WO2018202071A1 - 数据传输方法、终端设备和网络设备 - Google Patents

数据传输方法、终端设备和网络设备 Download PDF

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Publication number
WO2018202071A1
WO2018202071A1 PCT/CN2018/085439 CN2018085439W WO2018202071A1 WO 2018202071 A1 WO2018202071 A1 WO 2018202071A1 CN 2018085439 W CN2018085439 W CN 2018085439W WO 2018202071 A1 WO2018202071 A1 WO 2018202071A1
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Prior art keywords
type
csi
terminal device
reporting
network device
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PCT/CN2018/085439
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English (en)
French (fr)
Inventor
金黄平
韩玮
尚鹏
蒋鹏
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华为技术有限公司
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Priority to EP18793813.9A priority Critical patent/EP3614590A4/en
Publication of WO2018202071A1 publication Critical patent/WO2018202071A1/zh
Priority to US16/673,395 priority patent/US11239895B2/en

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    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0658—Feedback reduction
    • 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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • 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
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method, a terminal device, and a network device for data transmission in the field of communications.
  • Multiple-user multiple-input multiple-output (MIMO) technology refers to using multiple transmit and receive antennas at the transmitting end and the receiving end respectively, so that signals are transmitted through multiple antennas at the transmitting end and the receiving end. receive.
  • massive MIMO large-scale antenna array
  • Massive MIMO systems network equipment can be configured with dozens or even hundreds of antennas, which can be used simultaneously to dozens of users. At the same time, the same frequency resource sends different data streams, which achieves a significant increase in spectrum efficiency.
  • Channel state information is used to indicate the channel attributes of the communication link.
  • the accuracy of the CSI acquired by the network device largely determines the performance of the Massive MIMO system.
  • FDD time division duplexing
  • TDD time division duplexing
  • the terminal equipment needs to evaluate the CSI, and the codebook will be used. It is quantified and reported to network devices.
  • a beam combination reporting technique can be used, and the terminal device can perform weighted superposition of multiple codewords to compensate for the precision loss of a single codeword.
  • the beam superposition reporting technique When the beam superposition reporting technique is adopted, multiple beam position information and coefficient quantization information need to be reported, which is expensive. At present, a typical method for reducing the feedback overhead reduces the overhead by performing the hierarchical reporting of the CSI.
  • T and N are integers greater than zero.
  • the CSIs of the packets are reported in advance at the T time, and the network device and the terminal device cannot change the content reported by the CSI. How to improve the flexibility of the CSI reporting becomes an urgent solution. Technical problem.
  • the data transmission method, the terminal device, and the network device provided by the embodiments of the present application can improve the flexibility of CSI reporting, thereby improving system performance.
  • the first aspect provides a data transmission method, including: determining, by a terminal device, a reporting type of a channel state information CSI, where the reporting type is used to indicate a CSI and a history of a beam currently reported by the terminal device in a current reporting period.
  • the number N, N is an integer greater than or equal to 1.
  • the network device may send a reference signal to the terminal device to measure the channel state, and after receiving the reference signal sent by the network device, the terminal device may feed back the CSI of the at least one beam to the network device, where the network device receives the The CSI of the arriving beam is processed to obtain the measurement result.
  • the reference signal may be a channel state information reference signal (CSI-RS), but the embodiment of the present application does not limit this.
  • the terminal device and the network device are required to determine the CSI reporting type, where the reporting type is used to indicate the CSI of the beam currently reported by the terminal device in the current reporting period. Relationship with the CSI of the historically reported beam. Furthermore, the terminal device and the network device can also determine a codebook parameter for indicating the number N of currently reported beams.
  • the codebook parameter may be pre-agreed, or may be negotiated by the network device and the terminal device before each CSI report, which is not limited in this embodiment of the present application.
  • the terminal device selects CSIs of the N beams according to the determined reporting type of the CSI and the codebook parameters, and feeds back the CSIs of the N beams to the network device.
  • the network device receives the CSI of the N beams that are fed back by the terminal device, and determines the measurement result according to the reporting type of the CSI, that is, the current channel state of the downlink channel.
  • the terminal device and the network device negotiate the CSI report type, and the terminal device can send the CSI corresponding to the negotiated report type to the network device, so that the network device or the terminal device can make the network device or the terminal device according to the actual situation.
  • the CSI reported at the current time is adjusted to meet the changing needs of the channel, thereby improving the flexibility of CSI reporting and improving system performance.
  • the reporting type is any one of the following types: a first type, a second type, and a third type, where the first type is used to represent the The currently reported CSI is the CSI of the new reporting period, and the second type is used to indicate that the currently reported CSI is the incremental information of the CSI of the historically reported beam, and the third type is used to indicate the The currently reported CSI is the update information of the CSI of the historically reported beam.
  • the above-described first type, second type, and third type may be referred to as an independent type, an enhanced type, and an update type, respectively.
  • the independent type is used to indicate that the terminal device starts the reporting of the new CSI. If the channel status changes or the network device needs to instruct the terminal device to re-initiate the CSI report, the reporting type of the CSI reported by the terminal device may be independent.
  • the enhanced type is used to indicate that the CSI reported by the terminal device at the current time is the incremental information of the historically reported CSI, that is, the terminal device has reported the basic CSI information, and the currently reported information of the enhanced CSI is used for the basic information. The information of the CSI is supplemented to improve the accuracy of the CSI reporting.
  • the update type is used to indicate that the terminal device needs to update the historically reported partial CSI. If the channel is partially changed, the reporting type corresponding to the CSI reported by the terminal device may be the update type. .
  • the CSI reported by the terminal device can be changed in real time. If the channel does not change, the terminal device may report the basic CSI information, and report the enhanced CSI information, and indicate that the reporting type corresponding to the network device is an enhanced type, thereby improving the reporting accuracy of the CSI. After the channel is changed, the terminal device may trigger a new CSI report, or update the CSI of the currently reported beam, and indicate that the report type corresponding to the network device is an independent type or an update type, thereby improving the accuracy of CSI reporting.
  • the terminal device sends CSIs of N beams to the network device according to the reporting type and the codebook parameter
  • the method further includes: determining, by the terminal device, the codebook parameter; and determining, by the terminal device, the currently reported N beams according to the reporting type and the codebook parameter.
  • the terminal device needs to determine which beams are used for CSI reporting at the current time before reporting the CSI.
  • the terminal device can determine the number of CSIs that need to be reported at the current time according to the codebook parameters, and then determine, according to the reporting type, the beam that needs to be reported by the CSI.
  • the terminal device determines, according to the reporting type and the codebook parameter, the currently reported N The beam includes: if the reporting type is the first type, the terminal device determines a CSI report to start a new reporting period, and determines a beam corresponding to the N CSIs as the N beams; if the reporting type For the second type, the terminal device determines a beam corresponding to the N CSIs in the CSI that has not been reported in the current reporting period as the N beams; if the reporting type is the third type, the terminal The device determines, as the N beams, the beams corresponding to the N CSIs that need to be updated in the CSI that have been reported in the current reporting period.
  • the reporting type of the CSI is that the network device and the terminal device negotiate together before the CSI reports the CSI, that is, the reporting type of the CSI determined by the network device and the terminal device must be the same.
  • the device correctly processes the CSI reported by the terminal device.
  • the network device and the terminal device may determine the reporting type of the CSI in multiple manners. Specifically, the reporting type may be determined by the terminal device, and may be notified by the network device, and may be notified by the network device. The device is not limited in this embodiment.
  • the determining, by the terminal device, the reporting type of the channel state information CSI includes: determining, by the terminal device, the downlink channel state,
  • the reporting method further includes: the terminal device sending, to the network device, a flag bit for indicating the reporting type according to the reporting type.
  • the terminal device may determine the report type according to the downlink channel state. For example, if the downlink channel changes greatly, the terminal device may determine that the report type is the first type, and if the downlink channel does not change, the terminal device The device may determine that the reporting type is the second type. If the downlink channel changes slightly, the terminal device may determine that the reporting type is the third type. After determining the report type, the terminal device may send the report type to the network device, and the network device receives the report type sent by the terminal device, thereby determining the CSI report type reported by the terminal device and correcting the CSI. Ground treatment.
  • the terminal device may indicate the reporting type of the CSI that is reported by sending the flag bit to the network device, and the flag bit has a preset correspondence relationship with the reporting type.
  • the method further includes: when the reporting type is the first type or the second type, the terminal device receives a flag bit sent by the network device, where the flag bit is used to indicate Declaring the report type; the terminal device determines the report type according to the flag bit.
  • the network device may determine the reporting type according to the CSI of the beam that is reported by the terminal device in the current reporting period. For example, if the network device determines that the historically reported CSI is useless, the network device needs to start a new CSI reporting. The device may determine that the reporting type is the first type. If the network device determines that the historically reported CSI is not accurate enough, the network device may determine that the reporting type is the second type. After determining the report type, the network device may send the report type to the terminal device, and the terminal device receives the report type sent by the network device, thereby determining the CSI report type reported by the terminal device, and selecting the correct type. CSI is reported.
  • the network device may indicate, by sending a flag bit to the terminal device, a report type of the CSI that is reported, and the flag bit has a preset correspondence relationship with the report type.
  • the method further includes: the terminal device to the network The device sends the codebook parameter.
  • the terminal device and the network device need to determine not only the current CSI reporting type but also the current codebook parameter used for reporting the CSI.
  • the codebook parameter may be determined by the network device, and may be notified to the terminal device, or may be determined by the terminal device, and notified to the network device, which is not limited in this embodiment of the present application.
  • the network device can actively change the content of the CSI report, that is, actively determine the CSI reporting type and the codebook parameter, and send the same to the terminal device.
  • the reporting type is the update type
  • only the terminal device can initiate the reporting of the third type of CSI, because the network device cannot learn the channel state.
  • the codebook parameter corresponding to the third type is only It can be determined by the terminal device and notified to the network device.
  • the CSI includes at least one of the following information: a precoding matrix indicating a PMI, a rank indication RI, and a channel quality indicator CQI.
  • a data transmission method including: determining, by a network device, a reporting type of a channel state information CSI of a terminal device, where the reporting type is used to indicate a beam currently reported by the terminal device in a current reporting period.
  • the relationship between the CSI and the CSI of the historically reported beam the network device receives the CSI of the N beams sent by the terminal device, where N is an integer greater than or equal to 1; the network device according to the codebook parameter
  • the reporting type and the CSI of the N beams determine a current channel state of the downlink channel, where the codebook parameter is used to indicate the number N of beams currently reported by the terminal device.
  • the terminal device and the network device negotiate the CSI report type, and the terminal device can send the CSI corresponding to the negotiated report type to the network device, so that the network device or the terminal device can make the network device or the terminal device according to the actual situation.
  • the CSI reported at the current time is adjusted to meet the changing needs of the channel, thereby improving the flexibility of CSI reporting and improving system performance.
  • the reporting type is any one of the following types: a first type, a second type, and a third type, where the first type is used to represent the The currently reported CSI is the CSI of the new reporting period, and the second type is used to indicate that the currently reported CSI is the incremental information of the CSI of the historically reported beam, and the third type is used to indicate the The currently reported CSI is the update information of the CSI of the historically reported beam.
  • the network device determines, according to the reporting type, the codebook parameter, and CSI of the N beams,
  • the current channel state of the downlink channel includes: if the reporting type is the first type, the network device determines that the terminal device starts a new reporting period, and determines the current channel state according to CSI of the N beams; If the reporting type is the second type, the network device aggregates the CSI of the N beams with the CSI of the reported beam in the current reporting period to obtain the current channel state;
  • the reporting type is the third type, and the network device updates the CSI of the N beams that have been reported in the current reporting period to the CSI of the N beams currently reported by the terminal device, and according to the updated beam.
  • the CSI determines the current channel state.
  • the determining, by the network device, the reporting type of the channel state information CSI of the terminal device includes: In the case of the first type or the second type, the network device determines the report type according to the CSI of the historically reported beam; the method further includes: the network device according to the report type, Sending the flag bit for indicating the reporting type to the terminal device.
  • the method further includes: the network device determining the codebook parameter; where the reporting type is the first type or the second type, the network device is The terminal device sends the codebook parameter.
  • the method further includes: the network device receiving the codebook parameter sent by the terminal device.
  • the CSI includes at least one of the following information: a precoding matrix indication PMI, a rank indication RI, and a channel quality indicator CQI.
  • 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.
  • a network device for performing the method of any of the second aspect or any of the possible implementations of the second 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.
  • a 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
  • the processor executes the instructions stored by the memory, the executing causes the terminal device to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • a network 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
  • the processor executes the instructions stored by the memory, the executing causes the network device 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 Network device 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 network device 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 terminal device, causing the terminal device to perform the first aspect or the first aspect A method in a possible implementation.
  • a computer program product comprising: computer program code, when the computer program code is executed by a network device, causing the network device to perform the second aspect or the second aspect A method in a possible 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 block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 4 shows a schematic block diagram of a network device in accordance with an embodiment of the present application.
  • FIG. 5 shows a schematic block diagram of another network device in accordance with an embodiment of the present application.
  • FIG. 6 shows a schematic block diagram of another terminal device 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.
  • FIG. 2 shows a schematic flowchart 200 of a data transmission method of an 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 terminal device determines a reporting type of the channel state information CSI, where the reporting type is used to indicate a relationship between a CSI of a beam currently reported by the terminal device and a CSI of a historically reported beam in a current reporting period;
  • the network device determines a report type of the channel state information CSI of the terminal device.
  • the terminal device sends CSIs of the N beams to the network device according to the reporting type and the codebook parameter, where the codebook parameter is used to indicate that the number of the currently reported beams N, N is greater than Or an integer equal to 1;
  • the network device receives the CSI of the N beams sent by the terminal device;
  • the network device determines a current channel state of the downlink channel according to the reporting type, the codebook parameter, and CSI of the N beams.
  • the choice of codebook mainly depends on the channel state information CSI.
  • the network device can obtain downlink CSI according to the uplink channel estimation by using the duality of the channel.
  • the downlink CSI can only be estimated by the terminal device due to the asymmetry of the uplink and downlink channels, and then the uplink channel is used for feedback.
  • the network device may send a reference signal to the terminal device to measure the channel state, and after receiving the reference signal sent by the network device, the terminal device may feed back the CSI of the at least one beam to the network device, where the network device receives the The CSI of the arriving beam is processed to obtain the measurement result.
  • the reference signal may be a channel state information reference signal (CSI-RS), but the embodiment of the present application does not limit this.
  • CSI-RS channel state information reference signal
  • the terminal device and the network device are required to determine the CSI reporting type, where the reporting type is used to indicate the CSI of the beam currently reported by the terminal device in the current reporting period. Relationship with the CSI of the historically reported beam. Furthermore, the terminal device and the network device can also determine a codebook parameter for indicating the number N of currently reported beams.
  • the codebook parameter may be pre-agreed, or may be negotiated by the network device and the terminal device before each CSI report, which is not limited in this embodiment of the present application.
  • the terminal device selects CSIs of the N beams according to the determined reporting type of the CSI and the codebook parameters, and feeds back the CSIs of the N beams to the network device.
  • the network device receives the CSI of the N beams that are fed back by the terminal device, and determines the measurement result according to the reporting type of the CSI, that is, the current channel state of the downlink channel.
  • the network device and the terminal device can configure the beam information to be reported in the next T time in advance, that is, in a reporting period, the CSI can be pre-configured for the terminal device. Multiple reporting times and beam information reported at each time. The network device and the terminal device cannot change the content reported by the CSI because the CSIs of the packets are reported in advance.
  • the terminal device and the network device negotiate the CSI report type, and the terminal device can send the CSI corresponding to the negotiated report type to the network device, so that the network device or the terminal device can make the network device or the terminal device according to the actual situation.
  • the CSI reported at the current time is adjusted to meet the ever-changing needs of the channel, thereby improving the flexibility of CSI reporting and improving system performance.
  • the codebook used to represent the CSI fed back by the terminal device may be represented as a two-level codebook structure, and is generally expressed as:
  • W 1 [b 1 b 2 ... b K ] represents a base (beam beam) selected from the codebook, and the total number is K, and W 2 represents a coefficient of the corresponding base, which can be expressed as:
  • ⁇ ij is a coefficient for representing amplitude information and phase information, i ⁇ ⁇ 1, . . . , K ⁇ , j ⁇ ⁇ 1, . . . , L ⁇ , and L is the number of transmission layers of the user signal.
  • b i is used to indicate the beam beam selected by the current feedback CSI when the beam superposition mechanism is used
  • c j is a coefficient, mainly includes amplitude information and phase information
  • p j is amplitude information used for the auxiliary indication coefficient.
  • the advantage of using the dual codebook structure is that the overhead can be reduced, pj is a broadband long-term parameter, can be consistent over the entire uplink bandwidth, can be notified once in a longer period, and cj is a sub-band short-term parameter, which can be The narrowband is notified once in a short period, but the embodiment of the present application does not limit this.
  • the terminal device may split the codebook W of the CSI into two levels of CSI for reporting, as follows:
  • the CSI reported based on the beams b 0 and b 1 may be referred to as basic CSI information, and the information based on the CSI reported by the beams b 2 and b 3 may be referred to as enhanced CSI information.
  • At least one beam for reporting basic CSI is a beam corresponding to the CSI with the largest amount of information in the CSI of all beams, and therefore, the basic CSI includes the main information of the CSI obtained by this measurement. If the beam used for reporting the basic CSI is one, the beam is the optimal beam in the beam selection reporting technique, and is not described here.
  • the at least one beam for reporting the enhanced CSI may be selected by the terminal device in the remaining beams except for the beam for reporting the basic CSI, so as to supplement the basic CSI information, so that the network device can obtain higher Accurate CSI, CSI feedback quality can be significantly improved.
  • the terminal device can report the basic CSI and then report the enhanced CSI.
  • the CSI reported by the terminal device increases, the CSI reporting accuracy is improved, and the accuracy of the network device measurement channel state is improved.
  • the terminal device may report a portion of the CSI information at different times, e.g., the terminal device may report information CSI is substantially 0 at a time T, the time T 0 + ⁇ T first enhanced reporting CSI information in T 0 + 2 * ⁇ T time to report the second enhanced CSI information, and so on, until all CSI information is reported.
  • the terminal device reports the basic CSI information at time T 0 is accurate, assuming that the channel changes between time T 0 and time T 0 + ⁇ T, the terminal device is at T 0 + ⁇ T
  • the information of the first enhanced CSI is not accurate at all times. Therefore, it is meaningless to continue to report the information of the first enhanced CSI and the information of the second enhanced CSI, and the CSI finally determined by the network device cannot accurately reflect the channel state.
  • the network device and the terminal device configure the beam information that needs to be reported in the next multiple times in advance, and the network device and the terminal device cannot change the CSI report content at each moment.
  • the embodiment of the present application proposes the concept of the CSI reporting type, so that the content of the CSI report at each moment is not fixed, and the content reported by the CSI can be flexibly changed.
  • the CSI report type can be other types.
  • the CSI report type can be other types.
  • the embodiment of the present application is not limited thereto.
  • reporting type is any one of the following types:
  • the first type is used to indicate that the currently reported CSI is a CSI of a new reporting period
  • the second type is used to indicate the currently reported CSI
  • the third type is used to indicate that the currently reported CSI is the update information of the CSI of the historically reported beam.
  • the reporting type of the CSI may include the first type, the second type, and the third type.
  • the first type is referred to as an independent type
  • the second type is referred to as an enhanced type
  • the third type is referred to as an updated type.
  • the independent type is used to indicate that the terminal device starts the reporting of the new CSI. If the channel status changes or the network device needs to instruct the terminal device to re-initiate the CSI report, the reporting type of the CSI reported by the terminal device may be independent.
  • the enhanced type is used to indicate that the CSI reported by the terminal device at the current time is the incremental information of the historically reported CSI, that is, the terminal device has reported the basic CSI information, and the currently reported information of the enhanced CSI is used for the basic information.
  • the information of the CSI is supplemented to improve the accuracy of the CSI reporting.
  • the update type is used to indicate that the terminal device needs to update the historically reported partial CSI. If the channel is partially changed, the reporting type corresponding to the CSI reported by the terminal device may be the update type. .
  • the CSI reported by the terminal device can be changed in real time. If the channel does not change, the terminal device may report the basic CSI information, and report the enhanced CSI information, and indicate that the reporting type corresponding to the network device is an enhanced type, thereby improving the reporting accuracy of the CSI. After the channel is changed, the terminal device may trigger a new CSI report, or update the CSI of the currently reported beam, and indicate that the report type corresponding to the network device is an independent type or an update type, thereby improving the accuracy of CSI reporting.
  • the method before the sending, by the terminal device, the CSI of the N beams to the network device according to the reporting type and the codebook parameter, the method further includes:
  • the terminal device needs to determine which beams are used for CSI reporting at the current time before reporting the CSI.
  • the terminal device can determine the number of CSIs that need to be reported at the current time according to the codebook parameters, and then determine, according to the reporting type, the beam that needs to be reported by the CSI.
  • the terminal device determines, according to the reporting type and the codebook parameter, the currently reported N beams, including:
  • the terminal device determines a CSI report to start a new reporting period, and determines a beam corresponding to the N CSIs as the N beams;
  • the terminal device determines, as the N beams, the beams corresponding to the N CSIs in the CSI that have not been reported in the current reporting period;
  • the terminal device determines, as the N beams, the beams corresponding to the N CSIs that need to be updated in the CSI that have been reported in the current reporting period.
  • the network device determines, according to the reporting type, the codebook parameter, and the CSI of the N beams, a current channel state of the downlink channel, including:
  • the network device determines that the terminal device starts a new reporting period, and determines the current channel state according to CSIs of the N beams;
  • the network device aggregates the CSI of the N beams with the CSI of the reported beam in the current reporting period to obtain the current channel state.
  • the network device updates the CSI of the N beams that have been reported in the current reporting period to the CSI of the N beams currently reported by the terminal device, and according to the update.
  • the CSI of the subsequent beam determines the current channel state.
  • the first type is referred to as an independent type
  • the second type is referred to as an enhanced type
  • the third type is referred to as an updated type.
  • the following describes the case where the above-mentioned reporting type is divided into an independent type, an enhanced type, and an updated type.
  • the terminal device determines that the CSI report needs to start the new reporting period. First, the terminal device determines, according to the codebook parameter, the CSI that needs to report the N beams, and then the terminal device will The N beams corresponding to the most CSIs are determined to be N beams that need to be reported, and the CSIs of the N beams are sent to the network device;
  • the network device receives the CSI of the N beams sent by the terminal device, and determines, according to the current CSI reporting type, that the CSI of the N beams reported by the terminal device is an independent type, and the network device determines that the terminal device starts.
  • the new CSI reports determines the CSI of the N beams as the basic CSI information, and further determines the current channel state.
  • the terminal device determines to report the enhanced CSI information. First, the terminal device determines, according to the codebook parameter, the CSI that needs to report the N beams, and then the terminal device will report the current reporting period. The N beams corresponding to the most CSIs in the unreported CSI are determined to be the N beams that need to be reported, and the CSIs of the N beams are sent to the network device;
  • the network device receives the CSI of the N beams sent by the terminal device, and determines, according to the current CSI reporting type, that the CSI of the N beams reported by the terminal device is an enhanced type, and the network device uses the N beams.
  • the CSI is determined to enhance the information of the CSI, and further determines the current channel state by combining the basic CSI information reported by the terminal device history.
  • the terminal device determines that the CSI that has been reported in the current reporting period needs to be updated. First, the terminal device determines, according to the codebook parameter, the CSI that needs to report the N beams. The terminal device determines the N beams corresponding to the N CSIs that need to be updated in the CSI that have been reported in the current reporting period, and sends the C beams of the N beams to the network device.
  • the network device receives the CSI of the N beams sent by the terminal device, and determines that the CSI of the N beams reported by the terminal device is an update type according to the current CSI reporting type, and the network device will report the current reporting period.
  • the CSI of the N beams that have been reported is updated to the CSI of the N beams currently reported by the terminal device, and the current channel state is further determined.
  • the reporting type of the CSI is that the network device and the terminal device negotiate together before the CSI reports the CSI, that is, the reporting type of the CSI determined by the network device and the terminal device must be the same.
  • the device correctly processes the CSI reported by the terminal device.
  • the network device and the terminal device may determine the reporting type of the CSI in multiple manners. Specifically, the reporting type may be determined by the terminal device, and may be notified by the network device, and may be notified by the network device. The device is not limited in this embodiment.
  • the terminal device determines a report type of the channel state information CSI, including:
  • the method further includes:
  • the network device determines the reporting type of the channel state information CSI of the terminal device, including:
  • the network device determines the report type according to the flag bit.
  • the terminal device may determine the type of the report according to the change of the downlink channel. For example, if the downlink channel changes greatly, the terminal device may determine that the report type is an independent type, and if the downlink channel does not change, the terminal The device may determine that the reporting type is an enhanced type. If a minor change occurs in the downlink channel, the terminal device may determine that the reporting type is an update type. After determining the report type, the terminal device may send the report type to the network device, and the network device receives the report type sent by the terminal device, thereby determining the CSI report type reported by the terminal device and correcting the CSI. Ground treatment.
  • the terminal device may indicate the reporting type of the CSI that is reported this time by sending a flag bit to the network device.
  • the flag has a preset correspondence with the report type, for example, the independent type corresponds to 00, the enhanced type corresponds to 01, the update type corresponds to 11, and the like, and the terminal device determines that the reporting type is an independent type.
  • the flag bit is determined to be 00, and 00 is sent to the network device.
  • the network device may according to the correspondence between the report type and the flag bit. , to determine that the escalation type is an independent type.
  • the network device determines the reporting type of the channel state information CSI of the terminal device, including:
  • the network device determines the reporting type according to the CSI of the historically reported beam
  • the method further includes:
  • the network device sends, according to the reporting type, a flag bit for indicating the reporting type to the terminal device.
  • the method further includes:
  • the terminal device determines the report type according to the flag bit.
  • the network device may determine the type of the report according to the CSI of the beam that is reported by the terminal device in the current reporting period. For example, if the network device determines that the historically reported CSI is useless, the network device needs to start a new CSI report. It can be determined that the reporting type is an independent type (ie, the first type), and if the network device determines that the historically reported CSI is not accurate enough, the network device may determine that the reporting type is an enhanced type (ie, the second type). After determining the report type, the network device may send the report type to the terminal device, and the terminal device receives the report type sent by the network device, thereby determining the CSI report type reported by the terminal device, and selecting the correct type. CSI is reported.
  • the reporting type is an independent type (ie, the first type)
  • the network device may determine that the reporting type is an enhanced type (ie, the second type).
  • the network device may send the report type to the terminal device, and the terminal device receives the report type sent by the network device,
  • the network device may indicate the reporting type of the CSI that is reported this time by sending a flag bit to the terminal device.
  • the flag has a preset correspondence with the report type, for example, the independent type corresponds to 00, the enhanced type corresponds to 01, the update type corresponds to 11, and the like, and after the network device determines that the report type is an independent type, According to the correspondence between the report type and the flag bit, the flag bit is determined to be 00, and 00 is sent to the terminal device. After receiving the flag bit 00, the terminal device may according to the correspondence between the report type and the flag bit. , to determine that the escalation type is an independent type.
  • the method before the determining, by the network device, the current channel state of the downlink channel, according to the codebook parameter, the reporting type, and the CSI of the N beams, the method further includes:
  • the network device sends the codebook parameter to the terminal device.
  • the method includes:
  • the terminal device receives the codebook parameter sent by the network device.
  • the method further includes:
  • the terminal device sends the codebook parameter to the network device.
  • the method further includes:
  • the network device receives the codebook parameter sent by the terminal device.
  • the terminal device and the network device need to determine not only the current CSI reporting type but also the current codebook parameter used for reporting the CSI.
  • the codebook parameter may be determined by the network device, and may be notified to the terminal device, or may be determined by the terminal device, and notified to the network device, which is not limited in this embodiment of the present application.
  • the network device can actively change the content of the CSI report, that is, the CSI report type is actively determined, only when the report type is the independent type (ie, the first type) or the enhanced type (that is, the second type). And the codebook parameters are sent to the terminal device.
  • the reporting type is the update type (that is, the third type)
  • the update type corresponds to The codebook parameter can also be determined only by the terminal device and notified to the network device.
  • the CSI includes at least one of the following information: a precoding matrix indicating PMI, a rank indication RI, and a channel quality indicator CQI.
  • the channel state information CSI that the terminal device feeds back to the network device may include a rank indication (RI), a pre-coding matrix indicator (PMI), and a channel quality indication (CQI). At least one of them.
  • the RI identifies the number of available layers in the spatial transmission of the transmitting end
  • the PMI identifies the codebook index of the optimal precoding matrix.
  • the CQI is the channel quality when the RI/PMI is reported, and is used by the transmitting end to select the transmission modulation mode and the coding rate.
  • the foregoing CSI may also include other information.
  • the foregoing CSI further includes coefficient quantization information, which is not limited by the embodiment of the present application.
  • the terminal device may be based on beam selection (beam selection) technique reported by selecting an optimal beam b 0 from a plurality of candidate beams, the transmitted beam b CSI 0 and network equipment, time, reported by the terminal device for indicating
  • the network device receives the CSI of the beam b 0 reported by the terminal device, determines the channel state of the current downlink channel according to the CSI of the beam b 0 , and performs data transmission according to the channel state.
  • the terminal device determines a flag bit of the currently reported CSI, where the flag bit is used to indicate a current reporting type of the CSI, and the terminal device sends the flag bit to the network device.
  • the network device receives the CSI of the beam b 1 reported by the terminal device, and receives a flag bit sent by the terminal device to indicate a report type of the current CSI, where the network device determines the terminal device by using the received flag bit.
  • the reporting type of the CSI reported at the second time is an enhanced type, and the network device aggregates the CSI of the beam b 1 with the CSI of the beam b 0 to obtain the channel state of the current downlink channel, and performs data transmission according to the channel state.
  • the terminal device may select two beams b 0 and b 1 corresponding to the CSI with the largest amount of information from the plurality of candidate beams, and send the beams b 0 and b 1 to the network device based on a beam combining reporting technique.
  • the network device receives the CSI of the beams b 0 and b 1 reported by the terminal device, determines the channel state of the current downlink channel according to the CSI of the beams b 0 and b 1 , and performs data transmission according to the channel state;
  • the terminal device determines a flag bit of the currently reported CSI, where the flag bit is used to indicate a current reporting type of the CSI, and the terminal device sends the flag bit to the network device.
  • the terminal device determines, according to the flag bit, that the reporting type of the CSI at the second moment is an enhanced type, and the terminal device selects two beams b 2 and b 3 from the candidate beams remaining except b 0 and b 1 to the network.
  • the network device receives the CSI of the beams b 2 and b 3 reported by the terminal device, and receives a flag bit sent by the terminal device to indicate a report type of the current CSI, where the network device determines by using the received flag bit.
  • the reporting type of the CSI reported by the terminal device at the second time is an enhanced type, and the network device aggregates the CSIs of the beams b 2 and b 3 with the CSIs of the beams b 0 and b 1 to obtain the channel state of the current downlink channel, and Data transmission is performed according to the channel state.
  • the terminal device determines a flag bit of the currently reported CSI, where the flag bit is used to indicate a current reporting type of the CSI, and the terminal device sends the flag bit to the network device.
  • the terminal device determines, according to the flag bit, that the reporting type of the CSI at the third moment is an enhanced type, and the terminal device selects two beams b 4 from the remaining candidate beams except b 0 , b 1 , b 2 , and b 3 .
  • the network device receives the CSIs of the beams b 4 and b 5 reported by the terminal device, and receives a flag bit sent by the terminal device to indicate a report type of the current CSI, where the network device determines by using the received flag bit.
  • the reporting type of the CSI reported by the terminal device at the third time is an enhanced type, and the network device aggregates the CSIs of the beams b 4 and b 5 with the CSIs of the beams b 0 , b 1 , b 2 , and b 3 to obtain the current downlink.
  • the channel state of the channel, and data transmission is performed according to the channel state.
  • the network device can obtain higher precision CSI, and the CSI feedback quality can be significantly improved.
  • the terminal device may select two beams b 0 and b 1 corresponding to the CSI with the largest amount of information from the plurality of candidate beams, and send the beams b 0 and b 1 to the network device based on a beam combining reporting technique.
  • the network device receives the CSI of the beams b 0 and b 1 reported by the terminal device, determines the channel state of the current downlink channel according to the CSI of the beams b 0 and b 1 , and performs data transmission according to the channel state;
  • the terminal device determines a flag bit of the currently reported CSI, where the flag bit is used to indicate a current reporting type of the CSI, and the terminal device sends the flag bit to the network device.
  • the terminal device determines, according to the flag bit, that the reporting type of the CSI at the second moment is an enhanced type, and the terminal device selects two beams b 2 and b 3 from the candidate beams remaining except b 0 and b 1 to the network.
  • the network device receives the CSI of the beams b 2 and b 3 reported by the terminal device, and receives a flag bit sent by the terminal device to indicate a report type of the current CSI, where the network device determines by using the received flag bit.
  • the reporting type of the CSI reported by the terminal device at the second time is an enhanced type, and the network device aggregates the CSIs of the beams b 2 and b 3 with the CSIs of the beams b 0 and b 1 to obtain the channel state of the current downlink channel, and Data transmission is performed according to the channel state.
  • the terminal device determines a flag bit of the currently reported CSI, where the flag bit is used to indicate a current reporting type of the CSI, and the terminal device sends the flag bit to the network device.
  • the terminal device determines, according to the flag bit, that the reporting type of the CSI at the third moment is an independent type, and the terminal device determines to trigger a new CSI report, re-measures the channel state, and selects the largest amount of information from the multiple candidate beams.
  • the CSIs correspond to the six beams b 0 -b 5 and send the CSIs of the current time beams b 0 -b 5 to the network device.
  • the network device receives the CSI of the beam b 0 -b 5 reported by the terminal device, and receives a flag bit sent by the terminal device to indicate the current CSI reporting type, and the network device determines by using the received flag bit.
  • the reporting type of the CSI reported by the terminal device at the third time is an independent type, and the network device determines that the terminal device starts a new reporting period, and determines a channel state of the current downlink channel according to the CSI of the beam b 0 -b 5 , and according to the Channel status for data transmission;
  • the terminal device determines a flag bit of the currently reported CSI, where the flag bit is used to indicate a current reporting type of the CSI, and the terminal device sends the flag bit to the network device.
  • the terminal device determines, according to the flag bit, that the reporting type of the CSI at the fourth moment is an update type, and the terminal device selects the beams b 4 and b 5 from the beams b 0 -b 5 that have been reported in the reporting period but the CSI changes.
  • the network device receives the CSIs of the beams b 4 and b 5 reported by the terminal device, and receives a flag bit sent by the terminal device to indicate a report type of the current CSI, where the network device determines by using the received flag bit.
  • the reporting type of the CSI reported by the terminal device at the fourth time is an update type, and the network device updates the CSI of the beams b 4 and b 5 reported by the terminal device at the third time, according to the updated beam b 0 -b 5
  • the CSI determines the channel state of the current downlink channel and performs data transmission according to the channel state.
  • the CSI reported by the terminal device may be changed in real time. Once the channel is changed, the terminal device may trigger a new CSI report or update the CSI of the currently reported beam, thereby improving the accuracy of the CSI report.
  • the foregoing moments are all pre-configured CSI reporting times, and the second moment is after the first moment, the third moment is after the second moment, and the fourth moment is after the third moment.
  • the data transmission method in the embodiment of the present application by setting a flag bit to indicate the CSI reporting type at the current time, enables the network device or the terminal device to adjust the CSI reported at the current time according to the actual situation, so as to meet the ever-changing demand of the channel. Thereby improving the flexibility of CSI reporting.
  • the data transmission method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 2 .
  • the terminal device and the network device according to the embodiment of the present application will be described in detail below with reference to FIG. 3 to FIG. 6 .
  • FIG. 3 shows a terminal device 300 provided by an embodiment of the present application.
  • the terminal device 300 includes: a determining unit 310 and a transceiver unit 320.
  • the determining unit 310 is configured to determine a reporting type of the channel state information CSI, where the reporting type is used to indicate that between the CSI of the beam currently reported by the terminal device and the CSI of the historically reported beam in the current reporting period. Relationship;
  • the transceiver unit 320 is configured to send CSIs of N beams to the network device according to the report type and the codebook parameter, where the codebook parameter is used to indicate that the number of the currently reported beams N, N is greater than Or an integer equal to 1.
  • the terminal device negotiates the CSI reporting type with the network device, and the terminal device can send the CSI corresponding to the negotiated reporting type to the network device, so that the network device or the terminal device can perform the current situation according to the actual situation.
  • the CSI that is reported at any time is adjusted to meet the ever-changing needs of the channel, thereby improving the flexibility of CSI reporting and improving system performance.
  • the reporting type is any one of the following types: a first type, a second type, and a third type, where the first type is used to indicate that the currently reported CSI is a new reporting period.
  • the second type is used to indicate that the currently reported CSI is the incremental information of the CSI of the historically reported beam
  • the third type is used to indicate that the currently reported CSI is the historical report. Update information of the CSI of the beam.
  • the determining unit 310 is further configured to: after the CSI of the N beams is sent to the network device according to the reporting type and the codebook parameter, determine the codebook parameter; The type and the codebook parameter determine the N beams that are currently reported.
  • the determining unit 310 is specifically configured to: if the reporting type is the first type, determine CSI reporting to start a new reporting period, and determine, to the N beams, N beams corresponding to the CSI; The reporting type is a second type, and the beams corresponding to the N CSIs in the CSI that are not reported in the current reporting period are determined as the N beams; if the reporting type is the third type, the The beams corresponding to the N CSIs that need to be updated in the CSI that have been reported in the current reporting period are determined as the N beams.
  • the determining unit 310 is specifically configured to: determine, according to a downlink channel state, the report type; the transceiver unit 320 is further configured to: send, according to the report type, the network device to indicate the Report type flag.
  • the transceiver unit 320 is further configured to: when the reporting type is the first type or the second type, receive a flag bit sent by the network device, where the flag bit is used to
  • the reporting unit 310 is configured to: determine the reporting type according to the flag bit.
  • the transceiver unit 320 is further configured to: after the CSI of the N beams is sent to the network device according to the reporting type and the codebook parameter, the reporting type is the first type or In the case of the second type, the codebook parameter sent by the network device is received.
  • the transceiver unit 320 is further configured to: after the determining the codebook parameter, send the codebook parameter to the network device.
  • the terminal device 300 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 300 may be specifically the terminal device in the foregoing embodiment, and the terminal device 300 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. 4 shows a network device 400 provided by an embodiment of the present application.
  • the network device 400 includes: a determining unit 410 and a transceiver unit 420.
  • the determining unit 410 is configured to determine a reporting type of the channel state information CSI of the terminal device, where the reporting type is used to indicate the CSI of the beam currently reported by the terminal device and the historically reported beam in the current reporting period.
  • the transceiver unit 420 is configured to receive CSIs of N beams sent by the terminal device, where N is an integer greater than or equal to 1;
  • the determining unit 410 is further configured to:
  • the current channel state of the downlink channel is determined according to the codebook parameter, the reporting type, and the CSI of the N beams, where the codebook parameter is used to indicate the number N of beams currently reported by the terminal device.
  • the terminal device and the network device negotiate the CSI report type, and the terminal device can send the CSI corresponding to the negotiated report type to the network device, so that the network device or the terminal device can perform the current situation according to the actual situation.
  • the CSI that is reported at any time is adjusted to meet the ever-changing needs of the channel, thereby improving the flexibility of CSI reporting and improving system performance.
  • the reporting type is any one of the following types: a first type, a second type, and a third type, where the first type is used to indicate that the currently reported CSI is a new reporting period.
  • the second type is used to indicate that the currently reported CSI is the incremental information of the CSI of the historically reported beam
  • the third type is used to indicate that the currently reported CSI is the historical report. Update information of the CSI of the beam.
  • the determining unit 410 is specifically configured to: if the reporting type is the first type, determine that the terminal device starts a new reporting period, and determine the current channel state according to CSIs of the N beams; If the reporting type is the second type, the CSI of the N beams is aggregated with the CSI of the reported beam in the current reporting period to obtain the current channel state; The CSI of the N beams that have been reported in the current reporting period is updated to the CSI of the N beams currently reported by the terminal device, and the current channel state is determined according to the CSI of the updated beam. .
  • the determining unit 410 is configured to determine, according to the CSI of the historically reported beam, the reporting type, in a case that the reporting type is the first type or the second type;
  • the transceiver unit 420 is further configured to: send, according to the reporting type, a flag bit for indicating the reporting type to the terminal device.
  • the transceiver unit 420 is further configured to: receive a flag bit sent by the terminal device, where the flag bit is used to indicate the report type;
  • the determining unit 410 is specifically configured to: determine the report type according to the flag bit.
  • the determining unit 410 is further configured to: after determining the current channel state of the downlink channel according to the codebook parameter, the reporting type, and the CSI of the N beams, determining the codebook parameter;
  • the transceiver unit 420 is further configured to: send the codebook parameter to the terminal device if the reporting type is the first type or the second type.
  • the transceiver unit 420 is further configured to: before the determining, according to the codebook parameter, the reporting type, and the CSI of the N beams, determining a current channel state of the downlink channel, receiving, by the terminal device, The codebook parameter.
  • the network device 400 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 network device 400 may be specifically the network device in the foregoing embodiment, and the network device 400 may be used to perform various processes and/or corresponding to the network device in the foregoing method embodiments. Steps, to avoid repetition, will not be repeated here.
  • FIG. 5 shows another network device 500 provided by an embodiment of the present application.
  • the network device 500 includes a processor 510, a transceiver 520, and a memory 530.
  • the processor 510, the transceiver 520, and the memory 530 communicate with each other through an internal connection path.
  • the memory 530 is configured to store instructions, and the processor 510 is configured to execute instructions stored in the memory 530 to control the transceiver 520 to send signals and / or receive signals.
  • the processor 510 When the program instructions stored in the memory 530 are executed by the processor 510, the processor 510 is configured to determine a reporting type of the channel state information CSI of the terminal device, where the reporting type is used to indicate that the terminal device is in the current reporting period.
  • the CSI of the currently reported beam and the CSI of the historically reported beam receiving, by the transceiver 520, the CSI of the N beams sent by the terminal device, where N is an integer greater than or equal to 1; the processor 510 further And determining, according to the codebook parameter, the reporting type, and the CSI of the N beams, a current channel state of the downlink channel, where the codebook parameter is used to indicate the number N of beams currently reported by the terminal device.
  • the processor 510 and the memory 530 may be combined to form a processing device, and the processor 510 is configured to execute the program code stored in the memory 530 to implement the above functions.
  • the memory 530 may also be integrated in the processor 510 or independent of the processor 510 when implemented.
  • the network device 500 may further include an antenna 540, configured to send downlink data or downlink control signaling output by the transceiver 520 by using a wireless signal.
  • the network device 500 may be specifically the network device in the foregoing embodiment 200, and may be used to perform various steps and/or processes corresponding to the network device in the foregoing method embodiment 200.
  • the memory 530 can include read only memory and random access memory and provides 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 510 can be configured to execute instructions stored in a memory, and when the processor 510 executes instructions stored in the memory, the processor 510 is configured to perform the various steps of the method embodiments corresponding to the network device described above and/or Or process.
  • FIG. 6 shows another terminal device 600 provided by an embodiment of the present application.
  • the terminal device 600 includes a processor 601 and a transceiver 602.
  • the terminal device 600 further includes a memory 603.
  • the processor 602, the transceiver 602 and the memory 603 communicate with each other through an internal connection path for transferring control and/or data signals
  • the memory 603 is for storing a computer program
  • the processor 601 is used for the memory 603.
  • the computer program is called and executed to control the transceiver 602 to send and receive signals.
  • the processor 601 When the program instruction stored in the memory 603 is executed by the processor 601, the processor 601 is configured to determine a reporting type of the channel state information CSI, where the reporting type is used to indicate the CSI of the currently reported beam in the current reporting period.
  • the relationship between the CSIs of the historically reported beams; the CSIs of the N beams are transmitted to the network device by the transceiver 602 according to the reporting type and the codebook parameters, where the codebook parameters are used to indicate the currently reported beams.
  • the number N, N is an integer greater than or equal to 1.
  • the above processor 601 and memory 603 can synthesize a processing device, and the processor 601 is configured to execute the program code stored in the memory 603 to implement the above functions.
  • the memory 603 may also be integrated in the processor 601 or independent of the processor 601.
  • the terminal device 600 may further include an antenna 604, configured to send uplink data or uplink control signaling output by the transceiver 602 by using a wireless signal.
  • the terminal device 600 may be specifically the terminal device in the foregoing embodiment 200, and may be used to perform various steps and/or processes corresponding to the terminal device in the foregoing method embodiment 200.
  • the memory 630 can include read only memory and random access memory and provides 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 610 can be configured to execute instructions stored in a memory, and when the processor 610 executes instructions stored in the memory, the processor 610 is configured to perform the various steps of the method embodiment corresponding to the terminal device described above and/or Or process.
  • the above-mentioned processor 601 can be used to perform the actions implemented by the terminal internally described in the foregoing method embodiments, and the transceiver 602 can be used to perform the actions of the terminal to transmit or transmit to the terminal device described in the foregoing method embodiments.
  • the transceiver 602 can be used to perform the actions of the terminal to transmit or transmit to the terminal device described in the foregoing method embodiments.
  • the terminal device 600 described above may also include a power source 606 for providing power to various devices or circuits in the terminal device 600.
  • the terminal device 600 may further include one or more of an input unit 606, a display unit 607, an audio circuit 608, a camera 609, a sensor 610, and the like, the audio circuit.
  • an input unit 606 a display unit 607
  • an audio circuit 608 a camera 609
  • a sensor 610 a sensor
  • the terminal device 600 may further include one or more of an input unit 606, a display unit 607, an audio circuit 608, a camera 609, a sensor 610, and the like, the audio circuit.
  • a speaker 6082, a microphone 6084, and the like can also be included.
  • the foregoing network device 500 and the processor of the terminal device 600 may be a central processing unit (CPU), and the processor may also be other general-purpose processors and digital signal processors ( DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like.
  • 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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Abstract

本申请实施例提供了一种数据传输方法、终端设备和网络设备，该方法包括：终端设备确定信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；所述终端设备根据所述上报类型以及所述码本参数，向网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数。本申请实施例的数据传输方法、终端设备和网络设备，能够提高CSI上报的灵活性，从而提高系统性能。

Description

数据传输方法、终端设备和网络设备
本申请要求于2017年05月05日提交中国专利局、申请号为201710310753.6、申请名称为“数据传输方法、终端设备和网络设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信领域，特别涉及通信领域中的数据传输的方法、终端设备和网络设备。
背景技术
多输入多输出(multiple-user multiple-input multiple-output，MIMO)技术是是指在发送端和接收端分别使用多根发射天线和接收天线，使信号通过发送端与接收端的多根天线传送和接收。随着多天线技术的发展，大规模天线阵列(Massive MIMO)成为提高系统容量的有效手段，在Massive MIMO系统中，网络设备可以配置几十甚至几百根天线，能够同时向几十个用户利用同时同频资源发送不同数据流，实现频谱效率的显著提升。
信道状态信息(channel state information，CSI)用于表示通信链路的信道属性，网络设备获取的CSI的准确性在很大程度上决定了Massive MIMO系统的性能。一般情况下，在频分双工(frequency division duplexing，FDD)系统或信道互易性不能很好满足的时分双工(time division duplexing，TDD)系统中，终端设备需要评估CSI，采用码本将其量化，并上报给网络设备。为了实现高精度的CSI上报(CSI reporting)，可以采用波束叠加(beam combination)上报技术，终端设备可以将多个码字进行加权叠加，弥补单个码字的精度损失。
采用波束叠加上报技术时，需要上报多个波束位置信息及其系数量化信息，开销很大。目前一种典型的降低反馈开销的方法，通过将CSI进行分级上报的方式，来降低开销。采用波束叠加上报技术时，终端设备将需要上报的多个波束的CSI，分成T个时刻进行上报，每次上报N个波束的CSI，最后对L＝T*N个波束的CSI进行聚合，得到最终的CSI信息，其中T和N均为大于0的整数。由于在现有的CSI分级上报方法中，T个时刻分别上报哪些波束的CSI是提前配置好的，网络设备和终端设备无法改变CSI上报的内容，如何提高CSI上报的灵活性成为一项亟待解决的技术问题。
发明内容
本申请实施例提供的数据传输方法、终端设备和网络设备，能够提高CSI上报的灵活性，从而提高系统性能。
第一方面，提供了一种数据传输方法，包括：终端设备确定信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI 与历史上报的波束的CSI之间的关系；所述终端设备根据所述上报类型以及所述码本参数，向网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数。
具体地，网络设备可以向终端设备发送参考信号，对信道状态进行测量，终端设备在接收到该网络设备发送的参考信号之后，可以向该网络设备反馈至少一个波束的CSI，该网络设备对接收到的波束的CSI进行处理，获得测量结果。可选的，该参考信号可以为信道状态信息参考信号(channel state information reference signal，CSI-RS)，但本申请实施例对此不作限定。
在本申请实施例中，在终端设备向网络设备上报CSI之前，需要终端设备和网络设备确定CSI的上报类型，该上报类型用于表示在当前上报周期内，该终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系。此外，该终端设备和网络设备还可以确定用于指示当前上报的波束的个数N的码本参数。该码本参数可以是预先约定的，也可以是在每次CSI上报之前由网络设备和终端设备协商的，本申请实施例对此不作限定。该终端设备根据已经确定的CSI的上报类型以及码本参数，选择N个波束的CSI，并向该网络设备反馈该N个波束的CSI。网络设备接收终端设备反馈的N个波束的CSI，根据该CSI的上报类型确定测量结果，即下行信道的当前信道状态。
本申请实施例的数据传输方法，通过终端设备与网络设备协商CSI的上报类型，该终端设备可以向该网络设备发送与协商的上报类型对应的CSI，能够使网络设备或终端设备根据实际情况对当前时刻上报的CSI进行调整，以满足信道不断变化的需求，从而提高CSI上报的灵活性，提高系统性能。
在第一方面的第一种可能的实现方式中，所述上报类型为下列类型中的任意一种：第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
具体地，在本文中，上述第一类型、第二类型以及第三类型可以分别称为独立类型、增强类型以及更新类型。其中，独立类型用于表示终端设备开始新的CSI的上报，若信道状态发生了改变或是网络设备需要指示终端设备重新发起CSI的上报，该终端设备本次上报CSI对应的上报类型可以为独立类型；增强类型用于表示终端设备在当前时刻上报的CSI为历史上报的CSI的增量信息，即该终端设备已经上报了基本CSI的信息，当前上报的为增强CSI的信息，用于对基本CSI的信息进行补充，提高CSI的上报精度；更新类型用于表示终端设备需要对历史上报的部分CSI进行更新，若信道发生部分改变，该终端设备本次上报CSI对应的上报类型可以为更新类型。
基于上述不同的上报类型，终端设备上报的CSI可以实时进行改变。在信道没有变化的情况下，该终端设备可以上报基本CSI的信息，并在此基础之上，上报增强CSI的信息，同时指示网络设备对应的上报类型为增强类型，从而提高CSI的上报精度；一旦信道发生改变，该终端设备可以触发新的CSI上报，或者对当前已经上报的波束的CSI进行更新，同时指示网络设备对应的上报类型为独立类型或更新类型，从而提高CSI上报的准确性。
结合第一方面的上述可能的实现方式，在第一方面的第二种可能的实现方式中，所述 终端设备根据所述上报类型以及所述码本参数，向网络设备发送N个波束的CSI之前，所述方法还包括：所述终端设备确定所述码本参数；所述终端设备根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束。
具体地，该终端设备在每次上报CSI之前，需要确定当前时刻采用哪些波束进行CSI上报。该终端设备可以根据码本参数确定当前时刻需要上报的CSI的个数，再根据上报类型，确定具体需要上报CSI所采用的波束。
结合第一方面的上述可能的实现方式，在第一方面的第三种可能的实现方式中，所述终端设备根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束，包括：若所述上报类型为第一类型，所述终端设备确定开始新的上报周期的CSI上报，并将N个CSI对应的波束确定为所述N个波束；若所述上报类型为第二类型，所述终端设备将所述当前上报周期中未上报过的CSI中的N个CSI对应的波束确定为所述N个波束；若所述上报类型为第三类型，所述终端设备将所述当前上报周期中已上报过的CSI中需要更新的N个CSI对应的波束确定为所述N个波束。
应理解，上述CSI的上报类型是在终端设备每次上报CSI之前，由网络设备与终端设备共同协商好的，即该网络设备与该终端设备确定的CSI的上报类型必须一致，这样才能保证网络设备对终端设备上报的CSI进行正确地处理。在本申请实施例中，网络设备和终端设备可以采用多种方式确定CSI的上报类型，具体地，该上报类型可以由终端设备确定，并通知网络设备，也可以由网络设备确定，并通知终端设备，本申请实施例对此不作限定。
结合第一方面的上述可能的实现方式，在第一方面的第四种可能的实现方式中，所述终端设备确定信道状态信息CSI的上报类型，包括：所述终端设备根据下行信道状态，确定所述上报类型；所述方法还包括：所述终端设备根据所述上报类型，向所述网络设备发送用于指示所述上报类型的标志位。
具体地，该终端设备可以根据下行信道状态，确定上述上报类型，例如，若下行信道发生较大变化，该终端设备可以确定该上报类型为第一类型，若下行信道并未发生变化，该终端设备可以确定该上报类型为第二类型，若下行信道发生较小改变，该终端设备可以确定该上报类型为第三类型。在确定了上报类型之后，该终端设备可以向网络设备发送该上报类型，网络设备接收该终端设备发送的该上报类型，从而确定该终端设备本次上报的CSI的上报类型，并对其进行正确地处理。
在一种可能的实现方式中，该终端设备可以通过向该网络设备发送标志位，来指示本次上报的CSI的上报类型，该标志位与上述上报类型之间具有预设的对应关系。
结合第一方面的上述可能的实现方式，在第一方面的第五种可能的实现方式中，在所述终端设备根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI之前，所述方法还包括：在所述上报类型为所述第一类型或所述第二类型的情况下，所述终端设备接收所述网络设备发送的标志位，所述标志位用于指示所述上报类型；所述终端设备根据所述标志位，确定所述上报类型。
具体地，该网络设备可以根据该终端设备在当前上报周期中历史上报的波束的CSI，确定上述上报类型，例如，若该网络设备确定历史上报的CSI无用，需要开始新的CSI上报，该网络设备可以确定该上报类型为第一类型，若该网络设备确定历史上报的CSI不够精确，该网络设备可以确定该上报类型为第二类型。在确定了上报类型之后，该网络 设备可以向终端设备发送该上报类型，该终端设备接收该网络设备发送的该上报类型，从而确定该终端设备本次上报的CSI的上报类型，并选择正确的CSI进行上报。
在一种可能的实现方式中，该网络设备可以通过向该终端设备发送标志位，来指示本次上报的CSI的上报类型，该标志位与上述上报类型之间具有预设的对应关系。
结合第一方面的上述可能的实现方式，在第一方面的第六种可能的实现方式中，所述终端设备确定码本参数，包括：在所述上报类型为所述第一类型或所述第二类型的情况下，所述终端设备接收所述网络设备发送的所述码本参数。
结合第一方面的上述可能的实现方式，在第一方面的第七种可能的实现方式中，在所述终端设备确定码本参数之后，所述方法还包括：所述终端设备向所述网络设备发送所述码本参数。
具体地，在采用码本方式上报CSI的情况下，终端设备和网络设备不仅需要确定当前CSI的上报类型，还需要确定当前上报CSI所采用的码本参数。码本参数可以由网络设备确定，并通知终端设备，也可以由终端设备确定，并通知网络设备，本申请实施例对此不作限定。
应理解，只有在上述上报类型为第一类型或第二类型的情况下，网络设备才可以主动更改CSI的上报内容，即主动确定CSI的上报类型以及码本参数，并将其发送给终端设备。而在上报类型为更新类型的情况下，由于网络设备无法获知信道状态，只有终端设备可以主动发起对第三类型的CSI的上报，在这种情况下，第三类型对应的码本参数也只能由该终端设备确定，并通知该网络设备。
结合第一方面的上述可能的实现方式，在第一方面的第八种可能的实现方式中，所述CSI包括下列信息中的至少一种：预编码矩阵指示PMI、秩指示RI和信道质量指示CQI。
第二方面，提供了另一种数据传输方法，包括：网络设备确定终端设备的信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；所述网络设备接收所述终端设备发送的N个波束的CSI，N为大于或等于1的整数；所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态，所述码本参数用于指示所述终端设备当前上报的波束的个数N。
本申请实施例的数据传输方法，通过终端设备与网络设备协商CSI的上报类型，该终端设备可以向该网络设备发送与协商的上报类型对应的CSI，能够使网络设备或终端设备根据实际情况对当前时刻上报的CSI进行调整，以满足信道不断变化的需求，从而提高CSI上报的灵活性，提高系统性能。
在第二方面的第一种可能的实现方式中，所述上报类型为下列类型中的任意一种：第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
结合第二方面的上述可能的实现方式，在第二方面的第二种可能的实现方式中，所述网络设备根据所述上报类型、所述码本参数以及所述N个波束的CSI，确定下行信道的当前信道状态，包括：若所述上报类型为第一类型，所述网络设备确定所述终端设备开始新 的上报周期，并根据所述N个波束的CSI确定所述当前信道状态；若所述上报类型为第二类型，所述网络设备将所述N个波束的CSI与所述当前上报周期内已上报过的波束的CSI进行聚合处理，获得所述当前信道状态；若所述上报类型为第三类型，所述网络设备将所述当前上报周期内已上报过的N个波束的CSI更新为所述终端设备当前上报的所述N个波束的CSI，并根据更新后的波束的CSI确定所述当前信道状态。
结合第二方面的上述可能的实现方式，在第二方面的第三种可能的实现方式中，所述网络设备确定终端设备的信道状态信息CSI的上报类型，包括：在所述上报类型为所述第一类型或所述第二类型的情况下，所述网络设备根据所述历史上报的波束的CSI，确定所述上报类型；所述方法还包括：所述网络设备根据所述上报类型，向所述终端设备发送用于指示所述上报类型的所述标志位。
结合第二方面的上述可能的实现方式，在第二方面的第四种可能的实现方式中，所述网络设备确定终端设备的信道状态信息CSI的上报类型，包括：所述网络设备接收所述终端设备发送的标志位，所述标志位用于指示所述上报类型；所述网络设备根据所述标志位，确定所述上报类型。
结合第二方面的上述可能的实现方式，在第二方面的第五种可能的实现方式中，在所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，所述方法还包括：所述网络设备确定所述码本参数；在所述上报类型为所述第一类型或所述第二类型的情况下，所述网络设备向所述终端设备发送所述码本参数。
结合第二方面的上述可能的实现方式，在第二方面的第六种可能的实现方式中，在所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，所述方法还包括：所述网络设备接收所述终端设备发送的所述码本参数。
结合第二方面的上述可能的实现方式，在第二方面的第七种可能的实现方式中，所述CSI包括下列信息中的至少一种：预编码矩阵指示PMI、秩指示RI和信道质量指示CQI。
第三方面，提供了一种终端设备，用于执行第一方面或第一方面任意可能的实现方式中的方法。具体地，该终端设备包括用于执行上述第一方面或第一方面的任一种可能的实现方式中的方法的单元。
第四方面，提供了一种网络设备，用于执行第二方面或第二方面任意可能的实现方式中的方法。具体地，该网络设备包括用于执行上述第二方面或第二方面的任一种可能的实现方式中的方法的单元。
第五方面，提供了一种终端设备，该终端设备包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该终端设备执行第一方面或第一方面的任一种可能的实现方式中的方法。
第六方面，提供了一种网络设备，该网络设备包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，该执行使得该网络设备执行第二方面或第二方面的任一种可能的实现方式中的方法。
第七方面，提供了一种数据传输系统，该系统包括上述第三方面或第三方面的任一种可能实现方式中的终端设备以及第四方面或第四方面中的任一种可能实现方式中的网络设备；或者
该系统包括上述第五方面或第五方面的任一种可能实现方式中的终端设备以及第六方面或第六方面中的任一种可能实现方式中的网络设备。
第八方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被终端设备运行时，使得所述终端设备执行上述第一方面或第一方面任一种可能实现方式中的方法。
第九方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被网络设备运行时，使得所述网络设备执行上述第二方面或第二方面任一种可能实现方式中的方法。
第十方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的指令。
第十一方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的指令。
附图说明
图1示出了本申请实施例的通信系统的示意图。
图2示出了根据本申请实施例的数据传输方法的示意性流程图。
图3示出了根据本申请实施例的终端设备的示意性框图。
图4示出了根据本申请实施例的网络设备的示意性框图。
图5示出了根据本申请实施例的另一网络设备的示意性框图。
图6示出了根据本申请实施例的另一终端设备的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system of mobile communication，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、以及未来的5G通信系统等。
还应理解，本申请实施例的技术方案还可以应用于各种基于非正交多址接入技术的通信系统，例如稀疏码多址接入(sparse code multiple access，SCMA)系统，当然SCMA在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输系统，例如采用非正交多址接入技术正交频分复用(orthogonal frequency division multiplexing，OFDM)、滤波器组多载波(filter bank  multi-carrier，FBMC)、通用频分复用(generalized frequency division multiplexing，GFDM)、滤波正交频分复用(filtered-OFDM，F-OFDM)系统等。
还应理解，在本申请实施例中，终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，该终端设备可称为接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
还应理解，在本申请实施例中，网络设备可用于与终端设备通信，该网络设备可以是GSM系统或CDMA系统中的基站(base transceiver station，BTS)，也可以是WCDMA系统中的基站(node B，NB)，还可以是LTE系统中的演进型基站(evolutional node B，eNB或eNode B)，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备、未来5G网络中的网络侧设备或者未来演进的PLMN网络中的网络设备等。
本申请实施例可以适用于LTE系统以及后续的演进系统如5G等，或其他采用各种无线接入技术的无线通信系统，如采用码分多址，频分多址，时分多址，正交频分多址，单载波频分多址等接入技术的系统，尤其适用于需要信道信息反馈和/或应用二级预编码技术的场景，例如应用Massive MIMO技术的无线网络、应用分布式天线技术的无线网络等。
应理解，多输入输出(multiple-input multiple-output，MIMO)技术是指在发送端设备和接收端设备分别使用多个发射天线和接收天线，使信号通过发送端设备与接收端设备的多个天线传送和接收，从而改善通信质量。它能充分利用空间资源，通过多个天线实现多发多收，在不增加频谱资源和天线发射功率的情况下，可以成倍地提高系统信道容量。
MIMO可以分为单用户多输入多输出(single-user MIMO，SU-MIMO)和多用户多输入多输出(multi-user MIMO，MU-MIMO)。Massive MIMO基于多用户波束成形的原理，在发送端设备布置几百根天线，对几十个目标接收机调制各自的波束，通过空间信号隔离，在同一频率资源上同时传输几十条信号。因此，Massive MIMO技术能够充分利用大规模天线配置带来的空间自由度，提升频谱效率。
图1是本申请实施例所用的通信系统的示意图。如图1所示，该通信系统100包括网络设备102，网络设备102可包括多个天线组。每个天线组可以包括一个或多个天线，例如，一个天线组可包括天线104和106，另一个天线组可包括天线108和110，附加组可包括天线112和114。图1中对于每个天线组示出了2个天线，然而可以对于每个组使用更多或更少的天线。网络设备102可附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件，例如处理器、调制器、复用器、解调器、解复用器或天线等。
网络设备102可以与多个终端设备通信，例如，网络设备102可以与终端设备116和终端设备122通信。然而，可以理解，网络设备102可以与类似于终端设备116或122的任意数目的终端设备通信。终端设备116和122可以是例如蜂窝电话、智能电话、便携式 电脑、手持通信设备、手持计算设备、卫星无线电装置、全球定位系统、PDA和/或用于在无线通信系统100上通信的任意其它适合设备。
如图1所示，终端设备116与天线112和114通信，其中天线112和114通过前向链路118向终端设备116发送信息，并通过反向链路120从终端设备116接收信息。此外，终端设备122与天线104和106通信，其中天线104和106通过前向链路124向终端设备122发送信息，并通过反向链路126从终端设备122接收信息。
例如，在频分双工FDD系统中，例如，前向链路118可利用与反向链路120所使用的不同频带，前向链路124可利用与反向链路126所使用的不同频带。
再例如，在时分双工TDD系统和全双工(full duplex)系统中，前向链路118和反向链路120可使用共同频带，前向链路124和反向链路126可使用共同频带。
被设计用于通信的每组天线和/或区域称为网络设备102的扇区。例如，可将天线组设计为与网络设备102覆盖区域的扇区中的终端设备通信。在网络设备102通过前向链路118和124分别与终端设备116和122进行通信的过程中，网络设备102的发射天线可利用波束成形来改善前向链路118和124的信噪比。此外，与网络设备通过单个天线向它所有的终端设备发送信号的方式相比，在网络设备102利用波束成形向相关覆盖区域中随机分散的终端设备116和122发送信号时，相邻小区中的移动设备会受到较少的干扰。
在给定时间，网络设备102、终端设备116或终端设备122可以是无线通信发送装置和/或无线通信接收装置。当发送数据时，无线通信发送装置可对数据进行编码以用于传输。具体地，无线通信发送装置可获取要通过信道发送至无线通信接收装置的一定数目的数据比特，例如，无线通信发送装置可生成、从其它通信装置接收、或在存储器中保存等要通过信道发送至无线通信接收装置的一定数目的数据比特。这种数据比特可包含在数据的传输块或多个传输块中，传输块可被分段以产生多个码块。
此外，该通信系统100可以是公共陆地移动网络PLMN网络或者设备对设备(device to device，D2D)网络或者机器对机器(machine to machine，M2M)网络或者其他网络，图1仅为便于理解而示例的简化示意图，网络中还可以包括其他网络设备，图1中未予以画出。
图2示出了本申请实施例的数据传输方法的示意性流程图200。该方法200可以应用于图1所示的通信系统100，但本申请实施例不限于此。
S210，终端设备确定信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
S220，网络设备确定所述终端设备的信道状态信息CSI的上报类型；
S230，所述终端设备根据所述上报类型以及码本参数，向所述网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数；
则对应地，所述网络设备接收所述终端设备发送的N个波束的CSI；
S240，所述网络设备根据所述上报类型、所述码本参数以及所述N个波束的CSI，确定下行信道的当前信道状态。
基于码本的波束成形技术，其码本的选择主要依赖于信道状态信息CSI。在时变缓慢的时分双工TDD系统中，利用信道的对偶特性，网络设备可以根据上行信道估计来获得 下行CSI。然而，在频分复用FDD系统或信道互易性不好的时分双工TDD系统中，由于上下行信道不对称，下行CSI只能通过终端设备进行估计，然后利用上行信道进行反馈。具体地，网络设备可以向终端设备发送参考信号，对信道状态进行测量，终端设备在接收到该网络设备发送的参考信号之后，可以向该网络设备反馈至少一个波束的CSI，该网络设备对接收到的波束的CSI进行处理，获得测量结果。
作为一个可选的实施例，该参考信号可以为信道状态信息参考信号(channel state information reference signal，CSI-RS)，但本申请实施例对此不作限定。
在本申请实施例中，在终端设备向网络设备上报CSI之前，需要终端设备和网络设备确定CSI的上报类型，该上报类型用于表示在当前上报周期内，该终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系。此外，该终端设备和网络设备还可以确定用于指示当前上报的波束的个数N的码本参数。该码本参数可以是预先约定的，也可以是在每次CSI上报之前由网络设备和终端设备协商的，本申请实施例对此不作限定。该终端设备根据已经确定的CSI的上报类型以及码本参数，选择N个波束的CSI，并向该网络设备反馈该N个波束的CSI。网络设备接收终端设备反馈的N个波束的CSI，根据该CSI的上报类型确定测量结果，即下行信道的当前信道状态。
现有的CSI分级上报方法中，在CSI上报之前，网络设备和终端设备可以提前配置好在接下来的T个时刻需要上报的波束信息，即在一个上报周期内，可以为终端设备预配置CSI的多个上报时刻以及每个时刻上报的波束信息。由于T个时刻分别上报哪些波束的CSI是提前配置好的，网络设备和终端设备无法改变CSI上报的内容。
而本申请实施例的数据传输方法，通过终端设备与网络设备协商CSI的上报类型，该终端设备可以向该网络设备发送与协商的上报类型对应的CSI，能够使网络设备或终端设备根据实际情况对当前时刻上报的CSI进行调整，以满足信道不断变化的需求，从而提高CSI上报的灵活性，提高系统性能。
在一种实现方式中，基于波束叠加机制的高精度CSI反馈，用于表示终端设备反馈的CSI的码本可以表示为两级码本结构，通常表示为：
W＝W 1×W 2
其中，W 1＝[b 1 b 2 … b K]表示从码本中选择的基底(波束beam)，总个数为K，W 2表示对应基底的系数，可以表示为：
Figure PCTCN2018085439-appb-000001
α ij为系数，用于表示幅度信息和相位信息，i∈{1,…,K}，j∈{1,…,L}，L为用户信号的传输层数。
下面结合如下所述的两级码本结构为例进行说明。
Figure PCTCN2018085439-appb-000002
其中，b i用于表示使用波束叠加机制时当前反馈的CSI所选取的波束beam，c j为系数，主要包括幅度信息和相位信息，p j为用于辅助指示系数的幅度信息。
应理解，采用双码本结构的好处是可以降低开销，p j为宽带长期参数，可以在整个上行带宽上保持一致，可以以较长周期通知一次，而c j为子带短期参数，可以在窄带上以较短的周期通知一次，但本申请实施例对此不作限定。
具体地，终端设备可以将上述CSI的码本W拆分成两级CSI进行上报，如下所示：
Figure PCTCN2018085439-appb-000003
基于波束b 0和b 1上报的CSI可以称为基本CSI的信息，基于波束b 2和b 3上报的CSI的信息可以称为增强CSI的信息。
应理解，用于上报基本CSI的至少一个波束为所有波束的CSI中信息量最大的CSI对应的波束，因此，基本CSI包括了本次测量获得的CSI的主要信息。若用于上报基本CSI的波束为一个，则该波束即为波束选择(beam selection)的上报技术中的最优波束，此处不再赘述。而用于上报增强CSI的至少一个波束，可以由终端设备在除了用于上报基本CSI的波束之外的剩余波束中选择，目的是对基本CSI的信息进行补充，从而使得网络设备可以获得更高精度的CSI，CSI反馈质量可以得到显著提升。
因此，在CSI的分级上报技术中，终端设备可以先上报基本CSI，再上报增强CSI，随着终端设备上报的CSI越来越多，提高CSI的上报精度，提高网络设备测量信道状态的准确性。
采用CSI分级上报时，终端设备可以在不同时刻上报一部分CSI的信息，例如，该终端设备可以在T 0时刻上报基本CSI的信息，在T 0+ΔT时刻上报第一增强CSI的信息，在T 0+2*ΔT时刻上报第二增强CSI的信息，以此类推，直到上报完所有CSI信息为止。但是，由于信道会随时发生改变，终端设备在T 0时刻上报基本CSI的信息是准确的，假设信道在T 0时刻至T 0+ΔT时刻之间发生了变化，该终端设备在T 0+ΔT时刻上报第一增强CSI的信息就不准确了，这样，继续上报第一增强CSI的信息以及第二增强CSI的信息便没有意义，反而会导致网络设备最终确定的CSI不能准确反映出信道状态。
而现有的CSI分级上报方法中，网络设备和终端设备是提前配置好在接下来的多个时刻需要上报的波束信息的，网络设备和终端设备不能改变每个时刻的CSI上报内容。有鉴于此，本申请实施例提出了CSI的上报类型的概念，使每个时刻的CSI上报内容不再固定，可以灵活改变CSI上报的内容。
考虑到在CSI分级上报的过程中，可能出现信道发生改变或其他情况需要终端设备重新进行CSI的上报，下面定义了三种CSI的上报类型，但应理解，CSI的上报类型还可以为其他类型，本申请实施例不限于此。
作为一个可选的实施例，所述上报类型为下列类型中的任意一种：
第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
具体地，CSI的上报类型可以包括第一类型、第二类型以及第三类型。在本文中，为了便于理解，将第一类型称为独立类型，第二类型称为增强类型，第三类型称为更新类型。但应理解，这并不会对本申请实施例的保护范围构成任何限定。其中，独立类型用于表示终端设备开始新的CSI的上报，若信道状态发生了改变或是网络设备需要指示终端设备重新发起CSI的上报，该终端设备本次上报CSI对应的上报类型可以为独立类型；增强类型用于表示终端设备在当前时刻上报的CSI为历史上报的CSI的增量信息，即该终端设备已经上报了基本CSI的信息，当前上报的为增强CSI的信息，用于对基本CSI的信息进行补充，提高CSI的上报精度；更新类型用于表示终端设备需要对历史上报的部分CSI进行更新，若信道发生部分改变，该终端设备本次上报CSI对应的上报类型可以为更新类型。
基于上述不同的上报类型，终端设备上报的CSI可以实时进行改变。在信道没有变化的情况下，该终端设备可以上报基本CSI的信息，并在此基础之上，上报增强CSI的信息，同时指示网络设备对应的上报类型为增强类型，从而提高CSI的上报精度；一旦信道发生改变，该终端设备可以触发新的CSI上报，或者对当前已经上报的波束的CSI进行更新，同时指示网络设备对应的上报类型为独立类型或更新类型，从而提高CSI上报的准确性。
作为一个可选的实施例，所述终端设备根据所述上报类型以及所述码本参数，向网络设备发送N个波束的CSI之前，所述方法还包括：
所述终端设备确定所述码本参数；
所述终端设备根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束。
具体地，该终端设备在每次上报CSI之前，需要确定当前时刻采用哪些波束进行CSI上报。该终端设备可以根据码本参数确定当前时刻需要上报的CSI的个数，再根据上报类型，确定具体需要上报CSI所采用的波束。
作为一个可选的实施例，所述终端设备根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束，包括：
若所述上报类型为第一类型，所述终端设备确定开始新的上报周期的CSI上报，并将N个CSI对应的波束确定为所述N个波束；
若所述上报类型为第二类型，所述终端设备将所述当前上报周期中未上报过的CSI 中的N个CSI对应的波束确定为所述N个波束；
若所述上报类型为第三类型，所述终端设备将所述当前上报周期中已上报过的CSI中需要更新的N个CSI对应的波束确定为所述N个波束。
则对应地，所述网络设备根据所述上报类型、所述码本参数以及所述N个波束的CSI，确定下行信道的当前信道状态，包括：
若所述上报类型为第一类型，所述网络设备确定所述终端设备开始新的上报周期，并根据所述N个波束的CSI确定所述当前信道状态；
若所述上报类型为第二类型，所述网络设备将所述N个波束的CSI与所述当前上报周期内已上报过的波束的CSI进行聚合处理，获得所述当前信道状态；
若所述上报类型为第三类型，所述网络设备将所述当前上报周期内已上报过的N个波束的CSI更新为所述终端设备当前上报的所述N个波束的CSI，并根据更新后的波束的CSI确定所述当前信道状态。
为了便于理解，将第一类型称为独立类型，第二类型称为增强类型，第三类型称为更新类型。具体地，下面针对上述上报类型分为独立类型、增强类型以及更新类型的情况分别进行说明。
(1)独立类型
若CSI的上报类型为独立类型，该终端设备确定需要开始新的上报周期的CSI上报，首先，该终端设备根据码本参数，确定本次需要上报N个波束的CSI，然后，该终端设备将信息量最大的N个CSI对应的波束确定为本次需要上报的N个波束，并向网络设备发送该N个波束的CSI；
对应的，该网络设备接收该终端设备发送的N个波束的CSI，根据本次CSI的上报类型，确定终端设备本次上报的N个波束的CSI为独立类型，该网络设备确定该终端设备开始新的CSI上报，将该N个波束的CSI确定为基本CSI的信息，并进一步确定当前信道状态。
(2)增强类型
若CSI的上报类型为增强类型，该终端设备确定上报增强CSI的信息，首先，该终端设备根据码本参数，确定本次需要上报N个波束的CSI，然后，该终端设备将当前上报周期中未上报过的CSI中信息量最大的N个CSI对应的波束确定为本次需要上报的N个波束，并向网络设备发送该N个波束的CSI；
对应的，该网络设备接收该终端设备发送的N个波束的CSI，根据本次CSI的上报类型，确定终端设备本次上报的N个波束的CSI为增强类型，该网络设备将该N个波束的CSI确定为增强CSI的信息，并进一步结合该终端设备历史上报的基本CSI的信息，确定当前信道状态。
(3)更新类型
若CSI的上报类型为更新类型，该终端设备确定需要对当前上报周期中已上报的部分CSI进行更新，首先，该终端设备根据码本参数，确定本次需要上报N个波束的CSI，然后，该终端设备将当前上报周期中已上报过的CSI中需要更新的N个CSI对应的波束确定为本次需要上报的N个波束，并向网络设备发送该N个波束的CSI；
对应的，该网络设备接收该终端设备发送的N个波束的CSI，根据本次CSI的上报类 型，确定终端设备本次上报的N个波束的CSI为更新类型，该网络设备将当前上报周期内已上报过的N个波束的CSI更新为该终端设备当前上报的该N个波束的CSI，并进一步确定当前信道状态。
应理解，上述CSI的上报类型是在终端设备每次上报CSI之前，由网络设备与终端设备共同协商好的，即该网络设备与该终端设备确定的CSI的上报类型必须一致，这样才能保证网络设备对终端设备上报的CSI进行正确地处理。在本申请实施例中，网络设备和终端设备可以采用多种方式确定CSI的上报类型，具体地，该上报类型可以由终端设备确定，并通知网络设备，也可以由网络设备确定，并通知终端设备，本申请实施例对此不作限定。
作为一个可选的实施例，所述终端设备确定信道状态信息CSI的上报类型，包括：
所述终端设备根据下行信道状态，确定所述上报类型；
所述方法还包括：
所述终端设备根据所述上报类型，向所述网络设备发送用于指示所述上报类型的标志位。
则对应地，所述网络设备确定终端设备的信道状态信息CSI的上报类型，包括：
所述网络设备接收所述终端设备发送的标志位，所述标志位用于指示所述上报类型；
所述网络设备根据所述标志位，确定所述上报类型。
具体地，终端设备可以根据下行信道的变化情况，确定上述上报类型，例如，若下行信道发生较大变化，该终端设备可以确定该上报类型为独立类型，若下行信道并未发生变化，该终端设备可以确定该上报类型为增强类型，若下行信道发生较小改变，该终端设备可以确定该上报类型为更新类型。在确定了上报类型之后，该终端设备可以向网络设备发送该上报类型，网络设备接收该终端设备发送的该上报类型，从而确定该终端设备本次上报的CSI的上报类型，并对其进行正确地处理。
在一种可能的实现方式中，该终端设备可以通过向该网络设备发送标志位，来指示本次上报的CSI的上报类型。具体而言，该标志位与上述上报类型之间具有预设的对应关系，例如，独立类型对应00，增强类型对应01，更新类型对应11等等，终端设备确定了上报类型为独立类型之后，便可以根据上报类型与标志位之间的对应关系，确定标志位为00，并向网络设备发送00，该网络设备在接收到标志位00之后，可以根据上报类型与标志位之间的对应关系，确定该上报类型为独立类型。
应理解，上述采用2比特来表示标志位仅仅是为了进行举例说明，本申请实施例中的标志位还可以采用其他比特或其他字符表示，本申请实施例对此不作限定。
作为一个可选的实施例，所述网络设备确定终端设备的信道状态信息CSI的上报类型，包括：
在所述上报类型为所述第一类型或所述第二类型的情况下，所述网络设备根据所述历史上报的波束的CSI，确定所述上报类型；
在所述网络设备根据所述历史上报的波束的CSI，确定所述上报类型之后，所述方法还包括：
所述网络设备根据所述上报类型，向所述终端设备发送用于指示所述上报类型的标志位。
则对应地，在所述终端设备根据所述上报类型以及码本参数，向网络设备发送N个波 束的CSI之前，所述方法还包括，包括：
所述终端设备接收所述网络设备发送的标志位，所述标志位用于指示所述上报类型；
所述终端设备根据所述标志位，确定所述上报类型。
具体地，网络设备可以根据该终端设备在当前上报周期中历史上报的波束的CSI，确定上述上报类型，例如，若该网络设备确定历史上报的CSI无用，需要开始新的CSI上报，该网络设备可以确定该上报类型为独立类型(即上述第一类型)，若该网络设备确定历史上报的CSI不够精确，该网络设备可以确定该上报类型为增强类型(即上述第二类型)。在确定了上报类型之后，该网络设备可以向终端设备发送该上报类型，该终端设备接收该网络设备发送的该上报类型，从而确定该终端设备本次上报的CSI的上报类型，并选择正确的CSI进行上报。
在一种可能的实现方式中，该网络设备可以通过向该终端设备发送标志位，来指示本次上报的CSI的上报类型。具体而言，该标志位与上述上报类型之间具有预设的对应关系，例如，独立类型对应00，增强类型对应01，更新类型对应11等等，网络设备确定了上报类型为独立类型之后，便可以根据上报类型与标志位之间的对应关系，确定标志位为00，并向终端设备发送00，该终端设备在接收到标志位00之后，可以根据上报类型与标志位之间的对应关系，确定该上报类型为独立类型。
应理解，上述采用2比特来表示标志位仅仅是为了进行举例说明，本申请实施例中的标志位还可以采用其他比特或其他字符表示，本申请实施例对此不作限定。
作为一个可选的实施例，在所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，所述方法还包括：
所述网络设备确定所述码本参数；
在所述上报类型为所述第一类型或所述第二类型的情况下，所述网络设备向所述终端设备发送所述码本参数。
则对应地，在所述终端设备根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI之前，包括：
在所述上报类型为所述第一类型或所述第二类型的情况下，所述终端设备接收所述网络设备发送的所述码本参数。
作为一个可选的实施例，在所述终端设备确定码本参数之后，所述方法还包括：
所述终端设备向所述网络设备发送所述码本参数。
则对应地，在所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，所述方法还包括：
所述网络设备接收所述终端设备发送的所述码本参数。
具体地，在采用码本方式上报CSI的情况下，终端设备和网络设备不仅需要确定当前CSI的上报类型，还需要确定当前上报CSI所采用的码本参数。码本参数可以由网络设备确定，并通知终端设备，也可以由终端设备确定，并通知网络设备，本申请实施例对此不作限定。
应理解，只有在上述上报类型为独立类型(即上述第一类型)或增强类型(即上述第二类型)的情况下，网络设备才可以主动更改CSI的上报内容，即主动确定CSI的上报类型以及码本参数，并将其发送给终端设备。而在上报类型为更新类型(即上述第三类型) 的情况下，由于网络设备无法获知信道状态，只有终端设备可以主动发起对更新类型的CSI的上报，在这种情况下，更新类型对应的码本参数也只能由该终端设备确定，并通知该网络设备。
作为一个可选的实施例，所述CSI包括下列信息中的至少一种：预编码矩阵指示PMI、秩指示RI和信道质量指示CQI。
具体地，终端设备反馈至网络设备的信道状态信息CSI，可以包括秩指示(rank indication，RI)、预编码矩阵指示(pre-coding matrix indicator，PMI)和信道质量指示(channel quality indication，CQI)中的至少一种。其中，RI标识发送端空间传输的可用层数，PMI标识最优预编码矩阵的码本索引，CQI是上报RI/PMI时的信道质量，用于发送端选择传输的调制方式和编码速率。
应理解，上述CSI还可以包括其他信息，例如，在波束叠加的上报技术中，上述CSI还包括系数量化信息，本申请实施例对此不作限定。
为了便于理解，下面结合三种可能的实现方式对本申请实施例的数据传输方法进行详细说明。
方式一
(1)第一时刻
终端设备可以基于波束选择(beam selection)的上报技术，从多个备选波束中选择最优波束b 0，并向网络设备发送波束b 0的CSI，此时，该终端设备上报的用于表示本次测量结果的CSI(下面简称为UE CSI)的总波束的个数为L＝1；
对应地，网络设备接收该终端设备上报的波束b 0的CSI，根据波束b 0的CSI，确定当前下行信道的信道状态，并根据该信道状态进行数据传输。
(2)第二时刻
终端设备确定当前上报CSI的标志位，该标志位用于指示当前的CSI的上报类型，该终端设备将该标志位发送给网络设备。该终端设备根据该标志位确定该第二时刻的CSI的上报类型为增强类型，该终端设备从除b 0外剩余的备选波束中选择一个波束b 1，向网络设备发送波束b 1的CSI，此时，该终端设备上报的用于表示UE CSI的总波束的个数为L＝2；
对应地，网络设备接收该终端设备上报的波束b 1的CSI，并接收该终端设备发送的用于指示当前的CSI的上报类型的标志位，该网络设备通过接收到的标志位确定该终端设备在第二时刻上报的CSI的上报类型为增强类型，该网络设备将波束b 1的CSI与波束b 0的CSI进行聚合，获得当前下行信道的信道状态，并根据该信道状态进行数据传输。
方式二
(1)第一时刻
终端设备可以基于波束叠加(beam combination)的上报技术，从多个备选波束中选择信息量最大的CSI对应的两个波束b 0和b 1，并向网络设备发送波束b 0和b 1的CSI，此时该终端设备上报的用于表示UE CSI的总波束的个数为L＝2；
对应地，网络设备接收该终端设备上报的波束b 0和b 1的CSI，根据波束b 0和b 1的CSI，确定当前下行信道的信道状态，并根据该信道状态进行数据传输；
(2)第二时刻
终端设备确定当前上报CSI的标志位，该标志位用于指示当前的CSI的上报类型，该终端设备将该标志位发送给网络设备。该终端设备根据该标志位确定该第二时刻的CSI的上报类型为增强类型，该终端设备从除b 0和b 1外剩余的备选波束中选择两个波束b 2和b 3，向网络设备发送波束b 2和b 3的CSI，此时，该终端设备上报的用于表示UE CSI的总波束的个数为L＝4；
对应地，网络设备接收该终端设备上报的波束b 2和b 3的CSI，并接收该终端设备发送的用于指示当前的CSI的上报类型的标志位，该网络设备通过接收到的标志位确定该终端设备在第二时刻上报的CSI的上报类型为增强类型，该网络设备将波束b 2和b 3的CSI与波束b 0和b 1的CSI进行聚合，获得当前下行信道的信道状态，并根据该信道状态进行数据传输。
(3)第三时刻
终端设备确定当前上报CSI的标志位，该标志位用于指示当前的CSI的上报类型，该终端设备将该标志位发送给网络设备。该终端设备根据该标志位确定该第三时刻的CSI的上报类型为增强类型，该终端设备从除b 0、b 1、b 2和b 3外剩余的备选波束中选择两个波束b 4和b 5，向网络设备发送波束b 4和b 5的CSI，此时，该终端设备上报的用于表示UE CSI的总波束的个数为L＝6；
对应地，网络设备接收该终端设备上报的波束b 4和b 5的CSI，并接收该终端设备发送的用于指示当前的CSI的上报类型的标志位，该网络设备通过接收到的标志位确定该终端设备在第三时刻上报的CSI的上报类型为增强类型，该网络设备将波束b 4和b 5的CSI与波束b 0、b 1、b 2和b 3的CSI进行聚合，获得当前下行信道的信道状态，并根据该信道状态进行数据传输。
这样，随着终端设备上报的CSI越来越多，网络设备可以获得更高精度的CSI，CSI反馈质量可以得到显著提升。
方式三
(1)第一时刻
终端设备可以基于波束叠加(beam combination)的上报技术，从多个备选波束中选择信息量最大的CSI对应的两个波束b 0和b 1，并向网络设备发送波束b 0和b 1的CSI，此时，该终端设备上报的用于表示UE CSI的总波束的个数为L＝2；
对应地，网络设备接收该终端设备上报的波束b 0和b 1的CSI，根据波束b 0和b 1的CSI，确定当前下行信道的信道状态，并根据该信道状态进行数据传输；
(2)第二时刻
终端设备确定当前上报CSI的标志位，该标志位用于指示当前的CSI的上报类型，该终端设备将该标志位发送给网络设备。该终端设备根据该标志位确定该第二时刻的CSI的上报类型为增强类型，该终端设备从除b 0和b 1外剩余的备选波束中选择两个波束b 2和b 3，向网络设备发送波束b 2和b 3的CSI，此时，该终端设备上报的用于表示UE CSI的总波束的个数为L＝4；
对应地，网络设备接收该终端设备上报的波束b 2和b 3的CSI，并接收该终端设备发送的用于指示当前的CSI的上报类型的标志位，该网络设备通过接收到的标志位确定该终端设备在第二时刻上报的CSI的上报类型为增强类型，该网络设备将波束b 2和b 3的CSI 与波束b 0和b 1的CSI进行聚合，获得当前下行信道的信道状态，并根据该信道状态进行数据传输。
(3)第三时刻
终端设备确定当前上报CSI的标志位，该标志位用于指示当前的CSI的上报类型，该终端设备将该标志位发送给网络设备。该终端设备根据该标志位确定该第三时刻的CSI的上报类型为独立类型，该终端设备确定触发新的CSI上报，重新对信道状态进行测量，从多个备选波束中选择信息量最大的CSI对应的6个波束b 0-b 5，并向网络设备发送当前时刻波束b 0-b 5的CSI，此时，该终端设备上报的用于表示UE CSI的总波束的个数为L＝6；
对应地，网络设备接收该终端设备上报的波束b 0-b 5的CSI，并接收该终端设备发送的用于指示当前的CSI的上报类型的标志位，该网络设备通过接收到的标志位确定该终端设备在第三时刻上报的CSI的上报类型为独立类型，该网络设备确定终端设备开始新的上报周期，根据波束b 0-b 5的CSI，确定当前下行信道的信道状态，并根据该信道状态进行数据传输；
(3)第四时刻
终端设备确定当前上报CSI的标志位，该标志位用于指示当前的CSI的上报类型，该终端设备将该标志位发送给网络设备。该终端设备根据该标志位确定该第四时刻的CSI的上报类型为更新类型，该终端设备从该上报周期中已经上报但CSI发生改变的波束b 0-b 5中选择波束b 4和b 5，向网络设备发送波束b 4和b 5的CSI，此时UE上报的用于表示UE CSI的总波束的个数为L＝6；
对应地，网络设备接收该终端设备上报的波束b 4和b 5的CSI，并接收该终端设备发送的用于指示当前的CSI的上报类型的标志位，该网络设备通过接收到的标志位确定该终端设备在第四时刻上报的CSI的上报类型为更新类型，该网络设备对终端设备在第三时刻上报的波束b 4和b 5的CSI进行更新，根据更新后的波束b 0-b 5的CSI，确定当前下行信道的信道状态，并根据该信道状态进行数据传输。
这本申请实施例中，终端设备上报的CSI可以实时改变，一旦信道发生改变，终端设备可以触发新的CSI上报，或者对当前已经上报的波束的CSI进行更新，从而提高CSI上报的准确性。
应理解，上述时刻均为预配置的CSI上报时刻，且第二时刻在第一时刻之后，第三时刻在第二时刻之后，第四时刻在第三时刻之后。
本申请实施例的数据传输方法，通过设置标志位来指示当前时刻的CSI的上报类型，能够使网络设备或终端设备根据实际情况对当前时刻上报的CSI进行调整，以满足信道不断变化的需求，从而提高CSI上报的灵活性。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上文中结合图1至图2，详细描述了根据本申请实施例的数据传输方法，下面将结合图3至图6，详细描述根据本申请实施例的终端设备和网络设备。
图3示出了本申请实施例提供的终端设备300，该终端设备300包括：确定单元310和收发单元320，
其中，所述确定单元310用于确定信道状态信息CSI的上报类型，所述上报类型用于 表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
所述收发单元320，用于根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数。
本申请实施例的终端设备，通过终端设备与网络设备协商CSI的上报类型，该终端设备可以向该网络设备发送与协商的上报类型对应的CSI，能够使网络设备或终端设备根据实际情况对当前时刻上报的CSI进行调整，以满足信道不断变化的需求，从而提高CSI上报的灵活性，提高系统性能。
可选地，所述上报类型为下列类型中的任意一种：第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
可选地，所述确定单元310还用于：在所述根据所述上报类型以及所述码本参数，向网络设备发送N个波束的CSI之前，确定所述码本参数；根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束。
可选地，所述确定单元310具体用于：若所述上报类型为第一类型，确定开始新的上报周期的CSI上报，并将N个CSI对应的波束确定为所述N个波束；若所述上报类型为第二类型，将所述当前上报周期中未上报过的CSI中的N个CSI对应的波束确定为所述N个波束；若所述上报类型为第三类型，将所述当前上报周期中已上报过的CSI中需要更新的N个CSI对应的波束确定为所述N个波束。
可选地，所述确定单元310具体用于：根据下行信道状态，确定所述上报类型；所述收发单元320还用于：根据所述上报类型，向所述网络设备发送用于指示所述上报类型标志位。
可选地，所述收发单元320还用于：在所述上报类型为所述第一类型或所述第二类型的情况下，接收所述网络设备发送的标志位，所述标志位用于指示所述上报类型；所述确定单元310具体用于：根据所述标志位，确定所述上报类型。
可选地，所述收发单元320还用于：在所述根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI之前，在所述上报类型为所述第一类型或所述第二类型的情况下，接收所述网络设备发送的所述码本参数。
可选地，所述收发单元320还用于：在所述确定码本参数之后，向所述网络设备发送所述码本参数。
应理解，这里的终端设备300以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，终端设备300可以具体为上述实施例中的终端设备，终端设备300可以用于执行上述方法实施例中与终端设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图4示出了本申请实施例提供的网络设备400，该网络设备400包括：确定单元410和收发单元420，
其中，所述确定单元410用于确定终端设备的信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
所述收发单元420用于接收所述终端设备发送的N个波束的CSI，N为大于或等于1的整数；
所述确定单元410还用于：
根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态，所述码本参数用于指示所述终端设备当前上报的波束的个数N。
本申请实施例的网络设备，通过终端设备与网络设备协商CSI的上报类型，该终端设备可以向该网络设备发送与协商的上报类型对应的CSI，能够使网络设备或终端设备根据实际情况对当前时刻上报的CSI进行调整，以满足信道不断变化的需求，从而提高CSI上报的灵活性，提高系统性能。
可选地，所述上报类型为下列类型中的任意一种：第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
可选地，所述确定单元410具体用于：若所述上报类型为第一类型，确定所述终端设备开始新的上报周期，并根据所述N个波束的CSI确定所述当前信道状态；若所述上报类型为第二类型，将所述N个波束的CSI与所述当前上报周期内已上报过的波束的CSI进行聚合处理，获得所述当前信道状态；若所述上报类型为第三类型，将所述当前上报周期内已上报过的N个波束的CSI更新为所述终端设备当前上报的所述N个波束的CSI，并根据更新后的波束的CSI确定所述当前信道状态。
可选地，所述确定单元410具体用于：在所述上报类型为所述第一类型或所述第二类型的情况下，根据所述历史上报的波束的CSI，确定所述上报类型；所述收发单元420还用于：根据所述上报类型，向所述终端设备发送用于指示所述上报类型的标志位。
可选地，所述收发单元420还用于：接收所述终端设备发送的标志位，所述标志位用于指示所述上报类型；
所述确定单元410具体用于：根据所述标志位，确定所述上报类型。
可选地，所述确定单元410还用于：在所述根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，确定所述码本参数；所述收发单元420还用于：在所述上报类型为所述第一类型或所述第二类型的情况下，向所述终端设备发送所述码本参数。
可选地，所述收发单元420还用于：在所述根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，接收所述终端设备发送的所述码本参数。
应理解，这里的网络设备400以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个 或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，网络设备400可以具体为上述实施例中的网络设备，网络设备400可以用于执行上述方法实施例中与网络设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图5示出了本申请实施例提供的另一网络设备500。该网络设备500包括处理器510、收发器520和存储器530。其中，处理器510、收发器520和存储器530通过内部连接通路互相通信，该存储器530用于存储指令，该处理器510用于执行该存储器530存储的指令，以控制该收发器520发送信号和/或接收信号。
当存储器530中存储的程序指令被处理器510执行时，该处理器510用于确定终端设备的信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；通过该收发器520接收所述终端设备发送的N个波束的CSI，N为大于或等于1的整数；该处理器510还用于根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态，所述码本参数用于指示所述终端设备当前上报的波束的个数N。
上述处理器510和存储器530可以合成一个处理装置，处理器510用于执行存储器530中存储的程序代码来实现上述功能。具体实现时，该存储器530也可以集成在处理器510中，或者独立于处理器510。
上述网络设备500还可以包括天线540，用于将收发器520输出的下行数据或下行控制信令通过无线信号发送出去。应理解，网络设备500可以具体为上述实施例200中的网络设备，并且可以用于执行上述方法实施例200中与网络设备对应的各个步骤和/或流程。可选地，该存储器530可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器510可以用于执行存储器中存储的指令，并且当该处理器510执行存储器中存储的指令时，该处理器510用于执行上述与该网络设备对应的方法实施例的各个步骤和/或流程。
图6示出了本申请实施例提供的另一终端设备600。如图6所示，该终端设备600包括处理器601和收发器602，可选地，该终端设备600还包括存储器603。其中，其中，处理器602、收发器602和存储器603之间通过内部连接通路互相通信，传递控制和/或数据信号，该存储器603用于存储计算机程序，该处理器601用于从该存储器603中调用并运行该计算机程序，以控制该收发器602收发信号。
当存储器603中存储的程序指令被处理器601执行时，该处理器601用于确定信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，当前上报的波束的CSI与历史上报的波束的CSI之间的关系；根据所述上报类型以及码本参数，通过该收发器602向网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数。
上述处理器601和存储器603可以合成一个处理装置，处理器601用于执行存储器603中存储的程序代码来实现上述功能。具体实现时，该存储器603也可以集成在处理器601中，或者独立于处理器601。上述终端设备600还可以包括天线604，用于将收发器 602输出的上行数据或上行控制信令通过无线信号发送出去。
应理解，终端设备600可以具体为上述实施例200中的终端设备，并且可以用于执行上述方法实施例200中终端设备对应的各个步骤和/或流程。可选地，该存储器630可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器610可以用于执行存储器中存储的指令，并且当该处理器610执行存储器中存储的指令时，该处理器610用于执行上述与该终端设备对应的方法实施例的各个步骤和/或流程。
上述处理器601可以用于执行前面方法实施例中描述的由终端内部实现的动作，而收发器602可以用于执行前面方法实施例中描述的终端向终端设备传输或者发送的动作。具体请见前面方法实施例中的描述，此处不再赘述。
上述终端设备600还可以包括电源606，用于给终端设备600中的各种器件或电路提供电源。
除此之外，为了使得终端设备的功能更加完善，该终端设备600还可以包括输入单元606，显示单元607，音频电路608，摄像头609和传感器610等中的一个或多个，所述音频电路还可以包括扬声器6082，麦克风6084等。
应理解，在本申请实施例中，上述网络设备500以及终端设备600的处理器可以是中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件单元组合执行完成。软件单元可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器执行存储器中的指令，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例中描述的各方法步骤和单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各实施例的步骤及组成。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域普通技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的 划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (33)

  1. 一种数据传输方法，其特征在于，包括：
    终端设备确定信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
    所述终端设备根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数。
  2. 根据权利要求1所述的方法，其特征在于，所述上报类型为下列类型中的任意一种：
    第一类型、第二类型以及第三类型；其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
  3. 根据权利要求1或2所述的方法，其特征在于，在所述终端设备根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI之前，所述方法还包括：
    所述终端设备确定所述码本参数；
    所述终端设备根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束。
  4. 根据权利要求3所述的方法，其特征在于，所述终端设备根据所述上报类型以及码本参数，确定所述当前上报的所述N个波束，包括：
    若所述上报类型为第一类型，所述终端设备确定开始新的上报周期的CSI上报，并将N个CSI对应的波束确定为所述N个波束；
    若所述上报类型为第二类型，所述终端设备将所述当前上报周期中未上报过的CSI中的N个CSI对应的波束确定为所述N个波束；
    若所述上报类型为第三类型，所述终端设备将所述当前上报周期中已上报过的CSI中需要更新的N个CSI对应的波束确定为所述N个波束。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述终端设备确定信道状态信息CSI的上报类型，包括：
    所述终端设备根据下行信道状态，确定所述上报类型；
    所述方法还包括：
    所述终端设备根据所述上报类型，向所述网络设备发送用于指示所述上报类型的标志位。
  6. 根据权利要求2至4中任一项所述的方法，其特征在于，所述终端设备确定信道状态信息CSI的上报类型，包括：
    在所述上报类型为所述第一类型或所述第二类型的情况下，所述终端设备接收所述网络设备发送的标志位，所述标志位用于指示所述上报类型；
    所述终端设备根据所述标志位，确定所述上报类型。
  7. 根据权利要求2至6中任一项所述的方法，其特征在于，在所述终端设备根据所 述上报类型以及码本参数，向网络设备发送N个波束的CSI之前，所述方法还包括：
    在所述上报类型为所述第一类型或所述第二类型的情况下，所述终端设备接收所述网络设备发送的所述码本参数。
  8. 根据权利要求3至6中任一项所述的方法，其特征在于，在所述终端设备确定码本参数之后，所述方法还包括：
    所述终端设备向所述网络设备发送所述码本参数。
  9. 一种数据传输方法，其特征在于，包括：
    网络设备确定终端设备的信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
    所述网络设备接收所述终端设备发送的N个波束的CSI，N为大于或等于1的整数；
    所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态，所述码本参数用于指示所述终端设备当前上报的波束的个数N。
  10. 根据权利要求9所述的方法，其特征在于，所述上报类型为下列类型中的任意一种：
    第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
  11. 根据权利要求10所述的方法，其特征在于，所述网络设备根据所述上报类型、所述码本参数以及所述N个波束的CSI，确定下行信道的当前信道状态，包括：
    若所述上报类型为第一类型，所述网络设备确定所述终端设备开始新的上报周期，并根据所述N个波束的CSI确定所述当前信道状态；
    若所述上报类型为第二类型，所述网络设备将所述N个波束的CSI与所述当前上报周期内已上报过的波束的CSI进行聚合处理，获得所述当前信道状态；
    若所述上报类型为第三类型，所述网络设备将所述当前上报周期内已上报过的N个波束的CSI更新为所述终端设备当前上报的所述N个波束的CSI，并根据更新后的波束的CSI确定所述当前信道状态。
  12. 根据权利要求10或11所述的方法，其特征在于，所述网络设备确定终端设备的信道状态信息CSI的上报类型，包括：
    在所述上报类型为所述第一类型或所述第二类型的情况下，所述网络设备根据所述历史上报的波束的CSI，确定所述上报类型；
    所述方法还包括：
    所述网络设备根据所述上报类型，向所述终端设备发送用于指示所述上报类型的标志位。
  13. 根据权利要求9至11中任一项所述的方法，其特征在于，所述网络设备确定终端设备的信道状态信息CSI的上报类型，包括：
    所述网络设备接收所述终端设备发送的标志位，所述标志位用于指示所述上报类型；
    所述网络设备根据所述标志位，确定所述上报类型。
  14. 根据权利要求10至13中任一项所述的方法，其特征在于，在所述网络设备根据 码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，所述方法还包括：
    所述网络设备确定所述码本参数；
    在所述上报类型为所述第一类型或所述第二类型的情况下，所述网络设备向所述终端设备发送所述码本参数。
  15. 根据权利要求9至13中任一项所述的方法，其特征在于，在所述网络设备根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，所述方法还包括：
    所述网络设备接收所述终端设备发送的所述码本参数。
  16. 一种终端设备，其特征在于，包括：
    处理器，用于确定信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
    收发器，用于根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI，所述码本参数用于指示所述当前上报的波束的个数N，N为大于或等于1的整数。
  17. 根据权利要求16所述的终端设备，其特征在于，所述上报类型为下列类型中的任意一种：
    第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
  18. 根据权利要求16或17所述的终端设备，其特征在于，所述处理器还用于：
    在所述根据所述上报类型以及所述码本参数，向网络设备发送N个波束的CSI之前，确定所述码本参数；
    根据所述上报类型以及所述码本参数，确定所述当前上报的所述N个波束。
  19. 根据权利要求18所述的终端设备，其特征在于，所述处理器具体用于：
    若所述上报类型为第一类型，确定开始新的上报周期的CSI上报，并将N个CSI对应的波束确定为所述N个波束；
    若所述上报类型为第二类型，将所述当前上报周期中未上报过的CSI中的N个CSI对应的波束确定为所述N个波束；
    若所述上报类型为第三类型，将所述当前上报周期中已上报过的CSI中需要更新的N个CSI对应的波束确定为所述N个波束。
  20. 根据权利要求16至19中任一项所述的终端设备，其特征在于，所述处理器具体用于：
    根据下行信道状态，确定所述上报类型；
    所述收发器还用于：
    根据所述上报类型，向所述网络设备发送用于指示所述上报类型标志位。
  21. 根据权利要求17至19中任一项所述的终端设备，其特征在于，所述收发器还用于：
    在所述上报类型为所述第一类型或所述第二类型的情况下，接收所述网络设备发送的 标志位，所述标志位用于指示所述上报类型；
    所述处理器具体用于：
    根据所述标志位，确定所述上报类型。
  22. 根据权利要求17至21中任一项所述的终端设备，其特征在于，所述收发器还用于：
    在所述根据所述上报类型以及码本参数，向网络设备发送N个波束的CSI之前，在所述上报类型为所述第一类型或所述第二类型的情况下，接收所述网络设备发送的所述码本参数。
  23. 根据权利要求18至21中任一项所述的终端设备，其特征在于，所述收发器还用于：
    在所述确定码本参数之后，向所述网络设备发送所述码本参数。
  24. 一种网络设备，其特征在于，包括：
    处理器，用于确定终端设备的信道状态信息CSI的上报类型，所述上报类型用于表示在当前上报周期内，所述终端设备当前上报的波束的CSI与历史上报的波束的CSI之间的关系；
    收发器，用于接收所述终端设备发送的N个波束的CSI，N为大于或等于1的整数；
    所述处理器还用于：
    根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态，所述码本参数用于指示所述终端设备当前上报的波束的个数N。
  25. 根据权利要求24所述的网络设备，其特征在于，所述上报类型为下列类型中的任意一种：
    第一类型、第二类型以及第三类型，其中，所述第一类型用于表示所述当前上报的CSI为新的上报周期的CSI，所述第二类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的增量信息，所述第三类型用于表示所述当前上报的CSI为所述历史上报的波束的CSI的更新信息。
  26. 根据权利要求25所述的网络设备，其特征在于，所述处理器具体用于：
    若所述上报类型为第一类型，确定所述终端设备开始新的上报周期，并根据所述N个波束的CSI确定所述当前信道状态；
    若所述上报类型为第二类型，将所述N个波束的CSI与所述当前上报周期内已上报过的波束的CSI进行聚合处理，获得所述当前信道状态；
    若所述上报类型为第三类型，将所述当前上报周期内已上报过的N个波束的CSI更新为所述终端设备当前上报的所述N个波束的CSI，并根据更新后的波束的CSI确定所述当前信道状态。
  27. 根据权利要求25或26所述的网络设备，其特征在于，所述处理器具体用于：
    在所述上报类型为所述第一类型或所述第二类型的情况下，根据所述历史上报的波束的CSI，确定所述上报类型；
    所述收发器还用于：
    根据所述上报类型，向所述终端设备发送用于指示所述上报类型的标志位。
  28. 根据权利要求24至26中任一项所述的网络设备，其特征在于，所述收发器还用 于：
    接收所述终端设备发送的标志位，所述标志位用于指示所述上报类型；
    所述处理器具体用于：
    根据所述标志位，确定所述上报类型。
  29. 根据权利要求25至28中任一项所述的网络设备，其特征在于，所述处理器还用于：
    在所述根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，确定所述码本参数；
    所述收发器还用于：
    在所述上报类型为所述第一类型或所述第二类型的情况下，向所述终端设备发送所述码本参数。
  30. 根据权利要求24至28中任一项所述的网络设备，其特征在于，所述收发器还用于：
    在所述根据码本参数、所述上报类型以及所述N个波束的CSI，确定下行信道的当前信道状态之前，接收所述终端设备发送的所述码本参数。
  31. 一种计算机可读介质，用于存储计算机程序，其特征在于，所述计算机程序包括用于实现上述权利要求1至15中任一项所述的方法的指令。
  32. 一种计算机程序产品，所述计算机程序产品中包括计算机程序代码，其特征在于，当所述计算机程序代码在计算机上运行时，使得计算机实现上述权利要求1至15中任一项所述的方法。
  33. 一种芯片，其特征在于，包括：处理器，用于读取存储器中存储的指令，当所述处理器执行所述指令时，使得所述芯片实现上述权利要求1至15中任一项所述的方法的指令。
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