CN110351851B

CN110351851B - Data transmission method, terminal equipment and network equipment

Info

Publication number: CN110351851B
Application number: CN201810302369.6A
Authority: CN
Inventors: 刘显达; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2023-08-25
Anticipated expiration: 2038-04-04
Also published as: CN110351851A; WO2019192530A1

Abstract

The application provides a data transmission method, terminal equipment and network equipment, wherein the method comprises the following steps: the method comprises the steps that a terminal device obtains first indication information at an N-th sending moment, wherein the first indication information is used for indicating whether a first port used for sending a first signal is the same as a second port used for sending a second signal, the second signal is sent by the terminal device at an N-K sending moment, N and K are positive integers, and N is larger than K; the terminal equipment sends the first signal according to the first indication information; the first port includes at least one of the following information: a first antenna port used to transmit the first signal, a first precoding matrix used to transmit the first signal, and a first spatial filter used to transmit the first signal. The data transmission method, the terminal equipment and the network equipment are beneficial to improving the reliability of data transmission.

Description

Data transmission method, terminal equipment and network equipment

Technical Field

The present application relates to the field of communications, and in particular, to a data transmission method, a terminal device, and a network device in the field of communications.

Background

The fifth generation mobile communication technology (5th generation,5G) supports at least two downlink control information (downlink control information, DCI) formats for scheduling a physical uplink shared channel (physical uplink shared channel, PUSCH), and field contents contained in DCIs corresponding to different DCI formats and bit widths of the corresponding DCIs are different. For example, DCI format 0_0 (DCI format 0_0) includes time-frequency resource allocation information, modulation coding strategy (modulation coding strategy, MCS) information, but does not include sounding reference signal resource indication (SRS resource indication, SRI), transmission rank indication (Transmission rank indication, TRI), transmission precoding matrix indication (Transmission precoding matrix indication, TPMI) information, antenna port indication information, and the like; the DCI format 0_1 (DCI format 0_1) includes time-frequency resource allocation information, MCS, SRI, TRI and TPMI information, sounding reference signal (sounding reference signal, SRS) request information (SRS request for dynamically triggering SRS transmission), antenna port indication information, and the like. Bit widths corresponding to different DCI formats of the scheduled PUSCH may be different. The network device may configure at least one terminal device specific search space through higher layer signaling radio resource control (radio resource control, RRC), each search space corresponding to time-frequency resource configuration information, to enable the network device to detect DCI on the resource. Each search space contains configuration information of DCI formats, and generally only contains one type of DCI format for uplink scheduling, such as DCI format 0_0 or DCI format 0_1. And the terminal equipment determines a DCI format used for scheduling the PUSCH and corresponding DCI information by blindly detecting different search spaces.

Generally, the network device configures at least one SRS resource for the terminal device through RRC signaling, and the terminal device transmits an SRS on the SRS resource according to the received configuration information of the SRS resource; the network device receives and measures the SRS on the SRS resource, determines resource scheduling information (including time-frequency resource allocation, transmission mode, etc.) of the terminal device based on an implementation algorithm of the network device itself, and indicates SRI, TRI, TPMI, MCS and DMRS port information through DCI format 0_1.

In some cases, the network device will schedule PUSCH transmissions using DCI format 0_0 to transmit PDCCH. When the network device uses DCI format 0_0, the scheduled PUSCH transmission specified in the protocol adopts a single-port transmission mode, and the single-port transmission mode is that PUSCH and DMRS corresponding to PUSCH use a single port, and the number of transmission layers adopted for transmitting PUSCH is 1. This is because DCI format 0_0 is a reduced DCI format compared to format 0_1, which does not contain SRI, TRI, TPMI information and antenna port indication information of DMRS, and for the multi-port PUSCH transmission mode, the terminal device cannot obtain a correct multi-port PUSCH transmission mode, such as a PUSCH transmission port, a transmission layer number, and the like, through the above information. Therefore, the terminal device may determine the physical port, precoding vector or spatial filtering (collectively referred to herein as port information) for transmitting the PUSCH based on its implementation algorithm or by a predefined manner, which may result in that the network device cannot directly indicate the port information used for transmitting the PUSCH to the terminal device through DCI, and the reliability of data transmission is poor.

Disclosure of Invention

The application provides a data transmission method, terminal equipment and network equipment, which can indicate port information for sending a PUSCH to the terminal equipment and are beneficial to improving the reliability of data transmission.

In a first aspect, a data transmission method is provided, including: the method comprises the steps that a terminal device receives downlink information sent by a base station, wherein the downlink information is Cyclic Redundancy Check (CRC) codes subjected to mask scrambling;

the terminal obtains the mask according to the downlink information, wherein the mask comprises indication information for indicating whether the terminal equipment uses a port used for sending a second signal to send the first signal, and the terminal equipment sends the second signal before sending the first signal; and

and the terminal equipment determines a port for transmitting the first signal according to the indication information and transmits the first signal on the determined port.

According to the data transmission method, the first indication information indicates whether the port used by the first signal transmitted by the terminal equipment currently is the same as the port used by the second signal transmitted before, so that the terminal equipment determines the port information for transmitting the PUSCH according to the first indication information, and the reliability of data transmission is improved.

With reference to the first aspect, in certain implementations of the first aspect, the port that transmits the first signal includes one or more of the following information: antenna ports, precoding matrices, and spatial filtering.

With reference to the first aspect, in certain implementations of the first aspect, the first signal is a signal carried on a physical uplink shared channel PUSCH or a signal carried on a physical uplink control channel PUCCH.

With reference to the first aspect, in certain implementations of the first aspect, the second signal is a signal carried on PUSCH, a signal carried on PUCCH, or a random access preamble sequence.

With reference to the first aspect, in certain implementation manners of the first aspect, the downlink information is a CRC code of Downlink Control Information (DCI) scrambled by the mask.

With reference to the first aspect, in certain implementations of the first aspect, the mask is 16 bits, and the indication information is one or more bits of the mask.

With reference to the first aspect, in certain implementations of the first aspect, when a last bit of the mask has a value of 0, it indicates that a port that transmits the first signal and a port that transmits the second signal are the same.

With reference to the first aspect, in certain implementations of the first aspect, when a last bit of the mask has a value of 1, it indicates that a port that transmits the first signal and a port that transmits the second signal are different.

With reference to the first aspect, in certain implementations of the first aspect, the DCI is formatted as format 0_0 or format 0_1.

With reference to the first aspect, in certain implementation manners of the first aspect, an index value of the antenna port is X, an index value of the antenna port of a port transmitting the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

With reference to the first aspect, in certain implementation manners of the first aspect, an index value of the precoding matrix is Z, where an index value of the precoding matrix of a port that sends the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.

With reference to the first aspect, in some implementations of the first aspect, the frequency domain resource occupied by the second signal is the same as the frequency domain resource occupied by the first signal, or a portion of the frequency domain resource occupied by the second signal overlapping the frequency domain resource occupied by the first signal is greater than a specific value.

With reference to the first aspect, in certain implementations of the first aspect, the mask is used to indicate whether a port of the first signal is the same as a mask used for last indicated port information.

In other aspects of the present application, there is provided another data transmission method including: the method comprises the steps that terminal equipment receives Downlink Control Information (DCI) which is used for indicating first indication information and second indication information; the first indication information is first mask information or first scrambling code information, the first mask information is determined by the terminal equipment through downlink control information DCI, the DCI carries a cyclic redundancy check code scrambled through the first mask information, the first scrambling code information is determined by the terminal equipment through downlink control information DCI, the DCI carries information bits scrambled through the first scrambling code information, and the second indication information is used for indicating an index value of SRS resources;

the terminal equipment determines the first antenna port according to the first indication information, the second indication information and a first mapping relation, wherein the first mapping relation is used for representing the corresponding relation between the first indication information, the second indication information and the antenna port of the terminal equipment.

Optionally, the format of the DCI is DCI format 0_1.

In a second aspect, there is provided another data transmission method, comprising: a base station scrambles a Cyclic Redundancy Check (CRC) code by using a mask to obtain the scrambled CRC code, wherein the mask comprises indication information for indicating whether a terminal device uses a port used for transmitting a second signal to transmit a first signal, wherein the second signal and the first signal are transmitted by the terminal device, and the second signal is transmitted before the first signal; and the base station sends the scrambled CRC code to the terminal equipment.

With reference to the second aspect, in certain implementations of the second aspect, the port that transmits the first signal includes one or more of the following information: antenna ports, precoding matrices, and spatial filtering.

With reference to the second aspect, in some implementations of the second aspect, the first signal is a signal carried on a physical uplink shared channel PUSCH or a signal carried on a physical uplink control channel PUCCH.

With reference to the second aspect, in certain implementations of the second aspect, the second signal is a signal carried on PUSCH, a signal carried on PUCCH, or a random access preamble sequence.

With reference to the second aspect, in some implementations of the second aspect, the scrambled CRC code is a Downlink Control Information (DCI) CRC code scrambled with the mask.

With reference to the second aspect, in some implementations of the second aspect, the mask is 16 bits, and the indication information is one or more bits of the mask.

With reference to the second aspect, in some implementations of the second aspect, when a last bit of the mask has a value of 0, it indicates that a port that transmits the first signal and a port that transmits the second signal are the same.

With reference to the second aspect, in some implementations of the second aspect, when a last bit of the mask has a value of 1, it indicates that a port that transmits the first signal and a port that transmits the second signal are different.

With reference to the second aspect, in some implementations of the second aspect, the DCI is formatted 0_0 or formatted 0_1.

With reference to the second aspect, in some implementations of the second aspect, the index value of the antenna port is X, the index value of the antenna port of the port that sends the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

With reference to the second aspect, in some implementations of the second aspect, an index value of the precoding matrix is Z, where an index value of the precoding matrix of a port that sends the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.

With reference to the second aspect, in certain implementations of the second aspect, the first indication information is used to indicate that the first port is the same as the second port; or the first indication information is used for indicating that the index value of the first precoding matrix is Z, wherein the index value of the second precoding matrix is Z+1 or Z-1, and Z is a positive integer greater than 1.

With reference to the second aspect, in some implementations of the second aspect, the frequency domain resources occupied by the second signal are the same as the frequency domain resources occupied by the first signal, or a portion of the frequency domain resources occupied by the second signal overlapping the frequency domain resources occupied by the first signal is greater than a certain specific value.

With reference to the second aspect, in certain implementations of the second aspect, the mask is used to indicate whether a port of the first signal is the same as a mask used for last indicated port information.

In a third aspect, a terminal device is provided for performing the method of the first aspect or any possible implementation of the first aspect. In particular, the terminal device comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, there is provided another base station for performing the method of the second aspect or any possible implementation of the second aspect. In particular, the network device comprises means for performing the method of the second aspect or any of the possible implementations of the second aspect.

In a fifth aspect, there is provided another terminal device comprising: a transceiver, a memory, and a processor. Wherein the transceiver, the memory and the processor are in communication with each other via an internal connection path, the memory being for storing instructions, the processor being for executing the instructions stored by the memory to control the receiver to receive signals and the transmitter to transmit signals, and when the processor executes the instructions stored by the memory, to cause the processor to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In a sixth aspect, there is provided another base station comprising: a transceiver, a memory, and a processor. Wherein the transceiver, the memory and the processor are in communication with each other via an internal connection path, the memory being for storing instructions, the processor being for executing the instructions stored by the memory to control the receiver to receive signals and the transmitter to transmit signals, and when the processor executes the instructions stored by the memory, to cause the processor to perform the method of the second aspect or any one of the possible implementations of the second aspect.

A seventh aspect provides a data transmission system comprising a terminal device in any one of the possible implementations of the third aspect or the third aspect and a base station in any one of the possible implementations of the fourth aspect or the fourth aspect; or alternatively

The system comprises a terminal device in the fifth aspect or any one of the possible implementation manners of the fifth aspect and a base station in the sixth aspect or any one of the possible implementation manners of the sixth aspect.

In an eighth aspect, there is provided a computer program product comprising: computer program code which, when run by a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In a ninth aspect, there is provided a computer program product comprising: computer program code which, when run by a computer, causes the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect.

In a tenth aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method of the first aspect or any possible implementation of the first aspect.

In an eleventh aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method of the second aspect or any possible implementation of the second aspect.

Drawings

Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the application.

Fig. 2 shows a schematic flow chart of a data transmission method according to an embodiment of the application.

Fig. 3 shows a schematic view of a scenario according to an embodiment of the application.

Fig. 4 shows another schematic view of a scenario according to an embodiment of the present application.

Fig. 5 shows another schematic view of a scenario according to an embodiment of the present application.

Fig. 6 shows a schematic block diagram of a terminal device according to an embodiment of the application.

Fig. 7 shows a schematic block diagram of a base station according to an embodiment of the application.

Fig. 8 shows a schematic block diagram of another terminal device according to an embodiment of the application.

Fig. 9 shows a schematic block diagram of another base station according to an embodiment of the present application.

Detailed Description

The technical scheme of the application will be described below with reference to the accompanying drawings.

It should be understood that the technical solution of the embodiment of the present application may be applied to various communication systems, for example: global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, future fifth generation (5th generation,5G) system, or New Radio (NR), etc.

It should also be understood that the technical solution of the embodiment of the present application may also be applied to various communication systems based on non-orthogonal multiple access technologies, such as a sparse code multiple access (sparse code multiple access, SCMA) system, although SCMA may also be referred to by other names in the communication field; further, the technical solution of the embodiment of the present application may be applied to a multi-carrier transmission system using a non-orthogonal multiple access technology, for example, an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM), a filter bank multi-carrier (FBMC), a general frequency division multiplexing (generalized frequency division multiplexing, GFDM), a filtered orthogonal frequency division multiplexing (F-OFDM) system, and the like using a non-orthogonal multiple access technology.

It should also be appreciated that in embodiments of the present application, a terminal device, which may be referred to as an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment, may communicate with one or more core networks via a radio access network (radio access network, RAN). An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc.

It should also be understood that in the embodiment of the present application, the network device may be used to communicate with the terminal device, where the network device may be a base station (base transceiver station, BTS) in a GSM system or a CDMA system, a base station (node B, NB) in a WCDMA system, an evolved base station (evolutional node B, eNB or eNode B) in an LTE system, or the network device may be a relay station, an access point, a vehicle device, a wearable device, a network side device in a future 5G network, or a network device in a future evolved PLMN network, etc.

The embodiment of the application can be applied to LTE systems and subsequent evolution systems such as 5G and the like, or other wireless communication systems adopting various wireless access technologies such as systems adopting access technologies such as code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, single carrier frequency division multiple access and the like, and is particularly suitable for scenes needing channel information feedback and/or applying a secondary precoding technology, such as wireless networks applying a Massive MIMO technology, wireless networks applying a distributed antenna technology and the like.

It should be understood that multiple-input multiple-output (MIMO) technology refers to using multiple transmit antennas and receive antennas at a transmitting end device and a receiving end device, respectively, so that signals are transmitted and received through the multiple antennas of the transmitting end device and the receiving end device, thereby improving communication quality. The system can fully utilize space resources, realize multiple transmission and multiple reception through a plurality of antennas, and can doubly improve the system channel capacity under the condition of not increasing frequency spectrum resources and antenna transmitting power.

MIMO can be classified into single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO). Based on the principle of multi-user beam forming, massive MIMO is characterized in that hundreds of antennas are arranged at a transmitting end device, respective beams are modulated for tens of target receivers, and tens of signals are transmitted simultaneously on the same frequency resource through spatial signal isolation. Therefore, the Massive MIMO technology can fully utilize the space degree of freedom brought by large-scale antenna configuration, and improves the frequency spectrum efficiency.

Fig. 1 is a schematic diagram of a communication system used in an embodiment of the present application. As shown in fig. 1, the communication system 100 includes a network device 102, and the network device 102 may include multiple antenna groups. Each antenna group may include one or more antennas, e.g., one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and an additional group may include antennas 112 and 114. In fig. 1, 2 antennas are shown for each antenna group, however, more or fewer antennas may be utilized for each group. The network device 102 may additionally include a transmitter chain and a receiver chain, each of which may include a number of components associated with signal transmission and reception, such as processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc., as will be appreciated by one skilled in the art.

Network device 102 may be in communication with a plurality of terminal devices, for example, network device 102 may be in communication with terminal device 116 and terminal device 122. However, it is to be appreciated that network device 102 can communicate with any number of terminal devices similar to terminal devices 116 or 122. Terminal devices 116 and 122 can be, for example, cellular telephones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.

As shown in fig. 1, terminal device 116 is in communication with antennas 112 and 114, where antennas 112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120. In addition, terminal device 122 is in communication with antennas 104 and 106, where antennas 104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

For example, in a frequency division duplex FDD system, forward link 118 can utilize a different frequency band than that used by reverse link 120, and forward link 124 can employ a different frequency band than that employed by reverse link 126, for example.

As another example, in time division duplex, TDD, and full duplex (full duplex) systems, forward link 118 and reverse link 120 can utilize a common frequency band and forward link 124 and reverse link 126 can utilize a common frequency band.

Each set of antennas and/or areas designed for communication is referred to as a sector of network device 102. For example, antenna groups can be designed to communicate to terminal devices in a sector of the areas covered by network device 102. During communication of network device 102 with terminal devices 116 and 122 via forward links 118 and 124, respectively, the transmit antennas of network device 102 may utilize beamforming to improve signal-to-noise ratio of forward links 118 and 124. Furthermore, mobile devices in neighboring cells may experience less interference when network device 102 transmits signals to terminal devices 116 and 122 that are randomly dispersed throughout the area of the associated coverage using beamforming, than when the network device transmits signals to all its terminal devices through a single antenna.

At a given time, network device 102, terminal device 116, or terminal device 122 can be a wireless communication transmitting device and/or a wireless communication receiving device. When transmitting data, the wireless communication transmitting device may encode the data for transmission. Specifically, the wireless communication transmitting apparatus may acquire a certain number of data bits to be transmitted to the wireless communication receiving apparatus through a channel, for example, the wireless communication transmitting apparatus may generate, receive from other communication apparatuses, or save in a memory, or the like, a certain number of data bits to be transmitted to the wireless communication receiving apparatus through a channel. Such data bits may be contained in a transport block or blocks of data, which may be segmented to produce a plurality of code blocks.

Furthermore, the communication system 100 may be a public land mobile network PLMN network or a device-to-device (D2D) network or a machine-to-machine (machine to machine, M2M) network or other networks, fig. 1 is a simplified schematic diagram for ease of understanding only, and other network devices may be included in the network, which are not shown in fig. 1.

For ease of understanding, the related art referred to herein will be described first.

In a new radio access technology (New Radio Access Technology, NR) system of the third generation partnership project (3rd Generation Partnership Project,3GPP), the downlink resources of the system are divided in time into a plurality of orthogonal frequency division multiplexing multiple access (Orthogonal Frequency Division Multiple, OFDM) symbols and in frequency into a number of subcarriers. The physical downlink control channel (Physical Downlink Control Channel, PDCCH) in the downlink typically occupies the first two or three OFDM symbols in one subframe. The PDCCH is used to carry downlink control information (Downlink Control Information, DCI). The DCI carries terminal device specific resource allocation and other control information that is terminal device specific or cell shared. A physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) in the uplink of the system is used to carry uplink transmit data, and a frequency domain signal is typically generated using discrete fourier transform Spread OFDM (DFT-Spread OFDM). In general, one slot (slot) generally includes 14 OFDM symbols. The system also defines the size of a physical Resource block (Physical Resource Block, PRB), one PRB contains 12 subcarriers in the frequency domain, and a certain subcarrier within a certain OFDM symbol is called a Resource Element (RE).

The sounding reference signal (Sounding Reference Signal, SRS) is mainly used for the network device to determine the uplink channel quality for uplink frequency selective scheduling. The time-frequency resource position occupied by the terminal device for transmitting the SRS and the related SRS transmission mode need to be determined according to the configuration information of the SRS resource indicated by the network device through RRC signaling, or further according to a medium access Control (MAC-CE) signaling or further according to DCI signaling. Each configuration information of the SRS resource at least comprises an index number of the SRS resource, time-frequency position information occupied by the SRS resource, a transmitting port number corresponding to the SRS resource and the like.

The uplink transmission includes an uplink transmission mode based on a codebook, and for the uplink transmission based on the codebook, one common way is that after the terminal device is in an RRC connection state, the network device configures SRS resource information through RRC signaling, after the terminal device successfully receives the RRC configuration information, the network device sends an SRS signal on a corresponding uplink time-frequency resource according to a configuration parameter of the SRS, and the network device receives and measures the SRS on the corresponding SRS time-frequency resource to obtain uplink channel information. The network equipment determines a time-frequency resource and a transmission scheme used for scheduling the terminal equipment to send the PUSCH through an implementation algorithm of the network equipment, and indicates the information to the terminal equipment through DCI signaling carried in the PDCCH used for scheduling the uplink. The transmission scheme at least includes spatial filtering information used by the terminal device to transmit PUSCH, rank indication (Transmission Rank Indicator, TRI), precoding indication (Transmission Precoding Matrix Indicator, TPMI), modulation and coding scheme (Modulation and Coding Scheme, MCS), antenna port indication information, and the like. After receiving the DCI scheduling PUSCH transmission, the terminal device performs PUSCH transmission according to the time-frequency resource and the transmission scheme indicated in the DCI. The TPMI is used to instruct phase weighting between transmit antennas of the terminal device, thereby improving transmission performance. It should be noted that, in the existing mechanism, the TPMI indicates that the precoding matrix weighting is a transmit antenna used for transmitting SRS by the terminal device. The terminal device transmits the SRS, including the indication result of TPMI, by using the phase weighting method between transmit antennas used for PUSCH. The terminal device needs to transmit a Demodulation reference signal (DMRS) associated with the PUSCH while transmitting the PUSCH, and the network device needs to perform channel estimation according to the DMRS when finishing the Demodulation of the PUSCH. The antenna port information included in the transmission scheme is a port number used for transmitting the DMRS. When the plurality of terminal devices perform MU-MIMO transmission, that is, the plurality of terminal devices occupy the same time-frequency resource to perform data transmission, the network device allocates different DMRS ports for different terminal devices to distinguish data information sent by the plurality of terminal devices in MU-MIMO transmission. Meanwhile, in NR, DMRS and PUSCH corresponding to the DMRS are supported for transmission using the same port number, which means that DMRS and PUSCH corresponding to the DMRS use the same transmission scheme.

The NR supports a high frequency band, particularly a millimeter wave band, having a larger available bandwidth. However, the high frequency band will result in a larger path loss. To overcome the larger propagation loss, NR widely adopts a signal transmission mechanism based on beamforming technology to compensate for the above loss in the signal propagation process through a larger antenna gain. The beamformed signals may include broadcast channels, data channels, control channels, synchronization signals, cell-specific reference signals, and the like. For the scene of the signal requiring beamforming, the determination of the optimal transceiving beam needs to be performed by carrying out beam training. The network device may instruct the terminal device with the result of beam training through signaling (including RRC, MAC-CE, and DCI) to inform the terminal device of the beams used to transceive the various reference signals and channels. The beams used by the terminal device to transmit information are referred to herein as spatial filtering information.

The spatial filtering information is used to associate the target resource with a certain reference signal. When the associated reference signal is SSB/PBCH, the terminal device transmits the SRS resource using the same spatial transmission filtering as the spatial transmission filtering (Spatial domain transmission filter) used to receive the SSB/PBCH; when the associated reference signal is a CSI-RS, the terminal equipment transmits the SRS resource to use the same spatial transmission filtering (Spatial domain transmission filter) as that used for receiving the CSI-RS; when the associated reference signal is an SRS, the terminal device transmits the SRS resource using the same spatial transmission filtering (Spatial domain transmission filter) as used to transmit the associated SRS. It should be appreciated that the spatial filtering information of channel a with reference to channel B indicates that the transmit beam employed by transmit channel a is the same as the transmit beam employed by transmit channel B.

In addition, at least two DCI formats for scheduling PUSCH are supported in NR, and field contents and corresponding DCI bit widths contained in DCIs corresponding to different DCI formats are different.

1. DCI Format 0_1

Herein, DCI format 0_1 includes time-frequency resource allocation information, MCS, SRI, TRI, TPMI information, SRS request information (SRS request for dynamically triggering SRS transmission), antenna port indication information, and the like. Specifically, DCI format 0_0 may include the following fields:

(1) DCI format indication information

(2) Carrier indication

(3) Uplink (UL)/Supplementary Uplink (SUL) indication

(4) Bandwidth portion (bandwidth part) indication

(5) Frequency domain resource location indication information: frequency domain resources for indicating allocation for PUSCH

(6) Time domain resource location indication information: time domain resources for indicating allocation for PUSCH

(7) Virtual Resource Block (VRB) to Physical Resource Block (PRB) mapping

(8) Frequency domain hopping identification

(9) Modulation coding scheme: information indicating modulation order of data block and target code rate

(10) New data indication

(11) Redundancy version

(12) Hybrid automatic repeat request (HARQ) process number

(13) First downlink allocation indication

(14) Second downlink allocation indication

(15) Transmit power control instruction

(16) SRS resource indication: when the network device configures the plurality of SRS resources through higher layer signaling, the signaling is used to indicate selection of one or more SRS resources from the plurality of SRS resources

(17) Precoding information and number of transmission layers: transmission layer number and corresponding precoding matrix for indicating PUSCH transmission use

(18) Antenna port: port number and port number for indicating DMRS associated with PUSCH

(19) SRS request

(20) CSI request

(21) Code Block Group (CBG) transmission information

(22) Phase tracking reference signal (Phase Tracking Reference Signal, PTRS) and DMRS associated (23) beta offset indication

(24) DMRS sequence initialization

2. DCI Format 0_0

Herein, DCI format 0_0 contains time-frequency resource allocation information and MCS information, and does not contain SRI, TRI, TPMI information, antenna port indication information, and the like. Specifically, DCI format 0_0 may include the following fields:

(1) DCI format indication information

(2) Frequency domain resource location indication information

(3) Time domain resource location indication information

(4) Frequency domain hopping identification

(5) Modulation coding scheme

(6) New data indication

(7) Redundancy version

(8) Hybrid automatic repeat request (HARQ) process number

(9) Transmit power control instruction

(10) Uplink/supplemental uplink indication

In some cases, the network device will schedule PUSCH transmissions using DCI format 0_0 to transmit PDCCH. Some of the above include at least:

(1) The network device does not configure the transmission mode through higher layer signaling, mainly the period of time between the initial access and the completion and validation of the RRC configuration; because the terminal equipment cannot receive any configuration information indicated by RRC signaling in the period of time, a transmission mechanism is required to be predefined by the protocol, namely, PUSCH single port transmission based on DCI format 0_0 scheduling is mainly because the transmission mechanism does not depend on the RRC signaling, and the transmission of the PUSCH can be completed by indicating parameters required by necessary PUSCH transmission through the DCI signaling;

(2) The terminal device for the cell edge schedules PUSCH for it using format 0_0. Because the terminal equipment at the cell edge mainly needs to solve the coverage problem, the coverage can be effectively improved by using a simplified DCI format, and at the moment, the use of DCI format 0_0 for scheduling data is reasonable;

(3) When the network device continuously schedules PUSCH transmission for the terminal device, in order to avoid scheduling delay as much as possible (a processing time is required from the network device to instruct SRS resources through DCI signaling to the terminal device to demodulate the DCI signaling to the terminal device to transmit SRS resources to the network device to complete measurement of SRS signals).

Bit widths corresponding to different DCI formats of the scheduled PUSCH may be different. The network device configures at least one terminal device specific search space through higher layer signaling RRC, each search space corresponding to time-frequency resource configuration information to enable the terminal device to perform DCI detection on the resource. Each search space contains configuration information of DCI formats, and generally only contains one type of DCI format for uplink scheduling, such as DCI format 0_0 or DCI format 0_1. The terminal device can determine a DCI format used for scheduling PUSCH and corresponding DCI information by blindly detecting different search spaces.

In the case that the network device uses DCI format 0_0, the terminal device may determine a physical port, precoding information, or spatial filtering (collectively referred to herein as port information) for transmitting PUSCH based on its implementation algorithm or by a predefined manner, which may result in that the network device cannot directly indicate to the terminal device through DCI port information used for transmitting PUSCH, and reliability of data transmission is poor.

It should be understood that in this context, ports include at least antenna ports (also referred to as physical ports), precoding information, or spatial filtering information, and that ports referred to herein are logical ports. The antenna ports refer to antenna ports (ue antenna ports) of the terminal device, and the precoding information includes RI and TPMI, which are used to indicate a precoding matrix.

Fig. 2 shows a schematic flow chart of a data transmission method 200 of an embodiment of the application. The method 200 may be applied to the communication system 100 shown in fig. 1, but embodiments of the application are not limited thereto.

S210, the network equipment transmits downlink information scrambled by first indication information at an N-th transmission moment, wherein the first indication information is used for indicating whether a first port used by a user terminal for transmitting a first signal is the same as a second port used by the user terminal for transmitting a second signal, the second signal is transmitted by the terminal equipment at an N-K transmission moment, N and K are both positive integers, and N is larger than K; correspondingly, the terminal equipment receives the downlink information and acquires the first indication information according to the downlink information;

s220, the terminal equipment sends the first signal according to the first indication information; the network device receives the first signal accordingly. Specifically, the terminal device may determine a first port for transmitting the first signal according to the first indication information, and transmit the first signal to the network device on the first port.

The first port includes at least one of the following information: a first antenna port used for transmitting the first signal, a first precoding matrix used for transmitting the first signal, and a first spatial filter used for transmitting the first signal;

the second port includes at least one of the following information: a second antenna port used to transmit the second signal, a second precoding matrix used to transmit the second signal, and a second spatial filter used to transmit the second signal.

Specifically, the network device may instruct, through the first indication information, whether a first port used by a first signal to be currently transmitted by the terminal device is the same as a second port used by a second signal transmitted at an nth-K transmission time, and the terminal device determines whether to refer to the second port used by the second signal according to the first indication information. It should be understood that the meaning of reference herein is to directly determine that the first port is identical to the second port, and the terminal device may specifically refer to an antenna port, a precoding matrix, spatial filtering information, or the like therein.

The terminal device may directly use the second port to send the first signal when the first indication information indicates that the first port is the same as the second port, and may randomly select the port to send the first signal when the first indication information indicates that the first port is not the same as the second port, or may send the first signal according to a predefined rule, which is not limited in the embodiment of the present application.

As an alternative embodiment, the first signal is: signals carried on the physical uplink shared channel PUSCH, or signals carried on the physical uplink control channel PUCCH.

It should be understood that the first signal may be a signal carried on PUSCH or a signal carried on PUCCH, which is not limited by the embodiment of the present application.

It should also be understood that in this context, the transmission time is a relative concept, representing the time when the terminal device transmits signals, e.g. the first signal is transmitted at the 2 nd transmission time, the second signal is transmitted at the 1 st transmission time, which may be the 5 th time unit, and the 1 st transmission time may be the 3 rd time unit, depending on the scheduling of the network device, which is not limited by the embodiment of the present application.

In addition, the terminal device may also refer to a transmission scheme of the second DMRS transmitted when the second signal is transmitted at the nth-K transmission time, and transmit the first DMRS at the nth transmission time.

It should be understood that when the terminal device sends the PUSCH or the PUCCH, it needs to send the corresponding DMRS at the same time for the base station to estimate the channel information of the PUSCH or the PUCCH so as to successfully demodulate the PUSCH or the PUCCH, where the corresponding DMRS refers to that the ports of the DMRS are the same as the ports and occupied frequency domain resources of the PUSCH or the PUCCH, and then the first DMRS may also determine the port information according to the same mechanism as the PUSCH or the PUCCH.

As an alternative embodiment, the second signal is any one of the following signals: a signal carried on PUSCH, a signal carried on PUCCH, a signal carried on a physical downlink control channel PDCCH, and a random access preamble sequence.

It should be understood that the second signal may be a signal carried on PUSCH, a signal carried on PUCCH, a signal carried on PDCCH, or a random access preamble sequence, which is not limited in the embodiment of the present application.

In addition, a transmission mode of the terminal device for transmitting the PUCCH reference to the last PUSCH may also be defined. Since port information used for transmitting PUCCH is determined based on an implementation algorithm of the terminal device itself, for example, a certain port is fixedly used for transmitting PUCCH, a transmission port thereof may not be most preferable due to time-varying characteristics of a channel. At this time, since the port used for transmitting PUSCH is based on the indication of the network device, the performance of transmitting data through the port may be better than that of PUCCH, and this PUCCH transmission may refer to PUSCH transmission.

As an alternative embodiment, k=1, i.e. the second signal is transmitted by the terminal device last before the first signal was transmitted.

The terminal equipment always carries out port adjustment of the first signal based on the signal transmitted last time, so that the port adjustment efficiency can be improved, and the throughput of the system can be further improved.

As an alternative embodiment, the first indication information is first mask information or first scrambling code information, where the first mask information is used to scramble a Cyclic Redundancy Check (CRC) code of Downlink Control Information (DCI), and the first scrambling code information is used to scramble information bits in the downlink control information.

Specifically, before the network device sends the downlink information, the network device firstly performs coding operation on the control information bits to be transmitted, the control information bits after coding can generate a CRC code of the control information bits through a check code generating polynomial, and sends the control information bits with CRC check bits attached, that is, the CRC code of the control information bits, after receiving the CRC code of the control information bits, the terminal device can perform modulo-2 division operation on the CRC code through the same generating polynomial, if the remainder is 0, it means that the terminal device correctly decodes the downlink information.

Further, a corresponding relation between different first masks and port hypothesis information adopted by different first signal transmission may be predefined, or the base station configures, through higher layer signaling, a corresponding relation between different first masks and port hypothesis information adopted by different first signal transmission by RRC signaling, where the port hypothesis information may be a port referencing the second signal or a port not referencing the second signal. After generating the CRC code, the network device may scramble the CRC code with the different first masks based on the correspondence between the different first masks and the port hypothesis information adopted by the different first signal transmissions, so that the CRC code scrambled with the first masks carries additional indication information. For example, the network device and the terminal device are known to have at least two first masks, each first mask corresponds to one port indication information, where the port indication information includes an antenna port of the terminal device, a precoding matrix, and the like, and the base station selects one first mask from the at least two first masks to scramble the CRC code based on the correspondence, so that the base station transmits different port indication information through different first mask scrambling. Based on the corresponding relation between different first masks of predefined or RRC configuration and port hypothesis information adopted by different first signal transmission, the terminal equipment learns from the received CRC code that the base station adopts one of the at least two first masks, so as to determine the first port used for transmitting the first PUSCH according to the first indication information.

Similarly, the first indication information may be first scrambling code information.

Specifically, it is necessary to scramble the information bits with specific first scrambling code information before the network device transmits the downlink information bits and before generating the CRC code of the control information bits.

Further, a corresponding relation between different first scrambling codes and port hypothesis information adopted by different first signal transmission may be predefined, or the base station configures, through higher layer signaling, a corresponding relation between different first scrambling codes and port hypothesis information adopted by different first signal transmission, where the port hypothesis information may be a port referencing the second signal or a port not referencing the second signal. The network device may enable the control information bits scrambled by the first scrambling code to carry additional indication information by scrambling the CRC code by the different first scrambling codes based on the corresponding relationship between the different first scrambling codes and the port hypothesis information adopted by the different first signal transmission. For example, the network device and the terminal device have at least two first scrambling codes, each first scrambling code corresponds to one port indication information, and the base station selects one first scrambling code from the at least two first scrambling codes to scramble the control information bit based on the corresponding relation, so that the base station scrambles through different first scrambling codes to transmit different port indication information. Based on the corresponding relation between different first scrambling codes of predefined or RRC configuration and port hypothesis information adopted by different first signal transmission, the terminal equipment learns from the received CRC code that the base station adopts one of the at least two first scrambling codes, so as to determine a first port used for transmitting the first PUSCH according to first indication information.

It should be understood that, the above first downlink control information may specifically be RRC signaling and DCI, that is, the network device indicates, through the RRC signaling, different bits in the first indication information to transfer specific information, and then indicates, through the DCI, a certain bit to notify the terminal device of the specific information corresponding to the bit, where the terminal device may finally obtain, based on the RRC signaling and the DCI, the specific information indicated by the base station.

As an alternative embodiment, the first mask information comprises 16 bits, one or more bits of the 16 bits being used to indicate whether the terminal device uses the second port to transmit the first signal.

Alternatively, the first indication information may be bits of the first mask information or the first scrambling information, where all bits take 0 to indicate that the first port is the same as the second port, all bits take 1 to indicate that the first port is different from the second port, or all bits take 1 to indicate that the first port is the same as the second port, and all bits take 0 to indicate that the first port is different from the second port.

As an alternative embodiment, the first mask information or the first scrambling code information is used to indicate that the first port and the second port are the same, or

The first mask information or the first scrambling code information is used for indicating that the first port is the same as the third port used by a third signal sent at the N-L sending moment, L is a positive integer, and L is smaller than N and larger than K;

the third port includes at least one of the following information:

a third antenna port used for transmitting the third signal, a third precoding matrix used for transmitting the third signal, and a third spatial filter used for transmitting the third signal.

Specifically, the first mask information or the first scrambling code information may indicate that the first port is the same as the second port corresponding to the second signal transmitted at the nth-K transmission time, or that the first port is the same as the third port corresponding to the third signal transmitted at the nth-L transmission time.

The network device and the terminal device pre-agree with L different first mask information or L different first scrambling information to respectively instruct the terminal device to transmit the port adopted by the PUSCH and the N-N at the N time ₁ The port adopted by the PUSCH transmitted at the moment is the same, and the port adopted by the terminal equipment for transmitting the PUSCH at the nth moment is the same as the N-N th port ₂ The port adopted by the PUSCH transmitted at the moment is the same as …, and the port adopted by the terminal equipment for transmitting the PUSCH at the nth moment is the same as the N-N th port _L The ports adopted by the PUSCH transmitted at the moment are the same, wherein n ₁ ，n ₂ ，…，n _L Are all positive integers less than N; or (b)

The base station configures L different first mask information or L different first scrambling code information through RRC signaling to respectively indicate a port and an N-N (physical uplink shared channel) used by the terminal equipment for sending the PUSCH at the N time ₁ The port adopted by the PUSCH transmitted at the moment is the same, and the port adopted by the terminal equipment for transmitting the PUSCH at the nth moment is the same as the N-N th port ₂ The port adopted by the PUSCH transmitted at the moment is the same as …, and the port adopted by the terminal equipment for transmitting the PUSCH at the nth moment is the same as the N-N th port _L The ports adopted by the PUSCH transmitted at the moment are the same, wherein n ₁ ，n ₂ ，…，n _L Are all positive integers less than N. When scheduling PUSCH transmitted at the N time, the base station selects one of L different first mask information or L different first scrambling code information to scramble DCI and then indicates the DCI to the terminal equipment, and the terminal equipment receives the DCI and determines the mask information used by the DCI to be one of L different first mask information or L different first scrambling code information through a decoding algorithm, thereby being based on base station pre-allocationThe corresponding relation between the first mask information and the port indication information which are firstly agreed, or the corresponding relation between the first mask information and the port indication information which are configured by the base station through RRC signaling is used for determining the port information indicated by the base station, namely the adopted port and the N-N-th _K The ports adopted by the PUSCH transmitted at the moment are the same, wherein K is an integer which is more than or equal to 1 and less than or equal to L.

As an optional embodiment, the first indication information is a first field in DCI, where the first field is used to indicate the first port; or (b)

The first indication information is a second field in the DCI, where the second field is used to indicate a modulation and coding scheme MCS used to transmit the first signal, and the first port is determined according to the MCS.

Specifically, the network device may send DCI to the terminal device, with the first field or the second field in the DCI as the first indication information. The first field is used for indicating the first port, and the second field is used for indicating the MCS, so that after receiving the DCI, the terminal device can directly determine the first port used for transmitting the first signal according to the first field in the DCI if the first field is first indication information, and can determine the MCS used for transmitting the first signal according to the second field in the DCI if the second field is first indication information, and then determine the first port used for transmitting the first signal according to the MCS.

It should be understood that, whether the first field indicates the first port directly or the second field indicates the first port, which may be agreed by a protocol or configured by high-level signaling, which is not limited by the embodiment of the present application.

As an optional embodiment, the first indication information is used to indicate that the first port is the same as the second port; or (b)

The first indication information is used for indicating that the index value of the first antenna port is X, wherein the index value of the second antenna port is X+1 or X-1, and X is a positive integer greater than 1.

Specifically, in the case where the first indication information indicates that the first port and the second port are different, the switching criteria of the antenna port (i.e., the physical port) used by the terminal device to transmit the first signal may be: switching is performed according to the index value sequence (or reverse sequence) of the antenna ports of the terminal device. For example, if the terminal device transmits the second signal using physical port 1, the terminal device transmits the first signal using physical port 2.

The first indication information is used for indicating that an index value of the SRS resource of the sounding reference signal corresponding to the first signal is Y, wherein the index value of the SRS resource corresponding to the second signal is Y+1 or Y-1, and Y is a positive integer greater than 1.

Specifically, in the case where the first indication information indicates that the first port and the second port are different, the switching criteria of the port used by the terminal device to transmit the first signal may be: and switching according to the index value sequence (or reverse sequence) of SRS resources of the terminal equipment. The network device configures at least one SRS resource for the terminal device, the SRS transmitted on the SRS resource is a precoded SRS, the SRS transmitted on each SRS resource corresponds to a feature vector, that is, a precoding matrix, and determines a switching sequence according to the index of the transmitted SRS resource, if the terminal device transmits the precoding matrix corresponding to the SRS resource 1 used for the second signal, the terminal device may transmit the precoding matrix corresponding to the SRS resource 2 used for the first signal.

The first indication information is used for indicating that the index value of the first precoding matrix is Z, wherein the index value of the second precoding matrix is Z+1 or Z-1, and Z is a positive integer greater than 1.

It should be understood that the set of precoding matrix indexes may be predefined or configured by the network device through higher layer signaling, which is not limited by the embodiment of the present application.

As an optional embodiment, the first indication information may also be used to inform the terminal device whether to send the first signal in a transmission mode of precoding matrix polling, and may also be used to inform the terminal device of the size of the precoding resource block group (Precoding Resource Block Group, PRG) for sending the PUSCH.

The precoding matrix polling means that different precoding matrices are adopted to transmit data on time-frequency resources according to a predefined granularity, for example, precoding matrix polling transmission with granularity of 1 Resource Block (RB) is that PUSCH is transmitted by adopting different precoding matrices for each RB occupied by PUSCH on a frequency domain, the granularity is PRG size, that is, PRG indicates that PUSCH is transmitted by adopting the minimum granularity of the same precoding matrix, for example, prg=2, and PUSCH transmitted on every two RBs adopts the same precoding matrix. It should be appreciated that the size of the PRG may be predefined.

The application also provides another data transmission method, which comprises the following steps: the method comprises the steps that terminal equipment receives Downlink Control Information (DCI) which is used for indicating first indication information and second indication information; the first indication information is first mask information or first scrambling code information, the first mask information is determined by the terminal equipment through downlink control information DCI, the DCI carries a cyclic redundancy check code scrambled through the first mask information, the first scrambling code information is determined by the terminal equipment through downlink control information DCI, the DCI carries information bits scrambled through the first scrambling code information, and the second indication information is used for indicating an index value of SRS resources;

The terminal equipment determines the first antenna port according to the first indication information, the second indication information and a first mapping relation, wherein the first mapping relation is used for representing the corresponding relation among the first indication information, the second indication information and the first antenna port.

Optionally, the format of the DCI is DCI format 0_1.

Specifically, the network device may jointly indicate, through the first indication information and the second indication information, a first antenna port used for transmitting the first signal, where a first mapping relationship exists, where the first mapping relationship is used to indicate a correspondence relationship between the first antenna port and the first indication information and the second indication information.

It should be understood that the first mapping relationship may be agreed by a protocol, or may be configured by a network device through a higher layer signaling, which is not limited by the embodiment of the present application.

As an optional embodiment, the second indication information may be an SRS resource indication field (SRI), when the network device configures more than 1 SRS resource (each SRS resource configuration information includes an SRS resource ID number), the terminal device sends an SRS on the SRS resource based on the configuration information of the SRS, each SRS selects a corresponding sending manner according to the configuration information (used port, occupied time-frequency resource, etc.), and the network device receives and measures multiple SRS. When the DCI format 0_1 indicates that PUSCH transmission is scheduled, the network device instructs the terminal device to select one from the configured plurality of SRS resources through the SRI in the DCI, and the transmission mode adopted by the terminal device to transmit the PUSCH may refer to the transmission mode of the SRS transmitted on the SRS resource indicated by the SRI.

The present application will be described in detail with reference to specific examples.

Example 1

Step 1, the network device configures a DCI format in a specific search space of the terminal device to be format 0_0 through higher layer signaling RRC.

Step 2, the network device sends DCI (corresponding to the first downlink control information) for scheduling PUSCH transmission on a time-frequency resource corresponding to the specific search space of the terminal device. The status bit information (corresponding to the first indication information) of the CRC mask (corresponding to the first mask) of the DCI may indicate port information used for PUSCH single-port transmission, where the port information may include antenna ports, precoding matrix information, spatial filtering information, and the like.

Specifically, the state bit 0 of the CRC mask indicates a transmission mode adopted by the terminal device for transmitting port information used by the PUSCH at this time with reference to a last signal transmitted by the terminal device; the status bit 1 of the CRC mask indicates that the terminal device sends the port information used by the PUSCH at this time without reference to the transmission mode adopted by the last signal, that is, the terminal device sends the port information used by the PUSCH at this time and the transmission mode adopted by the last signal are different.

The signal may be PUSCH, PUCCH or PRACH.

Fig. 3 shows a schematic diagram of a scenario in which the signal is PUSCH. When the signal is PUSCH, a state bit of 0 of the CRC mask indicates that the previous PUSCH transmission mode is referred to, and a state bit of 1 of the CRC mask indicates that the previous PUSCH transmission mode is not referred to, at this time, the terminal device may determine the current PUSCH transmission mode, i.e. port information, by itself, or may determine the current PUSCH transmission mode according to the rules agreed by the protocol, which is not limited by the embodiment of the present application. Fig. 3 illustrates an example of port index only, where when the status bit is 0, the port index of PUSCH is 1, which is the same as the port index of the previous PUSCH, and when the status bit is 1, the port index of PUSCH is 0, which is different from the port index of the previous PUSCH.

It should be understood that, by indicating whether the PUSCH transmission switches ports, the network device may ensure that when the channel condition is worse or when uplink interference control is considered, the terminal device is notified of a port used for transmitting the PUSCH before switching, so that performance of PUSCH transmission may be improved, and the indication information does not increase the cost of DCI.

It should also be appreciated that PRACH or PUCCH transmissions typically employ a relatively robust manner, and PUSCH reference PRACH or PUCCH transmissions may effectively improve the reliability of PUSCH transmissions. Meanwhile, the frequency domain resources occupied by the PRACH/PUCCH are limited, the corresponding sending mode is better on the frequency domain resources with similar frequency domain resources for PUSCH scheduling, and is not optimal on the frequency domain resources with irrelevant frequency domain resources for PUSCH scheduling; therefore, the transmission mode of the PRACH/PUCCH may not be a preferred scheme for PUSCH transmission, and the terminal part can be flexibly configured through the network equipment, so that the flexibility of PUSCH transmission is greatly improved.

In the embodiment of the present application, the status bit information may be the last bit of the CRC mask, which is 0 or 1, as shown in the following table one.

List one

Port information	CRC mask
		Refer to the last time	<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>
Not referring to the last time	<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>

It should be understood that other 1-bit or multi-bit information may be used as the status bit information, for example, the 16 bits of the CRC mask are all 0, or all 1, or <0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1>, which is not limited by the embodiment of the present application.

In case of a status bit 1 of the CRC mask, the terminal device may further determine port information used for currently transmitting PUSCH according to a predefined rule, so that the terminal device and the network device are aligned. The network device determines that MCS used for PUSCH transmission and time-frequency resource allocation is calculated based on a specific port and a precoding matrix used for PUSCH transmission, and if a terminal device is not specified to switch ports to a specific port, the MCS used for PUSCH transmission indicated by the network device may not match with a port actually used for PUSCH transmission by the terminal device, which may cause a loss of PUSCH performance. The predefined rule may include the following:

(1) For a scenario in which the terminal device has 4 receiving antennas but only 1 transmitting antenna, or a scenario in which the terminal device has 4 antennas, and the 4 antennas can be used for data reception but cannot be used for data transmission simultaneously, it may be predetermined that when the network device indicates the state bit 1 of the CRC mask, the switching criterion of the physical port used by the terminal device to transmit the PUSCH at this time is:

determining a switching sequence according to the sequence of index values of physical ports of the terminal equipment, namely if the index value of the physical port adopted by the PUSCH at the last time sent by the terminal equipment is 1, the index value of the physical port adopted by the PUSCH at the current time sent by the terminal equipment is 2;

(2) For the scene that reciprocity does not exist in the uplink and downlink channels, the uplink channel and the downlink channel are irrelevant, and at the moment, the terminal equipment cannot acquire the uplink channel through downlink channel measurement, and the network equipment cannot acquire the downlink channel through uplink channel measurement. In this scenario, it may be pre-agreed that when the network device indicates the status bit 1 of the CRC mask, the switching criterion of the physical port used by the terminal device to send this PUSCH is:

switching transmission modes according to a certain determined sequence according to the existing codebook indexes, namely, if the codebook index adopted by the last time the terminal equipment sends the PUSCH is 1, the codebook index adopted by the terminal equipment sends the current PUSCH is 2;

(3) For the scene that reciprocity exists between the uplink channel and the downlink channel, the uplink channel and the downlink channel are completely related (or symmetrical), and at this time, the terminal equipment can acquire the uplink channel through downlink channel measurement, and the network equipment can also acquire the downlink channel through uplink channel measurement. In this scenario, it may be pre-agreed that when the network device indicates the status bit 1 of the CRC mask, the switching criterion of the physical port used by the terminal device to send this PUSCH is:

determining a switching sequence from high to low according to characteristic values obtained by decomposing the characteristic values of the channel by the network equipment and the terminal equipment, wherein the switching sequence can be specifically switching from the characteristic vector corresponding to the high obtained characteristic value to the characteristic vector corresponding to the low obtained characteristic value; or alternatively

Assuming that the network device configures at least one SRS resource for the terminal device, the SRS transmitted on the SRS resource is a precoded SRS, and the SRS transmitted on each SRS resource corresponds to a feature vector, that is, a precoding matrix, then a switching sequence is determined according to the index of the transmitted SRS resource, and if the terminal device transmits that the last PUSCH adopts the precoding matrix corresponding to the SRS resource 1, the terminal device transmits that the PUSCH adopts the precoding matrix corresponding to the SRS resource 2.

(4) Transmission mode adopted by direct reference to last PUCCH

Fig. 4 shows another scenario in which the above signal is PUSCH. When the signal is PUSCH, a state bit of 0 of the CRC mask indicates that the transmission mode of the PUSCH last time is referred to, and a state bit of 1 of the CRC mask indicates that the transmission mode of the PUSCH last time is not referred to, at this time, the terminal device may directly refer to the transmission mode adopted by the PUCCH last time according to the rule agreed by the protocol. It should be understood that fig. 4 is only described by taking the port index as an example, when the status bit is 0, the port index of PUSCH is 1, which is the same as the port index of the last PUSCH, and when the status bit is 1, the port index of PUSCH is 0, which is different from the port index of the last PUSCH, and which is the same as the port index of the last PUCCH.

Example two

Step 2, the network device sends DCI (corresponding to the first downlink control information) for scheduling PUSCH transmission on a time-frequency resource corresponding to the specific search space of the terminal device. The frequency domain resource allocation field (i.e., the above frequency domain resource location indication information) in the DCI format 0_0 indicates that the allocated frequency domain resource is a partial field in 0RB,DCI format 0_0, for example, a TDRA/MCS/RV/NDI field may be used to indicate port information of the current PUSCH transmitted by the terminal device.

Specifically, when the frequency domain resource indicated by the frequency domain resource allocation field is 0RB, which indicates that PUSCH transmission is not triggered currently, the relevant fields that the network device may use to indicate PUSCH transmission may all be used to indicate port information. The terminal device determines whether other fields in the DCI format are used to indicate the above-mentioned port information by interpreting the values of the resource allocation fields.

The network device may instruct to transmit rank information, precoding information, PRG size, etc. of the PUSCH by multiplexing the above fields; for example, when the base station indicates PUSCH resource scheduling through DCI, the time domain resource allocation field/frequency domain resource allocation field is encoded to be all 0, and bits corresponding to MCS and NDI fields are sent according to the indication modes of TPMI and TRI fields, that is, MCS and NDI fields are used as existing TPMI and TRI fields, and at this time, a certain bit of MCS and NDI fields indicates information of a corresponding certain TPMI and TRI.

When the terminal equipment obtains that the bit corresponding to the frequency domain resource allocation field is all 0 through decoding, the terminal equipment interprets the MCS and NDI fields in the fields as fields indicating the TPMI and the TRI, and at the moment, the terminal equipment decodes the bit corresponding to the MCS and the NDI fields to obtain the information of the TPMI and the TRI.

In the embodiment of the present application, the PUSCH transmission scheduled by the predefined DCI format 0_0 is compliant with the indication of the DCI format 0_0 of the last unscheduled frequency domain resource. As shown in fig. 5, a block indicates a time unit, 0_0+ indicated by the network device in the first time unit indicates that the frequency domain resource allocation in DCI format 0_0 indicated this time is 0RB, at this time, other fields in the DCI are used to indicate port 0 used for PUSCH transmission, and 0_0 indicated by the network device in the third time unit indicates that the frequency domain resource allocation in DCI format 0_0 indicated this time is greater than 0RB, at this time, the DCI triggered PUSCH transmission uses port 0, and so on.

In the embodiment of the application, the network device indicates the port information adopted by the subsequent sending of the PUSCH through the special DCI format 0_0, namely the DCI does not schedule the PUSCH, so that the terminal device only needs to blindly detect the DCI with one format, thereby reducing the blind detection complexity of the terminal device.

Example III

The embodiment of the application mainly aims at the scene that the terminal equipment reports that only uplink single-port transmission is supported or the SRS resource port number configured by the network equipment is 1. For example, a scenario in which the terminal device has 4 reception antennas but only 1 transmission antenna, or a scenario in which the terminal device has 4 antennas and the 4 antennas can be used for data reception at the same time but cannot be used for data transmission at the same time (simply referred to as a 1T4R terminal device) may be specifically mentioned. In this scenario, the network device cannot send the port indication of the PUSCH to the terminal device only through the field in DCI format 0_1, and needs to jointly indicate the port information used by the terminal device to transmit the PUSCH by combining the status bit in the CRC mask and the SRI information.

Step 1, the network device configures a DCI format in a specific search space of the terminal device to be format 0_1 through higher layer signaling RRC.

Step 2, the network device sends DCI (corresponding to the first downlink control information) for scheduling PUSCH transmission on a time-frequency resource corresponding to the specific search space of the terminal device. Wherein, the SRI and the CRC mask in the DCI format 0_1 may jointly indicate physical port information used by the terminal device to transmit the PUSCH.

As shown in table two, for a 1T4R terminal device, there are 4 antenna ports in total, where the first to fourth antenna ports in table two are associated with SRS resource indexes for SRS antenna switching, and in the protocol, it may be defined that different antenna ports of the terminal device are used for SRS transmitted on SRS resources for SRS antenna switching.

Watch II

Antenna port	CRC mask and SRI
		First antenna port	<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>+’0’
Second antenna port	<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>+’1’
		Third antenna port	<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>+’0’
Fourth antenna port	<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>+’1’

In the embodiment of the application, through a protocol agreed mode, the terminal equipment can directly determine the antenna port used for sending the PUSCH according to the status bit and the SRI in the CRC mask, and ensure that the network equipment and the terminal equipment understand consistently, thereby improving the reliability of data transmission.

It should be understood that the sequence numbers of the above processes do not mean the order of execution, and the execution order of the processes should be determined by the functions and internal logic of the processes, and should not be construed as limiting the implementation process of the embodiments of the present application.

The data transmission method according to the embodiment of the present application is described in detail above with reference to fig. 1 to 5, and the network device and the terminal device according to the embodiment of the present application will be described in detail below with reference to fig. 6 to 9.

Fig. 6 shows a terminal device 600 provided by an embodiment of the present application, where the terminal device 600 includes:

a receiving unit 610, configured to receive downlink information sent by a base station, where the downlink information is a Cyclic Redundancy Check (CRC) code scrambled by a mask;

a processing unit 620, configured to obtain the mask according to the downlink information, where the mask includes indication information for indicating whether the terminal device uses a port used for transmitting a second signal to transmit a first signal, where the terminal device transmits the second signal before transmitting the first signal; and determining a port for transmitting the first signal according to the indication information; and

and a sending unit 630, configured to send the first signal on the determined port.

According to the terminal equipment, whether the port used by the first signal transmitted currently is the same as the port used by the second signal transmitted previously is indicated to the terminal equipment through the first indication information, so that the terminal equipment determines the port information for transmitting the PUSCH according to the first indication information, and the reliability of data transmission is improved.

Optionally, the port for transmitting the first signal includes one or more of the following information: antenna ports, precoding matrices, and spatial filtering.

Optionally, the first signal is: signals carried on the physical uplink shared channel PUSCH, or signals carried on the physical uplink control channel PUCCH.

Optionally, the second signal is a signal carried on PUSCH, a signal carried on PUCCH, or a random access preamble sequence.

Optionally, the downlink information is a CRC code of Downlink Control Information (DCI) scrambled by the mask.

Optionally, the mask is 16 bits, and the indication information is one or more bits of the mask.

Optionally, when the last bit of the mask has a value of 0, the port for transmitting the first signal and the port for transmitting the second signal are indicated to be the same.

Optionally, when the last bit of the mask has a value of 1, it indicates that the port transmitting the first signal and the port transmitting the second signal are different.

Optionally, the format of the DCI is format 0_0 or format 0_1.

Optionally, the index value of the antenna port of the port transmitting the first signal is X, the index value of the antenna port of the port transmitting the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

Optionally, the index value of the precoding matrix of the port for transmitting the first signal is Z, the index value of the precoding matrix of the port for transmitting the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.

It should be understood that the terminal device 600 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the terminal device 600 may be specifically a terminal device in the foregoing embodiment, and the terminal device 600 may be configured to perform each flow and/or step corresponding to the terminal device in the foregoing method embodiment, which is not described herein for avoiding repetition.

Fig. 7 shows a base station 700 provided by an embodiment of the present application, where the base station 700 includes:

a processing unit 710, configured to scramble a Cyclic Redundancy Check (CRC) code using a mask, where the mask includes indication information for indicating whether a terminal device uses a port used for transmitting a second signal to transmit a first signal, where the second signal and the first signal are both transmitted by the terminal device, and the second signal is transmitted before the first signal; and

and a sending unit 720, configured to send the scrambled CRC code to the terminal device.

According to the network equipment, whether the port used by the first signal transmitted currently is the same as the port used by the second signal transmitted previously is indicated to the terminal equipment through the first indication information, so that the terminal equipment determines the port information for transmitting the PUSCH according to the first indication information, and the reliability of data transmission is improved.

Optionally, the first signal is a signal carried on a physical uplink shared channel PUSCH or a signal carried on a physical uplink control channel PUCCH.

Optionally, the scrambled CRC code is a CRC code of Downlink Control Information (DCI) scrambled with the mask.

Optionally, the format of the DCI is format 0_0 or format 0_1.

Optionally, the index value of the antenna port is X, the index value of the antenna port of the port transmitting the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

Optionally, the index value of the precoding matrix is Z, where the index value of the precoding matrix of the port for transmitting the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.

It should be understood that the base station 700 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the base station 700 may be specifically a network device in the foregoing embodiment, and the base station 700 may be configured to perform each flow and/or step corresponding to the network device in the foregoing method embodiment, which is not described herein for avoiding repetition.

Fig. 8 shows another terminal device 800 provided by an embodiment of the present application. The terminal device 800 includes a processor 810, a transceiver 820, and a memory 830. Wherein the processor 810, the transceiver 820 and the memory 830 are in communication with each other through an internal connection path, the memory 830 is configured to store instructions, and the processor 810 is configured to execute the instructions stored in the memory 830 to control the transceiver 820 to transmit and/or receive signals.

The transceiver 820 is configured to receive downlink information sent by a base station, where the downlink information is a Cyclic Redundancy Check (CRC) code scrambled by a mask; the processor 810 is configured to: obtaining the mask according to the downlink information, wherein the mask comprises indication information for indicating whether the terminal equipment uses a port used for sending a second signal to send the first signal, and the terminal equipment sends the second signal before sending the first signal; and determining a port for transmitting the first signal according to the indication information; the transceiver 820 is also configured to transmit the first signal on the determined port.

It should be understood that the terminal device 800 may be specifically a terminal device in the foregoing embodiment, and may be configured to perform the steps and/or flows corresponding to the terminal device in the foregoing method embodiment. The memory 830 may optionally include read-only memory and random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type. The processor 810 may be configured to execute instructions stored in a memory, and when the processor 810 executes instructions stored in the memory, the processor 810 is configured to perform the steps and/or processes of the method embodiments described above with respect to the terminal device.

Fig. 9 shows another base station 900 provided by an embodiment of the present application. The base station 900 includes a processor 910, a transceiver 920, and a memory 930. Wherein the processor 910, the transceiver 920, and the memory 930 are in communication with each other through an internal connection path, the memory 930 is configured to store instructions, and the processor 910 is configured to execute the instructions stored in the memory 930 to control the transceiver 920 to transmit signals and/or receive signals.

Wherein the processor 910 is configured to scramble a Cyclic Redundancy Check (CRC) code using a mask to obtain a scrambled CRC code, where the mask includes indication information for indicating whether a terminal device uses a port used to transmit a second signal to transmit a first signal, where the second signal and the first signal are both transmitted by the terminal device, and the second signal is transmitted before the first signal; the transceiver 920 is configured to send the scrambled CRC code to the terminal device.

It should be understood that the base station 900 may be specifically configured as the network device in the foregoing embodiment, and may be configured to perform the steps and/or flows corresponding to the network device in the foregoing method embodiment. The memory 930 may optionally include read-only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type. The processor 910 may be configured to execute instructions stored in a memory, and when the processor 910 executes the instructions stored in the memory, the processor 910 is configured to perform the steps and/or flows of the method embodiments described above with respect to the network device.

It should be appreciated that in embodiments of the present application, the processor of the apparatus described above may be a central processing unit (centralprocessing unit, CPU), which may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software elements in the processor for execution. The software elements 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 executes instructions in the memory to perform the steps of the method described above in conjunction with its hardware. To avoid repetition, a detailed description is not provided herein.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: 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.

Those of ordinary skill in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the steps and components of the various embodiments have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those of ordinary skill in the art may implement the described functionality using different approaches for each particular application, but such implementation is not considered to be beyond the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present 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. In addition, 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 elements, or may be an electrical, mechanical, or other form of connection.

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 embodiment of the present application.

In addition, each functional unit in the embodiments 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 integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising 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 method according to 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.

While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A data transmission method, comprising:

the method comprises the steps that a terminal device receives downlink information sent by a base station, wherein the downlink information is a Cyclic Redundancy Check (CRC) code subjected to mask scrambling;

2. The method of claim 1, wherein the port that transmits the first signal comprises one or more of the following information: antenna ports, precoding matrices, and spatial filtering.

3. The method according to claim 1 or 2, wherein the first signal is a signal carried on a physical uplink shared channel, PUSCH, or a signal carried on a physical uplink control channel, PUCCH.

4. The method according to any of claims 1 or 2, wherein the second signal is a signal carried on PUSCH, a signal carried on PUCCH or a random access preamble sequence.

5. The method according to claim 2, characterized in that the downlink information is a CRC code of downlink control information DCI scrambled by the mask.

6. The method of claim 5, wherein the mask is 16 bits and the indication information is one or more bits of the mask.

7. The method of claim 6, wherein the last bit of the mask has a value of 0 indicating that the port transmitting the first signal and the port transmitting the second signal are the same.

8. The method of claim 6, wherein the last bit of the mask has a value of 1 indicating that the port transmitting the first signal and the port transmitting the second signal are different.

9. The method of any one of claims 6-8, wherein the DCI is formatted 0_0 or formatted 0_1.

10. The method of claim 8, wherein the index value of the antenna port is X, the index value of the antenna port of the port transmitting the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

11. The method according to claim 8 or 10, wherein the index value of the precoding matrix is Z, wherein the index value of the precoding matrix of the port transmitting the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.

12. A terminal device, comprising:

a receiving unit, configured to receive downlink information sent by a base station, where the downlink information is a cyclic redundancy check CRC code scrambled by a mask;

a processing unit for: obtaining the mask according to the downlink information, wherein the mask comprises indication information for indicating whether the terminal equipment uses a port used for sending a second signal to send the first signal, and the terminal equipment sends the second signal before sending the first signal; and determining a port for transmitting the first signal according to the indication information; and

and the transmitting unit is used for transmitting the first signal on the determined port.

13. The terminal device of claim 12, wherein the port that transmits the first signal comprises one or more of the following information: antenna ports, precoding matrices, and spatial filtering.

14. The terminal device according to claim 12 or 13, wherein the first signal is a signal carried on a physical uplink shared channel, PUSCH, or a signal carried on a physical uplink control channel, PUCCH.

15. The terminal device according to any of claims 12 or 13, wherein the second signal is a signal carried on PUSCH, a signal carried on PUCCH or a random access preamble sequence.

16. The terminal device according to any of the claims 12 or 13, characterized in that the downlink information is a CRC code scrambled by the mask of downlink control information DCI.

17. The terminal device of claim 16, wherein the mask is 16 bits and the indication information is one or more bits of the mask.

18. The terminal device of claim 17, wherein the last bit of the mask has a value of 0 indicating that the port transmitting the first signal and the port transmitting the second signal are the same.

19. The terminal device of claim 17, wherein the last bit of the mask has a value of 1 indicating that the port transmitting the first signal and the port transmitting the second signal are different.

20. The terminal device of any of claims 17-19, wherein the DCI is formatted as format 0_0 or format 0_1.

21. The terminal device of claim 19, wherein the index value of the antenna port of the port transmitting the first signal is X, the index value of the antenna port of the port transmitting the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

22. The terminal device according to claim 19 or 21, wherein the index value of the precoding matrix of the port transmitting the first signal is Z, the index value of the precoding matrix of the port transmitting the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.

23. A base station, comprising:

a processing unit, configured to scramble a cyclic redundancy check CRC code using a mask to obtain a scrambled CRC code, where the mask includes indication information for indicating whether a terminal device uses a port used for transmitting a second signal to transmit a first signal, where the second signal and the first signal are both transmitted by the terminal device, and the second signal is transmitted before the first signal; and

and the sending unit is used for sending the scrambled CRC code to the terminal equipment.

24. The base station of claim 23, wherein the port transmitting the first signal comprises one or more of the following information: antenna ports, precoding matrices, and spatial filtering.

25. The base station according to claim 23 or 24, wherein the first signal is a signal carried on a physical uplink shared channel, PUSCH, or a signal carried on a physical uplink control channel, PUCCH.

26. The base station according to claim 23 or 24, wherein the second signal is a signal carried on PUSCH, a signal carried on PUCCH or a random access preamble sequence.

27. The base station according to claim 24, wherein the scrambled CRC code is a CRC code scrambled by the mask of downlink control information DCI.

28. The base station of claim 27, wherein the mask is 16 bits and the indication information is one or more bits of the mask.

29. The base station of claim 28, wherein the last bit of the mask has a value of 0 indicating that the port transmitting the first signal and the port transmitting the second signal are the same.

30. The base station of claim 28, wherein the last bit of the mask has a value of 1 indicating that the port transmitting the first signal and the port transmitting the second signal are different.

31. The base station according to any one of claims 28-30, wherein the DCI is formatted as format0_0 or format0_1.

32. The base station of claim 30, wherein the index value of the antenna port is X, the index value of the antenna port of the port transmitting the second signal is x+1 or X-1, and X is a positive integer greater than or equal to 1.

33. The base station according to claim 30 or 32, wherein the index value of the precoding matrix is Z, wherein the index value of the precoding matrix of the port transmitting the second signal is z+1 or Z-1, and Z is a positive integer greater than or equal to 1.