WO2019192530A1 - Procédé de transmission de données, dispositif terminal et dispositif de réseau - Google Patents

Procédé de transmission de données, dispositif terminal et dispositif de réseau Download PDF

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Publication number
WO2019192530A1
WO2019192530A1 PCT/CN2019/081301 CN2019081301W WO2019192530A1 WO 2019192530 A1 WO2019192530 A1 WO 2019192530A1 CN 2019081301 W CN2019081301 W CN 2019081301W WO 2019192530 A1 WO2019192530 A1 WO 2019192530A1
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WIPO (PCT)
Prior art keywords
signal
port
terminal device
information
mask
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PCT/CN2019/081301
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English (en)
Chinese (zh)
Inventor
刘显达
刘鹍鹏
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

Definitions

  • 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.
  • the fifth generation mobile communication technology supports at least two downlink control information (DCI) formats for scheduling a physical uplink shared channel (PUSCH), and different DCI formats are corresponding.
  • DCI downlink control information
  • the content of the fields contained in the DCI and the corresponding DCI have different bit widths.
  • the DCI format 0_0 includes time-frequency resource allocation information, modulation coding strategy (MCS) information, and does not include a sounding reference signal resource indication (SRI), a transmission rank indication.
  • MCS modulation coding strategy
  • SRI sounding reference signal resource indication
  • DCI format 0_1 includes time-frequency resource allocation information, MCS, SRI , TRI and TPMI information, sounding reference signal (SRS) request information (SRS request for dynamically triggering SRS transmission), antenna port indication information, and the like.
  • SRS sounding reference signal
  • the bit widths corresponding to different DCI formats for scheduling PUSCH may be different.
  • the network device may configure at least one terminal device-specific search space by using a high-level signaling radio resource control (RRC), and each search space may correspond to time-frequency resource configuration information, so that the network device performs DCI on the resource. Detection.
  • RRC radio resource control
  • Each search space contains configuration information of the DCI format, and generally only contains one uplink scheduling DCI format, such as DCI format 0_0 or DCI format 0_1.
  • the terminal device determines the DCI format used for scheduling the PUSCH and the corresponding DCI information by blindly detecting different search spaces.
  • the network device configures at least one SRS resource for the terminal device by using the RRC signaling, and the terminal device sends the SRS on the SRS resource according to the configuration information of the received SRS resource; the network device receives and measures the SRS on the SRS resource, and
  • the resource scheduling information (including time-frequency resource allocation, transmission mode, and the like) of the terminal device is determined based on an implementation algorithm of the network device, and SRI, TRI, TPMI, MCS, and DMRS port information are indicated by DCI format 0_1.
  • the network device will use DCI format 0_0 to transmit the PDCCH scheduling PUSCH transmission.
  • the PUSCH transmission scheduled in the protocol adopts a single-port transmission mode.
  • the so-called single-port transmission mode is that the PUSCH and the DMRS corresponding to the PUSCH use a single port, and the number of transmission layers used for transmitting the PUSCH is 1.
  • DCI format 0_0 is a reduced DCI format compared to format 0_1, which does not include SRI, TRI, TPMI information, and antenna port indication information of DMRS.
  • the terminal device cannot pass the above information.
  • the terminal device may determine the physical port, the precoding vector, or the spatial filtering (referred to herein as port information) of the PUSCH based on the algorithm implemented by itself or in a predefined manner, so that the network device cannot directly pass the DCI to the terminal device. Indicates the port information used to transmit the PUSCH, and the reliability of data transmission is poor.
  • the present application provides a data transmission method, a terminal device, and a network device, which can indicate the port information of the PUSCH to the terminal device, which is beneficial to improving the reliability of data transmission.
  • a first aspect provides a data transmission method, including: receiving, by a terminal device, downlink information sent by a base station, where the downlink information is a cyclic redundancy check (CRC) code after mask scrambling;
  • CRC cyclic redundancy check
  • the mask Determining, by the terminal, the mask according to the downlink information, where the mask includes indication information for indicating whether the terminal device sends a first signal by using a port used by sending a second signal, where the terminal The device transmits the second signal before transmitting the first signal;
  • the terminal device determines, according to the indication information, a port that sends the first signal, and sends the first signal on the determined port.
  • the first indication information indicates whether the port used by the first signal currently sent by the terminal device is the same as the port used by the previously transmitted second signal, so that the terminal device determines according to the first indication information.
  • Sending the port information of the PUSCH is beneficial to improving the reliability of data transmission.
  • the port for transmitting the first signal comprises one or more of the following: an antenna port, a precoding matrix, and spatial filtering.
  • 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.
  • the second signal is a signal carried on a PUSCH, a signal carried on a PUCCH, or a random access preamble sequence.
  • the downlink information is a CRC code of the downlink control information (DCI) that is scrambled by the mask.
  • the mask is 16 bits and the indication information is one or more bits of the mask.
  • the last bit of the mask when the last bit of the mask takes a value of 0, indicating that the port transmitting the first signal is the same as the port transmitting the second signal.
  • the last bit of the mask takes a value of 1, indicating that the port transmitting the first signal is different from the port transmitting the second signal.
  • the format of the DCI is format 0_0 or format 0_1.
  • the index value of the antenna port is X
  • an antenna port index of the port that sends the second signal is X+1 or X-1, where X is A positive integer greater than or equal to 1.
  • the index value of the precoding matrix is Z
  • an index value of a precoding matrix of a port that sends the second signal is Z+1 or Z.
  • Z is a positive integer greater than or equal to 1.
  • the frequency domain resource occupied by the second signal is the same as the frequency domain resource occupied by the first signal, or the second signal
  • the portion of the frequency domain resource that overlaps with the frequency domain resource occupied by the first signal is greater than a certain value.
  • the mask is configured to indicate whether a port of the first signal is the same as a mask of port information that was last used for indication.
  • another data transmission method including: receiving, by a terminal device, downlink control information DCI, where the DCI is used to indicate first indication information and second indication information; wherein the first indication information For the first mask information or the first scrambling code information, the first mask information is determined by the terminal device by using downlink control information DCI, and the DCI carries a cyclic redundancy of scrambling by using the first mask information. And the first scrambling code information is determined by the terminal device by using downlink control information DCI, where the DCI carries information bits scrambled by the first scrambling code information, and the second indication information is used by the second indicator information.
  • An index value indicating the SRS resource is received from a terminal device, downlink control information DCI, where the DCI is used to indicate first indication information and second indication information;
  • the terminal device Determining, by the terminal device, the first antenna port according to the first indication information, the second indication information, and the first mapping relationship, where the first mapping relationship is used to indicate the first indication information, the Corresponding relationship between the second indication information and an antenna port of the terminal device.
  • the format of the DCI is DCI format 0_1.
  • another data transmission method comprising: a base station scrambling a cyclic redundancy check (CRC) code using a mask to obtain a scrambled CRC code, wherein the mask is included for Instructing the terminal device whether to use the port used to send the second signal to send the indication information of the first signal, where the second signal and the first signal are sent by the terminal device, and the second signal is The first signal is sent before; the base station sends the scrambled CRC code to the terminal device.
  • CRC cyclic redundancy check
  • the port for transmitting the first signal includes one or more of the following: an antenna port, a precoding matrix, and spatial filtering.
  • 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.
  • the second signal is a signal carried on a PUSCH, a signal carried on a PUCCH, or a random access preamble sequence.
  • the scrambled CRC code is a CRC code of the downlink control information (DCI) that is scrambled by the mask.
  • DCI downlink control information
  • the mask is 16 bits and the indication information is one or more bits of the mask.
  • the port indicating that the first signal is sent is the same as the port that sends the second signal.
  • the port indicating that the first signal is sent is different from the port that sends the second signal.
  • the format of the DCI is format 0_0 or format 0_1.
  • the index value of the antenna port is X
  • the index of the antenna port of the port that sends the second signal is X+1 or X-1, where X is A positive integer greater than or equal to 1.
  • the index value of the precoding matrix is Z
  • an index value of a precoding matrix of a port that sends the second signal is Z+1 or Z.
  • Z is a positive integer greater than or equal to 1.
  • 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 to indicate the
  • 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.
  • the frequency domain resource occupied by the second signal is the same as the frequency domain resource occupied by the first signal, or the second signal The portion of the frequency domain resource that overlaps with the frequency domain resource occupied by the first signal is greater than a certain value.
  • the mask is configured to indicate whether a port of the first signal is the same as a mask of port information that was last used for indication.
  • a terminal device for performing the method of the first aspect or any possible implementation of the first aspect.
  • the terminal device comprises means for performing the method of any of the above-mentioned first aspect or any of the possible implementations of the first aspect.
  • the network device comprises means for performing the method of any of the possible implementations of the second aspect or the second aspect described above.
  • another terminal device comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • another base station comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • a data transmission system comprising the terminal device in any one of the possible implementation manners of the third aspect or the third aspect, and any possible implementation manner of the fourth aspect or the fourth aspect Base station in; or
  • the system includes the terminal device in any one of the possible implementation manners of the fifth aspect or the fifth aspect, and the base station in any one of the sixth aspect or the sixth aspect.
  • a computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the first aspect or the first aspect described above Possible methods in the implementation.
  • a computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the second aspect or the second aspect Possible methods in the implementation.
  • a tenth aspect a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a computer readable medium for storing a computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • FIG. 1 shows a schematic diagram of a communication system of an embodiment of the present application.
  • FIG. 2 shows a schematic flow chart of a data transmission method according to an embodiment of the present application.
  • FIG. 3 shows a schematic diagram of a scene according to an embodiment of the present application.
  • FIG. 4 shows another schematic diagram of a scenario according to an embodiment of the present application.
  • FIG. 5 shows another schematic diagram 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 present application.
  • FIG. 7 shows a schematic block diagram of a base station according to an embodiment of the present application.
  • FIG. 8 shows a schematic block diagram of another terminal device according to an embodiment of the present application.
  • FIG. 9 shows a schematic block diagram of another base station according to an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA Wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • SCMA sparse code multiple access
  • SCMA sparse code multiple access
  • OFDM Orthogonal frequency division multiplexing
  • FBMC filter bank multi-carrier
  • GFDM generalized frequency division multiplexing
  • filtered-OFDM, F-OFDM filtered-OFDM, F-OFDM
  • the terminal device may communicate with one or more core networks via a radio access network (RAN), and the terminal device may be referred to as an access terminal and a user equipment (user Equipment, UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • PLMN public land mobile network
  • the network device may be used to communicate with the terminal device, where the network device may be a base transceiver station (BTS) in a GSM system or a CDMA system, or may be a base station in a WCDMA system ( Node B, NB), may also be an evolved base station (evolutional node B, eNB or eNode B) in the LTE system, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a future 5G network.
  • BTS base transceiver station
  • Node B, NB Node B
  • eNB evolved base station
  • the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a future 5G network.
  • Network side device or network device in a future evolved PLMN network may be used to communicate with the terminal device, where the network device may be a base transceiver station (BTS) in a GSM system
  • the embodiments of the present application can be applied to an LTE system and a subsequent evolved system, such as 5G, or other wireless communication systems using various radio access technologies, such as using code division multiple access, frequency division multiple access, time division multiple access, and orthogonal.
  • a system of access frequency division multiple access, single carrier frequency division multiple access, etc. is particularly suitable for scenarios requiring channel information feedback and/or applying secondary precoding techniques, such as a wireless network using Massive MIMO technology, and a distributed antenna for application.
  • MIMO multiple-input multiple-output
  • Antenna transmission and reception improve communication quality. It can make full use of space resources and achieve multiple transmission and reception through multiple antennas. It can multiply the system channel capacity without increasing spectrum resources and antenna transmission power.
  • MIMO can be divided into single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO).
  • SU-MIMO single-user MIMO
  • MU-MIMO multi-user MIMO
  • Massive MIMO arranges hundreds of antennas at the transmitting end, modulates the respective beams for dozens of target receivers, and transmits dozens of signals simultaneously on the same frequency resource through spatial signal isolation. Therefore, Massive MIMO technology can make full use of the spatial freedom brought by large-scale antenna configuration to improve spectrum efficiency.
  • the communication system 100 includes a network device 102, which may include multiple antenna groups.
  • Each antenna group may include one or more antennas, for example, 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.
  • Two antennas are shown in Figure 1 for each antenna group, although more or fewer antennas may be used for each group.
  • Network device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include various components related to signal transmission and reception, such as processors, modulators, multiplexers, solutions. Tuner, demultiplexer or antenna.
  • Network device 102 can communicate with a plurality of terminal devices, for example, network device 102 can communicate with terminal device 116 and terminal device 122. However, it will be appreciated that network device 102 can communicate with any number of terminal devices similar to terminal device 116 or 122.
  • Terminal devices 116 and 122 may be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communicating over wireless communication system 100. device.
  • terminal device 116 is in communication with antennas 112 and 114, wherein 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.
  • terminal device 122 is in communication with antennas 104 and 106, wherein 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.
  • forward link 118 may utilize a different frequency band than reverse link 120
  • forward link 124 may utilize a different frequency band than reverse link 126.
  • the forward link 118 and the reverse link 120 can use a common frequency band, and the forward link 124 and the reverse link 126 can be used in common. frequency band.
  • Each set of antennas and/or regions designed for communication is referred to as a sector of network device 102.
  • the antenna group can be designed to communicate with terminal devices in sectors of the network device 102 coverage area.
  • the transmit antenna of network device 102 may utilize beamforming to improve the signal to noise ratio of forward links 118 and 124.
  • the network device 102 uses beamforming to transmit signals to the randomly dispersed terminal devices 116 and 122 in the relevant coverage area, the network device 102 uses a single antenna to transmit signals to all of its terminal devices. Mobile devices are subject to less interference.
  • network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting device and/or a wireless communication receiving device.
  • the wireless communication transmitting device can encode the data for transmission.
  • the wireless communication transmitting device may acquire a certain number of data bits to be transmitted to the wireless communication receiving device through a channel, for example, the wireless communication transmitting device may generate, receive from another communication device, or save in a memory, etc., to be transmitted through a channel.
  • a certain number of data bits to the wireless communication receiving device may be included in a transport block or a plurality of transport blocks of data, and the transport blocks may be segmented to produce a plurality of code blocks.
  • 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 (M2M) network or other network, and FIG. 1 is merely an example for convenience of understanding.
  • PLMN public land mobile network
  • D2D device to device
  • M2M machine to machine
  • FIG. 1 is merely an example for convenience of understanding.
  • a simplified schematic diagram of the network may also include other network devices, which are not shown in FIG.
  • the downlink resources of the system are divided into multiple orthogonal frequency divisions in terms of time.
  • the Orthogonal Frequency Division Multiple (OFDM) symbol is divided into several subcarriers in terms of frequency.
  • the Physical Downlink Control Channel (PDCCH) in the downlink usually occupies the first two or three OFDM symbols in one subframe.
  • the PDCCH is used to carry Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the DCI carries terminal device specific resource allocation and other control information specific to the terminal device or shared by the cell.
  • the physical uplink shared channel (PUSCH) in the uplink of the system is used to carry uplink transmission data, and is usually generated by using discrete Fourier transform extended OFDM (DFT-Spread OFDM, DFT-S-OFDM). Frequency domain signal. In general, one slot typically includes 14 OFDM symbols.
  • the size of a physical resource block (PRB) is also defined in the system. One PRB includes 12 subcarriers in the frequency domain, and a certain subcarrier in a certain OFDM symbol is called a Resource Element (RE).
  • PRB physical resource block
  • the Sounding Reference Signal is mainly used by the network device to determine the uplink channel quality, thereby performing uplink frequency selective scheduling.
  • the time-frequency resource location occupied by the SRS and the related SRS transmission mode of the terminal device needs to be configured according to the configuration information of the SRS resource indicated by the network device through the RRC signaling or further according to the Medium Access Control-Control Element (MAC-CE).
  • the signaling is further determined based on DCI signaling.
  • the configuration information of each SRS resource includes at least an index number of the SRS resource, time-frequency location information occupied by the SRS resource, and a transmission port number corresponding to the SRS resource.
  • the uplink transmission mode includes a codebook-based uplink transmission mode.
  • a common method is to configure the SRS resource information by using the RRC signaling after the terminal device is in the RRC connection state, and the terminal device After successfully receiving the RRC configuration information, the SRS signal is sent on the corresponding uplink time-frequency resource according to the configuration parameter of the SRS, and the network device receives and measures the SRS to obtain the uplink channel information on the corresponding SRS time-frequency resource.
  • the network device determines, by its own implementation algorithm, a time-frequency resource used by the terminal device to transmit the PUSCH and a transmission scheme, and the network device indicates the information to the terminal device by using DCI signaling carried in the PDCCH for scheduling the uplink.
  • the transmission scheme includes at least spatial filtering information, a Rank Indicator (TRI), a Transmission Precoding Matrix Indicator (TPMI), and a Modulation and Coding Scheme (MCS) used by the terminal device to transmit the PUSCH. ), antenna port indication information, etc.
  • TRI Rank Indicator
  • TPMI Transmission Precoding Matrix Indicator
  • MCS Modulation and Coding Scheme
  • the terminal device After receiving the DCI for scheduling PUSCH transmission, the terminal device performs PUSCH transmission according to the time-frequency resource indicated in the DCI and the transmission scheme.
  • the role of the TPMI is to indicate phase weighting between transmitting 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 transmitting antenna used by the terminal device to transmit the SRS.
  • the phase weighting method between the transmitting antennas used by the terminal device to transmit the PUSCH refers to the SRS, which includes the indication result of the TPMI.
  • 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 to complete the demodulation of the PUSCH.
  • the antenna port information included in the above transmission scheme is the port number used for transmitting the DMRS.
  • the network device allocates different DMRS ports for different terminal devices to distinguish MU-MIMO transmission. Data information sent by multiple terminal devices.
  • the DMRS in the NR and the PUSCH corresponding thereto are transmitted using the same port number, which means that the DMRS and the corresponding PUSCH adopt the same transmission mode.
  • the NR supports high frequency bands with a larger available bandwidth, especially the millimeter wave band. However, the high frequency band will result in greater path loss.
  • the beamformed signals may include a broadcast channel, a data channel, a control channel, a synchronization signal, and a cell-specific reference signal. For scenarios where a beamformed signal is required, beam training is required for the determination of the optimal transmit and receive beam.
  • the network device may indicate the result of the beam training to the terminal device by signaling (including RRC, MAC-CE, and DCI) to notify the terminal device to transmit and receive various reference signals and beams used by the channel.
  • signaling including RRC, MAC-CE, and DCI
  • the beam used by the terminal device to transmit information is referred to as spatial filtering information.
  • the spatial filtering information is used to associate the target resource with a certain reference signal.
  • the terminal device sends the SRS resource using the same spatial transmission filtering as the spatial domain transmission filter used by the SSB/PBCH; when the associated reference signal is CSI-RS The terminal device sends the SRS resource using the same spatial transmission filter as the spatial domain transmission filter used by the CSI-RS.
  • the terminal device sends the SRS resource to use and send.
  • the spatial transmission filter used by the associated SRS uses the same spatial transmission filtering. It should be understood that the spatial filtering information of the channel A reference channel B indicates that the transmission beam used by the transmission channel A is the same as the transmission beam used by the transmission channel B.
  • At least two DCI formats for scheduling the PUSCH are supported in the NR, and the field content included in the DCI corresponding to different DCI formats and the corresponding DCI bit width are different.
  • DCI format 0_1 which includes time-frequency resource allocation information, MCS, SRI, TRI, TPMI information, SRS request information (SRS request for dynamically triggering SRS transmission), and antenna port indication information.
  • DCI format 0_0 may include the following fields:
  • Frequency domain resource location indication information used to indicate frequency domain resources allocated for PUSCH
  • Time domain resource location indication information used to indicate time domain resources allocated for PUSCH
  • Modulation coding scheme used to indicate information such as modulation order and target code rate of the data block
  • SRS resource indication when the network device configures multiple SRS resources by using high layer signaling, the signaling is used to indicate that one or more SRS resources are selected from multiple SRS resources.
  • Precoding information and number of transmission layers a number of transmission layers used to indicate PUSCH transmission and a corresponding precoding matrix
  • Antenna port used to indicate the port number and number of ports of the DMRS associated with the PUSCH
  • CBG Code Block Group
  • the network device configures at least one SRS resource for the terminal device by using the RRC signaling, and the terminal device sends the SRS on the SRS resource according to the configuration information of the received SRS resource; the network device receives and measures the SRS on the SRS resource, and
  • the resource scheduling information (including time-frequency resource allocation, transmission mode, and the like) of the terminal device is determined based on an implementation algorithm of the network device, and SRI, TRI, TPMI, MCS, and DMRS port information are indicated by DCI format 0_1.
  • DCI format 0_0 contains time-frequency resource allocation information, MCS information, and does not include SRI, TRI, TPMI information, antenna port indication information, and so on.
  • DCI format 0_0 may include the following fields:
  • the network device will use DCI format 0_0 to transmit the PDCCH scheduling PUSCH transmission.
  • the network device does not use the high-layer signaling to configure the transmission mode, which is mainly the time period from the initial access until the RRC configuration is completed and takes effect; because the terminal device cannot receive any RRC signaling indication during this period of time.
  • Configuration information so the protocol needs to pre-define a transmission mechanism, that is, PUSCH single-port transmission based on DCI format 0_0 scheduling, mainly because the transmission mechanism does not depend on RRC signaling, and indicates necessary PUSCH transmission through DCI signaling.
  • the parameters can complete the transmission of the PUSCH;
  • the terminal device for the cell edge uses format 0_0 to schedule the PUSCH. Since the terminal equipment at the edge of the cell mainly needs to solve the coverage problem, the use of the simplified DCI format can effectively improve the coverage. It is reasonable to use the DCI format 0_0 to schedule the data.
  • the bit widths corresponding to different DCI formats for scheduling PUSCH may be different.
  • the network device configures at least one terminal device-specific search space through the high-layer signaling RRC, and each search space corresponds to the time-frequency resource configuration information, so that the terminal device performs DCI detection on the resource.
  • Each search space contains configuration information of the DCI format, and generally only contains one uplink scheduling DCI format, such as DCI format 0_0 or DCI format 0_1.
  • the terminal device can determine the DCI format used for scheduling the PUSCH and the corresponding DCI information by blindly detecting different search spaces.
  • the terminal device may determine the physical port, precoding information or spatial filtering (referred to herein as port information) for transmitting the PUSCH based on its own implementation algorithm or by a predefined manner, which may result in The network device cannot directly indicate the port information used by the PUSCH to the terminal device through the DCI, and the reliability of the data transmission is poor.
  • port information precoding information or spatial filtering
  • a port includes at least an antenna port (also referred to as a physical port), precoding information, or spatial filtering information, and the ports mentioned herein are all logical ports.
  • the antenna port refers to the antenna port of the terminal device, and the precoding information includes RI and TPMI for indicating the precoding matrix.
  • FIG. 2 shows a schematic flowchart of a data transmission method 200 in the embodiment of the present application.
  • the method 200 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the network device sends the downlink information that is scrambled by the first indication information, where the first indication information is used to indicate the first port used by the user terminal to send the first signal, and the second signal is sent. Whether the second port used is the same, the second signal is sent by the terminal device at the time of NK transmission, N and K are both positive integers, and N is greater than K; correspondingly, the terminal device receives the downlink information, And acquiring, according to the downlink information, the first indication information;
  • the terminal device sends the first signal according to the first indication information; and correspondingly, the network device receives the first signal. Specifically, the terminal device determines, according to the first indication information, a first port that sends the first signal, and sends the first signal to the network device on the first port.
  • the first port includes at least one of the following: a first antenna port used to transmit the first signal, a first precoding matrix used to transmit the first signal, and a first signal to be transmitted First spatial filtering used;
  • the second port includes at least one of the following: a second antenna port used to transmit the second signal, a second precoding matrix used to transmit the second signal, and a second signal to be transmitted The second spatial filtering used.
  • the network device may indicate, by using the first indication information, whether the first port used by the first signal to be sent by the terminal device is the same as the second port used by the second signal sent by the NK sending time, and the terminal device is configured according to the second port.
  • the first indication information determines whether to refer to the second port used by the second signal. It should be understood that the meaning of reference herein is to directly determine that the first port is the same as the second port, and the terminal device may refer to the antenna port, precoding matrix or spatial filtering information, and the like.
  • the terminal device may directly send the first signal by using the second port, where the first indication information indicates that the first port is different from the second port.
  • the terminal device may randomly select a port to send the first signal, and may also send the first signal according to a predefined rule, which is not limited in this embodiment of the present application.
  • the first indication information indicates whether the port used by the first signal currently sent by the terminal device is the same as the port used by the previously transmitted second signal, so that the terminal device determines according to the first indication information.
  • Sending the port information of the PUSCH is beneficial to improving the reliability of data transmission.
  • 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.
  • the foregoing first signal may be a signal that is carried on the PUSCH, or may be a signal that is carried on the PUCCH, which is not limited in this embodiment of the present application.
  • the transmission time is a relative concept, representing the time at which the terminal device transmits a signal, for example, the first signal is transmitted at the second transmission time, and the second signal is transmitted at the first transmission time, the second transmission.
  • the time may be the fifth time unit, and the first sending time may be the third time unit, which is not limited by the embodiment of the present application, depending on the scheduling of the network device.
  • the terminal device may further transmit the first DMRS at the Nth transmission time by referring to the transmission manner of the second DMRS transmitted when the second signal is transmitted at the N-K transmission time.
  • the corresponding DMRS needs to be simultaneously used for the base station to estimate the channel information of the PUSCH or the PUCCH to successfully demodulate the PUSCH or the PUCCH, and the corresponding DMRS refers to the port of the DMRS and the port of the PUSCH or the PUCCH.
  • the first DMRS can also determine its port information according to the same mechanism as the PUSCH or PUCCH.
  • the second signal is any one of the following signals: a signal carried on a PUSCH, a signal carried on a PUCCH, a signal carried on a physical downlink control channel PDCCH, and random access. Lead sequence.
  • the foregoing second signal may be a signal that is carried on the PUSCH, and may be a signal that is carried on the PUCCH, or a signal that is carried on the PDCCH, or may be a random access preamble sequence. Not limited.
  • the terminal device transmits the PUCCH reference to the latest PUSCH. Since the port information used for transmitting the PUCCH is determined based on the implementation algorithm of the terminal device itself, for example, the PUCCH is fixedly transmitted by using a certain port, and its transmission port may not be most preferable due to the time-varying characteristics of the channel. At this time, since the port used for transmitting the PUSCH is based on the network device, the performance of transmitting data through the port may be better than the port of the PUCCH, and the transmission of the current PUCCH may refer to the PUSCH transmission.
  • the terminal device Since the terminal device always performs port adjustment of the first signal based on the last transmitted signal, this can improve the port adjustment efficiency and thereby improve the throughput of the system.
  • the first indication information is first mask information or first scrambling code information
  • the first mask information is used for cyclic redundancy check of downlink control information (DCI) (
  • DCI downlink control information
  • the CRC CRC
  • the first scrambling code information is used to scramble information bits in the downlink control information.
  • the control information bit that needs to be transmitted is encoded, and the control information bit after the encoding may generate a CRC code of the control information bit by using a check code generation polynomial, and send a CRC check.
  • the control information bit of the bit that is, the CRC code of the control information bit
  • the CRC code can be modulo 2 divided by the same generator polynomial, if the remainder is 0. , means that the terminal device correctly decodes the downlink information.
  • the correspondence between the different first masks and the port hypothesis information used by the different first signal transmissions may be defined in advance, or the base station includes different first masks and different firsts in the RRC signaling configuration through the high layer signaling.
  • the correspondence between the port hypothesis information used for signal transmission, and the port hypothesis information may be a port that references the second signal or a port that does not refer to the second signal.
  • the network device may perform a method of scrambling the CRC code by using different first masks according to different first masks and different port hypothesis information used by the first signal transmission.
  • a masked scrambled CRC code carries additional indication information.
  • the network device and the terminal device are known to have at least two first masks, and each of the first masks corresponds to one port indication information, where the port indication information includes a terminal device antenna port, a precoding matrix, etc., and the base station is based on The correspondence may select a first mask from the at least two first masks to scramble the CRC code, so that the base station transmits different port indication information by different first mask scrambling.
  • the terminal device learns, according to the correspondence between the different first masks of the pre-defined or RRC configurations and the port hypothesis information used by the different first signal transmissions, from the received CRC codes, that the base station adopts the at least two A certain first mask in a mask, thereby determining, according to the first indication information, a first port used for transmitting the first PUSCH.
  • the first indication information may also be the first scrambling code information.
  • the information bit needs to be scrambled by using the specific first scrambling code information.
  • the correspondence between the different first scrambling codes and the port hypothesis information used by the different first signal transmissions may be predefined, or the base station includes the first scrambling code with different RRC signaling configurations and different firsts through the high layer signaling.
  • the correspondence between the port hypothesis information used for signal transmission, and the port hypothesis information may be a port that references the second signal or a port that does not refer to the second signal.
  • the network device may perform scrambling on the CRC code by using different first scrambling codes based on the correspondence between the different first scrambling codes and the port hypothesis information used by the different first signal transmissions, so that after the first scrambling code is scrambled
  • the control information bits carry additional indication information.
  • the network device and the terminal device are known to have at least two first scrambling codes, and each of the first scrambling codes corresponds to one port indication information, and the base station may use the at least two first scrambling codes based on the correspondence.
  • the first scrambling code is selected to scramble the control information bits, so that the base station transmits different port indication information by different first scrambling codes.
  • the terminal device learns, according to the correspondence between different pre-defined or RRC-configured different first scrambling codes and different port hypothesis information used by the first signal transmission, from the received CRC code, that the base station adopts the at least two A first scrambling code of a scrambling code, thereby determining, according to the first indication information, a first port used for transmitting the first PUSCH.
  • the foregoing first downlink control information may specifically be RRC signaling and DCI, that is, the network device indicates, by using RRC signaling, different bits in the first indication information to transmit specific information, and then indicates a certain bit through the DCI. Thereby, the terminal device is notified of the specific information corresponding to the bit, and the terminal device can finally obtain the specific information indicated by the base station based on the RRC signaling and the DCI.
  • the first mask information includes 16 bits, and one or more of the 16 bits are used to indicate whether the terminal device sends by using the second port. The first signal.
  • the first indication information may be a bit of the first mask information or the first scrambling code information, where all the bits are 0, indicating that the first port is the same as the second port, and all the bits are taken as 1
  • the first port is different from the second port, or the first bit is the same as the second port. If the bit is 0, the first port is different from the second port, but the first port is different from the second port. The application embodiment does not limit this.
  • 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 to indicate that the third port is the same as the third port used by the third signal sent by the NL sending moment, and L is a positive integer, L Less than N and greater than K;
  • the third port includes at least one of the following information:
  • a third antenna port used to transmit the third signal
  • a third precoding matrix used to transmit the third signal
  • a third spatial filter used to transmit the third signal
  • 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 sent by the NK sending time, or the third signal sent by the first port and the NL sending time.
  • the corresponding third port is the same.
  • the network device and the terminal device pre-approve L different first mask information or L different first scrambling code information, respectively, indicating that the terminal device transmits the PUSCH port and the PUSCH transmitted at the Nn 1 time at the Nth time.
  • the port is the same, and the port used by the terminal device to transmit the PUSCH at the Nth time is the same as the port used by the PUSCH transmitted at the Nn 2nd time, ..., the terminal device transmits the PUSCH port and the PUSCH transmitted at the Nn L time at the Nth time.
  • Ports are the same, where n 1 , n 2 , ..., n L are positive integers less than N; or
  • the base station configures L different first mask information or L different first scrambling code information through RRC signaling to indicate that the port used by the terminal device to transmit the PUSCH at the Nth time is the same as the port used by the PUSCH transmitted at the Nn 1 time.
  • the port used by the terminal device to transmit the PUSCH at the Nth time is the same as the port used by the PUSCH transmitted at the Nn 2nd time, ..., the port used by the terminal device to transmit the PUSCH at the Nth time is the same as the port used by the PUSCH transmitted at the Nn L time.
  • n 1 , n 2 , . . . , n L are all positive integers less than N.
  • the base station When scheduling the PUSCH sent by the Nth time, the base station selects one of the L different first mask information or the L different first scrambling code information to scramble the DCI, and then indicates to the terminal device, where the terminal device receives the DCI. And determining, by using a decoding algorithm, the mask information used by the DCI is one of L different first mask information or L different first scrambling code information, so that the first mask information and port indication pre-agreed by the base station are used.
  • Corresponding relationship of the information, or the port information indicated by the base station is determined based on the correspondence between the first mask information and the port indication information that the base station configures through the RRC signaling, that is, the port used is the same as the port used by the PUSCH sent at the time of the Nn Kth , Where K is greater than or equal to 1 and less than or equal to L integers.
  • the first indication information is a first field in a DCI, where the first field is used to indicate the first port;
  • the first indication information is a second field in the DCI, and the second field is used to indicate a modulation and coding policy MCS used by the first signal, where the first port is determined according to the MCS. .
  • the network device may send the DCI to the terminal device, and use the first field or the second field in the DCI as the first indication information.
  • the first field is used to indicate the first port
  • the second field is used to indicate the MCS. Therefore, after the terminal device receives the DCI, if the first field is the first indication information, the terminal device may directly Determining, according to the first field in the DCI, a first port used for sending the first signal, where the second field is the first indication information, the terminal device may determine, according to the second field in the DCI, that the first signal is sent.
  • the used MCS determines the first port used to transmit the first signal according to the MCS.
  • first port is used to directly indicate the first port or the second field is used to indicate the first port, which may be a protocol or a high-level signaling configuration, which is not limited in this embodiment of the present application.
  • 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 to indicate that the index value of the first antenna port is X, and the index value of the second antenna port is X+1 or X-1, and X is a positive integer greater than 1.
  • the switching criterion of the antenna port (ie, the physical port) used by the terminal device to send the first signal may be: according to the antenna port of the terminal device.
  • the index values are ordered (or reversed) to switch. For example, if the terminal device sends the second signal using physical port 1, the terminal device sends the first signal using physical port 2.
  • 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 to indicate that the index value of the sounding reference signal SRS resource corresponding to the first signal is Y, and the index value of the SRS resource corresponding to the second signal is Y+1 or Y-1.
  • Y is a positive integer greater than one.
  • the switching criterion of the port used by the terminal device to send the first signal may be: according to the index value sequence of the SRS resource of the terminal device (or Reverse order) to switch.
  • the network device configures at least one SRS resource for the terminal device, and the SRS sent on the SRS resource is a pre-coded SRS, and the SRS sent on each SRS resource corresponds to a feature vector, that is, a precoding matrix, according to the sent SRS resource.
  • the index determines the switching sequence. If the terminal device sends the second signal to use the precoding matrix corresponding to the SRS resource 1, the terminal device may use the precoding matrix corresponding to the SRS resource 2 to send the first signal.
  • 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 to indicate that an index value of the first precoding matrix is Z, where an index value of the second precoding matrix is Z+1 or Z-1, and Z is a positive integer greater than 1. .
  • the set of the pre-coding matrix index may be pre-defined, or may be configured by the network device by using the high-layer signaling, which is not limited in this embodiment of the present application.
  • the foregoing first indication information may be used to notify the terminal device whether to send the first signal by using a precoding matrix polling transmission manner, and may also be used to notify the terminal device to send the PUSCH precoding resource.
  • the precoding matrix polling means that data is sent by using different precoding matrices on time-frequency resources according to a predefined granularity. For example, a precoding matrix polling transmission with a granularity of 1 resource block (RB) is Each RB occupied by the PUSCH in the frequency domain uses a different precoding matrix to transmit the PUSCH.
  • the present application further provides another data transmission method, including: the terminal device receives the downlink control information DCI, where the DCI is used to indicate the first indication information and the second indication information; wherein the first indication information is the first mask Code information or first scrambling code information, the first mask information is determined by the terminal device by using downlink control information DCI, and the DCI carries a cyclic redundancy check code scrambled by the first mask information.
  • the first scrambling code information is determined by the terminal device by using downlink control information DCI, where the DCI carries information bits scrambled by the first scrambling code information, and the second indication information is used to indicate SRS resources. Index value
  • the terminal device Determining, by the terminal device, the first antenna port according to the first indication information, the second indication information, and the first mapping relationship, where the first mapping relationship is used to indicate the first indication information, the Corresponding relationship between the second indication information and the first antenna port.
  • the format of the DCI is DCI format 0_1.
  • the network device may jointly indicate, by using the first indication information and the second indication information, the first antenna port that is used to send the first signal.
  • there is a first mapping relationship where the first mapping relationship is used to indicate Correspondence between the first antenna port and the first indication information and the second indication information.
  • the first mapping relationship may be a protocol, or may be configured by the network device through the high layer signaling, which is not limited in this embodiment of the present application.
  • the foregoing second indication information may be an SRS resource indication field (SRI), and the network device configures more than one SRS resource (each SRS resource configuration information includes one SRS resource ID number), and the terminal The device sends an SRS on the SRS resource based on the configuration information of the SRS.
  • SRI SRS resource indication field
  • Each SRS selects a corresponding sending mode according to its configuration information (port used, time-frequency resources occupied, etc.), and the network device receives and measures multiple SRSs.
  • the network device instructs the terminal device to select one of the multiple SRS resources configured by the SRI in the DCI, and the transmission mode adopted by the terminal device to transmit the PUSCH may be sent by using the SRS resource indicated by the SRI. The way SRS is sent.
  • Step 1 The network device configures the DCI format of the terminal device in the specific search space by the high layer signaling to be format 0_0.
  • Step 2 The network device sends a DCI (corresponding to the first downlink control information) for scheduling PUSCH transmission on the 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 DCI CRC mask (corresponding to the first mask) may be used to indicate port information used for PUSCH single port transmission, and the port information may include an antenna port and precoding. Matrix information, spatial filtering information, etc.
  • the status bit 0 of the CRC mask indicates that the terminal device sends the port information used by the PUSCH to refer to the transmission mode adopted by the last signal sent by the terminal device; the status bit 1 of the CRC mask indicates that the terminal device sends the current PUSCH.
  • the port information used does not refer to the transmission mode adopted by the latest signal, that is, the port information used by the terminal device to transmit the current PUSCH is different from the transmission mode used by the latest signal.
  • the signal can be PUSCH, PUCCH or PRACH.
  • FIG. 3 shows a schematic diagram of a scenario in which the above signal is a PUSCH.
  • the status bit of the CRC mask is 0, indicating that the last PUSCH transmission mode is referenced, and the status bit of the CRC mask is 1 indicating that the previous PUSCH transmission mode is not referenced.
  • the method for determining the current PUSCH, that is, the port information may also be determined according to the rules stipulated in the protocol, which is not limited in this embodiment of the present application.
  • FIG. 3 is only an example of a port index.
  • the port index of the PUSCH is 1, which is the same as the port index of the last PUSCH.
  • the status bit is 1, the port index of the PUSCH is 0, and The port index of the last PUSCH is different.
  • the network device can ensure that the PUSCH transmission performance is improved when the channel condition is deteriorated or the uplink interference control is considered, and the terminal device is notified to switch the port used for transmitting the PUSCH before the handover is performed. And the indication does not increase the overhead of DCI.
  • the PRACH or PUCCH transmission generally adopts a relatively robust manner, and the transmission of the PUSCH reference PRACH or PUCCH can effectively improve the reliability of the PUSCH transmission.
  • the frequency domain resources occupied by the PRACH/PUCCH are relatively limited, and the corresponding transmission mode is superior to the PUSCH scheduling in the frequency domain resources with similar frequency domain resources, and the PUSCH scheduling is uncorrelated in the frequency domain resources.
  • the frequency domain resource is not optimal. Therefore, the PRACH/PUCCH transmission mode may not be a preferred scheme for the PUSCH transmission.
  • the network device can be flexibly configured for the terminal part, which greatly improves the flexibility of the PUSCH transmission.
  • the status bit information may be the last bit of the CRC mask, which is 0 or 1, as shown in Table 1 below.
  • the terminal device may further determine the port information currently used to transmit the PUSCH according to the predefined rule, so that the terminal device and the network device are aligned. This is because the MCS used by the network device to determine the PUSCH transmission and the time-frequency resource allocation are calculated based on the PUSCH transmission using a specific port and a precoding matrix. If the terminal device switching port is not specified as a specific port, The MCS used for the PUSCH transmission indicated by the network device and the port on which the time-frequency resource allocation is based may not match the port used by the terminal device to actually transmit the PUSCH, which may cause loss of PUSCH performance.
  • the predefined rules can include the following:
  • the switching criterion of the physical port used by the terminal device to transmit the current PUSCH when the network device indicates the status bit 1 of the CRC mask is as follows:
  • Determining the switching order according to the order of the index values of the physical ports of the terminal device that is, if the terminal device sends the index value of the physical port of the last PUSCH to be 1, the terminal device sends the index value of the physical port of the PUSCH. Is 2;
  • the uplink channel and the downlink channel are irrelevant.
  • the terminal device cannot obtain the uplink channel through the downlink channel measurement, and the network device cannot perform measurement through the uplink channel to obtain the downlink. channel.
  • the switching criteria of the physical port used by the terminal device to transmit the current PUSCH when the network device indicates the status bit 1 of the CRC mask can be pre-defined:
  • the transmission mode is switched according to a certain order, that is, if the codebook index used by the terminal device to transmit the latest PUSCH is 1, the terminal device sends the codebook index used by the PUSCH to 2 ;
  • the terminal device can obtain the uplink channel through downlink channel measurement, and the network device can also measure through the uplink channel. Get the downlink channel.
  • the switching criteria of the physical port used by the terminal device to transmit the current PUSCH when the network device indicates the status bit 1 of the CRC mask can be pre-defined:
  • the switching sequence is determined from high to low, and may be, for example, switching from a feature vector corresponding to the obtained feature value to a feature vector having a low corresponding feature value; or
  • the network device configures at least one SRS resource for the terminal device, and the SRS sent on the SRS resource is a pre-coded SRS, and the SRS sent on each SRS resource corresponds to one feature vector, that is, a precoding matrix, according to the sent SRS.
  • the index of the resource determines the handover sequence. If the terminal device sends the precoding matrix corresponding to the SRS resource 1 in the last PUSCH, the terminal device sends the precoding matrix corresponding to the SRS resource 2 in the current PUSCH.
  • FIG. 4 shows another schematic diagram of the above signal as a PUSCH.
  • the status bit of the CRC mask is 0, indicating that the previous PUSCH transmission mode is referenced, and the status bit of the CRC mask is 1 indicating that the previous PUSCH transmission mode is not referred to.
  • the rules stipulated in the protocol directly refer to the transmission method adopted by the most recent PUCCH. It should be understood that FIG. 4 only takes the index of the port as an example.
  • the port index of the PUSCH is 1, which is the same as the port index of the previous PUSCH.
  • the status bit is 1
  • the port index of the PUSCH is 0, which is different from the port index of the last PUSCH and the same as the port index of the last PUCCH.
  • Step 1 The network device configures the DCI format of the terminal device in the specific search space by the high layer signaling to be format 0_0.
  • Step 2 The network device sends a DCI (corresponding to the first downlink control information) for scheduling PUSCH transmission on the time-frequency resource corresponding to the specific search space of the terminal device.
  • the frequency domain resource allocation field in the DCI format 0_0 indicates that the allocated frequency domain resource is 0 RB, and some fields in the DCI format 0_0, such as the TDRA/MCS/RV/NDI field, may be used.
  • the port information indicating that the terminal device currently transmits the PUSCH.
  • the network device may be used to indicate that the relevant field of the PUSCH transmission can be used to indicate the port information.
  • the terminal device determines whether other fields in the DCI format are used to indicate the port information by interpreting the value of the resource allocation field.
  • the network device may transmit the rank information, the precoding information, the PRG size, and the like of the PUSCH by multiplexing the foregoing fields. For example, when the base station indicates the PUSCH resource scheduling by using the DCI, the time domain resource allocation field/frequency domain resource allocation field is encoded as all 0s. And the corresponding bit of the MCS and NDI fields are sent according to the indication of the TPMI and TRI fields, that is, the MCS and NDI fields are used as existing TPMI and TRI fields, and a certain bit of the MCS and NDI fields at this time It indicates the corresponding information of a certain TPMI and TRI.
  • the terminal device When the terminal device learns that the bit corresponding to the frequency domain resource allocation field is all 0, the terminal device interprets the MCS and NDI fields in the above field as fields indicating TPMI and TRI, and the MCS and NDI fields obtained by the terminal device decoding at this time. The corresponding bits acquire TPMI and TRI information.
  • the PUSCH scheduled by the predefined DCI format 0_0 sends an indication of the DCI format 0_0 complying with the latest unscheduled frequency domain resource.
  • a block represents a time unit
  • 0_0+ indicated by the network device in the first time unit indicates that the frequency domain resource allocation in the DCI format 0_0 of the current indication is 0 RB.
  • the 0_0 indicated by the network device in the third time unit indicates that the frequency domain resource allocation in the DCI format 0_0 of the current indication is greater than 0 RB.
  • the PUSCH triggered by the DCI is adopted. Port 0, and so on.
  • the network device uses the special DCI format 0_0, that is, the DCI unscheduled PUSCH, to indicate the port information used by the subsequent PUSCH, so that the terminal device only needs to blindly detect the DCI of one format, thereby reducing the terminal device.
  • the complexity of blind detection is not limited to the DCI format 0_0, that is, the DCI unscheduled PUSCH, to indicate the port information used by the subsequent PUSCH, so that the terminal device only needs to blindly detect the DCI of one format, thereby reducing the terminal device.
  • the embodiment of the present application is directed to a scenario in which the number of SRS resource ports that the uplink device supports only the uplink single port transmission or the network device is set to 1.
  • the terminal device may be a scenario in which the terminal device has 4 receiving antennas but only one transmitting antenna, or a scenario in which the terminal device has 4 antennas and 4 antennas can be used for data reception at the same time but cannot be simultaneously used for data transmission.
  • Terminal device referred to as 1T4R
  • the network device cannot transmit the port indication of the PUSCH to the terminal device only through the field in the DCI format 0_1, and the status bit and the SRI information in the joint CRC mask are required to jointly indicate the port information used by the terminal device to transmit the PUSCH.
  • Step 1 The network device configures the DCI format of the terminal device in the specific search space by the high layer signaling to be format 0_1.
  • Step 2 The network device sends a DCI (corresponding to the first downlink control information) for scheduling PUSCH transmission on the time-frequency resource corresponding to the specific search space of the terminal device.
  • the SRI and the CRC mask in the DCI format 0_1 may jointly indicate the physical port information used by the terminal device to send the PUSCH.
  • the first to fourth antenna ports in Table 2 are associated with the SRS resource index used for SRS antenna switching, and can be defined in the protocol.
  • the SRS transmitted on the SRS resource for SRS antenna switching uses antenna ports of different terminal devices.
  • Antenna port CRC mask and SRI First antenna port ⁇ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>+’0’
  • Second antenna port ⁇ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>+’1’
  • Third antenna port ⁇ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>+’0’
  • Fourth antenna port ⁇ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1>+’1’
  • the terminal device can directly determine the antenna port used for transmitting the PUSCH according to the status bit and the SRI in the CRC mask, and ensure that the network device and the terminal device understand the same, thereby improving data transmission. Reliability.
  • the data transmission method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 5.
  • 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 FIG.
  • FIG. 6 shows a terminal device 600 provided by an embodiment of the present application.
  • the terminal device 600 includes:
  • the receiving unit 610 is configured to receive downlink information sent by the base station, where the downlink information is a cyclic redundancy check (CRC) code after mask scrambling;
  • CRC cyclic redundancy check
  • the processing unit 620 is configured to obtain the mask according to the downlink information, where the mask includes indication information for indicating whether the terminal device sends a first signal by using a port used by sending the second signal, where Transmitting, by the terminal device, the second signal before transmitting the first signal; and determining, according to the indication information, a port that sends the first signal; and
  • the sending unit 630 is configured to send the first signal on the determined port.
  • the terminal device of the embodiment of the present application indicates, by using the first indication information, whether the port used by the currently transmitted first signal is the same as the port used by the previously sent second signal, so that the terminal device is configured according to the first indication information. Determining the port information of the PUSCH is beneficial to improve the reliability of data transmission.
  • the port for transmitting the first signal includes one or more of the following information: an antenna port, a precoding matrix, and spatial filtering.
  • 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.
  • the second signal is a signal carried on a PUSCH, a signal carried on a PUCCH, or a random access preamble sequence.
  • the downlink information is a CRC code that is scrambled by the mask of downlink control information (DCI).
  • DCI downlink control information
  • the mask is 16 bits, and the indication information is one or more bits of the mask.
  • the last bit of the mask takes a value of 0, indicating that the port that sends the first signal is the same as the port that sends the second signal.
  • the port that sends the first signal is different from the port that sends the second signal.
  • the format of the DCI is format 0_0 or format 0_1.
  • the index value of the antenna port of the port that sends the first signal is X
  • the antenna port index of the port that sends the second signal is X+1 or X-1
  • X is greater than or equal to 1. Positive integer.
  • the index value of the precoding matrix of the port that sends the first signal is Z
  • the index value of the precoding matrix of the port that sends the second signal is Z+1 or Z-1, where Z is A positive integer greater than or equal to 1.
  • the terminal device 600 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • processor eg, a shared processor, a proprietary processor, or a group
  • memory merge logic, and/or other suitable components that support the described functionality.
  • the terminal device 600 may be specifically the terminal device in the foregoing embodiment, and the terminal device 600 may be used to perform various processes and/or corresponding to the terminal device in the foregoing method embodiments. Steps, to avoid repetition, will not be repeated here.
  • FIG. 7 shows a base station 700 provided by an embodiment of the present application, where the base station 700 includes:
  • the processing unit 710 is configured to perform scrambling on a cyclic redundancy check (CRC) code by using a mask to obtain a scrambled CRC code, where the mask includes indicating whether the terminal device uses the second signal to send The port used to transmit indication information of the first signal, wherein the second signal and the first signal are both sent by the terminal device, and the second signal is sent before the first signal; and
  • CRC cyclic redundancy check
  • the sending unit 720 is configured to send the scrambled CRC code to the terminal device.
  • the network device of the embodiment of the present application indicates, by using the first indication information, whether the port used by the currently transmitted first signal is the same as the port used by the previously sent second signal, so that the terminal device is configured according to the first indication information. Determining the port information of the PUSCH is beneficial to improve the reliability of data transmission.
  • the port for transmitting the first signal includes one or more of the following information: an antenna port, a precoding matrix, and spatial filtering.
  • 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.
  • the second signal is a signal carried on a PUSCH, a signal carried on a PUCCH, or a random access preamble sequence.
  • the scrambled CRC code is a CRC code of the downlink control information (DCI) that is scrambled by the mask.
  • DCI downlink control information
  • the mask is 16 bits, and the indication information is one or more bits of the mask.
  • the last bit of the mask takes a value of 0, indicating that the port that sends the first signal is the same as the port that sends the second signal.
  • the port that sends the first signal is different from the port that sends the second signal.
  • the format of the DCI is format 0_0 or format 0_1.
  • the index value of the antenna port is X
  • the antenna port index of the port that sends the second signal is X+1 or X-1
  • X is a positive integer greater than or equal to 1.
  • the index value of the precoding matrix is Z, where an index value of a 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.
  • the base station 700 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • the base station 700 may be specifically the network device in the foregoing embodiment, and the base station 700 may be used to perform various processes and/or steps corresponding to the network device in the foregoing method embodiment. To avoid repetition, we will not repeat them here.
  • 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.
  • the processor 810, the transceiver 820, and the memory 830 communicate with each other through an internal connection path.
  • the memory 830 is configured to store instructions, and the processor 810 is configured to execute instructions stored in the memory 830 to control the transceiver 820 to send signals and / or receive signals.
  • the transceiver 820 is configured to receive downlink information sent by the base station, where the downlink information is a cyclically scrambled (CRC) code after mask scrambling; the processor 810 is configured to: according to the downlink Obtaining the mask, the mask including indication information indicating whether the terminal device uses a port used to send the second signal to send the first signal, where the terminal device is transmitting the first Transmitting the second signal before the signal; and determining, according to the indication information, a port for transmitting the first signal; the transceiver 820 is further configured to send the first signal on the determined port.
  • CRC cyclically scrambled
  • the terminal device 800 may be specifically the terminal device in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the terminal device in the foregoing method embodiments.
  • the memory 830 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 810 can 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 various steps of the method embodiment corresponding to the terminal device described above and/or Or process.
  • 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.
  • the processor 910, the transceiver 920, and the memory 930 communicate with each other through an internal connection path.
  • the memory 930 is configured to store instructions, and the processor 910 is configured to execute instructions stored in the memory 930 to control the transceiver 920 to send signals and / or receive signals.
  • the processor 910 is configured to use a mask to scramble a cyclic redundancy check (CRC) code to obtain a scrambled CRC code, where the mask includes a second device for indicating whether the terminal device uses the second transmission.
  • the transceiver 920 is configured to send the scrambled CRC code to the terminal device.
  • the base station 900 may be specifically the network device in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the network device in the foregoing method embodiment.
  • the memory 930 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 910 can be configured to execute instructions stored in a memory, and when the processor 910 executes instructions stored in the memory, the processor 910 is configured to perform the various steps of the method embodiments corresponding to the network device described above and/or Or process.
  • the processor of the foregoing apparatus may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor.
  • the software unit can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application may be in essence or part of the contribution 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.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données, un dispositif terminal et un dispositif de réseau. Le procédé comporte les étapes suivantes: un dispositif terminal acquiert des premières informations d'indication à un Nième instant d'émission, les premières informations d'indication étant utilisées pour indiquer si un premier port utilisé pour émettre un premier signal est le même qu'un second port utilisé pour émettre un second signal, et le second signal étant émis par le dispositif terminal à un instant d'émission N-K, N et K étant tous deux des entiers positifs, et N étant supérieur à K; et le dispositif terminal émet le premier signal selon les premières informations d'indication. Le premier port comporte au moins un des éléments d'informations suivants: un premier port d'antenne utilisé pour émettre le premier signal, une première matrice de précodage utilisée pour émettre le premier signal, et un premier filtre spatial utilisé pour émettre le premier signal. Le procédé de transmission de données, le dispositif terminal et le dispositif de réseau selon les modes de réalisation de la présente invention facilitent l'amélioration de la fiabilité d'une transmission de données.
PCT/CN2019/081301 2018-04-04 2019-04-03 Procédé de transmission de données, dispositif terminal et dispositif de réseau WO2019192530A1 (fr)

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