Uplink data transmission, uplink data reception apparatus and method

Abstract

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

Description

Technical Field

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

Background Art

[0002] 3GPP (registered trademark) is performing standardization work on unified transmission configuration indication (TCI) in the standardization process of Release 17 (Rel-17). Among them, the unified TCI in Rel-17 is mainly designed for the single transmission and reception point (sTRP) scenario.

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

[0004] In the conventional standardization work, in Rel-16, standardization has been performed for the transmission of the mTRP-based Physical Downlink Shared Channel (PDSCH), and in Rel-17, standardization has been performed for the transmission of the mTRP-based Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH). Among them, mTRP transmission includes mTRP transmission based on single Downlink Control Information (sDCI) and mTRP transmission based on multiple DCI (mDCI).

[0005] Note that the introduction of the above background art is for clearly and completely explaining the technical solution of the present invention and for facilitating understanding by those skilled in the art. These technical solutions should not be construed as being well-known to those skilled in the art because they are described in the background art of the present invention.

Summary of the Invention

Problems to be Solved by the Invention

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

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

[0008] Therefore, an instruction or update for the TCI state actually also includes an instruction or update for the beam used by the terminal device. The TCI state includes a joint TCI state, a downlink TCI state, and an uplink TCI state. The source reference signal included in the downlink TCI state is a downlink source reference signal, the source reference signal included in the uplink TCI state is an uplink source reference signal, and the source reference signal included in the joint TCI state is both a downlink source reference signal and an uplink source reference signal. The joint TCI state acts on the downlink beam (receiving beam) and the uplink beam (transmitting beam) simultaneously. In other words, the downlink beam and the uplink beam use the same beam, but the beam directions are opposite, that is, there is an oppositeness between the uplink and downlink beams. The downlink TCI state acts only on the downlink beam. The uplink TCI state acts only on the uplink beam. The uplink beam is also referred to as an uplink transmission spatial filter. The TCI field can indicate a joint TCI state (joint DL / UL TCI), or the TCI field can indicate a downlink TCI state and / or an uplink TCI state (separate DL / UL TCI), and these two modes can be set by RRC signaling. In the case of Rel-17 unified TCI, one TCI field indicates one joint TCI state, or one downlink TCI state, or one uplink TCI state, or one downlink TCI state and one uplink TCI state.

[0009] Multi-TRP (mTRP, multiple transmission and reception point) is an important scenario in the 5G NR system. Through mTRP-based transmission, the goal of improving throughput or reliability can be achieved. In Rel-16, standardization has been carried out for mTRP-based PDSCH transmission, and in Rel-17, standardization has been carried out for mTRP-based PDCCH, PUSCH, and PUCCH transmissions. Also, the current mTRP transmission in Rel-17 includes sDCI (single DCI)-based mTRP transmission and mDCI (multiple DCI)-based mTRP transmission. For sDCI mTRP, one DCI schedules the uplink and downlink transmissions of two TRPs, which is more suitable when 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 when the backhaul between TRPs is not ideal.

[0010] However, the inventor has discovered the following. That is, in the case of Rel-17, since the terminal device uses only one panel each time it performs uplink transmission, even if the terminal device has multiple panels, Rel-17 does not support the terminal device to perform uplink transmission simultaneously using multiple panels. So far, the standardization work of Rel-18 has not officially started yet, but multi-panel simultaneous uplink transmission has already been determined as one of the contents of the Rel-18 project. That is, based on the aforementioned unified TCI framework and the mTRP scenario, in Rel-18, it is planned to conduct research and standardization work on the scheme of simultaneous multi-panel UL transmission (STxMP) of the terminal device.

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

[0012] Therefore, how to indicate parameters such as the number of layers, precoding matrix, and DMRS ports for a specific (predetermined) transmission scheme in the STxMP scheme remains an open question.

[0013] Regarding at least one of the above problems, embodiments of the present invention provide an uplink data transmission, uplink data reception method, and apparatus. The terminal device determines the number of layers and DMRS ports based on the received downlink control information, and transmits uplink data using a specific transmission scheme. Thereby, flexible indication of parameters such as the number of layers and DMRS ports can be realized, dynamic switching between different transmission schemes can be supported, and since the terminal device can transmit uplink data using appropriate uplink transmission parameters, the throughput or reliability of uplink data transmission can be guaranteed.

Means for Solving the Problems

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

[0015] According to another aspect of an embodiment of the present invention, an uplink data reception method is provided and applied to a network device, and the method includes: the network device transmitting downlink control information; and the network device receiving uplink data transmitted using a first transmission scheme or a second transmission scheme, wherein the terminal device determines a number of layers and DMRS ports based on the downlink control information, and transmits the uplink data using the first transmission scheme or the second transmission scheme, and the terminal device has a first SRS resource set and a second SRS resource set configured therein.

[0016] According to another aspect of an embodiment of the present invention, an uplink data transmission apparatus is provided and disposed in a terminal device, wherein the terminal device has a first SRS resource set and a second SRS resource set configured therein, and the uplink data transmission apparatus includes: a receiving unit configured to receive downlink control information; and a transmitting unit configured to determine a number of layers and DMRS ports based on the downlink control information, and transmit uplink data using a first transmission scheme or a second transmission scheme.

[0017] According to another aspect of the embodiments of the present invention, an uplink data receiving device is provided, which is arranged in a network device. The uplink data receiving device includes: a transmitting unit that transmits downlink control information; and a receiving unit that receives uplink data transmitted in a first transmission scheme or a second transmission scheme, wherein a terminal device determines the number of layers and DMRS ports based on the downlink control information, and transmits the uplink data in the first transmission scheme or the second transmission scheme. Among them, a first SRS resource set and a second SRS resource set are set in the terminal device.

Advantages of the Invention

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

[0019] The terminal device determines the number of layers and DMRS ports based on the received downlink control information, and transmits uplink data in a specific transmission scheme. Thereby, flexible instructions for parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. In addition, since the terminal device can transmit uplink data using appropriate uplink transmission parameters, the throughput or reliability of uplink data transmission can be guaranteed.

[0020] Specific embodiments of the present invention are disclosed in detail by referring to the following description and drawings, showing aspects in which the principles of the present invention can be adopted. It should be noted that the embodiments of the present invention are not limited in scope by these. Within the scope of the appended claims, the embodiments of the present invention may include various changes, modifications, and alternatives.

[0021] Also, the features described and / or illustrated for one embodiment can be used in one or more other embodiments in the same or a similar manner, combined with the features in other embodiments, or replace the features in other embodiments.

[0022] Note that terms such as "comprising / including", when used in this specification, refer to the presence of features, elements, steps, or assemblies, but also refer to the fact that they do not exclude the presence or addition of one or more other features, elements, steps, or assemblies.

Brief Description of the Drawings

[0023] The elements and features described in one drawing or one embodiment of the present invention can be combined with the elements and features shown in one or more other drawings or embodiments. Also, in the drawings, the same reference numerals are used to indicate corresponding parts in several drawings and are also used to indicate corresponding parts used in multiple embodiments.

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DETAILED DESCRIPTION OF THE INVENTION

[0024] By referring to the accompanying drawings and the following description, the foregoing and other features of the present invention will become apparent. Although specific embodiments of the present invention are disclosed in the specification and drawings, they are only examples that can adopt the principles of the present invention. It should be understood that the present invention is not limited to the described embodiments, that is, the present invention also includes all changes, modifications, and alternatives within the scope of the appended claims.

[0025] In an embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any of the following communication standards, for example, LTE (Long Term Evolution), LTE-A (LTE-Advanced), WCDMA (registered trademark) (Wideband Code Division Multiple Access), HSPA (High-Speed Packet Access), and the like.

[0026] In addition, the communication between devices in the communication system may be performed according to any stage of the communication protocol. For example, it may include, but is not limited to, the following communication protocols, that is, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other conventional or future-developed communication protocols.

[0027] In an embodiment of the present invention, the term "network device" refers to, for example, a device that connects a terminal device to a communication network and provides services to the terminal device in a communication system. The network device may include, but is not limited to, the following, namely, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), and the like.

[0028] The base station may include, but is not limited to, the following, namely, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may further include a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). Also, the term "base station" may include some or all of their functions, and each base station can provide communication coverage for a specific geographical area. The term "cell" may refer to a base station and / or the area it covers, depending on the context in which the term is used. Also, the cell and the base station are interchangeable as long as there is no confusion.

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

[0030] The user equipment may include, but is not limited to, for example, a cellular phone, a PDA (Personal Digital Assistant), a wireless modem, a wireless communication device, a mobile device, a machine type communication device, a laptop computer, a cordless telephone, a smartphone, a smartwatch, a digital camera, etc.

[0031] Also, for example, in scenarios such as IoT (Internet of Things), the user equipment may further be a device or apparatus that performs monitoring or measurement. For example, it may include, but is not limited to, the following, that is, a machine type communication (MTC) terminal, a vehicle-mounted communication terminal, a D2D (Device to Device) terminal, an M2M (Machine to Machine) terminal, etc.

[0032] Also, the term "network side" or "network equipment side" refers to the side of the network, which may be a certain base station or may include one or more network devices as described above. The term "user side" or "terminal side" or "terminal equipment side" refers to the side of the user or the terminal, which may be a certain UE or may include one or more terminal devices as described above. Here, unless otherwise specified, the "equipment" may refer to network equipment or terminal equipment.

[0033] Hereinafter, the scenarios of the embodiments of the present invention will be described through examples, but the present invention is not limited thereto.

[0034] FIG. 1 is a diagram showing a communication system in an embodiment of the present invention, and shows a case where terminal devices and network devices are taken as examples. As shown in FIG. 1, the communication system 100 may include a first TRP 101, a second TRP 102, and a terminal device 103. Among them, the first TRP 101 and the second TRP 102 may be network devices. For the sake of convenience, in FIG. 1, only two network devices and one terminal device are taken as examples for description, but the embodiments of the present invention are not limited thereto.

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

[0036] In Rel-16, standardization has been carried out for mTRP-based PDSCH transmission, and in Rel-17, standardization has been carried out for mTRP-based PDCCH, PUSCH, and PUCCH transmission. mTRP transmission includes sDCI (single DCI)-based mTRP transmission and mDCI (multiple DCI)-based mTRP transmission. In the case of sDCI mTRP, one DCI schedules the uplink and downlink transmissions of two TRPs, which is more suitable when the backhaul between the TRPs is ideal. In the case of mDCI mTRP, two TRPs use two DCIs to schedule the uplink and downlink transmissions of their respective TRPs, which is more suitable when the backhaul between the TRPs is not ideal.

[0037] Taking the example of the terminal device 103 performing PUSCH transmission in the mTRP scenario, as shown in FIG. 1, the terminal device 103 transmits the PUSCH in the manner of PUSCH repetition. For example, it transmits to the first TRP 101 in slot 1, transmits to the second TRP 102 in slot 2, and the rest can be analogized based on this.

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

[0039] Due to the geographical location difference between the first TRP 101 and the second TRP 102, the terminal device may transmit the PUSCH to the first TRP 101 and / or the second TRP 102 based on transmission parameters such as different precoding matrices, SRI (SRS resource indicator), and power control parameters. Also, the terminal device acquires 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.

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

[0041] However, in Rel-18, it is planned to conduct research and standardization work on the simultaneous multi-panel UL transmission (STxMP) scheme of the terminal device. For example, in the scenario of sDCI mTRP, one DCI needs to indicate the number of layers, precoding matrix, and DMRS ports used by multiple panels, that is, one DCI needs to indicate the number of layers, precoding matrix, and DMRS ports used for multiple transmissions. In the time-division multiplexing-based mTRP PUSCH scheme of Rel-17, one DCI can indicate the number of layers and precoding matrix used for multiple transmissions, but this indication is limited to the premise hypothesis that multiple transmissions use the same number of layers, and the DMRS ports used for multiple transmissions are the same. However, in some transmission schemes in the STxMP scheme, multiple transmissions from multiple panels can use different numbers of layers and different DMRS ports. Therefore, in the STxMP scheme of Rel-18, the indication method in the mTRP scheme of Rel-17 cannot be directly reused.

[0042] For at least one of the above problems, embodiments of the present invention provide an uplink data transmission method, an uplink data reception method, and an apparatus.

[0043] <Example of the first side> In an embodiment of the present invention, an uplink data transmission method is provided, which is applied to the terminal device side. The terminal device has a first SRS resource set and a second SRS resource set configured.

[0044] FIG. 2 is a diagram showing the uplink data transmission method in an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps (operations), that is, 201: The terminal device receives downlink control information; and 202: Based on the downlink control information, determine the number of layers and the DMRS ports, and transmit the uplink data using the first transmission scheme or the second transmission scheme.

[0045] It should be noted that the above FIG. 2 is for illustrative explanation of the embodiment of the present invention, and the terminal device is taken as an example, but the present invention is not limited thereto. For example, the execution order between each operation can be appropriately adjusted, some operations can be increased or decreased, and the object of the above operations can also be adjusted. That is, those skilled in the art may make appropriate modifications based on the above content without being limited to the description of FIG. 2 above.

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

[0047] Thereby, the terminal device can determine the number of layers and the DMRS ports based on the received downlink control information, and transmit uplink data in a specific transmission scheme. In this way, flexible indication of parameters such as the number of layers and DMRS ports can be realized, dynamic switching between different transmission schemes can be supported, and the terminal device can transmit uplink data using appropriate uplink transmission parameters, so that the throughput or reliability of uplink data transmission can be guaranteed.

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

[0049] For example, the STxMP scheme in Rel-18 may include one of a space division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, and a single-frequency network (SFN) scheme.

[0050] For example, in the case of the SDM scheme, it means that at least two panels transmit different layers at the same time-frequency resource. For example, panel 1 transmits layers 1 and 2, and panel 2 transmits layer 3. In the case of the FDM scheme, it means that at least two panels transmit simultaneously at different frequency resources, and what is transmitted are two different parts of one PUSCH, or what is transmitted are two PUSCH repetitions of the PUSCH. In the case of the SFN scheme, it means that at least two panels transmit the same data at the same time-frequency resource.

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

[0052] In some embodiments, the downlink control information may be referred to as an uplink grant (UL grant) or downlink control information for scheduling the uplink (UL downlink control information, UL DCI). The downlink control information may include a plurality of fields. For example, it includes a first field and a second field, where the first field includes a first indication field and / or a second indication field.

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

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

[0055] In some embodiments, when transmitting codebook based uplink data, the first indication field is the first TPMI field, and / or the second indication field is the second TPMI field; and when transmitting non-codebook based uplink data, the first indication field is the first SRI field, and / or the second indication field is the second SRI field. For example, the differences between codebook based PUSCH transmission and non-codebook based PUSCH transmission are as follows: that is, for non-codebook based PUSCH transmission, it may not be necessary to indicate the TPMI, or it may be described that there is no TPMI field in the downlink control information. Examples of transmitting codebook based uplink data and non-codebook based uplink data will be described below respectively.

[0056] In some embodiments, when transmitting uplink data using the first transmission scheme, determine the first number of layers based on the first indication field, and determine the second number of layers based on the second indication field, where the first number of layers and the second number of layers may be the same or different, and determine the DMRS ports based on the sum of the first number of layers and the second number of layers and the second field. Examples of transmitting codebook based uplink data and non-codebook based uplink data will be described below respectively.

[0057] The following takes codebook based PUSCH transmission as an example for description.

[0058] 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, and the bit width of the second indication field is equal to the bit width of the first indication field.

[0059] FIG. 3 is a diagram showing an example of determining the number of layers and DMRS ports in an embodiment of the present invention. For example, the first indication field is the first TPMI field, the second indication field is the second TPMI field, 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, mTRP scheme, FDM scheme, and SFN scheme. In FIG. 3, the sTRP scheme and the mTRP scheme are taken as examples.

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

[0061] FIG. 3 exemplarily illustrates this. In the case of the SDM scheme, the first TPMI and the first number of layers (L1) are indicated by the first TPMI field of the DCI, the second TPMI and the second number of layers (L2) are indicated by the second TPMI field of the DCI, or it may be described that the above-mentioned information is independently indicated by two TPMI fields. Therefore, the bit width of the second TPMI field is equal to the bit width of the first TPMI field. As shown in FIG. 3, in the case of the mTRP scheme, since there is a limitation of L2 = L1, that is, L2 indicates the second TPMI under known conditions. Therefore, the second TPMI field does not need to indicate information regarding L2, and the bit width of the second TPMI may be smaller than the bit width of the first TPMI field. Also, in the case of the sTRP scheme, there is no need to indicate the second TPMI. Therefore, the second TPMI field is reserved, that is, not used.

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

[0063] Hereinafter, a method for determining the bit widths of the first TPMI field and the second TPMI field will be described with examples.

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

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

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

[0067] 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.

[0068]

Table 1

[0069]

Table 2

[0070] For example, in the case of the first transmission scheme (e.g., the SDM scheme), the second TPMI field is determined based on the above Table 1 (which may also be referred to as “Table 7.3.1.1.2-2”), that is, the bit width required for the second TPMI field is as shown in Table 2. In the case of the second transmission scheme (e.g., one of the mTRP scheme, FDM scheme, and SFN scheme), since the second TPMI field is determined based on the following Table 3 (which may also be referred to as “Table 7.3.1.1.2-2C”), the bit width required for the second TPMI field is as shown in Table 4.

[0071] 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.

[0072]

Table 3

[0073]

Table 4

[0074] In some embodiments, for the second TPMI field, when the bit width required for a certain scheme is smaller than the bit width of the second 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’.

[0075] For example, in the case of the above example, since the bit width in Table 2 is larger than the bit width in Table 4, the bit width of the second TPMI field is determined based on Table 2. For example, in the case of one of the second transmission schemes, such as 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 filled with ‘0’, and the terminal device ignores the filled bits and still determines the second TPMI based on Table 3 (which may also be referred to as “Table 7.3.1.1.2-2C”).

[0076] For example, taking the column of "codebookSubset=fullyAndPartialAndNonCoherent" as an example, when the first transmission scheme is the SDM scheme, the second TPMI field in the DCI indicates "110111", which indicates the row with index = 55 in Table 1 above (which may also be referred to as "Table 7.3.1.1.2-2"). When the second transmission scheme is the mTRP scheme, first, it is necessary to fill one '0' bit in the highest digit. And the second TPMI field in the DCI indicates, for example, "011011", which still determines several rows in Table 3 (which may also be referred to as "Table 7.3.1.1.2-2C") based on the lowest 5 bits, that is, determines several rows with index = 27 in Table 3 above (which may also be referred to as "Table 7.3.1.1.2-2C") based on "11011". And 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.

[0077] In some embodiments, the present invention does not limit how to achieve dynamic switching between the first transmission scheme and the second transmission scheme. For example, the terminal device can determine the use of the first transmission scheme or the second transmission scheme based on a specific DCI field or based on a specific time-frequency resource indicated by the DCI.

[0078] In some embodiments, among at least two DMRS ports, the DMRS ports in the first part belong to the first CDM group, the DMRS ports in the second part belong to the second CDM group, the first number of layers or the first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and the second number of layers or the second SRS resource set is associated with the second CDM group and the DMRS ports included therein. Among them, the first CDM group is the CDM group to which the first DMRS port among at least two of the 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.

[0079] For example, one CDM group refers to a group in which different DMRS ports can share the same time-frequency resource. For example, different DMRS ports are distinguished by using different orthogonal codes in the time domain and the frequency domain. Different CDM groups use different time-frequency resources. Also, for the specific mapping relationship between the DMRS port and the CDM group, reference can be made to the relevant regulations in the prior art and standards, and the present invention does not limit this.

[0080] Hereinafter, how to determine the DMRS port will be described.

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

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

[0083] In some embodiments, different DMRS ports belong to two CDM groups. The first part of the DMRS ports belongs to the first CDM group, and the second part of the DMRS ports belongs to the second CDM group. The first number of layers or the first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and the second number of layers or the second SRS resource set is associated with the second CDM group and the DMRS ports included therein. Among them, the first CDM group is the CDM group to which the first DMRS port among at least two DMRS ports belongs.

[0084] For example, when the SDM scheme is set or indicated, DMRS port 0, DMRS port 2, and DMRS port 3 may be indicated. In other words, DMRS port 0, DMRS port 2, and DMRS port 3 are one combination of DMRS ports that can be used in the SDM scheme.

[0085] In some implementation manners, the first TPMI is associated with the CDM group to which the 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.

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

[0087] For example, in the case of 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 as shown in the following four tables, Table 5 - Table 8. Among them, Table 5 may be referred to as "Table 7.3.1.1.2-8", Table 6 may be referred to as "Table 7.3.1.1.2-9", Table 7 may be referred to as "Table 7.3.1.1.2-10", and Table 8 may be referred to as "Table 7.3.1.1.2-11". Among them, "Table 7.3.1.1.2-8" - "Table 7.3.1.1.2-11" respectively correspond to different rank values, where rank = L1+L2. When the DMRS type is Type 1 (i.e., dmrs-Type = 1) and the maximum length of the DMRS symbol is set to one symbol (i.e., maxLength = 1), the above four tables are used. For example, the table numbers of "Table 7.3.1.1.2-8" - "Table 7.3.1.1.2-11" described below are exemplary explanations based on the current standard (e.g., the relevant sections in TS38.212), but may be adaptively changed based on subsequent chapters updated due to the progress of standardization. The present invention is not limited thereto. For example, for "Table 7.3.1.1.2-8" - "Table 7.3.1.1.2-11" described below, the relevant rows in the current standard's "Table 7.3.1.1.2-8" - "Table 7.3.1.1.2-11" (e.g., for DMRS port(s), the rows corresponding to the shaded parts other than the cases of 0, 2, 3, such as the fourth row with Value = 3 in "Table 7.3.1.1.2-9") may be reused, and relevant rows (e.g., for DMRS port(s), the rows corresponding to the shaded parts in the cases of 0, 2, 3, such as the second row with Value = 1 in "Table 7.3.1.1.2-10") may be newly added based on the tables in the current standard.

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

[0089] For example, since L1 + L2 > 1, the content of the rank = 1 table is not applicable. That is, in the SDM scheme, the following table "Table 7.3.1.1.2-8" is not used. For example, as shown in the first row of "Table 7.3.1.1.2-10", 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 equivalent to the first SRS resource set being associated with DMRS port 0 and DMRS port 1, and the second SRS resource set being 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 equivalent to the first SRS resource set being associated with DMRS port 0, and the second SRS resource set being associated with DMRS port 2 and DMRS port 3.

[0090] In some embodiments, after (L1, L2) is determined based on the above method, the following tables (for example, Table 5 - Table 20) corresponding to different combinations of (L1, L2) can be determined. The antenna ports field in the DCI can indicate each row marked in shadow in the table. That is, each of the following tables (for example, Table 5 - Table 20) is an exemplary description for easily understanding the correspondence between (L1, L2) and different DMRS ports and / or different DMRS CDM group(s). The actually used table may not have the column of (L1, L2), and the present invention does not limit this.

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

[0092]

Table 5

[0093]

Table 6

[0094]

Table 7

[0095]

Table 8

[0096] For example, it is replaced when the DMRS type is Type 1 (i.e., dmrs-Type = 1) and the maximum length of the DMRS symbol is set to two symbols (i.e., maxLength = 2).

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

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

[0099]

Table 9

[0100]

Table 10

[0101]

Table 11

[0102]

Table 12

[0103] For example, it is replaced when the DMRS type is Type 2 (i.e., dmrs-Type = 2) and the maximum length of the DMRS symbol is set to one symbol (i.e., maxLength = 1).

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

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

[0106]

Table 13

[0107]

Table 14

[0108]

Table 15

[0109]

Table 16

[0110] For example, it is replaced when the DMRS type is Type 2 (i.e., dmrs-Type = 2) and the maximum length of the DMRS symbol is set to two symbols (i.e., maxLength = 2).

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

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

[0113]

Table 17

[0114]

Table 18

[0115]

Table 19

[0116]

Table 20

[0117] In some embodiments, among STxMP, for other schemes other than the SDM scheme, such as the FDM scheme, the SFN scheme, etc., the DMRS port may also be determined 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), among which rank = L1 = L2. For example, the DCI instructs the terminal device to use a specific one of the sTRP scheme, the mTRP scheme, the FDM scheme, the SFN scheme, and the SDM scheme. For the sTRP scheme, the mTRP scheme, the FDM scheme, and the SFN scheme, the DMRS port is determined 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), among which rank = L1 = L2. For the SDM scheme, the DMRS port is determined 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), among which rank = L1 + L2. Thereby, dynamic switching among the sTRP scheme, the mTRP scheme, the FDM scheme, the SFN scheme, and the SDM scheme can be realized.

[0118] In some embodiments, when the STxMP scheme is set or indicated, the DMRS port may be determined 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), where the STxMP scheme includes at least one of the SDM scheme, the FDM scheme, and the SFN scheme.

[0119] For example, when the terminal device is set to be able to use the SDM scheme by RRC signaling, the terminal device may be further indicated by DCI which scheme among the sTRP scheme, the mTRP scheme, and the SDM scheme to use, and the terminal device can 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).

[0120] For example, when the terminal device is set to be able to use the STxMP scheme by RRC signaling, the terminal device may be further indicated by DCI which scheme among the sTRP scheme, the mTRP scheme, the FDM scheme, the SFN scheme, and the SDM scheme to use, and the terminal device can 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). For example, when the terminal device is indicated by DCI to adopt the SDM scheme, the terminal device can 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).

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

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

[0123] For example, in the case of an SFN scheme, since two panels use the same TPMI, number of layers, and DMRS port, the TPMI and the number of layers L may be determined based only on the first TPMI field, and the second TPMI field is reserved, that is, not used, or the UL DCI does not include the second TPMI field, that is, only the first TPMI field is included, and the DMRS port can be determined 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), where rank = L, whereby the TPMI, number of layers, and DMRS port in the SFN scheme can be determined. For example, the UL DCI further includes two SRI fields, each of which indicates two SRS resources associated with two panels. Thereby, it is possible to support the transmission of uplink data based on accurate uplink parameters under the SFN scheme.

[0124] The above has been described by taking codebook based PUSCH transmission as an example. Hereinafter, non-codebook based PUSCH transmission will be described.

[0125] In the case of non-codebook based PUSCH, the 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.

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

[0127] 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 method described above, and the detailed description thereof is omitted here.

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

[0129] In some embodiments, when transmitting uplink data using the first transmission scheme, the first number of layers is determined based on the first indication field, and the second number of layers is determined based on the second indication field, where the first number of layers and the second number of layers are the same or different, and based on the correspondence between the first number of layers, the second number of layers, and the DMRS port, the DMRS port is determined, where the second field is reserved. Hereinafter, examples will be given to explain the transmission of codebook based uplink data and non-codebook based uplink data, respectively.

[0130] Hereinafter, the description will be given by taking codebook based PUSCH transmission as an example.

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

[0132] In some 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, and the bit width of the second indication field is equal to the bit width of the first indication field.

[0133] FIG. 5 is another example of determining the layer number and the DMRS port in an embodiment of the present invention. For example, the first indication field is the first TPMI field, the second indication field is the second TPMI field, 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, and the SFN scheme. In FIG. 5, the sTRP scheme and the mTRP scheme are taken as examples.

[0134] For example, in the case of 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 maximum bit width among three schemes. For example, the method for determining the bit width of the second TPMI field is the same as described above, and the detailed description thereof is omitted here.

[0135] As shown in FIG. 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) based on Table 21 below. In other words, since (L1, L2) has a one-to-one mapping relationship with the DMRS port, the terminal device can determine the DMRS port based on the pre-defined mapping relationship, and the antenna ports field is a reserved field and is not used. For example, Table 21 may be set in a pre-defined manner, and the present invention does not limit this.

[0136]

Table 21

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

[0138] Above, the codebook based PUSCH transmission has been described by way of example. Hereinafter, the non-codebook based PUSCH transmission will be described.

[0139] In the case of non-codebook based PUSCH, the TPMI does not need to be indicated, 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.

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

[0141] 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 method described above, and the detailed description thereof is omitted here.

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

[0143] When transmitting uplink data using the first transmission scheme, determine the DMRS port based on the second field, and determine the first layer number and the second layer number of the first transmission scheme based on the correspondence between the DMRS port and the number of layers. 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. Hereinafter, examples will be given to explain the transmission of codebook based uplink data and non-codebook based uplink data respectively.

[0144] Hereinafter, the PUSCH transmission based on codebook will be taken as an example for explanation.

[0145] 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, and 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.

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

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

[0148] In some embodiments, for example, in the case of the SDM scheme, the DMRS port and (L1, L2) are determined based on the antenna ports field, for example, based on one new look-up table (for example, Table 22 below), and the antenna ports field indicates the settings of a certain DMRS port, L1, and L2 in the look-up table, that is, it indicates a certain row.

[0149] [Table 22] 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, and 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 FIG. 7, in the case of the SDM scheme, the bit width of its antenna ports field is smaller than the bit width of the antenna ports field of sTRP or mTRP. To support dynamic switching between the SDM scheme, sTRP scheme, and mTRP scheme, the bit width of the antenna ports field is equal to the maximum bit width of the antenna ports fields in the SDM scheme, sTRP scheme, and mTRP. Therefore, when the bit width required for the antenna ports field in a specific scheme is small, bit stuffing is performed on it.

[0150] 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, and 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.

[0151] For example, as shown in FIG. 7, on 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 scheme also indicates the second TPMI under the condition that L2 is known, the second TPMI fields in the SDM scheme and the mTRP scheme have the same bit width, and the second TPMI fields in the SDM scheme and the mTRP scheme are the same as the number of bits in Table 4 above.

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

[0153] Hereinafter, a method for determining the bit width of the second field will be described with examples.

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

[0155] For example, in the case of the second transmission scheme, since the antenna ports field is determined based on Table 5 - Table 8 above, the bit width required for the antenna ports field is 3 bits. In the case of the first transmission scheme, since the antenna ports field is determined based on Table 22, the bit width required for the antenna ports field is 2 bits. To support the terminal device to perform dynamic switching between the first transmission scheme and the second transmission scheme, the bit width of the antenna ports field needs to be equal to the maximum value of the above - mentioned bit widths. For example, the above - mentioned maximum value is 3 bits. Therefore, the bit width of the antenna ports field becomes 3 bits.

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

[0157] For example, the above - mentioned certain scheme is the SDM scheme. As described above, the bit width (2 bits) of the antenna ports field of the scheme is smaller than the bit width (3 bits) of the antenna ports field. When the terminal device uses the scheme, the most significant digit 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 is still determined to correspond to the second row of Table 22 according to the bit value of "01".

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

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

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

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

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

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

[0164]

Table 23

[0165] For example, the second TPMI field indicates the second TPMI under the condition that L2 is known, and the first TPMI field indicates the first TPMI under the condition that L1 is known. Both fields indicate the TPMI based on Table 23. Therefore, the second TPMI field and the first TPMI field have the same bit width.

[0166] Hereinafter, the method for determining the bit width of the first TPMI field will be described with examples.

[0167] In some embodiments, the bit width of the first TPMI field is determined based on the maximum value of the bit widths required by a plurality of schemes.

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

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

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

[0171] For example, the above-mentioned certain scheme is the SDM scheme. As described above, the bit width of the first TPMI field of the scheme (as shown in Table 4) is smaller than the bit width of the first TPMI field (as shown in Table 2). When the terminal device uses the scheme, the most significant digit 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. Specifically, the above-mentioned method can be referred to, and the detailed description is omitted here.

[0172] The following describes a method for determining the bit width of the second TPMI field with examples.

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

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

[0175] For example, in the case of the mTRP scheme, the second TPMI field is determined based on Table 3, and the bit width required for the second TPMI field is as shown in Table 4 (i.e., 5 bits, 4 bits, 3 bits). In the case of the SDM scheme, the second TPMI field is determined based on Table 23, and the bit width required for the second TPMI field is as shown in Table 4 (i.e., 5 bits, 4 bits, 3 bits). In the case of the sTRP scheme, there is no need to use the second TPMI field. To support the terminal device to perform dynamic switching between the first transmission scheme and the second transmission scheme, the bit width of the second TPMI field needs to be equal to the maximum value of the above-mentioned bit widths. For example, since Table 2 includes the maximum value of the above-mentioned bit widths, the bit width required for the first TPMI field is as shown in Table 4 (i.e., 5 bits, 4 bits, 3 bits).

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

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

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

[0179] For non-codebook based PUSCH, the 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.

[0180] FIG. 8 is a diagram showing another example for determining the number of layers and DMRS ports in an embodiment of the present invention. For example, similar to the aforementioned codebook based PUSCH, (L1, L2) and the DMRS port are determined based on the antenna ports field. Then, the first SRI field and the second SRI field respectively indicate the first SRI and the second SRI under the condition that L1 and L2 are known. Note that the method for determining the bit widths of the second field, the first SRI field, and the second SRI field is the same as the method described above, and the detailed description thereof is omitted here. For the specific content of the indication of the first SRI and the second SRI by the first SRI field and the second SRI field, reference can be made to the prior art, and the present invention does not limit this.

[0181] The above embodiments are for illustrative purposes to explain the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications can also be made based on the above embodiments. For example, each of the above embodiments can be used alone, or a plurality of the above embodiments can be combined and used.

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

[0183] <Embodiment of the second aspect> In the embodiments of the present invention, an uplink data reception method is provided, which is applied to the network device side. The embodiments of the present invention can be combined with the embodiments of the first aspect or implemented alone. Here, the description of the same content as in the embodiments of the first aspect is omitted.

[0184] FIG. 9 is a diagram showing an uplink data reception method in an embodiment of the present invention. As shown in FIG. 9, the method includes the following steps, that is, 901: Transmit downlink control information; and 902: Receive uplink data transmitted in the first transmission scheme or the second transmission scheme. Among them, the terminal device determines the number of layers and DMRS ports based on the downlink control information, and transmits the uplink data in the first transmission scheme or the second transmission scheme. Among them, a first SRS resource set and a second SRS resource set are set for the terminal device.

[0185] It should be noted that the above FIG. 9 is for illustrative purposes of the embodiments of the present invention, but the present invention is not limited thereto. For example, the execution order between each step can be adjusted, or several steps can be increased or decreased. That is, those skilled in the art can make appropriate modifications based on the above content without being limited to the description of FIG. 9 above.

[0186] The above embodiments are for illustrative purposes to explain the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications can also be made based on the above embodiments. For example, each of the above embodiments can be used alone, or a plurality of the above embodiments can be combined and used.

[0187] As can be seen from the above embodiments, the terminal device can determine the number of layers and DMRS ports based on the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible instructions for parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Also, since the terminal device can transmit uplink data using appropriate uplink transmission parameters, the throughput or reliability of uplink data transmission can be guaranteed.

[0188] <Embodiment of the third aspect> In an embodiment of the present invention, an uplink data transmission device is provided. The device may be, for example, a terminal device, or one or more components or assemblies provided in the terminal device. The terminal device has a first SRS resource set and a second SRS resource set configured. Here, the description of the same content as in the embodiments of the first to second aspects is omitted.

[0189] FIG. 10 is a diagram showing an uplink data transmission device in an embodiment of the present invention.

[0190] As shown in FIG. 10, the uplink data transmission device 1000 includes the following, that is, Receiving unit 1001: Receives downlink control information; and Transmitting unit 1002: Determines the number of layers and DMRS ports based on the downlink control information, and transmits uplink data using the first transmission scheme or the second transmission scheme.

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

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

[0193] 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, the first number of layers or the first SRS resource set is associated with the first CDM group and the DMRS ports included therein, the 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.

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

[0195] In some embodiments, when transmitting uplink data using the first transmission scheme, determine the first number of layers based on the first indication field, determine the second number of layers based on the second indication field, wherein the first number of layers and the second number of layers are the same or different, and determine the DMRS ports based on the correspondence between the first number of layers, the second number of layers, and the DMRS ports, wherein the second field is reserved.

[0196] 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.

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

[0198] In some embodiments, when transmitting uplink data using the first transmission scheme, determine the DMRS ports based on the second field, and determine the first number of layers and the second number of layers of the first transmission scheme based on the correspondence between the DMRS ports and the number of layers.

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

[0200] 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.

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

[0202] In some 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.

[0203] 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.

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

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

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

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

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

[0209] In some embodiments, the downlink control information includes two SRS resource indicator (SRI) fields, and among them, the number of SRS ports of the two SRS resources indicated by the two SRS resource indicator fields is the same.

[0210] The above embodiments are used to exemplarily illustrate the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications can also be made based on the above embodiments. For example, each of the above embodiments can be used alone, or a plurality of the above embodiments can be combined and used.

[0211] It should be noted that only the components or modules according to the present invention are described above, but the present invention is not limited thereto. The uplink data transmission device 1000 may further include other components or modules, and the specific content of these components or modules can refer to related technologies.

[0212] Also, for the sake of convenience, only the connection relationship or signal direction between each component or module is shown in FIG. 10. However, as can be understood by those skilled in the art, various related technologies such as bus connection can also be adopted. These components or modules can be realized by hardware such as a processor, a memory, a transmitter, and a receiver, but the implementation of the present invention is not limited thereto.

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

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

[0215] FIG. 11 is a diagram showing an uplink data receiving device in an embodiment of the present invention. As shown in FIG. 11, the uplink data receiving device 1100 includes the following, that is, Transmission unit 1101: Transmits downlink control information; and Receiving unit 1102: Receives uplink data transmitted in the first transmission scheme or the second transmission scheme, wherein the terminal device determines the number of layers and DMRS ports based on the downlink control information, and transmits the uplink data in the first transmission scheme or the second transmission scheme, and a first SRS resource set and a second SRS resource set are set for the terminal device.

[0216] The above embodiments are for illustrative purposes to explain the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications can also be made based on the above embodiments. For example, each of the above embodiments may be used alone, or a plurality of the above embodiments may be combined and used.

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

[0218] Also, for the sake of convenience, only the connection relationship or signal direction between the components or modules is shown in FIG. 11. As can be understood by those skilled in the art, various related technologies such as bus connection may be adopted. These components or modules can be realized by hardware such as a processor, a memory, a transmitter, and a receiver, but the implementation of the present invention is not limited thereto.

[0219] As can be seen from the above embodiments, the terminal device can determine the number of layers and DMRS ports based on the received downlink control information, and transmit uplink data using a specific transmission scheme. In this way, flexible instructions for parameters such as the number of layers and DMRS ports can be realized, and dynamic switching between different transmission schemes can be supported. Also, since the terminal device can transmit uplink data using appropriate uplink transmission parameters, the throughput or reliability of uplink data transmission can be guaranteed.

[0220] <Embodiment of the Fifth Aspect> In an embodiment of the present invention, a communication system is further provided. For example, reference can be made to FIG. 1. Here, the description of the same content as in the embodiments of the first to fourth aspects is omitted.

[0221] In some embodiments, the communication system 100 includes at least the following, that is, Network device: transmitting downlink control information; and Terminal device: A first SRS resource set and a second SRS resource set are set, the number of layers and DMRS ports are determined based on the downlink control information, and the uplink data is transmitted using the first transmission scheme or the second transmission scheme. The network device receives the uplink data transmitted using the first transmission scheme or the second transmission scheme.

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

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

[0224] Also, as shown in FIG. 12, the network device 1200 may further include a transceiver 1240, an antenna 1250, etc. Among them, the functions of these components are the same as those in the prior art, and the detailed description thereof is omitted here. Note that the network device 1200 does not necessarily include all the components shown in FIG. 12. Also, the network device 1200 may further include components not shown in FIG. 12, and reference may be made to the prior art for this.

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

[0226] FIG. 13 is a diagram showing a terminal device according to an embodiment of the present invention. As shown in FIG. 13, the terminal device 1300 may include a processor 1310 and a memory 1320. The memory 1320 stores data and programs and is connected to the processor 1310. Note that this figure is merely an example, and an electrical communication function or other functions may be realized by supplementing or replacing this configuration with other types of configurations.

[0227] For example, the processor 1310 may be configured to execute a program to implement the uplink data transmission method described in the embodiment of the first aspect. For example, the processor 1310 may be configured to perform the following control, that is, a first SRS resource set and a second SRS resource set are set, downlink control information is received, the number of layers and DMRS ports are determined based on the downlink control information, and uplink data is transmitted using a first transmission scheme or a second transmission scheme.

[0228] As shown in FIG. 13, the terminal device 1300 may further include a communication module 1330, an input unit 1340, a display 1350, a power supply 1360, and the like. Among them, the functions of these components are the same as those in the prior art, and the detailed description thereof is omitted here. Note that the terminal device 1300 does not necessarily include all the components shown in FIG. 13. In addition, the terminal device 1300 may further include components not shown in FIG. 13, and reference may be made to the prior art for this.

[0229] In an embodiment of the present invention, a computer program is further provided. When the program is executed on a terminal device, the program causes the terminal device to execute the uplink data transmission method described in the embodiment of the first aspect.

[0230] In an embodiment of the present invention, a storage medium storing a computer program is further provided. The computer program causes a terminal device to execute the uplink data transmission method described in the embodiment of the first aspect.

[0231] In an embodiment of the present invention, a computer program is further provided. When the program is executed on a terminal device, the program causes the terminal device to execute the uplink data reception method described in the embodiment of the second aspect.

[0232] In an embodiment of the present invention, a storage medium storing a computer program is further provided. The computer program causes a terminal device to execute the uplink data reception method described in the embodiment of the second aspect.

[0233] Also, the above-described apparatus and method may be implemented by software or hardware, or may be implemented by a combination of hardware and software. The present invention further relates to a computer-readable program as follows, that is, when the program is executed by a logic component, the logic component implements the above-described apparatus or component, or the logic component implements each of the above-described methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, a processor used in a computer, or the like. The present invention further relates to a storage medium storing the above-described program, for example, a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, or the like.

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

[0235] As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to such embodiments, and any changes to the present invention belong to the technical scope of the present invention as long as they do not depart from the spirit of the present invention.

[0236] Also, regarding the above-described embodiments and the like, the following supplementary notes are disclosed.

[0237] (Supplementary Note 1) An uplink data transmission method applied to a terminal device, wherein a first sounding reference signal (SRS) resource set and a second SRS resource set are set in the terminal device, the method comprising: the terminal device receiving downlink control information; and determining the number of layers and DMRS ports based on the downlink control information, and transmitting uplink data using a first transmission scheme or a second transmission scheme.

[0238] (Supplementary Note 2) The method according to Supplementary Note 1, The first transmission scheme includes an SDM scheme, The second transmission scheme includes one of an sTRP scheme, an mTRP scheme, an FDM scheme, and an SFN scheme, The downlink control information includes a first field and a second field, The first field includes a first indication field and / or a second indication field, a method.

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

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

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

[0242] (Appendix 6) The method according to Appendix 2, wherein when transmitting the uplink data using the first transmission scheme, determining a first number of layers based on the first indication field, determining a second number of layers based on the second indication field, and the first number of layers and the second number of layers are the same or different; determining the DMRS ports based on the correspondence between the first number of layers, the second number of layers, and the DMRS ports; the second field is reserved. A method.

[0243] (Appendix 7) The method according to any one of Appendices 3 to 6, 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. A method.

[0244] (Appendix 8) The method according to Appendix 7, wherein 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. A method.

[0245] (Appendix 9) The method according to any one of Appendices 3 to 6, wherein the bit width of the second indication field is equal to the bit width of the first indication field. A method.

[0246] (Appendix 10) The method according to Appendix 2, wherein when transmitting the uplink data using the first transmission scheme, determining the DMRS ports based on the second field; determining a first number of layers and a second number of layers of the first transmission scheme based on the correspondence between the DMRS ports and the number of layers. A method.

[0247] (Appendix 11) The method according to Appendix 10, wherein A method in which the first indication field is determined under the condition that the first number of layers is known, and the second indication field is determined under the condition that the second number of layers is known.

[0248] (Appendix 12) The method according to Appendix 10 or 11, A method in which 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.

[0249] (Appendix 13) The method according to Appendix 12, A method in which 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.

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

[0251] (Appendix 15) The method according to Appendix 10 or 11, A method in which 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.

[0252] (Appendix 16) The method according to Appendix 15, A method in which 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.

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

[0254] (Appendix 18) A method according to any one of Appendices 2-17, 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, wherein the second field is an antenna port field, a method.

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

[0256] (Appendix 20) A method according to Appendix 19, when transmitting codebook based uplink data in the SFN scheme, determining the number of layers and the TPMI based on the first TPMI field, and the second TPMI field is reserved or does not exist; and determining the DMRS port based on the number of layers and the antenna port field, a method.

[0257] (Appendix 21) The method described in Appendix 20, wherein the downlink control information includes two SRS resource indicator (SRI) fields, and among them, the SRS port numbers of the two SRS resources indicated by the two SRS resource indicator fields are the same.

[0258] (Appendix 22) An uplink data receiving method, applicable to a network device, wherein the method includes the network device transmitting downlink control information; and the network device receiving uplink data transmitted in a first transmission scheme or a second transmission scheme, wherein a terminal device determines a number of layers and DMRS ports based on the downlink control information, and transmits the uplink data in the first transmission scheme or the second transmission scheme, and a first SRS resource set and a second SRS resource set are set in the terminal device.

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

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

[0261] (Appendix 25) A communication system, including network equipment that transmits downlink control information, further including terminal equipment in which a first SRS resource set and a second SRS resource set are configured, determining the number of layers and DMRS ports based on the downlink control information, and transmitting the uplink data using a first transmission scheme or a second transmission scheme, wherein the network equipment receives the uplink data transmitted using the first transmission scheme or the second transmission scheme. A communication system.

Claims

1. An uplink data transmission device, which is arranged in a terminal device, wherein a first SRS resource set (SRS resource set) and a second SRS resource set (SRS resource set) are set in the terminal device, the uplink data transmission device comprising: a receiving unit configured to receive downlink control information; and a transmitting unit configured to determine a number of layers and DMRS ports based on the downlink control information and transmit uplink data using a first transmission scheme or a 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 multi-transmission and reception point (mTRP) sTRP scheme, a frequency division multiplexing (FDM) scheme, and a single-frequency network (SFN) scheme, the downlink control information includes a first field and a second field, and the first field includes a first indication field and / or a second indication field.

3. The device according to claim 2, wherein when transmitting the uplink data using the first transmission scheme, a first number of layers is determined based on the first indication field, a second number of layers is determined based on the second indication field, and the first number of layers and the second number of layers may be the same or different, and the DMRS ports are determined based on 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 at least two of the 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 layer number or the first SRS resource set is associated with the first CDM group and the DMRS ports included therein, and the second layer number or the second SRS resource set is associated with the second CDM group and the DMRS ports included therein. The first CDM group is the CDM group to which the first DMRS port among at least two of the DMRS ports belongs, the device.

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

6. The device according to claim 2, When transmitting the uplink data with the first transmission scheme, determining a first layer number based on the first indication field, determining a second layer number based on the second indication field, the first layer number and the second layer number being the same or different, Determining the DMRS ports based on the correspondence between the first layer number, the second layer number, and the DMRS ports, The second field is reserved, the device.

7. The device according to claim 3, 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 device.

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

9. The device according to claim 2, When transmitting the uplink data with the first transmission scheme, determining the DMRS ports based on the second field, Determining the first layer number and the second layer number of the first transmission scheme based on the correspondence between the DMRS ports and the layer numbers, the device.

10. The device according to claim 9, 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, the device.

11. The device according to claim 9, 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, An apparatus, wherein 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.

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

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

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

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

17. The apparatus according to claim 16, wherein when transmitting codebook-based uplink data, the first indication field is a first TPMI field, and / or the second indication field is a second TPMI field, and wherein when transmitting non-codebook-based uplink data, the first indication field is a first SRI field, and / or the second indication field is a second SRI field.

18. The apparatus according to claim 17, When transmitting codebook-based uplink data with the SFN scheme, the number of layers and the TP MI are determined based on the first TP MI field, and the second TP MI field is reserved or does not exist. An apparatus for determining the DMRS port based on the number of layers and the antenna port field. Claim 19 The apparatus according to claim 18, wherein the downlink control information includes two SRS resource indicator (SRI) fields, and the number of SRS ports of two SRS resources indicated by the two SRS resource indicator fields is the same. Claim 20 An uplink data receiving apparatus, disposed in a network device, wherein the uplink data receiving apparatus comprises a transmission unit for transmitting downlink control information; and a reception unit for receiving uplink data transmitted in a first transmission scheme or a second transmission scheme, wherein a terminal device determines the number of layers and the DMRS port based on the downlink control information, and transmits the uplink data in the first transmission scheme or the second transmission scheme, and a first SRS resource set and a second SRS resource set are set in the terminal device.

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