Uplink data transmission, uplink data receiving device and method

Abstract

In an embodiment of the present invention, an uplink data transmission, an uplink data receiving apparatus, and a method are provided. The uplink data transmission method is applied to a terminal device, and a first SRS resource set and a second SRS resource set are set in the terminal device. The method includes: the terminal device receiving downlink control information, determining the number of layers and DMRS ports based on the downlink control information, and transmitting uplink data using a first transmission scheme or a second transmission scheme. Thereby, the terminal device can determine the number of layers and DMRS ports based on the received downlink control information and transmit uplink data using a specific transmission scheme. In this way, flexible indication for parameters such as the number of layers and DMRS ports can be realized, dynamic switching between different transmission schemes can be supported, and the terminal device can transmit uplink data using appropriate uplink transmission parameters, so that the throughput or reliability of uplink data transmission can be guaranteed.

Description

[Technical Field]

[0001] The present invention relates to the field of communications. [Background technology]

[0002] 3GPP (registered trademark) is working on standardization of unified transmission configuration indication (TCI) in the Release 17 (Rel-17) standardization process, among which the unified TCI in Rel-17 is mainly designed for single transmission and reception point (sTRP) scenarios.

[0003] With the progress of standardization work, multiple transmission and reception points (mTRP) will become an important scenario for 5G NR systems, and mTRP-based transmission can achieve the goals of improving throughput or reliability.

[0004] In previous standardization work, Rel-16 standardized mTRP-based Physical Downlink Shared Channel (PDSCH) transmission, and Rel-17 standardized mTRP-based Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH) transmission, among which mTRP transmission includes mTRP transmission based on single Downlink Control Information (sDCI) and mTRP transmission based on multiple DCI (mDCI).

[0005] It should be noted that the introduction of the above background art is intended to clearly and completely explain the technical solutions of the present invention and to facilitate understanding by those skilled in the art, and these technical solutions described in the background art of the present invention should not be construed as being known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0006] In a scenario where the Rel-17 unified TCI is for a single transmission and reception point (sTRP), a network device configures M (M≧1) TCI states for a terminal device using RRC signaling, activates N (1≦N≦M) TCI states among the M TCI states using a medium access control (MAC) control element (CE), and indicates L (1≦L≦N) TCI states among the N TCI states using downlink control information (DCI). A transmission configuration indication (TCI) field of DCI format 1_1 or DCI format 1_2 indicates one or more TCI states. DCI format 1_1 or DCI format 1_2 may schedule downlink data, in which case it is referred to as DCI format 1_1 / 1_2 with DL assignment, or may not schedule downlink data, in which case it is referred to as DCI format 1_1 / 1_2 without DL assignment.

[0007] One TCI state (abbreviated as TCI) may include or correspond to one or two source reference signals (source RS, source reference signal). The source reference signal may provide Quasi Co-Location (QCL) information for downlink reception and is referred to as a downlink source reference signal. The source reference signal may provide a reference for an uplink transmission spatial filter (UL TX spatial filter) and is referred to as an uplink source reference signal. The source reference signal may provide beam information for a target channel / signal. For example, the beam for a terminal device to receive a target channel / signal is the same as the beam for receiving a downlink source reference signal. Also, for example, the beam for a terminal device to transmit a target channel / signal is the same as the beam for transmitting an uplink source reference signal. Also, for example, the beam for a terminal device to transmit a target channel / signal and the beam for receiving a downlink source reference signal have reciprocity, i.e., they use beams with opposite directions.

[0008] Therefore, an instruction or update to a TCI state actually includes an instruction or update to the beam used by the terminal device. The TCI state includes a joint TCI state, a downlink TCI state, and an uplink TCI state. The source reference signal included in the downlink TCI state is a downlink source reference signal, the source reference signal included in the uplink TCI state is an uplink source reference signal, and the source reference signal included in the joint TCI state is both a downlink source reference signal and an uplink source reference signal. The joint TCI state simultaneously affects the downlink beam (receive beam) and the uplink beam (transmit beam). In other words, the downlink beam and the uplink beam use the same beam, but the beam directions are opposite, i.e., there is reciprocity between the uplink and downlink beams. The downlink TCI state only affects the downlink beam. The uplink TCI state only affects the uplink beam. The uplink beam is also called the uplink transmit spatial filter. The TCI field can indicate a joint TCI state (joint DL / UL TCI), or the TCI field can indicate a downlink TCI state and / or an uplink TCI state (separate DL / UL TCI), and these two modes can be configured by RRC signaling. In the case of Rel-17 unified TCI, one TCI field indicates one joint TCI state, or one downlink TCI state, or one uplink TCI state, or one downlink TCI state and one uplink TCI state.

[0009] Multiple TRP (mTRP, multiple transmission and reception point) is an important scenario in 5G NR systems, and mTRP-based transmission can achieve the goals of improving throughput or reliability. Rel-16 standardized mTRP-based PDSCH transmission, while Rel-17 standardized mTRP-based PDCCH, PUSCH, and PUCCH transmission. Furthermore, mTRP transmission in the current Rel-17 includes mTRP transmission based on sDCI (single DCI) and mTRP transmission based on mDCI (multiple DCI). For sDCI mTRP, one DCI schedules uplink and downlink transmissions of two TRPs, which is more suitable when the backhaul between the TRPs is ideal. For mDCI mTRP, two TRPs schedule uplink and downlink transmissions of their respective TRPs using two DCIs, which is more suitable when the backhaul between the TRPs is not ideal.

[0010] However, the inventors have discovered the following: In the case of Rel-17, a terminal device uses only one panel for each uplink transmission. Therefore, even if the terminal device has multiple panels, Rel-17 does not support simultaneous uplink transmission using multiple panels. Although the standardization work for Rel-18 has not yet officially begun, simultaneous multi-panel uplink transmission has already been confirmed as one of the contents of the Rel-18 project. That is, based on the unified TCI framework and mTRP scenario, Rel-18 will conduct research and standardization work on a scheme for simultaneous multi-panel UL transmission (STxMP) for terminal devices.

[0011] In the case of the STxMP scheme, it may include different specific transmission schemes. However, in the sDCI mTRP scenario, one DCI needs to indicate the number of layers, precoding matrix, and DMRS port used by multiple panels, i.e., the number of layers, precoding matrix, and DMRS port used for multiple transmissions. In the Rel-17 time division multiplexing-based mTRP PUSCH scheme, one DCI can indicate the number of layers and precoding matrix used for multiple transmissions, but this indication is limited to the assumption that the multiple transmissions use the same number of layers and the same DMRS port. However, for some transmission schemes in the STxMP scheme, multiple transmissions from multiple panels may use different numbers of layers and different DMRS ports. Therefore, the Rel-18 STxMP scheme cannot directly reuse the indication method in the Rel-17 mTRP scheme.

[0012] Therefore, how to specify parameters such as the number of layers, precoding matrix, DMRS port, etc. for a specific (predetermined) transmission scheme in the STxMP scheme remains an open issue.

[0013] To address at least one of the above-mentioned problems, an embodiment of the present invention provides a method and apparatus for uplink data transmission and uplink data reception. A terminal device determines the number of layers and DMRS ports based on received downlink control information, and then transmits uplink data using a specific transmission scheme. This allows flexible indication of parameters such as the number of layers and DMRS ports and supports dynamic switching between different transmission schemes. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission. [Means for solving the problem]

[0014] According to one aspect of an embodiment of the present invention, there is provided an uplink data transmission method, which is applied to a terminal device, wherein the terminal device is configured with a first SRS resource set and a second SRS resource set, and the method includes: The terminal device receives downlink control information; and The method includes determining the number of layers and the DMRS ports based on the downlink control information, and transmitting the uplink data using the first transmission scheme or the second transmission scheme.

[0015] According to another aspect of the embodiment of the present invention, there is provided an uplink data receiving method, which is applied to a network device, and the method includes: The network device transmits downlink control information; and receiving uplink data transmitted in a first transmission scheme or a second transmission scheme by the network device; The terminal device determines the number of layers and the DMRS port based on the downlink control information, and transmits the uplink data through the first transmission scheme or the second transmission scheme, in which a first SRS resource set and a second SRS resource set are configured in the terminal device.

[0016] According to another aspect of the embodiment of the present invention, there is provided an uplink data transmission apparatus, which is disposed in a terminal device, wherein the terminal device is configured with a first SRS resource set and a second SRS resource set, and the uplink data transmission apparatus: a receiving unit for receiving downlink control information; and The downlink control information includes a transmitting unit that determines the number of layers and the DMRS port based on the downlink control information, and transmits uplink data using the first transmission scheme or the second transmission scheme.

[0017] According to another aspect of the embodiment of the present invention, there is provided an uplink data receiving apparatus, the uplink data receiving apparatus being disposed in a network device, the uplink data receiving apparatus comprising: a transmitting unit for transmitting downlink control information; and a receiving unit for receiving uplink data transmitted in the first transmission scheme or the second transmission scheme; The terminal device determines the number of layers and the DMRS port based on the downlink control information, and transmits the uplink data through the first transmission scheme or the second transmission scheme, in which a first SRS resource set and a second SRS resource set are configured in the terminal device. [Effects of the Invention]

[0018] The advantageous effects of the embodiment of the present invention are at least as follows.

[0019] The terminal device determines the number of layers and DMRS ports based on the received downlink control information, and transmits uplink data using a specific transmission scheme, thereby realizing flexible indication of parameters such as the number of layers and DMRS ports and supporting dynamic switching between different transmission schemes. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission.

[0020] The following description and the accompanying drawings disclose in detail certain embodiments of the present invention, illustrating ways in which the principles of the present invention may be employed. However, the scope of the present invention is not limited thereto. Embodiments of the present invention may include various changes, modifications, and alternatives within the scope of the appended claims.

[0021] Furthermore, 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 the other embodiments, or may be substituted for features in the other embodiments.

[0022] It should be noted that terms such as "comprise / have" when used in this specification refer to the presence of a feature, element, step or assembly, but do not exclude the presence or addition of one or more other features, elements, steps or assemblies. [Brief explanation of the drawings]

[0023] Elements and features described in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like reference numerals are used to indicate corresponding parts in several drawings and to indicate corresponding parts used in multiple embodiments. [Figure 1] 1 is a diagram illustrating a communication system according to an embodiment of the present invention. [Figure 2] A diagram showing an uplink data transmission method in an embodiment of the present invention. [Figure 3] FIG. 10 is a diagram illustrating an example of determining the number of layers and DMRS ports in an embodiment of the present invention. [Figure 4] FIG. 10 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention. [Figure 5] FIG. 10 is a diagram illustrating yet another example of determining the number of layers and DMRS ports in an embodiment of the present invention. [Figure 6] 10 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention. [Figure 7] 10 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention. [Figure 8] 10 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention. [Figure 9] A diagram showing an uplink data receiving method in an embodiment of the present invention. [Figure 10] FIG. 1 is a diagram illustrating an uplink data transmission device according to an embodiment of the present invention. [Figure 11] 1 is a diagram illustrating an uplink data receiving device according to an embodiment of the present invention. [Figure 12] FIG. 1 is a configuration diagram of a network device according to an embodiment of the present invention. [Figure 13] FIG. 2 is a diagram illustrating a terminal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The foregoing and other features of the present invention will become more apparent from the following detailed description and the accompanying drawings, in which: While the specification and drawings disclose particular embodiments of the present invention, these represent only some of the embodiments which may employ the principles of the present invention, and it is to be understood that the present invention is not limited to the described embodiments, but rather includes all such modifications, variations, and alternatives which fall within the scope of the appended claims.

[0025] In embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as LTE (Long Term Evolution), LTE-A (LTE-Advanced), WCDMA (Wideband Code Division Multiple Access), HSPA (High-Speed ​​Packet Access), etc.

[0026] Additionally, communications between devices in a communications system may be performed according to any level of communications protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other conventional or future-developed communications protocols.

[0027] In the embodiments of the present invention, the term "network equipment" refers to a device that connects a terminal device to a communication network and provides services to the terminal device in a communication system, for example, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0028] A base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a 5G base station (gNB), etc., and may further include a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). The term "base station" may include some or all of the functions thereof, and each base station can provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or the area it covers, depending on the context in which the term is used. Unless confusion arises, the terms "cell" and "base station" are interchangeable.

[0029] In embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives services from the network, for example, via network equipment. User equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, subscriber station (SS), access terminal (AT), station, etc.

[0030] User equipment may include, but is not limited to, cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, mobile devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smart watches, digital cameras, and the like.

[0031] Furthermore, for example, in a scenario such as the Internet of Things (IoT), the user equipment may also be a monitoring or measuring device or apparatus, for example, including but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0032] Furthermore, the term "network side" or "network equipment side" refers to the network side, which may be a base station or may include one or more network equipment as described above. The term "user side" or "terminal side" or "terminal equipment side" refers to the user or terminal side, which may be a UE or may include one or more terminal equipment as described above. Unless otherwise specified, "equipment" herein may refer to network equipment or may also refer to terminal equipment.

[0033] The following describes an example scenario of the present invention, but the present invention is not limited thereto.

[0034] 1 is a diagram showing a communication system in an embodiment of the present invention, taking a terminal device and a network device as an example. As shown in FIG. 1, the communication system 100 may include a first TRP 101, a second TRP 102, and a terminal device 103. Of these, the first TRP 101 and the second TRP 102 may be network devices. For convenience, FIG. 1 illustrates an example in which only two network devices and one terminal device are used, but the embodiment of the present invention is not limited thereto.

[0035] In an embodiment of the present invention, conventional services (services / traffic) or future services can be transmitted between the first TRP 101, the second TRP 102, and the terminal device 103. For example, these services include, but are not limited to, eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), URLLC (Ultra-Reliable and Low-Latency Communication), etc.

[0036] Rel-16 standardizes mTRP-based PDSCH transmission, while Rel-17 standardizes mTRP-based PDCCH, PUSCH, and PUCCH transmission. mTRP transmission includes mTRP transmission based on sDCI (single DCI) and mTRP transmission based on mDCI (multiple DCI). In the case of sDCI mTRP, one DCI schedules the uplink and downlink transmissions of two TRPs, which is more suitable when the backhaul between the TRPs is ideal. In the case of mDCI mTRP, two TRPs schedule the uplink and downlink transmissions of their respective TRPs using two DCIs, which is more suitable when the backhaul between the TRPs is not ideal.

[0037] Taking the terminal device 103 as an example of transmitting a PUSCH in the mTRP scenario, as shown in Figure 1, the terminal device 103 transmits a PUSCH in a PUSCH repetition manner, for example, transmitting to the first TRP 101 in slot 1 and transmitting to the second TRP 102 in slot 2, and the rest can be inferred accordingly.

[0038] In the mTRP scenario, two SRS resource sets are configured in the terminal device, each corresponding to two TRPs. For example, two SRS resource sets are configured in the terminal device. For example, the terminal device 103 is configured with a first SRS resource set (1st SRS resource set) corresponding to the first TRP 101, and the terminal device 103 is configured with a second SRS resource set (2nd SRS resource set) corresponding to the second TRP 102.

[0039] Due to differences in geographical locations of the first TRP 101 and the second TRP 102, the terminal device may transmit PUSCH to the first TRP 101 and / or the second TRP 102 based on transmission parameters such as different precoding matrices, SRS resource indicators (SRIs), power control parameters, etc. The terminal device also obtains transmission parameters for the first TRP 101 and the second TRP 102 based on the first SRS resource set and the second SRS resource set.

[0040] For example, the transmission parameter is SRS resource indicator (SRI). For a dynamic uplink grant, two SRI fields in DCI indicate SRS resources in two SRS resource sets, respectively. For a configured grant, two SRIs are configured to two SRS resource sets by RRC. Therefore, the terminal device needs to know the mapping relationship between PUSCH repetitions and SRS resource sets, that is, to know which SRS resource set each PUSCH repetition should be transmitted based on.

[0041] However, Rel-18 plans to conduct research and standardization work on a simultaneous multi-panel UL transmission (STxMP) scheme for terminal devices. For example, in an sDCI mTRP scenario, one DCI indicates the number of layers, precoding matrix, and DMRS port used by multiple panels, i.e., one DCI needs to indicate the number of layers, precoding matrix, and DMRS port used for multiple transmissions. In the Rel-17 time-division multiplexing-based mTRP PUSCH scheme, one DCI can indicate the number of layers and precoding matrix used for multiple transmissions, but this indication is limited to the assumption that multiple transmissions use the same number of layers and the same DMRS port. However, for some transmission schemes in the STxMP scheme, multiple transmissions from multiple panels may use different numbers of layers and different DMRS ports. Therefore, the Rel-18 STxMP scheme cannot directly reuse the indication method used in the Rel-17 mTRP scheme.

[0042] To address at least one of the above problems, embodiments of the present invention provide a method and apparatus for uplink data transmission and uplink data reception.

[0043] <Example of the first aspect> An embodiment of the present invention provides an uplink data transmission method, which is applied to a terminal device side, in which a first SRS resource set and a second SRS resource set are configured.

[0044] FIG. 2 illustrates an uplink data transmission method according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps (operations): 201: A terminal device receives downlink control information; and 202: Determine the number of layers and the DMRS port according to the downlink control information, and transmit the uplink data using the first transmission scheme or the second transmission scheme.

[0045] Note that, although the above-mentioned FIG. 2 is used to exemplify an embodiment of the present invention and uses a terminal device as an example, the present invention is not limited thereto. For example, the execution order of each operation can be appropriately adjusted, some operations can be added or removed, and the targets of the above-mentioned operations can be adjusted. In other words, those skilled in the art are not limited to the description of the above-mentioned FIG. 2 and can make appropriate modifications based on the above content.

[0046] In some implementations, the terms "TRP" and "SRS resource set" are interchangeable. The terms "TRP" and "CSI-RS resource set" are interchangeable. The terms "corresponding," "associated," and "comprising" are interchangeable. The terms "uplink TCI state" and "joint TCI state" are interchangeable. The terms "PUSCH," "PUSCH transmission," and "PUSCH transmission" are interchangeable. "TPMI" refers to information indicated by a "Precoding information and number of layers" field or a "Second Precoding information" field in DCI, and includes precoding matrix information and layer number information. The above field may be abbreviated as a "TPMI field." Note that the above is merely an exemplary description, and embodiments of the present invention are not limited thereto.

[0047] Thus, the terminal device can determine the number of layers and DMRS ports according to the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible indication of parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission.

[0048] In some implementations, the first transmission scheme includes an SDM scheme, and the second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme.

[0049] For example, the STxMP scheme in Rel-18 may include one of a Space Division Multiplexing (SDM) scheme, a Frequency Division Multiplexing (FDM) scheme, and a Single-Frequency Network (SFN) scheme.

[0050] For example, in the case of an SDM scheme, it means that at least two panels simultaneously transmit different layers on the same time-frequency resource, e.g., panel 1 transmits layer 1 and layer 2, and panel 2 transmits layer 3; in the case of an FDM scheme, it means that at least two panels simultaneously transmit on different frequency resources, transmitting two different parts of one PUSCH or transmitting two PUSCH repetitions of a PUSCH; and in the case of an SFN scheme, it means that at least two panels simultaneously transmit the same data on the same time-frequency resource.

[0051] For example, the sTRP scheme and the mTRP scheme in the embodiments of the present invention refer to the sTRP PUSCH transmission scheme and the mTRP PUSCH transmission scheme in Rel-17, and detailed descriptions thereof will be omitted here.

[0052] In some implementations, the downlink control information may be referred to as an uplink grant (UL grant) or uplink scheduling downlink control information (UL DCI). The downlink control information may include multiple fields, such as a first field and a second field, where the first field includes a first indication field and / or a second indication field.

[0053] For example, the first instruction field indicates transmission parameters of a first panel or a first SRS resource set, and / or the second instruction field indicates transmission parameters of a second panel or a second SRS resource set.

[0054] In some implementations, the first indication field is a first uplink precoding index (transmit precoding matrix indicator, TPMI) field or a first SRS resource indicator (SRI) field, and / or the second indication field is a second uplink precoding index (transmit precoding matrix indicator, TPMI) field or a second SRS resource indicator (SRI) field, and the second field is an antenna port field.

[0055] In some implementations, when transmitting codebook-based uplink data, the first indication field is a first TPMI field and / or the second indication field is a second TPMI field, and when transmitting non-codebook-based uplink data, the first indication field is a first SRI field and / or the second indication field is a second SRI field. For example, the differences between codebook-based PUSCH transmission and non-codebook-based PUSCH transmission are as follows: for non-codebook-based PUSCH transmission, TPMI does not need to be indicated, or it may be described that the TPMI field is not present in the downlink control information. Examples of codebook-based uplink data transmission and non-codebook-based uplink data transmission will be described below.

[0056] In some implementations, when transmitting uplink data using a first transmission scheme, a first layer number is determined based on a first indication field, and a second layer number is determined based on a second indication field, where the first layer number and the second layer number are the same or different, and a DMRS port is determined based on the sum of the first layer number and the second layer number and the second field. Below, examples of codebook-based and non-codebook-based uplink data transmission are given.

[0057] Below, a description will be given taking codebook-based PUSCH transmission as an example.

[0058] In some implementations, the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme, the bit width of the second instruction field in the first transmission scheme is equal to or greater than the bit width of the second instruction field in the second transmission scheme, and the bit width of the second instruction field is equal to the bit width of the first instruction field.

[0059] 3 is a diagram illustrating an example of determining the number of layers and DMRS ports in an embodiment of the present invention. For example, the first indication field is a first TPMI field, the second indication field is a second TPMI field, and the second field is an antenna port field. For example, the first transmission scheme is an SDM scheme, and the second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme. Figure 3 takes the sTRP scheme and the mTRP scheme as examples.

[0060] As shown in Figure 3, the first TPMI and the number of layers (L1) are determined based on the first TPMI field of the DCI, the second TPMI and the number of layers (L1) are determined based on the second TPMI field of the DCI, the bit width of the second TPMI field is determined based on the maximum value of the bit width required for multiple schemes, and the DMRS port is determined based on the sum of L1 and L2 and the antenna ports field.

[0061] This is exemplarily illustrated in Figure 3. In the case of the SDM scheme, the first TPMI and the number of layers (L1) are indicated by the first TPMI field of the DCI, and the second TPMI and the number of layers (L2) are indicated by the second TPMI field of the DCI. Alternatively, the above information may be described as being independently indicated by two TPMI fields, and therefore the bit width of the second TPMI field is equal to the bit width of the first TPMI field. As shown in Figure 3, in the case of the mTRP scheme, there is a restriction of L2 = L1, i.e., L2 indicates the second TPMI under known conditions, and therefore the second TPMI field does not need to indicate information related to L2, and therefore the bit width of the second TPMI may be smaller than the bit width of the first TPMI field. In the case of the sTRP scheme, there is no need to indicate the second TPMI, and therefore the second TPMI field is reserved, i.e., unused.

[0062] Therefore, to support dynamic switching among the SDM scheme, the sTRP scheme, and the mTRP scheme, it is necessary to ensure that the bit widths of the fields in the DCI are the same for the SDM scheme, the sTRP scheme, and the mTRP scheme, i.e., the bit width of the second TPMI field needs to be determined based on the largest bit width among the above three schemes, for example, as shown in Figure 3, the bit width of the second TPMI field is the bit width of the second TPMI field in the SDM scheme and is also equal to the bit width of the first TPMI field. For a specific transmission scheme, if the actually used bit width is smaller than the bit width of the second TPMI field determined as above (e.g., the mTRP scheme), bit stuffing (also called padding) is performed on the actually used bit width so that it is equal to the bit width of the second TPMI field determined as above.

[0063] The method for determining the bit widths of the first and second TPMI fields will be described below with an example.

[0064] In some embodiments, the first layer number (L1) and the second layer number (L2) are determined based on the first TPMI field and the second TPMI field of the DCI, respectively.

[0065] For example, in the case of an SDM scheme, the first TPMI and the number of layers (L1) are determined based on the first TPMI field, the bit width (number of bits) and meaning of which are shown in Table 1 (which may be referred to as "Table 7.3.1.1.2-2") below, and the second TPMI and the number of layers (L2) are determined based on the second TPMI field, the bit width and meaning of which are also shown in Table 1 (which may be referred to as "Table 7.3.1.1.2-2") below.

[0066] Furthermore, a tuple consisting of the first layer number and the second layer number may be represented as (L1, L2), and the value of the tuple satisfies the following condition, i.e., the tuple is one of (1,1), (1,2), (2,1), and (2,2).

[0067] Table 7.3.1.1.2-2: Precoding information and number of layers,for 4 antenna ports,if transform precoder is disabled,maxRank=2 or 3 or 4,and ul-FullPowerTransmission is not configured or configured to fullpowerMode2 or configured to fullpower.

[0068] [Table 1] That is, the number of bits corresponding to different codebook subset types in Table 1 above (which may be referred to as "Table 7.3.1.1.2-2") can be expressed as in Table 2 below.

[0069] [Table 2] In summary, in order to support dynamic switching of multiple schemes, the bit width of the second TPMI field is determined based on the maximum bit width required for multiple schemes. For example, for the second TPMI field, the bit width required for the second transmission scheme is smaller than the bit width required for the first transmission scheme, for example, the first transmission scheme is an SDM scheme, and the second transmission scheme is one of an mTRP scheme, an FDM scheme, and an SFN scheme.

[0070] For example, in the case of a first transmission scheme (e.g., an SDM scheme), the second TPMI field is determined based on Table 1 above (which may be referred to as "Table 7.3.1.1.2-2"), i.e., the bit width required for the second TPMI field is as shown in Table 2, and in the case of a second transmission scheme (e.g., one of an mTRP scheme, an FDM scheme, and an SFN scheme), the second TPMI field is determined based on Table 3 below (which may be referred to as "Table 7.3.1.1.2-2C"), so the bit width required for the second TPMI field is as shown in Table 4.

[0071] Table 7.3.1.1.2-2C:Second precoding information,for 4 antenna ports,if transform precoder is disabled,maxRank=2 or 3 or 4,and ul-FullPowerTransmission is not configured or configured to fullpowerMode2 or configured to fullpower.

[0072] [Table 3] That is, the number of bits corresponding to different codebook subset types in Table 3 above (which may be referred to as "Table 7.3.1.1.2-2C") can be expressed as in Table 4 below.

[0073] [Table 4] In some embodiments, to support terminal equipment dynamic switching between the first and second transmission schemes, the bit width of the second TPMI field is equal to the maximum value of the second TPMI field in the first and second transmission schemes.

[0074] In some embodiments, for the second TPMI field, if the bit width required for a certain scheme is smaller than the bit width of the second TPMI field, when the terminal equipment uses that scheme, the most significant digit or the least significant digit of the second TPMI field is filled with '0'.

[0075] For example, in the above example, the bit width in Table 2 is greater than the bit width in Table 4, so the bit width of the second TPMI field is determined based on Table 2. For example, in the case of a second transmission scheme, e.g., one of the mTRP scheme, FDM scheme, and SFN scheme, as described above, the bit width of the second TPMI field required by the second transmission scheme (as shown in Table 4) is smaller than the determined bit width of the second TPMI field (as shown in Table 2), so when the terminal equipment uses the second transmission scheme, the most significant digit of the second TPMI field is filled with '0', and the terminal equipment ignores the fill bit and still determines the second TPMI based on Table 3 (which may be referred to as "Table 7.3.1.1.2-2C").

[0076] For example, taking the column of "codebookSubset=fullyAndPartialAndNonCoherent" as an example, when the first transmission scheme is the SDM scheme, the second TPMI field in the DCI indicates "110111", which indicates the row of index=55 in the above Table 1 (which may be referred to as "Table 7.3.1.1.2-2"); when the second transmission scheme is the mTRP scheme, it is first necessary to fill one '0' bit in the most significant digit, and then the second TPMI field in the DCI indicates, for example, "011011", which still determines some rows in Table 3 (which may be referred to as "Table 7.3.1.1.2-2C") based on the five least significant bits, i.e., based on "11011", it indicates the row of index=55 in the above Table 3 (which may be referred to as "Table 7.3.1.1.2-2C"). 7.3.1.1.2-2C”), and in conjunction with the layer number indicated in the first TPMI in the DCI, for example, L1=1, the first occurrence of the row with index=27 can be uniquely determined.

[0077] In some embodiments, how to realize dynamic switching between the first and second transmission schemes is not limited by the present invention; for example, the terminal device may determine the use of the first or second transmission scheme based on a specific DCI field or based on specific time-frequency resources indicated by the DCI.

[0078] In some implementations, among the at least two DMRS ports, a first portion of the DMRS ports belong to a first CDM group, a second portion of the DMRS ports belong to a second CDM group, a first layer number or a first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and a second layer number or a second SRS resource set is associated with the second CDM group and the DMRS ports included therein, wherein the first CDM group is the CDM group to which a first DMRS port of the at least two DMRS ports belongs. In some implementations, the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0079] For example, a CDM group refers to a group in which different DMRS ports can share the same time-frequency resource, and different DMRS ports can be distinguished by using different orthogonal codes in the time domain and frequency domain. Different CDM groups use different time-frequency resources. The specific mapping relationship between DMRS ports and CDM groups can be found in the prior art and relevant specifications in standards, and is not limited thereto in the present invention.

[0080] The following describes how to determine the DMRS port.

[0081] In some embodiments, in the case of an SDM scheme, the DMRS port is determined based on the sum of L1 and L2 and the antenna ports field.

[0082] For example, for an SDM scheme, when L1 and L2 are obtained based on the above implementation scheme, the rank of the SDM scheme is rank = L1 + L2. The indication of the DMRS port by the antenna ports field depends on the rank, where rank is one of the lookup table parameters, and different ranks correspond to different DMRS port lookup tables, and the antenna ports field indicates a certain DMRS port setting in the lookup table.

[0083] In some embodiments, different DMRS ports belong to two CDM groups, a first portion of the DMRS ports belong to a first CDM group, a second portion of the DMRS ports belong to a second CDM group, a first layer number or a first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and a second layer number or the second SRS resource set is associated with the second CDM group and the DMRS ports included therein, wherein the first CDM group is the CDM group to which the first DMRS port of the at least two DMRS ports belongs.

[0084] For example, when an SDM scheme is configured or indicated, DMRS port 0, DMRS port 2, and DMRS port 3 may be indicated; in other words, DMRS port 0, DMRS port 2, and DMRS port 3 are one DMRS port combination that can be used for the SDM scheme.

[0085] In some implementations, the first TPMI is associated with the CDM group to which the first DMRS port belongs, and the second TPMI is associated with another CDM group, for example, the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0086] For example, the first DMRS port among the DMRS ports is port 0, the CDM group to which it belongs is CDM group 0, the first TPMI is associated with DMRS port 0 and CDM group 0, and DMRS port 2 and DMRS port 3 belong to the second CDM group, i.e., CDM group 1, so the second TPMI is associated with DMRS port 2, DMRS port 3, and CDM group 1.

[0087] For example, in the case of an SDM scheme, the DMRS port is determined based on the antenna ports field. The bit width and meaning of the antenna ports field are shown in the following four Tables 5 to 8, where Table 5 may also be referred to as "Table 7.3.1.1.2-8", Table 6 may also be referred to as "Table 7.3.1.1.2-9", Table 7 may also be referred to as "Table 7.3.1.1.2-10", and Table 8 may also be referred to as "Table 7.3.1.1.2-11", where "Table 7.3.1.1.2-8" to "Table 7.3.1.1.2-11" respectively correspond to different rank values, where rank = L1 + L2. When the DMRS type is Type 1 (i.e., dmrs-Type=1) and the maximum length of the DMRS symbol is set to one symbol (i.e., maxLength=1), the four tables are used. For example, the table numbers in "Table 7.3.1.1.2-8" to "Table 7.3.1.1.2-11" described below are exemplary explanations based on the current standard (e.g., related chapters in TS38.212). However, they may be adaptively changed based on updated chapters as the standard progresses. The present invention is not limited to this. For example, for "Table 7.3.1.1.2-8" to "Table 7.3.1.1.2-11" described below, the table numbers may be changed to the relevant rows (e.g., DMRS It is possible to reuse rows corresponding to the shaded areas other than the cases of 0, 2, and 3 for port(s), e.g., the fourth row with Value=3 in "Table 7.3.1.1.2-9"), or to add new related rows based on the tables in the current standard (e.g., rows corresponding to the shaded areas for 0, 2, and 3 for DMRS port(s), e.g., the second row with Value=1 in "Table 7.3.1.1.2-10").

[0088] For example, in the case of an SDM scheme, the antenna ports field can only indicate that a DMRS port belongs to two different CDM group rows, for example, the rows marked with shading in the table below, and cannot indicate other rows. L1 and L2 are determined based on the first TPMI field and the second TPMI field, respectively, where the first TPMI is associated with the CDM group (first CDM group) of the indicated first DMRS port, and the second TPMI is associated with another CDM group (second CDM group), where the second CDM group is different from the first CDM group. The rows marked with shading in the table below can be used for the SDM scheme, and their corresponding (L1, L2) are shown in the last column of the table below.

[0089] For example, since L1+L2>1, the contents of the table for rank=1 do not apply, i.e., in the SDM scheme, the following table "Table 7.3.1.1.2-8" is not used. For example, as shown in the first row of "Table 7.3.1.1.2-10," associating a first TPMI with CDM group 0 (DMRS port 0 and DMRS port 1) and a second TPMI with CDM group 1 (DMRS port 2) is equivalent to associating a first SRS resource set with DMRS port 0 and DMRS port 1 and a second SRS resource set with DMRS port 2. As shown in the second row of "Table 7.3.1.1.2-10," associating a first TPMI with CDM group 0 (DMRS port 0) and a second TPMI with CDM group 1 (DMRS port 2 and DMRS port 3) is equivalent to associating a first SRS resource set with DMRS port 0 and a second SRS resource set with DMRS port 3. 2 and DMRS port 3.

[0090] In some implementations, after (L1, L2) is determined based on the above-mentioned method, the following tables (e.g., Table 5 to Table 20) corresponding to different (L1, L2) combinations can be determined, and the antenna ports field in the DCI can indicate each row marked with shading in the table. That is, each of the following tables (e.g., Table 5 to Table 20) is an exemplary explanation for easily understanding the correspondence between (L1, L2) and different DMRS ports and / or different DMRS CDM group(s). An actually used table may not have a column for (L1, L2), and the present invention is not limited thereto.

[0091] Table 5 (Table 7.3.1.1.2-8): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=1.

[0092] [Table 5] Table 6 (Table 7.3.1.1.2-9): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=2.

[0093] [Table 6] Table 7 (Table 7.3.1.1.2-10): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=3.

[0094] [Table 7] Table 8 (Table 7.3.1.1.2-11): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=4.

[0095] [Table 8] In some embodiments, the four tables 5-8 above can be replaced with the four tables 9-12 below.

[0096] For example, if the DMRS type is Type 1 (ie, dmrs-Type=1) and the maximum length of the DMRS symbol is set to two symbols (ie, maxLength=2), the substitution is performed.

[0097] The process of determining the DMRS port is the same as that described above, and a detailed description thereof will be omitted here. For example, Table 9 may be referred to as "Table 7.3.1.1.2-12", Table 10 may be referred to as "Table 7.3.1.1.2-13", Table 11 may be referred to as "Table 7.3.1.1.2-14", and Table 12 may be referred to as "Table 7.3.1.1.2-15".

[0098] Table 9 (Table 7.3.1.1.2-12): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=1.

[0099] [Table 9] Table 10 (Table 7.3.1.1.2-13): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=2.

[0100] [Table 10] Table 11 (Table 7.3.1.1.2-14): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=3.

[0101] [Table 11] Table 12 (Table 7.3.1.1.2-15): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=4.

[0102] [Table 12] In some embodiments, the four tables 5-8 above can be replaced with the four tables 13-16 below.

[0103] For example, if the DMRS type is Type 2 (ie, dmrs-Type=2) and the maximum length of the DMRS symbol is set to one symbol (ie, maxLength=1), the replacement is performed.

[0104] The process of determining the DMRS port is the same as that described above, and a detailed description thereof will be omitted here. For example, Table 13 may be called "Table 7.3.1.1.2-16", Table 14 may be called "Table 7.3.1.1.2-17", Table 15 may be called "Table 7.3.1.1.2-18", and Table 16 may be called "Table 7.3.1.1.2-19".

[0105] Table 13 (Table 7.3.1.1.2-16): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=1.

[0106] [Table 13] Table 14 (Table 7.3.1.1.2-17): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=2.

[0107] [Table 14] Table 15 (Table 7.3.1.1.2-18): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=3.

[0108] [Table 15] Table 16 (Table 7.3.1.1.2-19): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=4.

[0109] [Table 16] In some embodiments, the four Tables 5-8 above can be replaced with the following four Tables 17-20.

[0110] For example, if the DMRS type is Type 2 (ie, dmrs-Type=2) and the maximum length of the DMRS symbol is set to two symbols (ie, maxLength=2), the substitution is performed.

[0111] The process of determining the DMRS port is the same as that described above, and a detailed description thereof will be omitted here. For example, Table 17 may be called "Table 7.3.1.1.2-20", Table 18 may be called "Table 7.3.1.1.2-21", Table 19 may be called "Table 7.3.1.1.2-22", and Table 20 may be called "Table 7.3.1.1.2-23".

[0112] Table 17 (Table 7.3.1.1.2-20): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=1.

[0113] [Table 17] Table 18 (Table 7.3.1.1.2-21): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=2.

[0114] [Table 18] Table 19 (Table 7.3.1.1.2-22): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=3.

[0115] [Table 19] Table 20 (Table 7.3.1.1.2-23): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=4.

[0116] [Table 20] In some embodiments, in the case of the sTRP scheme and the mTRP scheme, the DMRS port may be determined based on the above four tables, where rank = L1 = L2. For example, the DCI indicates that the terminal device uses a specific one of the sTRP scheme, the mTRP scheme, and the SDM scheme. In the case of the sTRP scheme and the mTRP scheme, the DMRS port is determined based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20), where rank = L1 = L2. In the case of the SDM scheme, the DMRS port is also determined based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20), where rank = L1 + L2. This makes it possible to realize dynamic switching between the sTRP scheme, the mTRP scheme, and the SDM scheme.

[0117] In some embodiments, in the case of STxMP schemes other than the SDM scheme, such as the FDM scheme or the SFN scheme, the DMRS port may also be determined based on the above four tables (Tables 5-8, or Tables 9-12, or Tables 13-16, or Tables 17-20), where rank=L1=L2. For example, the DCI indicates that the terminal device uses a specific one of the sTRP scheme, mTRP scheme, FDM scheme, SFN scheme, and SDM scheme. In the cases of the sTRP scheme, mTRP scheme, FDM scheme, and SFN scheme, the DMRS port is determined based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20), where rank = L1 = L2. In the case of the SDM scheme, the DMRS port is determined based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20), where rank = L1 + L2. This makes it possible to dynamically switch between the sTRP scheme, mTRP scheme, FDM scheme, SFN scheme, and SDM scheme.

[0118] In some embodiments, when an STxMP scheme is configured or indicated, the DMRS port may be determined based on the above four tables (Tables 5-8, or Tables 9-12, or Tables 13-16, or Tables 17-20), where the STxMP scheme includes at least one of an SDM scheme, an FDM scheme, and an SFN scheme.

[0119] For example, if a terminal device is configured by RRC signaling to be able to use the SDM scheme, the terminal device may be further instructed by DCI which of the sTRP scheme, mTRP scheme, and SDM scheme to use, and the terminal device can determine the DMRS port based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20).

[0120] For example, when the terminal device is configured by RRC signaling to be able to use the STxMP scheme, the terminal device may be further instructed by DCI which of the sTRP scheme, mTRP scheme, FDM scheme, SFN scheme, and SDM scheme to use, and the terminal device can determine the DMRS port based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20). For example, when the terminal device is instructed by DCI to employ the SDM scheme, the terminal device can determine the DMRS port based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20).

[0121] In some embodiments, when transmitting uplink data in an SFN scheme, the TPMI and the number of layers are determined based on the first TPMI field, the second TPMI field is reserved or is not present, and the DMRS port is determined based on the number of layers and the antenna ports field.

[0122] In some embodiments, when transmitting uplink data in an SFN scheme, two SRS resources are determined based on two SRI fields.

[0123] For example, in the case of an SFN scheme, since two panels use the same TPMI, number of layers, and DMRS port, the TPMI and number of layers L may be determined based only on the first TPMI field, and the second TPMI field may be reserved, i.e., unused. Alternatively, the UL DCI may not include the second TPMI field, i.e., include only the first TPMI field, and the DMRS port may be determined based on the above four tables (Tables 5 to 8, or Tables 9 to 12, or Tables 13 to 16, or Tables 17 to 20), where rank=L, thereby determining the TPMI, number of layers, and DMRS port in the SFN scheme. For example, the UL DCI may further include two SRI fields, each indicating two SRS resources associated with the two panels. This may support transmission of uplink data based on accurate uplink parameters under the SFN scheme.

[0124] The above description has been given taking codebook-based PUSCH transmission as an example, but hereinafter, non-codebook-based PUSCH transmission will be described.

[0125] In the case of non-codebook based PUSCH, TPMI does not need to be indicated, and there is no TPMI field in the UL DCI, e.g., the first indication field is the first SRI field and / or the second indication field is the second SRI field.

[0126] FIG. 4 is another example of determining the number of layers and DMRS ports in an embodiment of the present invention.

[0127] In some implementations, the number of layers can be determined based on the first SRI field and / or the second SRI field, for example, the number of layers is equal to the number of SRS resources indicated by the first SRI field and / or the second SRI field. For example, the method for determining the bit width of the second SRI field is the same as the above-mentioned method, and detailed description thereof will be omitted here.

[0128] Therefore, unlike in Figure 3 where L1 and L2 are determined based on two TPMI fields, in the case of non-codebook based PUSCH, L1 and L2 are determined based on the first SRI field and the second SRI field, respectively. For example, if the first SRI field indicates one SRS resource and the second SRI field indicates two SRS resources, (L1, L2) are correspondingly (1, 2). The method of determining a DMRS port based on (L1, L2) is the same as the above-mentioned method, and a detailed description thereof will be omitted here.

[0129] In some implementations, when transmitting uplink data using a first transmission scheme, a first layer number is determined based on a first indication field, a second layer number is determined based on a second indication field, where the first layer number and the second layer number are the same or different, and a DMRS port is determined based on a correspondence relationship between the first layer number, the second layer number, and the DMRS port, where the second field is reserved. Below, examples of codebook-based uplink data transmission and non-codebook-based uplink data transmission are respectively described.

[0130] Below, a description will be given taking codebook-based PUSCH transmission as an example.

[0131] In some implementations, for example, the first indication field is a first TPMI field, and the second indication field is a second TPMI field. For example, the first TPMI and the number of layers (L1) are determined based on the first TPMI field of the DCI, the second TPMI and the number of layers (L1) are determined based on the second TPMI field of the DCI, the bit width of the second TPMI field is determined based on the maximum value of the bit widths required for multiple schemes, the DMRS port is determined based on (L1, L2), and the antenna ports field is a reserved field and is not used.

[0132] In some implementations, the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme, the bit width of the second instruction field in the first transmission scheme is equal to or greater than the bit width of the second instruction field in the second transmission scheme, and the bit width of the second instruction field is equal to the bit width of the first instruction field.

[0133] 5 is another example of determining the number of layers and DMRS ports in an embodiment of the present invention. For example, the first indication field is a first TPMI field, the second indication field is a second TPMI field, and the second field is an antenna port field. For example, the first transmission scheme is an SDM scheme, and the second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme, and FIG. 5 takes the sTRP scheme and the mTRP scheme as an example.

[0134] For example, in the case of the SDM scheme, the first TPMI and the number of layers (L1) are indicated by the first TPMI field of the DCI, the second TPMI and the number of layers (L2) are indicated by the second TPMI field of the DCI, and the bit width of the second TPMI field is determined based on the largest bit width of the three schemes. For example, the method of determining the bit width of the second TPMI field is the same as that described above, and a detailed description thereof will be omitted here.

[0135] As shown in Figure 5, the terminal device determines L1 and L2 based on the first TPMI field and the second TPMI field, i.e., obtains (L1, L2), and then determines the DMRS port corresponding to (L1, L2) based on the following Table 21. In other words, since (L1, L2) have a one-to-one mapping relationship with the DMRS port, the terminal device can determine the DMRS port based on a predefined mapping relationship, and the antenna ports field is a reserved field and is not used. For example, Table 21 may be set in a predefined manner, and the present invention is not limited thereto.

[0136] [Table 21] For example, in each row of Table 21, a DMRS port belongs to two CDM groups, and the CDM group of the first DMRS port is referred to as the first CDM group (e.g., CDM group 0), and the other CDM group is referred to as the second CDM group (e.g., CDM group 1), where L1 is equal to the number of DMRS ports in the first CDM group, and L2 is equal to the number of DMRS ports in the second CDM group. For example, when the terminal device determines (L1, L2) based on the first TPMI field and the second TPMI field to be (2, 1), it determines the DMRS port to be 0-2 based on the second row of Table 21. As in the above-described method, associating the first TPMI with CDM group 0 (DMRS port 0, DMRS port 1) and the second TPMI with CDM group 1 (DMRS port 2) is equivalent to associating the first SRS resource set with DMRS port 0 and DMRS port 1, and the second SRS resource set with DMRS port 2.

[0137] For example, the association relationship between each TPMI in each row of Table 21 and each CDM group and each DMRS port may be predefined, and the present invention is not limited to this.

[0138] The above description has been given taking codebook-based PUSCH transmission as an example. Below, non-codebook-based PUSCH transmission will be described.

[0139] In the case of non-codebook based PUSCH, TPMI does not need to be indicated, and there is no TPMI field in the UL DCI, e.g., the first indication field is the first SRI field and / or the second indication field is the second SRI field.

[0140] FIG. 6 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention.

[0141] In some implementations, the number of layers can be determined based on the first SRI field and / or the second SRI field, for example, the number of layers is equal to the number of SRS resources indicated by the first SRI field and / or the second SRI field. For example, the method for determining the bit width of the second SRI field is the same as the method described above, and detailed description thereof will be omitted here.

[0142] Therefore, unlike in Figure 5 where L1 and L2 are determined based on two TPMI fields, in the case of non-codebook based PUSCH, L1 and L2 are determined based on the first SRI field and the second SRI field, respectively. For example, if the first SRI field indicates two SRS resources and the second SRI field indicates one SRS resource, (L1, L2) are correspondingly (1, 2). The method of determining the DMRS port based on (L1, L2) is the same as the above-mentioned method, and a detailed description thereof will be omitted here.

[0143] When transmitting uplink data using a first transmission scheme, a DMRS port is determined based on the second field, and the number of first layers and the number of second layers of the first transmission scheme are determined based on the correspondence between the DMRS port and the number of layers. The first indication field is determined under the condition that the number of first layers is known, and the second indication field is determined under the condition that the number of second layers is known. Below, transmission of codebook-based uplink data and transmission of non-codebook-based uplink data are described using examples.

[0144] Below, a description will be given taking codebook-based PUSCH transmission as an example.

[0145] In some implementations, the bit width of the first indicator field is equal to the maximum bit width of the first indicator field in the first and second transmission schemes, the bit width of the first indicator field in the first transmission scheme is equal to or less than the bit width of the first indicator field in the second transmission scheme, the bit width of the second indicator field is equal to the maximum bit width of the second indicator field in the first and second transmission schemes, and the bit width of the second field is equal to the maximum bit width of the second field in the first and second transmission schemes. The bit width of the second field in the first transmission scheme is equal to or less than the bit width of the second field in the second transmission scheme.

[0146] In some implementations, the bit width of the second indicator field is equal to the bit width of the first indicator field.

[0147] 7 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention. For example, the first indication field is a first TPMI field, the second indication field is a second TPMI field, and the second field is an antenna ports field. For example, the first transmission scheme is an SDM scheme, and the second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme. In FIG. 7, the sTRP scheme and the mTRP scheme are taken as examples.

[0148] In some embodiments, for example, in the case of an SDM scheme, the DMRS port and (L1, L2) are determined based on the antenna ports field, for example, based on a new lookup table (e.g., Table 22 below), and the antenna ports field indicates a certain DMRS port, L1, and L2 setting in the lookup table, i.e., indicates a certain row.

[0149] [Table 22] In some implementations, the bit width of the second field is equal to the maximum bit width of the second field in the first and second transmission schemes, and the bit width of the second field in the first transmission scheme is equal to or less than the bit width of the second field in the second transmission scheme. For example, as shown in Figure 7, in the case of an SDM scheme, the bit width of the antenna ports field is smaller than the bit width of the antenna ports field of an sTRP or an mTRP. In order to support dynamic switching between the SDM scheme, the sTRP scheme, and the mTRP scheme, the bit width of the antenna ports field is equal to the maximum bit width of the antenna ports field in the SDM scheme, the sTRP scheme, and the mTRP. Therefore, when the bit width required for the antenna ports field in a particular scheme becomes smaller, bit stuffing is performed accordingly.

[0150] In some implementations, the bit width of the first instruction field is equal to the maximum bit width of the first instruction field in the first transmission scheme and the second transmission scheme, the bit width of the first instruction field in the first transmission scheme is less than or equal to the bit width of the first instruction field in the second transmission scheme, and the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme.

[0151] For example, as shown in Figure 7, assuming that the antenna ports field indicates (L1, L2), the second TPMI field indicates the second TPMI under the condition that L2 is known. Since the mTRP scheme also indicates the second TPMI under the condition that L2 is known, the second TPMI fields in the SDM scheme and the mTRP scheme have the same bit width, and the number of bits in the second TPMI fields in the SDM scheme and the mTRP scheme are the same as those in Table 4 above.

[0152] Similarly, since the first TPMI field in the SDM scheme indicates the first TPMI under the condition that L1 is known, the bit width of the first TPMI field is equal to the bit width of the second TPMI field, e.g., the same as the number of bits in the above Table 4. However, since the first TPMI field in the mTRP scheme needs to indicate the first TPMI and L1, it requires a larger bit width than the second TPMI field, and the same as the number of bits in the above Table 2. To support dynamic switching among the SDM scheme, the sTRP scheme, and the mTRP scheme, the bit width of the first TPMI field needs to be determined based on the maximum bit width of the three schemes, i.e., it needs to be equal to the bit width of the mTRP scheme, so bit stuffing needs to be performed on the first TPMI field in the SDM scheme.

[0153] The method for determining the bit width of the second field will be described below using an example.

[0154] In some embodiments, for the antenna ports field, the bit width in the first transmission scheme is smaller than the bit width in the second transmission scheme, for example, the first transmission scheme is SDM and the second transmission scheme is one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme.

[0155] For example, in the case of the second transmission scheme, the antenna ports field is determined based on Tables 5 to 8 above, so the required bit width for the antenna ports field is 3 bits, and in the case of the first transmission scheme, the antenna ports field is determined based on Table 22, so the required bit width for the antenna ports field is 2 bits. In order to support the terminal device to dynamically switch between the first and second transmission schemes, the bit width of the antenna ports field needs to be equal to the maximum value of the above-mentioned bit width, for example, 3 bits for the above-mentioned maximum value. Therefore, the bit width of the antenna ports field is 3 bits.

[0156] In some embodiments, for the antenna ports field, if the bit width required for a certain scheme is smaller than the bit width of the antenna ports field, the most significant or least significant digit of the antenna ports field is filled with '0' when the terminal equipment uses that scheme.

[0157] For example, one of the above-mentioned schemes is an SDM scheme, and as mentioned above, the bit width (2 bits) of the antenna ports field of this scheme is smaller than the bit width (3 bits) of the antenna ports field. When a terminal device uses this scheme, the most significant digit of the antenna ports field is filled with '0', and the terminal device ignores the filled bits and still determines the DMRS port according to Table 22. For example, for the indicated "001", it is still determined to correspond to the second row of Table 22 according to the bit value of "01".

[0158] In some embodiments, in the case of an SDM scheme, the DMRS port and (L1, L2) are determined based on the antenna ports field.

[0159] For example, the DMRS port and (L1, L2) are determined based on the antenna ports field, and the bit width (2 bits) and meaning of the antenna ports field are as shown in Table 22. In each row of the table below, a DMRS port belongs to two CDM groups, and the CDM group of the first DMRS port is called the first CDM group (e.g., CDM group 0), and the other CDM group is called the second CDM group (e.g., CDM group 1), where L1 is equal to the number of DMRS ports in the first CDM group, and L2 is equal to the number of DMRS ports in the second CDM group.

[0160] In some embodiments, in the case of an SDM scheme, the first TPMI is determined based on L1 and / or the second TPMI is determined based on L2.

[0161] For example, the terminal equipment obtains the DMRS port and (L1, L2) based on the antenna ports field, the first TPMI is associated with L1, and the second TPMI is associated with L2, and the first TPMI and second TPMI can be determined based on the first TPMI field and the second TPMI field on the premise that L1 and L2 are known, and the bit width and meaning of the first TPMI field and the second TPMI field are as shown in Table 23 below.

[0162] Taking L2=2 as an example, it corresponds to the row in Table 23 where 2 layers are located. For different restrictions on different codebook subset ("codebookSubset") types, the second TPMI can be indicated by 5 bits, 4 bits, or 3 bits, for example, the same as the number of bits in Table 4 above. Similarly, the first TPMI can also be determined using the same method.

[0163] Table 23:Second precoding information,for 4 antenna ports,if transform precoder is disabled,maxRank=2 or 3 or 4,and ul-FullPowerTransmission is not configured or configured to fullpowerMode2 or configured to fullpower.

[0164] [Table 23] In some implementations, the bit width of the second indicator field is equal to the bit width of the first indicator field.

[0165] For example, the second TPMI field indicates the second TPMI under conditions known by L2, and the first TPMI field indicates the first TPMI under conditions known by L1, and both fields indicate TPMI based on Table 23, and therefore the second TPMI field and the first TPMI field have the same bit width.

[0166] The method for determining the bit width of the first TPMI field will be described below using an example.

[0167] In some embodiments, the bit width of the first TPMI field is determined based on the maximum bit width required for multiple schemes.

[0168] In some embodiments, for the first TPMI field, the bit width of the first transmission scheme is smaller than the bit width of the second transmission scheme, e.g., the first transmission scheme is SDM and the second transmission scheme is one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme.

[0169] For example, in the case of the mTRP scheme, the first TPMI field is determined based on Table 1, and the bit widths required for the first TPMI field are as shown in Table 2 (i.e., 6 bits, 5 bits, and 4 bits), while in the case of the SDM scheme, the first TPMI field is determined based on Table 23 (the same number of bits as in Table 4, i.e., 5 bits, 4 bits, and 3 bits). In order to support the terminal device to dynamically switch between the first and second transmission schemes, the bit width of the first TPMI field needs to be the maximum value of the above-mentioned bit widths. For example, since Table 2 includes the maximum values ​​of the above-mentioned bit widths, the bit widths required for the first TPMI field are as shown in Table 2 (i.e., 6 bits, 5 bits, and 4 bits).

[0170] In some embodiments, for the first TPMI field, if the bit width required for a certain scheme is smaller than the bit width of the first TPMI field, when the terminal equipment uses that scheme, the most significant digit or the least significant digit of the first TPMI field is filled with '0'.

[0171] For example, the above-mentioned scheme is an SDM scheme. As mentioned above, the bit width of the first TPMI field of this scheme (as shown in Table 4) is smaller than the bit width of the first TPMI field (as shown in Table 2). When the terminal device uses this scheme, the most significant digit of the first TPMI field is filled with '0', and the terminal device ignores the filled bit and still determines the first TPMI based on Table 23. For details, please refer to the above-mentioned method, and a detailed description thereof will be omitted here.

[0172] The method for determining the bit width of the second TPMI field will be described below using an example.

[0173] In some embodiments, the bit width of the second TPMI field is determined based on the maximum bit width required for multiple schemes.

[0174] In some embodiments, for the second TPMI field, the bit width of the first transmission scheme is equal to the bit width of the second transmission scheme, e.g., the first transmission scheme is SDM and the second transmission scheme is one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme.

[0175] For example, in the case of the mTRP scheme, the second TPMI field is determined based on Table 3, and the bit widths required for the second TPMI field are as shown in Table 4 (i.e., 5 bits, 4 bits, and 3 bits); in the case of the SDM scheme, the second TPMI field is determined based on Table 23, and the bit widths required for the second TPMI field are as shown in Table 4 (i.e., 5 bits, 4 bits, and 3 bits); and in the case of the sTRP scheme, the second TPMI field does not need to be used. In order to support the terminal equipment's dynamic switching between the first and second transmission schemes, the bit width of the second TPMI field needs to be equal to the maximum value of the above-mentioned bit widths. For example, since Table 2 includes the maximum values ​​of the above-mentioned bit widths, the bit widths required for the first TPMI field are as shown in Table 4 (i.e., 5 bits, 4 bits, and 3 bits).

[0176] In some embodiments, for the second TPMI field, if the bit width required for a certain scheme is smaller than the bit width of the first TPMI field, the most significant or least significant digit of the second TPMI field is filled with '0' when the terminal equipment uses that scheme.

[0177] For example, one scheme mentioned above is the sTRP scheme, and when a terminal device uses this scheme, all significant digits of the second TPMI field are filled with '0', and the terminal device ignores the fill bits.

[0178] The above description has been given taking codebook-based PUSCH transmission as an example. Below, non-codebook-based PUSCH transmission will be described.

[0179] For non-codebook based PUSCH, TPMI does not need to be indicated, and there is no TPMI field in the UL DCI, e.g., the first indication field is the first SRI field and / or the second indication field is the second SRI field.

[0180] 8 is a diagram illustrating another example of determining the number of layers and DMRS ports in an embodiment of the present invention. For example, similar to the aforementioned codebook-based PUSCH, (L1, L2) and DMRS ports are determined based on the antenna ports field. The first SRI field and the second SRI field indicate the first SRI and the second SRI, respectively, under the condition that L1 and L2 are known. Note that the method for determining the bit widths of the second field, the first SRI field, and the second SRI field is the same as the method described above, and detailed description thereof will be omitted here. For specific details of the indication of the first SRI and the second SRI by the first SRI field and the second SRI field, please refer to the prior art, and the present invention is not limited thereto.

[0181] The above-described embodiments are provided to exemplify the present invention, but the present invention is not limited to these, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or a plurality of the above-described embodiments may be used in combination.

[0182] As can be seen from the above embodiment, the terminal device can determine the number of layers and DMRS ports according to the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible indication of parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission.

[0183] <Example of the second aspect> In an embodiment of the present invention, an uplink data receiving method is provided, which is applied to a network device. The embodiment of the present invention can be combined with the embodiment of the first aspect, or can be implemented independently. Note that the description of the same content as the embodiment of the first aspect will be omitted here.

[0184] FIG. 9 illustrates an uplink data receiving method according to an embodiment of the present invention. As shown in FIG. 9, the method includes the following steps: 901: Transmitting downlink control information; and 902: Receive uplink data transmitted through a first transmission scheme or a second transmission scheme, in which a terminal device determines the number of layers and a DMRS port according to the downlink control information, and transmits the uplink data through the first transmission scheme or the second transmission scheme, in which a first SRS resource set and a second SRS resource set are configured in the terminal device.

[0185] Note that, although the above-mentioned FIG. 9 is used to exemplify an embodiment of the present invention, the present invention is not limited thereto. For example, the execution order of each step may be adjusted, or some steps may be added or removed. In other words, those skilled in the art may make appropriate modifications based on the above content without being limited to the description of the above-mentioned FIG. 9.

[0186] The above-described embodiments are provided to exemplify the present invention, but the present invention is not limited to these, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or a plurality of the above-described embodiments may be used in combination.

[0187] As can be seen from the above embodiment, the terminal device can determine the number of layers and DMRS ports according to the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible indication of parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission.

[0188] <Example of the third aspect> An embodiment of the present invention provides an uplink data transmission device. The device may be, for example, a terminal device, or one or more components or assemblies provided in the terminal device, and the terminal device is configured with a first SRS resource set and a second SRS resource set. Note that, here, descriptions of the same content as in the embodiments of the first and second aspects will be omitted.

[0189] FIG. 10 is a diagram illustrating an uplink data transmission device according to an embodiment of the present invention.

[0190] As shown in FIG. 10, an uplink data transmitting apparatus 1000 includes: A receiving unit 1001: receives downlink control information; and The transmitting unit 1002 determines the number of layers and the DMRS port according to the downlink control information, and transmits the uplink data using the first transmission scheme or the second transmission scheme.

[0191] In some implementations, the first transmission scheme includes a Space Division Multiplexing (SDM) scheme, the second transmission scheme includes one of a single transmission and reception point (sTRP) scheme, a multiple transmission and reception point (mTRP) sTRP scheme, a Frequency Division Multiplexing (FDM) scheme, and a single-frequency network (SFN) scheme, and the downlink control information includes a first field and a second field, in which the first field includes a first indication field and / or a second indication field.

[0192] In some implementations, when transmitting uplink data using a first transmission scheme, the first layer number is determined based on a first indication field, and the second layer number is determined based on a second indication field, where the first layer number and the second layer number are the same or different, and the DMRS port is determined based on the sum of the first layer number and the second layer number and the second field.

[0193] In some implementations, among the at least two DMRS ports, a first portion of the DMRS ports belong to a first CDM group, and a second portion of the DMRS ports belong to a second CDM group; a first layer number or a first SRS resource set is associated with the first CDM group and the DMRS ports included therein; and a second layer number or a second SRS resource set is associated with the second CDM group and the DMRS ports included therein, wherein the first CDM group is the CDM group to which the first DMRS port of the at least two DMRS ports belongs.

[0194] In some implementations, the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0195] In some implementations, when transmitting uplink data using the first transmission scheme, the first layer number is determined based on the first indication field, and the second layer number is determined based on the second indication field, where the first layer number and the second layer number are the same or different, and the DMRS port is determined based on the correspondence between the first layer number, the second layer number and the DMRS port, where the second field is reserved.

[0196] In some implementations, the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme, and the bit width of the second instruction field in the first transmission scheme is greater than or equal to the bit width of the second instruction field in the second transmission scheme.

[0197] In some implementations, the bit width of the second indicator field is equal to the bit width of the first indicator field.

[0198] In some implementations, when transmitting uplink data using the first transmission scheme, the DMRS port is determined based on the second field, and the number of the first layer and the number of the second layer of the first transmission scheme are determined based on the correspondence between the DMRS port and the number of layers.

[0199] In some implementations, the first indicator field is determined under the condition that the first number of layers is known, and the second indicator field is determined under the condition that the second number of layers is known.

[0200] In some implementations, the bit width of the first indication field is equal to the maximum bit width of the first indication field in the first transmission scheme and the second transmission scheme.

[0201] In some implementations, the bit width of the first indication field in the first transmission scheme is less than or equal to the bit width of the first indication field in the second transmission scheme.

[0202] In some implementations, the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme, and / or the bit width of the second instruction field is equal to the bit width of the first instruction field.

[0203] In some implementations, the bit width of the second field is equal to the maximum bit width of the second field in the first and second transmission schemes.

[0204] In some implementations, the bit width of the second field in the first transmission scheme is less than or equal to the bit width of the second field in the second transmission scheme.

[0205] In some implementations, the first instruction field indicates transmission parameters of a first panel or a first SRS resource set, and / or the second instruction field indicates transmission parameters of a second panel or a second SRS resource set.

[0206] In some implementations, the first indication field is a first TPMI field or a first SRI field, and / or the second indication field is a second TPMI field or a second SRI field, and the second field is an antenna port field.

[0207] In some implementations, when transmitting codebook-based uplink data, the first indication field is a first TPMI field and / or the second indication field is a second TPMI field, and when transmitting non-codebook-based uplink data, the first indication field is a first SRI field and / or the second indication field is a second SRI field.

[0208] In some implementations, when transmitting codebook-based uplink data in an SFN scheme, the number of layers and the TPMI are determined based on the first TPMI field, the second TPMI field is reserved or not present, and the DMRS port is determined based on the number of layers and the antenna port field.

[0209] In some implementations, the downlink control information includes two SRS resource indicator (SRI) fields, among which the two SRS resource indicator fields indicate the same number of SRS ports for the two SRS resources.

[0210] The above-described embodiments are provided to exemplify the present invention, but the present invention is not limited to these, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or a plurality of the above-described embodiments may be used in combination.

[0211] Although only the components or modules according to the present invention have been described above, the present invention is not limited thereto. The uplink data transmission device 1000 may further include other components or modules, and reference can be made to related art for specific details of these components or modules.

[0212] 10 shows only the connection relationships or signal directions between each component or module for convenience, but as will be understood by those skilled in the art, various related technologies such as bus connections may be employed. Each of these components or modules may be realized by hardware such as a processor, memory, transmitter, or receiver, but the implementation of the present invention is not limited to these.

[0213] As can be seen from the above embodiment, the terminal device can determine the number of layers and DMRS ports according to the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible indication of parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission.

[0214] <Example of the fourth aspect> In an embodiment of the present invention, an uplink data receiving device is provided. The device may be, for example, a network device, or may be one or more components or assemblies provided in the network device. Note that, here, descriptions of the same content as in the embodiments of the first to third aspects will be omitted.

[0215] 11 is a diagram illustrating an uplink data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 11, an uplink data receiving apparatus 1100 includes: A transmitting unit 1101: for transmitting downlink control information; and A receiving unit 1102 receives uplink data transmitted through a first transmission scheme or a second transmission scheme, in which a terminal device determines the number of layers and DMRS ports according to the downlink control information, and transmits the uplink data through the first transmission scheme or the second transmission scheme, in which a first SRS resource set and a second SRS resource set are configured in the terminal device.

[0216] The above-described embodiments are provided to exemplify the present invention, but the present invention is not limited to these, and appropriate modifications can be made based on the above-described embodiments. For example, each of the above-described embodiments may be used alone, or a plurality of the above-described embodiments may be used in combination.

[0217] Although only the components or modules according to the present invention have been described above, the present invention is not limited thereto. The uplink data receiving device 1100 may further include other components or modules, and reference can be made to related art for specific details of these components or modules.

[0218] 11 shows only the connection relationships or signal directions between each component or module, but as will be understood by those skilled in the art, various related technologies such as bus connections may be employed. Each of these components or modules may be realized by hardware such as a processor, memory, transmitter, or receiver, but the implementation of the present invention is not limited to these.

[0219] As can be seen from the above embodiment, the terminal device can determine the number of layers and DMRS ports according to the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible indication of parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Furthermore, the terminal device can transmit uplink data using appropriate uplink transmission parameters, thereby ensuring the throughput or reliability of uplink data transmission.

[0220] <Example of the fifth aspect> An embodiment of the present invention further provides a communication system, for example, see Fig. 1. Note that the description of the same contents as those in the first to fourth aspects will be omitted here.

[0221] In some embodiments, the communication system 100 includes at least the following: A network device that transmits downlink control information; and A terminal device: a first SRS resource set and a second SRS resource set are configured, and the terminal device determines the number of layers and the DMRS port according to the downlink control information, and transmits the uplink data using the first transmission scheme or the second transmission scheme; The network device receives the uplink data transmitted in the first transmission scheme or the second transmission scheme.

[0222] In the embodiment of the present invention, a network device is further provided, which may be, for example, a base station, but the present invention is not limited thereto and may be other network devices.

[0223] 12 is a block diagram of a network device according to an embodiment of the present invention. As shown in FIG. 12, the network device 1200 may include a processor 1210 (e.g., a central processing unit (CPU)) and a memory 1220, which is connected to the processor 1210. The memory 1220 can store various data and can also store a program 1230 for information processing, and can execute the program 1230 under the control of the processor 1210.

[0224] 12, the network device 1200 may further include a transceiver 1240, an antenna 1250, etc., the functions of which are the same as those of the prior art, and detailed description thereof will be omitted here. Note that the network device 1200 does not need to include all the components shown in Fig. 12. The network device 1200 may further include components not shown in Fig. 12, and for this, reference can be made to the prior art.

[0225] In the embodiment of the present invention, a terminal device is further provided, but the present invention is not limited thereto and may be other devices.

[0226] 13 is a diagram illustrating a terminal device according to an embodiment of the present invention. As shown in FIG. 13, the terminal device 1300 may include a processor 1310 and a memory 1320, where the memory 1320 stores data and programs and is connected to the processor 1310. Note that this diagram is merely an example, and other types of components may be used to supplement or replace this component to achieve telecommunications or other functions.

[0227] For example, the processor 1310 may be configured to execute a program to implement the uplink data transmission method described in the embodiments of the first aspect. For example, the processor 1310 may be configured to perform the following control: configure a first SRS resource set and a second SRS resource set, receive downlink control information, determine the number of layers and DMRS ports based on the downlink control information, and transmit uplink data using the first transmission scheme or the second transmission scheme.

[0228] As shown in Fig. 13, the terminal device 1300 may further include a communication module 1330, an input unit 1340, a display 1350, a power supply 1360, etc. The functions of these components are the same as those of the prior art, and detailed descriptions thereof will be omitted here. It should be noted that the terminal device 1300 does not need to include all the components shown in Fig. 13. The terminal device 1300 may also include components not shown in Fig. 13, and reference can be made to the prior art for such components.

[0229] An embodiment of the present invention further provides a computer program, which, when executed in a terminal device, causes the terminal device to perform the uplink data transmission method described in the embodiment of the first aspect.

[0230] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the uplink data transmission method described in the embodiment of the first aspect.

[0231] An embodiment of the present invention further provides a computer program, which, when executed by a terminal device, causes the terminal device to perform the uplink data reception method described in an embodiment of the second aspect.

[0232] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the uplink data receiving method described in the embodiment of the second aspect.

[0233] The above-described devices and methods may be realized by software or hardware, or by a combination of hardware and software. The present invention further relates to a computer-readable program as described below, which, when executed by a logic component, causes the logic component to realize the above-described devices or components, or to perform each of the above-described methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, or a processing unit used in a computer. The present invention also relates to a storage medium, such as a hard disk, magnetic disk, optical hard disk, DVD, or flash memory, that stores the above-described program.

[0234] Furthermore, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be implemented as a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic component, a discrete gate or transistor logic component, a discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be further implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors communicatively coupled with a DSP, or any other configuration.

[0235] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and any modifications to the present invention that do not depart from the spirit of the present invention fall within the technical scope of the present invention.

[0236] Furthermore, the following additional notes are disclosed regarding the above-described embodiments.

[0237] (Appendix 1) An uplink data transmission method, applied to a terminal device, comprising: A first SRS resource set and a second SRS resource set are configured in the terminal device, The method comprises: The terminal device receives downlink control information; and determining a number of layers and a DMRS port based on the downlink control information, and transmitting uplink data using a first transmission scheme or a second transmission scheme.

[0238] (Appendix 2) 2. The method of claim 1, comprising: the first transmission scheme comprises an SDM scheme; the second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme; the downlink control information includes a first field and a second field; The method, wherein the first field includes a first instruction field and / or a second instruction field.

[0239] (Appendix 3) 10. The method of claim 2, When transmitting the uplink data in the first transmission scheme, determine a first layer number according to the first indication field and determine a second layer number according to the second indication field; the number of the first layers and the number of the second layers are the same or different, determining the DMRS port based on the sum of the first layer number and the second layer number and the second field.

[0240] (Appendix 4) 4. The method of claim 3, Among the at least two DMRS ports, a first portion of the DMRS ports belong to a first CDM group and a second portion of the DMRS ports belong to a second CDM group; the layer number or the first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and the second layer number or the second SRS resource set is associated with the second CDM group and the DMRS ports included therein; The first CDM group is a CDM group to which a first DMRS port of the at least two DMRS ports belongs.

[0241] (Appendix 5) 5. The method of claim 4, The method, wherein the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0242] (Appendix 6) 10. The method of claim 2, When transmitting the uplink data in the first transmission scheme, determine a first layer number according to the first indication field, determine a second layer number according to the second indication field, and the first layer number and the second layer number are the same or different; determining the DMRS port based on a correspondence relationship between the number of the first layer, the number of the second layer, and the DMRS port; The second field is reserved.

[0243] (Appendix 7) 7. The method of any one of appendices 3 to 6, comprising: A method wherein the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme.

[0244] (Appendix 8) 8. The method of claim 7, A method, wherein the bit width of the second indication field in the first transmission scheme is equal to or greater than the bit width of the second indication field in the second transmission scheme.

[0245] (Appendix 9) 7. The method of any one of appendices 3 to 6, comprising: A method wherein the bit width of the second instruction field is equal to the bit width of the first instruction field.

[0246] (Appendix 10) 10. The method of claim 2, determining the DMRS port based on the second field when transmitting the uplink data in the first transmission scheme; determining the number of first layers and the number of second layers of the first transmission scheme based on a correspondence relationship between the DMRS ports and the number of layers.

[0247] (Appendix 11) 11. The method of claim 10, The method, wherein the first indication field is determined under a condition where the number of layers is known, and the second indication field is determined under a condition where the number of layers is known.

[0248] (Appendix 12) 12. The method according to claim 10 or 11, A method wherein the bit width of the first instruction field is equal to the maximum bit width of the first instruction field in the first transmission scheme and the second transmission scheme.

[0249] (Appendix 13) 13. The method of claim 12, A method, wherein a bit width of the first indication field in the first transmission scheme is equal to or less than a bit width of the first indication field in the second transmission scheme.

[0250] (Appendix 14) 12. The method according to claim 10 or 11, the bit width of the second indication field is equal to the maximum bit width of the second indication field in the first transmission scheme and the second transmission scheme; and / or A method wherein the bit width of the second instruction field is equal to the bit width of the first instruction field.

[0251] (Appendix 15) 12. The method according to claim 10 or 11, A method wherein a bit width of the second field is equal to a maximum bit width of the second field in the first transmission scheme and the second transmission scheme.

[0252] (Appendix 16) 16. The method of claim 15, A method wherein the bit width of the second field in the first transmission scheme is equal to or less than the bit width of the second field in the second transmission scheme.

[0253] (Appendix 17) 17. The method according to any one of appendices 2-16, comprising: the first indication field indicates transmission parameters of a first panel or the first SRS resource set; and / or The second indication field indicates transmission parameters of a second panel or the second SRS resource set.

[0254] (Appendix 18) The method according to any one of appendices 2-17, comprising: the first indication field is a first TPMI field or a first SRI field; and / or the second indication field is a second TPMI field or a second SRI field; The method, wherein the second field is an antenna port field.

[0255] (Appendix 19) 19. The method of claim 18, When transmitting codebook-based uplink data, the first indication field is a first TPMI field, and / or the second indication field is a second TPMI field; and A method, wherein when transmitting non-codebook based uplink data, the first indication field is a first SRI field and / or the second indication field is a second SRI field.

[0256] (Appendix 20) 19. The method of claim 18, When transmitting codebook-based uplink data in the SFN scheme, determining the number of layers and the TPMI based on the first TPMI field, and the second TPMI field is reserved or does not exist; and determining the DMRS port based on the layer number and the antenna port field.

[0257] (Appendix 21) 21. The method of claim 20, The downlink control information includes two SRS resource indicator (SRI) fields, in which the two SRS resource indicator fields indicate the same number of SRS ports for the two SRS resources.

[0258] (Appendix 22) An uplink data reception method, applied to a network device, comprising: The method comprises: The network device transmits downlink control information; and receiving uplink data transmitted in a first transmission scheme or a second transmission scheme by the network device; a terminal device determines the number of layers and DMRS ports based on the downlink control information, and transmits the uplink data using the first transmission scheme or the second transmission scheme, wherein a first SRS resource set and a second SRS resource set are configured in the terminal device.

[0259] (Appendix 23) A terminal device, a memory and a processor; A terminal device, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method according to any one of appendices 1 to 21.

[0260] (Appendix 24) A network device, a memory and a processor; A network device, wherein the storage device stores a computer program, and the processor is configured to execute the computer program to implement the method described in Appendix 22.

[0261] (Appendix 25) 1. A communication system comprising: a network device for transmitting downlink control information; The terminal device further includes a terminal device configured with a first SRS resource set and a second SRS resource set, determining a number of layers and a DMRS port according to the downlink control information, and transmitting the uplink data in a first transmission scheme or a second transmission scheme; A communication system, wherein the network equipment receives the uplink data transmitted in the first transmission scheme or the second transmission scheme.

Claims

1. An apparatus for transmitting uplink data, disposed in a terminal device, comprising: A first SRS resource set and a second SRS resource set are configured in the terminal device, The device comprises: a receiver for receiving downlink control information; and a transmitter that determines a number of layers and a DMRS port based on the downlink control information, and transmits uplink data using a first transmission scheme or a second transmission scheme; the downlink control information includes a second field, and the downlink control information includes a first indication field and / or a second indication field; When transmitting the uplink data in the first transmission scheme, determine a first layer number according to the first indication field, determine a second layer number according to the second indication field, and determine the DMRS port according to the sum of the first layer number and the second layer number and the second field; The apparatus, wherein the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme.

2. 10. The apparatus of claim 1, the first transmission scheme comprises a spatial division multiplexing scheme; The apparatus, wherein the second transmission scheme includes one of a single transmission / reception point scheme, a multi-transmission point scheme, a frequency division multiplexing scheme, and a single frequency network scheme.

3. 10. The apparatus of claim 1, The number of first layers and the number of second layers are the same, or the number of first layers and the number of second layers are different.

4. 10. The apparatus of claim 1, Among the at least two DMRS ports, a first portion of the DMRS ports belong to a first CDM group, and a second portion of the DMRS ports belong to a second CDM group; the layer number or the first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and the second layer number or the second SRS resource set is associated with the second CDM group and the DMRS ports included therein; The first CDM group is a CDM group to which a first DMRS port of the at least two DMRS ports belongs.

5. 5. The apparatus of claim 4, The device, wherein the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

6. 3. The apparatus of claim 2, When transmitting the uplink data in the first transmission scheme, determine a first layer number according to the first indication field, and determine a second layer number according to the second indication field, and the first layer number and the second layer number are the same or different; Determine the DMRS port based on a correspondence relationship between the number of first layers, the number of second layers, and the DMRS port; The second field is reserved.

7. 10. The apparatus of claim 1, The apparatus, wherein the bit width of the second instruction field in the first transmission scheme is equal to or greater than the bit width of the second instruction field in the second transmission scheme.

8. 10. The apparatus of claim 1, The bit width of the second instruction field is equal to the bit width of the first instruction field.

9. 3. The apparatus of claim 2, When transmitting the uplink data in the first transmission scheme, determining the DMRS port according to the second field; determining the number of first layers and the number of second layers of the first transmission scheme based on a correspondence relationship between the DMRS port and the number of layers.

10. 9. The apparatus of claim 8, The first indication field is determined under a condition where the number of layers is known, and the second indication field is determined under a condition where the number of layers is known.

11. 10. The apparatus of claim 9, a bit width of the first instruction field is equal to a maximum bit width of the first instruction field in the first transmission scheme and the second transmission scheme; The apparatus, wherein the bit width of the first instruction field in the first transmission scheme is equal to or less than the bit width of the first instruction field in the second transmission scheme.

12. 10. The apparatus of claim 9, the bit width of the second indication field is equal to the maximum bit width of the second indication field in the first transmission scheme and the second transmission scheme; and / or The bit width of the second instruction field is equal to the bit width of the first instruction field.

13. 10. The apparatus of claim 9, The apparatus, wherein the bit width of the second field is equal to the maximum bit width of the second field in the first transmission scheme and the second transmission scheme.

14. 14. The apparatus of claim 13, The apparatus, wherein the bit width of the second field in the first transmission scheme is equal to or less than the bit width of the second field in the second transmission scheme.

15. 3. The apparatus of claim 2, The first indication field indicates transmission parameters of a first panel or the first SRS resource set; and / or The second instruction field indicates transmission parameters of a second panel or the second SRS resource set.

16. 3. The apparatus of claim 2, the first indication field is a first TPMI field or a first SRI field; and / or the second indication field is a second TPMI field or a second SRI field; The device, wherein the second field is an antenna port field.

17. 17. The apparatus of claim 16, When transmitting codebook-based uplink data, the first indication field is a first TPMI field and / or the second indication field is a second TPMI field; When transmitting non-codebook-based uplink data, the first indication field is a first SRI field and / or the second indication field is a second SRI field.

18. 18. The apparatus of claim 17, When transmitting codebook-based uplink data in the single-frequency network scheme, determining the number of layers and the TPMI based on the first TPMI field, and the second TPMI field is reserved or does not exist; The apparatus determines the DMRS port based on the layer number and the antenna port field.

19. 19. The apparatus of claim 18, The downlink control information includes two SRS resource indication fields, and the two SRS resources indicated by the two SRS resource indication fields have the same number of SRS ports.

20. A device for receiving uplink data, disposed in a network device, comprising: a transmitter for transmitting downlink control information; and a receiver for receiving uplink data transmitted in the first transmission scheme or the second transmission scheme; a terminal device determines a number of layers and a DMRS port according to the downlink control information, and transmits the uplink data using the first transmission scheme or the second transmission scheme, a first SRS resource set and a second SRS resource set are configured in the terminal device; the downlink control information includes a second field, and the downlink control information includes a first indication field and / or a second indication field; When transmitting the uplink data in the first transmission scheme, determine a first layer number according to the first indication field, determine a second layer number according to the second indication field, and determine the DMRS port according to the sum of the first layer number and the second layer number and the second field; The apparatus, wherein the bit width of the second instruction field is equal to the maximum bit width of the second instruction field in the first transmission scheme and the second transmission scheme.

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