Precoding configuration method and apparatus

Abstract

Provided in the embodiments of the present application are a precoding configuration method and apparatus. The method comprises: a terminal device receiving configuration information from a network device, wherein for SRS resources in an SRS resource set, the usage of which is set to be a codebook, different numbers of antenna ports are configured, and at least one SRS resource is configured with eight ports; and the eight-port transmission of the terminal device is configured with Ng antenna groups and corresponding precoding, and the four-port / two-port transmission of the terminal device is configured with a codebook subset, or the eight-port transmission of the terminal device is configured with the Ng antenna groups and the corresponding precoding.

Description

Precoding configuration method and device Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] In fifth-generation (5G) or new radio (NR) mobile communication systems, prior to Rel-18, a terminal device (UE) could support up to 4 Tx for uplink transmission. Based on the coherence type of the UE, the UE can be divided into non-coherent UE, partially coherent UE, and fully coherent UE. In NR Rel-15, the concept of codebook subsets was introduced, and the corresponding codebook subset can be configured based on the coherence type of the UE.

[0003] Rel-16 also introduces the uplink full-power transmission feature, which increases the uplink transmit power of terminal devices that support uplink MIMO. Uplink full-power transmission includes Mode 0, Mode 1, and Mode 2, which are referred to as Full Power Mode 0 (ul-FullPwrMode), Full Power Mode 1 (ul-FullPwrMode1), and Full Power Mode 2 (ul-FullPwrMode2).

[0004] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0005] Summary of the Invention

[0006] In NR Rel-18, the uplink transmission of the terminal device can support 8Tx, and the concept of antenna group is introduced. Different coherence types support different numbers of antenna groups (Ng). For fully coherent UE, Ng = 1. For partially coherent UE, one case is that the UE has two antenna groups, Ng = 2; the other case is that the UE has four antenna groups, Ng = 4. For non-coherent UE, Ng = 8. Correspondingly, for fully coherent precoding, Ng = 1; for partially coherent precoding, Ng = 2 or Ng = 4; for non-coherent precoding, Ng = 8.

[0007] The inventors discovered that for an 8-Tx terminal device supporting full-power Mode 2, if the SRS resources in the sounding reference signal (SRS) resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, then the Ng value must be configured for 8-port operation, while the codebook subset must be configured for 4-port / 2-port operation. However, there is currently no clear solution for how to configure Ng and the codebook subset, and whether they should be configured independently.

[0008] To address at least one of the above problems, embodiments of the present application provide a precoding configuration method and apparatus.

[0009] According to one aspect of an embodiment of the present application, a precoding configuration method is provided, which is applied to a terminal device capable of supporting 8-transmission (8Tx) uplink transmission, the terminal device supporting full power mode 2, the method comprising:

[0010] The terminal device receives configuration information from the network device;

[0011] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0012] According to another aspect of an embodiment of the present application, a precoding configuration apparatus is provided, configured in a terminal device capable of supporting 8-transmission (8Tx) uplink transmission, the terminal device supporting full power mode 2, the apparatus comprising:

[0013] a receiving unit, configured to receive configuration information from a network device;

[0014] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0015] According to another aspect of an embodiment of the present application, a precoding configuration method is provided, which is applied to a network device. The method includes:

[0016] The network device sends configuration information to the terminal device;

[0017] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0018] According to another aspect of an embodiment of the present application, a precoding configuration apparatus is provided, configured in a network device, the apparatus comprising:

[0019] a sending unit, configured to send configuration information to a terminal device;

[0020] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0021] According to another aspect of an embodiment of the present application, a communication system is provided, including:

[0022] A terminal device capable of supporting 8Tx uplink transmission and supporting full power mode 2; the terminal device receives configuration information from a network device; wherein, for a sounding reference signal (SRS) resource in an SRS resource set with a first parameter (usage) set to a first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding;

[0023] The network device sends the configuration information.

[0024] One of the beneficial effects of the embodiments of the present application is that: for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, it is possible to clearly define how Ng and the codebook subset are configured.

[0025] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0026] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0027] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0029] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0030] FIG2 is a schematic diagram of codebook subset configuration;

[0031] FIG3 is another schematic diagram of codebook subset configuration;

[0032] FIG4 is a schematic diagram of Ng value and corresponding precoding;

[0033] FIG5 is a schematic diagram of a precoding configuration method according to an embodiment of the present application;

[0034] FIG6 is a schematic diagram of Ng value and codebook subset configuration according to an embodiment of the present application;

[0035] FIG7 is another schematic diagram of Ng value and codebook subset configuration according to an embodiment of the present application;

[0036] FIG8 is another schematic diagram of Ng value and codebook subset configuration according to an embodiment of the present application;

[0037] FIG9 is another schematic diagram of Ng value and codebook subset configuration according to an embodiment of the present application;

[0038] FIG10 is another schematic diagram of the Ng value and codebook subset configuration according to an embodiment of the present application;

[0039] FIG11 is another schematic diagram of Ng value and codebook subset configuration according to an embodiment of the present application;

[0040] FIG12 is an example diagram of determining the length of the TPMI domain according to an embodiment of the present application;

[0041] FIG13 is another example diagram of determining the TPMI domain length according to an embodiment of the present application;

[0042] FIG14 is another example diagram of determining the TPMI domain length according to an embodiment of the present application;

[0043] FIG15 is another schematic diagram of a precoding configuration method according to an embodiment of the present application;

[0044] FIG16 is a schematic diagram of a precoding configuration device according to an embodiment of the present application;

[0045] FIG17 is another schematic diagram of the precoding configuration apparatus according to an embodiment of the present application;

[0046] FIG18 is a schematic diagram of a network device according to an embodiment of the present application;

[0047] Figure 19 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0049] In the embodiments of the present application, the terms "first," "second," etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," etc. refer to the presence of the stated features, elements, components, or components, but do not exclude the presence or addition of one or more other features, elements, components, or components.

[0050] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0051] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0052] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other communication protocols currently known or to be developed in the future.

[0053] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0054] Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio head (RRH, Remote Radio Head), remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). The term "base station" can include some or all of their functions. Each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0055] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0056] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0057] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0058] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0059] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0060] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0061] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0062] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0063] NR Rel-15 introduced the concept of codebook subsets, which can be configured based on the terminal device's coherence type. Codebook subsets include fullyAndPartialAndNonCoherent, partialAndNonCoherent, and nonCoherent. This application is not limited to these terms; other terms may also be used. Different codebook subsets contain different precoding types.

[0064] Figure 2 is a schematic diagram of codebook subset configuration, schematically illustrating the codebook subset configuration for 4 antenna ports. Figure 3 is another schematic diagram of codebook subset configuration, schematically illustrating the codebook subset configuration for 2 antenna ports.

[0065] As shown in Figures 2 and 3, the network equipment (gNB) can configure different precoding schemes for different coherence types of UEs. For example, for fully coherent UEs, the gNB can configure fully coherent precoding, partially coherent precoding, and incoherent precoding. For partially coherent UEs, the gNB can configure partially coherent precoding and incoherent precoding. For incoherent UEs, the gNB can only configure incoherent precoding.

[0066] In NR Rel-16, full power operation modes are introduced, including: full power mode 0 (corresponding to UE capability ul-FullPwrMode and RRC parameter ul-FullPowerTransmission set to fullpower), full power mode 1 (corresponding to UE capability ul-FullPwrMode1 and RRC parameter ul-FullPowerTransmission set to fullpowerMode1), and full power mode 2 (corresponding to UE capability ul-FullPwrMode2-MaxSRS-ResInSet and RRC parameter ul-FullPowerTransmission set to fullpowerMode2).

[0067] For full power mode 2, the SRS resources in the SRS resource set with the parameter usage set to 'codebook' can be configured with the same number of antenna ports or with different numbers of antenna ports. For example, SRS resources of {1-port, 2-ports, 4-ports} can be configured for the UE. In NR Rel-16, full power mode 2 can be used for fully coherent UEs, partially coherent UEs, and non-coherent UEs.

[0068] In NR Rel-15, RRC can configure the parameter maxRank to indicate the maximum number of layers allowed for Physical Uplink Shared Channel (PUSCH) transmission. The value of maxRank affects the length of the field used for the Transmission Precoding Matrix Indicator (TPMI) in the Downlink Control Information (DCI). In NR Rel-15, the maximum value of maxRank is 4.

[0069] NR Rel-18 introduces the concept of antenna groups. The number of antenna groups (Ng) supported by a terminal device depends on the terminal's capabilities. For example, based on the supported Ng values ​​reported by the UE, the gNB can configure precoding for the UE corresponding to a specific Ng value.

[0070] Figure 4 is a diagram of Ng values ​​and corresponding precoding, showing the correspondence between Ng values ​​and different types of precoding. In NR Rel-18, up to 8 layers of PUSCH transmission can be supported, and accordingly, the maximum value of maxRank is also extended to 8.

[0071] The inventors discovered that for an 8Tx UE supporting full-power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, then the Ng value must be configured for 8-port operation, and the codebook subset must be configured for 4-port / 2-port operation. However, whether the Ng value and codebook subset can be configured independently requires clear definition.

[0072] In addition, for 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, when the parameter maxRank is configured to be greater than 4 (for example, 8), if the SRS resource of 4-ports is indicated, then inconsistent understanding may occur because the maximum value of maxRank for 4-ports operation is 4.

[0073] In NR Rel-16 / Rel-17, for UEs supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, when determining the length of the Precoding information and number of layers field (hereinafter referred to as the TPMI field) in the DCI, TS38.212 (Section 7.3.1.1.2, Section 7.3.1.1.3) has the following definition in Table 1:

[0074] Table 1

[0075] It can be seen that the length of the TPMI field in the DCI depends on the maximum number of antenna ports of the SRS resource.

[0076] However, in Rel-18, for 8-Tx UEs supporting Full Power Mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8 ports, the 4-port TPMI field may be the longest, depending on the Ng value and the codebook subset configuration. In this case, the solution defined in Table 1 does not work.

[0077] The above schematically introduces the contents related to the embodiments of the present application and some problems discovered by the inventors. The embodiments of the present application are further explained below.

[0078] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, an MIB, system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0079] In the following description, to avoid confusion, the terms "PDCCH" and "Physical Downlink Control Channel" or "downlink control information" are interchangeable, and the terms "PDSCH" and "Physical Downlink Data Channel" or "downlink data" are also interchangeable. Furthermore, transmitting or receiving a PDCCH can be understood as transmitting or receiving downlink control information carried by the PDCCH; transmitting or receiving a PDSCH can be understood as transmitting or receiving downlink data carried by the PDSCH.

[0080] Embodiments of the first aspect

[0081] The present invention provides a precoding configuration method, which is described from the perspective of a terminal device capable of supporting 8-transmission (8Tx) uplink transmission, wherein the terminal device supports full power mode 2. FIG5 is a schematic diagram of the precoding configuration method according to the present invention. As shown in FIG5 , the method includes:

[0082] 502, the terminal device receives configuration information from the network device;

[0083] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0084] It is worth noting that FIG5 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG5 above.

[0085] In some embodiments, the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset.

[0086] For example, for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, then both the Ng value and the codebook subset should be configured for the UE. The precoding corresponding to the Ng value is applied to the 8-port PUSCH transmission, and the precoding corresponding to the codebook subset is applied to the PUSCH transmission with less than 8-ports (4-ports / 2-ports).

[0087] In this embodiment of the present application, when the gNB configures the Ng value, it also configures the codebook (or precoder) corresponding to the Ng value. The terms "configure Ng," "configure the Ng value," "configure the precoder corresponding to the Ng value," and "configure Ng and the corresponding precoder" may be equivalent or interchangeable.

[0088] In some embodiments, for a fully coherent terminal device, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support.

[0089] For example, for a fully coherent 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, the Ng value and the codebook subset configuration are independent of each other. The number of co-phased ports for precoding in the 4-ports / 2-ports codebook subset cannot exceed the maximum number of co-phased ports for 8-ports precoding supported by the UE.

[0090] Figure 6 is a schematic diagram of the Ng value and codebook subset configuration of an embodiment of the present application, showing the case where the Ng value and codebook subset are independently configured for a fully coherent terminal device. In one example, for a fully coherent UE, the number of ports of SRS resources is configured as {8-ports, 4-ports} or {8-ports, 4-ports, 1-port}. As shown in Figure 6, for 8-ports, the value of Ng can be configured to any one of {Ng=1, 2, 4, 8}. For 4-ports, the codebook subset can be configured to any one of {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}.

[0091] In another example, for a fully coherent UE, the number of SRS resource ports is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng = 1, 2, 4, 8}. For 2-ports, the codebook subset can be configured as any one of {fullyAndPartialAndNonCoherent, nonCoherent}.

[0092] In another example, for a fully coherent UE, the number of ports of SRS resources is configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng = 1, 2, 4, 8}. For 4-ports / 2-ports, the codebook subset can be configured as any one of {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}. When the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0093] In another example, for a fully coherent 8-Tx UE supporting full-power Mode 2, the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets may depend on the UE's capabilities. The gNB configures the corresponding Ng values ​​and codebook subsets based on the UE's capabilities. For example, the combinations of Ng values ​​and codebook subsets may be as described in the examples above in the embodiments of this application.

[0094] In some embodiments, for a fully coherent terminal device, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

[0095] For example, for a fully coherent 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the configuration of the codebook subset depends on the configured Ng value. For example, the number of co-phase ports for 4-ports / 2-ports precoding cannot exceed the number of co-phase ports for 8-ports precoding corresponding to the configured Ng value. Alternatively, the number of co-phase ports for 4-ports / 2-ports precoding cannot exceed the maximum number of co-phase ports for 8-ports precoding that the UE can support.

[0096] Figure 7 is another schematic diagram of the Ng value and codebook subset configuration of an embodiment of the present application, showing the case of the association configuration of the Ng value and the codebook subset for a fully coherent terminal device. In one example, for a fully coherent UE, the number of ports of SRS resources is configured as {8-ports, 4-ports} or {8-ports, 4-ports, 1-port}. As shown in Figure 7, for 8-ports, the value of Ng can be configured as any one of {Ng=1, 2, 4, 8}. When Ng=1 is configured, for 4-ports, the codebook subset can be configured as fullyAndPartialAnd NonCoherent, or the codebook subset of 4-ports can be configured as any one of {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}. When Ng=2 or Ng=4 is configured, for 4-ports, the codebook subset can be configured as partialAndNonCoherent, or the codebook subset for 4-ports can be configured as any one of {partialAndNonCoherent, nonCoherent}. When Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent.

[0097] In another example, for fully coherent UEs, the number of ports of SRS resources is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng=1, 2, 4, 8}. When Ng=1 is configured, for 2-ports, the codebook subset can be configured as fullyAndPartialAnd NonCoherent, or the codebook subset of 2-ports can be configured as any one of {fullyAndPartialAndNonCoherent, nonCoherent}. When Ng=2 or Ng=4 is configured, for 2-ports, the codebook subset can be configured as nonCoherent. When Ng=8 is configured, for 2-ports, the codebook subset can be configured as nonCoherent.

[0098] In another example, for a fully coherent UE, the number of ports of SRS resources is configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng=1, 2, 4, 8}. When Ng=1 is configured, for 4-ports / 2-ports, the codebook subset can be configured as fullyAndPartialAndNonCoherent, or the codebook subset can be configured as any one of {fullyAndPartial AndNonCoherent, partialAndNonCoherent, nonCoherent}. When Ng=2 or Ng=4 is configured, for 4-ports / 2-ports, the codebook subset can be configured as partialAndNonCoherent, or the codebook subset can be configured as any one of {partialAndNonCoherent, nonCoherent}. When Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent. When the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0099] In another example, for a fully coherent 8-Tx UE supporting full-power Mode 2, the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets may depend on the UE's capabilities. The gNB configures the corresponding Ng values ​​and codebook subsets based on the UE's capabilities. For example, the combinations of Ng values ​​and codebook subsets may be as described in the aforementioned examples of the present application.

[0100] In some embodiments, for a partially coherent terminal device with two antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support.

[0101] For example, for an 8Tx UE with two partially coherent antenna sets and supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, the Ng value and the codebook subset configuration are independent of each other. The number of co-phased ports for precoding in the 4-ports / 2-ports codebook subset cannot exceed the maximum number of co-phased ports for 8-ports precoding supported by the UE.

[0102] Figure 8 is another schematic diagram of the Ng value and codebook subset configuration of an embodiment of the present application, showing the case where the Ng value and codebook subset are independently configured for a partially coherent terminal device with two antenna sets. In one example, for some UEs with two antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports} or {8-ports, 4-ports, 1-port}. As shown in Figure 8, for 8-ports, the value of Ng can be configured to any one of {Ng=2, 4, 8}. For 4-ports, the codebook subset can be configured to any one of {partialAndNonCoherent, nonCoherent}. Alternatively, for 4-ports, the codebook subset can be configured to any one of {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}.

[0103] In another example, for some UEs with two antenna sets, the number of ports of SRS resources is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the Ng value can be configured as any one of {Ng = 2, 4, 8}. For 2-ports, the codebook subset can be configured as non-Coherent. Alternatively, for 2-ports, the codebook subset can be configured as any one of {fullyAndPartialAndNonCoherent,nonCoherent}.

[0104] In another example, for some UEs with two antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the Ng value can be configured as any of {Ng = 2, 4, 8}. For 4-ports / 2-ports, the codebook subset can be configured as any of {partialAndNonCoherent, nonCoherent}. When the codebook subset is configured as partialAnd NonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent. Alternatively, for 4-ports / 2-ports, the codebook subset can be configured as any one of {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}; when the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered to be nonCoherent.

[0105] In another example, for an 8Tx UE with two partially coherent antenna sets and supporting full-power Mode 2, the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets may depend on the UE's capabilities. The gNB configures the corresponding Ng values ​​and codebook subsets based on the UE's capabilities. For example, the combinations of Ng values ​​and codebook subsets may be as described in the aforementioned examples of the present application.

[0106] In some embodiments, for a partially coherent terminal device with two antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

[0107] For example, for an 8Tx UE with partial coherence of two antenna sets and supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the configuration of the codebook subset depends on the configured Ng value. For example, the number of co-phase ports for 4-ports / 2-ports precoding cannot exceed the number of co-phase ports for 8-ports precoding corresponding to the configured Ng value. Alternatively, the number of co-phase ports for 4-ports / 2-ports precoding cannot exceed the maximum number of co-phase ports for 8-ports precoding that the UE can support.

[0108] Figure 9 is another schematic diagram of the Ng value and codebook subset configuration of an embodiment of the present application, showing the case where the Ng value and codebook subset are associated with the configuration for a partially coherent terminal device with two antenna sets. In one example, for some UEs with two antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports} or {8-ports, 4-ports, 1-port}. As shown in Figure 9, for 8-ports, the value of Ng can be configured to any one of {Ng=2, 4, 8}. When Ng=2 or Ng=4 is configured, for 4-ports, the codebook subset can be configured as partialAndNonCoherent. When Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent. Alternatively, when Ng=2 is configured, for 4-ports, the codebook subset can be configured as fullyAndPartialAndNonCoherent; when Ng=4 is configured, for 4-ports, the codebook subset can be configured as partialAndNonCoherent; when Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent.

[0109] In another example, for some UEs with two antenna sets, the number of ports of SRS resources is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng=2, 4, 8}. When Ng=2 or Ng=4 is configured, for 2-ports, the codebook subset can be configured as nonCoherent. When Ng=8 is configured, for 2-ports, the codebook subset can be configured as nonCoherent. Alternatively, when Ng=2 or Ng=4 is configured, for 2-ports, the codebook subset can be configured as fullyAndPartialAnd NonCoherent; when Ng=8 is configured, for 2-ports, the codebook subset can be configured as nonCoherent.

[0110] In another example, for some UEs with two antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng=2, 4, 8}. When Ng=2 or Ng=4 is configured, for 4-ports / 2-ports, the codebook subset can be configured as partialAndNonCoherent. When Ng=8 is configured, for 4-ports / 2-ports, the codebook subset can be configured as nonCoherent. When the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered to be nonCoherent. Alternatively, when Ng is configured as 2, for 4-ports / 2-ports, the codebook subset can be configured as fullyAndPartialAnd NonCoherent. When Ng is configured as 4, for 4-ports / 2-ports, the codebook subset can be configured as partialAnd NonCoherent. When Ng is configured as 8, for 4-ports / 2-ports, the codebook subset can be configured as nonCoherent. When the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0111] In another example, for an 8Tx UE with two partially coherent antenna sets and supporting full-power Mode 2, the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets may depend on the UE's capabilities. The gNB configures the corresponding Ng values ​​and codebook subsets based on the UE's capabilities. For example, the combinations of Ng values ​​and codebook subsets may be as described in the aforementioned examples of the present application.

[0112] In some embodiments, for a partially coherent terminal device with four antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support.

[0113] For example, for an 8Tx UE with partial coherence and full power mode 2 support with four antenna sets, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, the Ng value and the codebook subset configuration are independent of each other. The number of co-phased ports for precoding in the 4-ports / 2-ports codebook subset cannot exceed the maximum number of co-phased ports for 8-ports precoding supported by the UE.

[0114] Figure 10 is another schematic diagram of the Ng value and codebook subset configuration of an embodiment of the present application, showing the case where the Ng value and codebook subset are independently configured for a partially coherent terminal device with four antenna sets. In one example, for some UEs with four antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports} or {8-ports, 4-ports, 1-port}. As shown in Figure 10, for 8-ports, the value of Ng can be configured to any one of {Ng=4,8}. For 4-ports, the codebook subset can be configured to any one of {partialAndNonCoherent, nonCoherent}.

[0115] In another example, for some UEs with four antenna sets, the number of ports of SRS resources is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng = 4, 8}. For 2-ports, the codebook subset can be configured as non-Coherent. Alternatively, for 2-ports, the codebook subset can be configured as any one of {fullyAndPartialAndNonCoherent, non-Coherent}.

[0116] In another example, for some UEs with four antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any of {Ng = 4, 8}. For 4-ports / 2-ports, the codebook subset can be configured as any of {partialAndNonCoherent, nonCoherent}. When the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0117] In another example, for an 8Tx UE with partially coherent four antenna sets and full-power Mode 2 support, the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets may depend on the UE's capabilities. The gNB configures the corresponding Ng values ​​and codebook subsets based on the UE's capabilities. For example, the combinations of Ng values ​​and codebook subsets may be as described in the aforementioned examples of the present application.

[0118] In some embodiments, for a partially coherent terminal device with four antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

[0119] For example, for an 8Tx UE with partial coherence and full power mode 2 with four antenna sets, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the configuration of the codebook subset depends on the configured Ng value. For example, the number of co-phase ports for 4-ports / 2-ports precoding cannot exceed the number of co-phase ports for 8-ports precoding corresponding to the configured Ng value. Alternatively, the number of co-phase ports for 4-ports / 2-ports precoding cannot exceed the maximum number of co-phase ports for 8-ports precoding that the UE can support.

[0120] Figure 11 is another schematic diagram of the Ng value and codebook subset configuration of an embodiment of the present application, showing the case of the Ng value and codebook subset association configuration for a partially coherent terminal device with four antenna sets. In one example, for some UEs with four antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports} or {8-ports, 4-ports, 1-port}. As shown in Figure 11, for 8-ports, the value of Ng can be configured as any one of {Ng=4,8}. When Ng=4 is configured, for 4-ports, the codebook subset can be configured as partialAndNonCoherent. When Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent. Alternatively, when Ng=4 or Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent.

[0121] In another example, for some UEs with four antenna sets, the number of ports of SRS resources is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. As shown in Figure 11, for 8-ports, the value of Ng can be configured as any one of {Ng=4, 8}. When Ng=4 or Ng=8 is configured, for 2-ports, the codebook subset can be configured as nonCoherent. Alternatively, when Ng=4 is configured, for 4-ports, the codebook subset can be configured as fullyAndPartialAndNonCoherent; when Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent.

[0122] In another example, for some UEs with four antenna sets, the number of ports of SRS resources is configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng can be configured as any one of {Ng=4, 8}. When Ng=4 is configured, for 4-ports / 2-ports, the codebook subset can be configured as partialAndNonCoherent or nonCoherent. When Ng=8 is configured, for 4-ports, the codebook subset can be configured as nonCoherent. When the codebook subset is configured as partialAndNonCoherent, if a 2-port SRS resource is indicated, the codebook subset is considered to be nonCoherent.

[0123] In another example, for an 8Tx UE with partially coherent four antenna sets and full-power Mode 2 support, the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets may depend on the UE's capabilities. The gNB configures the corresponding Ng values ​​and codebook subsets based on the UE's capabilities. For example, the combinations of Ng values ​​and codebook subsets may be as described in the aforementioned examples of the present application.

[0124] In some embodiments, for a non-coherent terminal device, the number of antenna sets Ng is configured as Ng=8; and the 4-port / 2-port codebook subset of the terminal device is configured as nonCoherent.

[0125] For example, for an 8Tx UE that is non-coherent and supports full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the Ng value should be configured as Ng = 8. For 4-ports and / or 2-ports, the codebook subset should be configured as non-Coherent.

[0126] The above schematically illustrates the configuration according to the coherent type, but the present application is not limited thereto.

[0127] In some embodiments, as shown in FIG5 , the method further includes:

[0128] 501, the terminal device reports capability information to the network device;

[0129] The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

[0130] In some embodiments, the network device configures the number of antenna sets Ng and / or codebook subset for the terminal device according to the capability information.

[0131] For example, for an 8Tx UE (including fully coherent UEs, partially coherent UEs, and non-coherent UEs) supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured for 8-ports, the UE shall report the supported Ng values ​​for 8-ports, the supported codebook subsets for 4-ports / 2-ports, and the supported combinations of Ng values ​​and codebook subsets (for example, see Figures 6 to 11 for combination information). The gNB shall configure the corresponding Ng value and codebook subset based on the UE's capabilities.

[0132] Table 2 is an example of a modification corresponding to TS 38.214 (this example can be added to Section 6.1.1.1 of TS 38.214, but the present application is not limited thereto):

[0133] Table 2

[0134] In some embodiments, the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding. The codebook subset or precoding of the 4-port / 2-port transmission of the terminal device is obtained according to predefined information and / or the number of antenna sets Ng configured.

[0135] For example, for an 8Tx UE (including fully coherent UE, partially coherent UE, and non-coherent UE) supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the gNB only configures the Ng value for the UE.

[0136] In one example, the 4-ports / 2-ports codebook subsets can be derived from the configured Ng value according to a predefined mapping. For example, the fullyAndPartialAndNonCoherent codebook subset corresponds to Ng=1; the partialAndNonCoherent codebook subset corresponds to Ng=2 or Ng=4; and the nonCoherent codebook subset corresponds to Ng=8.

[0137] In another example, the configured Ng value can be applicable to 4-ports / 2-ports. For example, when Ng=1, only full phase-interference coding of 4-ports / 2-ports is configured; when Ng=2 or Ng=4, only partial phase-interference coding of 4-ports or full phase-interference coding of 2-ports is configured; when Ng=8, only non-phase-interference coding of 4-ports / 2-ports is configured.

[0138] It can be seen from the above embodiment that for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, it is possible to clearly configure the Ng value of 8-ports and how to configure the codebook subset of 4-ports / 2-ports.

[0139] The following further describes the setting of maxRank. The following content can be combined with the above embodiment or executed independently.

[0140] In some embodiments, when the second parameter (maxRank) is configured to be greater than 4 and the SRS resources of 4 ports are indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 4; when the second parameter (maxRank) is configured to be greater than 4 and the SRS resources of 2 ports are indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 2.

[0141] For example, for an 8Tx UE supporting full power mode 2 (including fully coherent UEs, partially coherent UEs with two antenna sets, partially coherent UEs with four antenna sets, and incoherent UEs), if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, when the parameter maxRank is configured to be greater than 4, if a 4-ports SRS resource is indicated, then maxRank is considered to be 4; if a 2-ports SRS resource is indicated, then maxRank is considered to be 2.

[0142] Table 3 is an example of a modification corresponding to TS 38.212 (this example can be added to Section 7.3.1.1.2 and Section 7.3.1.1.3 of TS 38.212, but the present application is not limited thereto):

[0143] Table 3

[0144] Table 4 is another example of a modification corresponding to TS 38.212 (this example can be applied to Section 7.3.1.1.2 and Section 7.3.1.1.3 of TS 38.212, but the present application is not limited thereto):

[0145] Table 4

[0146] It can be seen from the above embodiment that for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the setting of maxRank can be clarified.

[0147] The following further describes the TPMI domain in the DCI. The following content can be combined with the above embodiments or performed independently. In addition, this application uses the TPMI domain as an example for description, but the application is not limited thereto. For example, the TPMI domain can be called by other names or replaced by other domains.

[0148] In some embodiments, the precoding used for uplink transmission is indicated by one or more transmit precoding matrix indication (TPMI) fields in downlink control information (DCI).

[0149] For example, for an 8Tx UE supporting full power mode 2 (including fully coherent UE, partially coherent UE with two antenna sets, partially coherent UE with four antenna sets, and non-coherent UE), if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, then the length of the field used for TPMI indication (TPMI field) in the DCI should be determined in advance.

[0150] In some embodiments, for 8-port / 4-port / 2-port, the number of transmit precoding matrix indicator (TPMI) fields is the same; the length of the transmit precoding matrix indicator (TPMI) field is determined by the TPMI field width or precoding number corresponding to the first SRS resource. For example, among the configured SRS resources, the TPMI field corresponding to the first SRS resource has the longest bit width or the largest number of precoding numbers.

[0151] For example, the number of TPMI fields is the same for 8-ports, 4-ports, and 2-ports. In this case, the length of the TPMI field is determined by the bit width of the TPMI or the number of precoders corresponding to a certain SRS resource; among all configured SRS resources, the TPMI corresponding to this SRS resource has the longest bit width or the largest number of precoders.

[0152] In one example, K SRS resources are configured in the SRS resource set; for SRS resource i, its corresponding TPMI bit width is L i (i=1,…K). Then the final length of the TPMI domain can be determined as follows: L=max{L1,L2,…,L K}

[0153] For a certain SRS resource, if its corresponding TPMI bit width is less than max{L1,L2,…,L K}, then some all-zero most significant bits (MSBs) will be inserted into the TPMI field.

[0154] Figure 12 is an example diagram for determining the TPMI domain length according to an embodiment of the present application. As shown in Figure 12, for example, if three SRS resources are configured, the first SRS resource is 2-ports, and the corresponding TPMI bit width is 3 bits; the second SRS resource is 4-ports, and the corresponding TPMI bit width is 5 bits; the third SRS resource is 8-ports, and the corresponding TPMI bit width is 3 bits. The final TPMI domain length is determined to be 5 bits. When the first or third SRS resource is indicated (i.e., 2-port or 8-port is indicated), the first two bits of the TPMI domain are set to all zeros, i.e., the two most significant bits (MSBs) are set to 0.

[0155] Table 5 is an example of a modification corresponding to TS 38.212 (this example can be applied to Section 7.3.1.1.2 and Section 7.3.1.1.3 of TS 38.212, but the present application is not limited thereto):

[0156] Table 5

[0157] In another example, K SRS resources are configured in the SRS resource set; for SRS resource i, the corresponding number of precoding is N i (i=1,…K). Then the length of the TPMI domain can be determined as follows:

[0158] For a certain SRS resource, if the corresponding precoding quantity is less than max{N1,N2,…,N K}, then some all-zero most significant bits (MSBs) are inserted into the TPMI field.

[0159] Table 6 is an example of a modification corresponding to TS 38.212 (this example can be applied to Section 7.3.1.1.2 and Section 7.3.1.1.3 of TS 38.212, but the present application is not limited thereto):

[0160] Table 6

[0161] In some embodiments, the number of transmit precoding matrix indication (TPMI) fields is different for 8-ports, 4-ports, and 2-ports; for example, there are two TPMI fields for 8-ports and one TPMI field for 4-ports / 2-ports. The length of all transmit precoding matrix indication (TPMI) fields for the 8-ports is used to determine the field length of the DCI.

[0162] FIG13 is another example diagram of determining the TPMI domain length according to an embodiment of the present application. As shown in FIG13 , for example, two SRS resources are configured, the first SRS resource is 4-ports, and the corresponding TPMI bit width is X bits; the second SRS resource is 8-ports, and the corresponding TPMI bit width is 2Y bits, Y <X<2Y。

[0163] As shown in Figure 13, the length of the 8-port TPMI field is used to determine the DCI field length. TPMI#1 (Y bits) and TPMI#2 (Y bits) are present in the DCI. When 4-port is indicated, the X bits of TPMI#1 and TPMI#2 are used for 4-port TPMI indication, and the MSB (2Y-X) bits are set to 0. When 8-port is indicated, TPMI#1 and TPMI#2 are used for 8-port TPMI indication.

[0164] In some embodiments, for 8-port / 4-port / 2-port, the number of transmit precoding matrix indication (TPMI) fields is different; the length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is consistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port.

[0165] For example, the length of a certain TPMI domain (or certain TPMI domains) of 8-ports, such as the first TPMI domain, needs to be consistent with that of 4-ports / 2-ports.

[0166] In some embodiments, for 8-port / 4-port / 2-port, the number of transmit precoding matrix indication (TPMI) fields is different; the length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is inconsistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port; the bit width of the transmit precoding matrix indication (TPMI) field is determined by the maximum length of the transmit precoding matrix indication (TPMI) field of the 8-port / 4-port / 2-port.

[0167] For example, if the length of a TPMI domain (or several TPMI domains) in an 8-ports architecture is inconsistent with that of the 4-ports / 2-ports architecture, the final bit width of the TPMI domain will depend on the maximum TPMI length corresponding to the 8-ports / 4-ports / 2-ports architecture. If the TPMI length corresponding to an SRS resource is less than the maximum TPMI length, some all-zero most significant bits will be inserted into the TPMI domain.

[0168] FIG14 is another example diagram of determining the TPMI domain length according to an embodiment of the present application. As shown in FIG14 , for example, two SRS resources are configured, the first SRS resource is 4-ports, and the corresponding TPMI bit width is X bits; the second SRS resource is 8-ports, and the corresponding TPMI bit width is 2Y bits, Y <X<2Y。

[0169] As shown in Figure 14, the length of the first TPMI field in the 8-port format is used to determine the DCI field length. TPMI#1 (X bits) and TPMI#2 (Y bits) are present in the DCI. When 4-ports is indicated, TPMI#1 is used for the 4-port TPMI indication, and TPMI#2 is ignored. When 8-ports is indicated, TPMI#1 and TPMI#2 are used for the 8-port TPMI indication, with the MSB (XY) bits of TPMI#1 set to 0.

[0170] In some embodiments, the number of antenna sets Ng is configured for 8 ports and a codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field of the 8-port.

[0171] For example, for an 8Tx UE supporting full power mode 2 (including fully coherent UEs, partially coherent UEs with two antenna sets, partially coherent UEs with four antenna sets, and non-coherent UEs), if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, when configuring the Ng value for the UE's 8-ports transmission and configuring the codebook subset for the UE's 4-ports / 2-ports transmission, the length of the TPMI field of 4-ports / 2-ports should be less than or equal to the length of the TPMI field of 8-ports.

[0172] It can be seen from the above embodiment that for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports and at least one SRS resource is configured as 8-ports, the length of the TPMI field can be clarified.

[0173] Tables 1 to 6 above only schematically illustrate embodiments of the present application, and the present application is not limited thereto. In addition, for some parameters or terms in the tables, reference may be made to the relevant art and will not be repeated here. Full power mode 2 of the embodiment of the present application may be referred to as Mode 2, for example, other names may also be used. For specific content, reference may be made to ul-FullPwrMode2 in the relevant art, but the present application is not limited thereto. Modes having the same or similar functions as ul-FullPwrMode2 in Rel-16 are all within the scope of the present application.

[0174] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0175] From the above embodiment, it can be seen that for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, it can be clear how Ng and the codebook subset are configured.

[0176] Embodiments of the second aspect

[0177] The embodiment of the present application provides a precoding configuration method, which is described from the perspective of a network device. The embodiment of the second aspect can be combined with the embodiment of the first aspect, and the same contents as the embodiment of the first aspect will not be repeated.

[0178] FIG15 is a schematic diagram of a precoding configuration method according to an embodiment of the present application. As shown in FIG15 , the method includes:

[0179] 1502, the network device sends configuration information to the terminal device;

[0180] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0181] In some embodiments, as shown in FIG15 , the method may further include:

[0182] 1501. The network device receives capability information sent by the terminal device.

[0183] The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

[0184] It is worth noting that FIG15 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be removed. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG15 above.

[0185] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0186] From the above embodiment, it can be seen that for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, it can be clear how Ng and the codebook subset are configured.

[0187] Embodiments of the third aspect

[0188] The embodiment of the present application provides a precoding configuration device, which may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device, and the same contents as those in the embodiment of the first aspect will not be repeated here.

[0189] FIG16 is a schematic diagram of a precoding configuration apparatus according to an embodiment of the present application. As shown in FIG16 , the precoding configuration apparatus 1600 includes:

[0190] A receiving unit 1601 receives configuration information from a network device;

[0191] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0192] In some embodiments, the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset.

[0193] In some embodiments, for a fully coherent terminal device, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support.

[0194] In some embodiments, for a fully coherent terminal device, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

[0195] In some embodiments, for a partially coherent terminal device with two antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support.

[0196] In some embodiments, for a partially coherent terminal device with two antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

[0197] In some embodiments, for a partially coherent terminal device with four antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support.

[0198] In some embodiments, for a partially coherent terminal device with four antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

[0199] In some embodiments, for a non-coherent terminal device, the number of antenna sets Ng is configured as Ng=8; and the 4-port / 2-port codebook subset of the terminal device is configured as nonCoherent.

[0200] In some embodiments, as shown in FIG16 , the apparatus may further include:

[0201] a sending unit 1602, configured to report capability information to the network device;

[0202] The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

[0203] In some embodiments, the network device configures the number of antenna sets Ng and / or codebook subset for the terminal device according to the capability information.

[0204] In some embodiments, the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding; the codebook subset or precoding of the 4-port / 2-port transmission of the terminal device is obtained according to the predefined information and / or the configured number of antenna sets Ng.

[0205] In some embodiments, when the second parameter (maxRank) is configured to be greater than 4 and the SRS resources of 4 ports are indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 4; when the second parameter (maxRank) is configured to be greater than 4 and the SRS resources of 2 ports are indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 2.

[0206] In some embodiments, the precoding used for uplink transmission is indicated by one or more transmit precoding matrix indication (TPMI) fields in downlink control information (DCI).

[0207] In some embodiments, for 8 ports / 4 ports / 2 ports, the number of transmit precoding matrix indication (TPMI) fields is the same; the length of the transmit precoding matrix indication (TPMI) field is determined by the TPMI field bit width or precoding quantity corresponding to the first SRS resource.

[0208] In some embodiments, among the configured SRS resources, the TPMI domain corresponding to the first SRS resource has the longest bit width or the largest number of precodings.

[0209] In some embodiments, the number of transmit precoding matrix indication (TPMI) fields is different for 8-port / 4-port / 2-port; the length of all transmit precoding matrix indication (TPMI) fields of the 8-port is used to determine the field length of the DCI.

[0210] In some embodiments, for 8-port / 4-port / 2-port, the number of transmit precoding matrix indication (TPMI) fields is different; the length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is consistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port.

[0211] In some embodiments, for 8-port / 4-port / 2-port, the number of transmit precoding matrix indication (TPMI) fields is different; the length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is inconsistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port; the bit width of the transmit precoding matrix indication (TPMI) field is determined by the maximum length of the transmit precoding matrix indication (TPMI) field of the 8-port / 4-port / 2-port.

[0212] In some embodiments, the number of antenna sets Ng is configured for 8 ports and a codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field of the 8-port.

[0213] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The precoding configuration device 1600 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0214] In addition, for the sake of simplicity, FIG16 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0215] Through the embodiments of the present application, for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, it can be clarified how Ng and the codebook subset are configured.

[0216] Embodiments of the fourth aspect

[0217] The embodiment of the present application provides a precoding configuration device, which may be, for example, a network device, or one or more components or assemblies configured on the network device, and the contents that are the same as those in the first and second aspects of the embodiment are not repeated here.

[0218] FIG17 is a schematic diagram of a precoding configuration apparatus according to an embodiment of the present application. As shown in FIG17 , the precoding configuration apparatus 1700 includes:

[0219] A sending unit 1701, which sends configuration information to a terminal device;

[0220] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0221] In some embodiments, as shown in FIG17 , the precoding configuration apparatus 1700 may further include:

[0222] A receiving unit 1702, configured to receive capability information sent by the terminal device;

[0223] The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

[0224] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The precoding configuration device 1700 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0225] In addition, for the sake of simplicity, FIG17 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0226] Through the embodiments of the present application, for an 8Tx UE supporting full power mode 2, if the SRS resources in the SRS resource set are configured with different numbers of antenna ports, and at least one SRS resource is configured as 8-ports, it can be clarified how Ng and the codebook subset are configured.

[0227] Embodiments of the fifth aspect

[0228] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the first to fourth aspects of the embodiments will not be repeated.

[0229] In some embodiments, the communication system 100 may include at least:

[0230] A terminal device capable of supporting 8Tx uplink transmission and supporting full power mode 2; the terminal device receives configuration information from a network device; wherein, for a sounding reference signal (SRS) resource in an SRS resource set with a first parameter (usage) set to a first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding;

[0231] The network device sends the configuration information.

[0232] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0233] Figure 18 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 18 , network device 1800 may include a processor 1810 (e.g., a central processing unit (CPU)) and a memory 1820 ; the memory 1820 is coupled to the processor 1810 . The memory 1820 may store various data and may also store an information processing program 1830 , which is executed under the control of the processor 1810 .

[0234] For example, the processor 1810 may be configured to execute a program to implement the precoding configuration method as described in the embodiment of the second aspect. For example, the processor 1810 may be configured to perform the following control: sending configuration information to the terminal device;

[0235] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0236] In addition, as shown in FIG18 , network device 1800 may further include: a transceiver 1840 and an antenna 1850, etc.; wherein, the functions of the above components are similar to those in the prior art and are not further described here. It is worth noting that network device 1800 does not necessarily include all the components shown in FIG18 ; in addition, network device 1800 may also include components not shown in FIG18 , and reference may be made to the prior art for such components.

[0237] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0238] Figure 19 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 19 , terminal device 1900 may include a processor 1910 and a memory 1920. Memory 1920 stores data and programs and is coupled to processor 1910. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0239] For example, the processor 1910 may be configured to execute a program to implement the precoding configuration method as described in the embodiment of the first aspect. For example, the processor 1910 may be configured to perform the following control: receive configuration information from a network device;

[0240] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0241] As shown in Figure 19 , terminal device 1900 may further include: a communication module 1930, an input unit 1940, a display 1950, and a power supply 1960. The functions of these components are similar to those in the prior art and are not described here in detail. It is worth noting that terminal device 1900 does not necessarily include all of the components shown in Figure 19 , and these components are not essential. Furthermore, terminal device 1900 may also include components not shown in Figure 19 , for which reference may be made to the prior art.

[0242] An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the precoding configuration method described in the embodiment of the first aspect.

[0243] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the precoding configuration method described in the embodiment of the first aspect.

[0244] An embodiment of the present application also provides a computer program, wherein when the program is executed in a network device, the program enables the network device to execute the precoding configuration method described in the embodiment of the second aspect.

[0245] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the precoding configuration method described in the embodiment of the second aspect.

[0246] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0247] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0248] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0249] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0250] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0251] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0252] 1. A precoding configuration method, applied to a terminal device capable of supporting 8-transmit (8Tx) uplink transmission, wherein the terminal device supports full power mode 2, the method comprising:

[0253] The terminal device receives configuration information from the network device;

[0254] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0255] 2. The method according to Note 1, wherein the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset.

[0256] 3. The method according to Note 2, wherein, for a fully coherent terminal device, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate;

[0257] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

[0258] 4. The method according to Note 2, wherein, for a fully coherent terminal device, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng;

[0259] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the number of configured antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

[0260] 5. The method according to Note 2, wherein, for a partially coherent terminal device with two antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate;

[0261] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

[0262] 6. The method according to Note 2, wherein, for a partially coherent terminal device with two antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng;

[0263] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the number of configured antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

[0264] 7. The method according to Note 2, wherein, for a partially coherent terminal device having four antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate;

[0265] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

[0266] 8. The method according to Note 2, wherein, for a partially coherent terminal device with four antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng;

[0267] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the number of configured antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

[0268] 9. The method according to Note 2, wherein, for a non-coherent terminal device, the number of antenna sets Ng is configured as Ng=8; and the 4-port / 2-port codebook subset of the terminal device is configured as nonCoherent.

[0269] 10. The method according to any one of Notes 1 to 9, wherein the method further comprises:

[0270] The terminal device reports capability information to the network device;

[0271] The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

[0272] 11. The method according to Note 10, wherein the network device configures the number of antenna sets Ng and / or codebook subset for the terminal device based on the capability information.

[0273] 12. The method according to Note 1, wherein the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding.

[0274] 13. The method according to Note 12, wherein the codebook subset or precoding for the 4-port / 2-port transmission of the terminal device is obtained according to predefined information and / or the number of configured antenna sets Ng.

[0275] 14. The method according to any one of Notes 1 to 13, wherein, when the second parameter (maxRank) is configured to be greater than 4 and a 4-port SRS resource is indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 4;

[0276] In a case where the second parameter (maxRank) is configured to be greater than 4 and a 2-port SRS resource is indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 2.

[0277] 15. The method according to any one of Notes 1 to 14, wherein the precoding used for uplink transmission is indicated by one or more transmit precoding matrix indication (TPMI) fields in downlink control information (DCI).

[0278] 16. The method according to Note 15, wherein the number of transmit precoding matrix indication (TPMI) fields is the same for 8 ports / 4 ports / 2 ports;

[0279] The length of the transmit precoding matrix indication (TPMI) field is determined by the TPMI field bit width or the precoding quantity corresponding to the first SRS resource.

[0280] 17. The method according to Note 16, wherein, among the configured SRS resources, the TPMI domain bit width corresponding to the first SRS resource is the longest or the number of precodings is the largest.

[0281] 18. The method according to note 15, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0282] The length of the 8-port Transmitted Precoding Matrix Indicator (TPMI) field is used to determine the field length of the DCI.

[0283] 19. The method according to Note 15, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0284] The length of the one or more transmit precoding matrix indication (TPMI) fields of the 8-port is consistent with the length of the transmit precoding matrix indication (TPMI) fields of the 4-port / 2-port.

[0285] 20. The method according to Note 15, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0286] The length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is inconsistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port; the bit width of the transmit precoding matrix indication (TPMI) field is determined by the maximum length of the transmit precoding matrix indication (TPMI) field of the 8-port / 4-port / 2-port.

[0287] 21. A method according to any one of Notes 15 to 20, wherein the number of antenna sets Ng is configured for 8-port and the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field of the 8-port.

[0288] 22. A precoding configuration method, applied to a terminal device capable of supporting 8-transmit (8Tx) uplink transmission, the terminal device supporting full power mode 2, the method comprising:

[0289] The terminal device receives configuration information from the network device;

[0290] Wherein, when the second parameter (maxRank) is configured to be greater than 4 and a 4-port SRS resource is indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 4;

[0291] In a case where the second parameter (maxRank) is configured to be greater than 4 and a 2-port SRS resource is indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 2.

[0292] 23. A precoding configuration method, applied to a terminal device capable of supporting 8-transmit (8Tx) uplink transmission, the terminal device supporting full power mode 2, the method comprising:

[0293] The terminal device receives configuration information from the network device;

[0294] The precoding used for uplink transmission is indicated by one or more transmit precoding matrix indication (TPMI) fields in downlink control information (DCI).

[0295] 24. The method according to Note 23, wherein the number of transmit precoding matrix indication (TPMI) fields is the same for 8 ports / 4 ports / 2 ports;

[0296] The length of the transmit precoding matrix indication (TPMI) field is determined by the TPMI field bit width or the precoding quantity corresponding to the first SRS resource.

[0297] 25. The method according to Note 24, wherein, among the configured SRS resources, the TPMI domain bit width corresponding to the first SRS resource is the longest or the number of precodings is the largest.

[0298] 26. The method according to Note 23, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0299] The length of the 8-port Transmitted Precoding Matrix Indicator (TPMI) field is used to determine the field length of the DCI.

[0300] 27. The method according to Note 23, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0301] The length of the one or more transmit precoding matrix indication (TPMI) fields of the 8-port is consistent with the length of the transmit precoding matrix indication (TPMI) fields of the 4-port / 2-port.

[0302] 28. The method according to Note 23, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0303] The length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is inconsistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port; the bit width of the transmit precoding matrix indication (TPMI) field is determined by the maximum length of the transmit precoding matrix indication (TPMI) field of the 8-port / 4-port / 2-port.

[0304] 29. A method according to any one of Notes 23 to 28, wherein the number of antenna sets Ng is configured for 8-port and the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field of the 8-port.

[0305] 30. A precoding configuration method, applied to a network device, the method comprising:

[0306] The network device sends configuration information to the terminal device;

[0307] Among them, for the SRS resources in the sounding reference signal (SRS) resource set with the first parameter (usage) set to the first value (codebook), different numbers of antenna ports are configured, and at least one SRS resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

[0308] 31. The method according to Note 30, wherein the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset.

[0309] 32. The method according to Note 31, wherein, for a fully coherent terminal device, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate;

[0310] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

[0311] 33. The method according to Note 31, wherein, for a fully coherent terminal device, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng;

[0312] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the number of configured antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

[0313] 34. The method according to Note 31, wherein, for a partially coherent terminal device having two antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate;

[0314] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

[0315] 35. The method according to Note 31, wherein, for a partially coherent terminal device with two antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng;

[0316] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the number of configured antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

[0317] 36. The method according to Note 31, wherein, for a partially coherent terminal device having four antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate;

[0318] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

[0319] 37. The method according to Note 31, wherein, for a partially coherent terminal device having four antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng;

[0320] The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the number of configured antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

[0321] 38. The method according to Note 31, wherein, for a non-coherent terminal device, the number of antenna sets Ng is configured as Ng=8; and the 4-port / 2-port codebook subset of the terminal device is configured as nonCoherent.

[0322] 39. The method according to any one of Notes 30 to 38, wherein the method further comprises:

[0323] The network device receives the capability information sent by the terminal device;

[0324] The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

[0325] 40. The method according to Note 39, wherein the network device configures the number of antenna sets Ng and / or codebook subset for the terminal device based on the capability information.

[0326] 41. The method according to Note 30, wherein the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding.

[0327] 42. The method according to Note 41, wherein the codebook subset or precoding for the 4-port / 2-port transmission of the terminal device is obtained according to predefined information and / or the number of configured antenna sets Ng.

[0328] 43. The method according to any one of Notes 30 to 42, wherein, when the second parameter (maxRank) is configured to be greater than 4 and a 4-port SRS resource is indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 4;

[0329] In a case where the second parameter (maxRank) is configured to be greater than 4 and a 2-port SRS resource is indicated, the terminal device determines (considers) that the second parameter (maxRank) is equal to 2.

[0330] 44. A method according to any one of Notes 30 to 43, wherein the precoding used for uplink transmission is indicated by one or more transmit precoding matrix indication (TPMI) fields in downlink control information (DCI).

[0331] 45. The method according to note 44, wherein the number of transmit precoding matrix indication (TPMI) fields is the same for 8 ports / 4 ports / 2 ports;

[0332] The length of the transmit precoding matrix indication (TPMI) field is determined by the TPMI field bit width or the precoding quantity corresponding to the first SRS resource.

[0333] 46. ​​The method according to Note 45, wherein, among the configured SRS resources, the TPMI domain bit width corresponding to the first SRS resource is the longest or the number of precodings is the largest.

[0334] 47. The method according to note 44, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0335] The length of the 8-port Transmitted Precoding Matrix Indicator (TPMI) field is used to determine the field length of the DCI.

[0336] 48. The method according to note 44, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0337] The length of the one or more transmit precoding matrix indication (TPMI) fields of the 8-port is consistent with the length of the transmit precoding matrix indication (TPMI) fields of the 4-port / 2-port.

[0338] 49. The method according to note 44, wherein the number of transmit precoding matrix indication (TPMI) fields is different for 8 ports / 4 ports / 2 ports;

[0339] The length of one or more transmit precoding matrix indication (TPMI) fields of the 8-port is inconsistent with the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port; the bit width of the transmit precoding matrix indication (TPMI) field is determined by the maximum length of the transmit precoding matrix indication (TPMI) field of the 8-port / 4-port / 2-port.

[0340] 50. A method according to any one of Notes 44 to 49, wherein the number of antenna sets Ng is configured for 8-port and the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field of the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field of the 8-port.

[0341] 51. A terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the precoding configuration method as described in any one of Notes 1 to 29.

[0342] 52. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the precoding configuration method as described in any one of Notes 30 to 50.

Claims

1. A precoding configuration device, configured in a terminal device capable of supporting 8Tx uplink transmission, the terminal device supporting full power mode 2, the device comprising: A receiving unit, which receives configuration information from a network device; Among them, for the sounding reference signal resources in the sounding reference signal resource set in which the first parameter usage is set to the first value codebook, different numbers of antenna ports are configured, and at least one sounding reference signal resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

2. The device according to claim 1, wherein: The 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding, and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset.

3. The device according to claim 2, wherein: For a fully coherent terminal device, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device; or, For a fully coherent terminal device, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that the terminal device can support.

4. The device according to claim 2, wherein: For a partially coherent terminal device with two antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding that the terminal device can support; or, For a partially coherent terminal device with two antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of precoded common-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of 8-port precoded common-phase ports corresponding to the configured number of antenna sets Ng, or the terminal The number of co-phase ports precoded in the 4-port / 2-port codebook subset of the device does not exceed the maximum number of co-phase ports of 8-port precoding supported by the terminal device.

5. The device according to claim 2, wherein: For a partially coherent terminal device with four antenna sets, the configuration of the number of antenna sets Ng and the configuration of the codebook subset are independent or separate; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports for 8-port precoding supported by the terminal device; or, For a partially coherent terminal device with four antenna sets, the configuration of the codebook subset is determined by the configuration of the number of antenna sets Ng; the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of co-phase ports of 8-port precoding corresponding to the configured number of antenna sets Ng, or the number of co-phase ports precoded in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of co-phase ports of 8-port precoding that can be supported by the terminal device.

6. The device according to claim 2, wherein: For a non-coherent terminal device, the number of antenna sets Ng is configured as Ng=8; and the 4-port / 2-port codebook subset of the terminal device is configured as nonCoherent.

7. The device according to claim 1, wherein: The device also includes: a sending unit configured to report capability information to the network device; The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

8. The device according to claim 7, wherein: The network device configures the number of antenna sets Ng and / or a codebook subset for the terminal device according to the capability information.

9. The device according to claim 1, wherein: The 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding; The codebook subset or precoding for 4-port / 2-port transmission of the terminal device is obtained according to predefined information and / or the number of configured antenna sets Ng.

10. The device according to claim 1, wherein: When the second parameter maxRank is configured to be greater than 4 and a 4-port sounding reference signal resource is indicated, the terminal device determines that the second parameter maxRank is equal to 4; When the second parameter maxRank is configured to be greater than 4 and the sounding reference signal resource of port 2 is indicated In this case, the terminal device determines that the second parameter maxRank is equal to 2.

11. The device according to claim 1, wherein: The precoding used for uplink transmission is indicated by one or more transmit precoding matrix indication fields in the downlink control information.

12. The device according to claim 11, wherein For 8 ports / 4 ports / 2 ports, the number of the transmit precoding matrix indication fields is the same; The length of the transmit precoding matrix indication field is determined by the transmit precoding matrix indication field bit width or the precoding quantity corresponding to the first sounding reference signal resource.

13. The device according to claim 12, wherein: Among the configured sounding reference signal resources, the transmit precoding matrix indication field corresponding to the first sounding reference signal resource has the longest bit width or the largest number of precodings.

14. The device according to claim 11, wherein: For 8 ports / 4 ports / 2 ports, the number of transmit precoding matrix indication fields is different; The lengths of all transmit precoding matrix indication fields of the 8 ports are used to determine the field length of the downlink control information.

15. The device according to claim 11, wherein For 8 ports / 4 ports / 2 ports, the number of transmit precoding matrix indication fields is different; The length of the one or more transmit precoding matrix indication fields of the 8-port is consistent with the length of the transmit precoding matrix indication field of the 4-port / 2-port.

16. The device according to claim 11, wherein For 8 ports / 4 ports / 2 ports, the number of transmit precoding matrix indication fields is different; The length of one or more transmit precoding matrix indication fields of the 8-port is inconsistent with the length of the transmit precoding matrix indication field of the 4-port / 2-port; the bit width of the transmit precoding matrix indication field is determined by the maximum length of the transmit precoding matrix indication field of the 8-port / 4-port / 2-port.

17. The device according to claim 11, wherein: The number of antenna sets Ng is configured for 8 ports, and a codebook subset is configured for 4-port / 2-port transmission, wherein the length of the transmit precoding matrix indication field of the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication field of the 8-port.

18. A precoding configuration device, configured in a network device, the device comprising: A sending unit, which sends configuration information to a terminal device; Wherein, for the sounding reference signal resources in the sounding reference signal resource set of the first parameter usage set to the first value codebook, different numbers of antenna ports are configured, and at least one sounding reference signal resource is Configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and the corresponding precoding.

19. The device according to claim 18, wherein: The device also includes: A receiving unit, configured to receive capability information sent by the terminal device; The capability information includes at least one or more of the following: the number of antenna sets Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, and combination information between the number of antenna sets Ng supported and the codebook subsets.

20. A communication system comprising: Terminal equipment, capable of supporting 8Tx uplink transmission and full power mode 2; The terminal device receives configuration information from a network device; wherein, for a sounding reference signal resource in a sounding reference signal resource set whose first parameter usage is set to a first value codebook, different numbers of antenna ports are configured, and at least one sounding reference signal resource is configured as 8 ports; the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding and the 4-port / 2-port transmission of the terminal device is configured with a codebook subset, or the 8-port transmission of the terminal device is configured with the number of antenna sets Ng and corresponding precoding; A network device sends the configuration information.

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