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WO2020155119A1 - Procédé et appareil pour rapporter des informations d'état de canal - Google Patents

Procédé et appareil pour rapporter des informations d'état de canal Download PDF

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Publication number
WO2020155119A1
WO2020155119A1 PCT/CN2019/074490 CN2019074490W WO2020155119A1 WO 2020155119 A1 WO2020155119 A1 WO 2020155119A1 CN 2019074490 W CN2019074490 W CN 2019074490W WO 2020155119 A1 WO2020155119 A1 WO 2020155119A1
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WO
WIPO (PCT)
Prior art keywords
time unit
reporting
indication information
offset
csi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/074490
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English (en)
Chinese (zh)
Inventor
李雪茹
张瑞齐
周永行
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201980089297.4A priority Critical patent/CN113302870B/zh
Priority to CN202211182123.2A priority patent/CN115834017B/zh
Priority to PCT/CN2019/074490 priority patent/WO2020155119A1/fr
Publication of WO2020155119A1 publication Critical patent/WO2020155119A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • 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

  • This application relates to the communication field, in particular, to a method and device for reporting channel state information in the communication field.
  • Channel state information (channel state information, CSI) is used to indicate the channel attributes of a communication link, and the accuracy of the CSI obtained by a network device largely determines the performance of the communication system.
  • CSI channel state information
  • FDD frequency division duplexing
  • TDD time division duplexing
  • the CSI fed back by the terminal equipment is more sensitive to time delay, especially for the terminal equipment with high moving speed. Because CSI reflects the channel state at a fixed time, if the movement of the terminal equipment causes a channel change, the CSI received by the network equipment It cannot fully reflect the current channel state. In this case, if the network device directly applies the CSI fed back by the terminal device, the matching degree between the CSI and the channel at the current moment will decrease, which will affect the data transmission performance.
  • the present application provides a method and device for reporting channel state information, which is beneficial to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • the first indication information indicates at least two reporting time unit offsets
  • the second indication information is used to select the reporting time unit offset corresponding to the CSI reported by the terminal device, so that the network device can flexibly select the reference time according to needs.
  • the unit is beneficial to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • the CSI of the above K 1 reference time units includes the CSI of each reference time unit of the K 1 reference time units, which is collectively referred to as the first CSI in this application.
  • the above-mentioned first CSI includes the CSI of each of the K 1 reference time units, and may be the first CSI formed by compressing the CSI of each reference time unit, or may not be the first CSI formed by compressing the CSI of each reference time unit.
  • the first CSI formed by CSI compression is not limited in the embodiment of the present application.
  • the above-mentioned first indication information may be radio resource control (radio resource control, RRC) signaling
  • the second indication information may be media access control element (MAC CE) or downlink control information (downlink). control information, DCI).
  • RRC radio resource control
  • MAC CE media access control element
  • DCI downlink control information
  • the foregoing first indication information may be MAC CE, and the second indication information may be DCI.
  • the first CSI reported by the terminal device includes at least one predicted value of the CSI at a future moment (also referred to as predicted CSI in this document), and the network device can use the predicted value of the CSI according to the predicted value of the CSI.
  • the terminal device is scheduled to perform data transmission at the corresponding time (or a time near the scheduled time). Since the terminal device has unquantized CSI, the terminal device performs CSI prediction based on the unquantized CSI, which can obtain better prediction performance and improve the accuracy of CSI.
  • the above Both are less than zero, and K 1 is greater than or equal to 2, that is, the first CSI reported by the terminal device includes the measured values of the CSI at at least two historical moments, and the network device can perform future moments based on the measured values of the CSI at the at least two historical moments CSI prediction of other times, so as to obtain the predicted value of CSI at other times, and schedule the terminal device to perform data transmission at the corresponding time.
  • CSI prediction by network equipment can reduce the computational complexity of the terminal equipment, thereby reducing the power consumption of the terminal equipment.
  • the above Both are greater than zero, and K 1 is greater than or equal to 2, that is, the first CSI reported by the terminal device includes at least two predicted values of CSI at future moments.
  • the terminal device predicts the CSI, and reports the predicted result to the network device.
  • the aforementioned at least two future moments may be moments when the network device thinks that data scheduling will be performed, and the network device may directly perform downlink data precoding according to the report of the terminal device without further prediction. Since the terminal device has unquantized CSI, CSI prediction based on the unquantized CSI can obtain better prediction performance.
  • the network device may further predict CSI at other moments according to the predicted values of at least two future moments included in the first CSI. For example, the network device may obtain CSI at other moments between the foregoing two future moments or at other moments after the foregoing two future moments through interpolation. In this way, it is possible to reduce the time constraint on the data scheduling of the network device, thereby matching a more flexible scheduling strategy.
  • the second indication information is used to indicate the K 1 reporting time unit offsets among the K 2 reporting time unit offsets, and the K 2
  • the number of reporting time unit offsets belongs to the K reporting time unit offsets, K 2 is a positive integer less than K, and K 1 is less than K 2 ;
  • the method further includes: the terminal device receives third indication information, so said third indication information is used to report the number K K time units offset in two time units offset reporting.
  • the network device may transmit a first indication information to the K report time offset means, the third indication information indicating the retransmission of the K report in time units offset K 2 two units reporting time offset, then send the second
  • the indication information indicates K 1 reporting time unit offsets among K 2 reporting time unit offsets. That is, the K 1 reporting time unit offset corresponding to the CSI that the terminal device ultimately needs to report is selected through a three-level indication. Therefore, K 1 ⁇ K 2 ⁇ K.
  • the foregoing first indication information is RRC signaling
  • the third indication information is MAC CE or DCI
  • the second indication information is MAC CE or DCI.
  • the second indication information is further used to instruct the terminal device to send the first CSI.
  • the network device may first select K 2 reporting time unit offsets through the third indication information, and the terminal device may start the first CSI parameter training or the first CSI parameter calculation according to the third indication information.
  • the terminal device receives the second indication information sent by the network device for triggering the CSI report, the relevant parameters of the first CSI have been calculated, and the first CSI can be calculated faster, which helps reduce the CSI report time Delay to improve the timeliness of CSI reporting.
  • the method further includes: the terminal device receives fourth indication information, where the fourth indication information is used to instruct the terminal device to send the first CSI.
  • the foregoing first indication information is RRC signaling
  • the second indication information is MAC CE or DCI
  • the fourth indication information is DCI.
  • the network device needs to send a signaling to the terminal device to trigger the above-mentioned reporting of the first CSI.
  • the signaling used to trigger the CSI report may be the foregoing second indication information, or may also be other information different from the foregoing second indication information, such as the foregoing fourth indication information, which is not limited in the embodiment of the present application.
  • the first indication information is used to indicate M reported time unit offset sets, and the reported time units included in the M reported time unit offset sets
  • the K reporting time unit offsets indicated by the first indication information are the reporting time unit offsets in the M reporting time unit offset set, that is, the K reporting time unit offsets and the M reporting time unit offsets.
  • the shift set is equivalent.
  • the network device can indicate the M reporting time unit offset sets through the foregoing first indication information, and the terminal device can determine K reporting time unit offsets according to the M reporting time unit offset sets.
  • the m-th reported time unit offset set in the M reported time unit offset sets includes x m reported time unit offsets, and at least one of x m is greater than or equal to 2, which can be obtained M is less than K. Therefore, by indicating in a collective manner, the signaling overhead of indicating K 1 reference time units in the subsequent second indication information can be reduced.
  • the second indication information is used to report the M time units offset in the set of M 1 th cell offset set reporting time, the M The reporting time unit offsets included in one reporting time unit offset set are the K 1 reporting time unit offsets, and M 1 is a positive integer less than M.
  • the network device may report the information indicative of the M time indicated by the second offset unit M 1 one set of cell offset set reporting time. At this time, the network device only needs to indicate M 1 reported time unit offset sets through the identifier of the reported time unit offset set, thereby saving signaling overhead.
  • the third indication information indicates reporting the M time units offset in the set of M 2 th cell offset set reporting time
  • the second the two M cell offset set two time reporting indication information is used in the M 1 th cell offset set reporting time
  • the time of reporting two M cell offset set reporting time unit included in the offset The K 2 reporting time unit offsets, M 2 is a positive integer smaller than M, and M 1 is smaller than M 2 .
  • the above K reporting time unit offsets are equally spaced, and the interval is P.
  • the network device can only configure the terminal device with the smallest reporting time unit offset n 1 and interval P.
  • the terminal device uses the above formula That is, the other reporting time unit offsets among the K reporting time unit offsets can be calculated. Therefore, in the embodiment of the present application, the K reporting time unit offsets are configured to be equally spaced, which is beneficial to save the signaling overhead of configuring the K reporting time unit offsets by the network device. Measuring the CSI of the reference time unit at equal intervals is beneficial for terminal equipment and/or network equipment to predict CSI and improve the prediction accuracy.
  • the method further includes: the terminal device reporting capability information, the capability information being used to indicate the maximum value of K supported by the terminal device and/or The maximum value of K 1 .
  • the number of reported time unit offsets configured by the network device for the terminal device can better match the actual situation of the terminal device, avoiding the large number of reported time unit offsets configured by the network device, but the terminal device cannot report more CSI situation.
  • the first indication information indicates at least two reporting time unit offsets
  • the second indication information is used to select the reporting time unit offset corresponding to the CSI reported by the terminal device, so that the network device can flexibly select the reference time according to needs.
  • the unit is beneficial to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • the second indication information is used to indicate the K 1 reporting time unit offsets among the K 2 reporting time unit offsets, and the K 2
  • the number of reporting time unit offsets belongs to the K reporting time unit offsets, K 2 is a positive integer less than K, and K 1 is less than K 2
  • the method further includes: the network device sends third indication information, so said third indication information is used to report the number K K time units offset in two time units offset reporting.
  • the second indication information is further used to instruct the terminal device to send the first CSI.
  • the method further includes: the network device sending fourth indication information, where the fourth indication information is used to instruct the terminal device to send the first CSI.
  • the first indication information is used to indicate M reported time unit offset sets, and the reported time units included in the M reported time unit offset sets
  • the second indication information is used to report the M time units offset in the set of M 1 th cell offset set reporting time, the M The reporting time unit offsets included in one reporting time unit offset set are the K 1 reporting time unit offsets, and M 1 is a positive integer less than M.
  • the j-th reporting time unit offset among the K reporting time unit offsets n j n 1 +(j-1)*P, P Is a positive integer, j ⁇ 1,2,...,K ⁇ .
  • the method further includes: the network device receives capability information, where the capability information is used to indicate the maximum value of K supported by the terminal device and/or K 1 The maximum value.
  • a device for reporting channel state information is provided, which is used to implement the method in any possible implementation manner of the foregoing aspects.
  • the device includes a unit for executing the method in any possible implementation manner of the foregoing aspects.
  • the device includes a transceiver, a memory, and a processor.
  • the transceiver, the memory, and the processor communicate with each other through an internal connection path
  • the memory is used to store instructions
  • the processor is used to execute the instructions stored in the memory to control the receiver to receive signals and control the transmitter to send signals
  • the processor executes the instructions stored in the memory, the processor is caused to execute the method in any one of the possible implementation manners of the foregoing aspects.
  • a computer program product includes: computer program code, which when the computer program code is run by a computer, causes the computer to execute any one of the possible implementations of the above aspects In the method.
  • a computer-readable medium for storing a computer program, and the computer program includes instructions for executing a method in any one of the possible implementation manners of the foregoing aspects.
  • a chip including: an input interface, an output interface, at least one processor, and a memory.
  • the input interface, the output interface, the processor, and the memory are connected by an internal connection path.
  • the processor is configured to execute the code in the memory, and when the code is executed, the processor is configured to execute the method in any possible implementation manner of the foregoing aspects.
  • Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present application.
  • Figure 2 shows a schematic diagram of a time unit in an embodiment of the present application.
  • Fig. 3 shows a schematic diagram of a reference time unit according to an embodiment of the present application.
  • FIG. 4 shows a schematic diagram of another reference time unit according to an embodiment of the present application.
  • FIG. 5 shows a schematic flowchart of a method for reporting channel state information according to an embodiment of the present application.
  • FIG. 6 shows a schematic diagram of the relationship between the reported time unit offsets in an embodiment of the present application.
  • FIG. 7 shows a schematic diagram of multiple reference time units in an embodiment of the present application.
  • FIG. 8 shows a schematic flowchart of another method for reporting channel state information according to an embodiment of the present application.
  • FIG. 9 shows a schematic block diagram of an apparatus for reporting channel state information according to an embodiment of the present application.
  • FIG. 10 shows a schematic block diagram of another apparatus for reporting channel state information according to an embodiment of the present application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the technical solutions of the embodiments of the present application can also be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems.
  • SCMA is The field of communication can also be called other names;
  • the technical solutions in the embodiments of the present application can be applied to a multi-carrier transmission system using non-orthogonal multiple access technology, for example, using non-orthogonal multiple access technology orthogonal Frequency division multiplexing (orthogonal frequency division multiplexing, OFDM), filter bank multi-carrier (FBMC), general frequency division multiplexing (generalized frequency division multiplexing, GFDM), filtered orthogonal frequency division multiplexing ( filtered-OFDM, F-OFDM) system, etc.
  • OFDM orthogonal Frequency division multiplexing
  • FBMC filter bank multi-carrier
  • GFDM general frequency division multiplexing
  • filtered orthogonal frequency division multiplexing filtered-OFDM, F-OFDM
  • the terminal equipment in the embodiments of the present application may communicate with one or more core networks via a radio access network (RAN).
  • RAN radio access network
  • the terminal equipment may be called an access terminal, 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 device.
  • the access terminal can 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 Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or terminals in the future evolution of the public land mobile network (PLMN) Equipment etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device in the embodiment of the application may be a device used to communicate with a terminal device.
  • the network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA)
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • the base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system.
  • NodeB, NB base station
  • WCDMA wideband code division multiple access
  • evolved evolved base station
  • NodeB eNB or eNodeB
  • it can also be a wireless controller in a cloud radio access network (CRAN) scenario
  • the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future
  • the network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application.
  • the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.
  • various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques.
  • article of manufacture used in this application encompasses a computer program that can be accessed from any computer-readable device, carrier, or medium.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • the embodiments of this application can be applied to LTE systems and subsequent evolutionary systems such as 5G, etc., or other wireless communication systems using various wireless access technologies, such as code division multiple access, frequency division multiple access, time division multiple access, orthogonality Frequency division multiple access, single carrier frequency division multiple access and other access technology systems are especially suitable for scenarios that require channel information feedback and/or apply secondary precoding technology, such as wireless networks using Massive MIMO technology and distributed antennas Technology of wireless networks, etc.
  • various wireless access technologies such as code division multiple access, frequency division multiple access, time division multiple access, orthogonality
  • Frequency division multiple access, single carrier frequency division multiple access and other access technology systems are especially suitable for scenarios that require channel information feedback and/or apply secondary precoding technology, such as wireless networks using Massive MIMO technology and distributed antennas Technology of wireless networks, etc.
  • MIMO multiple-input multiple-output
  • the antenna transmits and receives, thereby improving communication quality. It can make full use of space resources and achieve multiple transmissions and multiple receptions through multiple antennas. Without increasing spectrum resources and antenna transmission power, the system channel capacity can be doubled.
  • MIMO can be divided into single-user multiple input multiple output (single-user MIMO, SU-MIMO) and multi-user multiple input multiple output (multi-user MIMO, MU-MIMO).
  • Massive MIMO is based on the principle of multi-user beamforming. Hundreds of antennas are arranged on the transmitting device, and dozens of target receivers are modulated with their respective beams. Through spatial signal isolation, dozens of signals are simultaneously transmitted on the same frequency resource. Therefore, Massive MIMO technology can make full use of the spatial freedom brought by large-scale antenna configuration and improve spectrum efficiency.
  • Fig. 1 is a schematic diagram of a communication system used in an embodiment of the present application.
  • the communication system 100 includes a network device 102, and the network device 102 may include multiple antenna groups.
  • Each antenna group may include one or more antennas.
  • 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.
  • Figure 1 shows 2 antennas for each antenna group, but more or fewer antennas can be used for each group.
  • the network device 102 may additionally include a transmitter chain and a receiver chain. Those of ordinary skill in the art can understand that they can each include multiple components related to signal transmission and reception, such as processors, modulators, multiplexers, and decoders. Tuner, demultiplexer or antenna, etc.
  • the network device 102 can communicate with multiple terminal devices.
  • the network device 102 can communicate with the terminal device 116 and the terminal device 122.
  • the network device 102 can communicate with any number of terminal devices similar to the terminal device 116 or 122.
  • the terminal devices 116 and 122 may be, for example, cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communication on the wireless communication system 100 equipment.
  • the terminal device 116 communicates with antennas 112 and 114, where the antennas 112 and 114 send information to the terminal device 116 through the forward link 118 and receive information from the terminal device 116 through the reverse link 120.
  • the terminal device 122 communicates with antennas 104 and 106, wherein the antennas 104 and 106 transmit information to the terminal device 122 through the forward link 124, and receive information from the terminal device 122 through the reverse link 126.
  • the forward link 118 may use a different frequency band than the reverse link 120, and the forward link 124 may use a different frequency band than the reverse link 126. .
  • forward link 118 and reverse link 120 can use a common frequency band
  • forward link 124 and reverse link 126 can use a common frequency band. frequency band.
  • Each set of antennas and/or areas designed for communication is referred to as a sector of the network device 102.
  • the antenna group may be designed to communicate with terminal devices in a sector of the area covered by the network device 102.
  • the transmitting antenna of the network device 102 can use beamforming to improve the signal-to-noise ratio of the forward links 118 and 124.
  • the network device 102 uses beamforming to send signals to terminal devices 116 and 122 that are randomly dispersed in the relevant coverage area, Mobile devices will experience less interference.
  • the network device 102, the terminal device 116, or the terminal device 122 may be a wireless communication sending device and/or a wireless communication receiving device.
  • the wireless communication sending device can encode the data for transmission.
  • the wireless communication sending device may acquire a certain number of data bits to be sent to the wireless communication receiving device through a channel.
  • the wireless communication sending device may generate, receive from other communication devices, or store in a memory, etc. to be sent through the channel.
  • a certain number of data bits to the wireless communication receiving device can be included in a transmission block or multiple transmission blocks of data, and the transmission block can be segmented to generate multiple 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 networks.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • Figure 1 is only an example for ease of understanding
  • the simplified schematic diagram of the network can also include other network equipment, which is not shown in Figure 1.
  • the time unit may be a subframe (frame), a time slot (slot), or a symbol (symbol).
  • the identifier of the time unit may specifically be an identifier of a subframe, a time slot, or a symbol. Taking the identifier of a symbol as an example, in a resource unit (including one or more resource blocks (RB)), the identifier of the symbol may be 0 to 6 (or 1 to 7), or 0 to 13 (or 1 to 14).
  • the time unit identifiers are cyclical. For example, in each resource unit, the symbol identifiers are 0-13. For multiple resource units, the symbol identifiers are 0-13, 0-13 in sequence. ,..., 0-13 and so on. If the identifier of a certain time unit is a negative value, then the time unit is the time unit corresponding to the corresponding value from the resource unit corresponding to the current moment. For example, according to the above definition, there may be a certain time unit with an identifier of -2. If the resource unit corresponding to the current moment is the second resource unit among 0-13, 0-13, ..., 0-13, then In the previous recursion, the time unit identified as -2 represents the time unit identified as 12 in the first resource unit.
  • the first resource unit and the second resource unit each include 13 time units, and the identifiers of the 13 time units are 0, 1, 2, ..., 13, respectively.
  • n 13, if the time unit identified as n is the time unit identified as 13 in the first resource unit, then the time unit identified as n+2 is the time unit identified as 1 in the second resource unit.
  • the reference time unit is also called a channel quality indication (channel quality indication, CQI) reference resource (reference resource), which is used to indicate that the CQI (or CSI) is calculated based on the channel state information on the time-frequency resource occupied by the reference resource.
  • the CSI may include at least one of rank indication (rank indication, RI), pre-coding matrix indicator (pre-coding matrix indicator, PMI), channel matrix indication, and CQI, which may be configured by a network device.
  • the precoding matrix recommended by the terminal device for the network device indicates the relevant information of the channel matrix from the network device to the terminal device (for example, the channel matrix itself, the correlation matrix of the channel matrix, or the correlation of the channel matrix The eigenvectors of the matrix, etc.).
  • a reference time unit (or CQI reference resource) can occupy one or more OFDM symbols of a certain time unit (such as a time slot) in the time domain, and can occupy one or more OFDM symbols corresponding to the one or more OFDM symbols in the frequency domain.
  • the frequency domain unit may be a subcarrier (subcarrier), a resource block (resource block, RB), or a subband (subband), etc. Therefore, the identifier of the reference time unit is the identifier of the time unit where the OFDM symbol occupied by the reference time unit is located.
  • FIGS 3 and 4 show schematic diagrams of two reference time units.
  • the network device may send a reference signal (such as channel state indication-reference signal (CSI-RS)) to the terminal device on the time unit identified as ny for the terminal device Perform channel measurement.
  • the network device can configure the terminal device to send CSI on the time unit identified as n, and the CSI is calculated based on the channel state information of the time-frequency resources occupied by the reference time unit identified as nx, where n is greater than or equal to 0 Integer, x and y are positive integers. Then the CSI represents the channel state information at a certain time before the reporting time.
  • the network device may send a reference signal (such as a CSI-RS) to the terminal device on a time unit identified as n-y for the terminal device to perform channel measurement.
  • the network device can configure the terminal device to report the CSI on the time unit with the identifier n, and the identifier of the reference time unit on which the CSI is configured is n+m, where n is an integer greater than or equal to 0, and m and y are positive integers . That is, the type of CSI reporting is the prediction type, because the CSI reflects the channel state information at a future time.
  • the terminal device can send the CSI of the reference time unit with the identifier n+m on the time unit with the identifier n, which is also referred to herein as reporting the channel state information at the time n+m at the time n.
  • the CSI represents the channel state information at a certain time in the future after the reporting time.
  • the foregoing n and m may be predefined, or the network device may configure the terminal device through signaling.
  • the time unit identified as n+m is m time units later than the time unit identified as n. Therefore, m can be referred to as a reference time unit offset or a reported time unit offset. Shift (report time unit offset).
  • the time unit identified as n-x is x time units earlier than the time unit identified as n, and x may also be referred to as the reported time unit offset or the reference time unit offset.
  • the reporting time unit offset may also be referred to as a report slot offset (report slot offset).
  • the network device In frequency division duplexing (FDD) systems or other systems with poor channel reciprocity, terminal equipment needs to measure CSI and report it to network equipment. If the CSI reported by the terminal device is the CSI of the reference time unit identified as nx before the reporting time n, and the time when the network device reports the scheduled downlink data to the terminal device is a certain identification after the reporting time n is n+m For a terminal device with a higher moving speed, the CSI at time n+m will not match the CSI at time nx, which seriously affects the transmission efficiency of downlink data. Therefore, the network device can configure the terminal device to report the prediction type CSI. That is, the CSI at time n+m is reported at time n. However, because the data scheduling is dynamic, it is not necessarily located at time n+m. When the scheduling time does not match the predicted time, the predicted CSI may still not match the real CSI, which affects data transmission performance.
  • FDD frequency division duplexing
  • the embodiment of the present application proposes a new method for reporting CSI, which is beneficial to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • FIG. 5 shows a schematic flowchart of a method 500 for reporting CSI according to an embodiment of the present application.
  • the method 500 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 sends the first channel state information CSI on the time unit identified by n, and correspondingly, the network device receives the first CSI on the time unit identified by n, and the first CSI K 1 denotes a CSI reference time unit, K 1 identifies the reference time unit of the reference time units q is n is an integer greater than or equal to zero.
  • the network device may indicate that the reporting time of the K cell offset by the first indication information n 1, n 2, ..., n k , then the second indication information indicates that the reporting time of the K units offsets reported by a K 1 Time unit offset As shown in Figure 6, K 1 reporting time unit offset It is included in K reporting time unit offsets n 1 , n 2 ,..., n k .
  • the terminal device may send the CSI of K 1 reference time units indicated by the second indication information on the time unit identified as n.
  • the CSI of the above K 1 reference time units includes the CSI of each reference time unit of the K 1 reference time units, which is collectively referred to as the first CSI in this application.
  • the above-mentioned first CSI includes the CSI of each of the K 1 reference time units, and may be the first CSI formed by compressing the CSI of each reference time unit, or may not be the first CSI formed by compressing the CSI of each reference time unit.
  • the first CSI formed by CSI compression is not limited in the embodiment of the present application. Since K 1 reference time units are selected from K reference time units, K is an integer greater than or equal to 2, and K 1 is less than K.
  • the above-mentioned first indication information may be radio resource control (radio resource control, RRC) signaling
  • the second indication information may be media access control element (MAC CE) or downlink control information (downlink). control information, DCI).
  • RRC radio resource control
  • MAC CE media access control element
  • DCI downlink control information
  • the foregoing first indication information may be MAC CE, and the second indication information may be DCI.
  • the second indication information when the second indication information is DCI, the second indication information may be carried in an uplink format DCI.
  • the DCI in the uplink format is used to trigger CSI reporting and/or physical uplink shared channel (physical uplink shared channel, PUSCH) transmission.
  • the DCI in this format may include a CSI request (request) field, which is used to trigger the reporting of one CSI or multiple CSIs.
  • the DCI in this format may also include indication information used to indicate uplink resource allocation, that is, the indication information may be used to allocate PUSCH resources carrying CSI.
  • the aforementioned CSI request may also indicate K 1 reference time units corresponding to the CSI.
  • the DCI of the uplink format is not used to trigger the reporting of CSI, but the DCI of the uplink format includes a field for indicating the start of measurement of one CSI or multiple CSIs, and includes K 1 corresponding to the CSI. Reference time unit field. In this case, the DCI does not include indication information for indicating PUSCH resource allocation.
  • the network device may adopt a bit sequence to indicate K 1 reporting time unit offset from the above K reporting time unit offsets, then the bit sequence length corresponding to the second indication information is K .
  • Second instruction K 1 reporting time unit offset 000 n 1 ,n 2 100 n 1 ,n 3 110 n 1 ,n 4 101 n 2 ,n 3 110 n 2 ,n 4 010 n 3 ,n 4 011 ⁇ 001 ⁇ 111 ⁇
  • 000 is used to indicate that the selected reporting time unit offset is identified as n 1 , n 2
  • 100 is used to indicate that the selected reporting time unit offset is identified as n 1 , n 3
  • 110 is used to indicate that the selected reporting time unit offset is identified as n 1 , n 4
  • 101 is used to indicate the selected reporting time unit offset is n 2
  • n 3 110 is used to indicate the selected reporting time unit offset is n 2 , n 4
  • 010 is used to indicate the selected reporting time unit offset
  • the shift identifiers are n 3 , n 4 , and the remaining 011, 001, and 111 can be reserved temporarily, without any physical meaning.
  • the foregoing Table 1 may be agreed upon by the protocol, or configured by the network device for the terminal device through signaling, which is not limited in the embodiment of the present application.
  • the first CSI reported by the terminal device includes at least one predicted value of the CSI at a future moment (also referred to as predicted CSI in this document), and the network device can use the predicted value of the CSI according to the predicted value of the CSI.
  • the terminal device is scheduled to perform data transmission at the corresponding time (or a time near the scheduled time). Since the terminal device has unquantized CSI, the terminal device performs CSI prediction based on the unquantized CSI, which can obtain better prediction performance and improve the accuracy of CSI.
  • the above Both are less than zero, and K 1 is greater than or equal to 2, that is, the first CSI reported by the terminal device includes the measured values of the CSI at at least two historical moments, and the network device can perform future moments based on the measured values of the CSI at the at least two historical moments CSI prediction of other times, so as to obtain the predicted value of CSI at other times, and schedule the terminal device to perform data transmission at the corresponding time.
  • CSI prediction by network equipment can reduce the computational complexity of the terminal equipment, thereby reducing the power consumption of the terminal equipment.
  • the above Both are greater than zero, and K 1 is greater than or equal to 2, that is, the first CSI reported by the terminal device includes at least two predicted values of CSI at future moments.
  • the terminal device predicts the CSI, and reports the predicted result to the network device.
  • the aforementioned at least two future moments may be moments when the network device thinks that data scheduling will be performed, and the network device may directly perform downlink data precoding according to the report of the terminal device without further prediction. Since the terminal device has unquantized CSI, CSI prediction based on the unquantized CSI can obtain better prediction performance.
  • the network device may further predict CSI at other moments according to the predicted values of at least two future moments included in the first CSI. For example, the network device may obtain CSI at other moments between the foregoing two future moments or at other moments after the foregoing two future moments through interpolation. In this way, it is possible to reduce the time constraint on the data scheduling of the network device, thereby matching a more flexible scheduling strategy.
  • the first indication information indicates at least two reporting time unit offsets
  • the second indication information is used to select the reporting time unit offset corresponding to the CSI reported by the terminal device, so that the network device can flexibly select the reference time according to needs.
  • the unit is beneficial to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • the network device when the time when the network device schedules data is not n+n 1 , the first CSI reported by the terminal device is time n+n 1 CSI, this may lead to a mismatch between the CSI reported by the terminal device and the CSI at the scheduled time, which may result in impaired data transmission performance.
  • the network device configures at least two reporting time unit offsets for the terminal device. It is assumed that the terminal device reports the CSI at two moments n+n 1 and n+n 2 at time n.
  • the network device can flexibly determine whether the time for scheduling data is n+n 1 and/or n+n 2 , or even other times n+n 3 according to needs .
  • the CSI at time n+n 3 can be calculated by the network device according to the CSI at time n+n 1 and n+n 2 . Therefore, the method of configuring at least two reporting time unit offsets in the embodiment of the present application can provide a network device with greater flexibility in scheduling data, and at the same time make the CSI reported by the terminal device more suitable for the real channel state during downlink data scheduling.
  • the number of reported time unit offsets configured by the network device for the terminal device is 2, which are n 1 and n 2 respectively .
  • the network device may send a reference signal (such as a CSI-RS) to the terminal device at at least two moments, for example, the network device sends a reference signal to the terminal device at time ny and time nz. Further, the network device triggers reported by the terminal device and the time n + n 1 CSI n + n 2 n at time time, i.e. the reference time unit is located at time n + n 1 and n + n 2 times.
  • a reference signal such as a CSI-RS
  • the terminal device performs channel measurement according to the received reference signal, obtains the CSI at time n+n 1 and the CSI at time n+n 2 , and reports the first CSI at time n.
  • the first CSI includes the CSI at time n+n 1 CSI and CSI at time n+n 2 .
  • time n+n 1 and time n+n 2 are earlier than time n as examples for exemplification, that is, in the embodiment corresponding to FIG. 7, n 1 and n 2 are both negative integers.
  • the network device can obtain the CSI at the future time based on the CSI at time n+n 1 and the CSI at time n+n 2 , for example, taking the CSI at time n+n2 as the CSI at the future time. Or predict the CSI based on the CSI at these two moments to obtain the CSI at the future moment.
  • the terminal device can predict the CSI according to the channel results measured at time ny and time nz to obtain the CSI at time n+n 1 and n+n 2 , and the network equipment The CSI at the data scheduling time is obtained according to the CSI at these two moments, which will not be repeated here.
  • the second indication information is further selected from K 1 K of a reporting time reporting unit time units offset by an offset, then relatively A large value of K means that the terminal device needs to calculate and report the CSI at a greater number of moments, which requires higher computing capabilities of the terminal device, and easily introduces a larger CSI calculation delay, which aggravates the problem of CSI mismatch.
  • the network device may use the second indication information to select a part of the K reporting time unit offsets to report the time unit offset, and the terminal device only needs to calculate the reporting time unit offset indicated by the second indication information
  • the corresponding CSI of the reference time unit can reduce the complexity and calculation delay of the terminal device in calculating the CSI.
  • the foregoing first indication information may be carried in the CSI configuration information.
  • the CSI configuration information may also include: CSI reported content (for example, rank indication (rank indication, RI), pre-coding matrix indicator (pre-coding matrix indicator, PMI), channel quality indication (channel quality indication, CQI), etc.) , The frequency domain granularity of PMI and CQI reporting, the codebook used for CSI calculation, and the channel state indication-reference signal (CSI-RS) resource configuration information used for calculating the CSI.
  • rank indication rank indication
  • pre-coding matrix indicator pre-coding matrix indicator
  • CQI channel quality indication
  • CSI-RS channel state indication-reference signal
  • the aforementioned CSI-RS resources may be periodic CSI-RS resources, semi-persistent CSI-RS resources, or CSI-RS resources sent multiple times triggered by one DCI signaling.
  • the application embodiment does not limit this.
  • the terminal device may perform multiple measurements on the aforementioned CSI-RS resource to obtain each of the K 1 reference time units (identified as ), and report the CSI of the K 1 reference time unit to the network device.
  • the K 1 reference time units include at least one reference time unit at a future time
  • the terminal device may obtain the CSI on the reference time unit at the at least one future time through some algorithm (such as a prediction algorithm).
  • the second indication information is used to indicate the K 1 reporting time unit offsets among the K 2 reporting time unit offsets, and the K 2 reporting time unit offsets belong to all
  • the K reporting time unit offsets, K 2 is a positive integer less than K, and K 1 is less than K 2 ;
  • the method also includes:
  • the network device transmitting the third indication information, correspondingly, the terminal device receives the third indication information, the third indication information indicates the reporting period of the K cell offset in two reports K 2 Time unit offset.
  • the network device may transmit a first indication information to the K report time offset means, the third indication information indicating the retransmission of the K report in time units offset K 2 two units reporting time offset, then send the second
  • the indication information indicates K 1 reporting time unit offsets among K 2 reporting time unit offsets. That is, the K 1 reporting time unit offset corresponding to the CSI that the terminal device ultimately needs to report is selected through a three-level indication. Therefore, K 1 ⁇ K 2 ⁇ K.
  • the foregoing first indication information is RRC signaling
  • the third indication information is MAC CE or DCI
  • the second indication information is MAC CE or DCI.
  • the network device needs to send a signaling to the terminal device to trigger the above-mentioned reporting of the first CSI.
  • the signaling used to trigger the CSI report may be the foregoing second indication information, or may be other information different from the foregoing second indication information, which is not limited in the embodiment of the present application.
  • the second indication information is further used to instruct the terminal device to send the first CSI.
  • the foregoing second indication information may trigger the reporting of CSI. That is, in this embodiment, the second indication information is used to trigger the terminal device to report CSI, and select K 1 reporting time unit offsets corresponding to the reported CSI. Since the second indication information is used to trigger the reporting of CSI, the second indication information may also include indication information of the time-frequency resource carrying the first CSI. In this case, the third indication information does not include the indication information of the time-frequency resource carrying the first CSI.
  • the combination of the second indication information and the third indication information can assist the terminal device to start the parameter calculation of the first CSI in advance.
  • CSI reporting is divided into three reporting modes: periodic (periodic) CSI reporting, semi-persistent (semi-persistent) CSI reporting, and aperiodic (aperiodic) CSI reporting.
  • periodic (periodic) CSI reporting For semi-persistent CSI reporting and aperiodic CSI reporting, if the trigger mechanism is adopted, the terminal device needs to wait for the second indication information for triggering CSI reporting, and then start the first CSI parameter according to the measurement results at multiple historical moments Calculate to determine the first CSI currently reported.
  • the network device may first select K 2 reporting time unit offsets through the third indication information, and the terminal device may start the first CSI parameter training or the first CSI parameter calculation according to the third indication information .
  • the terminal device When the terminal device receives the second indication information sent by the network device for triggering the CSI report, the relevant parameters of the first CSI have been calculated, and the first CSI can be calculated faster, which helps reduce the CSI report time Delay to improve the timeliness of CSI reporting.
  • the method further includes: the network device sends fourth instruction information, and correspondingly, the terminal device receives fourth instruction information, and the fourth instruction information is used to instruct the terminal The device sends the first CSI.
  • the network device may instruct the terminal device to report the CSI through the fourth indication information.
  • the first network device may transmit a first indication information indicates that the reporting time of the K cell offset, then send the second indication information indicating the K report time offset in units K 1 a reporting unit offset time, and then sends the first Fourth, the indication information triggers the terminal device to report CSI.
  • the terminal device can start the calculation or training of the first CSI related parameters according to the measurement results at multiple historical moments, and determine the currently reported first CSI.
  • the terminal device When the terminal device receives the fourth indication information sent by the network device for triggering CSI reporting, the parameters of the first CSI have been trained, and the first CSI can be calculated quickly, which is beneficial to reduce the CSI reporting delay , Improve the timeliness of CSI reporting.
  • the foregoing first indication information is RRC signaling
  • the second indication information is MAC CE or DCI
  • the fourth indication information is DCI.
  • the first indication information is used to indicate M reporting time unit offset sets, and the reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets.
  • the K reporting time unit offsets indicated by the first indication information are the reporting time unit offsets in the M reporting time unit offset set, that is, the K reporting time unit offsets and the M reporting time unit offsets.
  • the shift set is equivalent.
  • the network device can indicate the M reporting time unit offset sets through the foregoing first indication information, and the terminal device can determine K reporting time unit offsets according to the M reporting time unit offset sets.
  • the m-th reported time unit offset set in the M reported time unit offset sets includes x m reported time unit offsets, and at least one of x m is greater than or equal to 2, which can be obtained M is less than K. Therefore, by indicating in a collective manner, the signaling overhead of indicating K 1 reference time units in the subsequent second indication information can be reduced.
  • reporting time unit offsets Set 1 ⁇ n 1 ,n 3 ⁇
  • report time unit offset set 2 ⁇ n 2 ⁇
  • report time unit offset set 3 ⁇ n 4 ,n 5 ⁇ .
  • the second indication information is used to report the M time units offset in the set of M 1 th cell offset set reporting time, the time reporting unit M 1 a set of offset
  • the included reporting time unit offsets are the K 1 reporting time unit offsets, and M 1 is a positive integer less than M.
  • the network device may report the information indicative of the M time indicated by the second offset unit M 1 one set of cell offset set reporting time. At this time, the network device only needs to indicate M 1 reported time unit offset sets through the identifier of the reported time unit offset set, thereby saving signaling overhead.
  • the reported time unit offset set 3 ⁇ n 4 ,n 5 ⁇
  • the network device only needs to report the identifier of the time unit offset set, that is, indicate the report time unit offset set 1 through the above second indication information, and the terminal device can determine the 1 reported time unit offset set according to the second indication information
  • the network device may use the bit sequence to indicate the K 1 reported time unit offsets.
  • the second indication information is DCI
  • the reduction of bit overhead for example, from 5 bits to 3 bits
  • the third indication information indicates reporting the M time units offset in the set of M 2 th cell offset set reporting time, the second indication information indicating M 2
  • the M 1 reporting time unit offset sets in the M 2 reporting time unit offset sets, the reporting time unit offsets included in the M 2 reporting time unit offset sets are the K 2 reporting time unit offsets Shift, M 2 is a positive integer smaller than M, and M 1 is smaller than M 2 .
  • the network device may also only indicate to report the time unit offset set.
  • the specific situation is similar to the above, and will not be repeated here.
  • the above K reporting time unit offsets are equally spaced, and the interval is P.
  • the network device can only configure the terminal device with the smallest reporting time unit offset n 1 and interval P.
  • the K reporting time unit offsets are configured to be equally spaced, which is beneficial to save the signaling overhead of configuring the K reporting time unit offsets by the network device. Measuring the CSI of the reference time unit at equal intervals is beneficial for terminal equipment and/or network equipment to predict CSI and improve the prediction accuracy.
  • the method further includes: the terminal device reports capability information, and correspondingly, the network device receives capability information, and the capability information is used to indicate the maximum K supported by the terminal device. maximum value and / or to K 1.
  • the terminal device may report to the network device, indicating that the terminal device can support a maximum value of K and / or to K 1.
  • the network device can determine the values of K and K 1 according to the capability information reported by the terminal device. In this way, the number of reported time unit offsets configured by the network device for the terminal device can better match the actual situation of the terminal device, avoiding the large number of reported time unit offsets configured by the network device, but the terminal device cannot report more CSI situation.
  • FIG. 8 shows a schematic flowchart of a method 800 for reporting CSI according to an embodiment of the present application.
  • the method 800 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 transmits the capability information of the network device, correspondingly, a network device receives the capability information, the terminal capability information indicating the maximum value of K supported by the device and / or to K 1.
  • the network device determines K and/or K 1 according to the foregoing capability information.
  • each terminal device may report the capability information to the first network device and a second capability information, the capability information for a first indication of a maximum value of K, the second capability information indicating the maximum value K 1.
  • the network device can determine K according to the first capability information, and determine K 1 according to the second capability information. It is understood that the order of application of the first embodiment transmits capability information and capability information of the second embodiment is not limited to, determination of K and K 1 is not limited in the sequence.
  • the network device sends the first indication information, and correspondingly, the terminal device receives the first indication information.
  • the network device sends the CSI-RS to the terminal device, and correspondingly, the terminal device receives the CSI-RS.
  • the network device transmits the CSI-RS in at least K 1 time units.
  • the K 1 time units may be located in K 1 time slots or in K 1 groups of OFDM symbols.
  • the K 1 groups of OFDM symbols may be located in K 1 /X time slots, and X is an integer greater than 1.
  • the terminal device performs channel measurement according to the received CSI-RS to determine the first CSI.
  • the first CSI may include the CSI at a historical moment actually measured by the terminal device, or may include the CSI at a future moment obtained by the terminal device based on the CSI at the historical moment, which is not limited in this embodiment of the application.
  • the terminal device sends the first CSI to the network device, and correspondingly, the network device receives the first CSI.
  • the network device determines the time unit that needs to schedule data transmission according to the first CSI, and then schedules the data transmission.
  • the method for reporting channel state information according to an embodiment of the present application is described in detail above with reference to FIGS. 1 to 8.
  • the device for reporting channel state information according to an embodiment of the present application will be described in detail below with reference to FIGS. 9 to 10.
  • FIG. 9 shows an apparatus 900 for reporting channel state information provided by an embodiment of the present application.
  • the apparatus 900 may be a terminal device or a chip in the terminal device.
  • the device 900 may be a network device or a chip in the network device.
  • the device 900 includes: a receiving unit 910 and a sending unit 920.
  • the apparatus 900 is configured to execute various processes and steps corresponding to the terminal device in the above method 200.
  • the transmitting unit 920 configured to: transmit a first identified as a CSI channel state information on a time unit n, K 1 represents the first CSI values of CSI reference time unit, the q-K 1 reference time unit The reference time unit is identified as n is an integer greater than or equal to zero.
  • the first indication information indicates at least two reporting time unit offsets
  • the second indication information is used to select the reporting time unit offset corresponding to the CSI reported by the terminal device, so that the network device can flexibly select the reference time according to needs.
  • Unit and flexibly determine the time unit for scheduling data according to the CSI reported by the terminal device, which helps to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • the second indication information is used to indicate the K 1 reporting time unit offsets among the K 2 reporting time unit offsets, and the K 2 reporting time unit offsets belong to the K reporting time unit offsets.
  • the time unit offset, K 2 is a positive integer less than K, and K 1 is less than K 2 ;
  • the receiving unit 910 is further configured to: receive third indication information, where the third indication information is used to indicate the K reports The K 2 reported time unit offsets in the time unit offset.
  • the second indication information is also used to instruct the apparatus to send the first CSI.
  • the receiving unit 910 is further configured to: receive fourth indication information, where the fourth indication information is used to instruct the apparatus to send the first CSI.
  • the first indication information is used to indicate M reporting time unit offset sets, and the reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets ,
  • the second indication information is used to report the M time units offset in the set of M 1 th cell offset set reporting time, the M 1 th time reporting unit reports the offset included in the set
  • the time unit offset is the K 1 reported time unit offset, and M 1 is a positive integer less than M.
  • the sending unit 920 is further configured to: report the capability information, the capability information indicating the maximum value of K means supported and / or to K 1.
  • the apparatus 900 is configured to execute various processes and steps corresponding to the network device in the above method 200.
  • the receiving unit 910 configured to: receive a first identification channel state information CSI on the n time units, K 1 represents the first CSI values of CSI reference time unit, the q-K 1 reference time unit The reference time unit is identified as n is an integer greater than or equal to zero.
  • the first indication information indicates at least two reporting time unit offsets
  • the second indication information is used to select the reporting time unit offset corresponding to the CSI reported by the terminal device, so that the network device can flexibly select the reference time according to needs.
  • Unit and flexibly determine the time unit for scheduling data according to the CSI reported by the terminal device, which helps to improve the matching degree between the CSI applied by the network device and the channel at the current moment, thereby improving data transmission performance.
  • the second indication information is used to indicate the K 1 reporting time unit offsets among the K 2 reporting time unit offsets, and the K 2 reporting time unit offsets belong to the K reporting time unit offsets.
  • Time unit offset, K 2 is a positive integer smaller than K, and K 1 is smaller than K 2 ;
  • the sending unit 920 is further configured to: send a third indication information, the third indication information indicates the reporting period of the K and K 2 unit in two offset time units offset reporting.
  • the second indication information is also used to instruct the terminal device to send the first CSI.
  • the sending unit 920 is further configured to send fourth indication information, where the fourth indication information is used to instruct the terminal device to send the first CSI.
  • the first indication information is used to indicate M reporting time unit offset sets, and the reporting time unit offsets included in the M reporting time unit offset sets are the K reporting time unit offsets ,
  • the second indication information is used to report the M time units offset in the set of M 1 th cell offset set reporting time, the M 1 th time reporting unit reports the offset included in the set
  • the time unit offset is the K 1 reported time unit offset, and M 1 is a positive integer less than M.
  • the receiving unit 910 is further configured to: receiving capability information, the capability information indicates a maximum value of the terminal devices supported by the K and / or to K 1.
  • the device 900 here is embodied in the form of a functional unit.
  • the term "unit” here can refer to application specific integrated circuits (ASICs), electronic circuits, processors for executing one or more software or firmware programs (such as shared processors, proprietary processors, or group Processor, etc.) and memory, merged logic circuits and/or other suitable components that support the described functions.
  • ASICs application specific integrated circuits
  • the apparatus 900 may be specifically a terminal device or a network device in the foregoing embodiment, and the apparatus 900 may be used to execute each of the terminal devices or network devices in the foregoing method embodiment. In order to avoid repetition, the process and/or steps will not be repeated here.
  • the apparatus 900 of each of the foregoing solutions has the function of implementing the corresponding steps performed by the terminal device or the network device in the foregoing method; the function may be implemented by hardware, or may be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the sending unit can be replaced by a transmitter, the receiving unit can be replaced by a receiver, and other units, such as a determining unit, can be replaced by a processor and executed respectively. Transceiving operations and related processing operations in each method embodiment.
  • the device 900 in FIG. 9 may also be a chip or a chip system, such as a system on chip (system on chip, SoC).
  • the receiving unit and the sending unit may be the transceiver circuit of the chip, which is not limited here.
  • FIG. 10 shows another apparatus 1000 for reporting channel state information provided by an embodiment of the present application.
  • the device 1000 includes a processor 1010, a transceiver 1020, and a memory 1090.
  • the processor 1010, the transceiver 1020, and the memory 1090 communicate with each other through an internal connection path.
  • the memory 1090 is used to store instructions, and the processor 1010 is used to execute instructions stored in the memory 1090 to control the transceiver 1020 to send signals and / Or receive signal.
  • the apparatus 1000 is configured to execute each process and step corresponding to the terminal device in the above method 200.
  • the apparatus 1000 is configured to execute each process and step corresponding to the network device in the above method 200.
  • the apparatus 1000 may be specifically a terminal device or a network device in the foregoing embodiment, and may be used to execute various steps and/or processes corresponding to the terminal device or the network device in the foregoing method embodiment.
  • the memory 1090 may include a read-only memory and a random access memory, and provides instructions and data to the processor. A part of the memory may also include a non-volatile random access memory.
  • the memory can also store device type information.
  • the processor 1010 may be used to execute instructions stored in the memory, and when the processor 1010 executes the instructions stored in the memory, the processor 1010 is configured to execute each of the above method embodiments corresponding to the terminal device or the network device. Steps and/or processes.
  • the processor of the above-mentioned device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), or application specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software units in the processor.
  • the software unit may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor executes the instructions in the memory and completes the steps of the above method in combination with its hardware. In order to avoid repetition, it will not be described in detail here.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are in an “or” relationship.
  • "The following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • At least one item (a) of a, b, or c can represent: a, b, c, a-b, a-c, b-c or a-b-c, where a, b, and c can be single or multiple.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms 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, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium It includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

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

Abstract

La présente invention concerne un procédé et un appareil pour rapporter des informations d'état de canal (CSI), permettant d'améliorer le degré de correspondance de CSI utilisées par un dispositif de réseau avec un canal au moment actuel, ce qui améliore ainsi les performances de transmission de données. Ledit procédé comprend les étapes suivantes : un dispositif de réseau envoie des premières informations d'indication, et un dispositif de terminal reçoit les premières informations d'indication, les premières informations d'indication étant utilisées pour indiquer K décalages d'unités de temps de rapport n i, i＝1,2,…,K ; le dispositif de réseau envoie des secondes informations d'indication, et le dispositif de terminal reçoit les secondes informations d'indication, les secondes informations d'indication étant utilisées pour indiquer K1 décalages d'unité de temps de rapport (I) parmi les K décalages d'unité de temps de rapport, q＝1,2,...,K 1, i q∈{1,2,...,K}, K 1 étant inférieur à K ; et le dispositif de terminal envoie des premières CSI sur une unité de temps désignée par n, et le dispositif de réseau reçoit les premières CSI, les premières CSI représentant des CSI concernant K1 unités de temps de référence, l'identifiant de la qème unité de temps de référence parmi les K1 unités de temps de référence étant (II).
PCT/CN2019/074490 2019-02-01 2019-02-01 Procédé et appareil pour rapporter des informations d'état de canal Ceased WO2020155119A1 (fr)

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EP4542906A4 (fr) * 2022-06-16 2025-09-17 Vivo Mobile Communication Co Ltd Procédé et appareil de détermination d'informations, dispositif de communication et support de stockage lisible
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