CN119997223A

CN119997223A - Uplink data transmission method and device

Info

Publication number: CN119997223A
Application number: CN202311515225.6A
Authority: CN
Inventors: 杨洪建; 龚名新; 余健
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2025-05-13
Also published as: WO2025103328A1

Abstract

The present application provides an uplink data transmission method and device, the method comprising: a network device sends first information and second information to a terminal device, wherein the first information is used to indicate K first frequency domain resources, the first frequency domain resources are allocated to the terminal device, and the second information is used to indicate the TPMI of N precoding subbands, K and N are positive integers; the N precoding subbands include K first frequency domain resources, and the number of second frequency domain resources between any two adjacent first frequency domain resources in the first precoding subband is less than X, X is a positive integer; the second frequency domain resources are not allocated to the terminal device, and the first precoding subband is any one of the N precoding subbands; the network device receives uplink data on the K first frequency domain resources, and the uplink data is precoded based on the TPMI of the N precoding subbands. The above method can reduce the overhead of indicating the TPMI corresponding to the precoding subband and improve the precoding performance.

Description

Uplink data transmission method and device

Technical Field

The present application relates to the field of communications, and in particular, to an uplink data transmission method and apparatus.

Background

When a New Radio (NR) system performs Downlink (DL) transmission, the precoding granularity of the MIMO (multiple input multiple output, MIMO), that is, the precoding resource group (precoding resource group, PRG) may be 2 Resource Blocks (RBs), 4 RBs, or a wideband. If the precoding granularity is broadband, the base station applies the same precoding matrix to the scheduling bandwidth during downlink transmission, and if the precoding granularity is 2 RBs or 4 RBs, the base station divides the scheduling bandwidth into different sub-bands according to the precoding granularity during downlink transmission, applies the same precoding matrix to the same sub-band, and applies different precoding matrices to the different sub-bands. A User Equipment (UE) transmits a precoding matrix indicator (precoding matrix indicator, PMI) to a base station according to a precoding granularity.

The base station informs the UE of a transmit precoding matrix indicator (TRANSMITTED PRECODING MATRIX INDICATOR, TPMI) when an Uplink (UL) transmission is made by the NR system. Currently, only a scheme for dividing continuous frequency domain resources and notifying TPMI exists, and how to reasonably divide discontinuous frequency domain resources and notify TPMI needs to be further discussed.

Disclosure of Invention

The embodiment of the application provides an uplink data transmission method and device, which are used for reasonably dividing discontinuous frequency domain resources and notifying TPMI.

In a first aspect, the present application provides an uplink data transmission method, which may be performed by a network device or a module (e.g. a chip) in the network device. The method comprises the steps that network equipment sends first information and second information to terminal equipment, wherein the first information is used for indicating K first frequency domain resources, the first frequency domain resources are distributed to the terminal equipment, the second information is used for determining TPMI of N precoding sub-bands, K and N are positive integers, the N precoding sub-bands comprise the K first frequency domain resources, the number of second frequency domain resources at intervals of any two adjacent first frequency domain resources in the first precoding sub-bands is smaller than X, X is a positive integer, the second frequency domain resources are not distributed to the terminal equipment, the first precoding sub-bands are any one of the N precoding sub-bands, and the network equipment receives uplink data on the K first frequency domain resources and is based on TPMI precoding of the N precoding sub-bands.

By adopting the method, because the N pre-coding sub-bands comprise K first frequency domain resources, the N pre-coding sub-bands can be determined not according to all the frequency domain resources in one bandwidth, and only the N pre-coding sub-bands are required to comprise the K first frequency domain resources, so that the cost for indicating the TPMI corresponding to the pre-coding sub-bands can be reduced, and redundant TPMI related information is avoided being carried. And the number of second frequency domain resources spaced by any two adjacent first frequency domain resources in the first pre-coding sub-band is smaller than X, so that one pre-coding sub-band comprises as few second frequency domain resources as possible, so that a plurality of frequency domain resources which are not allocated to terminal equipment do not exist in one pre-coding sub-band, and the pre-coding performance can be improved.

The second information is used to indicate TPMI of N pre-encoded subbands, and may be described as determining TPMI of N pre-encoded subbands or obtaining TPMI of N pre-encoded subbands. Or may be described as that the second information is used to indicate TPMI of N pre-encoded subbands and the number of layers used by the terminal device. Wherein, TPMI may also be replaced by TPMI index.

In one possible design, the frequency domain resources respectively included by the N precoding subbands do not overlap with each other.

In one possible design, the frequency domain resource with the smallest index and/or the frequency domain resource with the largest index in the first pre-coding sub-band is the first frequency domain resource.

In one possible design, among the N pre-coding subbands, there is a second pre-coding subband and a third pre-coding subband, a first index is greater than a second index, a difference between the first index and the second index is greater than Y, Y is a positive integer, where the first index is an index of a frequency domain resource with a minimum index in the second pre-coding subband, and the second index is an index of a frequency domain resource with a maximum index in the third pre-coding subband.

By adopting the design, a plurality of frequency domain resources which are not allocated to the terminal equipment do not exist in one pre-coding sub-band, the frequency difference between the frequency domain resources with smaller indexes and the frequency domain resources with larger indexes in the same pre-coding sub-band is not too large, and the same set of pre-coding matrix information can be shared.

In one possible design, the first information and/or the second information is carried by downlink control information DCI.

In one possible design, among the N pre-coding subbands, there is a fourth pre-coding subband and a fifth pre-coding subband, where a maximum index of frequency resources in the fourth pre-coding subband is smaller than a minimum index of frequency resources in the fifth pre-coding subband, and a number of frequency domain resources included in the fourth pre-coding subband is greater than or equal to a number of frequency domain resources included in the fifth pre-coding subband.

By adopting the design, the number of the frequency domain resources included in the N precoding sub-bands can be arranged according to the descending order.

In one possible design, there is a fourth and fifth pre-coding sub-band, the maximum index of frequency resources in the fourth pre-coding sub-band is less than the minimum index of frequency resources in the fifth pre-coding sub-band, and the difference between the maximum index of frequency resources in the fourth pre-coding sub-band and the minimum index is less than or equal to the difference between the maximum index of frequency resources in the fifth pre-coding sub-band and the maximum index of frequency resources in the fourth pre-coding sub-band.

In one possible design, among the N pre-coding subbands, there is a fourth pre-coding subband and a fifth pre-coding subband, where a maximum index of frequency resources in the fourth pre-coding subband is less than a minimum index of frequency resources in the fifth pre-coding subband, and the number of frequency domain resources included in the fourth pre-coding subband is less than or equal to the number of frequency domain resources included in the fifth pre-coding subband.

By adopting the design, the number of the frequency domain resources included in the N precoding sub-bands can be arranged according to the ascending order.

In one possible design, there is a fourth and fifth pre-coding sub-band, where the maximum index of the frequency resources in the fourth pre-coding sub-band is less than the maximum index of the frequency resources in the fifth pre-coding sub-band, and the difference between the maximum index and the minimum index of the frequency resources in the fifth pre-coding sub-band is less than or equal to the difference between the minimum index of the frequency resources in the fifth pre-coding sub-band and the minimum index of the frequency resources in the fourth pre-coding sub-band.

In one possible design, among the N precoding subbands, an absolute value of a difference value of the number of frequency domain resources included in any two precoding subbands is less than or equal to Z, where Z is a positive integer.

By adopting the design, the number of the second frequency domain resources included in one pre-coding sub-band can be reduced as much as possible.

In one possible design, the K first frequency domain resources belong to a plurality of frequency domain resource groups, the frequency domain resources included in the plurality of frequency domain resource groups do not overlap with each other, wherein each frequency domain resource group forms one or more precoding subbands, and the total number of the precoding subbands formed by the plurality of frequency domain resource groups is less than or equal to N.

In one possible design, the number of the precoding subbands formed by the ith frequency domain resource group is determined according to the number of the frequency domain resources included by the ith frequency domain resource group, and P is determined according to the value of K and the value of N, i is a positive integer, and the ith frequency domain resource group is any one of the frequency domain resource groups.

In one possible design, the number of frequency domain resources included in each precoding subband formed by the ith frequency domain resource group is determined according to the number of frequency domain resources included in the ith frequency domain resource group and the number of precoding subbands formed by the ith frequency domain resource group.

In one possible design of the device,Or alternativelyWherein C1 is an integer.

In one possible design, the presence of at least one of the N pre-coding subbands includes the second frequency domain resource.

In a second aspect, the present application provides an uplink data transmission method, which may be performed by a terminal device or a module (e.g. a chip) in the terminal device. The method comprises the steps that a terminal device receives first information and second information from a network device, wherein the first information is used for indicating K first frequency domain resources, the first frequency domain resources are distributed to the terminal device, the second information is used for indicating TPMI of N precoding sub-bands, K and N are positive integers, the N precoding sub-bands comprise the K first frequency domain resources, the number of second frequency domain resources at intervals of any two adjacent first frequency domain resources in the first precoding sub-bands is smaller than X, X is a positive integer, the second frequency domain resources are not distributed to the terminal device, the first precoding sub-bands are any one of the N precoding sub-bands, and the terminal device sends uplink data on the K first frequency domain resources and is based on TPMI precoding of the N precoding sub-bands.

In one possible design of the device,Or alternativelyWherein C1 is an integer.

In one possible design, the terminal device determines the N precoding subbands according to the K first frequency-domain resources before the terminal device transmits uplink data on the K first frequency-domain resources.

In a third aspect, the present application provides an uplink data transmission method, which may be performed by a network device or a module (e.g. a chip) in the network device. The method comprises the steps that network equipment sends third information and fourth information to terminal equipment, wherein the third information is used for indicating frequency domain resources corresponding to M carriers respectively, the fourth information is used for determining TPMI of N precoding sub-bands, N and M are positive integers, the N precoding sub-bands comprise the frequency domain resources corresponding to the M carriers respectively, the network equipment receives uplink data on the frequency domain resources corresponding to the M carriers respectively, and the uplink data is precoded based on the TPMI of the N precoding sub-bands.

By adopting the method, the N pre-coding sub-bands comprise the frequency domain resources corresponding to the M carriers respectively, so that the cost for indicating the TPMI corresponding to the pre-coding sub-bands can be reduced, the carrier with redundant TPMI related information is avoided, and the pre-coding performance can be improved.

Illustratively, the fourth information is used to indicate TPMI of the N pre-encoded subbands, and may also be described as that the fourth information is used to determine TPMI of the N pre-encoded subbands, or that the fourth information is used to obtain TPMI of the N pre-encoded subbands. Or may be described as that the fourth information is used to determine TPMI of N pre-encoded subbands and the number of layers of the terminal device. Wherein, TPMI may also be replaced by TPMI index.

In one possible design, the third information and/or the fourth information is carried by downlink control information DCI.

In one possible design, the frequency domain resource corresponding to each of the M carriers constitutes one or more precoding subbands, and a sum of numbers of the precoding subbands constituted by the frequency domain resource corresponding to each of the M carriers is less than or equal to N.

In one possible design, the number of the precoding subbands formed by the frequency domain resources corresponding to the jth carrier is determined according to the total number of the frequency domain resources corresponding to the jth carrier, and Q, where j is a positive integer, j is greater than or equal to 1 and less than or equal to M, and the jth carrier is any one of the M carriers, and Q is determined according to the total number of the frequency domain resources corresponding to the M carriers and the value of N.

In one possible design, the number of frequency domain resources included in each precoding subband formed by the frequency domain resource corresponding to the jth carrier is determined according to the total number of frequency domain resources corresponding to the jth carrier and the number of precoding subbands formed by the frequency domain resource corresponding to the jth carrier.

In one possible design of the device,Or alternativelyWherein C2 is an integer, and W _j is the total number of frequency domain resources corresponding to the jth carrier.

In a fourth aspect, the present application provides an uplink data transmission method, which may be performed by a terminal device or a module (e.g. a chip) in the terminal device. The method comprises the steps that a terminal device receives third information and fourth information from network devices, wherein the third information is used for indicating frequency domain resources corresponding to M carriers respectively, the fourth information is used for determining TPMI of N precoding sub-bands, N and M are positive integers, the N precoding sub-bands comprise the frequency domain resources corresponding to the M carriers respectively, the terminal device determines the N precoding sub-bands according to the frequency domain resources corresponding to the M carriers respectively, and the terminal device sends uplink data on the frequency domain resources corresponding to the M carriers respectively, and the uplink data is precoded based on the TPMI of the N precoding sub-bands.

In a fifth aspect, the present application provides a communication device, which may be a first device, or may be a module or unit (for example, a chip, or a chip system, or a circuit) in the first device, which performs the method/operation/step/action described in any one of the first to fourth aspects, or may be used in combination with the first device.

In a sixth aspect, the present application provides a communication device comprising at least one processing element and at least one memory element, wherein the at least one memory element is adapted to store programs and data, and the at least one processing element is adapted to read and execute the programs and data stored by the memory element, such that the method according to any one of the above aspects of the present application is implemented.

In a seventh aspect, the application also provides a computer program which, when run on a computer, causes the computer to perform the method of any one of the above aspects.

In an eighth aspect, the present application provides a communications device comprising interface circuitry and at least one processor, the interface circuitry to provide input and/or output of a program or instruction to the at least one processor, the at least one processor to execute the program or instruction to enable the communications device to implement the method of any one of the preceding aspects.

In one possible way, the communication device comprises the at least one memory for storing the program or instructions.

In a ninth aspect, the present application provides a computer storage medium having stored therein a software program which, when read and executed by one or more processors, performs the method of any one of the above aspects.

In a tenth aspect, the application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the preceding aspects.

In an eleventh aspect, the present application provides a chip system comprising at least one chip and a memory, the at least one chip being configured to read and execute a program stored in the memory, to implement the method of any one of the above aspects.

In a twelfth aspect, the present application provides a communication system comprising a terminal device performing the method of any of the first or third aspects above and a network device performing the method of any of the second or fourth aspects above.

Further combinations of the present application may be made to provide further implementations based on the implementations provided in the above aspects.

Drawings

In order to more clearly describe the embodiments of the present application or the technical solutions in the background art, the following description will describe the drawings that are required to be used in the embodiments of the present application or the background art.

Fig. 1 is a schematic architecture diagram of a communication system to which an embodiment of the present application is applied;

FIG. 2 is a schematic diagram of RBG allocation according to the present application;

FIG. 3 is a schematic diagram of a possible pre-coding subband determination method 1 according to the present application;

FIG. 4 is a schematic diagram of a possible pre-coding subband determination method 2 of the present application;

FIG. 5 is a flow chart of an overview of an uplink data transmission method according to the present application;

Fig. 6A is a schematic diagram of a first frequency domain resource allocated to a terminal device by a network device according to the present application;

FIG. 6B is a schematic representation of 3 pre-encoded subbands determined based on FIG. 6A in accordance with the present application;

FIG. 6C is a schematic representation of 4 pre-coding subbands determined based on FIG. 6A in accordance with the present application;

Fig. 7A is another schematic diagram of a first frequency domain resource allocated to a terminal device by a network device according to the present application;

FIG. 7B is one of the schematic diagrams of the pre-coding sub-bands determined based on FIG. 7A in the present application;

FIG. 7C is a second schematic representation of the pre-coding sub-band determined based on FIG. 7A in accordance with the present application;

FIG. 7D is a third schematic representation of the pre-coding sub-band determined based on FIG. 7A in accordance with the present application;

FIG. 8A is a schematic diagram of a fourth of the pre-coding sub-bands determined based on FIG. 7A in the present application;

FIG. 8B is a fifth schematic representation of the pre-coding sub-band determined based on FIG. 7A in accordance with the present application;

FIG. 8C is a schematic diagram of a pre-coding subband determined based on FIG. 7A in accordance with the present application;

FIG. 9 is a flow chart of a method of determining N pre-coding subbands in accordance with the present application;

fig. 10 is a schematic diagram of determining a frequency domain resource group according to a first frequency domain resource in the present application;

FIG. 11 is a flow chart illustrating an overview of another uplink data transmission method according to the present application;

FIG. 12 is a flow chart of another method of determining N pre-coding subbands in accordance with the present application;

FIG. 13 is a schematic diagram of a communication device according to the present application;

Fig. 14 is a schematic structural diagram of another communication device in the present application.

Detailed Description

Specific embodiments of the present application will be described below by way of example with reference to the accompanying drawings in the form a part of the specification. Implementations of the application may also include combinations of these embodiments, such as with other embodiments and with structural changes made without departing from the spirit or scope of the application. The following detailed description of the embodiments is, therefore, not to be taken in a limiting sense. The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application.

Embodiments of the present application may be applied to various communication systems such as a global system for mobile communications (global system for mobile communications, GSM) system, a code division multiple access (code division multiple access, CDMA) system, a wideband code division multiple access (wideband code division multiple access, WCDMA) system, a general packet radio service (GENERAL PACKET radio service, GPRS), a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD), a general mobile communication system (universal mobile telecommunication system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, WIMAX) communication system, a fifth generation (5th generation,5G) system, or a New Radio (NR), or to future communication systems or other similar communication systems, etc.

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which an embodiment of the application applies. As shown in fig. 1, the communication system comprises a radio access network 100 and a core network 200, and optionally the communication system 1000 may further comprise the internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in fig. 1) and may also include at least one terminal device (e.g., 120a-120j in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminal device and the radio access network device may be connected to each other by a wired or wireless method. Fig. 1 is only a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1.

The radio access network device may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a fifth generation (5th generation,5G) mobile communication system, a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, or may be a module or unit that performs a function of a base station part, for example, may be a Central Unit (CU), or may be a Distributed Unit (DU). The CU here performs the functions of the radio resource control protocol and the packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) of the base station, and may also perform the functions of the service data adaptation protocol (SERVICE DATA adaptation protocol, SDAP), the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of part of the physical layer or all of the physical layer, and for a detailed description of the above-mentioned protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The radio access network device may be a macro base station (e.g. 110a in fig. 1), a micro base station or an indoor station (e.g. 110b in fig. 1), a relay node or a donor node, etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the wireless access network equipment. For convenience of description, a network device is described below as an example of a radio access network device.

The terminal device may also be referred to as a terminal, user Equipment (UE), mobile station, mobile terminal, etc. The terminal device may be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal equipment can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

The network device and the terminal device may be fixed in location or may be mobile. The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted, on water surface, on aircraft, balloon and satellite. The embodiment of the application does not limit the application scenes of the network equipment and the terminal equipment.

The roles of network devices and terminal devices may be relative, for example, helicopter or drone 120i in fig. 1 may be configured as a mobile network device, with drone 120i being the network device for those terminal devices 120j that access radio access network 100 through 120i, but 120i being the terminal device for network device 110a, i.e., communication between 110a and 120i being via a wireless air interface protocol. Of course, communication between 110a and 120i may also be performed via an interface protocol between network devices, in which case 120i is also a network device with respect to 110 a. Thus, both the network device and the terminal device may be collectively referred to as a communication apparatus, 110a and 110b in fig. 1 may be referred to as a communication apparatus having a network device function, and 120a-120j in fig. 1 may be referred to as a communication apparatus having a terminal device function.

Communication between the network device and the terminal device, between the network device and the network device, and between the terminal device and the terminal device can be performed through an authorized spectrum, communication can be performed through an unlicensed spectrum, communication can be performed through both the authorized spectrum and the unlicensed spectrum, communication can be performed through a spectrum below 6 gigahertz (GHz), communication can be performed through a spectrum above 6GHz, and communication can be performed through a spectrum below 6GHz and a spectrum above 6 GHz. The embodiment of the application does not limit the spectrum resources used by the wireless communication.

In the embodiment of the present application, the functions of the network device may be performed by modules (such as chips) in the network device, or may be performed by a control subsystem including the functions of the network device. The control subsystem including the network device function may be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal device may be performed by a module (e.g., a chip or a modem) in the terminal device, or may be performed by an apparatus including the functions of the terminal device.

It should be understood that in the embodiment of the present application, a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH), a physical downlink control channel (physical downlink control channel, PDCCH), a physical uplink control channel (physical uplink control channel, PUCCH) and a Physical Uplink Shared Channel (PUSCH) are merely used as examples of a downlink data channel, a downlink control channel, an uplink control channel and an uplink data channel, respectively, and the data channel and the control channel may have different names in different systems and different scenarios, and the embodiment of the present application is not limited thereto.

The frequency domain resource allocation of PUSCH in a 5G NR wireless communication system has 3 types including an uplink resource allocation type (uplink resource allocation type) 0, an uplink resource allocation type 1, and an uplink resource allocation type 2. Wherein, the uplink resource allocation type 0 can be used for the allocation of discontinuous resources. The uplink resource allocation type 1 may be used for allocation of contiguous resources, the uplink resource allocation type 2 may be used for dynamic switching of non-contiguous or contiguous resource allocation (DYNAMIC SWITCH).

If the resource configuration (resourceAllocation) field in the radio resource control (radio resource control, RRC) signaling indicates uplink resource allocation type 0, a specific frequency domain resource allocation may be indicated using a bitmap of the frequency range resource allocation (frequency domain resource assignment) field in the downlink control information (downlink control information, DCI).

If the resource configuration (resourceAllocation) field in the radio resource control (radio resource control, RRC) signaling indicates uplink resource allocation type 2 and the most significant bit (most significant bit, MSB) bit value of the frequency range resource allocation field in DCI formats (formats) 0_1 and 0_2 is 0, this indicates that uplink resource allocation type 0 is used. The specific frequency domain resource allocation may be indicated using a bitmap of a frequency range resource allocation field in the DCI. Further, if the MSB bit value is 1, it means that the uplink resource allocation type 1 is used.

For example, assume that the frequency domain resource granularity allocated to a UE by a network device is a resource block group (resource block group, RBG), which is a set of consecutive virtual resource blocks (virtual resource block, VRB). The bitmap is "10011110", and the corresponding RBG allocation situation is shown in fig. 2, where the diagonal boxes indicate RBGs allocated to the UE, and the blank boxes indicate RBGs not allocated to the UE. Wherein, RBG 0, RBG 3, RBG 4, RBG 5, RBG 6 are RBGs allocated to UE, and RBG 0 is discontinuous with other RBGs. RBG X represents an RBG indexed by X, where X is an integer greater than or equal to 0.

Currently, there are two possible pre-coding subband determination methods:

The method 1 includes determining a precoding sub-band according to the number of all physical resource blocks (physical resource block, PRBs) included in one bandwidth, and indicating a TPMI corresponding to the precoding sub-band formed by all PRBs to the UE through DCI. If the number of all PRBs included in one bandwidth is fixed, the PRG granularity (i.e., the number of RBGs included in each PRG) is also fixed, then the number of bits used to indicate TPMI in the DCI is fixed, so that the complexity of the UE in blind detection of the DCI can be lower.

For example, as shown in fig. 3, one bandwidth includes 8 PRBs, each of which includes 4 PRBs, and 2 PRGs may be determined. Therefore, DCI is used to indicate TPMI to which 2 PRGs respectively correspond. Whether or not 8 PRBs are all allocated to the UE, DCI needs to indicate TPMI to which 2 PRGs respectively correspond.

As shown in fig. 3, black is a PRB allocated to a UE by a network device, and white is a PRB not allocated to the UE. It can be seen that the 3 PRBs allocated for use by the UE are all located in prg#1, i.e. prg#2 is not useful for the UE. However, the DCI still includes TPMI corresponding to each of the 2 PRGs, that is, TPMI corresponding to prg#2 is redundant information for the UE, resulting in a relatively large DCI overhead.

The method 2 comprises the steps of determining a pre-coding sub-band according to the number of the scheduled PRBs in one bandwidth, and indicating the TPMI corresponding to the pre-coding sub-band formed by the scheduled PRBs to the UE through DCI. The scheduled PRBs, i.e. the PRBs allocated to the UE by the network device. Although the number of PRBs to which the UE is scheduled may vary, if the number of PRGs to which the UE is configured is fixed (i.e., the PRG granularity is variable), the number of bits used to indicate TPMI in the DCI may also be fixed, which may enable the UE to have lower complexity in blind detection of the DCI.

As shown in fig. 4, 6 PRBs among 11 RBGs are scheduled for use by the UE, and 2 RBGs are discontinuous with the other 4 RBGs in the frequency domain. If the number of PRGs is 2, each PRG includes 3 RBGs, where 6/2=3. It can be seen that although the prg#1 includes only 3 scheduled RBGs, the first 2 RBGs are discontinuous from the last 1 RBG in the frequency domain and the frequency difference is very large, resulting in poor precoding performance of the prg#1.

In the present application, if the precoding granularity is not specifically defined as a subband, PRG is used by default to refer to the precoding subband.

Each of the precoding subbands includes a frequency domain resource that is any one of an RBG, a Resource Block (RB), or a physical resource block (physical resource block, PRB).

The frequency domain resources which can be included in each pre-coding sub-band are two types, namely a first frequency domain resource and a second frequency domain resource. Wherein the first frequency domain resource is allocated to the terminal device, i.e. the first frequency domain resource is a scheduled frequency domain resource. The second frequency domain resources are not allocated to the terminal device, i.e. the second frequency domain resources are unscheduled frequency domain resources. The second frequency domain resource may be a preset frequency domain resource, and the second frequency domain resource may be a frequency domain resource used for other signaling or transmission, for example, may be a frequency domain resource allocated for other terminal devices. One of the precoding subbands may include first frequency domain resources or first frequency domain resources and second frequency domain resources.

For example, as shown in fig. 2, a diagonal square represents a first frequency domain resource and a blank square represents a second frequency domain resource. Wherein RBG 0, RBG 3, RBG 4, RBG 5 and RBG 6 are all first frequency domain resources, and RBG 1, RBG 2 and RBG 7 are all second frequency domain resources.

Based on the network system architecture shown in fig. 1 and the description of the related art, several possible uplink data transmission methods are provided in the embodiments of the present application, and the execution subject of each uplink data transmission method is described by taking a network device and a terminal device as an example. For example, the network device may be the access network device 110a or the access network device 110b of fig. 1. The terminal may be any of the terminal devices 120 previously described with respect to fig. 1. Furthermore, it should be understood that the network device may also be replaced by a communication apparatus having a network device function or by a chip, a unit or a module inside the communication apparatus having a network device function. The terminal device may also be replaced by a communication device with terminal device functionality or by a chip, unit or module inside the communication device with terminal functionality.

As shown in fig. 5, the present application provides an uplink data transmission method, which includes:

Step 500, the network device sends the first information and the second information to the terminal device. Accordingly, the terminal device receives the first information and TPMI of the N pre-encoded subbands from the network device.

The first information is used for indicating K first frequency domain resources, the first frequency domain resources are distributed to the terminal equipment, and K is a positive integer. The K first frequency domain resources may be understood as that the network device schedules K frequency domain resources for the terminal device, or that the network device allocates K frequency domain resources for the terminal device. The K first frequency domain resources may be continuous frequency domain resources or discontinuous frequency domain resources, which is not limited in the present application.

For example, the allocation of the first frequency domain resource may be indicated by using a bitmap of a frequency range resource allocation field in the DCI, and reference may be made to fig. 2 and the above related matters, which are not repeated here.

The second information is used for indicating TPMI of N pre-coding sub-bands, where N is a positive integer. The TPMI of the N pre-coding subbands may be understood as TPMI corresponding to each of the N pre-coding subbands, that is, one TPMI corresponding to one pre-coding subband.

Illustratively, the DCI includes precoding information and a layer number (precoding information and number of layers) field. The precoding information and layer number field may include a certain number of bits, for example, 0 bits, or 1 bit, or 2 bits, or 3 bits, or 4 bits, or 5 bits, or 6 bits, or more than 6 bits. The present application is not limited to a specific number of bits. Wherein, if the upper layer is configured with "nonCodeBook" or the number of antenna ports (ports) is 1, the precoding information and the layer number field may be 0 bits, i.e. the network device is not required to inform the terminal device of the layer number and TPMI.

When the precoding information and the number of layers field include a number of bits other than 0, the precoding information and the number of layers field indicate N indexes in table 1, for example, the indexes may be bit fields (bits FIELD MAPPED to index) mapped to the indexes. The table 1 is a preset table, and table 1 provides the number of layers and TPMI used by the terminal device, and the corresponding relationship between the number of layers and TPMI and the index. Taking any one index of N indexes indicated by the precoding information and the layer number domain as an example, the terminal device may determine, according to the index and table 1, the layer number and TPMI used by the terminal device corresponding to the index. Furthermore, the terminal device determines which table 2 to select according to the number of layers obtained by the table 1, and different layers can correspond to different tables 2. The terminal device may search the selected table 2 for precoding matrix information corresponding to the TPMI, for example, a precoding matrix, according to the TPMI obtained in the table 1. Wherein, table 2 is also a preset table. Table 2 provides correspondence between TPMI and precoding matrix information. It should be noted that the present application is not limited to the specific implementation manner of table 1 and table 2. That is, the terminal device may determine TPMI of the N precoding subbands according to the second information, and further determine N precoding matrix information according to the TPMI of the N precoding subbands. Wherein, the N precoding matrix information corresponds to the TPMI of the N precoding sub-bands one by one. The table may be a set of correspondence relations, for example, table 1 may be a set of correspondence relations between layers and TPMI and index, and include correspondence relations between a plurality of TPMI and index, and table 2 may be precoding matrix information corresponding to the TPMI.

For example, as shown in table 1 below in table a, assuming the number of antenna ports is 2, different columns need to be found for differently configured terminal devices of codebook subset (codebookSubset). For example, the codebook subset is complete and partial and incoherent (fullyAndPartialAndNonCoherent), bit FIELD MAPPED to index is 8, and the terminal device lookup table a obtains "2layers: tpmi=2", i.e. the number of layers is 2, and the tpmi index is 2. Table A details can also be referred to as TR 38.212.

Table A

Further, the terminal may determine table 2 according to parameters such as the number of layers being 2 and the number of antenna ports being 2, and table 2 is shown in table B below. The terminal equipment determines that W corresponding to the TPMI index of 2 is the W according to the TPMI index of 2Namely precoding matrix information corresponding to the TPMI. Table B details can also be referred to as TR 38.211.

Table B

It is to be understood that the above tables A and B are only examples and are not limiting of the present application.

For example, the first information and/or the second information may be carried by DCI, which is carried on PDCCH.

In one possible implementation, the network device and the terminal device may also determine the number of pre-encoded subbands, i.e. determine the value of N, N being a positive integer greater than 1. In an example, the terminal device may directly or indirectly determine the value of N according to some 1 or more bits in the DCI. In another example, the terminal device may directly or indirectly determine the value of N from some 1 or more fields in the received higher layer signaling (e.g., RRC signaling).

Step 510, the terminal device sends uplink data on the K first frequency domain resources. Correspondingly, the network device receives uplink data on the K first frequency domain resources. Wherein the uplink data is based on TPMI precoding of N precoding subbands.

Illustratively, the uplink data is precoded based on TPMI of the N precoding subbands, that is, the uplink data is precoded according to the N precoding matrix information. Wherein, the N precoding matrix information corresponds to the TPMI of the N precoding sub-bands one by one.

Illustratively, the N pre-coding subbands include K first frequency domain resources, and the number of second frequency domain resources spaced by any two adjacent first frequency domain resources in the first pre-coding subbands is smaller than X, where X is a positive integer, and in one embodiment, the second frequency domain resources are frequency domain resources not allocated to the terminal device, and the first pre-coding subbands are any one of the N pre-coding subbands. The first pre-coding subband is described below as an example. For example, the value of X may be 1 or 2, which is not limited in the present application.

The number of second frequency domain resources spaced by any two adjacent first frequency domain resources in the first pre-coding sub-band is smaller than X, which can be understood that the absolute value of the difference between the indexes of any two adjacent first frequency domain resources in the first pre-coding sub-band is smaller than x+1. For convenience of explanation, hereinafter, the "first precoding subband is any one of N precoding subbands, and the number of second frequency domain resources of any two adjacent first frequency domain resource intervals in the first precoding subband is smaller than X" is denoted as characteristic 0.

Because the N pre-coding sub-bands include K first frequency domain resources, the N pre-coding sub-bands may not be determined according to all the frequency domain resources in one bandwidth, and only the N pre-coding sub-bands are required to include the K first frequency domain resources, which can reduce the overhead of TPMI corresponding to the pre-coding sub-bands and avoid carrying redundant TPMI related information. And the number of second frequency domain resources spaced by any two adjacent first frequency domain resources in the first pre-coding sub-band is smaller than X, so that one pre-coding sub-band comprises as few second frequency domain resources as possible, so that a plurality of frequency domain resources which are not allocated to terminal equipment do not exist in one pre-coding sub-band, and the pre-coding performance can be improved.

In addition, the N pre-coding subbands may have other possible features, and it is to be understood that the following features are merely examples and are not limiting of the present application.

The frequency domain resources respectively included by the N pre-coding sub-bands are not overlapped with each other

I.e. any two of the N pre-coding sub-bands comprise different indexes of the frequency domain resources. Or there are no overlapping frequency domain resources for the N pre-coding subbands.

As shown in fig. 6A, it is assumed that the granularity of the frequency domain resources allocated to the terminal device by the network device may be RBGs, and RBG indexes from 0 to 17, i.e., RBGs 0 to 17, among 18 consecutive RBGs, wherein a diagonal square indicates a first frequency domain resource and a blank square indicates a second frequency domain resource. RBG1 to RBG3, RBG7 to RBG10, and RBG11 and RBG12 are all the first frequency domain resources, i.e., k=9. Of the 18 consecutive RBGs, RBGs other than the above 9 RBGs are not allocated to the terminal apparatus, and these resources are second frequency domain resources.

Based on the frequency domain resource allocation shown in fig. 6A, if n=3, 3 pre-coding subbands (i.e., 3 PRGs) shown in fig. 6B are merely examples, and if n=4, 4 pre-coding subbands (i.e., 4 PRGs) shown in fig. 6C are merely examples, fig. 6A to 6C are not limiting of the present application.

For example, based on the frequency domain resource allocation situation shown in fig. 6A, it can be seen in conjunction with fig. 6B that, for any one of the 3 precoding subbands, for example, PRG1, the 3 first frequency domain resources included in PRG1 are consecutive frequency domain resources, that is, the number of second frequency domain resources of any two adjacent RBG intervals is 0, or the difference between indexes of any two adjacent first frequency domain resources is described as 1.PRG2 and PRG3 are similar.

In addition, PRG1 includes RBG1 to RBG3, PRG2 includes RBG7 to RBG10, and PRG3 includes RBG11 and RBG12, that is, there is no overlapping frequency domain resource of PRG1, PRG2, and PRG 3.

The characteristic 2 is that in N pre-coding sub-bands, a second pre-coding sub-band and a third pre-coding sub-band exist, the first index is larger than the second index, the difference value between the first index and the second index is larger than Y, Y is a positive integer, wherein the first index is the index of the frequency domain resource with the minimum index in the second pre-coding sub-band, and the second index is the index of the frequency domain resource with the maximum index in the third pre-coding sub-band.

That is, for two precoding subbands, the difference between the minimum index in the precoding subband including the frequency domain resource with the larger index and the maximum index in the precoding subband including the frequency domain resource with the smaller index is greater than Y, so that there are not many frequency domain resources which are not allocated to the terminal device in one precoding subband, the frequency difference between the frequency domain resource with the smaller index and the frequency domain resource with the larger index in the same precoding subband is not too large, and the same set of precoding matrix information can be shared.

Further, X may be less than or equal to Y. For example, Y may be a positive integer between 1 and 5, X is a positive integer between 1 and 5, and X is less than or equal to Y.

And 3, in the N pre-coding sub-bands, a fourth pre-coding sub-band and a fifth pre-coding sub-band exist, the maximum index of frequency resources in the fourth pre-coding sub-band is smaller than the minimum index of frequency resources in the fifth pre-coding sub-band, and the number of the frequency resources included in the fourth pre-coding sub-band is smaller than or equal to the number of the frequency resources included in the fifth pre-coding sub-band.

Or, it may be further described that, among the N pre-encoded subbands, there are a fourth pre-encoded subband and a fifth pre-encoded subband, a maximum index of frequency resources in the fourth pre-encoded subband is smaller than a minimum index of frequency resources in the fifth pre-encoded subband, and a difference between the maximum index and the minimum index of frequency resources included in the fourth pre-encoded subband is smaller than or equal to the number of frequency resources included in the fifth pre-encoded subband.

Therefore, the number of frequency domain resources included in the precoding sub-band including the frequency domain resources having the larger index may be made larger than or equal to the number of frequency domain resources included in the precoding sub-band including the frequency domain resources having the smaller index. Or it may be understood that, by the above feature 3, the number of frequency domain resources included in the N precoding subbands may be arranged in an ascending order.

As shown in fig. 7A, assuming that the granularity of the frequency domain resources allocated to the terminal device by the network device may be RBGs, RBG indexes from 0 to 17, i.e., RBGs 0 to 17, among 18 consecutive RBGs, wherein a diagonal square indicates a first frequency domain resource and a blank square indicates a second frequency domain resource. RBG0, RBG2, RBG4, RBG6, RBG8, RBG10, RBG12, RBG14, RBG16 are all first frequency domain resources, i.e., k=9. Of the 18 consecutive RBGs, RBGs other than the above 9 RBGs are not allocated to the terminal apparatus, and these resources are second frequency domain resources.

In the case of the frequency domain resource allocation shown in fig. 7A, if n=4, 4 precoding subbands (i.e., 4 PRGs) shown in fig. 7B to 7D are merely examples, and are not limiting of the present application.

For example, as can be seen from fig. 7B, the number of RBGs included in PRG1, the number of RBGs included in PRG2, the number of RBGs included in PRG3 are all the same, and the number of RBGs included in PRG4 is 5. That is, the number of RBGs included in the PRG having the larger index is greater than or equal to the number of RBGs included in the PRG having the smaller index. Taking PRG1 and PRG2 as examples, the maximum index of RBG in PRG1 is 2, and the minimum index of RBG in PRG2 is 4,2<4, then the number of RBGs included in PRG1 is equal to the number of RBGs included in PRG 2. For any two PRGs of PRG1, PRG2, PRG3 and PRG4 that satisfy the condition, that is, the maximum index of RBGs in the other PRG (denoted as first PRG) is smaller than the minimum index of RBGs in the other PRG (denoted as second PRG), the number of RBGs included in the first PRG is smaller than or equal to the number of RBGs included in the second PRG.

Fig. 7C and 7D are similar to fig. 7A, and the 4 PRGs indicated in fig. 7C and the 4 PRGs indicated in fig. 7D satisfy feature 3, and are not described here again.

And 4, in the N pre-coding sub-bands, the maximum index of the frequency resource in the fourth pre-coding sub-band is smaller than the maximum index of the frequency resource in the fifth pre-coding sub-band, and the difference value between the maximum index and the minimum index of the frequency resource in the fifth pre-coding sub-band is smaller than or equal to the difference value between the minimum index of the frequency resource in the fifth pre-coding sub-band and the minimum index of the frequency resource in the fourth pre-coding sub-band.

Thus, the number of frequency domain resources comprised by the different pre-coding sub-bands may be relatively averaged, or it may be appreciated that narrowing the difference in the number of frequency domain resources comprised by the different pre-coding sub-bands is achieved by feature 4.

For example, as shown in fig. 7B, taking PRG3 and PRG4 as an example, the maximum index of RBG in PRG3 is 10, the minimum index is 8, the maximum index of RBG in PRG4 is 16, and the minimum index is 12, where 10<12, the difference between the maximum index (16) and the minimum index (12) of RBG in PRG4 is 4, and the difference between the minimum index (12) of RBG in PRG4 and the minimum index (8) of RBG in PRG3 is 4.

As can be seen from fig. 7C, taking PRG3 and PRG4 as examples, the maximum index of RBG in PRG3 is 10, the minimum index is 6, the maximum index of RBG in PRG4 is 16, and the minimum index is 12, wherein 10<12, the difference between the maximum index (16) and the minimum index (12) of RBG in PRG4 is 4, and the difference between the minimum index (12) of RBG in PRG4 and the minimum index (6) of RBG in PRG3 is 6.

As can be seen from fig. 7D, taking PRG3 and PRG4 as examples, the maximum index of RBG in PRG3 is 8, the minimum index is 6, the maximum index of RBG in PRG4 is 16, and the minimum index is 10, wherein 8<10, the difference between the maximum index (16) and the minimum index (10) of RBG in PRG4 is 6, and the difference between the minimum index (10) of RBG in PRG4 and the minimum index (6) of RBG in PRG3 is 4.

That is, the 4 PRGs indicated in fig. 7A, and the 4 PRGs indicated in fig. 7B satisfy feature 4.

And 5, in the N pre-coding sub-bands, a fourth pre-coding sub-band and a fifth pre-coding sub-band exist, the maximum index of frequency resources in the fourth pre-coding sub-band is smaller than the minimum index of frequency resources in the fifth pre-coding sub-band, and the number of the frequency resources included in the fourth pre-coding sub-band is larger than or equal to that of the frequency resources included in the fifth pre-coding sub-band.

Or, it may be further described that, among the N pre-encoded subbands, there are a fourth pre-encoded subband and a fifth pre-encoded subband, a maximum index of frequency resources in the fourth pre-encoded subband is smaller than a minimum index of frequency resources in the fifth pre-encoded subband, and a difference between the maximum index and the minimum index of frequency resources included in the fourth pre-encoded subband is greater than or equal to the number of frequency resources included in the fifth pre-encoded subband.

Therefore, the number of frequency domain resources included in the precoding sub-band including the frequency domain resources with the larger index may be made smaller than or equal to the number of frequency domain resources included in the precoding sub-band including the frequency domain resources with the smaller index. Alternatively, it may be understood that the number of frequency domain resources included in the N precoding subbands may be arranged in a descending order according to the above feature 3.

Assume that the network device allocates frequency domain resources to the terminal device as shown in fig. 7A. In the case of the frequency domain resource allocation shown in fig. 7A, if n=4, the 4 precoding subbands (i.e., the 4 PRGs) shown in fig. 8A to 8C are only examples, and are not limiting of the present application.

For example, as can be seen from fig. 8A, the number of RBGs included in PRG2, the number of RBGs included in PRG3, the number of RBGs included in PRG4 are all the same, and the number of RBGs included in PRG1 is 5. That is, the number of RBGs included in the PRG having the smaller index is greater than or equal to the number of RBGs included in the PRG having the larger index. Taking PRG1 and PRG2 as examples, the maximum index of RBG in PRG1 is 4, and the minimum index of RBG in PRG2 is 6,4<6, then the number of RBGs included in PRG1 is greater than the number of RBGs included in PRG 2. For any two PRGs of PRG1, PRG2, PRG3 and PRG4 that satisfy the condition, that is, the maximum index of RBGs in the other PRG (denoted as first PRG) is smaller than the minimum index of RBGs in the other PRG (denoted as second PRG), the number of RBGs included in the first PRG is greater than or equal to the number of RBGs included in the second PRG.

Fig. 8B and 8C are similar to fig. 8A, and the 4 PRGs indicated in fig. 8B and the 4 PRGs indicated in fig. 8C satisfy feature 5, and are not described here again.

And 6, in the N pre-coding sub-bands, a fourth pre-coding sub-band and a fifth pre-coding sub-band exist, wherein the maximum index of the frequency resource in the fourth pre-coding sub-band is smaller than the minimum index of the frequency resource in the fifth pre-coding sub-band, and the difference value between the maximum index of the frequency resource in the fourth pre-coding sub-band and the minimum index is smaller than or equal to the difference value between the maximum index of the frequency resource in the fifth pre-coding sub-band and the maximum index of the frequency resource in the fourth pre-coding sub-band.

For example, as can be seen from fig. 8A, taking PRG1 and PRG2 as examples, the maximum index of RBG in PRG1 is 4, the minimum index is 0, the maximum index of RBG in PRG2 is 8, and the minimum index is 6, wherein 4<6 is the difference between the maximum index (4) and the minimum index (0) of RBG in PRG1 is 4, and the difference between the maximum index (8) of RBG in PRG2 and the maximum index (4) of RBG in PRG1 is 4.

As can be seen from fig. 8B, taking PRG2 and PRG3 as examples, the maximum index of RBG in PRG2 is 4, the minimum index is 0, the maximum index of RBG in PRG2 is 10, and the minimum index is 6, wherein 4<6 is used, the difference between the maximum index (4) and the minimum index (0) of RBG in PRG1 is 4, and the difference between the maximum index (10) of RBG in PRG2 and the maximum index (4) of RBG in PRG1 is 6.

As can be seen from fig. 8C, taking PRG1 and PRG2 as examples, the maximum index of RBG in PRG1 is 6, the minimum index is 0, the maximum index of RBG in PRG2 is 10, and the minimum index is 8, wherein 6<8 is used, the difference between the maximum index (6) and the minimum index (0) of RBG in PRG1 is 6, and the difference between the maximum index (10) of RBG in PRG2 and the maximum index (6) of RBG in PRG1 is 4.

That is, 4 PRGs indicated in fig. 8A, and 4 PRGs indicated in fig. 8B each satisfy feature 6.

And 7, the frequency domain resource with the minimum index and/or the frequency domain resource with the maximum index in the first pre-coding sub-band is the first frequency domain resource.

That is, the frequency domain resource with the smallest index and/or the frequency domain resource with the largest index in the first pre-coding sub-band is not the second frequency domain resource.

The above feature 7 can make the number of the second frequency domain resources included in one pre-coding sub-band as small as possible.

As in fig. 6B, 6C, 7B, and 7C, fig. 8A-8C satisfy feature 7.

And 8, in the N pre-coding sub-bands, the absolute value of the difference value of the number of frequency domain resources included in any two pre-coding sub-bands is smaller than or equal to Z, wherein Z is a positive integer.

Thus, the number of frequency domain resources comprised by the different pre-coding sub-bands may be relatively averaged, or it may be appreciated that narrowing the difference in the number of frequency domain resources comprised by the different pre-coding sub-bands is achieved by feature 8.

In addition, the N precoding subbands may include second frequency domain resources in addition to K first frequency domain resources. In one possible implementation, there may be at least one of the N pre-coding subbands that includes a second frequency domain resource. Wherein there is a pre-coding sub-band comprising second frequency domain resources, in which one or more second frequency domain resources are located between two first frequency domain resources, and both the two first frequency domain resources and the one or more second frequency domain resources belong to the pre-coding sub-band, the frequency domain resources comprised by the pre-coding sub-band are discontinuous. For example, as shown in fig. 7B, 7C, and 8A to 8C, there is a PRG including a second frequency domain resource and a first frequency domain resource.

Note that the N pre-coding subbands include only K first frequency domain resources and do not include second frequency domain resources, for example, as shown in fig. 6B and 6C. Each PRG includes only the first frequency domain resources.

Optionally, before the terminal device sends the uplink data on the K first frequency domain resources, the terminal device determines N precoding subbands. That is, the terminal device may first determine N precoding subbands according to the K first frequency domain resources. Specifically, reference may be made to the method for determining N pre-coding subbands shown in fig. 9 described below, and as shown in fig. 9, it is to be understood that the following method is merely exemplary and is not a limitation of the present application.

S901, determining that K first frequency domain resources belong to a plurality of frequency domain resource groups.

In one embodiment, the plurality of frequency domain resource groups include frequency domain resources that do not overlap with each other.

Illustratively, K first frequency domain resources may be grouped based on the same manner as feature 0 to feature 3, and a plurality of frequency domain resource groups may be determined, and thus may be made to satisfy the following condition:

And (1) for any frequency domain resource group, the number of second frequency domain resources of any two adjacent first frequency domain resource intervals in the frequency domain resource group is smaller than X. Condition (1) may correspond to the above feature 0.

And (2) the frequency domain resources included in the plurality of frequency domain resource groups are not overlapped with each other. Condition (2) may correspond to feature 1 described above.

In the plurality of frequency domain resource group packets, the condition (3) is that there are two frequency domain resource groups, wherein a minimum index of one frequency domain resource group is larger than a maximum index of the other frequency domain resource group, and a difference between the minimum index and the maximum index is larger than Y. Condition (3) may correspond to feature 2 described above.

For example, as shown in fig. 6A, k=9, RBGs 1 to 3, RBG7 to 10, and RBG11 and RBG12 are first frequency domain resources. The above conditions (1) to (3) may be combined, and 3 frequency domain resource groups may be determined according to 9 first frequency domain resources, as shown in fig. 10.

S902, determining the number of the precoding sub-bands formed by each frequency domain resource group in the plurality of frequency domain resource groups according to P.

The preset value of the number of the frequency domain resources included in each pre-coding sub-band is P, that is, the preset value of the granularity of the pre-coding sub-band is P. Wherein P is determined according to the value of K and the value of N. By way of example only, and in an illustrative,Or alternativelyWherein C1 is an integer. Wherein, Indicating that the K/N is rounded up,Representing rounding down K/N.

Taking the ith frequency domain resource group as an example, the ith frequency domain resource group is any one of a plurality of frequency domain resource groups, and i is a positive integer.

The number of the precoding sub-bands formed by the ith frequency domain resource group is determined according to the number of the frequency domain resources included by the ith frequency domain resource group and P.

For example, assume thatAs can be seen in conjunction with fig. 6A, k=9, assuming n=4

Number of precoding subbands formed by ith frequency domain resource groupS _i is the number of frequency domain resources included in the ith frequency domain resource group.

For example, as can be seen from fig. 10, the 9 first frequency domain resources belong to 3 frequency domain resource groups, where the number of frequency domain resources S ₁ included in the frequency domain resource group 1 is 3, the number of frequency domain resources S ₂ included in the frequency domain resource group 2 is 4, and the number of frequency domain resources S ₃ included in the frequency domain resource group 3 is 2.

Number of precoding subbands configured by frequency domain resource group 1

Number of precoding subbands formed by frequency domain resource group 2

Number of precoding subbands formed by frequency domain resource group 3

It can be seen that N ₁+N₂+N₃ =4, that is, the number of precoding subbands formed by each of the 3 frequency domain resource groups is equal to N, n=4.

S903, judging whether the first summation value is larger than N, if so, executing S904, otherwise, executing S905.

The first summation value is the sum of the numbers of the precoding sub-bands formed by each of the plurality of frequency domain resource groups. The sum of the number of precoding subbands formed by each of the plurality of frequency domain resource groups, i.e., the total number of precoding subbands formed by the plurality of frequency domain resource groups.

For example, assuming that the total number of the frequency domain resource groups determined by the K first frequency domain resources is L, the first summation value isIf it isExecution S905, ifS904 is performed.

As can be seen from the above examples, N ₁+N₂+N₃ =4, that is, the number of precoding subbands formed by each of the 3 frequency domain resource groups is equal to N, and the network device configures n=4 for the terminal device. And then S905 is performed.

In one embodiment, the embodiment of the present invention may be greater than or equal to one another, or satisfy a specific condition. The judgment condition in S903 may be, for example, to judge whether the first summation value is greater than or equal to N. Or may determine whether a predetermined condition is satisfied.

And S904, adjusting the value of P so that the redetermined first summation value is smaller than or equal to N.

That is, if the first summation value is greater than N, the value of P is adjusted such that the redefined first summation value is less than or equal to N.

Or may also be described as determining, from P, that the number of precoding subbands formed by each of the plurality of frequency-domain resource groups is associated with P' such that the first sum value is less than or equal to N when the first condition is satisfied. The first condition is that a sum of numbers of precoding subbands configured by each of a plurality of frequency domain resource groups determined according to P is greater than N.

Illustratively, the value of P is adjusted so that the adjusted P is greater than the P before adjustment, the number of the precoding subbands formed by each of the plurality of frequency domain resource groups is redetermined according to the adjusted P, and then the first summation value is redetermined, the above-mentioned determination in S903 is repeated, and if the first summation value is greater than N, the value of P is continuously increased, and the above-mentioned process is repeated until the first summation value is less than or equal to N. It will be appreciated that P, which ultimately results in a first summation value less than or equal to N, is denoted P'.

For example, assume thatSo that the first sum is greater than N, the value of P is adjusted, e.g. adjusted

And S905, determining the pre-coding sub-band granularity corresponding to each frequency domain resource.

Illustratively, the ith frequency domain resource group is any one of a plurality of frequency domain resource groups. The number of the frequency domain resources included in each precoding sub-band formed by the ith frequency domain resource group (namely, the granularity of the precoding sub-band corresponding to the ith frequency domain resource group) is determined according to the number of the frequency domain resources included by the ith frequency domain resource group and the number of the precoding sub-bands formed by the ith frequency domain resource group.

For example, the number of the cells to be processed,P _i is the precoding subband granularity corresponding to the ith frequency domain resource group.

In combination with the above-mentioned examples,Further, 4 pre-coding subbands as shown in fig. 6C can be obtained.

Through the above process, each frequency domain resource group can form one or more precoding sub-bands, the total number of the precoding sub-bands formed by the plurality of frequency domain resource groups is less than or equal to N, the granularity of the precoding sub-bands corresponding to each frequency domain resource group can be independently determined, the granularity of the precoding sub-bands corresponding to different frequency domain resource groups can be the same or different, and the granularity of the precoding sub-bands belonging to the same frequency domain resource group is the same.

As shown in fig. 11, the present application further provides an uplink data transmission method, which includes:

Step 1100, the network device sends third information and fourth information to the terminal device. Accordingly, the terminal device receives the third information and TPMI of the N pre-encoded subbands from the network device.

The third information is used for indicating frequency domain resources corresponding to the M carriers respectively, N and M are positive integers, and the N precoding sub-bands comprise the frequency domain resources corresponding to the M carriers respectively. Alternatively, N is an integer multiple of M, for example, when m=3, n=6.

Illustratively, the third information includes an index of the carrier, a carrier bandwidth, a value of M, and the like. Optionally, the subcarrier spacing (Subcarrier Spacing, SCS) of the M carriers is equal. The frequency domain resources corresponding to the M carriers are any one of RBG, RB or PRB.

The fourth information is used for indicating TPMI of N pre-coding sub-bands, where N is a positive integer. Reference may be made specifically to the above description about the second information, and no further description is given here.

For example, the third information and/or the fourth information is carried by downlink control information DCI, which is carried on the PDCCH. Or the third information may also be carried through RRC signaling or other higher layer signaling above the physical layer.

The frequency domain resources corresponding to each of the M carriers form one or more precoding subbands, and a sum of numbers of the precoding subbands formed by the frequency domain resources corresponding to each of the M carriers is less than or equal to N.

Wherein the granularity of the pre-coding sub-bands corresponding to different carriers may be the same or different, which is described in detail in the embodiment shown in fig. 12 below. If the granularity of the pre-coding sub-bands corresponding to different carriers is independently determined, the number of the frequency domain resources included in each pre-coding sub-band formed by the frequency domain resources corresponding to the jth carrier is determined according to the total number of the frequency domain resources corresponding to the jth carrier and the number of the pre-coding sub-bands formed by the frequency domain resources corresponding to the jth carrier.

Step 1110, the terminal device sends uplink data on the frequency domain resources corresponding to the M carriers respectively. Correspondingly, the network device receives uplink data on the frequency domain resources corresponding to the M carriers respectively.

Wherein the uplink data is based on TPMI precoding of N precoding subbands.

Optionally, before the terminal device sends uplink data on the frequency domain resources corresponding to the M carriers respectively, the terminal device determines N precoding subbands. That is, the terminal device may determine N precoding subbands according to the frequency domain resources corresponding to the M carriers, respectively. Reference is specifically made to the method shown in fig. 12 described below.

One possible method for the terminal device to determine the N pre-coding subbands is shown in fig. 12.

And S1201, determining the number of precoding sub-bands formed by each carrier in the M carriers according to Q.

The preset value of the number of the frequency domain resources included in each pre-coding sub-band is Q, namely the preset value of the granularity of the pre-coding sub-band is Q. Wherein, Q is determined according to the total number of frequency domain resources respectively included by M carriers and the value of N. By way of example only, and in an illustrative,Or alternativelyWherein C2 is an integer. W _j is the total number of frequency domain resources corresponding to the jth carrier, the jth carrier is any one of M carriers, j is more than or equal to 1 and less than or equal to M, and j is a positive integer.

Taking the frequency domain resource corresponding to the jth carrier as an example, the number of the precoding sub-bands formed by the frequency domain resource corresponding to the jth carrier is determined according to the total number of the frequency domain resources corresponding to the jth carrier and Q. Exemplary, the number of precoding subbands formed by the frequency domain resource corresponding to the jth carrier

For example, assume thatN=6, m=3, 3 carriers are component carriers CC (component carrier, CC)) 1, CC2, and CC3, respectively, wherein the total number of frequency domain resources W ₁ corresponding to CC1 is 7 RBs, or it is understood that CC1 schedules 7 RBs, the total number of frequency domain resources W ₂ corresponding to CC2 is 25 RBs, and the total number of frequency domain resources W ₃ corresponding to CC3 is 11 RBs, and thus 3 CCs co-scheduleRB, then

The number of precoding subbands formed by frequency domain resources corresponding to CC1

The number of precoding subbands formed by frequency domain resources corresponding to CC2

Number of precoding subbands formed by frequency domain resources corresponding to CC3

As can be seen, N ₁+N₂+N₃ =7, i.e. the sum of the number of precoding subbands made up of each of the 3 CCs is greater than N, n=6.

S1202, judging whether the first summation value is larger than N, if so, executing S1203, otherwise executing S1204a or S1204b.

The second summation value is the sum of the numbers of the precoding sub-bands formed by each carrier in the M carriers. The sum of the number of precoding subbands formed by each carrier in the M carriers, that is, the total number of precoding subbands formed by the frequency domain resources corresponding to the M carriers.

For example, the second summation value isIf it isExecuting S1204a or S1204b, ifS1203 is executed.

As can be seen from the above examples, N ₁+N₂+N₃ =7, that is, the sum of the numbers of the precoding subbands formed by each carrier in the 3 CCs is greater than N, and the network device configures n=6 for the terminal device. Further, S1203 is performed.

S1203. adjust the value of Q such that the redetermined second summation value is less than or equal to N.

That is, if the first summation value is greater than N, the value of Q is adjusted such that the redefined second summation value is less than or equal to N.

Or it may be further described that when the second condition is satisfied, determining that the number of precoding subbands made up of each of the M carriers is associated with Q' based on Q such that the second sum value is less than or equal to N. The second condition is that the sum of the numbers of the precoding subbands constituted by each of the M carriers determined according to Q is greater than N.

Illustratively, the value of Q is adjusted such that the adjusted Q is greater than the Q before adjustment, the number of precoding subbands formed by each of the M carriers is redetermined according to the adjusted Q, and then the second summation value is redetermined, the determination in S1202 is repeated, and if the second summation value is greater than N, the value of Q is continuously increased, and the above process is repeated until the second summation value is less than or equal to N. It will be appreciated that Q, which ultimately results in a second summation value less than or equal to N, is denoted Q'.

For example, assume thatSo that the second sum is greater than N, the value of Q is adjusted, e.g. adjusted

As can be seen from the above examples, the adjusted q=8+1=9, and the number of precoding subbands configured by each carrier in the 3 CCs is redetermined according to the adjusted Q:

As can be seen, N ₁+N₂+N₃ = 6, i.e. the sum of the number of pre-coding subbands made up of each of the 3 CCs is equal to N, N = 6. At this time, Q' =9.

And S1204a, if the granularity of the pre-coding sub-bands corresponding to each carrier is the same, determining N pre-coding sub-bands according to the total frequency domain resources corresponding to each carrier in the M carriers and Q'.

For example, let Q' =9, the number N ₁ =1 of precoding subbands configured by frequency domain resources corresponding to cc1, the number N ₂ =3 of precoding subbands configured by frequency domain resources corresponding to cc2, and the number N ₃ =2 of precoding subbands configured by frequency domain resources corresponding to cc 3.

And S1204b, if the granularity of the pre-coding sub-bands corresponding to each carrier can be different, determining N pre-coding sub-bands according to the total number of frequency domain resources corresponding to each carrier in the M carriers and the granularity of the pre-coding sub-bands corresponding to each carrier.

Taking the frequency domain resource corresponding to the jth carrier as an example, the number of the frequency domain resources included in each pre-coding sub-band formed by the frequency domain resource corresponding to the jth carrier is determined according to the total number of the frequency domain resources corresponding to the jth carrier and the number of the pre-coding sub-bands formed by the frequency domain resources corresponding to the jth carrier.

The number of the frequency domain resources included in each precoding sub-band formed by the frequency domain resources corresponding to the jth carrier, namely the granularity of the precoding sub-band corresponding to the jth carrier.

For example, the number of the cells to be processed,Q _j is the precoding subband granularity corresponding to the jth carrier.

In combination with the above-mentioned examples,

Through the above process, the granularity of the pre-coding sub-bands corresponding to the carrier wave can be made as small as possible. The granularity of the precoding sub-bands corresponding to different carriers can be the same or different, and the granularity of the precoding sub-bands formed by the frequency domain resources corresponding to the same carrier is the same.

In summary, the frequency domain resources corresponding to each carrier may form one or more precoding subbands, the total number of the precoding subbands formed by the frequency domain resources corresponding to the M carriers is less than or equal to N, and the granularity of the precoding subbands corresponding to each carrier may be separately determined or the same value.

It will be appreciated that, in order to implement the functions in the above embodiments, the terminal device and the network device include corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

Fig. 13 and 14 are schematic structural diagrams of possible communication devices according to an embodiment of the present application. These communication devices may be used to implement the functions of the terminal device or the network device in the above method embodiments, so that the beneficial effects of the above method embodiments may also be implemented.

As shown in fig. 13, the communication apparatus 1300 includes a processing unit 1310 and a transceiving unit 1320. The communication device 1000 is configured to implement the terminal device or the network device in the above-described method embodiment.

When the communications apparatus 1300 is configured to implement the functions of the network device in the method embodiment shown in fig. 5, as described above:

The processing unit 1310 invokes the transceiver unit 1320 to perform sending first information and second information to a terminal device, where the first information is used to indicate K first frequency domain resources, the first frequency domain resources are allocated to the terminal device, the second information is used to indicate TPMI of N precoding subbands, K and N are positive integers, the N precoding subbands include the K first frequency domain resources, the number of second frequency domain resources spaced between any two adjacent first frequency domain resources in the first precoding subbands is smaller than X, X is a positive integer, the second frequency domain resources are not allocated to the terminal device, the first precoding subbands are any one of the N precoding subbands, and uplink data is received on the K first frequency domain resources, and the uplink data is precoded based on the TPMI of the N precoding subbands.

In one possible design, the first information and/or the second information is carried by DCI.

In one possible design of the device,Or alternativelyWherein C1 is an integer.

The processing unit 1310 invokes the transceiver unit 1320 to execute receiving first information and second information from a network device, where the first information is used to indicate K first frequency domain resources, the first frequency domain resources are allocated to the terminal device, the second information is used to indicate TPMI of N precoding subbands, K and N are positive integers, the N precoding subbands include the K first frequency domain resources, the number of second frequency domain resources spaced between any two adjacent first frequency domain resources in the first precoding subbands is smaller than X, X is a positive integer, the second frequency domain resources are not allocated to the terminal device, the first precoding subbands are any one of the N precoding subbands, and uplink data is sent on the K first frequency domain resources, and the uplink data is precoded based on the TPMI of the N precoding subbands.

In one possible design of the device,Or alternativelyWherein C1 is an integer.

In one possible design, the processing unit 1310 may be configured to determine the N precoding subbands based on the K first frequency domain resources before transmitting uplink data on the K first frequency domain resources.

When the communications apparatus 1300 is configured to implement the functions of the network device in the method embodiment shown in fig. 11, the foregoing description is given:

The processing unit 1310 invokes the transceiver unit 1320 to perform sending third information and fourth information to the terminal device, where the third information is used to indicate frequency domain resources corresponding to M carriers, and the fourth information is used to indicate TPMI of N precoding subbands, where N and M are positive integers, the N precoding subbands include the frequency domain resources corresponding to the M carriers, and uplink data is received on the frequency domain resources corresponding to the M carriers, and the uplink data is precoded based on the TPMI of the N precoding subbands.

When the communication apparatus 1300 is used to implement the functions of the terminal device in the embodiment of the method shown in fig. 11, the above description is given below:

The processing unit 1310 invokes the transceiver unit 1320 to execute receiving third information and fourth information from the network device, where the third information is used to indicate frequency domain resources corresponding to M carriers respectively, the fourth information is used to indicate TPMI of N precoding subbands, where N and M are positive integers, the N precoding subbands include the frequency domain resources corresponding to M carriers respectively, the terminal device determines the N precoding subbands according to the frequency domain resources corresponding to M carriers respectively, and uplink data is sent on the frequency domain resources corresponding to M carriers respectively, where the uplink data is precoded based on the TPMI of the N precoding subbands.

In one possible design, the third information and/or the fourth information is carried by DCI.

The more detailed description of the processing unit 1310 and the transceiver unit 1320 may be directly obtained by referring to the related description in the above method embodiments, which is not repeated herein.

As shown in fig. 14, communication device 1400 includes a processor 1410 and an interface circuit 1420. The processor 1410 and the interface circuit 1420 are coupled to each other. It is to be appreciated that the interface circuit 1420 may be a transceiver or an input-output interface. Optionally, the communication device 1400 may also include a memory 1430 for storing instructions to be executed by the processor 1410 or for storing input data required by the processor 1410 to execute instructions or for storing data generated after the processor 1410 executes instructions.

When the communication device 1400 is used to implement the method shown in fig. 5 or 11, the processor 1410 is used to implement the functions of the processing unit 1314, and the interface circuit 1420 is used to implement the functions of the transceiver unit 1320.

It is to be appreciated that the Processor in embodiments of the application may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application Specific Integrated Circuits (ASICs), field programmable gate arrays (Field Programmable GATE ARRAY, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

In the present application, there is provided another example of an apparatus comprising at least one processor and at least one memory coupled to the at least one processor, the at least one memory for storing instructions that, when executed by the at least one processor, cause the communication apparatus to perform the method of the above-described embodiment. Taking the example of a communication device comprising a processor and a memory, as shown in fig. 14, communication device 1400 comprises a processor 1410 and a memory 1430. The processor 1410 is coupled to a memory 1430, the memory 1430 having instructions stored therein, which when executed by the processor 1410, the communication device 1400 performs the method performed by the terminal device or the network device in the above-described embodiment.

The method steps of the embodiments of the present application may be implemented in hardware or in software instructions executable by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. The storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in the terminal device or network device described above. The processor and the storage medium may reside as discrete components in a terminal device or network device.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium such as a floppy disk, a hard disk, a magnetic tape, an optical medium such as a digital video disk, or a semiconductor medium such as a solid state disk. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage medium.

In various embodiments of the application, where no special description or logic conflict exists, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments based on their inherent logic.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or" describes an association of associated objects, meaning that there may be three relationships, e.g., A and/or B, and that there may be A alone, while A and B are present, and B alone, where A, B may be singular or plural. In the text description of the application, the character "/", generally indicates that the front and rear associated objects are in an OR relationship, and in the formula of the application, the character "/" indicatesthat the front and rear associated objects are in a division relationship. "comprising at least one of A, B and C" may mean comprising A, B, C, A and B, A and C, B and C, A, B and C.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence number of each process does not mean the sequence of the execution sequence, and the execution sequence of each process should be determined according to the function and the internal logic.

Claims

1. An uplink data transmission method, characterized in that the method comprises:

The network equipment sends first information and second information to terminal equipment, wherein the first information is used for indicating K first frequency domain resources, the first frequency domain resources are allocated to the terminal equipment, the second information is used for indicating a transmission precoding matrix of N precoding sub-bands to indicate TPMI, K and N are positive integers, the N precoding sub-bands comprise the K first frequency domain resources, the number of second frequency domain resources at intervals of any two adjacent first frequency domain resources in the first precoding sub-bands is smaller than X, X is a positive integer, the second frequency domain resources are not allocated to the terminal equipment, and the first precoding sub-bands are any one of the N precoding sub-bands;

The network device receives uplink data on the K first frequency domain resources, wherein the uplink data is based on the TPMI precoding of the N precoding sub-bands.

2. An uplink data transmission method, characterized in that the method comprises:

The terminal equipment receives first information and second information from network equipment, wherein the first information is used for indicating K first frequency domain resources, the first frequency domain resources are allocated to the terminal equipment, the second information is used for indicating TPMI (transmission power division multiplexing) of N precoding sub-bands, K and N are positive integers, the N precoding sub-bands comprise the K first frequency domain resources, the number of second frequency domain resources at intervals of any two adjacent first frequency domain resources in the first precoding sub-bands is smaller than X, and X is a positive integer;

and the terminal equipment transmits uplink data on the K first frequency domain resources, wherein the uplink data is based on the TPMI precoding of the N precoding sub-bands.

3. The method of claim 1 or 2, wherein the N pre-coding sub-bands respectively comprise frequency domain resources that do not overlap each other.

4. A method according to any of claims 1-3, wherein the least indexed frequency domain resource and/or the most indexed frequency domain resource in the first pre-coding sub-band is the first frequency domain resource.

5. The method of any of claims 1-4, wherein among the N pre-coding subbands there is a second pre-coding subband and a third pre-coding subband, a first index is greater than a second index, a difference between the first index and the second index is greater than Y, Y is a positive integer, wherein the first index is an index of a frequency domain resource with a smallest index in the second pre-coding subband, and the second index is an index of a frequency domain resource with a largest index in the third pre-coding subband.

6. The method according to any of claims 1-5, wherein the first information and/or the second information is carried by downlink control information, DCI.

7. The method of any of claims 1-6, wherein of the N pre-coding subbands there is a fourth pre-coding subband and a fifth pre-coding subband, the fourth pre-coding subband having a maximum index of frequency resources that is less than a minimum index of frequency resources in the fifth pre-coding subband, the fourth pre-coding subband comprising a number of frequency domain resources that is greater than or equal to a number of frequency domain resources that the fifth pre-coding subband comprises.

8. The method of any of claims 1-7, wherein among the N pre-coding subbands there is a fourth pre-coding subband and a fifth pre-coding subband, a maximum index of frequency resources in the fourth pre-coding subband is less than a minimum index of frequency resources in the fifth pre-coding subband, and a difference between the maximum index of frequency resources in the fourth pre-coding subband and the minimum index is less than or equal to a difference between the maximum index of frequency resources in the fifth pre-coding subband and the maximum index of frequency resources in the fourth pre-coding subband.

9. The method of any of claims 1-6, wherein of the N pre-coding subbands there is a fourth pre-coding subband and a fifth pre-coding subband, the fourth pre-coding subband having a maximum index of frequency resources that is less than a minimum index of frequency resources in the fifth pre-coding subband, the fourth pre-coding subband comprising a number of frequency domain resources that is less than or equal to a number of frequency domain resources that the fifth pre-coding subband comprises.

10. The method according to any of claims 1-6 or 9, wherein among the N pre-coding subbands there is a fourth pre-coding subband and a fifth pre-coding subband, the maximum index of the frequency resources in the fourth pre-coding subband being smaller than the maximum index of the frequency resources in the fifth pre-coding subband, the difference between the maximum index and the minimum index of the frequency resources in the fifth pre-coding subband being smaller than or equal to the difference between the minimum index of the frequency resources in the fifth pre-coding subband and the minimum index of the frequency resources in the fourth pre-coding subband.

11. The method according to any of claims 1-10, wherein among the N pre-coding sub-bands, any two pre-coding sub-bands comprise frequency domain resources having a difference in number of frequency domain resources with an absolute value less than or equal to Z, Z being a positive integer.

12. The method of any of claims 1-11, wherein the K first frequency domain resources belong to a plurality of frequency domain resource groups, the plurality of frequency domain resource groups comprising frequency domain resources that do not overlap each other, wherein each frequency domain resource group comprises one or more precoding subbands, and wherein a total number of precoding subbands comprising the plurality of frequency domain resource groups is less than or equal to N.

13. The method of claim 12, wherein the number of precoding subbands formed by an ith frequency-domain resource group is determined based on the number of frequency-domain resources included in the ith frequency-domain resource group and P, where i is a positive integer and P is determined based on the value of K and the value of N, where the ith frequency-domain resource group is any one of the plurality of frequency-domain resource groups.

14. The method of claim 13, wherein the number of frequency domain resources included in each of the precoding subbands in the ith frequency domain resource group is determined based on the number of frequency domain resources included in the ith frequency domain resource group and the number of precoding subbands in the ith frequency domain resource group.

15. The method of any one of claim 12 to 14, wherein,Or alternativelyWherein C1 is an integer.

16. The method of any of claims 1-15, wherein the presence of at least one of the N pre-coding subbands comprises the second frequency domain resource.

17. The method according to any of claims 2-16, further comprising, before the terminal device transmits uplink data on the K first frequency domain resources:

and the terminal equipment determines the N precoding sub-bands according to the K first frequency domain resources.

18. An uplink data transmission method, characterized in that the method comprises:

the network equipment sends third information and fourth information to the terminal equipment, wherein the third information is used for indicating frequency domain resources corresponding to M carriers respectively, and the fourth information is used for indicating TPMI of N precoding sub-bands, N and M are positive integers;

And the network equipment receives uplink data on frequency domain resources corresponding to the M carriers respectively, wherein the uplink data is based on the TPMI precoding of the N precoding sub-bands.

19. An uplink data transmission method, characterized in that the method comprises:

The terminal equipment receives third information and fourth information from network equipment, wherein the third information is used for indicating frequency domain resources corresponding to M carriers respectively, and the fourth information is used for determining the TPMI of N precoding sub-bands, wherein N and M are positive integers;

The terminal equipment determines the N precoding sub-bands according to the frequency domain resources respectively corresponding to the M carriers;

And the terminal equipment transmits uplink data on the frequency domain resources corresponding to the M carriers respectively, wherein the uplink data is based on the TPMI precoding of the N precoding sub-bands.

20. The method of claim 18 or 19, wherein the third information and/or the fourth information is carried by DCI.

21. The method of any of claims 18-20, wherein the frequency domain resources corresponding to each of the M carriers form one or more precoding subbands, and a sum of the number of precoding subbands formed by the frequency domain resources corresponding to each of the M carriers is less than or equal to N.

22. The method of claim 21, wherein the number of precoding subbands formed by the frequency domain resources corresponding to the jth carrier is determined according to the total number of frequency domain resources corresponding to the jth carrier, and Q, where j is a positive integer, and j is any one of the M carriers, and Q is determined according to the total number of frequency domain resources corresponding to the M carriers and the value of N.

23. The method of claim 22, wherein each precoding subband comprised of frequency domain resources corresponding to the jth carrier comprises a number of frequency domain resources determined based on a total number of frequency domain resources corresponding to the jth carrier and a number of precoding subbands comprised of frequency domain resources corresponding to the jth carrier.

24. The method of claim 22 or 23, wherein,Or alternativelyWherein C2 is an integer, and W _j is the total number of frequency domain resources corresponding to the jth carrier.

25. A communication device comprising means or modules for performing the method of any of claims 1-24.

26. A communication device is characterized by comprising one or more processors; the one or more processors are configured to perform the method of any of claims 1-24.

27. A readable storage medium, characterized in that the readable storage medium comprises a program which, when run on an apparatus, causes the apparatus to perform the method of any one of claims 1-24.

28. A computer program product comprising a computer program or instructions which, when executed by a communication device, implement the method of any one of claims 1-24.