Method, terminal equipment and network equipment for uplink data transmission

Abstract

Embodiments of the present application relate to methods, terminal devices, and network devices for uplink data transmission. The method comprises: receiving subset constraint indication information of SRS resources sent by a network device, the subset constraint indication information being used to indicate at least one available SRS resource subset; determining the length of the SRI in the DCI sent by the network device for scheduling uplink data transmission according to the subset constraint indication information; determining the target SRI from the DCI according to the length of the SRI; determining the target SRS resource subset corresponding to the target SRI in the at least one available SRS resource subset; determining the transmission parameters used for the uplink data transmission according to the target SRS resource subset. The method, terminal device, and network device for uplink data transmission of the embodiments of the present application can reduce the overhead of SRI.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a method, a terminal device, and a network device for uplink data transmission. Background Art

[0002] In the new radio (NR) system, terminal devices can use multiple antenna array blocks (panels) for uplink data transmission. A panel contains a group of physical antennas, and each panel has an independent RF channel. Terminal devices can transmit data on multiple panels at the same time, but because the channel conditions corresponding to different panels are different, different panels need to use different transmission parameters according to their respective channel information.

[0003] In order to obtain these transmission parameters, different sounding reference signal (SRS) resources need to be configured for different panels to obtain uplink channel information. For example, one panel can correspond to one SRS resource set, where each SRS resource can be used to obtain the transmission parameters of a physical uplink shared channel (PUSCH) transmission on the panel, or to obtain the transmission parameters of a transmission layer on the PUSCH. The network device needs to indicate one or more SRS resources through an SRS Resource Indicator (SRI), and the one or more SRS resources can be used to obtain the transmission parameters of the current uplink data transmission.

[0004] However, in some application scenarios, some SRS resources or SRI indication states are unavailable, and the network device will not indicate corresponding information to the terminal device, thus wasting some SRI overhead. Summary of the invention

[0005] The present application provides a method, terminal equipment and network equipment for uplink data transmission, which can reduce the SRI overhead.

[0006] In a first aspect, a method for uplink data transmission is provided, the method comprising: receiving subset constraint indication information of SRS resources sent by a network device, the subset constraint indication information being used to indicate at least one available SRS resource subset; determining, according to the subset constraint indication information, the length of SRI in downlink control information (DCI) sent by the network device for scheduling uplink data transmission; determining, according to the length of the SRI, a target SRI from the DCI; determining, among the at least one available SRS resource subset, a target SRS resource subset corresponding to the target SRI; and determining, according to the target SRS resource subset, a transmission parameter used for the uplink data transmission.

[0007] Therefore, in the method for uplink data transmission in an embodiment of the present application, a terminal device receives subset constraint indication information sent by a network device for indicating an available SRS resource subset, determines the length of a target SRI in a DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines a target SRS resource subset corresponding to the target SRI in at least one available SRS resource subset, and determines a corresponding transmission parameter for uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0008] In combination with the first aspect, in an implementation manner of the first aspect, each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

[0009] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, the method also includes: receiving resource set indication information sent by the network device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0010] In combination with the first aspect and its above-mentioned implementation manner, in another implementation manner of the first aspect, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0011] In combination with the first aspect and the above-mentioned implementation manner, in another implementation manner of the first aspect, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0012] In combination with the first aspect and the above-mentioned implementation manner, in another implementation manner of the first aspect, the method further includes: determining at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0013] Optionally, determining at least one preconfigured SRS resource combination includes: receiving resource combination indication information sent by a network device, where the resource combination indication information includes the at least one SRS resource combination.

[0014] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0015] In combination with the first aspect and the above implementation manner, in another implementation manner of the first aspect, the at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

[0016] In combination with the first aspect and the above-mentioned implementation manner, in another implementation manner of the first aspect, determining the length of the SRI according to the subset constraint indication information includes: determining the length of the SRI according to the number of the at least one available SRS resource subset.

[0017] In combination with the first aspect and the above implementation manner, in another implementation manner of the first aspect, determining the length of the SRI according to the number of the at least one available SRS resource subset includes: determining that the length of the SRI is equal to in, represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0018] In combination with the first aspect and the above-mentioned implementation manner, in another implementation manner of the first aspect, the method also includes: determining the correspondence between the SRI value and the at least one available SRS resource subset according to the subset constraint indication information; determining the target SRS resource subset corresponding to the target SRI in the at least one available SRS resource subset, including: determining the target SRS resource subset corresponding to the target SRI from the at least one available SRS resource subset according to the correspondence between the SRI value and the at least one available SRS resource subset.

[0019] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter and at least one of an antenna array block.

[0020] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: determining the number of antenna ports and target precoding matrix indicator (PMI) information of the target SRS resource subset; and determining, based on the correspondence between the number of antenna ports, PMI information and the precoding matrix, the precoding matrix corresponding to the number of antenna ports of the target SRS resource subset and the target PMI information as the precoding matrix used for the uplink data transmission.

[0021] In combination with the first aspect and the above implementation manner, in another implementation manner of the first aspect, the DCI includes the target PMI information.

[0022] Therefore, based on this method, a precoding matrix used for uplink data transmission scheduled by DCI is obtained, so that data transmission on different panels can use independent precoding matrices, thereby increasing the flexibility of uplink scheduling.

[0023] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: determining the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of transmission layers for the uplink data transmission.

[0024] Optionally, if the target SRS resource subset is one SRS resource, the number of antenna ports of the one SRS resource is determined as the number of transmission layers for uplink data transmission.

[0025] Optionally, if the target SRS resource subset is an SRS resource combination, the number of SRS resources included in the SRS resource combination is determined as the number of transmission layers for uplink data transmission.

[0026] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: determining the precoding matrix used to transmit the SRS in the target SRS resource subset as the precoding matrix used for the uplink data transmission.

[0027] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, the target SRS resource subset is a target SRS resource combination, and the number of SRS resources in the target SRS resource combination is K, where K is equal to the number of data transmission layers corresponding to the uplink data transmission; the precoding matrix used to transmit the SRS in the target SRS resource subset is determined as the precoding matrix used for the uplink data transmission, including: determining the precoding matrix used for each SRS resource in the target SRS resource combination to obtain K precoding matrices; determining the K precoding matrices as precoding matrices of the K data transmission layers, and the K precoding matrices correspond one-to-one to the K data transmission layers.

[0028] Therefore, uplink transmission corresponding to different SRS resources can use the same precoding matrix as that on the SRS resource, so as to match the channel information of the panel transmitting the corresponding data.

[0029] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: determining the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of antenna ports used for the uplink data transmission.

[0030] For example, if the target SRS resource subset is one target SRS resource, the terminal device may use the number of antenna ports of the target SRS resource as the number of antenna ports used for uplink data transmission.

[0031] For another example, if the target SRS resource subset is a target SRS combination, and the target SRS combination includes multiple SRS resources, each of which is a single-port SRS resource, the terminal device can determine the number of the multiple SRS resources as the number of antenna ports used for uplink data transmission.

[0032] Therefore, the method is used to obtain the number of antenna ports for uplink data transmission, so that data transmission on different panels can use independent numbers of antenna ports, thereby improving the flexibility of uplink multi-panel scheduling.

[0033] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: determining the beam for sending the SRS in the target SRS resource subset as the beam used for the uplink data transmission.

[0034] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, the target SRS resource subset is a target SRS resource combination, and the number of SRS resources in the target SRS resource combination is K, where K is equal to the number of data transmission layers corresponding to the uplink data transmission; the beam that will receive or send the SRS in the target SRS resource subset is determined as the beam used for the uplink data transmission, including: determining K transmission beams used to send the SRS in the target SRS resource combination; using the K transmission beams as the transmission beams of the K data transmission layers, and the K transmission beams correspond one-to-one to the K data transmission layers.

[0035] Therefore, uplink transmissions corresponding to different reference signal resources may use different beams to match the channel information of the panel transmitting the corresponding data.

[0036] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: based on the correspondence between the SRS resource subset and the power control parameter, determining the power control parameter corresponding to the target SRS resource subset as the power control parameter used for the uplink data transmission.

[0037] In combination with the first aspect and the above-mentioned implementation manner, in another implementation manner of the first aspect, the method further includes: according to the correspondence between SRI and the power control parameter, determining the power control parameter corresponding to the target SRI as the power control parameter used for the uplink data transmission.

[0038] In combination with the first aspect and the above implementation manner, in another implementation manner of the first aspect, the power control parameter includes at least one of: an open-loop power control parameter, a closed-loop power control parameter and a path loss estimation value.

[0039] Therefore, uplink transmissions corresponding to different reference signal resources may use different transmit powers, so as to match the channel gain of the beam or panel transmitting the corresponding data.

[0040] In combination with the first aspect and its above-mentioned implementation method, in another implementation method of the first aspect, determining the transmission parameters used for the uplink data transmission based on the target SRS resource subset includes: determining the antenna array block that sends the SRS in the target SRS resource subset as the antenna array block used for the uplink data transmission.

[0041] For example, the target SRS resource subset is an SRS resource combination, and the terminal device determines the panel used when sending the SRS on the SRS resource combination as the panel for transmitting the uplink data.

[0042] Therefore, different panels may be used for uplink transmission corresponding to different reference signal resources, so that data can be transmitted on a better panel according to the reference signal, or multiple panels of the terminal can be fully utilized to transmit data simultaneously, thereby improving uplink transmission performance.

[0043] Therefore, in the method for uplink data transmission in an embodiment of the present application, a terminal device receives subset constraint indication information sent by a network device for indicating an available SRS resource subset, determines the length of a target SRI in a DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines a target SRS resource subset corresponding to the target SRI in at least one available SRS resource subset, and determines a corresponding transmission parameter for uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0044] In a second aspect, a method for uplink data transmission is provided, the method comprising: sending subset constraint indication information of a sounding reference signal SRS resource to a terminal device, the subset constraint indication information being used to indicate at least one available SRS resource subset; determining, according to the subset constraint indication information, the length of SRI contained in downlink control information DCI for scheduling uplink data transmission; determining, among the at least one available SRS resource subset, a target SRS resource subset, the target SRS resource subset being used by the terminal device to determine transmission parameters used for the uplink data transmission; and sending, according to the length of the SRI, the DCI including the target SRI to the terminal device, the target SRI being used to indicate the target SRS resource subset.

[0045] Therefore, in the method for uplink data transmission in an embodiment of the present application, a network device sends subset constraint indication information indicating an available SRS resource subset to a terminal device, and determines a target SRS resource based on the subset constraint indication information and the available SRS resource subset, and determines a target SRI in a DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device determines the corresponding transmission parameters of the uplink data transmission based on the target SRS resource subset. In this way, the SRI indication content can be limited according to the currently available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0046] In combination with the second aspect, in an implementation manner of the second aspect, each SRS resource subset of the at least one available SRS resource subset is an SRS resource.

[0047] In combination with the second aspect and its above-mentioned implementation method, in another implementation method of the second aspect, the method also includes: sending resource set indication information to the terminal device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0048] In combination with the second aspect and its above-mentioned implementation method, in another implementation method of the second aspect, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0049] In combination with the second aspect and the above-mentioned implementation manner, in another implementation manner of the second aspect, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0050] In combination with the second aspect and the above-mentioned implementation manner, in another implementation manner of the second aspect, the method further includes: determining at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0051] In combination with the second aspect and its above-mentioned implementation method, in another implementation method of the second aspect, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0052] In combination with the second aspect and the above implementation manner, in another implementation manner of the second aspect, the at least one SRS resource combination includes all combinations between SRS resources in an SRS resource set.

[0053] In combination with the second aspect and its above-mentioned implementation method, in another implementation method of the second aspect, determining the length of the SRI contained in the DCI used to schedule uplink data transmission based on the subset constraint indication information includes: determining the length of the SRI based on the number of the at least one available SRS resource subset.

[0054] In combination with the second aspect and the above implementation manner, in another implementation manner of the second aspect, determining the length of the SRI according to the number of the at least one available SRS resource subset includes: determining that the length of the SRI is equal to in, represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0055] In combination with the second aspect and its above-mentioned implementation method, in another implementation method of the second aspect, the method also includes: determining the correspondence between the SRI value and the at least one available SRS resource subset based on the subset constraint indication information; determining the target SRI corresponding to the target SRS resource subset based on the correspondence between the SRI value and the at least one available SRS resource subset.

[0056] In combination with the second aspect and its above-mentioned implementation method, in another implementation method of the second aspect, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter and at least one of an antenna array block.

[0057] Therefore, in the method for uplink data transmission in an embodiment of the present application, a network device sends subset constraint indication information indicating an available SRS resource subset to a terminal device, and determines a target SRS resource based on the subset constraint indication information and the available SRS resource subset, and determines a target SRI in a DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device determines the corresponding transmission parameters of the uplink data transmission based on the target SRS resource subset. In this way, the SRI indication content can be limited according to the currently available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0058] In a third aspect, a terminal device is provided, which is used to execute the method in the first aspect or any possible implementation of the first aspect. Specifically, the terminal device includes a unit for executing the method in the first aspect or any possible implementation of the first aspect.

[0059] In a fourth aspect, a network device is provided, which is used to execute the method in the second aspect or any possible implementation of the second aspect. Specifically, the network device includes a unit for executing the method in the second aspect or any possible implementation of the second aspect.

[0060] In a fifth aspect, a terminal device is provided, comprising: a memory and a processor, the memory being used to store instructions, the processor being used to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory, the execution causes the processor to execute the method in the first aspect or any possible implementation of the first aspect.

[0061] In a sixth aspect, a network device is provided, comprising: a memory and a processor, the memory being used to store instructions, the processor being used to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory, the execution causes the processor to execute the method in the second aspect or any possible implementation of the second aspect.

[0062] In a seventh aspect, a computer-readable medium is provided for storing a computer program, wherein the computer program includes instructions for executing the method in the first aspect or any possible implementation of the first aspect.

[0063] In an eighth aspect, a computer-readable medium is provided for storing a computer program, wherein the computer program includes instructions for executing the method in the second aspect or any possible implementation of the second aspect.

[0064] In a ninth aspect, a computer program product including instructions is provided, and when a computer runs the instructions of the computer program product, the computer executes the method for uplink data transmission in the first aspect or any possible implementation of the first aspect. Specifically, the computer program product can be run on the terminal device of the third aspect.

[0065] In a tenth aspect, a computer program product including instructions is provided, and when a computer runs the instructions of the computer program product, the computer executes the method for uplink data transmission in the second aspect or any possible implementation of the second aspect. Specifically, the computer program product can be run on the network device of the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1It is a schematic flowchart of a method for uplink data transmission according to an embodiment of the present application.

[0067] Figure 2 is another schematic flowchart of a method for uplink data transmission according to an embodiment of the present application.

[0068] Figure 3 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0069] Figure 4 It is a schematic block diagram of a network device according to an embodiment of the present application.

[0070] Figure 5 is another schematic block diagram of a terminal device according to an embodiment of the present application.

[0071] Figure 6 is another schematic block diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0073] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: global system of mobile communication (GSMC) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), etc.

[0074] The terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile communication network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0075] The network device in the embodiment of the present application can be a device for communicating with a terminal device. The network device can be a base station (base transceiver station, BTS) in a GSMC system or CDMA, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (evolutional NodeB, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0076] Figure 1 FIG. 1 is a schematic flow chart of a method 100 for uplink data transmission according to an embodiment of the present application, and the method 100 may be executed by a terminal device. Figure 1 As shown, the method 100 includes: S110, receiving subset constraint indication information of SRS resources sent by a network device, the subset constraint indication information is used to indicate at least one available SRS resource subset; S120, determining the length of SRI in the downlink control information DCI sent by the network device for scheduling uplink data transmission according to the subset constraint indication information; S130, determining the target SRI from the DCI according to the length of the SRI; S140, determining the target SRS resource subset corresponding to the target SRI in the at least one available SRS resource subset; S150, determining the transmission parameters used for the uplink data transmission according to the target SRS resource subset.

[0077] In an embodiment of the present application, a terminal device receives subset constraint indication information sent by a network device, and the subset constraint indication information is used to indicate at least one available SRS resource subset, each SRS resource subset in the at least one available SRS resource subset can be an SRS resource or an SRS resource combination, and each SRS resource combination can include multiple SRS resources.

[0078] Optionally, as an embodiment, each SRS resource subset in the at least one available SRS resource subset can be an SRS resource, that is, the at least one available SRS resource subset is at least one available SRS resource. Correspondingly, the terminal device can determine at least one SRS resource set, and determine at least one available SRS resource in the at least one SRS resource set based on the subset constraint indication information, and the at least one available SRS resource can be used for PUSCH transmission of the current terminal device.

[0079] Specifically, the network device may configure at least one SRS resource set for the terminal device, and the at least one SRS resource set includes N SRS resources. For example, the terminal device receives resource set indication information sent by the network device, and the resource set indication information indicates the at least one SRS resource set. The terminal device indicates that M SRS resources among the N SRS resources are at least one available SRS resource according to the subset constraint indication information.

[0080] Optionally, the subset constraint indication information may be a resource indication bitmap, and the resource indication bitmap corresponds one-to-one to the N SRS resources included in the at least one SRS resource set, that is, the resource indication bitmap may include N bits, and each bit corresponds to one SRS resource among the N SRS resources. For example, if the bit value is "1", it indicates that the corresponding SRS resource is enabled. At least one available SRS resource can be obtained according to the resource indication bitmap, and the at least one available SRS resource can be used to transmit PUSCH.

[0081] Optionally, except for the M available SRS resources among the N SRS resources, the remaining NM SRS resources can also be used to send SRS, but are not used to obtain uplink channel state information (CSI) of PUSCH, and can be used for other purposes, for example, can be used for network equipment to obtain downlink channel information based on channel reciprocity, but the embodiments of the present application are not limited to this.

[0082] It should be understood that the SRS resource set in the embodiment of the present application may include at least one SRS resource, each SRS set is used for the same function, but different SRS resource sets may have different functions. Different SRS resources in the same SRS resource set have at least one same parameter, for example, the same parameter may be at least one of the following parameters: power control parameter, transmission bandwidth parameter, number of antenna ports, number of orthogonal frequency division multiplexing (OFDM) symbols occupied in a time slot, number of signal repetitions in a time slot, functional configuration, transmission time slot, but the embodiment of the present application is not limited to this. The network device can configure the same parameters for each SRS resource set, and there is no need to configure these parameters separately for each reference signal resource in the set, thereby saving signaling overhead.

[0083] Optionally, as an embodiment, each SRS resource subset in the at least one available SRS resource subset can be an SRS resource combination, that is, the at least one available SRS resource subset is at least one available SRS resource combination. Correspondingly, the terminal device can determine at least one preconfigured SRS resource combination, and each SRS resource combination can include multiple SRS resources. For example, the terminal device and the network device pre-agree on the at least one SRS resource combination, or the terminal device can receive resource combination indication information sent by the network device, and the resource combination indication information is used to indicate the at least one SRS resource combination. The terminal device determines at least one available SRS resource combination in the at least one SRS resource combination based on the subset constraint indication information, and the at least one available SRS resource combination can be used for PUSCH transmission of the current terminal device.

[0084] It should be understood that the SRS resources in the at least one SRS resource combination may come from one SRS resource set or from multiple SRS resource sets, and the configuration parameters of different SRS resource sets may be different.

[0085] For example, the at least one SRS resource combination may include all possible combinations of SRS resources in an SRS resource set.

[0086] For another example, the at least one SRS resource combination may also come from multiple SRS resource sets, wherein the SRS resources in each SRS resource combination belong to one SRS resource set.

[0087] It should be understood that the terminal device determines at least one available SRS resource combination from the at least one preconfigured SRS resource combination according to the subset constraint indication information, wherein the at least one available SRS resource combination may include one or more SRS resource sets.

[0088] For example, the SRS resource included in the at least one available SRS resource combination may be at least one SRS resource among the first n SRS resources of the predefined multiple SRS resources, or at least one SRS resource among the last n SRS resources.

[0089] For another example, the SRS resources included in the at least one available SRS resource combination may be SRS resources in one SRS resource set, or the SRS resources included in the at least one available SRS resource combination may also be SRS resources in multiple SRS resource sets.

[0090] It should be understood that the subset constraint indication information may include a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate at least one available SRS resource combination in the at least one SRS resource combination. For example, the length of the resource combination indication bitmap may be equal to the number of the at least one SRS resource combination.

[0091] For example, the network device pre-configures N single-port SRS resources for the terminal device, and the N SRS resources may include multiple SRS resource combinations, and the subset constraint indication information may be used to indicate at least one available SRS resource combination in the SRS resource combinations included in the N SRS resources. For example, assuming N=2, there may be three SRS resource combinations such as [0 1], [1 0], and [1 1], where 1 indicates that the corresponding SRS resource is in the combination and 0 indicates that it is not in the combination. At this time, through the subset constraint indication information, the network device can indicate the available SRS resource combinations in these possible combinations. For example, the network device can indicate in a bitmap manner, where each bit corresponds to a possible resource combination, such as bitmap=[1 1 0] indicating that only the first two combinations ([0 1], [1 0]) are available.

[0092] Therefore, the network device can limit the terminal device to use a single panel for the current uplink transmission (that is, the SRS resource combination only includes SRS resources of a single panel) through subset constraint indication information, thereby performing panel selection; or limit the terminal device to use multiple panels for the current uplink transmission at the same time (that is, the SRS resource combination needs to include SRS resources of multiple panels), thereby performing simultaneous panel transmission.

[0093] In S120, the terminal device may determine the length of the SRI in the downlink control information DCI sent by the network device for scheduling uplink data transmission according to the subset constraint indication information. Specifically, the terminal device may determine the length of the SRI in the DCI according to the number of at least one SRS resource subset indicated in the subset constraint indication information.

[0094] Specifically, the terminal device can determine the number of bits of SRI as Wherein, K is the number of the at least one available SRS resource subset, Indicates rounding up.

[0095] Optionally, the terminal device can also set the number of bits of SRI to be equal to the number of at least one available SRS resource subset, that is, the SRI is a bitmap, which corresponds one-to-one to an SRS resource subset in at least one available SRS resource subset, and determines whether the corresponding available SRS resource subset is the target SRS resource subset indicated by the SRI through the value of each bitmap.

[0096] In this way, since the subset constraint indication information can reduce the content indicated by the SRI, the number of bits of the SRI can be reduced.

[0097] In an embodiment of the present application, the terminal device may also determine different SRS resource subsets indicated by different SRIs according to the subset constraint indication information. Specifically, according to at least one available SRS resource subset indicated by the subset constraint indication information, the terminal device may determine the correspondence between different SRIs and different SRS resource subsets in the at least one available SRS resource subset, and each available SRS resource subset corresponds to one SRI.

[0098] For example, if N SRS resources are reserved between the terminal device and the network device, assuming N = 2, there may be three SRS resource combinations: [0 1], [1 0], [1 1], where 1 indicates that the corresponding SRS resource is in the combination, and 0 indicates that it is not in the combination. At this time, the network device can indicate the available SRS resource combinations in these possible combinations through the subset constraint indication information. For example, the network device can indicate in a bitmap manner, where each bit corresponds to a possible resource combination, such as bitmap = [1 1 0] indicates that only the first two combinations ([0 1], [1 0]) are available SRS resource combinations. Since the number of available SRS resource combinations is 2, according to the formula It can be seen that only 1 bit of SRI is needed to indicate the two available SRS resource combinations, for example, "1" is used to represent [1 0] in the available SRS resource combination; and "0" is used to represent

[10] in the available SRS resource combination.

[0099] In S130, the terminal device determines the target SRI from the DCI sent by the received network device according to the determined length of the SRI; in S140, the terminal device determines the SRS resource subset corresponding to the target SRI as the target SRS resource subset in the at least one available SRS resource subset according to the correspondence between the SRI and the available SRS resource subsets.

[0100] In this way, the terminal device and the network device use SRI to indicate the target SRS resource subset in the available SRS resource subset, which can reduce the indication content of some SRIs that will not be used, thereby reducing the overhead of SRI in the DCI.

[0101] In S150, the terminal device determines the transmission parameters used for the uplink data transmission scheduled by the DCI according to the target SRS resource subset, wherein the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and at least one of an antenna array block.

[0102] Optionally, as an embodiment, the terminal device may determine the precoding matrix used for the first uplink data transmission based on the correspondence between the number of antenna ports, PMI information, and the precoding matrix. Specifically, the terminal device determines the number of antenna ports and the target PMI information of the target SRS resource subset, and based on the correspondence between the number of antenna ports, PMI information, and the precoding matrix, uses the precoding matrix corresponding to the number of antenna ports and the target PMI information of the target SRS resource subset as the precoding matrix used for the uplink data transmission.

[0103] Optionally, the DCI sent by the network device and received by the terminal device may include the target PMI information.

[0104] Optionally, the correspondence between the number of antenna ports, PMI information, and precoding matrix may be pre-agreed.

[0105] Optionally, the number of antenna ports of the target SRS resource subset is equal to the number of antenna ports included in the panel that transmits the SRS.

[0106] Therefore, based on this method, a precoding matrix used for uplink data transmission scheduled by DCI is obtained, so that data transmission on different panels can use independent precoding matrices, thereby increasing the flexibility of uplink scheduling.

[0107] Optionally, as an embodiment, the terminal device may determine the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of transmission layers for the uplink data transmission. For example, if the target SRS resource subset is a target SRS resource combination, and the target SRS resource combination includes K SRS resources, then the number of transmission layers for the uplink data transmission is K. For another example, if the target SRS resource subset is a target SRS resource, the terminal device determines the number of antenna ports of the target SRS resource as the number of transmission layers for the uplink data transmission.

[0108] Optionally, as an embodiment, the terminal device may determine the precoding matrix used for transmitting the SRS in the target SRS resource subset as the precoding matrix used for the first uplink data transmission.

[0109] Specifically, if the target SRS resource subset is a target SRS resource combination, the target SRS resource combination includes K SRS resources, and K is equal to the number of data transmission layers corresponding to the uplink data transmission; the terminal device determines K precoding matrices used by the K SRS resources; the K precoding matrices are respectively determined as K precoding matrices of the data transmission layers, and the K precoding matrices correspond one-to-one to the K data transmission layers, that is, one precoding matrix corresponds to one data transmission layer.

[0110] Therefore, uplink transmission corresponding to different SRS resources can use the same precoding matrix as that on the SRS resource, so as to match the channel information of the panel transmitting the corresponding data.

[0111] Optionally, as an embodiment, the terminal device determines the total number of antenna ports of the target SRS resource subset and / or the number of the at least one SRS resource as the number of antenna ports used for the uplink data transmission.

[0112] For example, if the target SRS resource subset is one target SRS resource, the terminal device may use the number of antenna ports of the target SRS resource as the number of antenna ports used for uplink data transmission.

[0113] For another example, if the target SRS resource subset is a target SRS combination, and the target SRS combination includes multiple SRS resources, each of which is a single-port SRS resource, the terminal device can determine the number of the multiple SRS resources as the number of antenna ports used for uplink data transmission.

[0114] Optionally, for codebook-based transmission, the terminal device can also determine the corresponding codebook based on the number of antenna ports used for the uplink data transmission; for non-codebook-based transmission, the terminal device can determine the number of transmission layers of the corresponding uplink data according to the number of antenna ports.

[0115] Therefore, the method is used to obtain the number of antenna ports for uplink data transmission, so that data transmission on different panels can use independent numbers of antenna ports, thereby improving the flexibility of uplink multi-panel scheduling.

[0116] Optionally, as an embodiment, the terminal device may determine the beam for receiving or sending the SRS in the target SRS resource subset as the beam used for the first uplink data transmission.

[0117] For example, the terminal device determines the beam used when sending the SRS on the SRS resource as the transmission beam for the first uplink data transmission.

[0118] For another example, the target SRS resource subset is a target SRS combination, which includes K SRS resources, and K is equal to the number of data transmission layers corresponding to the uplink data transmission; the terminal device determines K transmission beams to be used when sending SRS resources among the K SRS resources, and uses the K transmission beams as K transmission beams of the data transmission layer, and the K transmission beams correspond one-to-one to the K data transmission layers.

[0119] Therefore, uplink transmissions corresponding to different reference signal resources may use different beams to match the channel information of the panel transmitting the corresponding data.

[0120] Optionally, as an embodiment, the terminal device may determine the power control parameter corresponding to the target SRS resource subset as the transmit power used for the uplink data transmission according to the correspondence between the SRS resource subset and the power control parameter, wherein the target SRS resource subset is an SRS combination or an SRS resource.

[0121] Alternatively, the terminal device may also determine the power control parameter corresponding to the target SRI as the transmission power used for the uplink data transmission according to the corresponding relationship between the SRI and the power control parameter.

[0122] It should be understood that the correspondence between the SRS resource subset and the power control parameter, and / or the correspondence between the SRI and the power control parameter, can be pre-configured by the network device for the terminal device, and the embodiments of the present application are not limited to this.

[0123] It should be understood that the above power control parameter may include: at least one of an open-loop power control parameter, a closed-loop power control parameter and a path loss estimation value.

[0124] Therefore, uplink transmissions corresponding to different reference signal resources may use different transmit powers, so as to match the channel gain of the beam or panel transmitting the corresponding data.

[0125] Optionally, as an embodiment, the terminal device may determine a panel for receiving or sending an SRS in the target SRS resource subset as a panel used for the uplink data transmission.

[0126] For example, the target SRS resource subset is an SRS resource combination, and the terminal device determines the panel used when sending the SRS on the SRS resource combination as the panel for transmitting the uplink data.

[0127] Therefore, different panels may be used for uplink transmission corresponding to different reference signal resources, so that data can be transmitted on a better panel according to the reference signal, or multiple panels of the terminal can be fully utilized to transmit data simultaneously, thereby improving uplink transmission performance.

[0128] In an embodiment of the present application, the target SRS resource subset may be an SRS resource combination or an SRS resource, and the SRS resource combination or the SRS resource is an SRS resource for a network device to obtain the CSI for uplink data transmission. The uplink CSI may be a rank indication (RI), a PMI or a channel quality indicator (CQI), etc., and is used to obtain the modulation coding scheme MCS and frequency domain resource scheduling of the uplink transmission.

[0129] Therefore, in the method for uplink data transmission in an embodiment of the present application, a terminal device receives subset constraint indication information sent by a network device for indicating an available SRS resource subset, determines the length of a target SRI in a DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines a target SRS resource subset corresponding to the target SRI in at least one available SRS resource subset, and determines a corresponding transmission parameter for uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0130] Combined with the above Figure 1 , describes in detail the method for uplink data transmission according to an embodiment of the present application from the perspective of a terminal device, and will now be combined with Figure 2 , describes the method for uplink data transmission according to an embodiment of the present application from the perspective of a network device.

[0131] Figure 2 FIG. 2 shows a schematic flow chart of a method 200 for uplink data transmission according to an embodiment of the present application. The method 200 may be executed by a network device. Figure 2As shown, the method 200 includes: S210, sending subset constraint indication information of a sounding reference signal SRS resource to a terminal device, the subset constraint indication information is used to indicate at least one available SRS resource subset; S220, determining the length of the SRI contained in the DCI for scheduling uplink data transmission according to the subset constraint indication information; S230, determining a target SRS resource subset in the at least one available SRS resource subset, the target SRS resource subset is used by the terminal device to determine the transmission parameters used for the uplink data transmission; S240, sending the DCI including the target SRI to the terminal device according to the length of the SRI, the target SRI is used to indicate the target SRS resource subset.

[0132] Therefore, in the method for uplink data transmission in an embodiment of the present application, a network device sends subset constraint indication information for indicating an available SRS resource subset to a terminal device, and determines a target SRS resource based on the subset constraint indication information and the available SRS resource subset, and determines a target SRI in a DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device determines the corresponding transmission parameters of the uplink data transmission based on the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0133] Optionally, each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

[0134] Optionally, the method further includes: sending resource set indication information to the terminal device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0135] Optionally, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0136] Optionally, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0137] Optionally, the method further includes: determining at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0138] Optionally, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0139] Optionally, the at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

[0140] Optionally, determining the length of the SRI contained in the DCI for scheduling uplink data transmission according to the subset constraint indication information includes: determining the length of the SRI according to the number of the at least one available SRS resource subset.

[0141] Optionally, determining the length of the SRI according to the number of the at least one available SRS resource subset includes: determining that the length of the SRI is equal to in, It represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0142] Optionally, the method also includes: determining the correspondence between the SRI value and the at least one available SRS resource subset based on the subset constraint indication information; and determining the target SRI corresponding to the target SRS resource subset based on the correspondence between the SRI value and the at least one available SRS resource subset.

[0143] Optionally, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and at least one of an antenna array block.

[0144] It should be understood that the network device in method 200 in the embodiment of the present application may correspond to the network device in method 100, and the terminal device in method 200 may correspond to the terminal device in method 100, which will not be repeated here.

[0145] Therefore, in the method for uplink data transmission in an embodiment of the present application, a network device sends subset constraint indication information indicating an available SRS resource subset to a terminal device, and determines a target SRS resource based on the subset constraint indication information and the available SRS resource subset, and determines a target SRI in a DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device determines the corresponding transmission parameters of the uplink data transmission based on the target SRS resource subset. In this way, the SRI indication content can be limited according to the currently available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0146] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0147] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0148] Combined with the above Figure 1 to Figure 2 , describes in detail the method for uplink data transmission according to an embodiment of the present application, and will now be combined with Figures 3 to 6 , describing the terminal device and network device according to the embodiments of the present application.

[0149] like Figure 3 As shown, the terminal device 300 according to the embodiment of the present application includes: a receiving unit 310 and a determining unit 320. Specifically, the receiving unit 310 is used to: receive subset constraint indication information of a sounding reference signal SRS resource sent by a network device, and the subset constraint indication information is used to indicate at least one available SRS resource subset; the determining unit 320 is used to determine the length of SRI in the downlink control information DCI sent by the network device for scheduling uplink data transmission according to the subset constraint indication information; the determining unit 320 is also used to: determine the target SRI from the DCI according to the length of the SRI; the determining unit 320 is also used to: determine the target SRS resource subset corresponding to the target SRI in the at least one available SRS resource subset; the determining unit 320 is also used to: determine the transmission parameters used for the uplink data transmission according to the target SRS resource subset.

[0150] Therefore, the terminal device of the embodiment of the present application receives subset constraint indication information sent by the network device for indicating the available SRS resource subset, determines the length of the target SRI in the DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines the corresponding target SRS resource subset of the target SRI in at least one available SRS resource subset, and determines the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0151] Optionally, each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

[0152] Optionally, the receiving unit 310 is further used to: receive resource set indication information sent by the network device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0153] Optionally, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0154] Optionally, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0155] Optionally, the determining unit 320 is further used to: determine at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0156] Optionally, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0157] Optionally, the at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

[0158] Optionally, the determining unit 320 is specifically configured to: determine the length of the SRI according to the number of the at least one available SRS resource subset.

[0159] Optionally, the determining unit 320 is specifically configured to: determine that the length of the SRI is equal to in, It represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0160] Optionally, the determination unit 320 is specifically used to: determine the correspondence between the SRI value and the at least one available SRS resource subset according to the subset constraint indication information; and determine the target SRS resource subset corresponding to the target SRI from the at least one available SRS resource subset according to the correspondence between the SRI value and the at least one available SRS resource subset.

[0161] Optionally, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and at least one of an antenna array block.

[0162] Optionally, the determination unit 320 is specifically used to: determine the number of antenna ports of the target SRS resource subset and the target precoding matrix indication PMI information; based on the correspondence between the number of antenna ports, PMI information and the precoding matrix, determine the precoding matrix corresponding to the number of antenna ports of the target SRS resource subset and the target PMI information as the precoding matrix used for the uplink data transmission.

[0163] Optionally, the DCI includes the target PMI information.

[0164] Optionally, the determining unit 320 is specifically configured to: determine the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of transmission layers for the uplink data transmission.

[0165] Optionally, the determining unit 320 is specifically configured to: determine a precoding matrix used for transmitting the SRS in the target SRS resource subset as a precoding matrix used for the uplink data transmission.

[0166] Optionally, the target SRS resource subset is a target SRS resource combination, and the number of SRS resources in the target SRS resource combination is K, where K is equal to the number of data transmission layers corresponding to the uplink data transmission; the determination unit 320 is specifically used to: determine the precoding matrix used by each SRS resource in the target SRS resource combination to obtain K precoding matrices; determine the K precoding matrices as K precoding matrices of the data transmission layers, and the K precoding matrices correspond one-to-one to the K data transmission layers.

[0167] Optionally, the determining unit 320 is specifically configured to determine the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of antenna ports used for the uplink data transmission.

[0168] Optionally, the determination unit 320 is specifically configured to determine a beam for sending an SRS in the target SRS resource subset as a beam used for uplink data transmission.

[0169] Optionally, the determining unit 320 is specifically configured to: determine the power control parameter corresponding to the target SRS resource subset as the power control parameter used for the uplink data transmission according to a correspondence between the SRS resource subset and the power control parameter.

[0170] Optionally, the determining unit 320 is specifically configured to: determine, according to a correspondence between the SRI and the power control parameter, the power control parameter corresponding to the target SRI as the power control parameter used for the uplink data transmission.

[0171] Optionally, the power control parameter includes at least one of an open-loop power control parameter, a closed-loop power control parameter and a path loss estimation value.

[0172] Optionally, the determining unit 320 is specifically configured to: determine the antenna array block that sends the SRS in the target SRS resource subset as the antenna array block used for the uplink data transmission.

[0173] It should be understood that the terminal device 300 according to the embodiment of the present application may correspond to the method 100 in the embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 300 are respectively to implement Figure 1 to Figure 2 For the sake of brevity, the corresponding processes of the terminal devices of each method are not repeated here.

[0174] Therefore, the terminal device of the embodiment of the present application receives subset constraint indication information sent by the network device for indicating the available SRS resource subset, determines the length of the target SRI in the DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines the corresponding target SRS resource subset of the target SRI in at least one available SRS resource subset, and determines the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0175] like Figure 4 As shown, the network device 400 according to the embodiment of the present application includes: a sending unit 410 and a determining unit 420. Specifically, the sending unit 410 is used to: send subset constraint indication information of a sounding reference signal SRS resource to a terminal device, the subset constraint indication information is used to indicate at least one available SRS resource subset; the determining unit 420 is used to: determine the length of the SRS resource indication SRI contained in the downlink control information DCI for scheduling uplink data transmission according to the subset constraint indication information; the determining unit 420 is also used to: determine a target SRS resource subset in the at least one available SRS resource subset, the target SRS resource subset is used by the terminal device to determine the transmission parameters used for the uplink data transmission; the sending unit 410 is also used to: send the DCI including the target SRI to the terminal device according to the length of the SRI, the target SRI is used to indicate the target SRS resource subset.

[0176] Therefore, the network device of the embodiment of the present application sends subset constraint indication information for indicating an available SRS resource subset to the terminal device, and determines the target SRS resource in the available SRS resource subset based on the subset constraint indication information, and determines the target SRS resource in the DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device can determine the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0177] Optionally, each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

[0178] Optionally, the sending unit 410 is further used to: send resource set indication information to the terminal device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0179] Optionally, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0180] Optionally, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0181] Optionally, the determining unit 420 is specifically used to: determine at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0182] Optionally, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0183] Optionally, the at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

[0184] Optionally, the determining unit 420 is specifically configured to: determine the length of the SRI according to the number of the at least one available SRS resource subset.

[0185] Optionally, the determining unit 420 is specifically configured to: determine that the length of the SRI is equal to in, It represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0186] Optionally, the determination unit is specifically used to: determine the correspondence between the SRI value and the at least one available SRS resource subset according to the subset constraint indication information; determine the target SRI corresponding to the target SRS resource subset according to the correspondence between the SRI value and the at least one available SRS resource subset.

[0187] Optionally, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and at least one of an antenna array block.

[0188] It should be understood that the network device 400 according to the embodiment of the present application may correspond to the method 200 in the embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 400 are respectively to implement Figure 1 to Figure 2 The corresponding processes of the network devices of each method in the present invention are not described here for the sake of brevity.

[0189] Therefore, the network device of the embodiment of the present application sends subset constraint indication information for indicating an available SRS resource subset to the terminal device, and determines the target SRS resource in the available SRS resource subset based on the subset constraint indication information, and determines the target SRS resource in the DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device can determine the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0190] Figure 5 A schematic block diagram of a terminal device 500 according to an embodiment of the present application is shown. Figure 5As shown, the terminal device 500 includes: a processor 510 and a transceiver 520, the processor 510 and the transceiver 520 are connected. Optionally, the terminal device 500 also includes a memory 530, and the memory 530 is connected to the processor 510. Among them, the processor 510, the memory 530 and the transceiver 520 communicate with each other through an internal connection path to transmit and / or control data signals. The memory 530 can be used to store instructions, and the processor 510 is used to execute the instructions stored in the memory 530 to control the transceiver 520 to send information or signals. The transceiver 520 is used to: receive subset constraint indication information of the detection reference signal SRS resource sent by the network device, and the subset constraint indication information is used to indicate at least one available SRS resource subset; the processor 510 is used to: determine the length of SRI in the downlink control information DCI sent by the network device for scheduling uplink data transmission according to the subset constraint indication information; determine the target SRI from the DCI according to the length of the SRI; determine the target SRS resource subset corresponding to the target SRI in the at least one available SRS resource subset; determine the transmission parameters used for the uplink data transmission according to the target SRS resource subset.

[0191] Therefore, the terminal device of the embodiment of the present application receives subset constraint indication information sent by the network device for indicating the available SRS resource subset, determines the length of the target SRI in the DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines the corresponding target SRS resource subset of the target SRI in at least one available SRS resource subset, and determines the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0192] Optionally, as an embodiment, each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

[0193] Optionally, as an embodiment, the transceiver 520 is used to: receive resource set indication information sent by the network device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0194] Optionally, as an embodiment, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0195] Optionally, as an embodiment, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0196] Optionally, as an embodiment, the processor 510 is used to: determine at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0197] Optionally, as an embodiment, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0198] Optionally, as an embodiment, the at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

[0199] Optionally, as an embodiment, the processor 510 is used to: determine the length of the SRI according to the number of the at least one available SRS resource subset.

[0200] Optionally, as an embodiment, the processor 510 is used to: determine that the length of the SRI is equal to in, It represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0201] Optionally, as an embodiment, the processor 510 is used to: determine the correspondence between the SRI value and the at least one available SRS resource subset based on the subset constraint indication information; and determine the target SRS resource subset corresponding to the target SRI from the at least one available SRS resource subset based on the correspondence between the SRI value and the at least one available SRS resource subset.

[0202] Optionally, as an embodiment, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and at least one of an antenna array block.

[0203] Optionally, as an embodiment, the processor 510 is used to: determine the number of antenna ports of the target SRS resource subset and the target precoding matrix indication PMI information; based on the correspondence between the number of antenna ports, PMI information and the precoding matrix, determine that the precoding matrix corresponding to the number of antenna ports of the target SRS resource subset and the target PMI information is the precoding matrix used for the uplink data transmission.

[0204] Optionally, as an embodiment, the DCI includes the target PMI information.

[0205] Optionally, as an embodiment, the processor 510 is used to: determine the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of transmission layers for the uplink data transmission.

[0206] Optionally, as an embodiment, the processor 510 is configured to: determine a precoding matrix used for transmitting the SRS in the target SRS resource subset as a precoding matrix used for the uplink data transmission.

[0207] Optionally, as an embodiment, the target SRS resource subset is a target SRS resource combination, the number of SRS resources in the target SRS resource combination is K, and K is equal to the number of data transmission layers corresponding to the uplink data transmission; the processor 510 is used to: determine the precoding matrix used by each SRS resource in the target SRS resource combination to obtain K precoding matrices; determine the K precoding matrices as K precoding matrices of the data transmission layers, and the K precoding matrices correspond one-to-one to the K data transmission layers.

[0208] Optionally, as an embodiment, the processor 510 is used to: determine the total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset as the number of antenna ports used for the uplink data transmission.

[0209] Optionally, as an embodiment, the processor 510 is used to: determine the beam for sending the SRS in the target SRS resource subset as the beam used for the uplink data transmission.

[0210] Optionally, as an embodiment, the processor 510 is used to: determine the power control parameter corresponding to the target SRS resource subset as the power control parameter used for the uplink data transmission according to the corresponding relationship between the SRS resource subset and the power control parameter.

[0211] Optionally, as an embodiment, the processor 510 is used to: determine the power control parameter corresponding to the target SRI as the power control parameter used for the uplink data transmission according to the corresponding relationship between the SRI and the power control parameter.

[0212] Optionally, as an embodiment, the power control parameter includes at least one of an open-loop power control parameter, a closed-loop power control parameter and a path loss estimation value.

[0213] Optionally, as an embodiment, the processor 510 is used to: determine the antenna array block that sends the SRS in the target SRS resource subset as the antenna array block used for the uplink data transmission.

[0214] It should be understood that the terminal device 500 according to the embodiment of the present application may correspond to the terminal device 300 in the embodiment of the present application, and may correspond to the corresponding subject in the method 100 according to the embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 500 are respectively to achieve Figure 1 to Figure 2 For the sake of brevity, the corresponding processes of the terminal device in each method are not repeated here.

[0215] Therefore, the terminal device of the embodiment of the present application receives the subset constraint indication information sent by the network device for indicating the available SRS resource subset, determines the length of the target SRI in the DCI for scheduling uplink data transmission according to the subset constraint indication information, and then determines the corresponding target SRS resource subset of the target SRI in at least one available SRS resource subset, and determines the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0216] Figure 6 A schematic block diagram of a network device 600 according to an embodiment of the present application is shown. Figure 6 As shown, the network device 600 includes: a processor 610 and a transceiver 620 , the processor 610 and the transceiver 620 are connected. Optionally, the network device 600 also includes a memory 630 , and the memory 630 is connected to the processor 610 . Among them, the processor 610, the memory 630 and the transceiver 620 communicate with each other through an internal connection path to transmit and / or control data signals. The memory 630 can be used to store instructions, and the processor 610 is used to execute the instructions stored in the memory 630 to control the transceiver 620 to send information or signals. The transceiver 620 is used to: send subset constraint indication information of the detection reference signal SRS resource to the terminal device, and the subset constraint indication information is used to indicate at least one available SRS resource subset; the processor 610 is used to: determine the length of the SRS resource indication SRI included in the downlink control information DCI for scheduling uplink data transmission according to the subset constraint indication information; determine the target SRS resource subset in the at least one available SRS resource subset, and the target SRS resource subset is used by the terminal device to determine the transmission parameters used for the uplink data transmission; according to the length of the SRI, send the DCI including the target SRI to the terminal device, and the target SRI is used to indicate the target SRS resource subset.

[0217] Therefore, the network device of the embodiment of the present application sends subset constraint indication information for indicating an available SRS resource subset to the terminal device, and determines the target SRS resource in the available SRS resource subset based on the subset constraint indication information, and determines the target SRS resource in the DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device can determine the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0218] Optionally, as an embodiment, each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

[0219] Optionally, as an embodiment, the transceiver 620 is used to: send resource set indication information to the terminal device, the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

[0220] Optionally, as an embodiment, the at least one SRS resource set includes N SRS resources, and the subset constraint indication information includes a resource indication bitmap corresponding one-to-one to the N SRS resources, and the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

[0221] Optionally, as an embodiment, each SRS resource subset of the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

[0222] Optionally, as an embodiment, the processor 610 is used to: determine at least one preconfigured SRS resource combination, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

[0223] Optionally, as an embodiment, the subset constraint indication information includes a resource combination indication bitmap corresponding one-to-one to the at least one SRS resource combination, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

[0224] Optionally, as an embodiment, the at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

[0225] Optionally, as an embodiment, the processor 610 is used to: determine the length of the SRI according to the number of the at least one available SRS resource subset.

[0226] Optionally, as an embodiment, the processor 610 is configured to: determine that the length of the SRI is equal to in, It represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

[0227] Optionally, as an embodiment, the processor 610 is used to: determine the correspondence between the SRI value and the at least one available SRS resource subset based on the subset constraint indication information; determine the target SRI corresponding to the target SRS resource subset based on the correspondence between the SRI value and the at least one available SRS resource subset.

[0228] Optionally, as an embodiment, the transmission parameters used for the uplink data transmission include: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and at least one of an antenna array block.

[0229] It should be understood that the network device 600 according to the embodiment of the present application may correspond to the network device 400 in the embodiment of the present application, and may correspond to the corresponding subject in the method 200 according to the embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 600 are respectively to achieve Figure 1 to Figure 2 For the sake of brevity, the corresponding processes of the network devices in each method are not repeated here.

[0230] Therefore, the network device of the embodiment of the present application sends subset constraint indication information for indicating an available SRS resource subset to the terminal device, and determines the target SRS resource in the available SRS resource subset based on the subset constraint indication information, and determines the target SRS resource in the DCI sent to the terminal device for scheduling uplink data transmission, so that the terminal device can determine the corresponding transmission parameters of the uplink data transmission according to the target SRS resource subset. In this way, the SRI indication content can be limited according to the current available SRS resource subset, and some SRI indication content that will not be adopted can be removed, thereby reducing the SRI overhead in the DCI.

[0231] It should be noted that the above method embodiments of the present application can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may be 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 devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0232] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0233] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0234] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0235] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0236] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0237] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0238] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0239] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for uplink data transmission, characterized in that: include: Receiving subset constraint indication information of a sounding reference signal SRS resource sent by a network device, and determining at least one available SRS resource subset according to the subset constraint indication information; Determine, according to the subset constraint indication information, the length of the SRS resource indication SRI in the downlink control information DCI sent by the network device for scheduling uplink data transmission; Determining a target SRI from the DCI according to the length of the SRI; Determining, from the at least one available SRS resource subset, a target SRS resource subset corresponding to the target SRI; For non-codebook based transmission, when each SRS resource in the target SRS resource subset is a single-port SRS resource, determining the number of transmission layers of the corresponding uplink data according to the number of antenna ports; determining, according to the target SRS resource subset, a transmission parameter used for the uplink data transmission; and The uplink data is transmitted according to the transmission parameters and the number of transmission layers.

2. The method according to claim 1, characterized in that Each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

3. The method according to claim 2, characterized in that The method further comprises: Receive resource set indication information sent by the network device, where the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

4. The method according to claim 3, characterized in that The at least one SRS resource set includes N SRS resources, the subset constraint indication information includes a resource indication bitmap corresponding to the N SRS resources one by one, the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

5. The method according to claim 1, characterized in that Each SRS resource subset in the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

6. The method according to claim 5, characterized in that The method further comprises: At least one preconfigured SRS resource combination is determined, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

7. The method according to claim 6, characterized in that The subset constraint indication information includes a resource combination indication bitmap corresponding to the at least one SRS resource combination in a one-to-one manner, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

8. The method according to any one of claims 5 to 7, characterized in that The at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

9. The method according to any one of claims 1 to 7, characterized in that The determining, according to the subset constraint indication information, the length of the SRI includes: The length of the SRI is determined according to the number of the at least one available SRS resource subset.

10. The method according to claim 9, characterized in that The determining, according to the number of the at least one available SRS resource subset, the length of the SRI comprises: Determine the length of the SRI equal to in, represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

11. The method according to any one of claims 1 to 7 and 10, characterized in that The method further comprises: Determining, according to the subset constraint indication information, a correspondence between a value of the SRI and the at least one available SRS resource subset; Determining, from the at least one available SRS resource subset, a target SRS resource subset corresponding to the target SRI, comprising: According to the correspondence between the value of the SRI and the at least one available SRS resource subset, a target SRS resource subset corresponding to the target SRI is determined from the at least one available SRS resource subset.

12. The method according to claim 1, characterized in that The transmission parameters used for the uplink data transmission include: at least one of: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and an antenna array block.

13. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: Determine the number of antenna ports of the target SRS resource subset and target precoding matrix indication PMI information; According to the correspondence between the number of antenna ports, PMI information and the precoding matrix, a precoding matrix corresponding to the number of antenna ports of the target SRS resource subset and the target PMI information is determined as the precoding matrix used for the uplink data transmission.

14. The method according to claim 13, characterized in that The DCI includes the target PMI information.

15. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: The total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset is determined as the number of transmission layers for the uplink data transmission.

16. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: The precoding matrix used for transmitting the SRS in the target SRS resource subset is determined as the precoding matrix used for uplink data transmission.

17. The method according to claim 16, characterized in that The target SRS resource subset is a target SRS resource combination, the number of SRS resources in the target SRS resource combination is K, and K is equal to the number of data transmission layers corresponding to the uplink data transmission; The step of determining the precoding matrix used for transmitting the SRS in the target SRS resource subset as the precoding matrix used for uplink data transmission includes: Determine a precoding matrix used by each SRS resource in the target SRS resource combination to obtain K precoding matrices; The K precoding matrices are determined as precoding matrices of the K data transmission layers, and the K precoding matrices correspond to the K data transmission layers in a one-to-one manner.

18. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: The total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset is determined as the number of antenna ports used for uplink data transmission.

19. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: The beam for sending the SRS in the target SRS resource subset is determined as the beam used for the uplink data transmission.

20. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: According to the corresponding relationship between the SRS resource subset and the power control parameter, the power control parameter corresponding to the target SRS resource subset is determined as the power control parameter used for the uplink data transmission.

21. The method according to claim 12, characterized in that The method further comprises: According to the corresponding relationship between the SRI and the power control parameter, the power control parameter corresponding to the target SRI is determined as the power control parameter used for the uplink data transmission.

22. The method according to claim 20 or 21, characterized in that The power control parameter includes at least one of an open-loop power control parameter, a closed-loop power control parameter and a path loss estimation value.

23. The method according to claim 12, characterized in that The determining, according to the target SRS resource subset, a transmission parameter used for uplink data transmission includes: The antenna array block for sending the SRS in the target SRS resource subset is determined as the antenna array block used for the uplink data transmission.

24. A method for uplink data transmission, characterized in that: include: Sending a subset constraint indication information of a sounding reference signal SRS resource to a terminal device, where the subset constraint indication information is used to indicate at least one available SRS resource subset; Determining, according to the subset constraint indication information, a length of an SRS resource indication SRI included in downlink control information DCI for scheduling uplink data transmission; Determine a target SRS resource subset in the at least one available SRS resource subset, wherein the target SRS resource subset is used by the terminal device to determine a transmission parameter used for uplink data transmission; Sending the DCI including a target SRI to the terminal device according to the length of the SRI, where the target SRI is used to indicate the target SRS resource subset; Receive uplink data for non-codebook transmission sent by the terminal device; wherein the uplink data is transmitted through the transmission parameters and the number of transmission layers, and when each SRS resource in the target SRS resource subset is a single-port SRS resource, the number of transmission layers of the corresponding uplink data is determined according to the number of antenna ports.

25. The method according to claim 24, characterized in that Each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

26. The method according to claim 25, characterized in that The method further comprises: Resource set indication information is sent to the terminal device, where the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

27. The method according to claim 26, characterized in that The at least one SRS resource set includes N SRS resources, the subset constraint indication information includes a resource indication bitmap corresponding to the N SRS resources one by one, the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

28. The method according to claim 24, characterized in that Each SRS resource subset in the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

29. The method according to claim 28, characterized in that The method further comprises: At least one preconfigured SRS resource combination is determined, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

30. The method according to claim 29, characterized in that The subset constraint indication information includes a resource combination indication bitmap corresponding to the at least one SRS resource combination in a one-to-one manner, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

31. The method according to any one of claims 28 to 30, characterized in that The at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

32. The method according to any one of claims 24 to 30, characterized in that The determining, according to the subset restriction indication information, the length of the SRI contained in the downlink control information DCI for scheduling uplink data transmission includes: The length of the SRI is determined according to the number of the at least one available SRS resource subset.

33. The method according to claim 32, characterized in that The determining, according to the number of the at least one available SRS resource subset, the length of the SRI comprises: Determine the length of the SRI equal to in, represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

34. The method according to any one of claims 24 to 30 and 33, characterized in that The method further comprises: Determining, according to the subset constraint indication information, a correspondence between a value of the SRI and the at least one available SRS resource subset; The target SRI corresponding to the target SRS resource subset is determined according to the correspondence between the value of the SRI and the at least one available SRS resource subset.

35. The method according to any one of claims 24 to 30 and 33, characterized in that The transmission parameters used for the uplink data transmission include: at least one of: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and an antenna array block.

36. A terminal device, characterized in that: include: A receiving unit, configured to receive subset constraint indication information of a sounding reference signal SRS resource sent by a network device, and determine at least one available SRS resource subset according to the subset constraint indication information; as well as A determining unit, configured to determine, according to the subset constraint indication information, a length of an SRS resource indication SRI in downlink control information DCI sent by a network device for scheduling uplink data transmission; The determining unit is further configured to: determine a target SRI from the DCI according to the length of the SRI; The determining unit is further configured to: determine, from the at least one available SRS resource subset, a target SRS resource subset corresponding to the target SRI; The determining unit is further configured to: For non-codebook based transmission, when each SRS resource in the target SRS resource subset is a single-port SRS resource, determining the number of transmission layers of the corresponding uplink data according to the number of antenna ports; determining, according to the target SRS resource subset, a transmission parameter used for the uplink data transmission; and The uplink data is transmitted according to the transmission parameters and the number of transmission layers.

37. The terminal device according to claim 36, characterized in that: Each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

38. The terminal device according to claim 37, characterized in that: The receiving unit is also used for: Receive resource set indication information sent by the network device, where the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

39. The terminal device according to claim 38, characterized in that: The at least one SRS resource set includes N SRS resources, the subset constraint indication information includes a resource indication bitmap corresponding to the N SRS resources one by one, the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

40. The terminal device according to claim 36, characterized in that: Each SRS resource subset in the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

41. The terminal device according to claim 40, characterized in that: The determining unit is further configured to: At least one preconfigured SRS resource combination is determined, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

42. The terminal device according to claim 41, characterized in that: The subset constraint indication information includes a resource combination indication bitmap corresponding to the at least one SRS resource combination in a one-to-one manner, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

43. The terminal device according to any one of claims 40 to 42, characterized in that: The at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

44. The terminal device according to any one of claims 36 to 42, characterized in that: The determining unit is specifically used for: The length of the SRI is determined according to the number of the at least one available SRS resource subset.

45. The terminal device according to claim 44, characterized in that: The determining unit is specifically used for: Determine the length of the SRI equal to in, represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

46. ​​The terminal device according to any one of claims 36 to 42 and 45, characterized in that: The determining unit is specifically used for: Determining, according to the subset constraint indication information, a correspondence between a value of the SRI and the at least one available SRS resource subset; According to the correspondence between the value of the SRI and the at least one available SRS resource subset, a target SRS resource subset corresponding to the target SRI is determined from the at least one available SRS resource subset.

47. The terminal device according to claim 36, characterized in that: The transmission parameters used for the uplink data transmission include: at least one of: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and an antenna array block.

48. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: Determine the number of antenna ports of the target SRS resource subset and target precoding matrix indication PMI information; According to the correspondence between the number of antenna ports, PMI information and the precoding matrix, a precoding matrix corresponding to the number of antenna ports of the target SRS resource subset and the target PMI information is determined as the precoding matrix used for the uplink data transmission.

49. The terminal device according to claim 48, characterized in that: The DCI includes the target PMI information.

50. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: The total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset is determined as the number of transmission layers for the uplink data transmission.

51. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: The precoding matrix used for transmitting the SRS in the target SRS resource subset is determined as the precoding matrix used for uplink data transmission.

52. The terminal device according to claim 51, characterized in that: The target SRS resource subset is a target SRS resource combination, the number of SRS resources in the target SRS resource combination is K, and K is equal to the number of data transmission layers corresponding to the uplink data transmission; The determining unit is specifically used for: Determine a precoding matrix used by each SRS resource in the target SRS resource combination to obtain K precoding matrices; The K precoding matrices are determined as precoding matrices of the K data transmission layers, and the K precoding matrices correspond to the K data transmission layers in a one-to-one manner.

53. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: The total number of antenna ports of the target SRS resource subset and / or the number of SRS resources included in the target SRS resource subset is determined as the number of antenna ports used for uplink data transmission.

54. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: The beam for sending the SRS in the target SRS resource subset is determined as the beam used for the uplink data transmission.

55. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: According to the corresponding relationship between the SRS resource subset and the power control parameter, the power control parameter corresponding to the target SRS resource subset is determined as the power control parameter used for the uplink data transmission.

56. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: According to the corresponding relationship between the SRI and the power control parameter, the power control parameter corresponding to the target SRI is determined as the power control parameter used for the uplink data transmission.

57. The terminal device according to claim 55 or 56, characterized in that: The power control parameter includes at least one of an open-loop power control parameter, a closed-loop power control parameter and a path loss estimation value.

58. The terminal device according to claim 47, characterized in that: The determining unit is specifically used for: The antenna array block for sending the SRS in the target SRS resource subset is determined as the antenna array block used for the uplink data transmission.

59. A network device, characterized in that: include: A sending unit, configured to send subset constraint indication information of a sounding reference signal SRS resource to a terminal device, wherein the subset constraint indication information is used to indicate at least one available SRS resource subset; A determining unit, configured to determine, according to the subset constraint indication information, a length of an SRS resource indication SRI included in downlink control information DCI for scheduling uplink data transmission; The determining unit is further used to: determine a target SRS resource subset in the at least one available SRS resource subset, wherein the target SRS resource subset is used by the terminal device to determine the transmission parameters used for the uplink data transmission; The sending unit is further used to: send the DCI including the target SRI to the terminal device according to the length of the SRI, where the target SRI is used to indicate the target SRS resource subset; and A receiving unit, used for receiving uplink data for non-codebook transmission sent by the terminal device; wherein the uplink data is transmitted through the transmission parameters and the number of transmission layers, and when each SRS resource in the target SRS resource subset is a single-port SRS resource, the number of transmission layers of the corresponding uplink data is determined according to the number of antenna ports.

60. The network device according to claim 59, characterized in that Each SRS resource subset in the at least one available SRS resource subset is an SRS resource.

61. The network device according to claim 60, characterized in that The sending unit is also used for: Resource set indication information is sent to the terminal device, where the resource set indication information is used to indicate at least one SRS resource set, and the subset constraint indication information is used to indicate at least one available SRS resource in the at least one SRS resource set.

62. The network device according to claim 61, characterized in that The at least one SRS resource set includes N SRS resources, the subset constraint indication information includes a resource indication bitmap corresponding to the N SRS resources one by one, the resource indication bitmap is used to indicate the at least one available SRS resource among the N SRS resources, and N is a positive integer.

63. The network device according to claim 59, characterized in that: Each SRS resource subset in the at least one available SRS resource subset is an SRS resource combination, and the one SRS resource combination includes at least one SRS resource.

64. The network device according to claim 63, characterized in that: The determining unit is specifically used for: At least one preconfigured SRS resource combination is determined, and the subset constraint indication information is used to indicate at least one available SRS resource combination in the at least one SRS resource combination.

65. The network device according to claim 64, characterized in that The subset constraint indication information includes a resource combination indication bitmap corresponding to the at least one SRS resource combination in a one-to-one manner, and the resource combination indication bitmap is used to indicate the at least one available SRS resource combination in the at least one SRS resource combination.

66. The network device according to any one of claims 63 to 65, characterized in that: The at least one SRS resource combination includes all combinations of SRS resources in an SRS resource set.

67. The network device according to any one of claims 59 to 65, characterized in that: The determining unit is specifically used for: The length of the SRI is determined according to the number of the at least one available SRS resource subset.

68. The network device according to claim 67, characterized in that The determining unit is specifically used for: Determine the length of the SRI equal to in, represents rounding up, and K is equal to the number of the at least one available SRS resource subset.

69. The network device according to any one of claims 59 to 65 and 68, characterized in that: The determining unit is specifically used for: Determining, according to the subset constraint indication information, a correspondence between a value of the SRI and the at least one available SRS resource subset; The target SRI corresponding to the target SRS resource subset is determined according to the correspondence between the value of the SRI and the at least one available SRS resource subset.

70. The network device according to any one of claims 59 to 65 and 68, characterized in that: The transmission parameters used for the uplink data transmission include: at least one of: a precoding matrix, a number of transmission layers, a number of antenna ports, a transmit beam, a power control parameter, and an antenna array block.

71. A terminal device, characterized in that: include: A processor and a memory, wherein the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory, the execution causes the processor to execute the method according to any one of claims 1 to 23.

72. A network device, characterized in that: include: A processor and a memory, wherein the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory, the execution causes the processor to execute the method according to any one of claims 24-35.

73. A computer storage medium, characterized in that The computer storage medium is used to store a computer program, which includes instructions for executing the method according to any one of claims 1-23.

74. A computer storage medium, characterized in that The computer storage medium is used to store a computer program, which includes instructions for executing the method according to any one of claims 24-35.

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