CN117856839A

CN117856839A - Method and device for data transmission

Info

Publication number: CN117856839A
Application number: CN202211217591.9A
Authority: CN
Inventors: 杨培; 李铁; 陈雷; 樊波; 余政
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2024-04-09
Also published as: WO2024067244A1

Abstract

The application provides a data transmission method and device, which can improve the reliability of data transmission. The method comprises the following steps: the terminal equipment receives first information from the network equipment, wherein a first field in the first information is used for indicating a first number of data streams transmitted according to a first precoding matrix and a second number of data streams transmitted according to a second precoding matrix; the terminal equipment determines a first demodulation reference signal (DMRS) port set and a second DMRS port set according to a third quantity and a second field in the first information, wherein the third quantity is equal to the sum of the first quantity and the second quantity; the terminal equipment sends a first number of data streams to the network equipment according to the first DMRS port set, and sends a second number of data streams to the network equipment according to the second DMRS port set, wherein the number of the DMRS ports included in the first DMRS port set is equal to the first number, the number of the DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

Description

Method and device for data transmission

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for data transmission.

Background

The fifth generation communication system (5th generation,5G) uses Beamforming (BF) to improve the transmission power of the transmission direction signal, improve the received signal-to-interference-and-noise ratio (signal to interference plus noise ratio, SINR), and further improve the performance of the communication system. In the implementation of the beamforming technique, the antenna panel is the core component, and the beam is transmitted or received through the antenna panel. In a 5G NR deployment implementation, since directional beams are used, both base stations and terminal devices are deployed using multiple antenna panels in order to meet wide area coverage.

At present, it is proposed in R18 that a terminal device adopts two antenna panels to transmit data streams to a base station on a physical uplink shared channel (physical uplink shared channel, PUSCH), and adopts a stream number combination support of 1+1, 2+1, and 2+2 for transmitting data streams to the base station by using 2 antenna panels; however, how to support the problem of using 2 antenna panels to transmit a data stream to a base station with a stream number combination of 1+2 is in need of solving. In addition, the current protocols are also unable to support dynamic switching of multi-antenna panel and single-antenna panel transmissions.

Disclosure of Invention

The application provides a data sending method and device, which can support the stream number combination 1+2 of data streams transmitted to network equipment by 2 antenna panels of terminal equipment, and can improve the reliability of data transmission.

In a first aspect, a method for data transmission is provided, which can be executed by a chip or a chip system on the terminal device side. The method comprises the following steps: the method comprises the steps that a terminal device receives first information from a network device, wherein the first information comprises a first field and a second field, the first field is used for indicating a first number of data streams sent by the terminal device according to a first precoding matrix and a second number of data streams sent by the terminal device according to a second precoding matrix, and the first number and the second number are positive integers; the terminal equipment determines a first demodulation reference signal (DMRS) port set and a second DMRS port set according to a third quantity and the second field, wherein the total quantity of the DMRS ports included in the first DMRS port set and the second DMRS port set is equal to the third quantity, and the third quantity is equal to the sum of the first quantity and the second quantity; the terminal device sends the first number of data streams to the network device according to the first DMRS port set, sends the second number of data streams to the network device according to the second DMRS port set, the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

Specifically, if the first number is equal to the number of DMRS ports included in the first DMRS port set, and the second number is equal to the number of DMRS ports included in the second DMRS port set, the terminal device sends the first number of data streams to the network device according to the first DMRS port set, and the terminal device sends the second number of data streams to the network device according to the second DMRS port set. If the first number is equal to the number of DMRS ports included in the second DMRS port set, and the second number is equal to the number of DMRS ports included in the first DMRS port set, the terminal device sends the first number of data streams to the network device according to the second DMRS port set, and sends the second number of data streams to the network device according to the first DMRS port set.

Based on the above technical solution, the terminal device may determine, according to the first information sent by the network device, a first number of data flows sent according to a first precoding matrix (first antenna panel) and a second number of data flows sent according to a second precoding matrix (second antenna panel), and when the first number is not equal to the second number, the terminal device may send, to the network device, the first number of data flows according to a DMRS port set including DMRS ports equal to the first number, and send, to the network device, the second number of data flows according to a DMRS port set including DMRS ports equal to the second number. The embodiment of the application can support the stream number combination 2+1 of the data streams transmitted to the network equipment by the terminal equipment by adopting the 2 antenna panels, and can also support the stream number combination 1+2 of the data streams transmitted to the network equipment by adopting the 2 antenna panels, thereby improving the reliability of data transmission. Compared with the stream number combination 1+2 of the data stream transmitted on the PDSCH in order to support 2 TRPs in R16, adding the DMRS port set {0,2,3} in the DMRS table, the embodiment of the present application does not need to add the DMRS port set {0,2,3} in the DMRS table, and can make the protocol of R18 compatible/multiplex the protocol of R17, thereby improving the compatibility of the protocol of R18.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes: the terminal equipment receives second information from the network equipment, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams sent by the terminal equipment according to a third precoding matrix and a fourth number of data streams sent by the terminal equipment according to a fourth precoding matrix, the third number is equal to zero, and the fourth number is a positive integer; the terminal equipment determines a third DMRS port set according to the fourth number and the fourth field, wherein the number of the DMRS ports included in the third DMRS port set is equal to the fourth number; and the terminal equipment sends the fourth number of data streams to the network equipment according to the third DMRS port set.

Based on the technical scheme, the terminal equipment can determine to adopt the single antenna panel to transmit the data stream to the network equipment according to the second information transmitted by the network equipment, so that the dynamic switching between the multi-antenna panel transmission and the single antenna panel transmission can be realized.

With reference to the first aspect, in certain implementations of the first aspect, the first field and the third field include precoding information and a number of streams field, or a channel sounding reference signal resource indication SRI field, and the second field and the fourth field include an antenna port field.

In a second aspect, a method of data transmission is provided, which may be performed by a chip or a chip system on the network device side. The method comprises the following steps: the network device sends first information to the terminal device, wherein the first information comprises a first field and a second field, the first field is used for indicating a first number of data streams sent by the terminal device according to a first precoding matrix and a second number of data streams sent by the terminal device according to a second precoding matrix, and the second field is used for determining a first DMRS port set and a second DMRS port set by the terminal device, and the first number and the second number are positive integers; the network device receives the first number of data streams from the terminal device according to the first DMRS port set, receives the second number of data streams from the terminal device according to the second DMRS port set, wherein the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

The method provided by the second aspect is a network-side method corresponding to the first aspect, and the beneficial effects thereof can be directly referred to the first aspect.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network device sends second information to the terminal device, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams sent by the terminal device according to a third precoding matrix and a fourth number of data streams sent by the terminal device according to a fourth precoding matrix, the fourth field is used for determining a third DMRS port set by the terminal device, the third number is equal to zero, and the fourth number is a positive integer; and the network device receives the fourth number of data streams from the terminal device according to the third DMRS port set, wherein the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

With reference to the second aspect, in certain implementations of the second aspect, the first field and the third field include precoding information and a number of streams field, or an SRI field, and the second field and the fourth field include an antenna port field.

In a third aspect, a method of data transmission is provided, which may be performed by a chip or a chip system at a terminal device side. The method comprises the following steps: the terminal equipment receives second information from the network equipment, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams sent by the terminal equipment according to a third precoding matrix and a fourth number of data streams sent by the terminal equipment according to a fourth precoding matrix, the third number is equal to zero, and the fourth number is a positive integer; the terminal equipment determines a third DMRS port set according to the fourth number and the fourth field, wherein the number of the DMRS ports included in the third DMRS port set is equal to the fourth number; and the terminal equipment sends the fourth number of data streams to the network equipment according to the third DMRS port set.

With reference to the third aspect, in certain implementations of the third aspect, the third field includes precoding information and a number of streams field, or an SRI field, and the fourth field includes an antenna port field.

In a fourth aspect, a method of data transmission is provided, which may be performed by a chip or a chip system on the network device side. The method comprises the following steps: the network device sends second information to the terminal device, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams sent by the terminal device according to a third precoding matrix and a fourth number of data streams sent by the terminal device according to a fourth precoding matrix, the fourth field is used for determining a third DMRS port set by the terminal device, the third number is equal to zero, and the fourth number is a positive integer; and the network device receives the fourth number of data streams from the terminal device according to the third DMRS port set, wherein the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

The method provided by the fourth aspect is a method of the network side corresponding to the third aspect, and the advantageous effects thereof can be directly referred to the third aspect.

With reference to the fourth aspect, in some implementations of the fourth aspect, the third field includes precoding information and a number of streams field, or SRI field, and the fourth field includes an antenna port field.

In a fifth aspect, a communication apparatus is provided, which may be applied to the terminal device in the first aspect, and the apparatus includes: a transceiver unit configured to receive first information from a network device, where the first information includes a first field and a second field, where the first field is configured to indicate a first number of data streams transmitted according to a first precoding matrix and a second number of data streams transmitted according to a second precoding matrix, and the first number and the second number are positive integers; a processing unit, configured to determine a first demodulation reference signal DMRS port set and a second DMRS port set according to a third number and the second field, where the total number of DMRS ports included in the first DMRS port set and the second DMRS port set is equal to the third number, and the third number is equal to a sum of the first number and the second number; the transceiver unit is further configured to send the first number of data flows to the network device according to the first DMRS port set, send the second number of data flows to the network device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, the transceiver unit is further configured to receive second information from the network device, where the second information includes a third field and a fourth field, where the third field is used to indicate a third number of data streams sent according to a third precoding matrix and a fourth number of data streams sent according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer; the processing unit is further configured to determine, according to the fourth number and the fourth field, a third DMRS port set, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number; the transceiver unit is further configured to send the fourth number of data flows to the network device according to the third DMRS port set.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first field and the third field include precoding information and a number of streams field, or an SRI field, and the second field and the fourth field include an antenna port field.

In a sixth aspect, there is provided a communication apparatus, which is applicable to the network device according to the second aspect, the apparatus comprising: a transceiver unit, configured to send first information to a terminal device, where the first information includes a first field and a second field, where the first field is configured to instruct the terminal device to send a first number of data flows according to a first precoding matrix and send a second number of data flows according to a second precoding matrix, and the second field is configured to determine a first DMRS port set and a second DMRS port set by the terminal device, where the first number and the second number are positive integers; the transceiver is further configured to receive the first number of data flows from the terminal device according to the first DMRS port set, and receive the second number of data flows from the terminal device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

With reference to the sixth aspect, in certain implementation manners of the sixth aspect, the transceiver unit is further configured to: transmitting second information to the terminal equipment, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams transmitted by the terminal equipment according to a third precoding matrix and a fourth number of data streams transmitted by the terminal equipment according to a fourth precoding matrix, the fourth field is used for determining a third DMRS port set by the terminal equipment, the third number is equal to zero, and the fourth number is a positive integer; and receiving the fourth number of data streams from the terminal equipment according to the third DMRS port set, wherein the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first field and the third field include precoding information and a number of streams field, or an SRI field, and the second field and the fourth field include an antenna port field.

A seventh aspect provides a communication apparatus, the apparatus being applicable to the terminal device according to the third aspect, the apparatus comprising: a transceiver unit, configured to receive second information from a network device, where the second information includes a third field and a fourth field, where the third field is configured to instruct the terminal device to send a third number of data streams according to a third precoding matrix and send a fourth number of data streams according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer; a processing unit, configured to determine a third DMRS port set according to the fourth number and the fourth field, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number; the transceiver unit is further configured to send the fourth number of data flows to the network device according to the third DMRS port set.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the third field includes precoding information and a number of streams field, or SRI field, and the fourth field includes an antenna port field.

An eighth aspect provides a communication apparatus, the apparatus being applicable to the network device according to the fourth aspect, the apparatus comprising: a transceiver unit, configured to send second information to a terminal device, where the second information includes a third field and a fourth field, where the third field is configured to instruct the terminal device to send a third number of data flows according to a third precoding matrix and a fourth number of data flows according to a fourth precoding matrix, and the fourth field is configured to determine a third DMRS port set by the terminal device, where the third number is equal to zero and the fourth number is a positive integer; the transceiver is further configured to receive, according to the third DMRS port set, the fourth number of data flows from the terminal device, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the third field includes precoding information and a number of streams field, or SRI field, and the fourth field includes an antenna port field.

A ninth aspect provides a communication device comprising: a processor and a memory storing computer code or instructions, wherein the processor runs the computer code or instructions such that the method of the first to fourth aspects or any possible implementation of the first to fourth aspects is performed by the communication device.

In a tenth aspect, there is provided a communication system comprising: a terminal device in the method of the first or third aspect and other communication devices in communication with the terminal device; the network device of the method of the second or fourth aspect and other communication devices in communication with the network device.

In an eleventh aspect, there is provided a computer readable storage medium storing computer code or instructions; the computer code or instructions, when executed by a processor, cause the method of any one of the possible implementations of the first to fourth aspects and the first to fourth aspects to be performed.

A twelfth aspect provides a computer program product comprising computer code or instructions which when executed cause the communication method of the first to fourth aspects and any one of the possible implementations of the first to fourth aspects to be implemented.

The solutions provided in the fifth to twelfth aspects are used to implement or cooperate to implement the methods provided in the first to fourth aspects, so that the same or corresponding benefits as those in the first to fourth aspects can be achieved, and no further description is given here.

Drawings

Fig. 1 is a schematic diagram of a network architecture to which embodiments of the present application are applicable. .

Fig. 2 is a schematic diagram of two typical antenna panels.

Fig. 3 is a schematic flow chart interaction diagram of a method for sending data according to an embodiment of the present application.

Fig. 4 is a schematic flow chart interaction diagram of another method for transmitting data provided in an embodiment of the present application.

Fig. 5 to 8 are schematic block diagrams of communication apparatuses of embodiments of the present application.

Fig. 9 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of another communication device of an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The embodiments of the present application may be applied to various communication systems, such as a wireless local area network system (wireless local area network, WLAN), a narrowband internet of things system (NB-IoT), a global system for mobile communications (global system for mobile communications, GSM), an enhanced data rates for GSM evolution system (enhanced data rate for GSM evolution, EDGE), a wideband code division multiple access system (wideband code division multiple access, WCDMA), a code division multiple access 2000 system (code division multiple access, CDMA 2000), a time division synchronous code division multiple access system (time division-synchronization code division multiple access, TD-SCDMA), a long term evolution system (long term evolution, LTE), satellite communications, sidelink (SL), a fifth generation (5th generation,5G) system, or new communication systems in the future, etc. The embodiments of the present application may be applied to various mobile communication scenarios, including but not limited to scenarios of transmission between a base station and a terminal device, point-to-point transmission between a terminal device, multi-hop/relay (relay) transmission of a base station and a terminal device, dual connectivity (dual connectivity, DC) or multiple connectivity of multiple base stations and terminal devices, and the like.

The terminal device referred to in the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, which have wireless communication functions. The terminal may be a subscriber Unit (UE), a User Equipment (UE), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a personal digital assistant (personal digital assistant, PDA) computer, a tablet, a wireless modem (modulator demodulator, modem), a laptop (laptop computer), a machine type communication (machine type communication, MTC) terminal, a wireless terminal in a self-driving (self-driving), etc. Wherein the user device comprises a vehicle user device. With the advent of internet of things (internet of things, IOT) technology, more and more devices that have not previously been provided with communication functions, such as, but not limited to, home appliances, vehicles, tool devices, service devices, and service facilities, began to obtain wireless communication functions by configuring a wireless communication unit so that the wireless communication network can be accessed and remote control can be accepted. Such devices are also included in the category of wireless communication devices because they are equipped with a wireless communication unit and have a wireless communication function. In addition, the terminal device may also be referred to as a Mobile Station (MS), a mobile device, a mobile terminal, a wireless terminal, a handheld device (handset), a client, etc.

The network device may be an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), a device-to-device (D2D) device that assumes a base station function, an Access Point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a radio relay Node, a radio backhaul Node, a transmission point (transmission point, TP), a transmission point (transmission and reception point, TRP), or the like, may be an antenna panel of a gNB or a transmission point (for example, TRP or TP) in NR, one or a group (including a plurality) of base stations in NR, or may be a network Node forming the gNB or transmission point, for example, a base band unit (building baseband unit, BBU) or a distributed unit (D2D), a network defining a network in a future network, a network of a vehicle-mounted device, a satellite, a network of a vehicle-mounted device, a network of a network, a network of a vehicle-mounted device, a network of a network, a network of a device, a vehicle, a network of a device, a system, a network of a device. In addition, base stations can be further classified into macro base stations for providing macro cells (macro cells), micro base stations for providing micro cells (pico cells), and femto base stations for providing femto cells (femto cells) according to the size of the service coverage area provided. As wireless communication technology continues to evolve, future base stations may also be referred to by other names.

The network equipment has a very rich product form. For example, in a product implementation, the BBU may be integrated within the same device as the radio frequency unit (radio frequency unit, RFU) that is connected to the antenna array by a cable (e.g., without limitation, a feeder). The BBU may also be provided separately from the RFU and coupled to communicate via fiber optic connections, such as, but not limited to, the common public radio interface (common public radio interface, CPRI) protocol. In this case, the RFU is commonly referred to as a remote radio unit (remote radio unit, RRU) which is connected to the antenna array by a cable. Furthermore, RRU may be integrated with the antenna array, for example, as is done with active antenna unit (active antenna unit, AAU) products currently on the market.

In addition, the BBU can be further broken down into multiple parts. For example, the BBU may be further subdivided into Centralized Units (CUs) and Distributed Units (DUs) in terms of the real-time nature of the traffic being processed. The CU is responsible for handling non-real time protocols and services, and the DU is responsible for handling physical layer protocols and real time services. Furthermore, part of the physical layer functions can be separated from the BBU or DU and integrated in the AAU.

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication equipment. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, and wireless communication between a terminal device and a terminal device. In this embodiment of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".

Fig. 1 is a schematic diagram of a network architecture to which embodiments of the present application are applicable. The network architecture comprises network equipment and terminal equipment, wherein the network equipment can be a base station. The network device may send a downlink signal or downlink information to the terminal device, and the terminal device may send an uplink signal or uplink information to the network device.

In order to facilitate understanding of the embodiments of the present application, the following description will simply describe the technical solutions related to the embodiments of the present application.

1. Antenna panel (antenna panel)

Compared with the transmission of the LTE with the low frequency band, the 5G NR is used for signal transmission with the newly increased high frequency band, and the high frequency band is generally considered to be a frequency band above 6GHz, such as a frequency band of 26GHz, 28GHz, 39GHz or 60GHz, in order to meet the three-large-scene requirement. The bandwidth can be increased by using the high-frequency band for signal transmission, and the transmission rate is improved; however, due to the high frequency of the high frequency band, the signal can be severely faded in the space propagation process, so that the coverage range of the signal is severely limited. Therefore, the 5G NR adopts a wave beam forming technology to improve the transmitting power of a signal in a transmitting direction, improve the receiving signal-to-interference-and-noise ratio and further improve the performance of a communication system. In the 5G NR research process, hybrid beamforming (hybrid beamforming, HBF) techniques including digital beamforming and analog beamforming are finally employed in consideration of cost and performance tradeoffs.

In the implementation of beamforming technology, the antenna panel is the core component. The beam is transmitted or received through the antenna panel. In a 5G NR deployment implementation, since directional beams are used, both base stations and terminal devices are deployed using multiple antenna panels in order to meet wide area coverage. Particularly, in order to satisfy wide area coverage, and in the case of limited space and cost saving, the effect of the deployment of the antenna panel on the communication performance is important.

Fig. 2 is a schematic diagram of two typical antenna panels. Typically a mobile terminal integrates 2 or 3 antenna panels, whereas a fixed terminal, e.g. a customer premises equipment (customer premises equipment, CPE)/fixed radio access (fixed wireless access, FWA) etc. may integrate more antenna panels, e.g. 4 or 8 antenna panels. It should be understood that the antenna panel in embodiments of the present application may be a set of antennas. Meanwhile, the antenna panel in the embodiment of the present application may be replaced by an "antenna set".

Alternatively, the set of antennas may be a set of antennas capable of controlling transmit power independently or individually. A group of antenna sets may also be antenna sets that can be independently or individually timed. A group of antenna sets may also be an independent or separate modulation coded antenna set.

In one implementation, the antenna panel in the embodiment of the present application may be one capability value set in the capability value set list of the terminal device. Therefore, the antenna panel in the embodiment of the present application may also be replaced with "capability value set". The capability value set may include a channel sounding reference signal (sounding reference signal, SRS) port number, a maximum SRS port number, a number of layers for Uplink (UL) transmission, a maximum number of layers for UL transmission, a coherence type of an antenna port, and the like.

Optionally, the set of capability values corresponds to a synchronization signal and a physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) resource indicator (SSB resource indicator, SSBRI), or the set of capability values corresponds to a channel-state information reference signal (CSI-state information reference signal, CSI-RS) resource indicator (CRI-RS resource indicator, CRI). Thus, an antenna panel may also be referred to as an SSBRI or CRI.

In one implementation, the antenna panel in embodiments of the present application may also be replaced with "SSBRI" or "CRI".

Alternatively, the correspondence between the set of capability values and the SSBRI, or the correspondence between the set of capability values and the CRI may be determined by the terminal device. The terminal device may report the corresponding relationship between the capability value set and the SSBRI or the corresponding relationship between the capability value set and the CRI to the network device in the beam reporting. Alternatively, the terminal device may report the set of capability values or SSBRI or CRI to the network device.

In one implementation, the antenna panel in the embodiments of the present application may be one SRS set. Thus, the antenna panel in this application may also be referred to as "SRS set".

Alternatively, in the embodiment of the present application, the definition of one antenna panel may be dynamically changed, for example, at time 1, one antenna panel includes a capability set of 4 SRS ports. At time 2 after time 1, the antenna panel may include a set of capabilities of 2 SRS ports.

2. PUSCH transmission based on codebook transmission (CB)

For codebook-based PUSCH transmission, pre-coding is required before data transmission. For the 2 antenna ports (ports), precoding matrices that can be used when transmitting 1 stream data are shown in table 1, and precoding matrices that can be used when transmitting 2 stream data are shown in table 2.

TABLE 1

TABLE 2

As can be seen from table 1 and table 2, there are 6 precoding matrices that can be used for transmitting 1 stream data by the 2 antenna ports, wherein index=0, and the two precoding matrices corresponding to 1 are uncorrelated (non-herent) precoding matrices; there are 3 precoding matrices that can be used for transmitting 2-stream data by the 2 antenna ports, wherein the precoding matrix corresponding to index=0 is an uncorrelated precoding matrix.

The base station instructs the terminal device to transmit a precoding matrix used for data stream transmission and a stream number (rank) of the data stream transmission on the PUSCH through precoding information and a stream number (precoding information and number of layers) field in downlink control information (downlink control information, DCI). An antenna port (antenna port) field in the DCI indicates a demodulation reference signal (demodulation reference signal, DMRS) port (DMRS port) for transmitting the DMRS.

The precoding matrix that can be used by the 2-antenna port to transmit 1-stream data and the precoding matrix that can be used by the 2-antenna port to transmit 2-stream data are put together to indicate 9 cases, and the precoding information and the stream number field need 4 bits (bits), as shown in table 3. Among the precoding matrices that can be used for transmitting 1-stream data by the 2-antenna ports and the precoding matrices that can be used for transmitting 2-stream data by the 2-antenna ports, uncorrelated precoding matrices can be put together to indicate, and 2+1=3 cases are total, and 2 bits are needed for the precoding information and the stream number domain, as shown in table 4.

TABLE 3 precoding information and stream number table (table)

Table 4 precoding information and stream number table

When the terminal equipment receives the DCI sent by the base station, firstly, the terminal equipment determines a precoding matrix used for transmitting the data stream on the PUSCH and the stream number of the data stream according to the precoding information in the DCI and the index value indicated by the stream number domain. Secondly, the terminal equipment determines a DMRS table (DMRS table) for searching the DMRS port according to the precoding information and the stream number of the transmission data stream indicated by the stream number domain; wherein, the number of streams of the data stream is different, and the DMRS table is also different. Finally, the terminal device determines the DMRS port for transmitting the data stream according to the determined DMRS table and the value (value) indicated by the anticonval port field in the DCI.

Taking the first DMRS type as an example, a DMRS table corresponding to 1 stream data is shown in table 5, and a DMRS table corresponding to 2 stream data is shown in table 6. Wherein the DMRS ports are associated with a DMRS code division multiplexing group (code division multiplexing group, CDM group) comprising DMRS CDM group 1 and DMRS CDM group 2.

Table 5 1 DMRS table corresponding to stream data

The value indicated by the antanna port field	DMRS port	DMRS CDM group
			0	0	1
1	1	1
			2	0	2
3	1	2
			4	2	2
5	3	2
			6～7	reserved	reserved

Table 6 2 DMRS table corresponding to stream data

The value indicated by the antanna port field	DMRS port	DMRS CDM group
			0	0，1	1
1	0，1	2
			2	2，3	2
3	0，2	2
			4～7	reserved	reserved

For example, the precoding information and the stream number field indicate that the terminal device transmits the stream number of the data stream on the PUSCH is 1, and the value indicated by the anticonva port field=0, then the terminal device transmits 1 stream data using the DMRS port 0. For another example, the precoding information and the stream number field indicate that the terminal device transmits the stream number of the data stream on the PUSCH is 2, and the value indicated by the anticonva port field=1, then the terminal device transmits 2-stream data using the DMRS port 0 and the DMRS port 1.

3. PUSCH transmission based on non-codebook transmission (NCB)

The non-codebook based PUSCH transmission differs from the codebook based PUSCH transmission in that:

(1) Based on PUSCH transmission of the codebook, the base station indicates precoding information and a stream number domain; based on the PUSCH transmission of the non-codebook, the base station does not indicate precoding information and a stream number domain;

(2) Based on the PUSCH transmission of the codebook, the base station indicates the stream number of the data stream to be transmitted on the PUSCH through the precoding information and the stream number domain in the DCI; based on PUSCH transmission of non-codebook, the base station indicates the number of streams of data streams transmitted on PUSCH through a sounding reference signal (sounding reference signal, SRS) resource indication (SRS resource indication, SRI) field in DCI.

The SRI field in the DCI may include 2 bits, 3 bits, or 4 bits. The number of streams of the data stream indicated by the SRI fields of the different bits is shown in table 7; wherein N is _SRS Representing the number of bits the SRI field comprises. For example, if the higher layer indicates N _SRS =3, if the index value indicated by the SRI field in the dci is 2, the base station indicates the terminal device to transmit 1 stream data on PUSCH, and the precoding matrix adopted for transmitting PUSCH is the same as the precoding matrix adopted for transmitting SRS by the terminal device at SRS resource 2; if the higher layer indicates N _SRS =3, if the index value indicated by the SRI field in the dci is 4, the base station indicates the terminal device to transmit 2-stream data on PUSCH, and the precoding matrix adopted for transmitting PUSCH is the same as the precoding matrix adopted for the terminal device to transmit SRS in SRS resource 0 and SRS resource 2; if the higher layer indicates N _SRS =4, SRI field indicated cable in dci And if the index value is 10, the base station indicates the terminal equipment to transmit 3-stream data on the PUSCH, and the precoding matrix adopted by the PUSCH transmission is the same as the precoding matrix adopted by the terminal equipment for SRS transmission in SRS resource 0, SRS resource 1 and SRS resource 2.

TABLE 7 SRI table

When the terminal equipment receives the DCI sent by the base station, firstly, the terminal equipment determines the stream number of the data stream transmitted on the PUSCH and the precoding matrix adopted by the data stream transmitted on the PUSCH according to the index value indicated by the SRI domain in the DCI. And secondly, the terminal equipment determines a DMRS table for searching the DMRS port according to the stream number of the transmission data stream indicated by the SRI domain. Finally, the terminal device determines the DMRS port for transmitting the data stream according to the determined DMRS table and the value (value) indicated by the anticonval port field in the DCI, and the step is the same as the step of PUSCH transmission based on the codebook.

4. DMRS CDM group

The DMRS is used for related demodulation of a physical downlink shared channel (physical downlink shared channel, PDSCH) and a physical uplink shared channel (physical uplink shared channel, PUSCH). In the embodiment of the present application, the DMRS CDM group may be simply referred to as a CDM group.

The different DMRS types have different numbers of CDM groups, wherein the first DMRS type (DMRS-type 1) has 2 CDM groups, the second DMRS type (DMRS-type 2) has 3 CDM groups, each CDM group can be in one-to-one correspondence with at most 4 DMRS ports, and DMRS signals transmitted by DMRS ports in the same CDM group have a quasi co-location (QCL) relationship. Wherein, the frequencies of the DMRS signals sent by different DMRS ports in the same CDM group are the same; the DMRS signals transmitted by DMRS ports of different CDM groups have different frequencies.

5. Transmission configuration indication state (transmission configuration indicator state, TCI state) and QCL

1、QCL

The large scale properties of the channel experienced by the symbols on one of the antenna ports can be deduced from the large scale properties of the symbols on the other port. For example, two different signals are transmitted from two closely spaced antenna ports, and the channel conditions experienced by the two different signals may not be the same due to fading, but the large scale parameters of the two channels may be the same. In this case, the two signals are quasi co-located, although they correspond to different antenna ports. It will also be appreciated that if certain large scale parameters of the two antenna ports are consistent, the terminal device may consider that the signals transmitted by the two antenna ports are from the same location, regardless of whether there is a difference in their actual physical locations. The large-scale parameters include parameters such as beam direction and the like.

2. Transmission configuration indication state (transmission configuration indicator state, TCI state)

In the protocol, the higher layer may configure the QCL relationship through the TCI state, for example, the TCI state may be used to configure the quasi co-sited relationship between the downlink reference signal and the DMRS corresponding to the PDSCH. The TCI state comprises one or two QCL relations, which characterize a certain consistency relation between the signal currently to be received or transmitted and a certain reference signal known before. If a reference signal has a QCL relationship with a signal to be received, the terminal device may receive the signal to be received by using a reception parameter when receiving the reference signal before; if a reference signal has a QCL relationship with a signal to be transmitted, the terminal device may transmit the signal to be transmitted using a transmission parameter when the reference signal was previously transmitted. In other words, TCI state may indicate a quasi co-sited relationship between reference signal a and reference signal B.

In the conventional TCI states defined by Rel-15/16, each TCI state may be configured with two source reference signals and a QCL relationship corresponding to the two source reference signals. For example QCL-Type1 indicates a Source reference signal (Source reference signal, source RS) 1 and a corresponding QCL Type X; QCL-Type2 represents the source reference signal 2 and the corresponding QCL Type Y. Wherein the QCL type X is different from the QCL type Y.

As another example, in the definition of a Unified (Unified) TCI state indication by the relevant protocol, a Unified source reference signal may be configured for different reference signals or channels. For example, when the terminal device receives and demodulates the physical downlink control channel (physical downlink control channel, PDCCH) and PDSCH, the required channel macro information may not be changed, so a Unified TCI state may be configured for the terminal device, where the Unified TCI state is used to indicate the channel macro information corresponding to the PDCCH and also is used to indicate the channel macro information of the PDSCH. The structure of one Unified TCI state can be understood with reference to the following:

the QCL-Info may be understood with reference to the description in the conventional TCI state structure, and this will not be described in detail in the embodiments of the present application.

The PDSCH is transmitted to one terminal device supporting 2 TRPs in R16, and the stream number combination of data streams transmitted on the PDSCH by 2 TRPs may be 1+1, 1+2, or 2+2. The number of streams of 2 TRP-transmitted data streams may be 1+2, and it is understood that the number of streams of data streams transmitted on PDSCH by a first TRP of 2 TRP is 1 and the number of streams of data streams transmitted on PDSCH by a second TRP of 2 TRP is 2.

To tell the terminal device the DMRS ports used by each TRP to transmit PDSCH, the protocol specifies that the base station informs the terminal device via DCI of one DMRS port set, which may be divided into 2 CDM groups. The base station transmits two TCI states to the terminal device, the first TCI state being bound to a first CDM group (CDM group 0), and the 2 nd TCI state being bound to a second CDM group (CDM group 1). And default to a first CDM group binding a first TRP and a second CDM group binding a second TRP.

In R16, when DMRS ports in the DMRS port set are divided into two CDM groups, the following cases are divided:

(1) When the number of stream combinations of 2 TRP-transmitted data streams is 1+1, the DMRS port set indicated by the base station is {0,2}, where DMRS port {0} belongs to 2 CDM groups, DMRS port {0} belongs to CDM group0, and DMRS port {2} belongs to CDM group 1.

(2) When the number of stream combinations of 2 TRP-transmitted data streams is 2+1, the DMRS port set indicated by the base station is {0,1,2}, and the DMRS port set {0,1,2} belongs to 2 CDM groups, where the DMRS port {0,1} belongs to CDM group0, and the DMRS port {2} belongs to CDM group 1.

(3) When the number of stream combinations of 2 TRP-transmitted data streams is 2+2, the DMRS port set indicated by the base station is {0,1,2,3}, the DMRS port set {0,1,2,3} belongs to 2 CDM groups, wherein the DMRS port {0,1} belongs to CDM group0, and the DMRS port {2,3} belongs to CDM group 1. Wherein DMRS port {0} and DMRS port {1} are bound to CDM group0, and DMRS port {2} and DMRS port {3} are bound to CDM group 1.

Since the current protocol does not support the stream number combination 1+2 of 2 data streams transmitted by TRP on PDSCH, DMRS port set {0,2,3} is added to the DMRS table for downlink transmission in the R16 standard, where {0} belongs to CDM group 0 and {2,3} belongs to CDM group 1, so that the stream number combination 1+2 of 2 data streams transmitted by TRP on PDSCH can be supported.

At present, it is proposed in R18 that a terminal device adopts two antenna panels to transmit data streams to a base station on a PUSCH, and adopts a stream number combination of 2 antenna panels to transmit data streams to the base station to support 1+1, 2+1 and 2+2; however, how to support the problem of using 2 antenna panels to transmit a data stream to a base station with a stream number combination of 1+2 is in need of solving. In addition, the current protocols are also unable to support dynamic switching of multi-antenna panel and single-antenna panel transmissions. The number of the data streams transmitted to the base station by using 2 antenna panels is 2+1, and it is understood that the number of the data streams transmitted to the base station by using a first antenna panel is 2 and the number of the data streams transmitted to the base station by using a second antenna panel is 1.

Therefore, the embodiment of the application provides a data sending method, which can realize that the number of stream combinations of data streams transmitted to the base station by using 2 antenna panels by the terminal equipment is 1+2, and can improve the reliability of data transmission.

Fig. 3 is a schematic flow chart interaction diagram of a method 300 for data transmission according to an embodiment of the present application. The network device in the embodiment of the present application may be a base station. The "field" and "domain" in the embodiments of the present application may have the same meaning, and are used to indicate a type of information. The precoding information and the number of streams field in the embodiments of the present application may also be a transmission precoding matrix indicator (transmission precoding matrix Indicator, TPMI) field.

310, the network device sends first information to the terminal device, where the first information includes a first field and a second field, where the first field is used to instruct the terminal device to send a first number of data streams according to a first precoding matrix and send a second number of data streams according to a second precoding matrix, and the second field is used by the terminal device to determine a first DMRS port set and a second DMRS port set used when sending the data streams. Wherein the first number and the second number are positive integers. The first information may be first DCI. The terminal device includes two antenna panels.

It may be understood that the first field is used to indicate a first number of data streams transmitted by the terminal device and a first precoding matrix used when transmitting the first number of data streams, and the first field is used to indicate a second number of data streams transmitted by the terminal device and a second precoding matrix used when transmitting the second number of data streams.

Optionally, the first field includes precoding information and a stream number field. Illustratively, the precoding information and the stream number field include first precoding information and stream number field, which indicate a first number of data streams transmitted by the terminal device according to the first precoding matrix, and second precoding information and stream number field, which indicate a second number of data streams transmitted by the terminal device according to the second precoding matrix.

Optionally, the first field includes an SRI field. Illustratively, the SRI field includes a first SRI field and a second SRI field, where the first SRI field indicates a first number of data streams transmitted by the terminal device according to the first precoding matrix, and the second SRI field indicates a second number of data streams transmitted by the terminal device according to the second precoding matrix.

Optionally, the second field includes an antenna port (antenna port) field.

The first precoding information and the number of streams field in the first field are used for indicating a first number of data streams transmitted by a first antenna panel of the two antenna panels according to a first precoding matrix, and the second precoding information and the number of streams field in the first field are used for indicating a second number of data streams transmitted by a second antenna panel of the two antenna panels according to a second precoding matrix. It is understood that the first antenna panel is associated with the first precoding information and the number of streams field and the second antenna panel is associated with the second precoding information and the number of streams field.

Illustratively, the first precoding information and the number of streams field in the first field are used to indicate a first number of data streams sent by the terminal device according to the first TCI state, and the second precoding information and the number of streams field in the first field are used to indicate a second number of data streams sent by the terminal device according to the second TCI state. Wherein the first TCI state may indicate a first beam direction and the second TCI state may indicate a second beam direction. It can be appreciated that the first TCI state is associated with the first precoding information and the stream number field; the second TCI state is associated with second precoding information and a stream number field. It is understood that the first TCI state is associated with the first antenna panel; a second TCI state is associated with the second antenna panel. It is understood that the first TCI state is associated with the first antenna panel and/or the first TCI state is associated with the first precoding information and the number of streams field; the second TCI state is associated with the second antenna panel and/or the second TCI state is associated with the second precoding information and the stream number field.

Illustratively, a first SRI field in the first field is used to indicate a first number of data streams transmitted by a first one of the two antenna panels and a second SRI field in the first field is used to indicate a second number of data streams transmitted by a second one of the two antenna panels. It is understood that a first antenna panel is associated with a first SRI field and a second antenna panel is associated with a second SRI field.

Illustratively, a first SRI field in the first field is used to indicate a first number of data flows sent by the terminal device according to the first TCI state, and a second SRI field in the first field is used to indicate a second number of data flows sent by the terminal device according to the second TCI state. Wherein the first TCI state may indicate a first beam direction and the second TCI state may indicate a second beam direction. It is understood that the first TCI state is associated with the first SRI field; the second TCI state is associated with a second SRI field. It is understood that the first TCI state is associated with the first antenna panel; a second TCI state is associated with the second antenna panel. It is understood that the first TCI state is associated with the first antenna panel and/or the first TCI state is associated with the first SRI field; the second TCI state is associated with the second antenna panel and/or the second TCI state is associated with the second SRI field.

The terminal device receives 320 the first information from the network device.

And 330, the terminal equipment determines a first DMRS port set and a second DMRS port set according to the first information. Specifically, the terminal device determines, according to the third number and the second field, a first DMRS port set and a second DMRS port set, where the total number of DMRS ports included in the first DMRS port set and the second DMRS port set is equal to the third number. Wherein the third number is equal to a sum of the first number and the second number.

Specifically, the terminal device determines a first number of data streams transmitted according to a first precoding matrix and a second number of data streams transmitted according to a second precoding matrix according to a first field in the first information; the terminal equipment determines that the total number of the data streams is equal to the third number; the terminal equipment determines the DMRS table corresponding to the third number, and determines all DMRS ports for transmitting the data stream according to the value indicated by the second field and the DMRS table corresponding to the third number. The terminal equipment determines a first DMRS port set and a second DMRS port set according to all the DMRS ports used for transmitting the data stream; the union set of the first DMRS port set and the second DMRS port set is all DMRS ports used for transmitting data streams, and each DMRS port is bound to one DMRS port set. For example, all DMRS ports used for transmitting the data stream include DMRS port 0, DMRS port 1, and DMRS port 2, DMRS port 0, DMRS port 1 are bound to a first set of DMRS ports, DMRS port 2 is bound to a second set of DMRS ports, and the first set of DMRS ports includes DMRS port 0 and DMRS port 1, and the second set of DMRS ports includes DMRS port 2. The first DMRS port set in the embodiments of the present application may be referred to as a first DMRS CDM group (DMRS CDM group 0), and the second DMRS port set may be referred to as a second DMRS CDM group (DMRS CDM group 1). Alternatively, it may be understood that all DMRS ports for transmitting a data stream determined according to the first information in the embodiments of the present application may be divided into two CDM groups, where the first DMRS port set associates one CDM group of the two CDM groups, and the second DMRS port set associates the other CDM group of the two CDM groups.

340, the terminal device sends a first number of data streams to the network device according to the first DMRS port set, sends a second number of data streams to the network device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number. In other words, the terminal device transmits a first number of data streams to the network device according to the first DMRS CDM group, and transmits a second number of data streams to the network device according to the second DMRS CDM group.

It may be understood that if the first number is equal to the number of DMRS ports included in the first DMRS port set, the terminal device sends a first number of data flows to the network device according to the first DMRS port set, and sends a second number of data flows to the network device according to the second DMRS port set.

It may be understood that if the first number is equal to the number of DMRS ports included in the first DMRS port set, the terminal device sends a first number of data streams to the network device according to the first DMRS port set and the first precoding matrix, and sends a second number of data streams to the network device according to the second DMRS port set and the second precoding matrix.

It may be understood that when the first number is not equal to the second number, if the first number is equal to the number of DMRS ports included in the first DMRS port set, the terminal device sends the first number of data flows to the network device according to the first DMRS port set, and sends the second number of data flows to the network device according to the second DMRS port set.

It may be understood that when the first number is not equal to the second number, if the first number is equal to the number of DMRS ports included in the first DMRS port set, the terminal device sends the first number of data streams to the network device according to the first DMRS port set and the first precoding matrix, and sends the second number of data streams to the network device according to the second DMRS port set and the second precoding matrix.

For example, if the first number is equal to the number of DMRS ports included in the first DMRS port set, the first antenna panel of the terminal device sends a first number of data streams to the network device according to the first DMRS port set and the first precoding matrix, and the second antenna panel of the terminal device sends a second number of data streams to the network device according to the second DMRS port set and the second precoding matrix. At this point, it may be understood that the first DMRS port set is associated with the first antenna panel, and/or the first DMRS port set is associated with the first precoding information and the stream number field, and/or the first DMRS port set is associated with the first SRI field, and/or the first DMRS port set is associated with the first TCI state. The second set of DMRS ports is associated with a second antenna panel and/or the second set of DMRS ports is associated with second precoding information and a number of streams field and/or the second set of DMRS ports is associated with a second SRI field and/or the second set of DMRS ports is associated with a second TCI state.

350, the network device receives a first number of data streams from the terminal device according to the first DMRS port set, and receives a second number of data streams from the terminal device according to the second DMRS port set, where the first DMRS port set includes a number of DMRS ports equal to the first number, and the second DMRS port set includes a number of DMRS ports equal to the second number, and the first number is not equal to the second number.

Optionally, when the first number is not equal to the second number, if the first number is equal to the number of DMRS ports included in the second DMRS port set, and the second number is equal to the number of DMRS ports included in the first DMRS port set, the terminal device sends the first number of data streams to the network device according to the second DMRS port set, and sends the second number of data streams to the network device according to the first DMRS port set.

In an exemplary embodiment, when the first number is not equal to the second number, if the first number is equal to the number of DMRS ports included in the second DMRS port set, the first antenna panel of the terminal device sends the first number of data streams to the network device according to the second DMRS port set and the first precoding matrix, and the second antenna panel of the terminal device sends the second number of data streams to the network device according to the first DMRS port set and the second precoding matrix. At this point, it may be understood that the second DMRS port set is associated with the first antenna panel, and/or the second DMRS port set is associated with the first precoding information and the stream number field, and/or the second DMRS port set is associated with the first SRI field, and/or the second DMRS port set is associated with the first TCI state; the first set of DMRS ports is associated with the second antenna panel and/or the first set of DMRS ports is associated with the second precoding information and the stream number field and/or the first set of DMRS ports is associated with the second SRI field and/or the first set of DMRS ports is associated with the second TCI state.

Correspondingly, the network device receives a first number of data streams from the terminal device according to the second DMRS port set, receives a second number of data streams from the terminal device according to the first DMRS port set, the second DMRS port set includes a number of DMRS ports equal to the first number, and the first DMRS port set includes a number of DMRS ports equal to the second number.

In the embodiment of the present application, the "the first DMRS port set is associated with the first antenna panel", it may be understood that the first antenna panel sends a first number of data flows according to the first DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number; however, when the second DMRS port set includes a number of DMRS ports equal to the first number, "the second DMRS port set is associated with the first antenna panel," the first antenna panel transmits the first number of data streams according to the second DMRS port set.

It should be understood that the number of DMRS ports included in the DMRS port set employed when the terminal device transmits the first number of data streams is equal to the first number, and the number of DMRS ports included in the DMRS port set employed when the terminal device transmits the second number of data streams is equal to the second number.

For example, the first precoding information and the stream number field in the first information indicate that the first number is equal to 1, the second precoding information and the stream number field in the first information indicate that the second number is equal to 2, and the terminal device needs to transmit 1 stream data stream to the network device by using the first antenna panel and 2 stream data streams to the network device by using the second antenna panel; it is understood that the number of data streams transmitted by the terminal device to the network device using 2 antenna panels is combined to be 1+2. All DMRS ports indicated by the antana port field in the first information include DMRS port 0, DMRS port 1, and DMRS port 2; if DMRS port 0, DMRS port 1 and the first DMRS port set are bound, DMRS port 2 and the second DMRS port set are bound, the first DMRS port set includes DMRS port 0 and DMRS port 1, and the second DMRS port set includes DMRS port 2. Because the number of the data streams required to be transmitted by the first antenna panel is equal to the number of the DMRS ports included in the second DMRS port set, the number of the data streams required to be transmitted by the second antenna panel is equal to the number of the DMRS ports included in the first DMRS port set, and therefore the first antenna panel of the terminal device sends 1 stream of data stream to the network device according to the second DMRS port set, and sends 2 stream of data stream to the network device according to the first DMRS port set.

For another example, the first precoding information and the stream number field in the first information indicate that the first number is equal to 2, the second precoding information and the stream number field in the first information indicate that the second number is equal to 1, and the terminal device needs to transmit 2-stream data streams to the network device by using the first antenna panel and 1-stream data streams to the network device by using the second antenna panel; it is understood that the number of data streams transmitted by the terminal device to the network device using 2 antenna panels is combined to be 2+1. All DMRS ports indicated by the antana port field in the first information include DMRS port 0, DMRS port 1, and DMRS port 2; if DMRS port 0, DMRS port 1 and the first DMRS port set are bound, DMRS port 2 and the second DMRS port set are bound, the first DMRS port set includes DMRS port 0 and DMRS port 1, and the second DMRS port set includes DMRS port 2. Because the number of the data streams required to be transmitted by the first antenna panel is equal to the number of the DMRS ports included in the first DMRS port set, and the number of the data streams required to be transmitted by the second antenna panel is equal to the number of the DMRS ports included in the second DMRS port set, the first antenna panel of the terminal device sends 2-stream data streams to the network device according to the first DMRS port set, and sends 1-stream data streams to the network device according to the second DMRS port set.

In the technical solution provided in the embodiment of the present application, the terminal device may determine, according to first information sent by the network device, a first number of data flows sent according to a first precoding matrix (first antenna panel) and a second number of data flows sent according to a second precoding matrix (second antenna panel), and when the first number is not equal to the second number, the terminal device may send, to the network device, the first number of data flows according to a DMRS port set including DMRS ports with a number equal to the first number, and send, to the network device, the second number of data flows according to a DMRS port set including DMRS ports with a number equal to the second number. The embodiment of the application can support the stream number combination 2+1 of the data streams transmitted to the network equipment by the terminal equipment by adopting the 2 antenna panels, and can also support the stream number combination 1+2 of the data streams transmitted to the network equipment by adopting the 2 antenna panels, thereby improving the reliability of data transmission. Compared with the stream number combination 1+2 of the data stream transmitted on the PDSCH in order to support 2 TRPs in R16, adding the DMRS port set {0,2,3} in the DMRS table, the embodiment of the present application does not need to add the DMRS port set {0,2,3} in the DMRS table, and can make the protocol of R18 compatible/multiplex the protocol of R17, thereby improving the compatibility of the protocol of R18.

It should be understood that in the embodiment of the present application, DMRS port sets {0,2,3} may be added to the DMRS table, and when the terminal device adopts 2 antenna panels to transmit data streams to the network device on the PUSCH, the flow number combination 1+2 of the data streams transmitted by the 2 antenna panels to the network device may be supported. The embodiments of the present application are not limited in this regard.

Optionally, each antenna panel is bonded to one DMRS port set when the first number is equal to the second number. If the first DMRS port set is bound to the first antenna panel, and the second DMRS port set is bound to the second antenna panel, the first antenna panel of the terminal device sends a first number of data streams to the network device according to the first DMRS port set, and the second antenna panel of the terminal device sends a second number of data streams to the network device according to the second DMRS port set. Wherein the first antenna panel is associated with the first precoding information and the number of streams field and the second antenna panel is associated with the second precoding information and the number of streams field. It is understood that the first TCI state is associated with the first precoding information and the stream number field and the second TCI state is associated with the second precoding information and the stream number field. It is understood that the first TCI state is associated with the first antenna panel; a second TCI state is associated with the second antenna panel. It is understood that the first TCI state is associated with the first antenna panel and/or the first TCI state is associated with the first precoding information and the number of streams field; the second TCI state is associated with the second antenna panel and/or the second TCI state is associated with the second precoding information and the stream number field.

For example, the first precoding information and the number of streams field in the first information indicate that the first number is equal to 1, and the second precoding information and the number of streams field indicate that the second number is equal to 1, that is, the number of streams combination of the data streams transmitted to the network device by the terminal device using 2 antenna panels is 1+1; all DMRS ports indicated by the second field in the first information include DMRS port 0 and DMRS port 2, and if DMRS port 0 is bound to the first DMRS port set and DMRS port 2 is bound to the second DMRS port set, the first DMRS port set includes DMRS port 0 and the second DMRS port set includes DMRS port 2. Therefore, the first antenna panel of the terminal device sends 1-stream data to the network device according to the first DMRS port set, and sends 1-stream data to the network device according to the second DMRS port set.

It should be understood that, in the embodiment of the present application, the first DMRS port set is bound to the first antenna panel, and it is understood that the first antenna panel can only transmit the first number of data flows according to the first DMRS port set. The second DMRS port set is bound to the second antenna panel, which can be understood that the second antenna panel can only transmit the second number of data streams according to the second DMRS port set.

Optionally, the network device sends second information to the terminal device, where the second information includes a third field and a fourth field, and the third field indicates a third number of data streams sent by the terminal device according to a third precoding matrix and a fourth number of data streams sent by the terminal device according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer. The second information may be second DCI. It can be understood that the first information is used to instruct the terminal device to transmit the data stream to the network device by adopting two antenna panels at the same time, and the first information is used to instruct the dual antenna panels to transmit; the second information is used for indicating the terminal equipment to transmit the data stream to the network equipment by adopting one antenna panel, and the second information is used for indicating the single antenna panel to transmit.

It may be understood that the third field is used to indicate a third number of data streams transmitted by the terminal device and a third precoding matrix used when transmitting the third number of data streams, and the fourth field is used to indicate a fourth number of data streams transmitted by the terminal device and a fourth precoding matrix used when transmitting the fourth number of data streams. Optionally, the fourth field includes an anticnna port field.

Optionally, the third field includes precoding information and a stream number field. Illustratively, the precoding information and the stream number field include third precoding information and stream number field and fourth precoding information and stream number field, where the third precoding information and the stream number field indicate a third number of data streams sent by the terminal device according to the third precoding matrix, and the fourth precoding information and the stream number field indicate a fourth number of data streams sent by the terminal device according to the fourth precoding matrix.

Optionally, the third field includes an SRI field. Illustratively, the SRI field includes a third SRI field and a fourth SRI field, where the third SRI field indicates a third number of data streams transmitted by the terminal device according to a third precoding matrix, and the fourth SRI field indicates a fourth number of data streams transmitted by the terminal device according to a fourth precoding matrix.

The third precoding information and the number of streams field in the third field are used for indicating a third number of data streams transmitted by the first antenna panel of the two antenna panels according to the third precoding matrix, and the fourth precoding information and the number of streams field in the third field are used for indicating a fourth number of data streams transmitted by the second antenna panel of the two antenna panels according to the fourth precoding matrix. It is understood that the first antenna panel is associated with third precoding information and a number of streams field and the second antenna panel is associated with fourth precoding information and a number of streams field.

The third SRI field in the third field is used to indicate a third number of data streams transmitted by the first antenna panel of the two antenna panels according to a third precoding matrix, and the fourth SRI field in the third field is used to indicate a fourth number of data streams transmitted by the second antenna panel of the two antenna panels according to a fourth precoding matrix. It is understood that the first antenna panel is associated with a third SRI field and the second antenna panel is associated with a fourth SRI field.

Correspondingly, the terminal device receives the second information from the network device. And if the third number of the indication in the second information is equal to zero, the terminal equipment determines a third DMRS port set according to the fourth number and the fourth field, wherein the number of DMRS ports included in the third DMRS port set is equal to the fourth number. Specifically, the terminal device determines the DMRS table corresponding to the fourth number, and determines, according to the value indicated by the fourth field and the DMRS table corresponding to the fourth number, a third DMRS port set for transmitting the fourth number of data streams.

And the terminal equipment sends a fourth number of data streams to the network equipment according to the third DMRS port set. It may be understood that the terminal device sends a fourth number of data streams to the network device according to the third DMRS port set and the fourth precoding matrix. It may also be understood that the second antenna panel of the terminal device sends a fourth number of data streams to the network device according to the third DMRS port set and the fourth precoding matrix, and the first antenna panel of the terminal device does not send data streams to the network device. Correspondingly, the network device receives a fourth number of data streams from the terminal device according to the third DMRS port set

For CB transmission, the number of streams of the data stream transmitted by the antenna panel may be indicated by the precoding information and the number of streams field, and the R18 protocol may add an indication state to the existing precoding information and the number of streams table indicated by the number of streams field, to indicate that the antenna panel does not transmit the data stream. The precoding matrix that one antenna panel can use to transmit 1-stream data and the precoding matrix that one antenna panel can use to transmit 2-stream data are indicated together as shown in table 8. The uncorrelated precoding matrices may be put together for indication as shown in table 9.

Table 8 precoding information and stream number table

Table 9 precoding information and stream number table

For example, if the index value indicated by the third precoding information and the stream number field is 9 and the index value indicated by the fourth precoding information and the stream number field is 7, the first antenna panel does not transmit a data stream, and the second antenna panel transmits a data stream of 2 streams according to the fourth precoding matrix.

Alternatively, the second information may jointly indicate the third precoding information and stream number field (precoding information and stream number 1) and the fourth precoding information and stream number field (precoding information and stream number 2), where the third precoding information and stream number table are as shown in table 10, and each antenna panel has 9+1=10 cases, and the two antenna panels have 100 cases, and one of the two antenna panels is omitted, so that the total number of cases is 99. If the third and fourth precoding information and stream number fields are indicated by different fields, respectively, each of the precoding information and stream number fields indicates 9 cases, respectively, and each of the precoding information and stream number fields requires 4 bits. If the third precoding information and the stream number field and the fourth precoding information and the stream number field are indicated jointly, only 7 bits are required, and therefore, the communication overhead can be saved by indicating the third precoding information and the stream number field and the fourth precoding information and the stream number field jointly.

Table 10 precoding information and stream number table

For example, the R18 protocol may not add an indication state in the precoding information and the stream number table indicated by the third precoding information and the stream number field, and add two indication states in the precoding information and the stream number table indicated by the fourth precoding information and the stream number field for indicating the stream numbers of the data streams transmitted by the first antenna panel and the second antenna panel. A first one of the two newly added indication states may be used to indicate that the third precoding information and the number of streams indicated by the number of streams field are the number of streams of the data stream transmitted by the first antenna panel, and the second antenna panel does not transmit the data stream; the second of the two newly added indication states may be used to indicate that the third precoding information and the number of streams indicated by the number of streams field are the number of streams of the data stream transmitted by the second antenna panel, and the first antenna panel does not transmit the data stream.

Illustratively, the third precoding information and the stream number field indicate the precoding information and the stream number table are shown in table 3, and the fourth precoding information and the stream number field indicate the precoding information and the stream number table are shown in table 11.

Table 11 precoding information and stream number table

For NCB transmission, the SRI field may indicate the number of data streams sent by the antenna panel, and the R18 protocol may add an indication state to the existing SRI table indicated by the SRI field, to indicate that the antenna panel does not send data streams. The number of streams of the data stream indicated by the SRI fields of the different bits is shown in table 12.

TABLE 12SRI table

For example, N _SRS When the index value indicated by the third SRI field is 3 and the index value indicated by the fourth SRI field is 1, the first antenna panel does not transmit a data stream, and the second antenna panel transmits a data stream of 1 stream.

Also for example, N _SRS =3, the index value indicated by the third SRI field is 7, and the index value indicated by the fourth SRI field is 6, then the first antenna panel does not transmit a data stream, and the second antenna panel transmits a data stream of 3 streams.

Optionally, if the second information indicates that the third number is a positive integer and the fourth number is equal to zero, the terminal device determines a DMRS table corresponding to the third number, and determines, according to the value indicated by the fourth field and the DMRS table corresponding to the third number, a fourth DMRS port set for transmitting the third number of data flows. And the terminal equipment sends the third number of data streams to the network equipment according to the fourth DMRS port set. It may be understood that the terminal device transmits a third number of data streams to the network device according to the fourth DMRS port set and the third precoding matrix. It may also be understood that the first antenna panel of the terminal device transmits a third number of data streams to the network device according to the fourth DMRS port set and the third precoding matrix, and the second antenna panel of the terminal device does not transmit data streams to the network device.

In the above technical solution, the terminal device may determine to use the single antenna panel to transmit the data stream to the network device according to the second information sent by the network device, so as to implement dynamic switching between multi-antenna panel transmission and single antenna panel transmission.

The embodiment of the application provides a data transmission method, which can realize dynamic switching between multi-antenna panel transmission and single-antenna panel transmission and can improve the reliability of data transmission.

Fig. 4 is a schematic flow chart interaction diagram of a method 400 for data transmission provided in an embodiment of the present application. The network device in the embodiment of the present application may be a base station. The "field" and "domain" in the embodiments of the present application may have the same meaning, and are used to indicate a type of information.

410, the network device sends second information to the terminal device, where the second information includes a third field and a fourth field, and the third field indicates a third number of data streams sent by the terminal device according to a third precoding matrix and a fourth number of data streams sent by the terminal device according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer. The second information may be second DCI. It will be appreciated that the second information is used to instruct the terminal device to transmit the data stream to the network device using one antenna panel and the second information is used to instruct the single antenna panel to transmit.

The terminal device receives 420 the second information from the network device.

And 430, the terminal equipment third DMRS port set according to the second information. Specifically, since the third number is equal to zero in the indication in the second information, the terminal device determines a third DMRS port set according to the fourth number and the fourth field, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number. Specifically, the terminal device determines the DMRS table corresponding to the fourth number, and determines, according to the value indicated by the fourth field and the DMRS table corresponding to the fourth number, a third DMRS port set for transmitting the fourth number of data streams.

And 440, the terminal device sends a fourth number of data streams to the network device according to the third DMRS port set. It may be understood that the terminal device sends a fourth number of data streams to the network device according to the third DMRS port set and the fourth precoding matrix. It may also be understood that the second antenna panel of the terminal device sends a fourth number of data streams to the network device according to the third DMRS port set and the fourth precoding matrix, and the first antenna panel of the terminal device does not send data streams to the network device.

The network device receives 450 a fourth number of data streams from the terminal device according to the third DMRS port set.

For NCB transmission, the SRI field may indicate the number of data streams sent by the antenna panel, and the R18 protocol may add an indication state to the existing SRI table indicated by the SRI field, to indicate that the antenna panel does not send data streams. The number of streams of the data stream indicated by the SRI fields of the different bits is shown in table 10.

Having described the method for data transmission provided by the embodiments of the present application, an execution body for executing the method for data transmission described above will be described below. Fig. 5 is a schematic block diagram of a communication device 500 according to an embodiment of the present application. The apparatus may be applied or deployed in a terminal device in the embodiment of the method of fig. 3. The communication device 500 includes:

a transceiver unit 510, configured to receive first information from a network device, where the first information includes a first field and a second field, where the first field is used to indicate a first number of data streams sent according to a first precoding matrix and a second number of data streams sent according to a second precoding matrix, and the first number and the second number are positive integers;

a processing unit 520, configured to determine a first set of demodulation reference signal DMRS ports and a second set of DMRS ports according to a third number and the second field, where the total number of DMRS ports included in the first set of DMRS ports and the second set of DMRS ports is equal to the third number, and the third number is equal to a sum of the first number and the second number;

The transceiver 510 is further configured to send the first number of data flows to the network device according to the first DMRS port set, send the second number of data flows to the network device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

Optionally, the transceiver unit 510 is further configured to receive second information from the network device, where the second information includes a third field and a fourth field, and the third field is used to indicate a third number of data streams sent according to a third precoding matrix and a fourth number of data streams sent according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer;

the processing unit 510 is further configured to determine, according to the fourth number and the fourth field, a third DMRS port set, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number;

the transceiver unit is further configured to send the fourth number of data flows to the network device according to the third DMRS port set.

Optionally, the first field and the third field include precoding information and a number of streams field, or, an SRI field, and the second field and the fourth field include an antenna port field.

Fig. 6 is a schematic block diagram of a communication device 600 according to an embodiment of the present application. The apparatus may be applied or deployed in a network device in the method embodiment of fig. 3. The communication apparatus 600 includes:

a transceiver 610, configured to send first information to a terminal device, where the first information includes a first field and a second field, where the first field is configured to indicate a first number of data flows sent by the terminal device according to a first precoding matrix and a second number of data flows sent by the terminal device according to a second precoding matrix, and the second field is configured to determine a first DMRS port set and a second DMRS port set by the terminal device, where the first number and the second number are positive integers;

the transceiver 610 is further configured to receive the first number of data flows from the terminal device according to the first DMRS port set, and receive the second number of data flows from the terminal device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

Optionally, the transceiver unit 610 is further configured to:

transmitting second information to the terminal equipment, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams transmitted by the terminal equipment according to a third precoding matrix and a fourth number of data streams transmitted by the terminal equipment according to a fourth precoding matrix, the fourth field is used for determining a third DMRS port set by the terminal equipment, the third number is equal to zero, and the fourth number is a positive integer;

and receiving the fourth number of data streams from the terminal equipment according to the third DMRS port set, wherein the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

Fig. 7 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. The apparatus may be applied or deployed in a terminal device in the embodiment of the method of fig. 4. The communication device 700 includes:

a transceiver unit 710, configured to receive second information from a network device, where the second information includes a third field and a fourth field, where the third field is configured to instruct the terminal device to send a third number of data streams according to a third precoding matrix and a fourth number of data streams according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer;

A processing unit 720, configured to determine a third DMRS port set according to the fourth number and the fourth field, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number;

the transceiver unit 710 is further configured to send the fourth number of data flows to the network device according to the third DMRS port set.

Optionally, the third field includes precoding information and a number of streams field, or SRI field, and the fourth field includes an antenna port field.

Fig. 8 is a schematic block diagram of a communication device 800 according to an embodiment of the present application. The apparatus may be applied or deployed in a network device in the method embodiment of fig. 4. The communication device 800 includes:

a transceiver 810, configured to send second information to a terminal device, where the second information includes a third field and a fourth field, where the third field is configured to instruct the terminal device to send a third number of data flows according to a third precoding matrix and a fourth number of data flows according to a fourth precoding matrix, and the fourth field is configured to determine a third DMRS port set by the terminal device, where the third number is equal to zero and the fourth number is a positive integer;

The transceiver 810 is further configured to receive the fourth number of data streams from the terminal device according to the third DMRS port set, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

Fig. 9 is a schematic block diagram of a communication device 900 according to an embodiment of the present application.

The communication device 900 includes: a processor 910 and a memory 920 storing computer code or instructions, wherein the processor 910 executes the computer code or instructions such that the methods in the embodiments of the present application are performed by the communication device 900. The communication device 900 may be a terminal device in an embodiment of the present application.

Fig. 10 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application.

The communication device 1000 includes: a processor 1010 and a memory 1020 storing computer code or instructions, wherein the processor 1010 executes the computer code or instructions such that the methods in the embodiments of the present application are performed by the communication device 1000. The communication device 1000 may be a network device in an embodiment of the present application.

The processor 910 and the processor 1010 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The embodiment of the application also provides a communication system, which comprises the terminal equipment, other communication equipment, network equipment and other communication equipment, wherein the other communication equipment is communicated with the terminal equipment, and the other communication equipment is communicated with the network equipment.

The present application also provides a computer-readable storage medium having stored thereon a computer program for implementing the method in the above method embodiments. The computer program, when run on a computer, enables the computer to implement the method of the method embodiments described above.

Embodiments of the present application also provide a computer program product comprising computer program code for causing the method of the above-described method embodiments to be performed when said computer program code is run on a computer.

The embodiment of the application also provides a chip, which comprises a processor, wherein the processor is connected with a memory, the memory is used for storing a computer program, and the processor is used for executing the computer program stored in the memory, so that the chip executes the method in the embodiment of the method.

It should be understood that, in the embodiments of the present application, the numbers "first" and "second" … are merely for distinguishing different objects, such as for distinguishing the number of different information or data flows, and are not limited to the scope of the embodiments of the present application, but the embodiments of the present application are not limited thereto.

In addition, the term "and/or" in this application is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship; the term "at least one" in the present application may mean "one" and "two or more", for example, A, B and C may mean: the seven cases are that A alone, B alone, C alone, A and B together, A and C together, C and B together, A and B together, and C together.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of this application.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the system, apparatus and unit described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, comprising:

the method comprises the steps that a terminal device receives first information from a network device, wherein the first information comprises a first field and a second field, the first field is used for indicating a first number of data streams sent by the terminal device according to a first precoding matrix and a second number of data streams sent by the terminal device according to a second precoding matrix, and the first number and the second number are positive integers;

the terminal equipment determines a first demodulation reference signal (DMRS) port set and a second DMRS port set according to a third quantity and the second field, wherein the total quantity of the DMRS ports included in the first DMRS port set and the second DMRS port set is equal to the third quantity, and the third quantity is equal to the sum of the first quantity and the second quantity;

the terminal device sends the first number of data streams to the network device according to the first DMRS port set, sends the second number of data streams to the network device according to the second DMRS port set, the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

2. The method according to claim 1, wherein the method further comprises:

the terminal equipment receives second information from the network equipment, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams sent by the terminal equipment according to a third precoding matrix and a fourth number of data streams sent by the terminal equipment according to a fourth precoding matrix, the third number is equal to zero, and the fourth number is a positive integer;

the terminal equipment determines a third DMRS port set according to the fourth number and the fourth field, wherein the number of the DMRS ports included in the third DMRS port set is equal to the fourth number;

and the terminal equipment sends the fourth number of data streams to the network equipment according to the third DMRS port set.

3. A method according to claim 1 or 2, characterized in that,

the first field and the third field include precoding information and a number of streams field, or a channel sounding reference signal resource indication SRI field, and the second field and the fourth field include an antenna port field.

4. A method of data transmission, comprising:

The network device sends first information to the terminal device, wherein the first information comprises a first field and a second field, the first field is used for indicating a first number of data streams sent by the terminal device according to a first precoding matrix and a second number of data streams sent by the terminal device according to a second precoding matrix, and the second field is used for determining a first DMRS port set and a second DMRS port set by the terminal device, and the first number and the second number are positive integers;

the network device receives the first number of data streams from the terminal device according to the first DMRS port set, receives the second number of data streams from the terminal device according to the second DMRS port set, wherein the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

5. The method according to claim 4, wherein the method further comprises:

the network device sends second information to the terminal device, wherein the second information comprises a third field and a fourth field, the third field is used for indicating a third number of data streams sent by the terminal device according to a third precoding matrix and a fourth number of data streams sent by the terminal device according to a fourth precoding matrix, the fourth field is used for determining a third DMRS port set by the terminal device, the third number is equal to zero, and the fourth number is a positive integer;

And the network device receives the fourth number of data streams from the terminal device according to the third DMRS port set, wherein the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

6. The method according to claim 4 or 5, wherein,

the first field and the third field include precoding information and a number of streams field, or SRI field, and the second field and the fourth field include an antenna port field.

7. A method of data transmission, comprising:

8. The method of claim 7, wherein the step of determining the position of the probe is performed,

the third field includes precoding information and a number of streams field, or SRI field, and the fourth field includes an antenna port field.

9. A method of data transmission, comprising:

10. The method of claim 9, wherein the step of determining the position of the substrate comprises,

11. A communication device, comprising:

a transceiver unit configured to receive first information from a network device, where the first information includes a first field and a second field, where the first field is configured to indicate a first number of data streams transmitted according to a first precoding matrix and a second number of data streams transmitted according to a second precoding matrix, and the first number and the second number are positive integers;

a processing unit, configured to determine a first demodulation reference signal DMRS port set and a second DMRS port set according to a third number and the second field, where the total number of DMRS ports included in the first DMRS port set and the second DMRS port set is equal to the third number, and the third number is equal to a sum of the first number and the second number;

the transceiver unit is further configured to send the first number of data flows to the network device according to the first DMRS port set, send the second number of data flows to the network device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

12. The apparatus of claim 11, wherein the device comprises a plurality of sensors,

the transceiver unit is further configured to receive second information from the network device, where the second information includes a third field and a fourth field, where the third field is configured to indicate a third number of data streams sent according to a third precoding matrix and a fourth number of data streams sent according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer;

the processing unit is further configured to determine, according to the fourth number and the fourth field, a third DMRS port set, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number;

13. The device according to claim 11 or 12, wherein,

14. A communication device, comprising:

a transceiver unit, configured to send first information to a terminal device, where the first information includes a first field and a second field, where the first field is configured to instruct the terminal device to send a first number of data flows according to a first precoding matrix and send a second number of data flows according to a second precoding matrix, and the second field is configured to determine a first DMRS port set and a second DMRS port set by the terminal device, where the first number and the second number are positive integers;

The transceiver is further configured to receive the first number of data flows from the terminal device according to the first DMRS port set, and receive the second number of data flows from the terminal device according to the second DMRS port set, where the number of DMRS ports included in the first DMRS port set is equal to the first number, the number of DMRS ports included in the second DMRS port set is equal to the second number, and the first number is not equal to the second number.

15. The apparatus of claim 14, wherein the transceiver unit is further configured to:

16. The device according to claim 14 or 15, wherein,

17. A communication device, comprising:

a transceiver unit, configured to receive second information from a network device, where the second information includes a third field and a fourth field, where the third field is configured to instruct the terminal device to send a third number of data streams according to a third precoding matrix and send a fourth number of data streams according to a fourth precoding matrix, where the third number is equal to zero, and the fourth number is a positive integer;

a processing unit, configured to determine a third DMRS port set according to the fourth number and the fourth field, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number;

18. The apparatus of claim 17, wherein the device comprises a plurality of sensors,

19. A communication device, comprising:

a transceiver unit, configured to send second information to a terminal device, where the second information includes a third field and a fourth field, where the third field is configured to instruct the terminal device to send a third number of data flows according to a third precoding matrix and a fourth number of data flows according to a fourth precoding matrix, and the fourth field is configured to determine a third DMRS port set by the terminal device, where the third number is equal to zero and the fourth number is a positive integer;

the transceiver is further configured to receive, according to the third DMRS port set, the fourth number of data flows from the terminal device, where the number of DMRS ports included in the third DMRS port set is equal to the fourth number.

20. The apparatus of claim 19, wherein the device comprises a plurality of sensors,

21. A communication device, comprising: a processor and a memory storing computer code or instructions, wherein the processor executes the computer code or instructions such that the method of any of claims 1 to 10 is performed by the communication device.

22. A computer-readable storage medium, comprising:

the computer readable medium stores computer code or instructions;

the computer code or instructions, when executed by a processor, cause the method of any of claims 1 to 10 to be performed.

23. A computer program product comprising computer code or instructions which, when executed, cause the method of any of claims 1 to 10 to be implemented.