Uplink data transmission device and method, and uplink data reception device and method

Abstract

The embodiment of the invention provides an uplink data sending device and method and an uplink data receiving device and method. The uplink data sending method is applied to the terminal device, the terminal device is configured with a first SRS resource set and a second SRS resource set, and the method comprises the steps that the terminal device receives downlink control information, determines the number of layers and DMRS ports according to the downlink control information, and sends uplink data through a first transmission scheme or a second transmission scheme. Therefore, the terminal device determines the number of layers and the DMRS port according to the received downlink control information, and sends uplink data according to a specific transmission scheme. Therefore, flexible indication of parameters such as the number of layers and DMRS ports can be realized, and dynamic switching among different transmission schemes can be supported; and the terminal equipment can send the uplink data by using the appropriate uplink sending parameters, so that the throughput or reliability of uplink data sending is ensured.

Description

Uplink data sending and receiving device and method Technical Field

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

[0002] During the standardization process of Release 17 (Rel-17), the 3GPP standardization organization carried out standardization work on the unified transmission configuration indication (TCI). The unified TCI in Rel-17 is designed primarily for the sTRP (single transmission and reception point) scenario.

[0003] With the advancement of standardization, multiple transmission and reception point (mTRP) has become an important scenario in 5G NR systems. Through mTRP-based transmission, the goal of improving throughput or reliability can be achieved.

[0004] In previous standardization work, the transmission of the Physical Downlink Shared Channel (PDSCH) based on mTRP was standardized in Rel-16; and the transmission of the Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH) based on mTRP were standardized in Rel-17. Among them, 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 above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of this application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are explained in the background technology part of this application.

[0006] Summary of the Invention

[0007] In the Rel-17 unified TCI scenario for sTRP (single transmission and reception point), the network device uses RRC signaling to configure M (M ≥ 1) TCI states for the terminal device, uses the medium access control (MAC) control element (CE) to activate N (1 ≤ N ≤ M) TCI states in the M TCI states, and uses downlink control information (DCI) to indicate L (1 ≤ L ≤ N) TCI states in the N TCI states. Among them, the transmission configuration indication (TCI) field of DCI format 1_1 or DCI format 1_2 indicates one or more TCI states. In addition, DCI format 1_1 or DCI format 1_2 can schedule downlink data, which is called DCI format 1_1 / 1_2 with DL assignment, or it can not schedule downlink data, which is called DCI format 1_1 / 1_2 without DL assignment.

[0008] A TCI state (TCI for short) 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, Quasi Co-Location) 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 transmit spatial filter (UL TX spatial filter, uplink transmission spatial filter), and is referred to as an uplink source reference signal. The source reference signal may provide beam information for the destination channel / signal. For example, the beam used by the terminal device to receive the destination channel / signal is the same as the beam used to receive the downlink source reference signal. For another example, the beam used by the terminal device to send the destination channel / signal is the same as the beam used to send the uplink source reference signal. For another example, the beam used by the terminal device to send the destination channel / signal and the beam used to receive the downlink source reference signal are reciprocal, that is, beams in opposite directions are used.

[0009] Therefore, the indication or update of the TCI state actually also includes the indication or update of 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 contained in the downlink TCI state is a downlink source reference signal, and the source reference signal contained in the uplink TCI state is an uplink source reference signal. The source reference signal contained in the joint TCI state is both a downlink source reference signal and an uplink source reference signal. The joint TCI state acts on both 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, that is, there is reciprocity between the uplink and downlink beams. The downlink TCI state only acts on the downlink beam. The uplink TCI state only acts on 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 a downlink TCI state and / or an uplink TCI state (separate DL / UL TCI). These two modes can be configured through RRC signaling. For Rel-17 unified TCI, a TCI field indicates a joint TCI state, a downlink TCI state, an uplink TCI state, or a downlink TCI state and an uplink TCI state.

[0010] Multiple TRPs (mTRP, multiple transmission and reception point) are an important scenario in the 5G NR system. Through transmission based on mTRP, the purpose of improving throughput or improving reliability can be achieved. Rel-16 standardized PDSCH transmission based on mTRP, and Rel-17 standardized PDCCH, PUSCH, and PUCCH transmission based on mTRP. In addition, the current mTRP transmission in Rel-17 includes mTRP transmission based on sDCI (single DCI) and mTRP transmission based on mDCI (multiple DCI). For sDCI mTRP, one DCI schedules the uplink and downlink transmissions of two TRPs, which is more suitable for situations where the backhaul between TRPs is relatively ideal; for mDCI mTRP, two TRPs use two DCIs to schedule the uplink and downlink transmissions of their respective TRPs, which is more suitable for situations where the backhaul between TRPs is not ideal.

[0011] However, the inventors discovered that for Rel-17, a terminal device only uses one panel for each uplink transmission. Therefore, even if a terminal device has multiple panels, Rel-17 does not support the terminal device using multiple panels for simultaneous uplink transmission. Currently, the standardization work for Rel-18 has not yet officially begun, but simultaneous multi-panel uplink transmission has been identified as one of the project contents of Rel-18. That is, based on the unified TCI framework and mTRP scenario described above, Rel-18 will study and standardize the simultaneous multi-panel UL transmission (STxMP) solution for terminal devices.

[0012] For the STxMP scheme, it may include different specific transmission schemes. In the sDCI mTRP scenario, a DCI needs to indicate the number of layers, precoding matrix and DMRS port used by multiple panels, that is, the number of layers, precoding matrix and DMRS port used for multiple transmissions. Although in the Rel-17 time division multiplexing-based mTRP PUSCH scheme, a DCI can indicate the number of layers and precoding matrix used for multiple transmissions, the indication is limited to the premise that the same number of layers is used for multiple transmissions, and the DMRS port used for multiple transmissions is the same. However, for some transmission schemes in the STxMP scheme, multiple transmissions from multiple panels can use different numbers of layers and different DMRS ports. Therefore, the indication method in the mTRP scheme of Rel-17 will not be able to be directly reused in the STxMP scheme of Rel-18.

[0013] Therefore, how to indicate parameters such as the number of layers, precoding matrix, and DMRS ports for a specific transmission scheme in the STxMP scheme remains an open problem.

[0014] To address at least one of the above-mentioned issues, embodiments of the present application provide a method and apparatus for transmitting and receiving uplink data. A terminal device determines the number of layers and DMRS ports based on received downlink control information, and transmits uplink data using a specific transmission scheme. This allows for 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0015] According to another aspect of an embodiment of the present application, a method for transmitting uplink data is provided, applied to a terminal device, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set), the method comprising:

[0016] The terminal device receives downlink control information,

[0017] The number of layers and the DMRS port are determined according to the downlink control information, and uplink data is sent using the first transmission scheme or the second transmission scheme.

[0018] According to another aspect of an embodiment of the present application, a method for receiving uplink data is provided, which is applied to a network device, and the method includes:

[0019] The network device sends downlink control information,

[0020] The network device receives uplink data sent using the first transmission scheme or the second transmission scheme;

[0021] The terminal device determines the number of layers and DMRS ports according to the downlink control information, and sends the uplink data using the first transmission scheme or the second transmission scheme, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

[0022] According to another aspect of an embodiment of the present application, an uplink data transmitting apparatus is provided, configured in a terminal device, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set), and the uplink data transmitting apparatus includes:

[0023] a receiving unit, which receives downlink control information,

[0024] A sending unit is configured to determine the number of layers and the DMRS port according to the downlink control information, and to send uplink data using the first transmission scheme or the second transmission scheme.

[0025] According to another aspect of an embodiment of the present application, there is provided an uplink data receiving apparatus, configured in a network device, the uplink data receiving apparatus comprising:

[0026] A sending unit, which sends downlink control information,

[0027] a receiving unit configured to receive uplink data sent using the first transmission scheme or the second transmission scheme;

[0028] The terminal device determines the number of layers and DMRS ports according to the downlink control information, and sends the uplink data using the first transmission scheme or the second transmission scheme, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

[0029] One of the beneficial effects of the embodiments of the present application is that a terminal device determines the number of layers and DMRS ports based on received downlink control information and transmits uplink data using a specific transmission scheme. This allows for 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0030] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0031] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0032] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0034] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0035] FIG2 is a schematic diagram of a method for transmitting uplink data according to an embodiment of the present application;

[0036] FIG3 is an example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application;

[0037] FIG4 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application;

[0038] FIG5 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application;

[0039] FIG6 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application;

[0040] FIG7 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application;

[0041] FIG8 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application;

[0042] FIG9 is a schematic diagram of a method for receiving uplink data according to an embodiment of the present application;

[0043] FIG10 is a schematic diagram of an uplink data transmitting device according to an embodiment of the present application;

[0044] FIG11 is a schematic diagram of an uplink data receiving device according to an embodiment of the present application;

[0045] FIG12 is a schematic diagram of the structure of a network device according to an embodiment of the present application;

[0046] FIG13 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0048] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0049] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0050] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0051] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), etc., and / or other communication protocols currently known or to be developed in the future.

[0052] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0053] Base stations may include, but are not limited to, NodeB (NB), evolved NodeB (eNodeB or eNB), and 5G base stations (gNB), among others. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femeto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0054] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0055] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0056] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0057] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0058] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0059] Figure 1 is a schematic diagram of a communication system according to an embodiment of the present application, illustrating a situation using a terminal device and a network device as an example. As shown in Figure 1 , communication system 100 may include a first TRP 101, a second TRP 102, and a terminal device 103. The first TRP 101 and the second TRP 102 may be network devices. For simplicity, Figure 1 illustrates only two network devices and one terminal device as an example, but the embodiments of the present application are not limited thereto.

[0060] In the embodiment of the present application, existing services or future services can be transmitted between the first TRP 101, the second TRP 102, and the terminal device 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0061] Rel-16 standardized PDSCH transmission based on mTRP, and Rel-17 standardized PDCCH, PUSCH, and PUCCH transmission based on mTRP. mTRP transmission includes mTRP transmission based on sDCI (single DCI) and mTRP transmission based on mDCI (multiple DCI). For sDCI mTRP, one DCI schedules the uplink and downlink transmissions of two TRPs, which is more suitable for situations where the backhaul between TRPs is ideal. For mDCI mTRP, two TRPs use two DCIs to schedule the uplink and downlink transmissions of their respective TRPs, which is more suitable for situations where the backhaul between TRPs is not ideal.

[0062] Taking the terminal device 103 transmitting PUSCH in the mTRP scenario as an example, as shown in Figure 1, the terminal device 103 transmits PUSCH in a PUSCH repetition manner. For example, it transmits to the first TRP 101 in time slot 1, transmits to the second TRP 102 in time slot 2, and so on.

[0063] In the mTRP scenario, the terminal device is configured with two SRS resource sets (SRS resource set), corresponding to two TRPs respectively. For example, the terminal device is configured with two SRS resource sets (SRS resource set), for example, the first SRS resource set (1st SRS resource set) corresponding to the first TRP101 is configured for the terminal device 103; and the second SRS resource set (2nd SRS resource set) corresponding to the second TRP102 is configured for the terminal device 103.

[0064] Due to the geographical differences between the first TRP 101 and the second TRP 102, the terminal device may send PUSCH to the first TRP 101 and / or the second TRP 102 based on different transmission parameters such as precoding matrices, SRIs (SRS resource indicators), and power control parameters. In addition, the terminal device obtains the 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.

[0065] Taking the SRS resource indicator (SRI) as an example, for a dynamic uplink grant, the two SRI fields in the DCI indicate the SRS resources in two SRS resource sets respectively; for a configured grant, the two SRIs are configured by RRC to two SRS resource sets. Therefore, the terminal device needs to know the mapping relationship between PUSCH repetition and SRS resource set, that is, to know which SRS resource set each PUSCH repetition should be sent based on.

[0066] However, Rel-18 will study and standardize the simultaneous multi-panel UL transmission (STxMP) scheme for terminal devices. For example, in the sDCI mTRP scenario, one DCI may need to indicate the number of layers, precoding matrix and DMRS ports used by multiple panels, that is, one DCI indicates the number of layers, precoding matrix and DMRS ports used for multiple transmissions. Although in the Rel-17 mTRP PUSCH scheme based on time division multiplexing, one DCI can indicate the number of layers and precoding matrix used for multiple transmissions, the indication is limited to the premise that the same number of layers is used for multiple transmissions, and the DMRS ports used for multiple transmissions are the same. However, for some transmission schemes in the STxMP scheme, multiple transmissions from multiple panels can use different numbers of layers and different DMRS ports. Therefore, the indication method in the mTRP scheme of Rel-17 will not be directly reused in the STxMP scheme of Rel-18.

[0067] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for sending and receiving uplink data.

[0068] Embodiments of the first aspect

[0069] An embodiment of the present application provides an uplink data sending method, which is applied to a terminal device side. The terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

[0070] FIG2 is a schematic diagram of a method for sending uplink data according to an embodiment of the present application. As shown in FIG2 , the method includes:

[0071] 201, the terminal device receives downlink control information,

[0072] 202. Determine the number of layers and the DMRS port according to the downlink control information, and send uplink data using the first transmission scheme or the second transmission scheme.

[0073] It is worth noting that FIG2 above merely illustrates an embodiment of the present application, using a terminal device as an example, but the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, other operations may be added or some operations may be removed, and the objects of the aforementioned operations may be adjusted. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description in FIG2 above.

[0074] In some embodiments, the terms "TRP" and "SRS resource set" can be replaced with each other. The terms "TRP" and "CSI-RS resource set" can be replaced with each other. The terms "corresponding", "associated", and "including" can be replaced with each other, and the terms "uplink TCI state" and "joint TCI state" can be replaced with each other. The terms "PUSCH", "PUSCH transmission", and "PUSCH transmission" can be replaced with each other; "TPMI" refers to the information indicated by the "Precoding information and number of layers" field or the "Second Precoding information" field in the DCI, including precoding matrix information and number of layers information. The above field can be referred to as the "TPMI field"; the above is only an exemplary description, and the embodiments of the present application are not limited to this.

[0075] Thus, 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. This enables 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0076] In some embodiments, the first transmission scheme includes an SDM scheme; the second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, or an SFN scheme.

[0077] For example, the STxMP scheme in Rel-18 may include one of a space division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a single-frequency network (SFN) scheme.

[0078] For example, for the SDM scheme, it means that at least two panels send different layers simultaneously on the same time-frequency resources, for example, panel 1 sends layer 1 and layer 2, and panel 2 sends layer 3; for the FDM scheme, it means that at least two panels send simultaneously on different frequency resources, sending two different parts of a PUSCH, or sending two PUSCH repetitions of a PUSCH; for the SFN scheme, it means that at least two panels send the same data simultaneously on the same time-frequency resources.

[0079] For example, the sTRP scheme and mTRP scheme in the embodiments of the present application refer to the sTRP PUSCH transmission scheme and mTRP PUSCH transmission scheme in Rel-17, and are not repeated here.

[0080] In some embodiments, downlink control information may also be referred to as an uplink grant (UL grant) or downlink control information (UL downlink control information, UL DCI) for scheduling uplink. The downlink control information may include multiple fields, for example, a first field and a second field; wherein the first field includes a first indication field and / or a second indication field.

[0081] For example, the first indication field indicates a transmission parameter of a first panel or a first SRS resource set; and / or the second indication field indicates a transmission parameter of a second panel or a second SRS resource set.

[0082] In some embodiments, the first indication field is a first uplink precoding index (transmit precoding matrix indicator, TPMI) field or a first SRS resource indicator (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 (SRS resource indicator, SRI) field; the second field is an antenna ports field.

[0083] In some embodiments, when codebook-based uplink data is transmitted, the first indication field is a first TPMI field, and / or the second indication field is a second TPMI field; and when non-codebook-based uplink data is transmitted, the first indication field is a first SRI field, and / or the second indication field is a second SRI field. For example, the difference between codebook-based PUSCH transmission and non-codebook-based PUSCH transmission is that, for non-codebook-based PUSCH transmission, the TPMI does not need to be indicated, which can also be expressed as the absence of a TPMI field in the downlink control information. The transmission of codebook-based uplink data and non-codebook-based uplink data will be described below with examples.

[0084] In some embodiments, when uplink data is transmitted using a first transmission scheme, a first layer number is determined based on a first indicator field, a second layer number is determined based on a second indicator field, wherein 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. The following examples illustrate the transmission of codebook-based uplink data and non-codebook-based uplink data.

[0085] The following description is given by taking codebook based PUSCH transmission as an example.

[0086] In some embodiments, 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; the bit width of the second indication field in the first transmission scheme is greater than or equal to the bit width of the second indication field in the second transmission scheme; the bit width of the second indication field is equal to the bit width of the first indication field.

[0087] Figure 3 is an example diagram for determining the number of layers and DMRS ports according to an embodiment of the present application. For example, the first indication field is the first TPMI field, the second indication field is the second TPMI field, and the second field is the antenna ports field; for example, the first transmission scheme is the SDM scheme, and the second transmission scheme includes one of the sTRP scheme, the mTRP scheme, the FDM scheme, or the SFN scheme. Figure 3 uses the sTRP scheme and the mTRP scheme as examples.

[0088] As shown in Figure 3, the first TPMI and the first number of layers (L1) are determined according to the first TPMI field of the DCI, the second TPMI and the second number of layers (L1) are determined according to the second TPMI field of the DCI, the bit width of the second TPMI field is determined according to the maximum bit width required by more than one scheme, and the DMRS port is determined according to the sum of L1 and L2 and the antenna ports field.

[0089] Figure 3 illustrates this schematically. For the SDM scheme, the first TPMI and the first layer number (L1) are indicated by the first TPMI field of the DCI, while the second TPMI and the second layer number (L2) are indicated by the second TPMI field of the DCI. Alternatively, the above information is independently indicated by two TPMI fields, so the bit width of the second TPMI field is equal to the bit width of the first TPMI field. As shown in Figure 3, for the mTRP scheme, due to the restriction that L2 = L1, that is, the second TPMI is indicated only when L2 is known, the second TPMI field does not need to indicate L2-related information, and the bit width of the second TPMI field can be smaller than the bit width of the first TPMI field. Furthermore, for the sTRP scheme, there is no need to indicate the second TPMI, so the second TPMI field is reserved and unused.

[0090] Therefore, in order to support dynamic switching between the SDM scheme, the sTRP scheme, and the mTRP scheme, it is necessary to ensure that the bit width of the field in the DCI is the same for the SDM scheme, the sTRP scheme, and the mTRP scheme. That is, 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 of the SDM scheme, which is also equal to the bit width of the first TPMI field. For a specific transmission scheme, if the actual bit width is smaller than the above-determined second TPMI field width (for example, the mTRP scheme), the actual bit width is padded to make it equal to the above-determined second TPMI field width.

[0091] The following example illustrates a method for determining the bit widths of the first TPMI field and the second TPMI field.

[0092] In some embodiments, the first layer number (L1) and the second layer number (L2) are determined according to the first TPMI field and the second TPMI field of the DCI, respectively.

[0093] For example, for the SDM scheme, the first TPMI and the first layer number (L1) are determined based on the first TPMI field. The bit width (number of bits) and meaning of the first TPMI field are shown in Table 1 below (also referred to as "Table 7.3.1.1.2-2"). Furthermore, the second TPMI and the second layer number (L2) are determined based on the second TPMI field. The bit width and meaning of the second TPMI field are also shown in Table 1 below (also referred to as "Table 7.3.1.1.2-2").

[0094] In addition, a tuple consisting of the first layer number and the second layer number can be expressed as (L1, L2), and the value of the tuple satisfies the following conditions: the tuple is one of (1, 1), (1, 2), (2, 1), and (2, 2).

[0095] Table 1 (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

[0096]

[0097] That is, the number of bits corresponding to different codebook subset ("codebookSubset") types in Table 1 (also referred to as "Table 7.3.1.1.2-2") can be represented by Table 2 below:

[0098] Table 2

[0099]

[0100] In conjunction with the above embodiment, to support dynamic switching of multiple schemes, the bit width of the second TPMI field is determined based on the maximum bit width required by more than one scheme. For example, for the second TPMI field, the bit width required by the second transmission scheme is smaller than the bit width required by the first transmission scheme. For example, the first transmission scheme is the SDM scheme, and the second transmission scheme is one of the mTRP scheme, the FDM scheme, and the SFN scheme.

[0101] For example, for the first transmission scheme (e.g., the SDM scheme), the second TPMI field is determined according to Table 1 above (also referred to as "Table 7.3.1.1.2-2"), that is, the required bit width of the second TPMI field is as shown in Table 2; for the second transmission scheme (e.g., one of the mTRP scheme, the FDM scheme, and the SFN scheme), the second TPMI field is determined according to Table 3 below (also referred to as "Table 7.3.1.1.2-2C"), therefore, the required bit width of the second TPMI field is as shown in Table 4. Table 3 (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

[0102]

[0103] That is, the number of bits corresponding to different codebook subset ("codebookSubset") types in Table 3 (also referred to as "Table 7.3.1.1.2-2C") can be represented by the following Table 4:

[0104] Table 4

[0105]

[0106] In some embodiments, to support the terminal device to dynamically switch between the first transmission scheme and the second transmission scheme, the bit width of the second TPMI field is equal to the maximum value of the second TPMI field in the first transmission scheme and the second transmission scheme.

[0107] In some embodiments, for the second TPMI field, if the bit width required by a solution is smaller than the bit width of the second TPMI field, when the terminal device uses the solution, the most significant bit or the least significant bit of the second TPMI field is filled with '0'.

[0108] For example, for the above example, the bit width of Table 2 is larger than the bit width of Table 4, and therefore, the bit width of the second TPMI field is determined based on Table 2. For example, for a second transmission scheme, such as one of the mTRP scheme, the FDM scheme, and the 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 bit width of the determined second TPMI field (as shown in Table 2). When the terminal device uses the second transmission scheme, the most significant bit of the second TPMI field is padded with '0', and the terminal device ignores the padded bits and still determines the second TPMI based on Table 3 (also referred to as "Table 7.3.1.1.2-2C").

[0109] For example, taking the column "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 with index = 55 in the above Table 1 (also 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 the highest bit with a '0' bit. Then, the second TPMI field in the DCI indicates, for example, "011011". It still determines the rows in Table 3 (also referred to as "Table 7.3.1.1.2-2C") according to the lowest five bits, that is, the rows with index = 27 in the above Table 3 (also referred to as "Table 7.3.1.1.2-2C") are determined according to "11011". Further combined with the number of layers indicated in the first TPMI in the DCI, for example, L1 = 1, the row with index = 27 that appears for the first time can be uniquely determined.

[0110] In some embodiments, the present application does not limit how to implement dynamic switching between the first transmission scheme and the second transmission scheme. For example, the terminal device determines whether to use the first transmission scheme or the second transmission scheme based on a specific DCI field or based on specific time-frequency resources indicated by the DCI.

[0111] In some embodiments, among at least two DMRS ports, a first portion of the DMRS ports belongs to a first CDM group, a second portion of the DMRS ports belongs to a second CDM group, a first number of layers or a first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and a second number of layers 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. In some embodiments, the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0112] For example, a CDM group means that different DMRS ports can share the same time-frequency resources. For example, different DMRS ports are distinguished by using different orthogonal codes in the time and frequency domains. Different CDM groups use different time-frequency resources. In addition, the specific mapping relationship between DMRS ports and CDM groups can be referred to the relevant provisions in the existing technology and standards, and this application does not limit this.

[0113] The following describes how to determine the DMRS port.

[0114] In some embodiments, for the SDM solution, the DMRS port is determined according to the sum of L1 and L2 and the antenna ports field.

[0115] For example, for the SDM scheme, when L1 and L2 are obtained based on the aforementioned implementation, the rank of the SDM scheme is rank = L1 + L2. The antenna ports field's indication of the DMRS port depends on the rank. Rank is one of the lookup table parameters. Different ranks correspond to different DMRS port lookup tables. The antenna ports field indicates a DMRS port configuration in the lookup table.

[0116] In some embodiments, different DMRS ports belong to two CDM groups, a first part of the DMRS ports belong to a first CDM group, a second part of the DMRS ports belong to a second CDM group, a first number of layers or a first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and a second number of layers 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 among at least two DMRS ports belongs.

[0117] For example, when the 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 a DMRS port combination that can be used for the SDM scheme.

[0118] In some implementations, the first TPMI is associated with a CDM group to which a first DMRS port among the DMRS ports 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.

[0119] For example, the first DMRS port in the DMRS port is port 0, the CDM group to which it belongs is CDM group 0, and the first TPMI is associated with DMRS port 0 and CDM group 0; DMRS port 2 and DMRS port 3 belong to the second CDM group, that is, CDM group 1, therefore, the second TPMI is associated with DMRS port 2, DMRS port 3 and CDM group 1.

[0120] For example, for the 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. Table 5 can also be referred to as "Table 7.3.1.1.2-8"; Table 6 can also be referred to as "Table 7.3.1.1.2-9"; Table 7 can also be referred to as "Table 7.3.1.1.2-10"; and Table 8 can also be referred to as "Table 7.3.1.1.2-11". Tables 7.3.1.1.2-8 to 7.3.1.1.2-11 correspond to different rank values, where rank = L1 + L2. The four tables are used when the DMRS type is Type 1 (ie, dmrs-Type = 1) and the maximum length of the DMRS symbol is configured as 1 symbol (ie, maxLength = 1); for example, the table numbers of the following "Table 7.3.1.1.2-8" to "Table 7.3.1.1.2-11" are exemplary descriptions based on the current standard (e.g., relevant sections in TS38.212), and may also be adaptively modified based on updated sections of the progress of subsequent standards. This application is not limited to this; for example, for the following "Table 7.3.1.1.2-8" to "Table 7.3.1.1.2-11", the relevant rows of the following "Table 7.3.1.1.2-8" to "Table 7.3.1.1.2-11" of the current standard may be reused (e.g., for DMRS port(s) is the row corresponding to the shaded part except for the cases of 0, 2, and 3, such as the fourth row with Value = 3 in "Table 7.3.1.1.2-9"); relevant rows can also be added based on the table in the current standard (for example, the row corresponding to the shaded part for the case where DMRS port(s) is 0, 2, and 3, such as the second row with Value = 1 in "Table 7.3.1.1.2-10").

[0121] For example, for the SDM scheme, the antenna ports field can only indicate rows where the DMRS port belongs to two different CDM groups, such as the rows marked with shading in the table below, but cannot indicate other rows. Among them, L1 and L2 are determined according to the first TPMI field and the second TPMI field, respectively. 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.

[0122] For example, since L1+L2>1, the content of the table with rank=1 will not be applied, that is, in the SDM scheme, the following table "Table 7.3.1.1.2-8" will not be used; for example, as shown in the first row of "Table 7.3.1.1.2-10", the first TPMI is associated with CDM group 0 (DMRS port 0 and DMRS port 1), and the second TPMI is associated with CDM group 1 (DMRS port 2), which is also equivalent to: the first SRS resource set is associated with DMRS port 0 and DMRS port 1, and the second SRS resource set is associated with DMRS port 2; as shown in the second row of "Table 7.3.1.1.2-10", the first TPMI is associated with CDM group 0 (DMRS port 0), and the second TPMI is associated with CDM group 1 (DMRS port 2 and DMRS port 3), which is also equivalent to: the first SRS resource set is associated with DMRS port 0, and the second SRS resource set is associated with DMRS port 2 is associated with DMRS port 3.

[0123] In some embodiments, after determining (L1, L2) based on the above method, the following table (for example, Table 5-Table 20) corresponding to different combinations of (L1, L2) can be determined, and the antenna ports field in the DCI can indicate the shaded rows in the table. That is, the following tables (for example, Table 5-Table 20) are exemplary illustrations for facilitating understanding of the correspondence between (L1, L2) and different DMRS ports and / or different DMRS CDM group(s). The table actually used may not have a column for (L1, L2), and this application does not limit this.

[0124] Table 5 (Table 7.3.1.1.2-8): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=1

[0125] ValueNumber of DMRS CDM group(s)without dataDMRS port(s)0101112203214225236-7ReservedReserved

[0126] Table 6 (Table 7.3.1.1.2-9): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=2

[0127]

[0128] Table 7 (Table 7.3.1.1.2-10): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=3

[0129]

[0130] Table 8 (Table 7.3.1.1.2-11): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=4

[0131]

[0132] In some embodiments, the above four Tables 5-8 may be replaced by the following four Tables 9-12.

[0133] For example, replacement is performed when the DMRS type is Type 1 (ie, dmrs-Type=1) and the maximum length of the DMRS symbol is configured as 2 symbols (ie, maxLength=2).

[0134] The process for determining the DMRS port is similar to that described above and is not repeated here. For example, Table 9 can also be referred to as "Table 7.3.1.1.2-12," Table 10 can also be referred to as "Table 7.3.1.1.2-13," Table 11 can also be referred to as "Table 7.3.1.1.2-14," and Table 12 can also be referred to as "Table 7.3.1.1.2-15."

[0135] Table 9 (Table 7.3.1.1.2-12): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=1

[0136] ValueNumber of DMRS CDM group(s)without dataDMRS port(s)Number of front-load symbols01011111220132114221523162027212822292321024211252122621327214-15ReservedReservedReserved

[0137] Table 10 (Table 7.3.1.1.2-13): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=2

[0138]

[0139] Table 11 (Table 7.3.1.1.2-14): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=3

[0140]

[0141] Table 12 (Table 7.3.1.1.2-15): Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=2, rank=4

[0142]

[0143] In some embodiments, the above four Tables 5-8 may be replaced by the following four Tables 13-16.

[0144] For example, replacement is performed when the DMRS type is Type 2 (ie, dmrs-Type=2) and the maximum length of the DMRS symbol is configured as 1 symbol (ie, maxLength=1).

[0145] The process for determining the DMRS port is similar to that described above and is not repeated here. For example, Table 13 can also be referred to as "Table 7.3.1.1.2-16," Table 14 can also be referred to as "Table 7.3.1.1.2-17," Table 15 can also be referred to as "Table 7.3.1.1.2-18," and Table 16 can also be referred to as "Table 7.3.1.1.2-19."

[0146] Table 13 (Table 7.3.1.1.2-16): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=1

[0147] ValueNumber of DMRS CDM group(s)without dataDMRS port(s)0101112203214225236307318329331034113512-15ReservedReserved

[0148] Table 14 (Table 7.3.1.1.2-17): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=2

[0149]

[0150] Table 15 (Table 7.3.1.1.2-18): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=3

[0151]

[0152] Table 16 (Table 7.3.1.1.2-19): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=1, rank=4

[0153]

[0154] In some embodiments, the above four Tables 5-8 may be replaced by the following four Tables 17-20.

[0155] For example, replacement is performed when the DMRS type is Type 2 (ie, dmrs-Type=2) and the maximum length of the DMRS symbol is configured as 2 symbols (ie, maxLength=2).

[0156] The process for determining the DMRS port is similar to that described above and is not repeated here. For example, Table 17 can also be referred to as "Table 7.3.1.1.2-20," Table 18 can also be referred to as "Table 7.3.1.1.2-21," Table 19 can also be referred to as "Table 7.3.1.1.2-22," and Table 20 can also be referred to as "Table 7.3.1.1.2-23."

[0157] Table 17 (Table 7.3.1.1.2-20): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=1

[0158] ValueNumber of DMRS CDM group(s)without dataDMRS port(s)Number of front-load symbols01011111220132114221523163017311832193311034111351123021331214322153321634217 352183621937220382213922231022331122410225112261622717228-31ReservedReservedReserved

[0159] Table 18 (Table 7.3.1.1.2-21): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=2

[0160]

[0161] Table 19 (Table 7.3.1.1.2-22): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=3

[0162]

[0163] Table 20 (Table 7.3.1.1.2-23): Antenna port(s), transform precoder is disabled, dmrs-Type=2, maxLength=2, rank=4

[0164]

[0165] In some embodiments, for the sTRP scheme and the mTRP scheme, the DMRS port can also be determined according to the above four tables, where rank = L1 = L2. For example, the DCI instructs the terminal device to use a specific one of the sTRP scheme, the mTRP scheme, and the SDM scheme. For the sTRP scheme and the mTRP scheme, the DMRS port is determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where rank = L1 = L2. For the SDM scheme, the DMRS port is also determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where rank = L1 + L2. In this way, dynamic switching of the sTRP scheme, the mTRP scheme, and the SDM scheme can be achieved.

[0166] In some embodiments, for schemes other than the SDM scheme in STxMP, such as the FDM scheme, the SFN scheme, etc., the DMRS port can also be determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where rank = L1 = L2. For example, DCI instructs the terminal device to use a specific one of the sTRP scheme, mTRP scheme, FDM scheme, SFN scheme, and SDM scheme. For the sTRP scheme, mTRP scheme, FDM scheme, and SFN scheme, the DMRS port is determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where rank = L1 = L2. For the SDM scheme, the DMRS port is determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where rank = L1 + L2. In this way, dynamic switching of the sTRP scheme, mTRP scheme, FDM scheme, SFN scheme, and SDM scheme can be achieved.

[0167] In some embodiments, when the STxMP scheme is configured or indicated, the DMRS port can be determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where the STxMP scheme includes at least one of the SDM scheme, the FDM scheme, and the SFN scheme.

[0168] For example, the terminal device is configured by RRC signaling to use the SDM scheme, the terminal device may be further instructed by DCI to use which of the sTRP scheme, mTRP scheme and SDM scheme, and the terminal device may determine the DMRS port based on the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20).

[0169] For example, the terminal device is configured by RRC signaling to use the STxMP scheme, and the terminal device may be further instructed by DCI to use which of the sTRP scheme, mTRP scheme, FDM scheme, SFN scheme, and SDM scheme, and the terminal device determines the DMRS port according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20). For example, if the terminal device is instructed by DCI to use the SDM scheme, the terminal device determines the DMRS port according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20).

[0170] In some embodiments, when uplink data is sent in an SFN scheme, the TPMI and the layer number are determined according to the first TPMI field, the second TPMI field is reserved, or the second TPMI field does not exist; and the DMRS port is determined according to the layer number and the antenna ports field.

[0171] In some embodiments, when uplink data is transmitted using the SFN scheme, two SRS resources are determined according to two SRI fields.

[0172] For example, for the SFN scheme, the two panels use the same TPMI, number of layers, and DMRS port. Therefore, the TPMI and the number of layers L can be determined based only on the first TPMI field. The second TPMI field is reserved, that is, not used, or the second TPMI field is not included in the UL DCI, that is, only the first TPMI field is included; the DMRS port can be determined according to the above four tables (Table 5-Table 8, or Table 9-Table 12, or Table 13-Table 16, or Table 17-Table 20), where rank = L; thus, the TPMI, number of layers, and DMRS port in the SFN scheme can be determined. For example, the UL DCI also includes two SRI fields, which respectively indicate the two SRS resources associated with the two panels. Thus, it is possible to support the transmission of uplink data based on accurate uplink parameters under the SFN scheme.

[0173] The above description is made by taking codebook-based PUSCH transmission as an example. The following description is made of non-codebook-based PUSCH transmission.

[0174] For non-codebook based PUSCH, TPMI does not need to be indicated, and there is no TPMI field in the UL DCI. For example, the first indication field is the first SRI field, and / or the second indication field is the second SRI field.

[0175] FIG4 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application.

[0176] In some embodiments, 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 aforementioned method and is not repeated here.

[0177] Therefore, unlike Figure 3, where L1 and L2 are determined based on two TPMI fields, for non-codebook-based PUSCH, L1 and L2 are determined based on the first and second SRI fields, respectively. For example, if the first SRI field indicates one SRS resource and the second SRI field indicates two SRS resources, (L1, L2) corresponds to (1, 2). The method for determining the DMRS port based on (L1, L2) is the same as described above and will not be repeated here.

[0178] In some embodiments, when uplink data is transmitted using a first transmission scheme, a first layer number is determined based on a first indicator field, and a second layer number is determined based on a second indicator field, wherein the first layer number and the second layer number are the same or different; and a DMRS port is determined based on a correspondence between the first layer number, the second layer number, and the DMRS port; wherein the second field is reserved. The following examples illustrate the transmission of codebook-based uplink data and non-codebook-based uplink data.

[0179] The following description is given by taking codebook based PUSCH transmission as an example.

[0180] In some embodiments, 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 first layer number (L1) are determined according to the first TPMI field of the DCI, the second TPMI and the second layer number (L1) are determined according to the second TPMI field of the DCI, the bit width of the second TPMI field is determined according to the maximum bit width required by more than one scheme, the DMRS port is determined according to (L1, L2), and the antenna ports field is a reserved field and is not used.

[0181] In some embodiments, 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; the bit width of the second indication field in the first transmission scheme is greater than or equal to the bit width of the second indication field in the second transmission scheme; the bit width of the second indication field is equal to the bit width of the first indication field.

[0182] FIG5 is another example diagram for determining the number of layers and DMRS ports in an embodiment of the present application. For example, the first indication field is the first TPMI field, the second indication field is the second TPMI field, and the second field is the antenna ports field; for example, the first transmission scheme is the SDM scheme, and the second transmission scheme includes one of the sTRP scheme, the mTRP scheme, the FDM scheme, or the SFN scheme. FIG5 uses the sTRP scheme and the mTRP scheme as examples.

[0183] For example, for the SDM scheme, the first TPMI and the first layer number (L1) are indicated by the first TPMI field of the DCI, the second TPMI and the second layer number (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 among the three schemes. For example, the method for determining the bit width of the second TPMI field is the same as described above and is not repeated here.

[0184] As shown in Figure 5, the terminal device determines L1 and L2 based on the first TPMI field and the second TPMI field, that is, obtains (L1, L2), and then determines the DMRS port corresponding to (L1, L2) according to the following Table 21. In other words, (L1, L2) and DMRS port have a one-to-one mapping relationship. Therefore, the terminal device determines the DMRS port based on the predefined mapping relationship, and the antenna ports field is a reserved field and is not used. For example, Table 21 can be set in a predefined manner, and this application is not limited to this.

[0185] Table 21

[0186]

[0187] For example, in each row of Table 21, the DMRS port belongs to two CDM groups. The CDM group of the first DMRS port is called the first CDM group (for example, CDM group 0), and the other CDM group is called the second CDM group (for example, CDM group 1). Then 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 (L1, L2) determined by the terminal device according to the first TPMI field and the second TPMI field is (2, 1), the DMRS port is determined to be 0-2 based on the second row of Table 21; similar to the above method, the first TPMI is associated with CDM group 0 (DMRS port 0, DMRS port 1), and the second TPMI is associated with CDM group 1 (DMRS port 2), which is also equivalent to: the first SRS resource set is associated with DMRS port 0 and DMRS port 1, and the second SRS resource set is associated with DMRS port 2.

[0188] For example, the association relationship between each TPMI and each CDM group and each DMRS port in each row of Table 21 may be predefined, and this application does not impose any limitation on this.

[0189] The above description is made by taking codebook-based PUSCH transmission as an example. The following description is made of non-codebook-based PUSCH transmission.

[0190] For non-codebook based PUSCH, TPMI does not need to be indicated, and there is no TPMI field in the UL DCI. For example, the first indication field is the first SRI field, and / or the second indication field is the second SRI field.

[0191] FIG6 is another example diagram of determining the number of layers and DMRS ports according to an embodiment of the present application.

[0192] In some embodiments, 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 aforementioned method and is not repeated here.

[0193] Therefore, unlike Figure 5, where L1 and L2 are determined based on two TPMI fields, for non-codebook-based PUSCH, L1 and L2 are determined based on the first and second SRI fields, respectively. For example, if the first SRI field indicates two SRS resources and the second SRI field indicates one SRS resource, (L1, L2) corresponds to (1, 2). The method for determining the DMRS port based on (L1, L2) is the same as described above and will not be repeated here.

[0194] When uplink data is transmitted using the first transmission scheme, the DMRS port is determined based on the second field; the first and second layer numbers of the first transmission scheme are determined based on the correspondence between the DMRS port and the layer number. The first indicator field is determined when the first layer number is known, and the second indicator field is determined when the second layer number is known. The following examples illustrate the transmission of codebook-based uplink data and non-codebook-based uplink data.

[0195] The following description is given by taking codebook based PUSCH transmission as an example.

[0196] In some embodiments, 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; 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; 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; 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. 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.

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

[0198] FIG7 is another example diagram for determining the number of layers and DMRS ports according to an embodiment of the present application. For example, the first indication field is the first TPMI field, the second indication field is the second TPMI field, and the second field is the antenna ports field; for example, the first transmission scheme is the SDM scheme, and the second transmission scheme includes one of the sTRP scheme, the mTRP scheme, the FDM scheme, or the SFN scheme. FIG7 uses the sTRP scheme and the mTRP scheme as examples.

[0199] In some embodiments, for example, for the SDM scheme, the DMRS port and (L1, L2) are determined according to the antenna ports field, for example, based on a new lookup table (for example, Table 22 below), and the antenna ports field indicates a certain DMRS port, L1 and L2 configuration in the lookup table, that is, indicates a certain row.

[0200] Table 22

[0201]

[0202] In some embodiments, 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; 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. For example, as shown in FIG7 , for the SDM scheme, the bit width of its antenna ports field is less than the bit width of the antenna ports field of sTRP or 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 required bit width of the antenna ports field of a specific scheme becomes smaller, it is bit-padded.

[0203] In some embodiments, 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; 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; 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.

[0204] For example, as shown in Figure 7, under the premise 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 solution also indicates the second TPMI under the condition that L2 is known, the second TPMI fields of the SDM solution and the mTRP solution have the same bit width, and the second TPMI fields of the SDM solution and the mTRP solution have the same number of bits as in Table 4 above.

[0205] Similarly, the first TPMI field of the SDM solution indicates the first TPMI when L1 is known, so the bit width of the first TPMI field is equal to the bit width of the second TPMI field, for example, the same as the number of bits in Table 4. However, because the first TPMI field of the mTRP solution needs to indicate the first TPMI and L1, it requires a larger bit width than the second TPMI field, the same as the number of bits in Table 2. To support dynamic switching between the SDM solution, the sTRP solution, and the mTRP solution, the bit width of the first TPMI field needs to be determined based on the largest bit width among the three solutions, that is, equal to the bit width of the mTRP solution. Therefore, the first TPMI field of the SDM solution needs to be bit-padded.

[0206] The following example illustrates a method for determining the bit width of the second field.

[0207] In some embodiments, for the antenna ports field, the bit width of the first transmission scheme is smaller than the bit width of the second transmission scheme. For example, the first transmission scheme is SDM, and the second transmission scheme is one of the sTRP scheme, the mTRP scheme, the FDM scheme, and the SFN scheme.

[0208] For example, for the second transmission scheme, the antenna ports field is determined according to Tables 5-8 above. Therefore, the required bit width of the antenna ports field is 3 bits. For the first transmission scheme, the antenna ports field is determined according to Table 22. Therefore, the required bit width of the antenna ports field is 2 bits. To support the terminal device's ability to dynamically switch between the first and second transmission schemes, the bit width of the antenna ports field is equal to the maximum value of the above bit widths, for example, the above maximum value is 3 bits. Therefore, the bit width of the antenna ports field is 3 bits.

[0209] In some embodiments, for the antenna ports field, if the bit width required by a solution is smaller than the bit width of the antenna ports field, when the terminal device uses the solution, the most significant bit or the least significant bit of the antenna ports field is filled with '0'.

[0210] For example, one of the above-mentioned solutions is the SDM solution. As mentioned above, the bit width of the antenna ports field of this solution (2 bits) is smaller than the bit width of the antenna ports field (3 bits). When the terminal device uses this solution, the most significant bit of the antenna ports field is filled with '0'. The terminal device ignores the filled bits and still determines the DMRS port based on Table 22. For example, for the indicated "001", it still determines the second row of the corresponding Table 22 according to the bit value of "01".

[0211] In some embodiments, for the SDM scheme, the DMRS port and (L1, L2) are determined according to the antenna ports field.

[0212] For example, the DMRS port and (L1, L2) are determined according to the antenna ports field. The bit width (2 bits) and meaning of the antenna ports field are shown in Table 22. In each row of the following table, the DMRS port belongs to two CDM groups. The CDM group of the first DMRS port is called the first CDM group (for example, CDM group 0), and the other CDM group is called the second CDM group (for example, CDM group 1). Then 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.

[0213] In some embodiments, for the SDM scheme, the first TPMI is determined according to L1, and / or the second TPMI is determined according to L2.

[0214] For example, the terminal device obtains the DMRS port and (L1, L2) according to the antenna ports field, the first TPMI is associated with L1, and the second TPMI is associated with L2. The first TPMI and the second TPMI can be determined based on the first TPMI field and the second TPMI field under the premise of knowing L1 and L2. The bit width and meaning of the first TPMI field and the second TPMI field are shown in Table 23 below.

[0215] Taking L2=2 as an example, which corresponds to the row where 2layers is located in Table 23, 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 number of bits as in Table 4 above; similarly, the first TPMI can be determined using the same method.

[0216] 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

[0217]

[0218] In some embodiments, the bit width of the second indication field is equal to the bit width of the first indication field.

[0219] For example, the second TPMI field indicates the second TPMI when L2 is known, and the first TPMI field indicates the first TPMI when L1 is known. Both fields indicate TPMI based on Table 23, so the second TPMI field and the first TPMI field have the same bit width.

[0220] The following example illustrates a method for determining the bit width of the first TPMI field.

[0221] In some embodiments, the bit width of the first TPMI field is determined according to the maximum value of the bit widths required by more than one scheme.

[0222] 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. For example, the first transmission scheme is SDM, and the second transmission scheme is one of sTRP scheme, mTRP scheme, FDM scheme, and SFN scheme.

[0223] For example, for the mTRP scheme, the first TPMI field is determined according to Table 1, and the required bit width of the first TPMI field is shown in Table 2 (i.e., 6 bits, 5 bits, and 4 bits). For the SDM scheme, the first TPMI field is determined according to Table 23 (the same number of bits as in Table 4, i.e., 5 bits, 4 bits, and 3 bits). To support the terminal device's ability to dynamically switch between the first transmission scheme and the second transmission scheme, the bit width of the first TPMI field is equal to the maximum value of the aforementioned bit widths. For example, Table 2 includes the maximum value of the aforementioned bit widths, so the required bit width of the first TPMI field is shown in Table 2 (i.e., 6 bits, 5 bits, and 4 bits).

[0224] In some embodiments, for the first TPMI field, if the bit width required by a solution is smaller than the bit width of the first TPMI field, when the terminal device uses the solution, the most significant bit or the least significant bit of the first TPMI field is filled with '0'.

[0225] For example, one of the above-mentioned solutions is the SDM solution. As mentioned above, the bit width of the first TPMI field of this solution (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 solution, the most significant bit of the first TPMI field is filled with '0'. The terminal device ignores the filled bits and still determines the first TPMI based on Table 23. For details, please refer to the above-mentioned method, which will not be repeated here.

[0226] The following example illustrates a method for determining the bit width of the second TPMI field:

[0227] In some embodiments, the bit width of the second TPMI field is determined according to the maximum value of the bit widths required by more than one scheme.

[0228] In some embodiments, the second TPMI field has a bit width of the first transmission scheme equal to a bit width of the second transmission scheme. For example, the first transmission scheme is SDM, and the second transmission scheme is one of sTRP, mTRP, FDM, and SFN.

[0229] For example, for the mTRP scheme, the second TPMI field is determined according to Table 3, and the required bit width of the second TPMI field is shown in Table 4 (i.e., 5 bits, 4 bits, and 3 bits). For the SDM scheme, the second TPMI field is determined according to Table 23, and the required bit width of the second TPMI field is shown in Table 4 (i.e., 5 bits, 4 bits, and 3 bits). For the sTRP scheme, the second TPMI field is not required. To support the terminal device's ability to dynamically switch between the first transmission scheme and the second transmission scheme, the bit width of the second TPMI field is equal to the maximum value of the aforementioned bit widths. For example, Table 2 includes the maximum value of the aforementioned bit widths, so the required bit width of the first TPMI field is shown in Table 4 (i.e., 5 bits, 4 bits, and 3 bits).

[0230] In some embodiments, for the second TPMI field, if the bit width required by a scheme is smaller than the bit width of the first TPMI field, when the terminal device uses the scheme, the most significant bit or the least significant bit of the second TPMI field is filled with '0'.

[0231] For example, one of the above-mentioned solutions is the sTRP solution. When the terminal device uses this solution, all valid bits of the second TPMI field are filled with '0', and the terminal device ignores the filled bits.

[0232] The above description is made by taking codebook-based PUSCH transmission as an example. The following description is made of non-codebook-based PUSCH transmission.

[0233] For non-codebook based PUSCH, TPMI does not need to be indicated, and there is no TPMI field in the UL DCI. For example, the first indication field is the first SRI field, and / or the second indication field is the second SRI field.

[0234] Figure 8 is another example diagram for determining the number of layers and DMRS ports in an embodiment of the present application. For example, similar to the aforementioned codebook-based PUSCH, (L1, L2) and DMRS port are determined based on the antenna ports field. Furthermore, the first SRI field and the second SRI field indicate the first SRI and the second SRI under the condition that L1 and L2 are known, respectively. In addition, the method for determining the bit width of the second field, the first SRI field, and the second SRI field is the same as the aforementioned method and will not be repeated here. For the specific content of the first SRI field and the second SRI field indicating the first SRI and the second SRI, please refer to the prior art, and this application does not limit this.

[0235] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0236] As can be seen from the above embodiment, 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. This enables 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0237] Embodiments of the second aspect

[0238] The embodiment of the present application provides an uplink data receiving method, which is applied to a network device. The embodiment of the present application can be combined with the embodiment of the first aspect, or can be implemented independently. The contents that are the same as those of the embodiment of the first aspect are not repeated here.

[0239] FIG9 is a schematic diagram of a method for receiving uplink data according to an embodiment of the present application. As shown in FIG9 , the method includes:

[0240] 901, send downlink control information,

[0241] 902, receiving uplink data sent using the first transmission scheme or the second transmission scheme;

[0242] The terminal device determines the number of layers and DMRS ports according to the downlink control information, and sends the uplink data using the first transmission scheme or the second transmission scheme, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

[0243] It is worth noting that FIG9 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG9 above.

[0244] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0245] As can be seen from the above embodiment, 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. This enables 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0246] Embodiments of the third aspect

[0247] An embodiment of the present application provides an uplink data transmission device. The device may be, for example, a terminal device, or may be one or more components or assemblies configured in the terminal device, wherein the terminal device is configured with a first SRS resource set and a second SRS resource set. Furthermore, the contents identical to those in the first and second aspects of the embodiments are not further described.

[0248] FIG10 is a schematic diagram of an uplink data sending device according to an embodiment of the present application.

[0249] As shown in FIG10 , the uplink data sending apparatus 1000 includes:

[0250] The receiving unit 1001 receives downlink control information.

[0251] The sending unit 1002 determines the number of layers and the DMRS port according to the downlink control information, and sends uplink data using the first transmission scheme or the second transmission scheme.

[0252] In some embodiments, the first transmission scheme includes a space division multiplexing (SDM) scheme; the second transmission scheme includes a single transmission and reception point (sTRP) scheme, a multiple transmission and reception point (mTRP) sTRP scheme, a frequency division multiplexing (FDM) scheme, or a single-frequency network (SFN) scheme; the downlink control information includes a first field and a second field; wherein the first field includes a first indication field and / or a second indication field.

[0253] In some embodiments, when uplink data is sent 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, wherein 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.

[0254] In some embodiments, among at least two DMRS ports, a first part of the DMRS ports belong to a first CDM group, a second part of the DMRS ports belong to a second CDM group, a first number of layers or a first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and a second number of layers 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 among the at least two DMRS ports belongs.

[0255] In some implementations, the first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0256] In some embodiments, when uplink data is sent 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, wherein 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; wherein the second field is reserved.

[0257] In some embodiments, 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 the bit width of the second indication field in the first transmission scheme is greater than or equal to the bit width of the second indication field in the second transmission scheme.

[0258] In some embodiments, the bit width of the second indication field is equal to the bit width of the first indication field.

[0259] In some implementations, when uplink data is sent using the first transmission scheme, the DMRS port is determined according to the second field; and the first and second layer numbers of the first transmission scheme are determined according to the correspondence between the DMRS port and the layer number.

[0260] In some implementations, the first indication field is determined under the condition that the first layer number is known, and the second indication field is determined under the condition that the second layer number is known.

[0261] 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.

[0262] In some embodiments, a bit width of the first indication field in the first transmission scheme is less than or equal to a bit width of the first indication field in the second transmission scheme.

[0263] In some embodiments, 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 indication field is equal to the bit width of the first indication field.

[0264] In some implementations, 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.

[0265] In some implementations, a bit width of the second field in the first transmission scheme is less than or equal to a bit width of the second field in the second transmission scheme.

[0266] In some embodiments, the first indication field indicates a transmission parameter of a first panel or a first SRS resource set; and / or the second indication field indicates a transmission parameter of a second panel or a second SRS resource set.

[0267] In some embodiments, 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.

[0268] In some embodiments, in the case of sending 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 in the case of sending 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.

[0269] In some embodiments, when codebook-based uplink data is sent in an SFN scheme, the number of layers and TPMI are determined according to the first TPMI field; the second TPMI field is reserved or does not exist; and the DMRS port is determined according to the number of layers and antenna port fields.

[0270] In some implementations, the downlink control information includes two SRS resource indicator (SRS resource indicator, SRI) fields, wherein the two SRS resources (SRS resources) indicated by the two SRS resource indicator fields have the same number of SRS ports.

[0271] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0272] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The uplink data sending device 1000 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0273] In addition, for the sake of simplicity, FIG10 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0274] As can be seen from the above embodiment, 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. This enables 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0275] Embodiments of the fourth aspect

[0276] The embodiment of the present application provides an uplink data receiving device, which may be, for example, a network device, or one or more components or assemblies configured in the network device, and the contents identical to those in the first to third aspects of the embodiment will not be repeated.

[0277] FIG11 is a schematic diagram of an uplink data receiving apparatus according to an embodiment of the present application. As shown in FIG11 , the uplink data receiving apparatus 1100 includes:

[0278] The sending unit 1101 sends downlink control information.

[0279] a receiving unit 1102 configured to receive uplink data sent using the first transmission scheme or the second transmission scheme;

[0280] The terminal device determines the number of layers and DMRS ports according to the downlink control information, and sends the uplink data using the first transmission scheme or the second transmission scheme, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

[0281] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0282] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The uplink data receiving apparatus 1100 may also include other components or modules, and for the specific contents of these components or modules, reference may be made to the relevant art.

[0283] In addition, for the sake of simplicity, FIG11 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0284] As can be seen from the above embodiment, 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. This enables 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 use appropriate uplink transmission parameters to transmit uplink data, ensuring the throughput or reliability of uplink data transmission.

[0285] Embodiments of the fifth aspect

[0286] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the embodiments of the first to fourth aspects will not be repeated.

[0287] In some embodiments, the communication system 100 may include at least:

[0288] Network equipment that sends downlink control information,

[0289] A terminal device is configured with a first SRS resource set and a second SRS resource set, 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;

[0290] The network device receives the uplink data sent using the first transmission scheme or the second transmission scheme.

[0291] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0292] Figure 12 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 12 , network device 1200 may include a processor 1210 (e.g., a central processing unit (CPU)) and a memory 1220 ; the memory 1220 is coupled to the processor 1210 . The memory 1220 may store various data and may also store an information processing program 1230 , which is executed under the control of the processor 1210 .

[0293] In addition, as shown in FIG12 , network device 1200 may further include: a transceiver 1240 and an antenna 1250, etc.; wherein, the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that network device 1200 does not necessarily include all the components shown in FIG12 ; in addition, network device 1200 may also include components not shown in FIG12 , and reference may be made to the prior art for details.

[0294] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0295] Figure 13 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 13 , terminal device 1300 may include a processor 1310 and a memory 1320. Memory 1320 stores data and programs and is coupled to processor 1310. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0296] For example, the processor 1310 may be configured to execute a program to implement the uplink data transmission method as described in the embodiment of the first aspect. For example, the processor 1310 may be configured to perform the following control: being configured with a first SRS resource set and a second SRS resource set; receiving downlink control information; determining the number of layers and DMRS ports based on the downlink control information, and transmitting uplink data using the first transmission scheme or the second transmission scheme.

[0297] As shown in Figure 13 , the terminal device 1300 may further include: a communication module 1330, an input unit 1340, a display 1350, and a power supply 1360. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 1300 does not necessarily include all of the components shown in Figure 13 , and these components are not essential. Furthermore, the terminal device 1300 may also include components not shown in Figure 13 , for which reference may be made to the prior art.

[0298] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the uplink data sending method described in the embodiment of the first aspect.

[0299] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the uplink data sending method described in the embodiment of the first aspect.

[0300] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the uplink data receiving method described in the embodiment of the second aspect.

[0301] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the uplink data receiving method described in the embodiment of the second aspect.

[0302] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0303] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0304] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0305] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0306] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0307] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0308] 1. A method for transmitting uplink data, applied to a terminal device, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set), the method comprising:

[0309] The terminal device receives downlink control information,

[0310] The number of layers and the DMRS port are determined according to the downlink control information, and uplink data is sent using the first transmission scheme or the second transmission scheme.

[0311] 2. The method according to Supplement 1, wherein:

[0312] The first transmission scheme includes an SDM scheme;

[0313] The second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, or an SFN scheme;

[0314] The downlink control information includes a first field and a second field; wherein the first field includes a first indication field and / or a second indication field.

[0315] 3. The method according to Supplementary Note 2, wherein:

[0316] When the uplink data is sent using the first transmission scheme, determining a first layer number according to the first indication field, and determining a second layer number according to the second indication field, wherein the first layer number and the second layer number are the same or different; and

[0317] The DMRS port is determined according to the sum of the first number of layers and the second number of layers, and the second field.

[0318] 4. The method according to Supplement 3, wherein:

[0319] Among the at least two DMRS ports, a first part of the DMRS ports belongs to a first CDM group, and a second part of the DMRS ports belongs to a second CDM group,

[0320] The first number of layers or the first SRS resource set is associated with the first CDM group and the DMRS port included therein, the second number of layers or the second SRS resource set is associated with the second CDM group and the DMRS port included therein,

[0321] The first CDM group is the CDM group to which the first DMRS port among the at least two DMRS ports belongs.

[0322] 5. The method according to Supplement 4, wherein:

[0323] The first CDM group includes DMRS port 0, and the second CDM group includes DMRS port 2 and DMRS port 3.

[0324] 6. The method according to Supplement 2, wherein:

[0325] When the uplink data is sent using the first transmission scheme, determining a first layer number according to the first indication field, and determining a second layer number according to the second indication field, wherein the first layer number and the second layer number are the same or different; and

[0326] Determine the DMRS port according to a correspondence between the first number of layers, the second number of layers, and the DMRS port;

[0327] The second field is reserved.

[0328] 7. The method according to any one of Notes 3 to 6, wherein

[0329] 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.

[0330] 8. The method according to Supplementary Note 7, wherein:

[0331] A bit width of the second indication field in the first transmission scheme is greater than or equal to a bit width of the second indication field in the second transmission scheme.

[0332] 9. The method according to any one of Notes 3 to 6, wherein

[0333] The bit width of the second indication field is equal to the bit width of the first indication field.

[0334] 10. The method according to Supplementary Note 2, wherein:

[0335] When the uplink data is sent using the first transmission scheme, determining the DMRS port according to the second field;

[0336] According to the correspondence between the DMRS ports and the number of layers, a first number of layers and a second number of layers of the first transmission scheme are determined.

[0337] 11. The method according to Supplement 10, wherein:

[0338] The first indication field is determined under the condition that the first layer number is known, and the second indication field is determined under the condition that the second layer number is known.

[0339] 12. The method according to Note 10 or 11, wherein

[0340] 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.

[0341] 13. The method according to Supplement 12, wherein:

[0342] A bit width of the first indication field in the first transmission scheme is smaller than or equal to a bit width of the first indication field in the second transmission scheme.

[0343] 14. The method according to Note 10 or 11, wherein

[0344] 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

[0345] The bit width of the second indication field is equal to the bit width of the first indication field.

[0346] 15. The method according to Note 10 or 11, wherein

[0347] 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.

[0348] 16. The method according to Supplement 15, wherein:

[0349] A bit width of the second field in the first transmission scheme is less than or equal to a bit width of the second field in the second transmission scheme.

[0350] 17. The method according to any one of Notes 2 to 16, wherein:

[0351] The first indication field indicates a transmission parameter of a first panel or the first SRS resource set; and / or

[0352] The second indication field indicates a transmission parameter of a second panel or the second SRS resource set.

[0353] 18. The method according to any one of Notes 2 to 17, wherein:

[0354] The first indication field is a first TPMI field or a first SRI field; and / or

[0355] The second indication field is a second TPMI field or a second SRI field;

[0356] The second field is an antenna port field.

[0357] 19. The method according to Supplement 18, wherein:

[0358] In the case of sending 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

[0359] In the case of sending 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.

[0360] 20. The method according to Supplement 19, wherein:

[0361] In the case of transmitting codebook-based uplink data in the SFN scheme, determining the number of layers and the TPMI according to the first TPMI field; the second TPMI field is reserved or does not exist; and

[0362] The DMRS port is determined according to the number of layers and the antenna port field.

[0363] 21. The method according to Supplement 20, wherein:

[0364] The downlink control information includes two SRS resource indicator (SRS resource indicator, SRI) fields, wherein the number of SRS ports of two SRS resources (SRS resources) indicated by the two SRS resource indicator fields is the same.

[0365] 22. A method for receiving uplink data, applied to a network device, the method comprising:

[0366] The network device sends downlink control information,

[0367] The network device receives uplink data sent using the first transmission scheme or the second transmission scheme;

[0368] The terminal device determines the number of layers and DMRS ports according to the downlink control information, and sends the uplink data using the first transmission scheme or the second transmission scheme, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

[0369] 23. A terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method as described in any one of Notes 1 to 21.

[0370] 24. A network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the method as described in Note 22.

[0371] 25. A communication system comprising:

[0372] Network equipment that sends downlink control information,

[0373] A terminal device, configured with a first SRS resource set and a second SRS resource set, 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;

[0374] The network device receives the uplink data sent using the first transmission scheme or the second transmission scheme.

Claims

1. An uplink data sending device, configured in a terminal device, wherein: The terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set), and the uplink data sending device includes: a receiving unit, which receives downlink control information, A sending unit is configured to determine the number of layers and the DMRS port according to the downlink control information, and to send uplink data using the first transmission scheme or the second transmission scheme.

2. The device according to claim 1, wherein 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, or a single-frequency network (SFN) scheme; The downlink control information includes a first field and a second field; wherein the first field includes a first indication field and / or a second indication field.

3. The device according to claim 2, wherein When the uplink data is sent using the first transmission scheme, determining a first layer number according to the first indication field, and determining a second layer number according to the second indication field, wherein the first layer number and the second layer number are the same or different; and The DMRS port is determined according to the sum of the first number of layers and the second number of layers, and the second field.

4. The device according to claim 3, wherein Among the at least two DMRS ports, a first part of the DMRS ports belongs to a first CDM group, and a second part of the DMRS ports belongs to a second CDM group, The first number of layers or the first SRS resource set is associated with the first CDM group and the DMRS port included therein, the second number of layers or the second SRS resource set is associated with the second CDM group and the DMRS port included therein, The first CDM group is the CDM group to which the first DMRS port among the at least two DMRS ports belongs.

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

6. The device according to claim 2, wherein When the uplink data is sent using the first transmission scheme, determining a first layer number according to the first indication field, and determining a second layer number according to the second indication field, wherein the first layer number and the second layer number are the same or different; and Determine the DMRS port according to a correspondence between the first number of layers, the second number of layers, and the DMRS port; The second field is reserved.

7. The device according to claim 3, wherein 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 A bit width of the second indication field in the first transmission scheme is greater than or equal to a bit width of the second indication field in the second transmission scheme.

8. The device according to claim 3, wherein The bit width of the second indication field is equal to the bit width of the first indication field.

9. The device according to claim 2, wherein When the uplink data is sent using the first transmission scheme, determining the DMRS port according to the second field; According to the correspondence between the DMRS ports and the number of layers, a first number of layers and a second number of layers of the first transmission scheme are determined.

10. The device according to claim 9, wherein The first indication field is determined under the condition that the first layer number is known, and the second indication field is determined under the condition that the second layer number is known.

11. The device according to claim 9, wherein 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; A bit width of the first indication field in the first transmission scheme is smaller than or equal to a bit width of the first indication field in the second transmission scheme.

12. The device according to claim 9, wherein 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 indication field is equal to the bit width of the first indication field.

13. The device according to claim 9, 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. The device according to claim 13, wherein A bit width of the second field in the first transmission scheme is less than or equal to a bit width of the second field in the second transmission scheme.

15. The device according to claim 2, wherein The first indication field indicates a transmission parameter of a first panel or the first SRS resource set; and / or The second indication field indicates a transmission parameter of a second panel or the second SRS resource set.

16. The device according to claim 2, wherein 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 second field is an antenna port field.

17. The device according to claim 16, wherein In the case of sending codebook based uplink data, the first indication field is a first TPMI field, and / or the second indication field is a second TPMI field; as well as In the case of sending 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. The device according to claim 17, wherein In the case of transmitting codebook-based uplink data in the SFN scheme, determining the number of layers and the TPMI according to the first TPMI field; the second TPMI field is reserved or does not exist; and The DMRS port is determined according to the number of layers and the antenna port field.

19. The device according to claim 18, wherein The downlink control information includes two SRS resource indicator (SRS resource indicator, SRI) fields, wherein the number of SRS ports of two SRS resources (SRS resources) indicated by the two SRS resource indicator fields is the same.

20. An uplink data receiving device, configured in a network device, comprising: A sending unit, which sends downlink control information, a receiving unit configured to receive uplink data sent using the first transmission scheme or the second transmission scheme; The terminal device determines the number of layers and DMRS ports according to the downlink control information, and sends the uplink data using the first transmission scheme or the second transmission scheme, wherein the terminal device is configured with a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set).

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