Precoding configuration method and apparatus

Abstract

Embodiments of the present invention provide a precoding configuration method and apparatus. The method includes the step of a terminal device receiving configuration information from a network device, wherein for SRS resources in an SRS resource set where usage is set to codebook, different numbers of antenna ports are configured, with at least one SRS resource having 8 ports, for the 8-port transmission of the terminal device having an antenna group number Ng and corresponding precoder configured, and for the 4-port / 2-port transmission of the terminal device having a codebook subset configured, or for the 8-port transmission of the terminal device having an antenna group number Ng and corresponding precoder configured.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of communication technologies.

Background Art

[0002] In the 5th generation (5G) mobile communication system or the New Radio (NR) mobile communication system, before Rel-18, a terminal device (UE) can support a maximum of 4 Tx for uplink transmission. Depending on the coherence type of the terminal device, the terminal device can be classified into a non-coherent UE, a partial coherent UE, and a full coherent UE. In NR Rel-15, the concept of a codebook subset is introduced, and a corresponding codebook subset may be configured according to the coherence type of the terminal device.

[0003] On the other hand, in Rel-16, the characteristic of uplink full-power transmission that can increase the uplink transmission power of a terminal device supporting uplink MIMO is introduced. Uplink full-power transmission includes Mode 0, Mode 1, and Mode 2, and may be referred to as full-power mode 0 (ul-FullPwrMode), full-power mode 1 (ul-FullPwrMode1), and full-power mode 2 (ul-FullPwrMode2).

[0004] Note that the above description of the background art is merely for more clearly and completely explaining the configuration of the present invention and is for the understanding of those skilled in the art. These configurations should not be construed as well-known technologies to those skilled in the art just because they are described in the background art part of the present invention.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In NR Rel-18, uplink transmission from terminal devices can support 8Tx, and the concept of antenna groups was introduced. Different coherence types have different numbers of supported antenna groups (Ng). For a fully coherent UE, Ng=1. For a partially coherent UE, in one scenario the UE has 2 antenna groups and Ng=2, and in another scenario the UE has 4 antenna groups and Ng=4. For a non-coherent UE, Ng=8. Therefore, for fully coherent precoding, Ng=1. For partially coherent precoding, Ng=2 or Ng=4. For non-coherent precoding, Ng=8.

[0006] According to the inventors of this invention, for an 8Tx terminal device supporting full power mode 2, if different numbers of antenna ports are configured for SRS resources within a sounding reference signal (SRS) resource set, and at least one SRS resource is configured with 8 ports, then an Ng value must be configured for the operation of the 8 ports, and a codebook subset must be configured for the operation of the 4 ports / 2 ports. However, there is currently no clear solution as to how to configure Ng and the codebook subset, and whether or not they should be configured independently.

[0007] In view of at least one of the above-mentioned problems, the embodiment of the present invention provides a precoding configuration method and apparatus. [Means for solving the problem]

[0008] One embodiment of the present invention provides a precoding configuration method applicable to a terminal device capable of supporting 8-transmission (8Tx) uplink transmission and supporting full power mode 2, comprising the steps of: the terminal device receiving configuration information from a network device; for SRS resources in a sounding reference signal (SRS) resource set where a first parameter (usage) is set to a first value (codebook), different numbers of antenna ports are configured, with at least one SRS resource having 8 ports; for 8-port transmission of the terminal device, a number of antenna groups Ng and corresponding precoders are configured; and for 4-port / 2-port transmission of the terminal device, a subset of codebooks is configured, or for 8-port transmission of the terminal device, a number of antenna groups Ng and corresponding precoders are configured.

[0009] In another embodiment of the present invention, a precoding configuration device is provided, configured in a terminal device capable of supporting 8-transmission (8Tx) uplink transmission and supporting full power mode 2, comprising a receiving unit that receives configuration information from a network device, wherein different numbers of antenna ports are configured for SRS resources in a sounding reference signal (SRS) resource set in which a first parameter (usage) is set to a first value (codebook), with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0010] Another embodiment of the present invention provides a precoding configuration method applicable to a network device, comprising the step of the network device transmitting configuration information to a terminal device, wherein different numbers of antenna ports are configured for SRS resources in a sounding reference signal (SRS) resource set in which a first parameter (usage) is set to a first value (codebook), with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and corresponding precoders are configured, and for the 4-port / 2-port transmission of the terminal device, a subset of codebooks is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and corresponding precoders are configured.

[0011] Another embodiment of the present invention provides a precoding configuration device configured in a network device, which includes a transmitting unit that transmits configuration information to a terminal device, wherein different numbers of antenna ports are configured for SRS resources in a sounding reference signal (SRS) resource set in which a first parameter (usage) is set to a first value (codebook), with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0012] In another embodiment of the present invention, a communication system is provided comprising a terminal device and a network device, wherein the terminal device is capable of supporting 8Tx uplink transmission and supports full power mode 2, the terminal device receives configuration information from the network device, and for SRS resources in a sounding reference signal (SRS) resource set in which a first parameter (usage) is set to a first value (codebook), a different number of antenna ports are configured, with at least one SRS resource having 8 ports, for the 8-port transmission of the terminal device a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device a codebook subset is configured, or for the 8-port transmission of the terminal device a number of antenna groups Ng and a corresponding precoder are configured, and the network device transmits the configuration information.

[0013] One of the advantageous effects of the embodiments of the present invention is as follows: For an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, it is possible to clarify how to configure Ng and the codebook subset.

[0014] As shown in the following description and drawings, specific embodiments of the present invention are disclosed in detail, illustrating methods in which the principles of the present invention can be employed. However, the scope of embodiments of the present invention is not limited to these. Embodiments of the present invention include modified, altered, and equivalent forms within the scope of the gist and items of the appended claims.

[0015] Features described and / or shown in one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in other embodiments, or may replace features in other embodiments.

[0016] In the present description, the term "comprising / including" means that a feature, member, step or component exists, and does not exclude the existence or addition of one or more other features, members, steps or components.

Brief Description of the Drawings

[0017] The elementselements and features described in one drawing and one embodiment of the present invention may be combined with elements and features shown in one or more additional drawings or embodiments. Also, in the drawings, like reference numerals indicate corresponding elements in multiple drawings and may indicate corresponding elements used in one or more embodiments. [Figure 1] It is a schematic diagram of a communication system according to an embodiment of the present invention. [Figure 2] It is a schematic diagram of an example of the configuration of a codebook subset. [Figure 3] It is a schematic diagram of another example of the configuration of a codebook subset. [Figure 4] It is a schematic diagram of an example of an Ng value and a corresponding precoder. [Figure 5] It is a schematic diagram of an example of a precoding configuration method according to an embodiment of the present invention. [Figure 6] It is a schematic diagram of an example of the configuration of an Ng value and a codebook subset according to an embodiment of the present invention. [Figure 7] It is a schematic diagram of another example of the configuration of an Ng value and a codebook subset according to an embodiment of the present invention. [Figure 8] It is a schematic diagram of another example of the configuration of an Ng value and a codebook subset according to an embodiment of the present invention. <已翻译内容 [Figure 9] It is a schematic diagram of another example of the configuration of an Ng value and a codebook subset according to an embodiment of the present invention. [Figure 10] It is a schematic diagram of another example of the configuration of an Ng value and a codebook subset according to an embodiment of the present invention. [Figure 11] It is a schematic diagram of another example of the configuration of an Ng value and a codebook subset according to an embodiment of the present invention. [Figure 12] It is a schematic diagram of an example for determining the length of the TPMI field according to an embodiment of the present invention. [Figure 13] It is a schematic diagram of another example for determining the length of the TPMI field according to an embodiment of the present invention. [Figure 14] It is a schematic diagram of another example for determining the length of the TPMI field according to an embodiment of the present invention. [Figure 15] It is a schematic diagram of another example of a pre-coding configuration method according to an embodiment of the present invention. [Figure 16] It is a schematic diagram of an example of a pre-coding configuration device according to an embodiment of the present invention. [Figure 17] It is a schematic diagram of another example of a pre-coding configuration device according to an embodiment of the present invention. [Figure 18] It is a schematic diagram of an example of a network device according to an embodiment of the present invention. [Figure 19] It is a schematic diagram of an example of a terminal device according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0018] The above and other features of the present invention will become clear from the following description. In the specification and drawings, specific embodiments of the present invention are disclosed in detail, and some embodiments in which the principles of the present invention can be adopted are shown. Note that the present invention is not limited to the described embodiments. The present invention includes all modified, deformed, and equivalent ones within the scope of the appended claims. The following will describe each embodiment of the present invention with reference to the drawings. These embodiments are merely exemplary and do not limit the present invention.

[0019] In embodiments of the present invention, terms such as "first," "second," etc., are used in titles to distinguish different elements, but do not represent a spatial arrangement or temporal order of these elements, and these elements are not limited to these terms. The term "and / or" includes any one or more of the terms listed in the relevant list and all combinations thereof. The terms "include," "comprehensible," "have," etc., mean the presence of the listed features, elements, components, or components, but do not exclude the presence or addition of one or more other features, elements, components, or components.

[0020] In the embodiments of the present invention, singular nouns such as "one" and "the" should be understood broadly as "one type" or "one category," including plural forms, and not limited to "one." Furthermore, the term "the foregoing" should be understood to include both singular and plural forms unless the context explicitly indicates otherwise. Also, unless the context explicitly indicates otherwise, the term "as described" should be understood as "at least partially described," and the term "based on" should be understood as "based on at least partially."

[0021] In embodiments of the present invention, the terms "communication network" or "wireless communication network" may mean a network conforming to any communication standard such as Long Term Evolution (LTE), Advanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA®), or High-Speed ​​Packet Access (HSPA).

[0022] Furthermore, communication between devices in a communication system may be carried out according to any stage of communication protocol, which may include, but is not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G, New Radio (NR), future 6G, and / or other currently known communication protocols or other communication protocols to be developed in the future.

[0023] In embodiments of the present invention, the term "network device" means, for example, a device within a communication system that allows a terminal device to access the communication system and provides services to said terminal device. A network device may include, but is not limited to, a 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.

[0024] Here, a base station may include, but is not limited to, a node B (NodeB or NB), an evolutionary node B (eNodeB or eNB), a 5G base station (gNB), an IAB donor, as well as a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (e.g., femto, pico). The term “base station” may also include some or all of their functions, and each base station may provide communication coverage to a specific geographic area. The term “cell” may mean a base station and / or its coverage area, depending on the context in which the term is used.

[0025] In embodiments of the present invention, the terms "User Equipment" (UE) or "Terminal Equipment" (TE) refer to equipment that accesses a communication network and receives network services, for example, via a network device. Terminal equipment may be fixed or mobile and may be referred to as a mobile station (MS), terminal, subscriber station (SS), access terminal (AT), station, etc.

[0026] Here, terminal devices may include, but are not limited to, mobile phones (cellular phones), personal digital assistants (PDAs), radio modulators / demodulators, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smartwatches, digital cameras, and the like.

[0027] Furthermore, in scenarios such as the Internet of Things (IoT), the user device may be a monitoring or measurement device or apparatus, and may include, but is not limited to, machine-type communication (MTC) terminals, in-vehicle communication terminals, industrial wireless devices, surveillance cameras, device-to-device (D2D) terminals, and machine-to-machine (M2M) terminals.

[0028] Furthermore, the terms “Network side” or “Network device side” mean the side of the network, which may be a base station or include one or more of the above-mentioned network devices. The terms “User side” or “Terminal side” or “Terminal device side” mean the side of the user or terminal, which may be a UE or include one or more of the above-mentioned terminal devices. In this specification, unless otherwise specified, “device” may mean network device or terminal device.

[0029] The following describes a scenario of an embodiment of the present invention with reference to an example, but the present invention is not limited thereto.

[0030] Figure 1 is a schematic diagram of a communication system according to an embodiment of the present invention, schematically showing examples of terminal devices and network devices. As shown in Figure 1, the communication system 100 may include a network device 101 and terminal devices 102 and 103. For the sake of explanation, Figure 1 is described using two terminal devices and one network device as an example, but embodiments of the present invention are not limited thereto.

[0031] In embodiments of the present invention, existing services or services that can be implemented in the future can be provided between the network device 101 and the terminal devices 102 and 103. For example, these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra-reliable and low-latency communication (URLLC), and related communications for terminal devices with reduced capabilities.

[0032] Although Figure 1 shows that both terminal devices 102 and 103 are located within the coverage area of ​​network device 101, the present invention is not limited to this. Neither of the two terminal devices 102 and 103 are located within the coverage area of ​​network device 101, or one terminal device 102 may be located within the coverage area of ​​network device 101 and the other terminal device 103 may be located outside the coverage area of ​​network device 101.

[0033] NR Rel-15 introduces the concept of codebook subsets, which may be configured according to the coherence type of the terminal device. Codebook subsets include fullyAndPartialAndNonCoherent, partialAndNonCoherent, and nonCoherent. The present invention is not limited thereto, and other names may be used, for example. Different codebook subsets contain different precoder types.

[0034] Figure 2 is a schematic diagram of an example of a codebook subset configuration, schematically showing the case of a codebook subset configuration for four antenna ports. Figure 3 is a schematic diagram of another example of a codebook subset configuration, schematically showing the case of a codebook subset configuration for two antenna ports.

[0035] As shown in Figures 2 and 3, the network network device (gNB) can configure different precoders depending on the type of terminal device. For example, in the case of a fully coherent UE, the gNB can configure a fully coherent precoder, a partially coherent precoder, and a non-coherent precoder. In the case of a partially coherent UE, the gNB can configure a partially coherent precoder and a non-coherent precoder. In the case of a non-coherent UE, the gNB can configure only a non-coherent precoder.

[0036] NR Rel-16 introduces full-power operating modes, including Full Power Mode 0 (corresponding to UE capability ul-FullPwrMode, with RRC parameter ul-FullPowerTransmission set to fullpower), Full Power Mode 1 (corresponding to UE capability ul-FullPwrMode1, with RRC parameter ul-FullPowerTransmission set to fullpowerMode1), and Full Power Mode 2 (corresponding to UE capability ul-FullPwrMode2-MaxSRS-ResInSet, with RRC parameter ul-FullPowerTransmission set to fullpowerMode2).

[0037] For full power mode 2, the SRS resources in an SRS resource set where the usage parameter is set to 'codebook' may consist of the same number of antenna ports or different numbers of antenna ports. For example, SRS resources of {1-port, 2-ports, 4-ports} may be configured for a UE. In NR Rel-16, full power mode 2 is available for fully coherent UEs, partially coherent UEs, and non-coherent UEs.

[0038] In NR Rel-15, the 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 instruction field for the Transmission Precoding Matrix Indicator (TPMI) in the downlink control information (DCI). In NR Rel-15, the maximum value of maxRank is 4.

[0039] The concept of antenna groups was introduced in NR Rel-18. The number of antenna groups (Ng) that a terminal device supports depends on the capabilities of the terminal device. For example, depending on the supported Ng values ​​reported by the UE, the gNB can configure a precoder for the UE corresponding to one Ng value.

[0040] Figure 4 is a schematic diagram of an example of an Ng value and its corresponding precoder, showing the correspondence between Ng values ​​and different types of precoders. NR Rel-18 can support up to 8 layers of push transmission, and accordingly, the maximum value of maxRank is also extended to 8.

[0041] According to the inventors' findings, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for SRS resources within an SRS resource set, and at least one SRS resource is configured with 8 ports, then an Ng value must be configured for 8-port operation, and a codebook subset must be configured for 4-port / 2-port operation. However, it needs to be clearly defined whether the Ng value and the codebook subset can be configured independently of each other.

[0042] Furthermore, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, a misunderstanding may occur when a 4-port SRS resource is indicated, provided that the parameter maxRank is configured to be greater than 4 (e.g., 8). This is because the maximum value of maxRank for 4 ports is 4.

[0043] In NR Rel-16 / Rel-17, for UEs supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, the length of the Precoding information and number of layers field (which may be abbreviated as the TPMI field) in the DCI is determined by the definition in Table 1 of TS38.212 (Section 7.3.1.1.2, Section 7.3.1.1.3).

[0044] [Table 1] This indicates that the length of the TPMI field in DCI depends on the maximum number of antenna ports of the SRS resource.

[0045] However, in Rel-18, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, the TPMI field may be as long as 4 ports, depending on the Ng value and the configuration of the codebook subset. In this case, the scheme defined in Table 1 will not work.

[0046] The above has provided a general overview of the embodiments of the present invention and some of the problems discovered by the inventors. The embodiments of the present invention will now be described in more detail.

[0047] In embodiments of the present invention, the upper-layer signaling may be, for example, a radio resource control (RRC) signaling. The RRC signaling includes, for example, an RRC message, and includes, for example, a master information block (MIB), system information, a dedicated RRC message, or an RRC IE (RRC information element). The upper-layer signaling may also be, for example, a MAC (Medium Access Control) signaling, or may be referred to as a MAC CE (MAC control element). However, the present invention is not limited to these.

[0048] In the following explanation, the terms “PDCCH” and “physical downlink control channel” or “downlink control information” may be interchangeable, as long as no confusion arises, and the terms “PDSCH” and “physical downlink data channel” or “downlink data” may also be interchangeable. Furthermore, transmitting or receiving a PDCCH may be understood as transmitting or receiving downlink control information carried by the PDCCH. Transmitting or receiving a PDSCH may be understood as transmitting or receiving downlink data carried by the PDSCH.

[0049] <Example 1> Embodiments of the present invention provide a precoding configuration method that can support 8-transmission (8Tx) uplink transmission and is described from the perspective of a terminal device that supports full power mode 2. Figure 5 is a schematic diagram of an example of a precoding configuration method according to an embodiment of the present invention. As shown in Figure 5, the method includes the following steps.

[0050] Step 502: The terminal device receives configuration information from the network device.

[0051] Here, for SRS resources in a sounding reference signal (SRS) resource set where the first parameter (usage) is set to the first value (codebook), different numbers of antenna ports are configured, with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0052] Figure 5 above merely provides a schematic representation of an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between various steps may be appropriately adjusted, or several other steps may be added, or several steps may be removed. Those skilled in the art can make appropriate modifications based on the above description and are not limited to the description in Figure 5.

[0053] In some embodiments, for the 8-port transmission of the terminal device, an antenna group number Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured.

[0054] For example, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, then both the Ng value and the codebook subset should be configured for the UE. The precoder corresponding to the Ng value is applied to 8-port push transmissions, and the precoder corresponding to the codebook subset is applied to push transmissions with fewer than 8 ports (4-ports / 2-ports).

[0055] In embodiments of the present invention, gNB constitutes an Ng value and also constitutes a codebook (or precoder) corresponding to the Ng value. The terms "constitutes Ng," "constitutes a value of Ng," "constitutes a precoder corresponding to the Ng value," and "constitutes Ng and the corresponding precoder" are equivalent or interchangeable.

[0056] In some embodiments, for a fully coherent terminal device, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports in an 8-port precoder that the terminal device can support.

[0057] For example, for an 8Tx UE that is fully coherent and supports full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, then the Ng values ​​and codebook subset configurations are independent of each other. The number of precoded in-phase ports in a 4-ports / 2-ports codebook subset must not exceed the maximum number of in-phase ports in an 8-port precoder that the UE can support.

[0058] Figure 6 is a schematic diagram of an example of the configuration of the Ng value and codebook subset according to an embodiment of the present invention, showing the case where the Ng value and codebook subset are configured independently 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 Ng value may be configured as any of {Ng=1, 2, 4, 8}. For 4-ports, the codebook subset may be configured as any of {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}.

[0059] In another example, for a fully coherent UE, the number of ports in the SRS resources may be configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8 ports, the value of Ng may be configured as {Ng=1, 2, 4, 8}. For 2 ports, the codebook subset may be configured as {fullyAndPartialAndNonCoherent, nonCoherent}.

[0060] In another example, for a fully coherent UE, the number of ports for SRS resources may be configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng may be configured as {Ng=1, 2, 4, 8}. For 4-ports / 2-ports, the codebook subset may be configured as {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}. If the codebook subset is configured as partialAndNonCoherent, then when a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0061] In another example, for an 8Tx UE that is fully coherent and supports full power mode 2, the Ng values ​​for the supported 8 ports, the supported codebook subsets for 4 ports / 2 ports, and the combinations of supported Ng values ​​and codebook subsets may depend on the capabilities of the UE. The gNB configures the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE. For example, the combination of Ng values ​​and codebook subsets may be those of the example described above in the embodiments of the present invention.

[0062] 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 groups Ng. The number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0063] For example, for an 8Tx UE that is fully coherent and supports full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, the configuration of the codebook subset depends on the configured Ng value. For example, the number of 4-ports / 2-ports precoded in-phase ports must not exceed the maximum number of 8-ports precoded in-phase ports corresponding to the configured Ng value. Alternatively, the number of 4-ports / 2-ports precoded in-phase ports must not exceed the maximum number of 8-ports precoded in-phase ports that the UE can support.

[0064] Figure 7 is a schematic diagram of another example of the configuration of Ng value and codebook subset according to an embodiment of the present invention, showing the case of the relationship configuration between Ng value and 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 Ng value may be configured as {Ng=1, 2, 4, 8}. When Ng is configured as 1, for 4-ports, the codebook subset may be configured as fullyAndPartialAndNonCoherent, or the codebook subset for 4-ports may be configured as {fullyAndPartialAndNonCoherent,partialAndNonCoherent,nonCoherent}. When Ng=2 or Ng=4, the codebook subset for 4 ports may be configured as partialAndNonCoherent, or the codebook subset for 4 ports may be configured as either {partialAndNonCoherent,nonCoherent}. When Ng=8, the codebook subset for 4 ports may be configured as nonCoherent.

[0065] In another example, for a fully coherent UE, the number of ports in the SRS resources may be configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the value of Ng may be configured as {Ng=1, 2, 4, 8}. If Ng is configured as 1, for 2-ports, the codebook subset may be configured as fullyAndPartialAndNonCoherent, or the codebook subset for 2-ports may be configured as {fullyAndPartialAndNonCoherent,nonCoherent}. If Ng is configured as 2 or Ng=4, for 2-ports, the codebook subset may be configured as nonCoherent. If Ng is configured as 8, for 2-ports, the codebook subset may be configured as nonCoherent.

[0066] In another example, for a fully coherent UE, the number of ports in the SRS resources may be configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8 ports, the value of Ng may be configured as {Ng=1, 2, 4, 8}. If Ng=1, for 4-ports / 2-ports, the codebook subset may be configured as fullyAndPartialAndNonCoherent, or as {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}. If Ng=2 or Ng=4, for 4-ports / 2-ports, the codebook subset may be configured as partialAndNonCoherent, or as {partialAndNonCoherent, nonCoherent}. When configured as Ng=8, the codebook subset may be configured as nonCoherent for 4 ports. When the codebook subset is configured as partialAndNonCoherent, it is considered nonCoherent when a 2-port SRS resource is indicated.

[0067] In another example, for an 8Tx UE that is fully coherent and supports full power mode 2, the Ng values ​​for the supported 8 ports, the codebook subsets for the supported 4 ports / 2 ports, and the combinations of supported Ng values ​​and codebook subsets may depend on the capabilities of the UE. gNB configures the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE. For example, the combination of Ng values ​​and codebook subsets may be those of the example described above in the embodiment of the present invention.

[0068] In some embodiments, for a partially coherent terminal device having two antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0069] For example, for an 8Tx UE that is partially coherent with two antenna groups and supports full power mode 2, if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, then the Ng value and the configuration of the codebook subset are independent of each other. The number of precoded in-phase ports in a 4-ports / 2-ports codebook subset must not exceed the maximum number of in-phase ports in an 8-port precoder that the UE can support.

[0070] Figure 8 is a schematic diagram of another example of the configuration of the Ng value and codebook subset according to an embodiment of the present invention, showing the case where the Ng value and codebook subset are configured independently for a partially coherent terminal device having two antenna groups. In one example, for a partial UE having two antenna groups, 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 Ng value may be configured as {Ng=2, 4, 8}. For 4 ports, the codebook subset may be configured as {partialAndNonCoherent, nonCoherent}. Alternatively, for 4 ports, the codebook subset may be configured as {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}.

[0071] In another example, for a partial UE having two antenna groups, the number of ports for SRS resources can be configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the Ng value may be configured as {Ng=2, 4, 8}. For 2-ports, the codebook subset can be configured as nonCoherent. Alternatively, for 2-ports, the codebook subset may be configured as {fullyAndPartialAndNonCoherent, nonCoherent}.

[0072] In another example, for a partial UE with two antenna groups, the number of ports for SRS resources may be configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the Ng value may be configured as {Ng=2, 4, 8}. For 4-ports / 2-ports, the codebook subset may be configured as {partialAndNonCoherent, nonCoherent}. If the codebook subset is configured as partialAndNonCoherent, and a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent. Alternatively, for 4-ports / 2-ports, the codebook subset may be configured as {fullyAndPartialAndNonCoherent, partialAndNonCoherent, nonCoherent}. If a codebook subset is configured as partialAndNonCoherent, then when a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0073] In another example, for an 8Tx UE that is partially coherent with two antenna groups and supports full power mode 2, the supported Ng values ​​for 8 ports, the supported codebook subsets for 4 ports / 2 ports, and the combinations of supported Ng values ​​and codebook subsets may depend on the capabilities of the UE. The gNB configures the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE. For example, the combination of Ng values ​​and codebook subsets may be those of the example described above in the embodiment of the present invention.

[0074] In some embodiments, for a partially coherent terminal device having two antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0075] For example, for an 8Tx UE that is partially coherent with two antenna groups and supports full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, the configuration of the codebook subset depends on the configured Ng value. For example, the number of 4-ports / 2-ports precoded in-phase ports must not exceed the number of 8-ports precoded in-phase ports corresponding to the configured Ng value. Alternatively, the number of 4-ports / 2-ports precoded in-phase ports must not exceed the maximum number of 8-ports precoded in-phase ports that the UE can support.

[0076] Figure 9 is a schematic diagram of another example of the configuration of the Ng value and codebook subset according to an embodiment of the present invention, showing a case where the Ng value and codebook subset are associated and configured for a partially coherent terminal device having two antenna groups. In one example, for a partial UE having two antenna groups, 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 Ng value may be configured as {Ng=2, 4, 8}. If Ng=2 or Ng=4, the codebook subset for 4 ports may be configured as partialAndNonCoherent. If Ng=8, the codebook subset for 4 ports may be configured as nonCoherent. Alternatively, if Ng=2, the codebook subset for 4 ports may be configured as fullyAndPartialAndNonCoherent. If Ng=4, the codebook subset may be configured as partialAndNonCoherent for 4 ports. If Ng=8, the codebook subset may be configured as nonCoherent for 4 ports.

[0077] In another example, for a partial UE having two antenna groups, the number of ports for SRS resources is configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8-ports, the value of Ng may be configured as {Ng=2, 4, 8}. If Ng=2 or Ng=4, the codebook subset for 2-ports may be configured as nonCoherent. If Ng=8, the codebook subset for 2-ports may be configured as nonCoherent. If Ng=2 or Ng=4, the codebook subset for 2-ports may be configured as fullyAndPartialAndNonCoherent. If Ng=8, the codebook subset for 2-ports may be configured as nonCoherent.

[0078] In another example, for a partial UE with two antenna groups, the number of ports for SRS resources can be configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng may be configured as {Ng=2, 4, 8}. If Ng=2 or Ng=4, the codebook subset may be configured as partialAndNonCoherent for 4-ports / 2-ports. If Ng=8, the codebook subset may be configured as nonCoherent for 4-ports / 2-ports. When the codebook subset is configured as partialAndNonCoherent, the codebook subset is considered nonCoherent when a 2-port SRS resource is indicated. Alternatively, if Ng=2, the codebook subset may be configured fullyAndPartialAndNonCoherent for 4-ports / 2-ports; if Ng=4, the codebook subset may be configured partiallyAndNonCoherent for 4-ports / 2-ports; and if Ng=8, the codebook subset may be configured nonCoherent for 4-ports / 2-ports. When the codebook subset is configured partiallyAndNonCoherent, the codebook subset is considered nonCoherent when a 2-port SRS resource is shown.

[0079] In another example, for an 8Tx UE that is partially coherent with two antenna groups and supports full power mode 2, the supported Ng values ​​for 8 ports and the supported codebook subsets for 4 ports / 2 ports, as well as the combinations of supported Ng values ​​and codebook subsets, may depend on the capabilities of the UE. The gNB configures the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE. For example, the combination of Ng values ​​and codebook subsets may be those of the example described above in the embodiment of the present invention.

[0080] In some embodiments, for a partially coherent terminal device having four antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0081] For example, for an 8Tx UE that is partially coherent with four antenna groups and supports full power mode 2, if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, then the Ng values ​​and the configuration of the codebook subsets are independent of each other. The number of precoded in-phase ports in the 4-ports / 2-ports codebook subset must not exceed the maximum number of in-phase ports in an 8-port precoder that the UE can support.

[0082] Figure 10 is a schematic diagram of another example of the configuration of the Ng value and codebook subset according to an embodiment of the present invention, showing the case where the Ng value and codebook subset are configured independently for a partially coherent terminal device having four antenna groups. In one example, for a partial UE having four antenna groups, 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 Ng value may be configured as either {Ng=4,8}. For 4-ports, the codebook subset may be configured as either {partialAndNonCoherent,nonCoherent}.

[0083] In another example, for a partial UE with four antenna groups, the number of ports in the SRS resources can be configured as {8-ports, 2-ports} or {8-ports, 2-ports, 1-port}. For 8 ports, the value of Ng may be configured as either {Ng=4, 8}. For 2 ports, the codebook subset can be configured as nonCoherent. Alternatively, for 2 ports, the codebook subset may be configured as either {fullyAndPartialAndNonCoherent, nonCoherent}.

[0084] In another example, for a partial UE with four antenna groups, the number of ports for SRS resources can be configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng may be configured as either {Ng=4,8}. For 4-ports / 2-ports, the codebook subset may be configured as either {partialAndNonCoherent,nonCoherent}. If the codebook subset is configured as partialAndNonCoherent, then when a 2-port SRS resource is indicated, the codebook subset is considered nonCoherent.

[0085] In another example, for an 8Tx UE that is partially coherent with four antenna groups and supports full power mode 2, the supported Ng values ​​for 8 ports, the supported codebook subsets for 4 ports / 2 ports, and the combinations of supported Ng values ​​and codebook subsets may depend on the capabilities of the UE. The gNB configures the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE. For example, the combination of Ng values ​​and codebook subsets may be those of the example described above in the embodiment of the present invention.

[0086] In some embodiments, for a partially coherent terminal device having four antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0087] For example, for an 8Tx UE that is partially coherent with four antenna groups and supports full power mode 2, if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, the configuration of the codebook subset depends on the configured Ng value. For example, the number of 4-ports / 2-ports precoded in-phase ports must not exceed the number of 8-ports precoded in-phase ports corresponding to the configured Ng value. Alternatively, the number of 4-ports / 2-ports precoded in-phase ports must not exceed the maximum number of in-phase ports for an 8-port precoder that the UE can support.

[0088] Figure 11 is a schematic diagram of another example of the configuration of Ng value and codebook subset according to an embodiment of the present invention, showing the associated configuration of Ng value and codebook subset for a partially coherent terminal device having four antenna groups. In one example, for a partial UE having four antenna groups, 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 may be configured as either {Ng=4, 8}. When Ng is configured as 4, the codebook subset for 4 ports can be configured as partialAndNonCoherent. When Ng is configured as 8, the codebook subset for 4 ports can be configured as nonCoherent. Alternatively, when Ng is configured as 4 or Ng=8, the codebook subset for 4 ports can be configured as nonCoherent.

[0089] In another example, for a partial UE with four antenna groups, the number of ports in the SRS resources can be 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 may be configured as either {Ng=4, 8}. When Ng is configured as 4 or 8, the codebook subset for 2 ports can be configured as nonCoherent. Alternatively, when Ng is configured as 4, the codebook subset for 4 ports can be configured as fullyAndPartialAndNonCoherent. When Ng is configured as 8, the codebook subset for 4 ports can be configured as nonCoherent.

[0090] In another example, for a partial UE with four antenna groups, the number of ports for SRS resources can be configured as {8-ports, 4-ports, 2-ports} or {8-ports, 4-ports, 2-ports, 1-port}. For 8-ports, the value of Ng may be configured as either {Ng=4, 8}. If Ng is configured as 4, the codebook subset can be configured as partialAndNonCoherent or nonCoherent for 4-ports / 2-ports. If Ng is configured as 8, the codebook subset can be configured as nonCoherent for 4-ports. When the codebook subset is configured as partialAndNonCoherent, the codebook subset is considered nonCoherent when a 2-port SRS resource is indicated.

[0091] In another example, for an 8Tx UE that is partially coherent with four antenna groups and supports full power mode 2, the supported Ng values ​​for 8 ports and the supported codebook subsets for 4 ports / 2 ports, as well as the combinations of supported Ng values ​​and codebook subsets, may depend on the capabilities of the UE. The gNB configures the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE. For example, the combination of Ng values ​​and codebook subsets may be those of the example described above in the embodiment of the present invention.

[0092] In some embodiments, for a non-coherent terminal device, the number of antenna groups Ng is configured to be Ng=8, and the 4-port / 2-port codebook subset of the terminal device is configured to be noncoherent.

[0093] For example, for an 8Tx UE that is non-coherent and supports full power mode 2, if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 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 nonCoherent.

[0094] While the configurations according to the coherence type have been described in general terms, the present invention is not limited thereto.

[0095] In some embodiments, the method further includes the following steps, as shown in Figure 5.

[0096] Step 501: The terminal device reports capability information to the network device.

[0097] Here, the capability information includes at least one or more of the following: the number of antenna groups Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, or information on combinations of the number of supported antenna groups Ng and the codebook subsets.

[0098] In some embodiments, the network device configures the number of antenna groups Ng and / or a subset of codebooks for the terminal device based on the capability information.

[0099] For example, for an 8Tx UE supporting full power mode 2 (including fully coherent UEs, partially coherent UEs, and non-coherent UEs), if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, the UE may report the supported Ng values ​​for the 8 ports, the supported codebook subsets for the 4-ports / 2-ports, and the combinations of supported Ng values ​​and codebook subsets (combination information may be seen, for example, in Figures 6 to 11). The gNB may configure the corresponding Ng values ​​and codebook subsets based on the capabilities of the UE.

[0100] Table 2 shows an example of modifications corresponding to TS 38.214 (this example may be added to Section 6.1.1.1 of TS 38.214, but the present invention is not limited thereto).

[0101] [Table 2] In some embodiments, the number of antenna groups Ng and the corresponding precoder are configured for 8-port transmission of the terminal device. The codebook subset or precoder for 4-port / 2-port transmission of the terminal device is obtained based on predefined information and / or the configured number of antenna groups Ng.

[0102] For example, for an 8Tx UE (including fully coherent, partially coherent, and non-coherent UEs) supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, then gNB will configure only the Ng value for the UE.

[0103] For example, the 4-ports / 2-ports codebook subsets may be obtained from configured Ng values ​​based on a predefined mapping. For instance, 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.

[0104] In another example, the configured Ng value may apply to 4-ports / 2-ports. For example, if Ng=1 is configured, only fully coherent precoders for 4-ports / 2-ports are configured. If Ng=2 or Ng=4 is configured, only partially coherent precoders for 4-ports or only fully coherent precoders for 2-ports are configured. If Ng=8 is configured, only non-coherent precoders for 4-ports / 2-ports are configured.

[0105] According to this embodiment, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, it is possible to clarify how to configure the Ng value for 8 ports and how to configure the codebook subsets for 4 ports / 2 ports.

[0106] The following describes how to set maxRank. This information may be used in combination with the above example, or it may be implemented independently.

[0107] In some embodiments, if the second parameter (maxRank) is configured to be greater than 4 and 4 SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 4, and if the second parameter (maxRank) is configured to be greater than 4 and 2 SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 2.

[0108] For example, for an 8Tx UE supporting full power mode 2 (including a fully coherent UE, a partially coherent UE with two antenna groups, a partially coherent UE with four antenna groups, and a non-coherent UE), if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports, and the parameter maxRank is configured to be greater than 4, then when a 4-port SRS resource is indicated, maxRank is considered to be 4, and when a 2-port Tx UE is indicated, SRS resource set is considered to be 2.

[0109] Table 3 shows an example of a modification corresponding to TS 38.212 (this example may be added to Sections 7.3.1.1.2 and 7.3.1.1.3 of TS 38.212, but the present invention is not limited thereto).

[0110] [Table 3] Table 4 shows an example of another modification corresponding to TS 38.212 (this example may apply to Sections 7.3.1.1.2 and 7.3.1.1.3 of TS 38.212, but the present invention is not limited thereto).

[0111] [Table 4] According to this embodiment, for an 8Tx UE supporting full power mode 2, the maxRank setting can be clearly defined if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports.

[0112] The following further describes the TPMI field in DCI, which may be combined with the above embodiments or performed independently. Furthermore, while the present invention describes the TPMI field as an example, it is not limited thereto, and for example, the TPMI field may be referred to by other names or replaced by other fields.

[0113] In some embodiments, the precoder used for the uplink transmission is indicated by one or more Transmit Precoding Matrix Indicators (TPMI) fields in the Downlink Control Information (DCI).

[0114] For example, with respect to an 8Tx UE supporting full power mode 2 (including a fully coherent UE, a partially coherent UE with two antenna groups, a partially coherent UE with four antenna groups, and a non-coherent UE), if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, the length of the field for TPMI indication in DCI (TPMI field) may be predetermined.

[0115] In some embodiments, the number of Transmit Precoding Matrix Indicator (TPMI) fields is the same for 8-port / 4-port / 2-port configurations, and the length of the Transmit Precoding Matrix Indicator (TPMI) field is determined by the bit width or the number of precoders of the TPMI field corresponding to the first SRS resource. For example, in a configured SRS resource, the first SRS resource corresponds to the TPMI field with the longest bit width or the most precoders.

[0116] For example, the number of TPMI fields is the same for 8-ports, 4-ports, and 2-ports configurations. In this case, the length of the TPMI field is determined by the bit width or the number of precoders of the TPMI corresponding to the SRS resource. Of the configured SRS resources, this SRS resource corresponds to the TPMI with the longest bit width or the most precoders.

[0117] In one example, an SRS resource set consists of K SRS resources. For SRS resource i, the corresponding TPMI bit width is L i (i=1,…K). In this case, the length of the final TPMI field may be determined as follows:

[0118] L=max{L1,L2,…,L K} For SRS resources, the corresponding TPMI bit width is max{L1,L2,…,L K If it is less than}, some of the most significant bits (MSBs), which are all zero, are inserted into the TPMI field.

[0119] Figure 12 is a schematic diagram of an example of determining the length of a TPMI field according to an embodiment of the present invention. As shown in Figure 12, for example, three SRS resources are configured, the first SRS resource being 2-ports and having a TPMI bit width of 3 bits, the second SRS resource being 4-ports and having a TPMI bit width of 5 bits, and the third SRS resource being 8-ports and having a TPMI bit width of 3 bits. Therefore, the final length of the TPMI field is 5 bits. When the first or third SRS resource is shown (i.e., 2 ports or 8 ports are shown), the first two bits of the TPMI field are all set to 0, i.e., the two most significant bits (MSB) are set to 0.

[0120] Table 5 shows an example of a modification corresponding to TS 38.212 (this example may apply to Sections 7.3.1.1.2 and 7.3.1.1.3 of TS 38.212, but the present invention is not limited thereto).

[0121] [Table 5] In another example, an SRS resource set contains K SRS resources. For SRS resource i, the number of corresponding precoders is N. i (i=1,…K). In this case, the length of the TPMI field may be determined as follows:

[0122]

number

[0123] Table 6 shows an example of a modification corresponding to TS 38.212 (this example may apply to Sections 7.3.1.1.2 and 7.3.1.1.3 of TS 38.212, but the present invention is not limited thereto).

[0124] [Table 6] In some embodiments, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs for 8-port / 4-port / 2-port configurations. For example, there are two TPMI fields for 8-ports and one TPMI field for 4-ports / 2-ports configurations. The length of all Transmit Precoding Matrix Indicator (TPMI) fields for the 8-port configuration is used to determine the field length of the DCI.

[0125] Figure 13 is a schematic diagram of another example of determining the length of the TPMI field according to an embodiment of the present invention. As shown in Figure 13, for example, two SRS resources are configured, the first SRS resource having 4 ports and a corresponding TPMI bit width of X bits, and the second SRS resource having 8 ports and a corresponding TPMI bit width of 2Y bits, Y <X<2Yである。

[0126] As shown in Figure 13, the length of the 8-port TPMI field is used to determine the DCI field length. The DCI consists of TPMI#1 (Y bits) and TPMI#2 (Y bits). When 4-ports are indicated, the X bits of TPMI#1 and TPMI#2 are used for the 4-port TPMI indication, and the (2Y-X) bit of the MSB is set to 0. When 8-ports are indicated, TPMI#1 and TPMI#2 are used for the 8-port TPMI indication.

[0127] In some embodiments, the number of transmit precoding matrix indicator (TPMI) fields differs for 8-port / 4-port / 2-port configurations, and the length of one or more transmit precoding matrix indicator (TPMI) fields for the 8-port configuration matches the length of the transmit precoding matrix indicator (TPMI) fields for the 4-port / 2-port configurations.

[0128] For example, one TPMI field (or several TPMI fields) in an 8-ports configuration, for instance, the first TPMI field, must have a length that matches that of a 4-ports / 2-ports configuration.

[0129] In some embodiments, the number of Transmit Precoding Matrix Indicators (TPMI) fields differs for 8-port / 4-port / 2-port systems, the length of one or more Transmit Precoding Matrix Indicators (TPMI) fields for the 8-port system does not match the length of the Transmit Precoding Matrix Indicators (TPMI) fields for the 4-port / 2-port system, and the bit width of the Transmit Precoding Matrix Indicators (TPMI) field is determined by the maximum length of the Transmit Precoding Matrix Indicators (TPMI) field for the 8-port / 4-port / 2-port system.

[0130] For example, if a TPMI field (or several TPMI fields) for 8-ports does not have the same length as the 4-ports / 2-ports TPMI, the final bit width of the TPMI field depends on the longest length of the TPMI corresponding to the 8-ports / 4-ports / 2-ports. If the length of the TPMI corresponding to the SRS resource is less than the longest length of the TPMI, some of the most significant bits, which are all zero, are inserted into the TPMI field.

[0131] Figure 14 is a schematic diagram of another example of determining the length of the TPMI field according to an embodiment of the present invention. As shown in Figure 14, for example, two SRS resources are configured, the first SRS resource having 4 ports and a corresponding TPMI bit width of X bits, and the second SRS resource having 8 ports and a corresponding TPMI bit width of 2Y bits, Y <X<2Yである。

[0132] As shown in Figure 14, the length of the first TPMI field of the 8-port is used to determine the DCI field length. TPMI#1 (X bits) and TPMI#2 (Y bits) are present in the DCI. If 4-ports are indicated, TPMI#1 is used for indicating the 4-port TPMI, and TPMI#2 is ignored. If 8-ports are indicated, TPMI#1 and TPMI#2 are used for indicating the 8-port TPMI, and in TPMI#1, the (XY) bits of the MSB are set to 0.

[0133] In some embodiments, the number of antenna groups Ng is configured for 8 ports, and the codebook subset is configured for 4-port / 2-port transmission, where the length of the transmit precoding matrix indication (TPMI) field for the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field for the 8 ports.

[0134] For example, with respect to an 8Tx UE supporting full power mode 2 (including a fully coherent UE, a partially coherent UE with two antenna groups, a partially coherent UE with four antenna groups, and a non-coherent UE), if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, then when configuring the Ng value for the UE's 8-port transmission and configuring the codebook subset for the UE's 4-ports / 2-port transmission, it is necessary to ensure that the length of the TPMI field for 4-ports / 2-ports is less than or equal to the length of the TPMI field for 8 ports.

[0135] According to this embodiment, for an 8Tx UE supporting full power mode 2, the length of the TPMI field can be determined if different numbers of antenna ports are configured for the SRS resources within the SRS resource set, and at least one SRS resource is configured with 8 ports.

[0136] Tables 1 to 6 above are merely for the purpose of schematically illustrating embodiments of the present invention, and the present invention is not limited thereto. Furthermore, some parameters or terms in the tables may refer to related technologies, and redundant explanations are omitted here. Full power mode 2 in embodiments of the present invention may also be referred to as Mode 2, or other names may be used, for example. For specific details, refer to ul-FullPwrMode2 in related technologies, but the present invention is not limited thereto, and all modes having the same or similar functionality as ul-FullPwrMode2 in Rel-16 are within the scope of the present invention.

[0137] The above embodiments illustrate examples of the present invention, and the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, each of the above embodiments may be used individually, or one or more of the above embodiments may be used in combination.

[0138] According to this embodiment, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, it is possible to clarify how to configure Ng and the codebook subset.

[0139] <Example 2> Embodiments of the present invention provide a precoding configuration method and will be described from the network device side. Embodiment 2 may be combined with Embodiment 1, and the description of the same contents as Embodiment 1 will be omitted.

[0140] Figure 15 is a schematic diagram of another example of a precoding configuration method according to an embodiment of the present invention. As shown in Figure 15, the method includes the following steps.

[0141] Step 1502: The network device transmits configuration information to the terminal device.

[0142] Here, for SRS resources in a sounding reference signal (SRS) resource set where the first parameter (usage) is set to the first value (codebook), different numbers of antenna ports are configured, with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0143] In some embodiments, the method may further include the following steps, as shown in Figure 15.

[0144] Step 1501: The network device receives capability information transmitted by the terminal device.

[0145] Here, the capability information includes at least one or more of the following: the number of antenna groups Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, or information on combinations of the number of supported antenna groups Ng and the codebook subsets.

[0146] Figure 15 above merely provides a schematic representation of an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between various steps may be appropriately adjusted, or several other steps may be added, or several steps may be removed. Those skilled in the art can make appropriate modifications based on the above description and are not limited to the description in Figure 15.

[0147] The above embodiments illustrate examples of the present invention, and the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, each of the above embodiments may be used individually, or one or more of the above embodiments may be used in combination.

[0148] According to this embodiment, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, it is possible to clarify how to configure Ng and the codebook subset.

[0149] <Example 3> Embodiments of the present invention provide a precoding configuration device. This device may be, for example, a terminal device, or one or more components configured within a terminal device. Descriptions of aspects similar to those in Embodiment 1 are omitted.

[0150] Figure 16 is a schematic diagram of an example of a precoding device according to an embodiment of the present invention. As shown in Figure 16, the precoding device 1600 includes the following parts.

[0151] The receiving unit 1601 receives configuration information from the network device.

[0152] Here, for SRS resources in a sounding reference signal (SRS) resource set where the first parameter (usage) is set to the first value (codebook), different numbers of antenna ports are configured, with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0153] In some embodiments, for the 8-port transmission of the terminal device, an antenna group number Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured.

[0154] In some embodiments, for a fully coherent terminal device, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports in an 8-port precoder that the terminal device can support.

[0155] 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 groups Ng, such that the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0156] In some embodiments, for a partially coherent terminal device having two antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0157] In some embodiments, for a partially coherent terminal device having two antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng, such that the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0158] In some embodiments, for a partially coherent terminal device having four antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0159] In some embodiments, for a partially coherent terminal device having four antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng, such that the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

[0160] In some embodiments, for a non-coherent terminal device, the number of antenna groups Ng is configured to be Ng=8, and the 4-port / 2-port codebook subset of the terminal device is configured to be noncoherent.

[0161] In some embodiments, the apparatus may further include the following parts, as shown in Figure 16.

[0162] The transmitting unit 1602 reports capability information to the network device.

[0163] Here, the capability information includes at least one or more of the following: the number of antenna groups Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, or information on combinations of the number of supported antenna groups Ng and the codebook subsets.

[0164] In some embodiments, the network device configures an antenna group number Ng and / or a codebook subset for the terminal device based on the capability information.

[0165] In some embodiments, the number of antenna groups Ng and the corresponding precoder are configured for 8-port transmission of the terminal device. The codebook subset or precoder for 4-port / 2-port transmission of the terminal device is obtained based on predefined information and / or the configured number of antenna groups Ng.

[0166] In some embodiments, if the second parameter (maxRank) is configured to be greater than 4 and 4 SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 4, and if the second parameter (maxRank) is configured to be greater than 4 and 2 SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 2.

[0167] In some embodiments, the precoder used for uplink transmission is indicated by one or more Transmit Precoding Matrix Indicators (TPMI) fields in the Downlink Control Information (DCI).

[0168] In some embodiments, the number of Transmit Precoding Matrix Indicator (TPMI) fields is the same for 8-port / 4-port / 2-port configurations, and the length of the Transmit Precoding Matrix Indicator (TPMI) field is determined by the bit width or the number of precoders in the TPMI field corresponding to the first SRS resource.

[0169] In some embodiments, among the configured SRS resources, the TPMI field corresponding to the first SRS resource has the longest bit width or the largest number of precoders.

[0170] In some embodiments, the number of transmit precoding matrix indicator (TPMI) fields differs for 8-port / 4-port / 2-port configurations, and the length of all transmit precoding matrix indicator (TPMI) fields for the 8 ports is used to determine the field length of the DCI.

[0171] In some embodiments, the number of transmit precoding matrix indicator (TPMI) fields differs for 8-port / 4-port / 2-port configurations, and the length of one or more transmit precoding matrix indicator (TPMI) fields for the 8-port configuration matches the length of the transmit precoding matrix indicator (TPMI) fields for the 4-port / 2-port configurations.

[0172] In some embodiments, the number of Transmit Precoding Matrix Indicators (TPMI) fields differs for 8-port / 4-port / 2-port systems, the length of one or more Transmit Precoding Matrix Indicators (TPMI) fields for the 8-port system does not match the length of the Transmit Precoding Matrix Indicators (TPMI) fields for the 4-port / 2-port system, and the bit width of the Transmit Precoding Matrix Indicators (TPMI) field is determined by the maximum length of the Transmit Precoding Matrix Indicators (TPMI) field for the 8-port / 4-port / 2-port system.

[0173] In some embodiments, the number of antenna groups Ng is configured for 8 ports, the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field for the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field for the 8 ports.

[0174] Although the above description only concerns components or modules related to the present invention, the present invention is not limited thereto. The precoding device 1600 may further include other components or modules. For specific details of these components or modules, refer to related technologies.

[0175] Furthermore, for the sake of clarity, Figure 16 merely illustrates the connection relationships or signal directions between various components or modules, but it will be apparent to those skilled in the art that various related techniques, such as bus connections, can be used. The various components or modules described above may also be implemented by hardware devices such as processors, memory, transmitters, and receivers, and the present invention is not limited thereto.

[0176] According to this embodiment, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, it is possible to clarify how to configure Ng and the codebook subset.

[0177] <Example 4> Embodiments of the present invention provide a precoding configuration device. This device may be, for example, a network device, or one or more components configured within a network device. Descriptions of the same aspects as in Embodiments 1 and 2 are omitted.

[0178] Figure 17 is a schematic diagram of another example of a precoding device according to an embodiment of the present invention. As shown in Figure 17, the precoding device 1700 includes the following parts.

[0179] The transmitting unit 1701 transmits configuration information to the terminal device.

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

[0181] In some embodiments, as shown in Figure 17, the precoding device 1700 may further include the following parts.

[0182] The receiving unit 1702 receives capability information transmitted by the terminal device.

[0183] Here, the capability information includes at least one or more of the following: the number of antenna groups Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, or information on combinations of the number of supported antenna groups Ng and the codebook subsets.

[0184] Although the above description only concerns components or modules related to the present invention, the present invention is not limited thereto. The precoding device 1700 may further include other components or modules. For specific details of these components or modules, refer to related technologies.

[0185] Furthermore, for the sake of clarity, Figure 17 merely illustrates the connection relationships or signal directions between various components or modules, but it will be apparent to those skilled in the art that various related techniques, such as bus connections, can be used. The various components or modules described above may also be implemented by hardware devices such as processors, memory, transmitters, and receivers, and the present invention is not limited thereto.

[0186] According to this embodiment, for an 8Tx UE supporting full power mode 2, if different numbers of antenna ports are configured for the SRS resources in the SRS resource set, and at least one SRS resource is configured with 8 ports, it is possible to clarify how to configure Ng and the codebook subset.

[0187] <Example 5> Embodiments of the present invention further provide a communication system, which may be described by referring to Figure 1, and the description of the same content as in Embodiments 1 to 4 will be omitted.

[0188] In some embodiments, the communication system 100 may include at least terminal equipment and network equipment.

[0189] The terminal device is capable of supporting 8Tx uplink transmission and supports full power mode 2, and the terminal device receives configuration information from the network device, and for sounding reference signal resources in a sounding reference signal resource set in which the first parameter usage is set to the first value codebook, a different number of antenna ports are configured, with at least one sounding reference signal resource having 8 ports, for the 8-port transmission of the terminal device a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device a codebook subset is configured, or for the 8-port transmission of the terminal device a number of antenna groups Ng and a corresponding precoder are configured.

[0190] The network device transmits the configuration information.

[0191] Embodiments of the present invention further provide a network device, which may be, for example, a base station, but the present invention is not limited thereto and may be other network devices.

[0192] Figure 18 is a schematic diagram of an example of a network device according to an embodiment of the present invention. As shown in Figure 18, the network device 1800 may include a processor 1810 (e.g., a central processing unit (CPU)) and a memory 1820, the memory 1820 being connected to the processor 1810. The memory 1820 may store various types of data, and may also store an information processing program 1830, and execute the program 1830 under the control of the processor 1810.

[0193] For example, the processor 1810 may execute a program to implement the precoding configuration method described in Embodiment 2. For example, the processor 1810 may be configured to perform the step of sending configuration information to a terminal device.

[0194] Here, for SRS resources in a sounding reference signal (SRS) resource set where the first parameter (usage) is set to the first value (codebook), different numbers of antenna ports are configured, with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0195] Furthermore, as shown in Figure 18, the network device 1800 may further include a transceiver 1840 and an antenna 1850, etc. The functions of the above components are similar to those of the prior art, and their explanation is omitted here. Note that the network device 1800 does not need to include all the units shown in Figure 18. Also, the network device 1800 may further include units not shown in Figure 18, and prior art may be referenced.

[0196] The embodiments of the present invention further provide terminal devices, but the present invention is not limited thereto and may include other devices.

[0197] Figure 19 is a schematic diagram of an example of a terminal device according to an embodiment of the present invention. As shown in Figure 19, the terminal device 1900 may include a processor 1910 and a memory 1920, the memory 1920 storing data and programs and connected to the processor 1910. Note that this figure is illustrative, and this structure may be supplemented or replaced with other types of structures to realize communication functions or other functions.

[0198] For example, the processor 1910 may execute a program to implement the precoding configuration method described in Embodiment 1. For example, the processor 1910 may be configured to perform the step of receiving configuration information from a network device.

[0199] Here, for SRS resources in a sounding reference signal (SRS) resource set where the first parameter (usage) is set to the first value (codebook), different numbers of antenna ports are configured, with at least one SRS resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

[0200] Furthermore, as shown in Figure 19, the terminal device 1900 may further include a communication module 1930, an input unit 1940, a display 1950, and a power supply 1960, etc. The functions of the above units are the same as in the prior art, and their explanation is omitted here. Note that the terminal device 1900 does not need to include all the units shown in Figure 19. Also, the terminal device 1900 may further include units not shown in Figure 19, and prior art may be referenced.

[0201] In embodiments of the present invention, a computer-readable program is provided, which, when executed on a terminal device, causes the terminal device to execute the precoding configuration method described in Embodiment 1.

[0202] Embodiments of the present invention further provide a storage medium that stores a computer-readable program, and which causes a terminal device to execute the precoding configuration method described in Embodiment 1 when executing the program.

[0203] In embodiments of the present invention, a computer-readable program is provided, which, when executed on a network device, causes the network device to execute the precoding configuration method described in Embodiment 2.

[0204] Embodiments of the present invention further provide a storage medium that stores a computer-readable program, and which causes a network device to execute the precoding configuration method described in Embodiment 2 when the program is executed.

[0205] The above-described apparatus and method of the present invention may be implemented by hardware, or by combining hardware and software. The present invention relates to a computer-readable program, and when the program is executed by a logic unit, the logic unit may implement the above-described apparatus or configuration requirements, or the logic unit may implement the above-described methods or steps. The present invention relates to a storage medium for storing the above-described program, such as a hard disk, magnetic disk, optical disk, DVD, flash memory, etc.

[0206] Each processing method in each apparatus described with reference to embodiments of the present invention may be implemented using hardware, software modules executed by a processor, or a combination of both. For example, one or more functional block diagrams shown in the drawings, or one or more combinations of functional block diagrams, may correspond to each software module in the computer program flow, or to each hardware module. These software modules may correspond to each step shown in the drawings. These hardware modules may be implemented by hardwareizing these software modules, for example, using a field-programmable gate array (FPGA).

[0207] The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM, or any other form of storage medium known to those skilled in the art. The storage medium may be connected to the processor so that the processor can read information from or write information to the storage medium, or the storage medium may be a component of the processor. The processor and the storage medium may reside in an ASIC. The software module may be stored in the memory of the mobile terminal or on a memory card inserted into the mobile terminal. For example, if the device (e.g., a mobile terminal) uses a relatively large capacity MEGA-SIM card or a high-capacity flash memory device, the software module may be stored on the MEGA-SIM card or high-capacity flash memory device.

[0208] One or more functional blocks and / or one or more combinations of functional blocks in the functional block diagrams shown in the drawings may be implemented by 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 unit, a discrete hardware component, or any suitable combination thereof for performing the functions described herein. One or more functional blocks and / or one or more combinations of functional blocks in the functional block diagrams shown in the drawings may be implemented, for example, by a combination of computing equipment, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors combined with DSP communication, or any other configuration.

[0209] Although the present invention has been described above with reference to specific embodiments, the above description is merely illustrative and does not limit the scope of protection of the present invention. Various modifications and changes can be made to the present invention as long as they do not deviate from the spirit and principles of the present invention, and these modifications and changes are also within the scope of the present invention.

[0210] Furthermore, the following additional information is disclosed regarding embodiments including the above-described examples. (Note 1) A precoding configuration method applicable to a terminal device that can support 8-transmission (8Tx) uplink transmission and supports full power mode 2, The terminal device includes the step of receiving configuration information from a network device, A method comprising configuring different numbers of antenna ports for SRS resources in a sounding reference signal (SRS) resource set in which a first parameter (usage) is set to a first value (codebook), wherein at least one SRS resource is configured with 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a subset of codebooks is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured. (Note 2) The method described in Appendix 1, wherein for the 8-port transmission of the terminal device, an antenna group number Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured. (Note 3) For fully coherent terminal equipment, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The method according to Appendix 2, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 4) For fully coherent terminal devices, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The method according to Appendix 2, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 5) For a partially coherent terminal device having two antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The method according to Appendix 2, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 6) For a partially coherent terminal device having two antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The method according to Appendix 2, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 7) For a partially coherent terminal device having four antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The method according to Appendix 2, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 8) For a partially coherent terminal device having four antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The method according to Appendix 2, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 9) The method according to Appendix 2, wherein, for a non-coherent terminal device, the number of antenna groups Ng is configured such that Ng = 8, and the 4-port / 2-port codebook subset of the terminal device is configured to be nonCoherent. (Note 10) The process further includes the step of the terminal device reporting capability information to the network device, The capability information is as described in any one of the following: the number of antenna groups Ng supported for 8 ports, the number of codebook subsets supported for 4 ports / 2 ports, or information on combinations of the number of supported antenna groups Ng and the number of codebook subsets, as described in any of the methods in Appendix 1 to 9. (Note 11) The method according to Appendix 10, wherein the network device configures the number of antenna groups Ng and / or a subset of codebooks for the terminal device based on the capability information. (Note 12) The method described in Appendix 1, wherein the number of antenna groups Ng and the corresponding precoder are configured for the 8-port transmission of the terminal device. (Note 13) The codebook subset or precoder for 4-port / 2-port transmission of the terminal device is obtained based on predefined information and / or the number of configured antenna groups Ng, as described in Appendix 12. (Note 14) If the second parameter (maxRank) is configured to be greater than 4, and four SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 4. The method according to any one of the appendices 1 to 13, wherein the terminal device determines (deems) the second parameter (maxRank) to be equal to 2 when the second parameter (maxRank) is configured to be greater than 4 and two SRS resources are indicated. (Note 15) The precoder used for the uplink transmission is as described in any of the methods in Appendix 1 to 14, indicated by one or more Transmit Precoding Matrix Indicators (TPMI) fields in the Downlink Control Information (DCI). (Note 16) 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 bit width of the TPMI field corresponding to the first SRS resource or the number of precoders, as described in Appendix 15. (Note 17) The method according to Appendix 16, wherein, among the configured SRS resources, the bit width of the TPMI field corresponding to the first SRS resource is the longest, or the number of precoders is the largest. (Note 18) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The length of all the Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports is determined by the method described in Appendix 15, which is used to determine the field length of the DCI. (Note 19) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The method according to Appendix 15, wherein the length of one or more transmit precoding matrix indicator (TPMI) fields of the eight ports matches the length of the transmit precoding matrix indicator (TPMI) fields of the four / two ports. (Note 20) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The method according to Appendix 15, wherein the length of one or more Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports does not match the length of the Transmit Precoding Matrix Indicator (TPMI) fields of the four ports / two ports, and the bit width of the Transmit Precoding Matrix Indicator (TPMI) field is determined by the maximum length of the Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports / four ports / two ports. (Note 21) The method according to any one of the appendices 15 to 20, wherein the number of antenna groups Ng is configured for 8 ports, the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field for the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field for the 8 ports. (Note 22) A precoding configuration method applicable to a terminal device that can support 8Tx uplink transmission (8Tx) and supports full power mode 2, The terminal device includes the step of receiving configuration information from a network device, If the second parameter (maxRank) is configured to be greater than 4, and four SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 4. A method for determining (deeming) that the second parameter (maxRank) is equal to 2, provided that the second parameter (maxRank) is configured to be greater than 4 and two SRS resources are indicated. (Note 23) A precoding configuration method applicable to a terminal device that can support 8Tx uplink transmission (8Tx) and supports full power mode 2, The terminal device includes the step of receiving configuration information from a network device, The precoder used for the uplink transmission is indicated by one or more Transmit Precoding Matrix Indicators (TPMI) fields in the Downlink Control Information (DCI). (Note 24) 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 bit width of the TPMI field corresponding to the first SRS resource or the number of precoders, as described in Appendix 23. (Note 25) The method according to Appendix 24, wherein, among the configured SRS resources, the bit width of the TPMI field corresponding to the first SRS resource is the longest, or the number of precoders is the largest. (Note 26) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The length of all the Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports is determined by the method described in Appendix 23, which is used to determine the field length of the DCI. (Note 27) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The method according to Appendix 23, wherein the length of one or more transmit precoding matrix indicator (TPMI) fields of the eight ports is the same as the length of the transmit precoding matrix indicator (TPMI) fields of the four ports / two ports. (Note 28) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The method according to Appendix 23, wherein the length of one or more Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports does not match the length of the Transmit Precoding Matrix Indicator (TPMI) fields of the four ports / two ports, and the bit width of the Transmit Precoding Matrix Indicator (TPMI) field is determined by the maximum length of the Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports / four ports / two ports. (Note 29) The method according to any one of the appendices 23 to 28, wherein the number of antenna groups Ng is configured for 8 ports, the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field for the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field for the 8 ports. (Note 30) A precoding configuration method applicable to network devices, The step includes the network device sending configuration information to a terminal device, A method comprising configuring different numbers of antenna ports for SRS resources in a sounding reference signal (SRS) resource set in which a first parameter (usage) is set to a first value (codebook), wherein at least one SRS resource is configured with 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a subset of codebooks is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured. (Note 31) The method according to Appendix 30, wherein for the 8-port transmission of the terminal device, an antenna group number Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured. (Note 32) For fully coherent terminal equipment, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The method according to Appendix 31, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 33) For fully coherent terminal devices, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The method according to Appendix 31, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 34) For a partially coherent terminal device having two antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The method according to Appendix 31, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 35) For a partially coherent terminal device having two antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The method according to Appendix 31, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 36) For a partially coherent terminal device having four antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate. The method according to Appendix 31, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 37) For a partially coherent terminal device having four antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng. The method according to Appendix 31, wherein the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support. (Note 38) The method according to Appendix 31, wherein, for a non-coherent terminal device, the number of antenna groups Ng is configured such that Ng = 8, and the 4-port / 2-port codebook subset of the terminal device is configured to be noncoherent. (Note 39) The network device further includes the step of receiving capability information transmitted by the terminal device, The capability information is as described in any one of the following: the number of antenna groups Ng supported for 8 ports, the number of codebook subsets supported for 4 ports / 2 ports, or information on combinations of the number of antenna groups Ng and the codebook subsets, as described in any of the methods in Appendix 30 to 38. (Note 40) The method according to Appendix 39, wherein the network device configures the number of antenna groups Ng and / or a subset of codebooks for the terminal device based on the capability information. (Note 41) The method described in Appendix 30, wherein the number of antenna groups Ng and the corresponding precoder are configured for the 8-port transmission of the terminal device. (Note 42) The method described in Appendix 41, wherein the 4-port / 2-port transmission codebook subset or precoder of the terminal device is obtained based on predefined information and / or the number of configured antenna groups Ng. (Note 43) If the second parameter (maxRank) is configured to be greater than 4, and four SRS resources are indicated, the terminal device determines (deems) that the second parameter (maxRank) is equal to 4. The method according to any one of the appendices 30 to 42, wherein the second parameter (maxRank) is configured to be greater than 4, and when two SRS resources are indicated, the terminal device determines (deems) the second parameter (maxRank) to be equal to 2. (Note 44) The precoder used for the uplink transmission is indicated by one or more Transmit Precoding Matrix Indicators (TPMI) fields in the Downlink Control Information (DCI), as described in any of the methods in Appendix 30 to 43. (Note 45) For 8-port / 4-port / 2-port, the number of Transmit Precoding Matrix Indicator (TPMI) fields is the same. The method according to Appendix 44, wherein the length of the Transmit Precoding Matrix Indicator (TPMI) field is determined by the bit width of the TPMI field corresponding to the first SRS resource or the number of precoders. (Note 46) The method according to Appendix 45, wherein, among the configured SRS resources, the bit width of the TPMI field corresponding to the first SRS resource is the longest, or the number of precoders is the largest. (Note 47) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The length of all the Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports is determined by the method described in Appendix 44, which is used to determine the field length of the DCI. (Note 48) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The method according to Appendix 44, wherein the length of one or more transmit precoding matrix indicator (TPMI) fields of the eight ports matches the length of the transmit precoding matrix indicator (TPMI) fields of the four / two ports. (Note 49) For 8-port / 4-port / 2-port configurations, the number of Transmit Precoding Matrix Indicator (TPMI) fields differs. The method according to Appendix 44, wherein the length of one or more Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports does not match the length of the Transmit Precoding Matrix Indicator (TPMI) fields of the four ports / two ports, and the bit width of the Transmit Precoding Matrix Indicator (TPMI) field is determined by the maximum length of the Transmit Precoding Matrix Indicator (TPMI) fields of the eight ports / four ports / two ports. (Note 50) The method according to any one of the appendices 44 to 49, wherein the number of antenna groups Ng is configured for 8 ports, the codebook subset is configured for 4-port / 2-port transmission, and the length of the transmit precoding matrix indication (TPMI) field for the 4-port / 2-port is less than or equal to the length of the transmit precoding matrix indication (TPMI) field for the 8 ports. (Note 51) A terminal device comprising a memory storing a computer program and a processor, wherein the processor is configured to implement the precoding configuration method described in any of the appendices 1 to 29 by executing the computer program. (Note 52) A network device comprising a memory storing a computer program and a processor, wherein the processor is configured to implement the precoding configuration method described in any of appendices 30 to 50 by executing the computer program.

Claims

1. A precoding configuration device configured as a terminal device that can support 8Tx uplink transmission and supports full power mode 2, Includes a receiving unit that receives configuration information from a network device, A device in which, for a 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, with at least one sounding reference signal resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

2. The apparatus according to claim 1, wherein for the 8-port transmission of the terminal device, an antenna group number Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured.

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

4. For a partially coherent terminal device having two antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support, or The apparatus according to claim 2, wherein for a partially coherent terminal device having two antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

5. For a partially coherent terminal device having four antenna groups, the configuration of the number of antenna groups Ng and the configuration of the codebook subset are independent or separate, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support, or The apparatus according to claim 2, wherein for a partially coherent terminal device having four antenna groups, the configuration of the codebook subset is determined by the configuration of the number of antenna groups Ng, and the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the number of in-phase ports of an 8-port precoder corresponding to the configured number of antenna groups Ng, or the number of precoded in-phase ports in the 4-port / 2-port codebook subset of the terminal device does not exceed the maximum number of in-phase ports of an 8-port precoder that the terminal device can support.

6. The apparatus according to claim 2, wherein, for a non-coherent terminal device, the number of antenna groups Ng is configured to be Ng = 8, and the 4-port / 2-port codebook subset of the terminal device is configured to be non-coherent.

7. The system further includes a transmission unit that reports capability information to the aforementioned network device, The apparatus according to claim 1, wherein the capability information includes at least one or more of the following: the number of antenna groups Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, or combination information of the number of supported antenna groups Ng and the codebook subsets.

8. The apparatus according to claim 7, wherein the network device configures the number of antenna groups Ng and / or a subset of codebooks for the terminal device based on the capability information.

9. For the 8-port transmission of the aforementioned terminal device, the number of antenna groups Ng and the corresponding precoder are configured. The apparatus according to claim 1, wherein the 4-port / 2-port transmission codebook subset or precoder of the terminal device is obtained based on predefined information and / or the number of configured antenna groups Ng.

10. If the second parameter maxRank is configured to be greater than 4, and four sounding reference signal resources are indicated, the terminal device determines that the second parameter maxRank is equal to 4. The apparatus according to claim 1, wherein the second parameter maxRank is configured to be greater than 4, and when two-port sounding reference signal resources are indicated, the terminal device determines that the second parameter maxRank is equal to 2.

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

12. For 8-port, 4-port, and 2-port ports, the number of transmission precoding matrix instruction fields is the same. The apparatus according to claim 11, wherein the length of the transmit precoding matrix instruction field is determined by the bit width or the number of precoders of the transmit precoding matrix instruction field corresponding to the first sounding reference signal resource.

13. The apparatus according to claim 12, wherein, among the configured sounding reference signal resources, the bit width of the transmission precoding matrix instruction field corresponding to the first sounding reference signal resource is the longest, or the number of precoders is the largest.

14. For 8-port, 4-port, and 2-port configurations, the number of transmission precoding matrix instruction fields differs. The apparatus according to claim 11, wherein the lengths of all eight transmit precoding matrix instruction fields are used to determine the field length of the downlink control information.

15. For 8-port, 4-port, and 2-port configurations, the number of transmission precoding matrix instruction fields differs. The apparatus according to claim 11, wherein the length of one or more of the eight ports' transmit precoding matrix instruction fields is the same as the length of the four ports' / two ports' transmit precoding matrix instruction fields.

16. For 8-port, 4-port, and 2-port configurations, the number of transmission precoding matrix instruction fields differs. The apparatus according to claim 11, wherein the length of one or more of the eight ports' transmit precoding matrix instruction fields does not match the length of the four-port / two-port's transmit precoding matrix instruction fields, and the bit width of the transmit precoding matrix instruction field is determined by the maximum length of the eight-port / four-port / two-port's transmit precoding matrix instruction fields.

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

18. A precoding configuration device configured in a network device, Includes a transmission unit that transmits configuration information to a terminal device, A device in which, for a 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, with at least one sounding reference signal resource having 8 ports, and for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, a number of antenna groups Ng and a corresponding precoder are configured.

19. The system further includes a receiving unit that receives capability information transmitted by the terminal device, The apparatus according to claim 18, wherein the capability information includes at least one or more of the following: the number of antenna groups Ng supported for 8 ports, the codebook subsets supported for 4 ports / 2 ports, or combination information of the number of supported antenna groups Ng and the codebook subsets.

20. A communication system including terminal equipment and network equipment, The terminal device is capable of supporting 8Tx uplink transmission and supports full power mode 2, and the terminal device receives configuration information from the network device, and for sounding reference signal resources in a sounding reference signal resource set in which the first parameter usage is set to the first value codebook, a different number of antenna ports are configured, with at least one sounding reference signal resource having 8 ports, and for the 8-port transmission of the terminal device, the number of antenna groups Ng and the corresponding precoder are configured, and for the 4-port / 2-port transmission of the terminal device, a codebook subset is configured, or for the 8-port transmission of the terminal device, the number of antenna groups Ng and the corresponding precoder are configured. The network device is a communication system that transmits the configuration information.

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