of second SRS resources is also equal to the number of first SRS resources. Therefore, there is no need to indicate the number of second SRS resources in the second indication, but only the specific SRS resources to be used need to be indicated (for example, by resource identification, numbering, other forms of indication codes, etc.). In this way, at least the number of bits of the second indication can be saved, and the coding rate and resource utilization can be improved.

[0173] As described above, the first corresponding relationship indicates how the first group of bit values ​​corresponds to each SRS resource, so that for the first transmission, the terminal device can determine the first SRS resource to be used, for example, which first SRS resource to use, through the bit value in the received first indication. In addition, it is possible to determine how many first SRS resources can be used for the first transmission through the explicit indication in the bit value of the first indication, or although it is not explicitly given in the first indication, the terminal device can calculate how many first SRS resources are available for use through the specific first SRS resource to be used. Here, the purpose of determining how many first SRS resources are to be used is to determine the number of transmission layers to be used, because one transmission layer number can correspond to one SRS resource. Therefore, after determining how many first SRS resources are to be used through the first indication, the number of transmission layers to be used can be determined, because the two are equal. More specific examples will be given later to make this embodiment of the present application clearer and easier to understand.

[0174] Therefore, there is no need to use a specific number of bits to separately indicate the number of transmission layers and / or the number of SRS resources to be used in the first indication. Instead, a joint indication method can be used, which greatly saves the number of bits of the first indication and improves resource utilization.

[0175] According to an embodiment of the present application, the bit value of the second indication may be determined based on a correspondence between SRS resources in the second SRS resource set and a second group of bit values ​​(a second correspondence).

[0176] In this embodiment of the present application, a correspondence (second correspondence) between another set of bit values ​​(i.e., a second set of bit values) and the SRS resources in the second SRS resource set may be defined to determine the bit value of the second indication. Similarly, the second correspondence may be stored on both the network device side and the terminal device side so that the network device can conveniently select and the terminal device can conveniently decode the second indication.

[0177] Optionally, according to an embodiment of the present application, for the second transmission, the terminal device may determine the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the second indication and the second corresponding relationship. This situation may be similar to the above description for the first transmission, and will not be repeated here.

[0178] Optionally, according to an embodiment of the present application, the terminal device may determine the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second corresponding relationship.

[0179] In this embodiment of the present application, since the second indication may not indicate the number of transmission layers and may only indicate the second SRS resource, it can be known that the second correspondence relationship may be different from the first correspondence relationship, which means that the second indication can save more bits, thereby improving the resource utilization of the technical solution of this embodiment of the present application.

[0180] Optionally, according to an embodiment of the present application, when the number of SRS resources in the first SRS resource set is 1, the number of bits of the first indication may be 1.

[0181] Similarly, when the number of SRS resources in the second SRS resource set is 1, the number of bits of the second indication may be 1.

[0182] In this embodiment of the present application, for the case where the number of SRS resources in a certain SRS resource set is 1, the corresponding number of bits of the indication can be set to 1. For example, the value of the bit can be set to "1" to indicate that the terminal device can use the only one SRS resource for the corresponding uplink transmission, and the number of transmission layers used is also 1. In fact, if the number of SRS resources in a certain SRS resource set is 1, the value of the corresponding 1 bit of the indication can also be set to "0" to indicate that the terminal device can use the only one SRS resource for the corresponding uplink transmission, and the number of transmission layers used is also 1, as long as both the network device and the terminal device know the meaning of the bit value.

[0183] It should be noted here that although the number of first SRS resources and the number of second SRS resources indicated in each first indication and second indication are the same (the same as the number of transmission layers indicated in the first indication), this does not mean that there is no need to determine the second indication, because in the case of uplink repeated transmission for multiple receiving ends and / or multiple beam directions, a second indication is still required to clarify which SRS resource(s) (i.e., second SRS resources) to be used by the terminal device for the uplink repeated transmission.

[0184] For the case where the number of SRS resources in the second SRS resource set is 1, if the second indication is not determined and sent, it may be considered as a transmission of a single receiving end and / or a single beam direction. Therefore, in order to make it clearer that it is a multi-beam transmission, the second indication can be made 1 bit to indicate "transmission of multiple receiving ends and / or multiple beam directions".

[0185] Similarly, for the case where the number of SRS resources in the first SRS resource set is 1, if the first indication is not determined and sent, it may be considered that the network side has no response to the uplink repeated transmission of the terminal device (neither the indication of the number of transmission layers nor the indication of the first SRS resource). Therefore, in order to clarify the response, the first indication can be made 1 bit.

[0186] Optionally, when the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the number of bits of the second indication can be determined based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

[0187] In the above embodiment, the number of bits of the first indication can be determined based on the number of transmission layers indicated in the first indication and the number of SRS resources in the first SRS resource set, while for the second indication, it is not necessary to indicate the number of transmission layers, because the number of transmission layers indicated in the first indication can also be applied to the transmission corresponding to the second indication. Therefore, the number of bits of the second indication can be determined based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

[0188] Optionally, the number of bits of the second indication is determined by a maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources in the second SRS resource set, wherein each of the different numbers of transmission layers does not exceed a preset number of transmission layers.

[0189] Considering that the second indication may not need to indicate the number of transmission layers, the determination of its number of bits can be simplified accordingly. Moreover, if the second indication uses a different number of bits each time, there is a certain burden on encoding on the network device side and decoding on the terminal device side. Therefore, in this embodiment of the present application, it can be considered to use a fixed length of bits for the second indication, so as to reduce the encoding and decoding burden on the network device side and the terminal device side, and reduce the bit error rate.

[0190] The fixed length bit number to be used can be determined by, for example, determining the respective bit numbers based on different numbers of transmission layers and the number of SRS resources in the second SRS resource set, and then selecting the largest number of bits therefrom as the fixed length bit number.

[0191] Optionally, according to an embodiment of the present application, the preset number of transmission layers, the number of SRS resources in the first SRS resource set, and the number of SRS resources in the second SRS resource set can be updated.

[0192] That is to say, these values ​​do not necessarily have to be always specific values, but can be updated according to actual conditions or needs. The timing of the update can be on-demand update, triggered update (for example, based on certain trigger conditions), or regular update. Thus, the solution of the present application can be made more flexible and convenient.

[0193] Optionally, the uplink repeated transmission performed by the terminal device is for multiple receiving ends and / or different beam directions, or, the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

[0194] Among them, the network device or the terminal device can determine whether the uplink repeated transmission of the terminal device is for multiple receiving ends and / or different beam directions or for a single receiving end and / or a single beam direction, and the present application does not impose any restrictions on this.

[0195] As described above, the present application not only supports uplink repeated transmission of multiple receiving ends and / or multiple beam directions, but also supports uplink repeated transmission of a single receiving end and / or a single beam direction, thereby making the present application highly compatible and its application very flexible and convenient.

[0196] Optionally, the SRS resource indication information includes a first indication and / or at least one second indication, specifically:

[0197] The SRS resource indication information includes a first indication, wherein the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

[0198] Optionally, according to an embodiment of the present application, in response to determining that the uplink repeated transmission of the terminal device uses a single receiving end and / or a single beam direction, only the first indication may be determined and sent without determining and sending the second indication.

[0199] In this embodiment of the present application, when it is determined that the uplink repeated transmission of the terminal device is for a single receiving end and / or a single beam direction, only the first indication can be determined and sent, without determining and sending the second indication, that is, the first indication determined and sent is the SRS resource indication information for the uplink repeated transmission. Thus, the compatibility of the present application for uplink repeated transmission of a single receiving end and / or a single beam direction is achieved, and since there is no need to determine and send the second indication, processing resources and the number of bits are saved accordingly, thereby improving resource utilization.

[0200] In addition, in the case where the uplink repeated transmission is directed to multiple receiving ends but a single beam direction, the SRS resource indication information may include a first indication and a second indication.

[0201] Alternatively, if Fig.10 As shown, according to an embodiment of the present application, the above transmission method may further include:

[0202] S220', in response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or a single beam direction.

[0203] That is, after receiving the SRS resource indication information, the terminal device decodes it. If the decoding result is only the first indication but no second indication, the terminal device confirms that it wants to perform uplink repeated transmission for a single receiving end and / or a single beam direction.

[0204] Optionally, as described above, the receiving end may include a transmitting receiving point TRP. In addition, the receiving end may also include a non-TRP receiving end.

[0205] The transmission method according to the present application is described above. Through the transmission method of the present application, when indicating the SRS resources to be used for the uplink PUSCH transmission of the terminal device, the PDCCH load can be occupied as little as possible, thereby improving the coding rate and resource utilization.

[0206] In order to make the present application easier to understand, a more specific description will be given below through some examples.

[0207] Example 1

[0208] Fig.11 FIG. 1 shows a flow chart of a transmission method according to an example of the present application. Fig.11 As shown, the transmission method of this example may include the following steps and / or operations.

[0209] Step S1001: For uplink repeated transmission of a terminal device, the network device configures non-codebook transmission for it, and configures a required resource set and sets the preset number of transmission layers for it.

[0210] In this example, the network device can configure two groups of SRS resource sets for the terminal device, and both of these two groups of SRS resource sets are used for non-codebook transmission. In addition, the first SRS resource set includes, for example, four SRS resources: SRS resources 0, 1, 2, and 3, and the second SRS resource set also includes, for example, four SRS resources: 4, 5, 6, and 7.

[0211] For example, the preset number of transmission layers is set to 4. This means that when the network device determines SRS resource indication information (for example, including the first indication and the second indication) for the uplink transmission of the terminal device, a maximum of 4 SRS resources are selected from each SRS resource set. Since the method for determining the preset number of transmission layers has been described above, it will not be repeated here.

[0212] Step S1002: The terminal device can measure the NZP CSI-RS signal associated with each SRS resource set separately to obtain a candidate uplink precoding matrix, and the terminal device can precode each SRS resource in the corresponding SRS resource set based on the candidate uplink precoding matrix and send it to a network device (such as a base station).

[0213] In step S1002, the terminal device sends the relevant signals of each SRS resource in the corresponding SRS resource set configured by the network device (i.e., SRS channel detection reference signal) to the network device, so that the network device (in step S1003) can detect these signals to select appropriate SRS resources for the terminal device to perform corresponding uplink transmission.

[0214] Step S1003: The network device performs uplink channel detection on the SRS sent by the terminal device, and determines a precoding matrix for uplink repeated transmission by the terminal device.

[0215] Here, the network device can select the same number of resources in each SRS resource set because, for example, for uplink repeated transmissions, the number of transmission layers for each transmission (such as the first transmission or the second transmission mentioned above) for each receiving end and / or each beam direction is the same, and one transmission layer corresponds to one SRS resource.

[0216] Step S1004: The network device determines SRS resource indication information including the first indication and the second indication, that is, determines the number of bits and the bit value of the first indication and the second indication, and sends it to the terminal device through the PDCCH.

[0217] Specifically, in this example, the number of transmission layers to be used by the terminal device for uplink repeated transmission may be determined as 1. Since the number of transmission layers is 1, one SRS resource may be selected from the first and second SRS resource sets as the first SRS resource and the second SRS resource, respectively.

[0218] Assume that based on the detection result in step S1003, in this example, SRS resource 0 is selected from the first SRS resource set as the only first SRS resource in the first indication.

[0219] At this time, the network device may determine the number of bits of the first indication in the manner described above. Here, a method of determining the number of bits of the first indication based on the preset number of transmission layers and the number of SRS resources in the first SRS resource set is selected.

[0220] Specifically, since the preset number of transmission layers is 4, it is necessary to determine the possibility of selecting 1 from the 4 SRS resources in the first SRS resource set, the possibility of selecting 2 from the 4 SRS resources in the first SRS resource set, the possibility of selecting 3 from the 4 SRS resources in the first SRS resource set, and the possibility of selecting 4 from the 4 SRS resources in the first SRS resource set, and add their numbers to determine the number of bits. That is, there are 4 possibilities of selecting 1 from the 4 SRS resources in the first SRS resource set, namely C4. 1=4; there are 6 possibilities for selecting 2 from the 4 SRS resources in the first SRS resource set, namely C4 2 =6, there are 4 possibilities to select 3 out of the 4 SRS resources in the first SRS resource set, namely C4 3 =4; there is one possibility of selecting 4 SRS resources from the 4 SRS resources in the first SRS resource set, namely C4 4 =1. Therefore, there are 4+6+4+1=15 possibilities, and therefore, the number of bits of the first indication may be 4. That is, the number of transmission layers (as mentioned above, the number of transmission layers to be used by the terminal device for uplink repeated transmission is 1 layer) and the first SRS resource to be used may be indicated by the 4 bits in the first indication, and therefore, the number of bits of the first indication may be 4. As to how to indicate the number of transmission layers and the first SRS resource to be used by the bits in the first indication (i.e., determining the bit value of the first indication), more specific examples will be given later for easier understanding.

[0221] In addition, in order to make the present application easier to understand, an example will be given to illustrate how to determine the number of bits of the first indication based on the preset number of transmission layers and the number of SRS resources in the first SRS resource set when the preset number of transmission layers is 2. Specifically, the possibility of selecting 1 from the 4 SRS resources in the first SRS resource set and the possibility of selecting 2 from the 4 SRS resources in the first SRS resource set can be determined respectively, and the number of bits can be determined by adding the two. That is, first determine that there are 4 possibilities of selecting 1 from the 4 SRS resources in the first SRS resource set, namely C4. 1 =4; there are 6 possibilities for selecting 2 from the 4 SRS resources in the first SRS resource set, namely C4 2 = 6. Therefore, there are 4+6=10 possibilities, and therefore, the number of bits of the first indication may be 4. The 4 bits in the first indication are used to indicate the number of transmission layers (the number of transmission layers to be used for uplink repeated transmission by the terminal device is 1 layer) and the first SRS resource to be used.

[0222] Since the first indication has given that the number of transmission layers to be used for this uplink repeated transmission is 1 layer (a specific example will be given later), the second indication only needs to indicate the second SRS resource to be used by the terminal device for the second transmission. Regarding the number of bits of the second indication, the number of bits of the second indication can also be determined in the manner described above. Here, the method of determining the number of bits of the second indication based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set is selected.

[0223] Specifically, there are four possibilities for selecting one of the four SRS resources in the second SRS resource set, namely, C4 1=4, so the number of bits of the second indication may be 2. The 2 bits in the second indication indicate the second SRS resource to be used (in this example, 1 second SRS resource because the number of transmission layers is 1). As to how to specifically indicate the second SRS resource to be used through the bit value in the second indication (i.e., determine the bit value of the second indication), a more specific example will be given later for easier understanding.

[0224] In addition, the above-mentioned SRS resource indication information (eg, SRI field) including the first indication and the second indication may be sent to the terminal device via the PDCCH.

[0225] Step S1005: The terminal device performs blind detection on the PDCCH sent by the network device, determines resource indication information such as the number of transmission layers and / or SRS resources indicated in the first indication and the second indication in the PDCCH, and performs repeated PUSCH transmission based on the determined resource indication information.

[0226] Specifically, the decoding of the bits in the first indication and the second indication by the terminal device corresponds to the meaning of the bit values ​​in the first indication and the second indication determined by the network device.

[0227] The following will first specifically illustrate how the network device (on the network side) determines the bit values ​​in the first indication and the second indication (step S1004).

[0228] In this example, the bit value in the first indication can be determined according to the correspondence between the SRS resources in the first SRS resource set and the first group of bit values ​​(first correspondence). Similarly, the bit value in the second indication can be determined according to the correspondence between the SRS resources in the second SRS resource set and the second group of bit values ​​(second correspondence). That is, the first indication and the second indication are encoded.

[0229] For ease of understanding, a more specific description will be given below in the form of a table. However, it should be noted that what is given here is only an example and should not be used as a limitation to the present application.

[0230] Assume that the network device is configured with two SRS resource sets: resource set 0 (first resource set) and resource set 1 (second resource set), both of which are used for non-codebook transmission, and assume that resource set 0 corresponds to the first beam (assuming that the first beam corresponds to the first TRP, such as TRP0), and resource set 1 corresponds to the second beam (assuming that the second beam corresponds to the second TRP, such as TRP1). And assume that the preset number of transmission layers is determined (or set) to be 4 layers in the manner described above.

[0231] Table 1 below gives detailed information about SRS resource set 0 and resource set 1. For example, SRS resource set 0 includes SRS resources 0, 1, 2, and 3, and SRS resource set 1 includes SRS resources 5, 8, 9, and 10.

[0232] Table 1

[0233] SRS Resource Set 0 SRS Resource Set 1 SRS Resource 0 SRS Resource 5 SRS Resource 1 SRS Resource 8 SRS Resource 2 SRS Resource 9 SRS Resource 3 SRS Resource 10

[0234] As described above, for the uplink transmission of the first beam (for the uplink transmission of TRP0), the number of bits to be occupied by the first indication can be determined based on the preset number of transmission layers 4 and the number of SRS resources 4 in the first SRS resource set. Specifically, there are four possibilities for selecting one from the four SRS resources in the first SRS resource set, namely, C4 1 =4; there are 6 possibilities for selecting 2 from the 4 SRS resources in the first SRS resource set, namely C4 2 =6, there are 4 possibilities to select 3 out of the 4 SRS resources in the first SRS resource set, namely C4 3 =4; there is one possibility of selecting 4 SRS resources from the 4 SRS resources in the first SRS resource set, namely C4 4 =1. Therefore, there are 4+6+4+1=15 possibilities, and therefore, the number of bits of the first indication can be 4. That is, the number of transmission layers and the first SRS resource to be used can be indicated by the 4 bits in the first indication. The following table will be used to describe how to indicate the number of transmission layers and the first SRS resource to be used by the bits in the first indication.

[0235] An example of a specific first corresponding relationship is given in the following Table 2. In Table 2, each bit value 0000, 0001, ..., 1110 in the first group of bit values ​​corresponds one-to-one to the first SRS resource indicated therein.

[0236] Table 2

[0237]

[0238] It can be seen from Table 2 that when the first indication is to indicate that the first SRS resource is 1, the bit value of the first indication can be one of 0000, 0001, 0010, and 0011; when the first indication is to indicate that the first SRS resources are 2, the bit value of the first indication can be one of 0100, 0101, 0110, 0111, 1000, and 1001; when the first indication is to indicate that the first SRS resources are 3, the bit value of the first indication is one of 1010, 1011, 1100, and 1101; when the first indication is to indicate that the first SRS resources are 4, the bit value of the first indication is 1110.

[0239] Assuming that the network device determines that the number of transmission layers for the uplink repeated transmission to be performed by the terminal device is 1, and determines through channel detection that SRS resource 1 of the 4 SRS resources in the first SRS resource set is the first SRS resource used for the first transmission by the terminal device, then it can be determined that the bit value of the first indication is 0001 (the number of transmission layers to be used by the terminal device is 1, and the first SRS resource only includes SRS resource 1).

[0240] Furthermore, the number of bits of the second indication may be determined based on the number of transmission layers to be used and the number of SRS resources in the second SRS resource set. Specifically, since it is previously determined that the number of transmission layers to be used is 1 and the number of SRS resources in SRS resource set 1 is 4, there are 4 possibilities for selecting 1 SRS resource from 4 SRS resources, namely C4. 1 =4, then the number of bits of the second indication is 2. It can be seen that although the second SRS resource set and the first SRS resource set both include 4 SRS resources, the number of bits of the second indication is greatly reduced compared with the number of bits of the first indication, thereby reducing the load of the PDCCH and improving the coding rate and resource utilization.

[0241] Regarding the second correspondence, since it was previously determined that the number of transmission layers to be used is 1, the second SRS resource to be used is also 1, and each 2-bit bit value in the second group of bit values ​​(i.e., each bit value with a bit number of 2) can similarly represent a single SRS resource in SRS resource set 1, thereby achieving a one-to-one correspondence between each bit value in the second group of bit values ​​and the second SRS resource indicated by it. In the second correspondence given in Table 3 below, only the correspondence between the bit value and the single SRS resource appears, and no combination of SRS resources appears. As shown in Table 3, the second group of bit values ​​00, 01, 10, 11 has a corresponding relationship with each single SRS resource in SRS resource set 1 (the indicated second SRS resource).

[0242] Table 3

[0243]

[0244] Assuming that the network device determines through channel detection that SRS resource 8 among the four SRS resources in the second SRS resource set is the second SRS resource used for the terminal device to perform the second transmission, it can be determined that the bit value of the second indication is 01 (the second SRS resource only includes SRS resource 8).

[0245] In this way, the bit values ​​of the first indication and the second indication can be determined.

[0246] As mentioned above, the present application is not limited to the above examples, but the bit values ​​in the first indication and the second indication may also be determined by other methods.

[0247] Example 2

[0248] The steps in this example are similar to those in Example 1, but the parameters and methods are slightly different, so the description will still be based on the steps in Example 1.

[0249] Step S1001: The network device configures the uplink transmission of the terminal device as non-codebook transmission, and configures 2 groups of SRS resource sets for the uplink repeated transmission of the terminal device. Among them, resource set 1 contains 4 SRS resources: SRS resource 0, SRS resource 1, SRS resource 2, SRS resource 3; different from Example 1, resource set 2 contains 2 SRS resources: SRS resource 5, SRS resource 8. And determine that the preset number of transmission layers is 3 layers, that is, when the network device instructs the terminal device to perform uplink repeated transmission, the maximum number of transmission layers to be used is 3 layers, and a maximum of 3 SRS resources are selected from each resource set for use.

[0250] Since step S1002 and step S1003 are similar to Example 1, they are not described again here.

[0251] Step S1004: The network device determines SRS resource indication information including the first indication and the second indication, that is, determines the number of bits and the bit value of the first indication and the second indication, and sends it to the terminal device through the PDCCH.

[0252] Here, assuming that the network device determines that the number of transmission layers to be used by the terminal device is 2 layers, and the network device determines based on the channel detection in step S1003 that SRS resource 0 and resource 2 are selected from SRS resource set 0 as the first resources, that is, the first resources include SRS resource 0 and SRS resource 2, then the network device can determine the number of bits of the first indication based on the determined number of transmission layers to be used (as the number of transmission layers indicated in the first indication) and the number of SRS resources in the first SRS resource set, which is different from Example 1.

[0253] Since there are 4 SRS resources in SRS resource set 0 and the number of transmission layers to be used is 2, there are 4 possibilities for selecting 1 SRS resource from SRS resource set 0 (C4 1 ), there are 6 possibilities for selecting 2 SRS resources from SRS resource set 0 (C4 2 ), then there are a total of C4 1 +C4 2=4+6 (10) possibilities. Thus, 4 bits (because 10 is less than or equal to 16 possibilities of 4 bits and greater than 8 possibilities of 3 bits) can be used to indicate the number of transmission layers and the first SRS resource in the first indication.

[0254] Table 4 below shows a first correspondence between a first group of bit values ​​and SRS resources in the first SRS resource set. Since the number of bits of the first indication is determined based on the determined number of transmission layers to be used, 2 (as the number of transmission layers indicated in the first indication) and the number of SRS resources in the first SRS resource set, 4, only 10 groups of corresponding values ​​(the correspondence between each single SRS resource and the combination of 2 SRS resources and the bit value) are shown in the table, and the correspondence between the combination of 3 SRS resources and the combination of 4 SRS resources and the bit value may not be shown.

[0255] Here, if the number of bits of the first indication is determined based on the preset number of transmission layers 3 and the number of SRS resources in the first SRS resource set 4, the number of bits of the determined first indication is also 4, but the first corresponding relationship at this time may also include the situation that the indicated first SRS resources include 3 SRS resources. In addition, if the preset number of transmission layers is set to 4 as in Example 1, when the number of bits of the first indication is determined based on the preset number of transmission layers 4 and the number of SRS resources in the first SRS resource set 4, the number of bits of the determined first indication is also 4, but the first corresponding relationship presented at this time may also include the situation that the indicated first SRS resources include 4 SRS resources, as shown in Table 2.

[0256] Table 4

[0257]

[0258] Since the network device determines that the number of transmission layers for uplink repeated transmission to be performed by the terminal device is 2, now assuming that it is determined through channel detection that SRS resource 0 and SRS resource 1 of the 4 SRS resources in the first SRS resource set are the first SRS resources used for the terminal device to perform the first transmission, it can be determined that the bit value of the first indication is 0100 (the number of transmission layers to be used by the terminal device is 2, and the first SRS resource includes SRS resource 0 and SRS resource 1).

[0259] Since it is determined that the number of transmission layers to be used is 2, the number of second SRS resources to be used is also 2. Therefore, the number of bits of the second indication can be determined based on the number of transmission layers to be used, 2, and the number of SRS resources in the second SRS resource set. For example, the possibility of selecting 2 SRS resources from 2 SRS resources in SRS resource set 1 is 1, and the number of bits of the second indication can be 1.

[0260] In the second corresponding relationship given in Table 5 below, the correspondence between the bit value and the combination of two SRS resources (the indicated second SRS resources) is presented. As shown in Table 5, the second group of bit values ​​1 (the second group of bit values ​​only includes one value) has a corresponding relationship with the two SRS resources 5 and 8 in the SRS resource set 1. In addition, although the bit value shown in Table 5 is 1, the bit value can also be 0, as long as the meaning represented by the bit value is clear to both the network device and the terminal device.

[0261] It can be seen that the number of bits of the second indication is greatly reduced compared to the number of bits of the first indication, thereby reducing the load of the PDCCH and improving the coding rate and resource utilization.

[0262] Table 5

[0263]

[0264] Since it is determined that the number of transmission layers to be used is 2, the number of second SRS resources to be used is also 2. Therefore, the network device can determine that the two SRS resources 5 and 8 of the second SRS resource set are all used as the second SRS resources for the second transmission of the terminal device, and then it can be determined that the bit value of the second indication is 1 (the second SRS resources include SRS resources 5 and 8).

[0265] In this way, the bit values ​​of the first indication and the second indication can be determined.

[0266] As mentioned above, since the number of transmission layers to be used is determined to be 2 in this example, the network device can only select 2 from the 2 SRS resources of SRS resource set 1 when determining the second SRS resource of the second indication, that is, there is 1 possibility. When there is only 1 possibility, the bit value may not be arranged for indication, that is, the second indication may not be determined and sent. However, considering that if the second indication is not determined and sent, the terminal device may misunderstand, such as thinking that the network device indicates that the PUSCH transmission is for a single receiving end and / or a single beam direction (for example, one indication corresponds to one beam direction or a receiving end such as TRP, and if there is no corresponding indication, it means that no transmission is required), or thinking that the network device indicates that the PUSCH transmission is for multiple beam directions or MTRP, but if there is no corresponding indication, it is considered that all SRS resources of the corresponding SRS resource set are used. Therefore, in order to avoid such misunderstandings, when there is only 1 possibility, a bit value may be arranged in the second indication for indication.

[0267] In addition, in order to save the number of bits of the first indication, the number of bits of the first indication can also be determined based on the number of SRS resources in the first SRS resource set and the rule that the number of transmission layers indicated in the first indication is equal to the number of determined first SRS resources. This is also different from Example 1.

[0268] For example, the first corresponding relationship in Table 2 may be changed to that shown in Table 6 below.

[0269] Table 6

[0270]

[0271] In Table 6, the number of first SRS resources represented is the number of transmission layers to be used. For example, 00, 01, 10, and 11 are used to represent a single first SRS resource (a single SRS resource selected from the first SRS resource set as the first SRS resource). In this case, the first indication only needs to be represented by 2 bits. When the number of first SRS resources is 2, 3 bits can be used to represent it. In both cases, the simplified method of determining the number of bits and bit values ​​of the first indication is generally similar to the method of determining the number of bits and bit values ​​of the second indication based on the number of transmission layers to be used and the number of SRS resources in the second SRS set. However, when the number of first SRS resources is 3, since the 2-bit bit value is already occupied by the case of a single first SRS resource, a 3-bit bit value is considered to be used to represent the case where the first SRS resource includes 3 SRS resources. When the number of first SRS resources is 4, since the 3-bit bit value can still be used, a 3-bit bit value can still be used to represent the case where the number of first SRS resources is 4. For convenience, a special 3-bit value may also be used to indicate the case where the number of first SRS resources is 4, such as 111.

[0272] It should be noted that the bit values ​​given in Table 6 are only exemplary and the present application should not be limited thereto.

[0273] By comparison, it can be found that the use of a simplified expression can save bits, especially when the number of transmission layers to be used (ie, the first SRS resource to be used) is small.

[0274] In addition, it is necessary to clarify that, for the first correspondence, when the first SRS resources are 3, since the 2-bit bit value is already occupied by the case of a single first SRS resource, a bit value of another number of bits is required to express the first SRS resource to be used and the number of transmission layers. However, for the second correspondence, 2 bits can be used to indicate the case where the second SRS resource set includes 4 SRS resources and the second SRS resources to be used are 3 (C4 3=4) (as shown in Table 7 below) and the second SRS resource set includes 4 SRS resources and the second SRS resource to be used is 1 (C4 1 =4) (as shown in Table 8 below), as long as the second SRS resources represented by the 2-bit bit values ​​are defined, because the number of transmission layers to be used can be determined based on the first indication, when the number of transmission layers is determined, the second SRS resource to be used can be determined through the second corresponding relationship corresponding to the number of transmission layers.

[0275] For example, assuming that the terminal device determines that the number of transmission layers to be used is 3 based on the first indication, it can then look up Table 7 to determine the second SRS resource indicated by the second indication; similarly, assuming that the terminal device determines that the number of transmission layers to be used is 1 based on the first indication, it can then look up Table 8 to determine the second SRS resource indicated by the second indication.

[0276] Table 7

[0277]

[0278] Table 8

[0279]

[0280] Step S1005 is similar to that in Example 1. The terminal device performs blind detection on the PDCCH sent by the network device, determines the resource indication information such as the number of transmission layers and / or SRS resources indicated in the first indication and the second indication in the PDCCH, and performs repeated transmission of PUSCH with multiple beams (two beams) based on the determined resource indication information. It will not be repeated here.

[0281] Example 3

[0282] The steps in this example are similar to those in Example 1, but the parameters and methods are slightly different. Therefore, the steps in Example 1 will still be described.

[0283] Step S1001: For uplink repeated transmission of a terminal device, the network device configures non-codebook transmission for it, and configures a required resource set and sets the preset number of transmission layers for it.

[0284] Specifically, in this example, the network device still configures 2 groups of SRS resource sets for the terminal device. Resource set 1 includes 4 SRS resources, and resource set 2 also includes 4 SRS resources. The preset number of transmission layers is determined to be 4, that is, the network device instructs the terminal device to select a maximum of 4 SRS resources from each resource set when performing uplink repeated transmission.

[0285] Since step S1002 and step S1003 are similar to Example 1, they are not described again here.

[0286] Step S1004: The network device determines SRS resource indication information including the first indication and the second indication, that is, determines the number of bits and the bit value of the first indication and the second indication, and sends it to the terminal device through the PDCCH.

[0287] The network device determines that the number of transmission layers to be used by the terminal device is 4 (equal to the preset number of transmission layers 4), then based on the SRS resource set 0, all SRS resources 0, 1, 2, 3 are selected as the first SRS resources. At this time, the network device can determine that the number of bits of the first indication is 4 according to formula 1 (the sum of various possibilities is C4 1 +C4 2 +C4 3 +C4 4 =15).

[0288] Therefore, according to, for example, Table 2 above, it can be determined that the bit value of the first indication is 1110.

[0289] The number of bits of the second indication can be determined based on the number of transmission layers to be used, 4, and the number of SRS resources in the second SRS resource set, 4 resource quantities are selected from the 4 resource quantities (assuming that they are SRS resources 5, 6, 7, and 8). There is only one possibility, so the number of bits of the second indication can be determined to be 1. In this case, the bit value of the second indication can be 0 or 1, as shown in Table 9 below.

[0290] Table 9

[0291]

[0292] Although it is described above that the number of bits of the second indication can be 0 or 1, thereby saving bits, considering that different numbers of bits in the second indication lead to different total numbers of bits of PDCCH, which will bring about the complexity of blind detection, a solution of using a fixed number of bits for the second indication can also be adopted.

[0293] For example, in the case where the second SRS resource set includes 4 SRS resources (assuming that they are SRS resources 5, 6, 7, and 8), there are 4 possibilities when selecting 1 SRS resource as the second SRS resource, 6 possibilities when selecting 2 SRS resources as the second SRS resources, 4 possibilities when selecting 3 SRS resources as the second SRS resources, and 1 possibility when selecting 4 SRS resources as the second SRS resources. The number of bits required for these cases is 2, 3, 2, and 0 (or 1 bit, as described above). Therefore, the largest number of bits, i.e., 3, can be selected as the number of bits of the second indication.

[0294] Furthermore, multiple different second correspondence tables may be defined for different situations, so as to determine the bit value of the second indication based on the corresponding tables. For example, Table 10 below shows a situation where 3 bits are used to indicate that the first SRS resource includes 1 SRS resource; Table 11 below shows a situation where 3 bits are used to indicate that the first SRS resource includes 2 SRS resources; Table 12 below shows a situation where 3 bits are used to indicate that the first SRS resource includes 3 SRS resources; Table 13 below shows a situation where 3 bits are used to indicate that the first SRS resource includes 4 SRS resources.

[0295] It should be noted that the tables shown in this article are only exemplary and should not be considered as limiting the present application. Moreover, many other tables can be designed based on the technical concept of the present application, and they are all within the protection scope of the present application.

[0296] Table 10

[0297]

[0298] Table 11

[0299]

[0300] Table 12

[0301]

[0302] Table 13

[0303]

[0304] Step S1005: The terminal device performs blind detection on the PDCCH sent by the network device, determines the resource indication information such as the number of transmission layers and / or SRS resources indicated in the first indication and the second indication in the PDCCH, and performs multi-beam PUSCH repeated transmission based on the determined resource indication information.

[0305] Example 4

[0306] The steps in this example are similar to those in Example 1, but the parameters and methods are slightly different. Therefore, the steps in Example 1 will still be described.

[0307] Step S1001: For uplink repeated transmission of a terminal device, the network device configures non-codebook transmission for it, and configures a required resource set and sets the preset number of transmission layers for it.

[0308] Specifically, in this example, the network device configures two groups of SRS resource sets for the terminal device. SRS resource set 0 includes 4 SRS resources, and SRS resource set 1 includes 3 SRS resources (assuming they are SRS resources 5, 8, and 9).

[0309] Assume that the supported transmission capability reported by the terminal device (also referred to as "the supported transmission layer number of the terminal device") is 4 layers. As mentioned above, the supported transmission capability reported by the terminal device can be the maximum number of MIMO layers or the maximum number of transmission layers that the terminal device can support, which will not be repeated here. However, since SRS resource set 1 only contains 3 SRS resources, the network device determines that the preset number of transmission layers is 3. That is, the preset number of transmission layers can be determined based on the first preset number of transmission layers L1 related to the supported number of transmission layers of the terminal device, and at least one of the number of resources of the first and second SRS resource sets.

[0310] In addition, by the way, as mentioned above, the preset number of transmission layers can be determined by at least one of the following: a first preset number of transmission layers L1, the first preset number of transmission layers L1 is related to the number of supportable transmission layers of the terminal device; a second preset number of transmission layers L2, the second preset number of transmission layers L2 is a specific number of transmission layers preset for multi-beam transmission; and a third preset number of transmission layers L3, the third preset number of transmission layers L3 is determined by at least one of the number of SRS resources of the first SRS resource set and the number of SRS resources of the second SRS resource set.

[0311] If it is the above situation, but the specific number of transmission layers preset for multi-beam transmission, that is, the second preset number of transmission layers L2, is 2, then at this time, if the preset number of transmission layers is determined based on the first preset number of transmission layers L1, the second preset number of transmission layers L2 and the third preset number of transmission layers L3, then the preset number of transmission layers can be determined as the minimum value 2 among the three.

[0312] It should be noted that the above are several examples of determining the preset number of transmission layers, and not all situations are listed. Moreover, as long as all situations for determining the preset number of transmission layers are consistent with the description of this application, they should be within the protection scope of this application.

[0313] Since step S1002 and step S1003 are similar to Example 1, they are not described again here.

[0314] Step S1004: The network device determines SRS resource indication information including the first indication and the second indication, that is, determines the number of bits and the bit value of the first indication and the second indication, and sends it to the terminal device through the PDCCH.

[0315] The network device determines that the number of transmission layers to be used by the terminal device is 3 (equal to the determined preset number of transmission layers), and based on the channel detection situation, selects SRS resources 0, 1, and 3 in SRS resource set 1 as the first SRS resource. At this time, the network device can determine that the number of bits of the first indication is 4 according to formula 1 (the sum of various possibilities is C4 1 +C4 2 +C4 3 =14).

[0316] Therefore, according to, for example, Table 2 above, it can be determined that the bit value of the first indication is 1011.

[0317] The number of bits of the second indication can be determined based on the number of transmission layers to be used, 3, and the number of SRS resources in the second SRS resource set, 3. There is only one possibility for selecting 3 SRS resources from 3 SRS resources (i.e., all SRS resources 5, 8, and 9 in the second SRS resource set), so the number of bits of the second indication can be determined to be 1. Moreover, according to the following Table 14, the bit value of the second indication can be determined to be 1 (or 0, which depends on the definition of the bit value in the corresponding correspondence table).

[0318] Table 14

[0319]

[0320] In addition, as described in Example 3, considering that different numbers of bits in the second indication lead to different total numbers of bits of the PDCCH, which will bring about the complexity of blind detection, a solution of using a fixed number of bits for the second indication can also be adopted. As described above, the maximum number of bits 3 can be used as the number of bits of the second indication. Then, the corresponding bit value can be determined based on the corresponding second corresponding relationship table, which will not be repeated here.

[0321] Step S1005: The terminal device performs blind detection on the PDCCH sent by the network device, determines the resource indication information such as the number of transmission layers and / or SRS resources indicated in the first indication and the second indication in the PDCCH, and performs multi-beam PUSCH repeated transmission based on the determined resource indication information.

[0322] The transmission method according to the embodiment of the present application and its several variations are described in detail above through several examples.

[0323] Fig.12 A transmission method according to another embodiment of the present application is shown, which may include the following steps.

[0324] S310, the network device determines channel sounding reference signal SRS resource indication information, and the SRS resource indication information is used to indicate the SRS resources used by the terminal device for uplink repeated transmission.

[0325] The SRS resource indication information may include a first indication and / or at least one second indication, wherein the first indication may indicate the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication may indicate the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the receiving end and / or beam direction targeted by the first transmission may be different from the receiving end and / or beam direction targeted by the second transmission.

[0326] The second indication may or may not include an indication of the number of transmission layers to be used by the terminal device for the second transmission.

[0327] Optionally, when the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication.

[0328] Optionally, the terminal device performs the first transmission in a non-codebook manner based on the received SRS resource indication information, using the number of transmission layers and the first SRS resource indicated in the first indication; and / or

[0329] Optionally, the terminal device performs the second transmission in a non-codebook manner based on the received SRS resource indication information, using the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication.

[0330] Optionally, the network device determines the channel sounding reference signal SRS resource indication information including:

[0331] The network device selects the first SRS resource to be indicated in the first indication and the second SRS resource to be indicated in the second indication respectively from a first SRS resource set and a second SRS resource set configured for the terminal device.

[0332] Optionally, the first SRS resource includes one or more SRS resources, and / or the second SRS resource includes one or more SRS resources.

[0333] Optionally, the number of SRS resources in the first SRS resource set is the same as or different from the number of SRS resources in the second SRS resource set.

[0334] Optionally, the number of transmission layers indicated in the first indication does not exceed a preset number of transmission layers.

[0335] Optionally, the preset number of transmission layers is determined by at least one of the following:

[0336] A first preset number of transmission layers L1, wherein the first preset number of transmission layers L1 is related to the number of transmission layers supported by the terminal device;

[0337] a second preset number of transmission layers L2, where the second preset number of transmission layers L2 is a number of transmission layers set for the uplink repeated transmission; and

[0338] A third preset number of transmission layers L3, wherein the third preset number of transmission layers L3 is determined by at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set.

[0339] Optionally, the first preset number of transmission layers L1 is determined by the terminal device and then sent to the network device, or the first preset number of transmission layers L1 is determined by the network device; and

[0340] Among them, when the terminal device supports the maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

[0341] Optionally, the preset number of transmission layers is the smaller one of the first preset number of transmission layers L1 and the second preset number of transmission layers L2.

[0342] Optionally, the preset number of transmission layers is the minimum of the following items:

[0343] The first preset number of transmission layers L1;

[0344] The second preset number of transmission layers L2; ​​and

[0345] The third preset number of transmission layers is L3.

[0346] Optionally, the network device determines the channel sounding reference signal SRS resource indication information including:

[0347] By performing uplink channel detection on the SRS sent by the terminal device, the network device determines the number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication.

[0348] Optionally, the first indication and the second indication are included in the same or different physical downlink control channels PDCCH.

[0349] Optionally, the first indication and the second indication are respectively included in different SRS resource indication SRI fields in the same PDCCH, or the first indication and the second indication are included in the same SRI field in the same PDCCH.

[0350] Optionally, the network device determines the number of bits of the first indication based on the following items:

[0351] a preset number of transmission layers or a number of transmission layers to be used for the first transmission; and

[0352] at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set; and / or

[0353] The network device determines the number of bits of the second indication based on:

[0354] a preset number of transmission layers or a number of transmission layers to be used for the second transmission; and

[0355] The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

[0356] Optionally, the uplink repeated transmission performed by the terminal device is for multiple receiving ends and / or different beam directions, or, the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

[0357] Optionally, the SRS resource indication information includes a first indication and / or at least one second indication, specifically:

[0358] The SRS resource indication information includes a first indication, wherein the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

[0359] Optionally, in response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or beam direction.

[0360] Optionally, the network device determines the channel sounding reference signal SRS resource indication information including:

[0361] The network device determines the bit value of the first indication based on a first corresponding relationship, wherein the first corresponding relationship is a corresponding relationship between the SRS resources in the first SRS resource set and a first group of bit values; and / or

[0362] The network device determines the bit value of the second indication based on a second corresponding relationship, wherein the second corresponding relationship is a corresponding relationship between the SRS resources in the second SRS resource set and a second group of bit values.

[0363] Optionally, the terminal device determines the number of transmission layers indicated in the first indication and / or the first SRS resource based on the first corresponding relationship; and / or

[0364] The terminal device determines the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second correspondence, or the terminal device determines the number of transmission layers and / or the second SRS resource indicated in the second indication based on the second correspondence.

[0365] Optionally, when the number of SRS resources in the first SRS resource set is 1, the number of bits of the first indication is 1; and / or when the number of SRS resources in the second SRS resource set is 1, the number of bits of the second indication is 1.

[0366] Optionally, when the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the network device determines the number of bits of the second indication based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

[0367] Optionally, the network device determines the maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources in the second SRS resource set as the number of bits of the second indication, wherein each of the different numbers of transmission layers does not exceed a preset number of transmission layers.

[0368] Optionally, the receiving end includes a transmitting receiving point TRP.

[0369] Optionally, the terminal device may determine the number of the second SRS resources to be used by the terminal device based on the number of transmission layers indicated in the first indication; and the terminal device may determine the second SRS resources to be used by the terminal device based on the second indication.

[0370] In this embodiment of the present application, the number of second SRS resources to be used can be determined based on the number of transmission layers indicated in the first indication, and then the second SRS resources to be used by the terminal device can be determined based on the second indication. For example, the number of transmission layers can be equal to the number of first / second SRS resources. Of course, at this time, the number of second SRS resources is also equal to the number of first SRS resources. Therefore, there is no need to indicate the number of second SRS resources in the second indication, but only the specific SRS resources to be used need to be indicated. In this way, at least the number of bits of the second indication can be saved, and the coding rate and resource utilization can be improved.

[0371] Fig.13 A schematic block diagram of a terminal device according to an embodiment of the present application is shown.

[0372] like Fig.13 As shown, the terminal device 400 according to the embodiment of the present application may include, for example:

[0373] The transceiver 410 may be configured to receive channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate an SRS resource used by the terminal device for uplink repeated transmission, where the SRS resource indication information includes a first indication and / or at least one second indication; and

[0374] The processor 420 can be configured to parse the first indication from the received SRS resource indication information to indicate the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and to parse the second indication to indicate the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission.

[0375] The processor 420 may include an encoder, a decoder, and the like.

[0376] The second indication may or may not include an indication of the number of transmission layers to be used by the terminal device for the second transmission.

[0377] Optionally, when the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication.

[0378] Optionally, based on the received SRS resource indication information, the terminal device uses the number of transmission layers and the first SRS resource indicated in the first indication to perform the first transmission in a non-codebook manner; and / or

[0379] Based on the received SRS resource indication information, the terminal device uses the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication to perform the second transmission in a non-codebook manner.

[0380] Optionally, the first preset number of transmission layers L1 is determined by the processor of the terminal device and then sent to the network device, or the first preset number of transmission layers L1 is determined by the network device. Wherein, when the terminal device supports the maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

[0381] Optionally, the number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication are determined by the network device through uplink channel detection of the SRS sent by the terminal device.

[0382] Optionally, in response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or beam direction.

[0383] Optionally, the processor determines the number of transmission layers and / or the first SRS resource indicated in the first indication based on the first corresponding relationship; and / or

[0384] The processor determines the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second correspondence, or the processor determines the number of transmission layers and / or the second SRS resource indicated in the second indication based on the second correspondence.

[0385] It should be understood that the operations and / or functions of various devices, units, modules, etc. (such as the above-mentioned transceiver 410 and processor 420, etc.) in the terminal device according to the embodiment of the present application are respectively for realizing the corresponding operations and / or functions performed by the terminal device in the above-mentioned transmission method. Therefore, for the sake of brevity, they will not be repeated here.

[0386] Fig.14 A schematic block diagram of a network device according to an embodiment of the present application is shown.

[0387] like Fig.14 As shown, the network device 500 according to the embodiment of the present application may include, for example:

[0388] The processor 510 may be configured to determine channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate an SRS resource to be used by a terminal device for uplink repeated transmission, where the SRS resource indication information includes a first indication and / or at least one second indication; and

[0389] The transceiver 520 may be configured to send the determined SRS resource indication information to the terminal device.

[0390] Among them, the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the receiving end and / or beam direction targeted by the first transmission is different from the receiving end and / or beam direction targeted by the second transmission.

[0391] Optionally, the processor 510 may respectively select the first SRS resource to be indicated in the first indication and the second SRS resource to be indicated in the second indication from a first SRS resource set and a second SRS resource set configured for the terminal device.

[0392] Optionally, the processor 510 may determine the number of bits of the first indication based on the following items:

[0393] a preset number of transmission layers or a number of transmission layers to be used for the first transmission determined from the first indication; and

[0394] At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set, and / or

[0395] The processor 510 may determine the number of bits of the second indication based on:

[0396] a preset number of transmission layers or a number of transmission layers to be used for the second transmission determined from the second indication; and

[0397] At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set

[0398] Optionally, the processor 510 may determine the number of bits of the first indication based on the following items:

[0399] a preset number of transmission layers or a number of transmission layers to be used for the first transmission determined from the first indication; and

[0400] At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set, and / or

[0401] The processor 510 may determine the number of bits of the second indication based on:

[0402] a preset number of transmission layers or a number of transmission layers to be used for the second transmission determined from the second indication; and

[0403] The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

[0404] Optionally, when the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the number of bits of the second indication can be determined by the processor 510 based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

[0405] Optionally, the processor 510 may determine the maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources of the second SRS resource set as the number of bits indicated by the second indication, each of the different numbers of transmission layers not exceeding a preset number of transmission layers.

[0406] It should be understood that the operations and / or functions of various devices, units, modules, etc. (such as the above-mentioned transceiver 520 and processor 510, etc.) in the network device according to the embodiment of the present application are respectively for realizing the corresponding operations and / or functions performed by the network device in the above-mentioned transmission method. Therefore, for the sake of brevity, they will not be repeated here.

[0407] Fig.15 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. Fig.15 The illustrated communication device 600 may include a processor 610 and a memory 620 .

[0408] The processor 610 may call and run a computer program from the memory 620 to implement the transmission method in the embodiment of the present application.

[0409] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0410] Alternatively, if Fig.15 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.

[0411] 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.

[0412] Optionally, the communication device 600 may 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 transmission method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0413] Optionally, the communication device 600 may 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 transmission method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0414] Fig.16 is a schematic structural diagram of a chip 700 according to an embodiment of the present application. Fig.16 The chip 700 shown may include a processor 710 and a memory 720. The processor 710 may call and run a computer program from the memory to implement the method in the embodiment 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.

[0415] Optionally, the chip 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.

[0416] Optionally, the chip 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.

[0417] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each transmission method in the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0418] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each transmission method in the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0419] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0420] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or other programmable logic devices, transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0421] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM).

[0422] 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.

[0423] Fig.17 8 is a schematic block diagram of a communication system 800 according to an embodiment of the present application. Fig.17 As shown, the communication system 800 may include a terminal device 810 and a network device 820 .

[0424] The terminal device 810 may be used to implement the corresponding functions implemented by the terminal device in the above transmission method, or may be the above terminal device 400 or the communication device 600 as the terminal device. The network device 820 may be used to implement the corresponding functions implemented by the network device in the above transmission method, or may be the above network device 500 or the communication device 600 as the terminal device. For the sake of brevity, it will not be described in detail here.

[0425] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0426] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0427] 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.

[0428] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present 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 transmission method, comprising: The terminal device receives channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate the SRS resource to be used by the terminal device for uplink repeated transmission. The SRS resource indication information includes a first indication and at least one second indication, wherein the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, and The receiving end and / or beam direction targeted by the first transmission is different from the receiving end and / or beam direction targeted by the second transmission; Wherein, in a case where the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication; The first indication and the second indication are included in the same physical downlink control channel PDCCH, and the first indication and the second indication are respectively included in different SRS resource indication SRI fields in the same PDCCH.

2. The transmission method according to claim 1, further comprising: Based on the received SRS resource indication information, the terminal device uses the number of transmission layers and the first SRS resource indicated in the first indication to perform the first transmission in a non-codebook manner; and / or Based on the received SRS resource indication information, the terminal device uses the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication to perform the second transmission in a non-codebook manner.

3. The transmission method according to claim 1, wherein: The first SRS resource and the second SRS resource are respectively selected from a first SRS resource set and a second SRS resource set configured for the terminal device.

4. The transmission method according to claim 1, wherein: The first SRS resource includes one or more SRS resources, and / or The second SRS resource includes one or more SRS resources.

5. The transmission method according to claim 3, wherein: The number of SRS resources in the first SRS resource set is the same as or different from the number of SRS resources in the second SRS resource set.

6. The transmission method according to any one of claims 1 to 5, wherein: The number of transmission layers indicated in the first indication does not exceed the preset number of transmission layers.

7. The transmission method according to claim 6, wherein: The preset number of transmission layers is determined by at least one of the following: A first preset number of transmission layers L1, wherein the first preset number of transmission layers L1 is related to the number of transmission layers that can be supported by the terminal device; a second preset number of transmission layers L2, where the second preset number of transmission layers L2 is a number of transmission layers set for the uplink repeated transmission; as well as A third preset number of transmission layers L3, wherein the third preset number of transmission layers L3 is determined by at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set.

8. The transmission method according to claim 7, in, The first preset number of transmission layers L1 is determined by the terminal device and then sent to the network device, or the first preset number of transmission layers L1 is determined by the network device; and Among them, when the terminal device supports the maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

9. The transmission method according to claim 7, wherein: The preset number of transmission layers is the smaller one between the first preset number of transmission layers L1 and the second preset number of transmission layers L2.

10. The transmission method according to claim 7, wherein: The preset number of transmission layers is the minimum of the following items: The first preset number of transmission layers L1; The second preset number of transmission layers L2; ​​and The third preset number of transmission layers is L3.

11. The transmission method according to any one of claims 1 to 5, wherein: The number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication are determined by performing uplink channel detection on the SRS sent by the terminal device.

12. The transmission method according to any one of claims 1 to 5, wherein: The number of bits of the first indication is determined based on: a preset number of transmission layers or a number of transmission layers to be used for said first transmission, and At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set, and / or The number of bits of the second indication is determined based on: a preset number of transmission layers or a number of transmission layers to be used for said second transmission, and The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

13. The transmission method according to any one of claims 1 to 5, wherein: The uplink repeated transmission performed by the terminal device is for multiple receiving ends and / or different beam directions, or the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

14. The transmission method according to any one of claims 1 to 5, wherein: The SRS resource indication information includes a first indication and / or at least one second indication, specifically: The SRS resource indication information includes a first indication, wherein the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

15. The transmission method according to any one of claims 1 to 5, further comprising: In response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or a single beam direction.

16. The transmission method according to any one of claims 1 to 5, wherein: The bit value of the first indication is determined based on a first corresponding relationship, wherein the first corresponding relationship is a corresponding relationship between an SRS resource in a first SRS resource set and a first group of bit values; and / or The bit value of the second indication is determined based on a second corresponding relationship, wherein the second corresponding relationship is a corresponding relationship between the SRS resources in the second SRS resource set and the second group of bit values.

17. The transmission method according to claim 16, further comprising: The terminal device determines the number of transmission layers and / or the first SRS resource indicated in the first indication based on the first corresponding relationship; and / or The terminal device determines the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second correspondence, or the terminal device determines the number of transmission layers and / or the second SRS resource indicated in the second indication based on the second correspondence.

18. The transmission method according to any one of claims 1 to 5, wherein: When the number of SRS resources in the first SRS resource set is 1, the number of bits of the first indication is 1; and / or When the number of SRS resources in the second SRS resource set is 1, the number of bits of the second indication is 1.

19. The transmission method according to any one of claims 1 to 5, wherein: When the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the number of bits of the second indication is determined based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

20. The transmission method according to any one of claims 1 to 5, wherein: The number of bits of the second indication is determined by a maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources in the second SRS resource set, and each of the different numbers of transmission layers does not exceed a preset number of transmission layers.

21. The transmission method according to any one of claims 1 to 5, wherein: The receiving end includes a transmitting receiving point TRP.

22. A transmission method, comprising: The network device determines channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate the SRS resource used by the terminal device for uplink repeated transmission. The SRS resource indication information includes a first indication and at least one second indication, wherein the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, and The receiving end and / or beam direction targeted by the first transmission is different from the receiving end and / or beam direction targeted by the second transmission; Wherein, in a case where the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication; The first indication and the second indication are included in the same physical downlink control channel PDCCH, and the first indication and the second indication are respectively included in different SRS resource indication SRI fields in the same PDCCH.

23. The transmission method according to claim 22, wherein: The terminal device performs the first transmission in a non-codebook manner based on the received SRS resource indication information, using the number of transmission layers and the first SRS resource indicated in the first indication; and / or The terminal device performs the second transmission in a non-codebook manner based on the received SRS resource indication information, using the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication.

24. The transmission method according to claim 22, wherein: The network device determines the channel sounding reference signal SRS resource indication information including: The network device selects the first SRS resource to be indicated in the first indication and the second SRS resource to be indicated in the second indication respectively from a first SRS resource set and a second SRS resource set configured for the terminal device.

25. The transmission method according to claim 22, wherein: The first SRS resource includes one or more SRS resources, and / or The second SRS resource includes one or more SRS resources.

26. The transmission method according to claim 24, wherein: The number of SRS resources in the first SRS resource set is the same as or different from the number of SRS resources in the second SRS resource set.

27. The transmission method according to any one of claims 22 to 26, wherein: The number of transmission layers indicated in the first indication does not exceed the preset number of transmission layers.

28. The transmission method according to claim 27, wherein: The preset number of transmission layers is determined by at least one of the following: A first preset number of transmission layers L1, wherein the first preset number of transmission layers L1 is related to the number of transmission layers that can be supported by the terminal device; a second preset number of transmission layers L2, where the second preset number of transmission layers L2 is a number of transmission layers set for the uplink repeated transmission; as well as A third preset number of transmission layers L3, wherein the third preset number of transmission layers L3 is determined by at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set.

29. The transmission method according to claim 28, in, The first preset number of transmission layers L1 is determined by the terminal device and then sent to the network device, or the first preset number of transmission layers L1 is determined by the network device; and Among them, when the terminal device supports the maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

30. The transmission method according to claim 28, wherein: The preset number of transmission layers is the smaller one between the first preset number of transmission layers L1 and the second preset number of transmission layers L2.

31. The transmission method according to claim 28, wherein: The preset number of transmission layers is the minimum of the following items: The first preset number of transmission layers L1; The second preset number of transmission layers L2; ​​and The third preset number of transmission layers is L3.

32. The transmission method according to any one of claims 22 to 26, wherein: The network device determines the channel sounding reference signal SRS resource indication information including: By performing uplink channel detection on the SRS sent by the terminal device, the network device determines the number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication.

33. The transmission method according to any one of claims 22 to 26, wherein: The network device determines the number of bits of the first indication based on: a preset number of transmission layers or a number of transmission layers to be used for the first transmission; as well as at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set; and / or The network device determines the number of bits of the second indication based on: a preset number of transmission layers or a number of transmission layers to be used for the second transmission; as well as The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

34. The transmission method according to any one of claims 22 to 26, wherein: The uplink repeated transmission performed by the terminal device is for multiple receiving ends and / or different beam directions, or the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

35. The transmission method according to any one of claims 22 to 26, wherein: The SRS resource indication information includes a first indication and / or at least one second indication, specifically: The SRS resource indication information includes a first indication, wherein the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

36. The transmission method according to any one of claims 22 to 26, wherein: In response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or beam direction.

37. The transmission method according to any one of claims 22 to 26, wherein: The network device determines the channel sounding reference signal SRS resource indication information including: The network device determines the bit value of the first indication based on a first corresponding relationship, wherein the first corresponding relationship is a corresponding relationship between an SRS resource in a first SRS resource set and a first group of bit values; and / or The network device determines the bit value of the second indication based on a second corresponding relationship, wherein the second corresponding relationship is a corresponding relationship between SRS resources in a second SRS resource set and a second group of bit values.

38. The transmission method according to claim 37, wherein: The terminal device determines the number of transmission layers indicated in the first indication and / or the first SRS resource based on the first corresponding relationship; and / or The terminal device determines the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second correspondence, or the terminal device determines the number of transmission layers and / or the second SRS resource indicated in the second indication based on the second correspondence.

39. The transmission method according to any one of claims 22 to 26, wherein: When the number of SRS resources in the first SRS resource set is 1, the number of bits of the first indication is 1; and / or When the number of SRS resources in the second SRS resource set is 1, the number of bits of the second indication is 1.

40. The transmission method according to any one of claims 22 to 26, wherein: When the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the network device determines the number of bits of the second indication based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

41. The transmission method according to any one of claims 22 to 26, wherein: The network device determines the maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources in the second SRS resource set as the number of bits of the second indication, wherein each of the different numbers of transmission layers does not exceed a preset number of transmission layers.

42. The transmission method according to any one of claims 22 to 26, wherein: The receiving end includes a transmitting receiving point TRP.

43. A terminal device, comprising: A transceiver configured to receive channel sounding reference signal SRS resource indication information, wherein the SRS resource indication information is used to indicate an SRS resource to be used by the terminal device for uplink repeated transmission, and the SRS resource indication information includes a first indication and at least one second indication; as well as a processor configured to parse, from the received SRS resource indication information, the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission indicated in the first indication, and parse the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission indicated in the second indication, wherein the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission; Wherein, in a case where the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication; The first indication and the second indication are included in the same physical downlink control channel PDCCH, and the first indication and the second indication are respectively included in different SRS resource indication SRI fields in the same PDCCH.

44. The terminal device according to claim 43, wherein: Based on the received SRS resource indication information, the terminal device uses the number of transmission layers and the first SRS resource indicated in the first indication to perform the first transmission in a non-codebook manner; and / or Based on the received SRS resource indication information, the terminal device uses the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication to perform the second transmission in a non-codebook manner.

45. The terminal device according to claim 43, wherein: The first SRS resource and the second SRS resource are respectively selected from a first SRS resource set and a second SRS resource set configured for the terminal device.

46. ​​The terminal device according to claim 43, wherein: The first SRS resource includes one or more SRS resources, and / or The second SRS resource includes one or more SRS resources.

47. The terminal device according to claim 45, wherein: The number of SRS resources in the first SRS resource set is the same as or different from the number of SRS resources in the second SRS resource set.

48. The terminal device according to any one of claims 43 to 47, wherein: The number of transmission layers indicated in the first indication does not exceed the preset number of transmission layers.

49. The terminal device according to claim 48, wherein: The preset number of transmission layers is determined by at least one of the following: A first preset number of transmission layers L1, wherein the first preset number of transmission layers L1 is related to the number of transmission layers that can be supported by the terminal device; a second preset number of transmission layers L2, where the second preset number of transmission layers L2 is a number of transmission layers set for the uplink repeated transmission; as well as A third preset number of transmission layers L3, wherein the third preset number of transmission layers L3 is determined by at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set.

50. The terminal device according to claim 49, in, The first preset number of transmission layers L1 is determined by the processor of the terminal device and then sent to the network device, or the first preset number of transmission layers L1 is determined by the network device; and Among them, when the terminal device supports the maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

51. The terminal device according to claim 49, wherein: The preset number of transmission layers is the smaller one between the first preset number of transmission layers L1 and the second preset number of transmission layers L2.

52. The terminal device according to claim 49, wherein: The preset number of transmission layers is the minimum of the following items: The first preset number of transmission layers L1; The second preset number of transmission layers L2; ​​and The third preset number of transmission layers is L3.

53. The terminal device according to any one of claims 43 to 47, wherein: The number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication are determined by performing uplink channel detection on the SRS sent by the terminal device.

54. The terminal device according to any one of claims 43 to 47, wherein: The number of bits of the first indication is determined based on: a preset number of transmission layers or a number of transmission layers to be used for the first transmission determined from the first indication, and At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set, and / or The number of bits of the second indication is determined based on: a preset number of transmission layers or a number of transmission layers to be used for the second transmission determined from the second indication, and The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

55. The terminal device according to any one of claims 43 to 47, wherein: The uplink repeated transmission performed by the terminal device is for multiple receiving ends and / or different beam directions, or the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

56. The terminal device according to any one of claims 43 to 47, wherein: The SRS resource indication information includes a first indication and / or at least one second indication, specifically: The SRS resource indication information includes a first indication, wherein the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

57. The terminal device according to any one of claims 43 to 47, wherein: In response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or beam direction.

58. The terminal device according to any one of claims 43 to 47, wherein: The bit value of the first indication is determined based on a first corresponding relationship, wherein the first corresponding relationship is a corresponding relationship between an SRS resource in a first SRS resource set and a first group of bit values; and / or The bit value of the second indication is determined based on a second corresponding relationship, wherein the second corresponding relationship is a corresponding relationship between the SRS resources in the second SRS resource set and the second group of bit values.

59. The terminal device according to claim 58, wherein: The processor determines, based on the first corresponding relationship, the number of transmission layers and / or the first SRS resource indicated in the first indication; and / or The processor determines the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second correspondence, or the processor determines the number of transmission layers and / or the second SRS resource indicated in the second indication based on the second correspondence.

60. The terminal device according to any one of claims 43 to 47, wherein: When the number of SRS resources in the first SRS resource set is 1, the number of bits of the first indication is 1; and / or When the number of SRS resources in the second SRS resource set is 1, the number of bits of the second indication is 1.

61. The terminal device according to any one of claims 43 to 47, wherein: When the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the number of bits of the second indication is determined based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

62. The terminal device according to any one of claims 43 to 47, wherein: The number of bits of the second indication is determined by a maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources in the second SRS resource set, and each of the different numbers of transmission layers does not exceed a preset number of transmission layers.

63. The terminal device according to any one of claims 43 to 47, wherein: The receiving end targeted by the first transmission and the receiving end targeted by the second transmission include a transmitting receiving point TRP.

64. A network device comprising: a processor configured to determine channel sounding reference signal SRS resource indication information, where the SRS resource indication information is used to indicate an SRS resource to be used by a terminal device for uplink repeated transmission, where the SRS resource indication information includes a first indication and at least one second indication; and a transceiver configured to send the determined SRS resource indication information to the terminal device, Wherein, the first indication indicates the number of transmission layers and the first SRS resource to be used by the terminal device for the first transmission in the uplink repeated transmission, and the second indication indicates the second SRS resource to be used by the terminal device for the second transmission in the uplink repeated transmission, wherein the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, wherein the receiving end and / or the beam direction targeted by the first transmission is different from the receiving end and / or the beam direction targeted by the second transmission; Wherein, in a case where the second indication does not include an indication of the number of transmission layers to be used by the terminal device for the second transmission, the number of transmission layers to be used by the terminal device for the second transmission is determined based on the number of transmission layers indicated in the first indication; The first indication and the second indication are included in the same physical downlink control channel PDCCH, and the first indication and the second indication are respectively included in different SRS resource indication SRI fields in the same PDCCH.

65. The network device according to claim 64, wherein: The terminal device performs the first transmission in a non-codebook manner based on the received SRS resource indication information, using the number of transmission layers and the first SRS resource indicated in the first indication; and / or The terminal device performs the second transmission in a non-codebook manner based on the received SRS resource indication information, using the number of transmission layers indicated in the first indication or the number of transmission layers indicated in the second indication, and the second SRS resources indicated in the second indication.

66. The network device according to claim 64, wherein: The processor selects the first SRS resource to be indicated in the first indication and the second SRS resource to be indicated in the second indication respectively from a first SRS resource set and a second SRS resource set configured for the terminal device.

67. The network device according to claim 64, wherein: The first SRS resource includes one or more SRS resources, and / or The second SRS resource includes one or more SRS resources.

68. The network device according to claim 66, wherein: The number of SRS resources in the first SRS resource set is the same as or different from the number of SRS resources in the second SRS resource set.

69. The network device according to any one of claims 64 to 68, wherein: The number of transmission layers indicated in the first indication does not exceed the preset number of transmission layers.

70. The network device according to claim 69, wherein: The preset number of transmission layers is determined by at least one of the following: A first preset number of transmission layers L1, wherein the first preset number of transmission layers L1 is related to the number of transmission layers that can be supported by the terminal device; a second preset number of transmission layers L2, where the second preset number of transmission layers L2 is a number of transmission layers set for the uplink repeated transmission; as well as A third preset number of transmission layers L3, wherein the third preset number of transmission layers L3 is determined by at least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set.

71. The network device according to claim 70, in, The first preset number of transmission layers L1 is determined by the terminal device and then sent to the network device, or the first preset number of transmission layers L1 is determined by the network device; and Among them, when the terminal device supports the maximum number of multiple-input multiple-output MIMO layers and the maximum number of MIMO layers has been configured, the first preset number of transmission layers L1 is the maximum number of MIMO layers; otherwise, the first preset number of transmission layers L1 is the maximum number of transmission layers that the terminal device can support.

72. The network device according to claim 70, wherein: The preset number of transmission layers is the smaller one between the first preset number of transmission layers L1 and the second preset number of transmission layers L2.

73. The network device according to claim 70, wherein: The preset number of transmission layers is the minimum of the following items: The first preset number of transmission layers L1; The second preset number of transmission layers L2; ​​and The third preset number of transmission layers is L3.

74. The network device according to any one of claims 64 to 68, wherein: The number of transmission layers and the first SRS resource indicated in the first indication and the second SRS resource indicated in the second indication are determined by the network device through uplink channel detection of the SRS sent by the terminal device.

75. The network device according to any one of claims 64 to 68, wherein: The processor determines the number of bits of the first indication based on: a preset number of transmission layers or a number of transmission layers to be used for the first transmission determined from the first indication; as well as At least one of the number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set, and / or The processor determines the number of bits of the second indication based on: a preset number of transmission layers or a number of transmission layers to be used for the second transmission determined from the second indication; as well as The number of SRS resources in the first SRS resource set and the number of SRS resources in the second SRS resource set are at least one of the two.

76. The network device according to any one of claims 64 to 68, wherein: The uplink repeated transmission performed by the terminal device is for multiple receiving ends and / or different beam directions, or the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

77. The network device according to any one of claims 64 to 68, wherein: The SRS resource indication information includes a first indication and / or at least one second indication, specifically: The SRS resource indication information includes a first indication, wherein the uplink repeated transmission performed by the terminal device is for a single receiving end and / or a single beam direction.

78. The network device according to any one of claims 64 to 68, wherein: In response to receiving only the first indication, the terminal device performs the uplink repetitive transmission in a non-codebook manner for a single receiving end and / or beam direction.

79. The network device according to any one of claims 64 to 68, wherein: The processor determines a bit value of the first indication based on a first corresponding relationship, wherein the first corresponding relationship is a corresponding relationship between an SRS resource in a first SRS resource set and a first group of bit values; and / or The processor determines a bit value of the second indication based on a second corresponding relationship, wherein the second corresponding relationship is a corresponding relationship between SRS resources in a second SRS resource set and a second group of bit values.

80. The network device according to claim 79, wherein: The terminal device determines the number of transmission layers indicated in the first indication and / or the first SRS resource based on the first corresponding relationship; and / or The terminal device determines the second SRS resource indicated in the second indication based on the number of transmission layers indicated in the first indication and the second correspondence, or the terminal device determines the number of transmission layers and / or the second SRS resource indicated in the second indication based on the second correspondence.

81. The network device according to any one of claims 64 to 68, wherein: When the number of SRS resources in the first SRS resource set is 1, the number of bits of the first indication is 1; and / or When the number of SRS resources in the second SRS resource set is 1, the number of bits of the second indication is 1.

82. The network device according to any one of claims 64 to 68, wherein: When the second indication does not include an indication of the number of transmission layers to be used for the second transmission, the number of bits of the second indication is determined by the processor based on the number of transmission layers indicated in the first indication and the number of SRS resources in the second SRS resource set.

83. The network device according to any one of claims 64 to 68, wherein: The processor determines the maximum number of bits among the numbers of bits determined based on different numbers of transmission layers and the number of SRS resources of the second SRS resource set as the number of bits of the second indication, each of the different numbers of transmission layers not exceeding a preset number of transmission layers.

84. The network device according to any one of claims 64 to 68, wherein: The receiving end includes a transmitting receiving point TRP.

85. A terminal device, comprising: A transceiver, 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, and executing the transmission method as described in any one of claims 1 to 21.

86. A network device comprising: A transceiver, 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, and executing the transmission method as described in any one of claims 22 to 42.

87. A communication system comprising: At least one terminal device according to any one of claims 43 to 63 and 85; as well as At least one network device according to any one of claims 64 to 84 and 86.

88. A chip, comprising: A processor, used to call and run a computer program from a memory so that a device equipped with the chip executes a transmission method as described in any one of claims 1 to 21.

89. A chip, comprising: A processor, used to call and run a computer program from a memory so that a device equipped with the chip executes a transmission method as described in any one of claims 22 to 42.

90. A computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the transmission method according to any one of claims 1 to 21.

91. A computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the transmission method as described in any one of claims 22 to 42.

92. A computer program product, comprising computer program instructions, which enable a computer to execute the transmission method as claimed in any one of claims 1 to 21.

93. A computer program product, comprising computer program instructions, which enable a computer to execute the transmission method as described in any one of claims 22 to 42.

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