WO2019134570A1 - Procédé de mesure d'informations d'état de canal, dispositif terminal, et dispositif de réseau - Google Patents

Procédé de mesure d'informations d'état de canal, dispositif terminal, et dispositif de réseau Download PDF

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Publication number
WO2019134570A1
WO2019134570A1 PCT/CN2018/123960 CN2018123960W WO2019134570A1 WO 2019134570 A1 WO2019134570 A1 WO 2019134570A1 CN 2018123960 W CN2018123960 W CN 2018123960W WO 2019134570 A1 WO2019134570 A1 WO 2019134570A1
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WIPO (PCT)
Prior art keywords
csi
downlink control
measurement
control information
information
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PCT/CN2018/123960
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English (en)
Chinese (zh)
Inventor
韩玮
葛士斌
王潇涵
毕晓艳
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华为技术有限公司
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Publication of WO2019134570A1 publication Critical patent/WO2019134570A1/fr

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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
    • 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
    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [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

Definitions

  • the present application relates to the field of communications and, more particularly, to a method of measuring channel state information, a terminal device, and a network device.
  • Coordination Multiple Point (CoMP) transmission is a method for solving inter-cell interference problems and improving cell edge user throughput.
  • a network device communicates with a terminal device, it may not know whether there are other network devices and several other network devices that communicate with the terminal device. Therefore, the network device may be to the terminal device.
  • the interference measurement assumptions are indicated such that the terminal device performs channel state information (CSI) measurement and feedback separately according to various interference measurement assumptions.
  • the network device in turn, can determine the transmission scheme based on the CSI measured and fed back under various interference measurement assumptions, and adaptively adjust the scheduling strategy.
  • the network device may indicate various interference measurement assumptions to the terminal device by using downlink control information. For example, if S (S ⁇ 1, S is an integer) interference measurement assumptions are to be indicated, the network device needs S indications, and one or more interference measurement resources are indicated in each indication, and there is a large signaling. Overhead. As the number of cooperatively transmitted stations increases, the interference measurement assumptions also increase, and the resulting signaling overhead is also more serious.
  • the present application provides a method for measuring channel state information, a terminal device, and a network device, which can reduce signaling overhead.
  • a method for measuring channel state information including:
  • the terminal device receives downlink control information, where the downlink control information carries measurement information for channel state information CSI measurement, and the measurement information includes at least indication information of a channel state information reference signal CSI-RS resource configuration, the CSI-RS
  • the resource configuration indication information is used to indicate a CSI-RS resource
  • the terminal device receives a downlink control information in the preset time period, the terminal device performs CSI measurement based on the measurement information carried in the one downlink control information, and otherwise, based on at least two received in the preset time period.
  • the measurement information carried in the downlink control information is subjected to each CSI measurement.
  • the plurality of downlink control information is received in the preset time period, and the terminal device performs each CSI measurement based on the measurement information carried in the at least two downlink control information received in the preset time period;
  • a downlink control information is received in the preset time period, and the terminal device performs CSI measurement only based on the measurement information carried in the one downlink control information.
  • the terminal device performs multiple CSI measurement on the measurement information carried by the at least two downlink control information of the multiple downlink control information received in the preset time period, and each CSI in the multiple CSI measurement
  • the measurement may be performed based on the measurement information carried by the at least two downlink control information of the multiple downlink control information, and the at least two downlink control information on which the CSI measurement is based may be different.
  • CSI measurements can be classified into two types of measurement: single site based CSI measurement and multi site based CSI measurement.
  • the CSI measurement may be performed based on the measurement information carried in one downlink control information; in the multi-site based CSI measurement, each CSI measurement may be performed based on the measurement information carried in the multiple downlink control information.
  • the measurement type may include: CSI measurement based on measurement information carried in at least two downlink control information, or CSI measurement based on measurement information carried in one downlink control information.
  • the terminal device may perform CSI measurement based on different measurement types according to the quantity of downlink control information received within a preset time period. Therefore, the network equipment does not need additional signaling overhead to indicate various interference measurement assumptions, but the terminal device autonomously determines the measurement type, which can greatly save signaling overhead. Moreover, the measurement type thus determined can obtain more accurate CSI feedback to the network device, thereby facilitating the network device to determine a reasonable transmission scheme and scheduling strategy, that is, improving the reliability of data transmission and improving system performance.
  • each CSI measurement based on the measurement information carried by the at least two downlink control information received in the preset time period including:
  • the terminal device performs the CSI measurement according to the measurement information carried in the N downlink control information received in the preset time period, where the N pieces of downlink control information are other than the nth downlink control information.
  • the CSI-RS resource indicated by the downlink control information is an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information, and the nth downlink control information is that the terminal device is in the preset time period.
  • One of the plurality of downlink control information received, N ⁇ n ⁇ 1, N ⁇ 2, and n and N are integers.
  • the terminal device receives M downlink control information within the preset time period, M ⁇ N ⁇ 2, and M and N are integers.
  • the N downlink control information is part or all of the M downlink control information.
  • the M downlink control information may be in one-to-one correspondence with the M network devices. If the terminal device receives downlink control information from the M network devices within a preset time period, each of the M network devices may be used.
  • the network device performs multi-site based CSI measurement, and may also perform multi-site based measurement for each of a part of the network devices of the M network devices, that is, the number N of CSI measurement performed by the terminal device may be less than Or a positive integer equal to M.
  • Each CSI measurement may be performed based on measurement information carried in part or all of the downlink control information of the M downlink control information.
  • the N pieces of downlink control information may be excluded from the nth downlink control information.
  • the CSI-RS resource indicated by the downlink control information is used as an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information.
  • the measurement information further includes indication information of a codebook subset restriction CSR, where the indication information of the CSR is used to indicate a limited codebook subset,
  • the codebook subset includes some or all of the codewords in the codebook;
  • the terminal device performs each CSI measurement based on the measurement information carried by the at least two downlink control information received in the preset time period, including:
  • the terminal device performs the CSI measurement according to the codebook subset indicated by the at least two downlink control information received in the preset time period.
  • the terminal device By indicating to the terminal device the codebook subset used by the network device, more information can be provided for the terminal device to perform CSI measurement, for example, the terminal device can precode the received CSI-RS based on the codebook subset, thereby The optimal precoding matrix feedback can be determined for the network device.
  • the measurement information is carried in a CSI request field.
  • the CSI request field may be a field in the DCI defined in the LTE protocol or the NR protocol.
  • the method further comprises:
  • the terminal device receives the first indication information, where the first indication information indicates whether to perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the first indication information indicates whether the CSI measurement is performed based on the measurement information carried in the downlink control information, or the first indication information indicates whether the CSI measurement is performed based on the measurement information carried in the downlink control information.
  • the CSI measurement is performed based on the measurement information carried in the at least two downlink control information.
  • the network device can autonomously determine the measurement type of the CSI measurement and indicate to the terminal device the measurement type of the CSI measurement. Therefore, the network device can instruct the terminal device to perform corresponding CSI measurement according to the current requirement, so that the network device determines a reasonable transmission scheme and a scheduling policy, which is beneficial to improving reliability of data transmission.
  • each downlink control information of the multiple downlink control information carries a channel state information CSI Report configuration instructions
  • Only one of the plurality of downlink control information carries indication information of multiple CSI report configurations;
  • Only one downlink control information of the multiple downlink control information carries indication information of a CSI report configuration.
  • the specific content of the measurement information carried in the downlink control information is not particularly limited, and various possible situations of the specific content of the measurement information carried in the downlink control information are listed above.
  • the method further comprises:
  • the terminal device sends CSI, and the CSI is measured based on measurement information carried in one or at least two downlink control information.
  • the terminal device may send the corresponding CSI to each network device, and may also send the CSI measured for each network device to a certain network device, which is not limited in this application.
  • the CSI sent by the terminal device may be the CSI measured based on the measurement information carried in the downlink control information, or may be the CSI measured based on the measurement information carried in the at least two downlink control information.
  • a method for measuring channel state information including:
  • the terminal device sends the channel state information CSI, and the CSI is measured based on the measurement information carried in the downlink control information, or the CSI is measured based on the measurement information carried in the at least two downlink control information.
  • the terminal device can carry CSI through a field, where the field can be used to carry CSI based on single-site CSI measurement, and can also be used to carry multi-site based CSI measured by CSI.
  • the terminal device sends the CSI, including:
  • the terminal device sends a first CSI report, where the first CSI report includes a first field and a second field, where the first field includes: at least one CSI measured based on measurement information carried by one downlink control information, Or the at least one measured CSI based on the measurement information carried in the at least two downlink control information, where the second field indicates whether the CSI in the first field is measured based on the measurement information carried in the at least two downlink control information. ;or
  • each first CSI report of the plurality of first CSI reports includes a first field and a second field, where the first field includes one based on one or at least two
  • the feedback process of the above CSI explicitly indicates the type of measurement on which the CSI is based through an indication field.
  • the terminal device sends the CSI, including:
  • the terminal device sends a first CSI report, where the first CSI report includes a first field, where the first field includes at least one CSI measured based on measurement information carried in at least two downlink control information, or a pre- Defining a value; the predefined value implicitly indicating that the terminal device does not perform CSI measurement based on measurement information carried in the at least two downlink control information; or
  • the terminal device sends a plurality of first CSI reports, where each first CSI report of the multiple first CSI reports includes a first field, where the first field includes one that is carried based on at least two downlink control information. Measuring the CSI obtained by the information measurement, or a predefined value; the predefined value implicitly indicating that the terminal device does not perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the feedback process of the CSI indicates the type of measurement on which the CSI is based in an implicit manner, and the bit overhead caused by the indication can be saved.
  • the terminal device may carry CSI by using multiple fields, where one field may be used to carry CSI based on single-site CSI measurement, and may also be used for carrying CSI based on multi-site CSI measurement; another field can only be used to carry CSI measured based on one measurement type, such as CSI based on single site CSI measurement.
  • the single-site CSI measurement result and the multi-site based CSI measurement result can be fed back to the network device at the same time, which is beneficial to the network device to determine a more reasonable transmission scheme and scheduling strategy.
  • the terminal device sends the CSI, including:
  • the terminal device sends a second CSI report, where the second CSI report includes a third field and a fourth field, where the third field is used to carry at least one measurement information carried in one or at least two downlink control information. Measuring the obtained CSI, where the fourth field is used to carry at least one CSI measured based on measurement information carried in only one downlink control information; or
  • each second CSI report of the plurality of second CSI reports includes a third field and a fourth field, where the third field is used to carry one based on one or at least The CSI measured by the measurement information carried in the two downlink control information, the fourth field is only used to carry a CSI measured based on the measurement information carried in one downlink control information.
  • the feedback process of the above CSI explicitly indicates the type of measurement on which the CSI is based through an indication field.
  • the second CSI report further includes a fifth field, where the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried in the at least two downlink control information.
  • the feedback process of the CSI indicates the type of measurement on which the CSI is based in an implicit manner, and the bit overhead caused by the indication can be saved.
  • a method for measuring channel state information including:
  • the network device receives channel state information CSI
  • the network device determines whether the received CSI is measured based on measurement information carried in the at least two downlink control information.
  • the network device may determine whether the CSI is measured based on measurement information carried in a downlink control information, or determine that the CSI is measured based on measurement information carried in a downlink control information. The obtaining is also measured based on the measurement information carried in the at least two downlink control information.
  • the terminal device can autonomously determine the type of measurement on which the CSI measurement is based, and can measure the type of measurement on which the network device CSI is based on any of the following implementations while feeding back the CSI to the network device.
  • the terminal device may carry CSI through a field, where the field may be used to carry CSI based on single-site CSI measurement, and may also be used to carry CSI measured based on multi-site CSI.
  • the network device receives the CSI, including:
  • the network device receives a first CSI report, where the first CSI report includes a first field and a second field, where the first field includes at least one measured based on measurement information carried in one or at least two downlink control information.
  • the CSI, the second field indicates whether each CSI in the first field is measured based on measurement information carried by at least two downlink control information.
  • the feedback process of the above CSI explicitly indicates the type of measurement on which the CSI is based through an indication field.
  • the network device receives the CSI, including:
  • the network device Receiving, by the network device, a first CSI report, where the first CSI report includes a first field, where the first field includes at least one CSI measured based on measurement information carried in at least two downlink control information, or a predefined
  • the value of the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the feedback process of the CSI indicates the type of measurement on which the CSI is based in an implicit manner, and the bit overhead caused by the indication can be saved.
  • the network device receives the CSI, including:
  • the network device receives a second CSI report, where the second CSI report includes a third field and a fourth field, where the third field is used to carry at least one measurement information carried based on one or at least two downlink control information.
  • the fourth field is used to carry at least one CSI measured based on only one CSI-RS resource.
  • the feedback process of the above CSI explicitly indicates the type of measurement on which the CSI is based through an indication field.
  • the second CSI report further includes a fifth field, where the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried by the at least two downlink control information.
  • the feedback process of the CSI indicates the type of measurement on which the CSI is based in an implicit manner, and the bit overhead caused by the indication can be saved.
  • a terminal device for performing the method of any of the first to second aspects or any of the first to second aspects.
  • the terminal device includes a module for performing the method in any one of the first to second aspects or the first to second aspects of the foregoing possible implementation manner.
  • a network device for performing the method of any of the third or third aspect of the possible implementation.
  • the network device comprises means for performing the method of any of the possible implementations of the third or third aspect above.
  • a terminal device including a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal
  • the memory is configured to store a computer program
  • the processor is configured to call and run the computer program from the memory, so that the terminal device performs the first to second aspects and the first to the second A method in any of the possible implementations of the aspects.
  • a network device including a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program, the processor for calling and running the computer program from the memory, such that the network device performs any of the third aspect and the third aspect described above The method in the implementation.
  • the eighth aspect provides a communication system, including the terminal device provided by the fourth aspect and the network device provided by the fifth aspect, or the terminal device provided by the sixth aspect and the network device provided by the seventh aspect.
  • a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the method of the above aspects.
  • a computer readable storage medium for storing a computer program, the computer program comprising instructions for performing the method of the above aspects.
  • a chip system comprising a processor for calling and running the computer program from a memory, the computer program for implementing the method of the above aspects.
  • FIG. 1 is a schematic diagram of a wireless communication system suitable for use in an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a method for measuring channel state information provided by an embodiment of the present application
  • FIG. 3 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a network device according to an embodiment of the present application.
  • FIG. 5 is another schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 6 is another schematic block diagram of a network 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 Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system applicable to the embodiment of the present application is first described in detail by taking the communication system shown in FIG. 1 as an example.
  • FIG. 1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application.
  • the wireless communication system 100 can include at least one network device, such as the network device #1 111, the network device #2 112, and the network device #3 113 shown in FIG. 1, and the wireless communication system 100 can also At least one terminal device is included, for example, the terminal device 121 shown in FIG.
  • one or more of the network device #1 111, the network device #2 112, and the network device #3 113 can simultaneously communicate with the terminal device 121.
  • network device #1 111 and network device #2 112 simultaneously communicate with terminal device 121.
  • the network device in the wireless communication system may be any device having a wireless transceiver function or a chip that can be disposed on the device, including but not limited to: an evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), and home base station (for example, Home evolved) NodeB, or Home Node B, HNB), BaseBand Unit (BBU), Access Point (AP), Wireless Relay Node, Wireless Backhaul Node in Wireless Fidelity (WIFI) System , transmission point (TP) or transmission and reception point (TRP), etc., can also be 5G, such as NR, gNB in the system, or transmission point (TRP or TP), 5G system
  • One or a group of antennas including multiple antenna panels
  • a network node that constitutes a gNB or transmission point such as a baseband unit (BBU), or a distributed unit (distr) Imped unit, DU) and
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (RU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU implements radio resource control (RRC), the function of the packet data convergence protocol (PDCP) layer, and the DU implements the wireless chain.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU implements the wireless chain.
  • the functions of the radio link control (RLC), the media access control (MAC), and the physical (PHY) layer Since the information of the RRC layer eventually becomes information of the PHY layer or is transformed by the information of the PHY layer, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be used in this architecture.
  • the network device can be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU may be divided into network devices in the access network RAN, and the CU may be divided into network devices in the core network CN, which is not limited herein.
  • the terminal equipment in the wireless communication system may also be referred to as user equipment (UE), access terminal, 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 terminal device in the embodiment of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal.
  • Equipment wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( A wireless terminal in a transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • the embodiment of the present application does not limit the application scenario.
  • the foregoing terminal device and a chip that can be disposed in the foregoing terminal device are collectively referred to as a terminal device.
  • the network device #1 to the network device #3 and the terminal device are schematically illustrated in FIG. 1 for convenience of understanding, but this should not constitute any limitation to the present application, and the wireless communication system may further include more Or a smaller number of network devices, and may also include a larger number of terminal devices.
  • Network devices that communicate with different terminal devices may be the same network device, or may be different network devices, and networks that communicate with different terminal devices. The number of devices may be the same or different, and this application does not limit this.
  • a network device In a CoMP transmission scenario, a network device usually needs to refer to the CSI fed back by the terminal device to determine a reasonable transmission scheme and scheduling policy.
  • the terminal device may perform CSI measurement and feedback according to a reference signal resource indicated by the network device, for example, a channel state information reference signal (CSI-RS) resource.
  • the CSI may include, for example, a precoding matrix indicator (PMI), a rank indication (RI), and a channel quality indicator (CQI).
  • PMI precoding matrix indicator
  • RI rank indication
  • CQI channel quality indicator
  • the network device #1 111 and the network device #2 112 can simultaneously communicate with the terminal device 121.
  • the network device #1 111, the network device #2 112, and the network device #3 113 can simultaneously communicate with the terminal device 121.
  • the network device may determine various interference measurement assumptions according to other network devices that may have a communication connection around the terminal device, and indicate to the terminal device, so that the terminal device performs CSI measurement according to the multiple interference measurement assumptions.
  • the method of indicating the interference measurement assumption by the network device may bring about a large signaling overhead. For example, if there are S types of interference measurement assumptions, it is possible to indicate S types of interference measurement assumptions to the terminal device by using the S downlink control information, or to indicate the S types in the multiple fields in the same downlink control information. Interference measurement assumptions. One or more interference measurement resources may be indicated in the indication of each interference measurement hypothesis. If there are multiple other network devices that may have a communication connection around the terminal device, the number of interference assumptions may be large, and the signaling overhead caused by this is also very serious.
  • the present application provides a method for measuring channel state information, which can reduce signaling overhead.
  • the method of measuring channel state information provided by the present application is applicable to a wireless communication system, such as the wireless communication system 100 shown in FIG.
  • the terminal device in the embodiment of the present application can communicate with one or more network devices at the same time.
  • the network device in the embodiment of the present application may correspond to the network device #1 111, the network device #2 112, and the network device in FIG.
  • One or more of #3 113, the terminal device in the embodiment of the present application may correspond to the terminal device 121 in FIG.
  • the CSI-RS in the embodiments of the present application is a specific form of the reference signal for CSI measurement, and should not constitute any limitation to the present application. In fact, this application does not exclude the use of other reference signals for CSI measurements, such as demodulation reference signals (DMRS), or reference signals having the same or similar functions as defined in future protocols.
  • DMRS demodulation reference signals
  • the embodiment of the present application is described in detail by taking an interaction process between a terminal device and one or more network devices, where the terminal device may be in a wireless communication system and has a wireless connection relationship with the network device.
  • the terminal device may be in a wireless communication system and has a wireless connection relationship with the network device.
  • Any terminal device It can be understood that any one of the terminal devices in the wireless communication system can perform CSI measurement and feedback based on the same technical solution, which is not limited in this application.
  • FIG. 2 is a schematic flowchart of a method 200 for measuring channel state information provided by an embodiment of the present application, which is shown from the perspective of device interaction. As shown, the method 200 illustrated in FIG. 2 can include steps 210 through 240. The method 200 is described in detail below in conjunction with FIG.
  • step 210 the terminal device receives downlink control information, where the downlink control information carries measurement information for CSI measurement.
  • step 210 the network device sends downlink control information.
  • the network device that sends the downlink control information to the terminal device may be a network device that has a communication connection with the terminal device.
  • the network devices having the communication connection with the terminal device 121 shown in FIG. 1 such as one or more of the network device #1 111, the network device #2 112, and the network device #3 113 .
  • CSI measurement may be performed in advance by sending a CSI-RS to determine a reasonable transmission scheme and scheduling policy.
  • the number of network devices that send downlink control information to the terminal device is not limited in this application.
  • the downlink control information may be DCI (downlink control information) defined in the LTE protocol or the NR protocol, or may be other signaling used to carry downlink control information transmitted in the physical downlink control channel. This application does not limit this.
  • the physical downlink control channel mentioned herein may be a PDCCH (physical downlink control channel) defined in the LTE protocol or the NR protocol, an enhanced physical downlink control channel (EPDCCH), or an NR.
  • the physical downlink control channel may be a physical downlink control channel based on a cell-specific reference signal (CRS) or a physical downlink control channel based on a DMRS.
  • the physical downlink control channel based on the CRS may be a physical downlink control channel demodulated according to the CRS
  • the physical downlink control channel based on the DMRS may be a physical downlink control channel demodulated according to the DMRS.
  • the CRS is a reference signal (Reference Signal, RS) that the network device configures to all the terminal devices in the cell.
  • the DMRS may be an RS configured by the network device to a specific terminal device, and may also be referred to as a terminal device specific reference signal.
  • the physical downlink control channel defined in the NR system may be a physical downlink control channel of the foregoing DMRS.
  • the downlink control information may be uplink related downlink control information.
  • the downlink control information may be a DCI related to the uplink in LTE or NR.
  • the network device may indicate, by using downlink control information, measurement information for CSI measurement to the terminal device.
  • the measurement information includes at least indication information of a CSI-RS resource configuration.
  • the downlink control information carries the indication information of the CSI-RS resource configuration.
  • the terminal device may acquire multiple possible CSI-RS resource configurations in advance through high-layer signaling (for example, radio resource control (RRC) message), for example, the multiple possibilities.
  • the CSI-RS resource configuration can be indicated by multiple resource settings.
  • the terminal device may determine the CSI-RS resource according to the indication field of the CSI-RS resource configuration included in the received downlink control information.
  • the indication field may be, for example, an index of a resource setting, or an indication information that may be used to index a resource setting, such as an index in a CSI request (CSI request) field in a DCI defined in an LTE protocol or an NR protocol.
  • the measurement information carried in the downlink control information further includes indication information of a codebook subset restriction (CSR).
  • CSR codebook subset restriction
  • the indication information of the codebook subset restriction is used to indicate a restricted codebook subset
  • the restricted codebook subset can be understood as a codebook subset currently used by the network device.
  • the codebook subset may include some or all of the codewords in the codebook.
  • the indication information of the CSI-RS resource configuration and the indication information of the codebook subset restriction are carried by the same field.
  • the measurement information may be carried in a certain field of the downlink control information.
  • the CSI request field in the DCI defined in the LTE protocol or the NR protocol.
  • the terminal device may pre-acquire information of multiple CSI-RS resource configurations and codebook subset restrictions through higher layer signaling (eg, RRC message).
  • the CSI-RS resource configuration may be indicated by a resource setting in the RRC
  • the codebook restricted subset may be indicated by a reporting setting in the RRC message.
  • the reporting setting can be used to indicate the CSI that needs to be fed back (or reported) and the resources used by the feedback CSI.
  • the resource setting and the reporting setting may have a corresponding relationship, and the correspondence between the two may be indicated by a link.
  • the terminal device may determine, according to the resource setting, the reporting setting, and the link, the correspondence between the multiple CSI-RS resources and the plurality of codebook subset restrictions, that is, multiple resources are obtained.
  • the network device can indicate an index of a resource setting and an index of a reporting setting through an index.
  • the terminal device may determine the indicated resource setting and reporting setting according to the CSI request field in the received DCI and the pre-acquired mapping relationship, and further determine the CSI-RS resource and the reporting setting corresponding to the resource setting indicated in the DCI.
  • the corresponding codebook subset As described above, the downlink control information has a one-to-one correspondence with the network device, and the CSI-RS resource and the codebook subset determined by the terminal device according to the downlink control information are also used by the network device that sends the downlink control information. CSI-RS resources and codebook subsets.
  • the terminal device may perform different types of CSI measurement according to the quantity of downlink control information received within a preset time period. Specifically, the terminal device may perform step 220 (including 2201 or step 2202) described below.
  • a downlink control information is received in the preset time period, and the terminal device performs CSI measurement based on only the measurement information carried in one downlink control information, otherwise, based on at least two received in the preset time period.
  • the measurement information carried in the downlink control information is subjected to each CSI measurement.
  • the terminal device may use the time when the downlink control information is received for the first time as the starting time, and the time when the starting time extends backward for a preset time period may be used as the ending time, where the starting time is The time interval to the end time is a preset time period.
  • the terminal device can receive the downlink control information from the network device in real time. After the end of a preset time period, the time when the terminal device receives the downlink control information again can be regarded as the start time of the next preset time period, and is received again.
  • the downlink control information can be regarded as the first downlink control information of the next preset time period.
  • the time from the start time to the back of the preset time period can be used as the end time.
  • the time interval from the start time to the end time is a preset time period.
  • it can be understood as the last preset time period.
  • the starting time of one preset time period may be the time when the first downlink control information is received after the end time of the last preset time period.
  • the terminal device may directly use the time domain resource defined by the communication system as the preset time period.
  • a time unit defined by the communication system is taken as a preset time period.
  • the time unit may be, for example, a subframe, a slot, a radio frame, a mini slot or a sub slot, a plurality of aggregated slots, a plurality of aggregated subframes, symbols, and the like, and even It may be a transmission time interval (TTI), which is not limited in this application.
  • TTI transmission time interval
  • the preset time period can be one time slot defined in the communication system.
  • the terminal device may receive only one downlink control information or multiple downlink control information within a preset time period.
  • the terminal device can selectively perform one or both of the following steps 2201 or 2202 according to the number of downlink control information received within a preset period of time.
  • the size of the preset time period may be that the network device notifies the terminal device in advance, for example, the terminal device is notified by the network device, and may be predefined, for example, a protocol definition.
  • the preset time period may be one or more time units.
  • the size of the preset time period is one or more time slots.
  • each time unit enumerated above may be defined according to the LTE protocol or the NR protocol, or may be defined according to a future protocol.
  • the size of the time unit is not limited in this application. It should be understood that the size of the preset time period listed above is only an exemplary description, and should not be construed as limiting the present application. The size of the preset time period is not limited.
  • the M downlink control information may be from M network devices, in other words, the M downlink control information and
  • the M network devices may have a one-to-one correspondence, and each network device may send one downlink control information, and the downlink control information sent by each network device may carry measurement information for CSI measurement.
  • the measurement information carried in the downlink control information sent by the network device #1 in FIG. 1 includes at least the indication information of the CSI-RS resource configuration, to indicate the resource location of the CSI-RS sent by the network device #1, or Indicates the resource location where the CSI-RS is received.
  • step 2201 a plurality of downlink control information is received in a preset time period, and the terminal device performs each CSI measurement based on the measurement information carried in the at least two downlink control information received in the preset time period.
  • the terminal device may perform each CSI measurement according to the measurement information carried by the downlink control information of N (M ⁇ N ⁇ 2, N is an integer) of the M downlink control information received in the preset time period, and obtain multiple CSIs.
  • Each CSI of the multiple CSIs may be obtained by performing CSI measurement based on measurement information carried by at least two downlink control information received in the preset time period.
  • the plurality of CSIs may be obtained by performing CSI measurement on a plurality of network devices, where the plurality of network devices may be network devices corresponding to some or all of the N downlink control information.
  • the number of downlink control information on which any two CSI measurements are based may be different. That is to say, in the multiple CSI measurement, the value of the number N of downlink control information on which it is based may be different.
  • the terminal device may perform multiple CSI measurements for multiple downlink control information received in a preset time period, and each CSI measurement may be a measurement carried based on at least two downlink control information of the multiple downlink control information. Information is performed, that is, each CSI measurement may be a CSI measurement for one of a plurality of network devices.
  • the terminal device may be configured to receive the downlink control information from the M network devices within the preset time period.
  • the terminal device may perform each CSI measurement based on the measurement information carried in the N downlink control information of the M downlink control information.
  • the plurality of network devices may include, for example, a first network device and a second network device.
  • step 210 may specifically include:
  • Step 2101 The terminal device receives downlink control information from the first network device within a preset time period.
  • Step 2102 The terminal device receives downlink control information from the second network device within a preset time period.
  • the terminal device After the first network device and the second network device respectively send downlink control information to the terminal device, it is possible to send the CSI-RS based on the CSI-RS resources indicated in the downlink control information that is sent separately, so that the terminal device performs CSI measurement, thereby Prepare for subsequent resource scheduling, etc.
  • the CSI-RS sent by the other network device may become an interference signal of the network device.
  • the CSI-RS sent by the first network device may become an interference signal of the second network device
  • the CSI-RS sent by the second network device may become an interference signal of the first network device. Therefore, the terminal device may perform CSI measurement on the multiple network devices to obtain multiple CSIs to be fed back to multiple network devices, and each CSI in the multiple CSIs may be based on measurements carried in the multiple downlink control information. Information is measured.
  • the first network device and the second network device are taken as an example to describe a process in which multiple network devices send downlink control information and CSI-RS to the terminal device, but this should not be
  • the application constitutes any limitation, and the terminal device may also receive downlink control information sent by more or less network devices within a preset time period.
  • the number of the network device that sends the downlink control information to the terminal device is not limited, or the number of the downlink control information received by the terminal device is not limited.
  • the terminal device may perform each CSI measurement based on the measurement information carried in the N downlink control information. Specifically, the terminal device may perform CSI measurement based on the measurement information carried in the N downlink control information for the mth (0 ⁇ m ⁇ M) downlink control information of the M downlink control information.
  • the mth downlink control information of the M downlink control information and the nth downlink control information of the N downlink control information may have a corresponding relationship.
  • the terminal device is respectively recorded as: downlink control information #1, downlink control information #2, and downlink control information. #3, downlink control information #4 and downlink control information #5.
  • the downlink control information may be downlink control information #1, downlink control information #3, and downlink control information #5 among the five downlink control information.
  • the terminal device may associate the mth of the M downlink control information with the nth of the N downlink control information according to a preset rule.
  • the downlink control information #1 of the five downlink control information is the first downlink control information of the five downlink control information, and the downlink of the five downlink control information.
  • Control information #2 is the second downlink control information among the five downlink control information, and so on.
  • the downlink control information #1 of the three downlink control information is the first downlink control information of the three downlink control information
  • the downlink control information #3 of the three downlink control information is the third The second downlink control information of the downlink control information
  • the downlink control information #5 of the three downlink control information is the third downlink control information of the three downlink control information.
  • the first downlink control information of the N downlink control information is the first downlink control information of the M downlink control information
  • the second downlink control information of the N downlink control information is the The third downlink control information of the M downlink control information
  • the third downlink control information of the N downlink control information is the fifth downlink control information of the M downlink control information.
  • m may take one or more values in [1, M], that is, the terminal device may perform CSI measurement separately for one or more of the M downlink control information, or the terminal device may target the M One or more of the M network devices corresponding to the downlink control information respectively perform CSI measurement; m may also take each value of [1, M], that is, the terminal device may be for M downlink control Each of the downlink control information in the information is subjected to CSI measurement, or the terminal device can perform CSI measurement for each of the M network devices, which is not limited in this application.
  • the CSI-RS resource indicated by the downlink control information except the nth downlink control information may be used as the nth downlink control information in the process of performing CSI measurement on the nth downlink control information.
  • the CSI-RS resources indicated by the remaining N-1 downlink control except the nth downlink control information of the N downlink control information may be the interference measurement resources of the CSI-RS resources indicated by the nth downlink control information.
  • the CSI-RS resources indicated by the downlink control information may be interference measurement resources of the CSI-RS resources indicated by the nth downlink control information.
  • CSI measurement combined with measurement information carried in multiple downlink control information may be referred to as multi-site based CSI measurement.
  • Multi-site based CSI measurements can be understood as a type of measurement of CSI.
  • the terminal device may perform CSI measurements in conjunction with CSI-RS from a certain network device (eg, the first network device) and CSI-RS from one or more other network devices (eg, the second network device). If the CSI measurement is a CSI measurement for the first network device, the measured CSI is fed back to the first network device.
  • the CSI-RS from the second network device can be considered an interference signal.
  • the terminal device may perform CSI measurement according to the CSI-RS resource of the first network device and the CSI-RS resource of the second network device, and obtain a CSI to be fed back, for example, a CQI.
  • the terminal device may perform CSI measurement in combination with the codebook subset indicated by the multiple downlink control information.
  • the terminal device may perform CSI measurement based on the codebook subset indicated by at least two downlink control information of the M downlink control information.
  • the M downlink control information part or all of the CSI-RS resources indicated by the remaining M-1 downlink control information except the nth downlink control information of the N downlink control information may be the nth downlink.
  • the codebook subset indicated by the downlink control information except the nth downlink control information in the N downlink control information may be used to precode the CSI-RS as the interference signal, and the nth of the N downlink control information
  • the codebook subset indicated by the downlink control information may be used to precode the CSI-RS carried on the CSI-RS resource indicated by the nth downlink control information.
  • the terminal device may perform precoding on the interference signal by traversing the codebook subset indicated by the N-1 downlink control information except the nth downlink control information, and traverse the indication indicated by the nth downlink control information.
  • the codebook subset precodes the CSI-RS corresponding to the nth downlink control information.
  • nth downlink control information and the mth downlink control information of the M downlink control information has been described in detail above with reference to the examples, and details are not described herein again.
  • m can take one or more values in [1, M], or take each value in [1, M] to determine the optimal The precoding matrix, ie the CSI to be fed back, eg PMI.
  • the number of downlink control information used to determine the interference measurement resource and the number of downlink control information corresponding to the codebook subset used for precoding the interference signal may be the same or different.
  • the terminal device may send a CSI-RS to the first network device according to a codebook subset of the first network device (referred to as a first codebook subset for convenience of distinction and description) (for convenience of distinction and description, for example, Performing precoding on the first CSI-RS to obtain a pre-coded first CSI-RS, and according to the codebook subset of the second network device (for convenience of distinction and description, recorded as the second codebook subset)
  • the CSI-RS transmitted by the second network device (for convenience of distinction and description, for example, referred to as a second CSI-RS) is precoded to obtain a precoded second CSI-RS.
  • the pre-coded first CSI-RS is used as the pre-coded second CSI-RS interference signal
  • the pre-coded second CSI-RS is used as the pre-coded first CSI-RS as the pre-coded Interleaving the first CSI-RS interference signal to calculate a CQI corresponding to the first network device and a CQI corresponding to the second network device, respectively, by traversing the first codebook subset and the second codebook subset, respectively Determining a precoding matrix in the first codebook subset and a precoding matrix in the second codebook subset respectively used when the CQI corresponding to the two network devices is optimal, and respectively feeding the two precoding matrices to Network equipment.
  • the first network device and the second network device are named only for convenience of distinction, and should not be construed as limiting the application.
  • the first network device and the second network device may be opposite.
  • the first network device may be a network device for which the terminal device performs CSI measurement, and may be any one of the network devices in the collaboration set.
  • the second network device may be one or more network devices in the collaboration set other than the first network device.
  • a collaboration set can be understood as a set of potential network devices that may subsequently perform data transmission with the terminal device.
  • the network device #1, the network device #2, and the network device #3 transmit the CSI-RS to the terminal device for a certain period of time, that is, Network device #1, network device #2, and network device #3 may transmit data with the terminal device in the future.
  • the terminal device can perform CSI measurement for the network device #1, the network device #2, and the network device #3, respectively. If the CSI measurement is performed for the network device #1, the network device #1 may be the first network device, and the network device #2 and the network device #3 may be the second network device; if the CSI measurement is performed for the network device #2, the network Device #2 may be the first network device, network device #1 and network device #3 may be the second network device; and so on.
  • the CSI-RS from the network device #1 can be used as a target signal, and the CSI-RS from the network device #2 and the network device #3 can be used as an interference signal to perform CSI.
  • the CSI measured by the CSI measurement is the CSI fed back to the network device #1.
  • the network device #1 can be understood as an example of the first network device, and the network device #2 and the network device #3 can be understood as two examples of the second network device.
  • each downlink control information of the multiple downlink control information carries a reporting setting. That is, each downlink control information may carry an indication information of a resource setting and an indication information of a reporting setting, wherein the resource setting and the reporting setting may be indicated by the same indication information.
  • each downlink control information may carry a resource setting indication information, but only one downlink control information may carry multiple indication information of the reporting setting, and the indication information of the multiple reporting settings is used to indicate multiple
  • the reporting setting may be in one-to-one correspondence with the plurality of network devices corresponding to the multiple downlink control information, and may be used to indicate CSI and feedback CSI resources that need to be fed back to the multiple network devices respectively.
  • the multiple reporting settings may also be used to indicate multiple CSRs, which may be in one-to-one correspondence with multiple network devices, and the codebook subset used by each network device may be indicated by one CSR.
  • each downlink control information of the multiple downlink control information carries a reporting setting. That is, each downlink control information may carry a resource setting indication information, but only one downlink control information (referred to as downlink control information #A for convenience of distinction and description) may carry a reporting information of a reporting setting.
  • downlink control information #A for convenience of distinction and description
  • the reporting information of the reporting setting indicates a reporting setting
  • the reporting setting may be used to indicate CSI that needs to be fed back (for example, including but not limited to one or more of PMI, CQI, or RI) and resources for feeding back CSI, that is, for
  • the type of CSI reported by each network device may be the same, and the CSI measured by the multiple network devices may be fed back to the same network device by using the indicated resource of the feedback CSI, for example, sending the downlink control information.
  • the reporting setting may also be used to indicate a CSR, that is, multiple network devices may use the same codebook subset.
  • each CSI measurement may be performed based on the measurement information carried in the multiple downlink control information, that is, the CSI measurement based on multiple sites.
  • the CSI measurement may also be independently performed based on the measurements carried in each of the plurality of downlink control information, that is, based on the single site CSI measurement.
  • step 2202 a downlink control information is received in the preset time period, and the terminal device performs CSI measurement based only on the measurement information carried in the one downlink control information.
  • the terminal device may be considered to receive only one network device within a preset time period (for convenience of distinction and description, the first Downlink control information of the three network devices.
  • step 210 may specifically include:
  • Step 2103 The terminal device receives downlink control information from the third network device within a preset time period.
  • the terminal device may only transmit data with this network device in the next time period, so the terminal device may only receive the CSI-RS from the third network device.
  • the signals of other network devices are considered to be noise signals. Therefore, the terminal device may perform CSI measurement on the third network device to obtain CSI to be fed back, and the CSI may be measured based on measurement information carried in only one downlink control information.
  • CSI measurement based on measurement information carried in one downlink control information may be referred to as single-site based CSI measurement.
  • Single site based CSI measurements can be understood as another type of measurement of CSI.
  • the third network device is named only for facilitating the distinction between the first network device and the second network device in the above, and should not be construed as limiting the application.
  • the third network device is not associated with the first network device and the second network device.
  • the third network device may be any one of the wireless communication systems that transmits downlink control information to the terminal device.
  • the network device #1 may be the third network device.
  • the network device #3 transmits the CSI-RS to the terminal device at a certain time period, that is, the network device #3 may transmit data with the terminal device in the next time period, the terminal device may perform CSI measurement for the network device #3.
  • the terminal device may also receive downlink control information from more or less network devices within a preset time period. Regardless of which network device the downlink control information received by the terminal device is received within the preset time period, the terminal device may perform CSI measurement according to the method described in step 2201 or step 2202 above.
  • the terminal device may perform CSI measurement by using different measurement types according to the number of downlink control signals received within a preset time period. Therefore, the network equipment does not need additional signaling overhead to indicate various interference measurement assumptions, but the terminal device autonomously determines the measurement type, which can greatly save signaling overhead. Moreover, the measurement type thus determined can obtain more accurate CSI feedback to the network device, thereby facilitating the network device to determine a reasonable transmission scheme and scheduling strategy, that is, improving the reliability of data transmission and improving system performance.
  • the method 200 further includes: determining, by the terminal device, the quantity of downlink control information received in the preset time period according to the received signal strength of the downlink control information and the preset threshold.
  • the terminal device When the terminal device receives the downlink control information, it may incorrectly receive the downlink control information sent to other terminal devices, and mistype the received downlink control information as the downlink control information sent to itself, and counts into the preset time period. Among the number of downlink control signals received, this may cause the terminal device to make an error in the selection of the measurement type. In this case, the terminal device may not receive the CSI-RS transmitted by the network device corresponding to the downlink control information. That is to say, the downlink control information that the terminal device incorrectly receives should not be included in the number of downlink control signals received within the preset time period. To prevent the terminal device from selecting the wrong measurement type for CSI measurement, the terminal device may determine the number of downlink control signals received within the preset time period according to the received signal strength of the downlink control information and the preset threshold.
  • the received downlink control information when the signal strength of the downlink control information received by the terminal device in the preset time period is greater than or equal to the preset threshold, the received downlink control information may be included in the downlink received within the preset time period. In the quantity of control information; when the signal strength of a certain downlink control information received by the terminal device in the preset time period is less than the preset threshold, the received downlink control signal may be ignored, and is not counted in the preset time period. The number of downlink control information received within.
  • the preset threshold may be determined by the network device after the network device determines the signaling, or may be predefined, for example, a protocol definition.
  • the method for determining the preset threshold and the value are not limited.
  • determining, by the terminal device, the number of downlink control information received within the preset time period according to the signal strength and the preset threshold of the downlink control signal is only one possible implementation manner, and should not be construed as limiting the present application.
  • the terminal device may also determine the number of downlink control information received within the preset time period based on other methods.
  • the method 200 further includes: the terminal device receiving the first indication information, where the first indication information indicates whether to perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the first indication information indicates whether the CSI measurement is performed based on the measurement information carried in the downlink control information, or the first indication information indicates whether the CSI measurement is performed based on the measurement information carried in the downlink control information or based on at least The measurement information carried in the two downlink control information is subjected to CSI measurement.
  • the first indication information can be used to indicate the type of measurement.
  • the measurement type may include single site based CSI measurement or multi-site based CSI measurement, wherein in single site based CSI measurement, CSI measurement is performed based on measurement information carried in one downlink control information, based on multi-site CSI measurement Each CSI measurement is performed based on measurement information carried in multiple downlink control information.
  • the first indication information may be sent by any one of the network devices that have a communication connection with the terminal device, for example, a network device that has established an RRC connection with the terminal device.
  • the first indication information may be carried by one or more signaling messages in an RRC message, a media access control (MAC) control element (CE), or downlink control information.
  • the terminal device may perform corresponding CSI measurement according to the measurement type indicated by the first indication information.
  • the first indication information may be an indication bit.
  • the network device and the terminal device may pre-arrange, when the indication bit is set to “1”, indicate that the measurement type is CSI measurement based on measurement information carried in at least two downlink control information, or, based on multi-site CSI. Measurement; when the indication bit is set to "0", the measurement type is indicated as CSI measurement based on measurement information carried in one downlink control information, or based on single site CSI measurement.
  • the first indication information is schematically given here for ease of understanding, but this should not constitute any limitation to the application, and the first indication information may also be in other forms to indicate the measurement type. , for example, indicated by different fields in the same signaling, and so on.
  • the terminal device may select a measurement type to perform CSI measurement according to the number of downlink control information received in the preset time period and the first indication information. Specifically, if the terminal device receives multiple downlink control information within a preset time period, and the measurement type indicated by the first indication information is CSI measurement based on the measurement information carried in the at least two downlink control information, the terminal device may The CSI measurement is performed according to the measurement information carried in the received multiple downlink control information; if the terminal device receives a downlink control information within a preset time period, and the measurement type indicated by the first indication information is carried in a downlink control information.
  • the CSI measurement of the measurement information the terminal device may perform the CSI measurement according to the measurement information carried in the received downlink control information; if the terminal device receives the multiple downlink control information within the preset time period, the first indication
  • the measurement type indicated by the information is CSI measurement based on the measurement information carried in the downlink control information, and the terminal device may separately perform CSI measurement based on the measurement information in each of the received downlink control information.
  • CSI measurement is performed separately for each downlink control information; Receiving a downlink control information in a preset time period, and the measurement type indicated by the first indication information is a CSI measurement based on the measurement information carried in the at least two downlink control information, the terminal device may combine the previously received another The CSI measurement is performed by one or more downlink control information, or the terminal device may wait for another downlink control information received subsequently for CSI measurement.
  • the terminal device may determine downlink control information received before or after the preset time period according to a predetermined duration threshold. Specifically, it is assumed that the terminal device receives only one downlink control information in the preset time period #1, but the measurement type indicated by the network device is CSI measurement based on the measurement information carried in the at least two downlink control information, the terminal device may Extending a time duration threshold at a starting time of the preset time period #1, and performing one or more downlink control information received in the time period covered by the time length threshold to perform CSI measurement; or, the terminal device may be in a preset time period The end time of #1 is extended backward by a duration threshold, and the CSI measurement is performed in combination with one or more downlink control information received during the period covered by the duration threshold.
  • the CSI measurement may be performed based on the measurement information carried in the downlink control information, or may not be measured.
  • duration threshold may be previously notified by the network device to the terminal device, or may be determined by the terminal device, or may be predefined, for example, a protocol definition, which is not limited in this application.
  • the terminal device can perform CSI measurement according to the measurement type indicated by the network device, so that the autonomy of the network device is enhanced, and the network device can instruct the terminal device to perform corresponding CSI measurement according to the current requirement, so that the network device determines a reasonable transmission.
  • the scheme and scheduling strategy are conducive to improving the reliability of data transmission.
  • the method 200 further includes:
  • Step 230 The terminal device sends CSI, and the CSI is measured based on measurement information carried in one or at least two downlink control information.
  • the terminal device can carry the CSI through the CSI report.
  • the terminal device may specifically feed back the CSI to the network device by using any one of the implementation manners provided below.
  • the CSI reports involved in the different implementation manners are respectively the first CSI report and the second CSI report. It should be understood that the first CSI report and the second CSI report are named only for facilitating different feedback modes, and should not constitute any limitation on the order of CSI transmission, the number of CSIs, and the like.
  • the CSI report (e.g., referred to as the first CSI report) can include a first field that can be used to carry one or more CSIs.
  • each CSI may be measured based on measurement information carried in one downlink control information, that is, CSI based on single site CSI measurement; or may be based on at least two The measurement information carried in the downlink control information is measured, that is, the CSI obtained based on the CSI measurement of the multi-site.
  • the CSI measurement may be based on CSI measurement of measurement information carried in one downlink control information, it may also be CSI measurement based on measurement information carried by at least two downlink control information, but the network device may not know that the CSI measurement is received.
  • the CSI is measured by which measurement type is adopted, and therefore, the terminal device can indicate the measurement type of the CSI measurement while feeding back the CSI.
  • the terminal device may indicate, by means of an explicit indication or an implicit indication, the measurement type of the CSI carried in the first field to the network device.
  • the first CSI report may further include a second field, where the second field is used to indicate a measurement type on which the CSI carried in the first field is based.
  • the second field may be an indication field of one bit.
  • the indication field is set to “1”
  • the CSI carried by the first field may be measured based on measurement information carried in the at least two downlink control information;
  • the field is set to "0”
  • the CSI carried by the first field is measured based on the measurement information carried in the downlink control information.
  • the terminal device may carry the CSIs of the two measurement types in the same field, and indicate the measurement type by using an indication bit pre-agreed with the network device, and the network device receives the first
  • a reasonable transmission scheme and scheduling policy can be determined according to the measurement type indicated in the second field and the CSI carried in the first field.
  • the terminal device may determine a resource for feeding back CSI according to the information received in advance, and send the CSI on the resource of the feedback CSI. For example, the terminal device may determine the resource for feeding back the CSI according to the CSI reporting setting indicated by the downlink control information received in step 210.
  • each downlink control information may carry the indication information of one CSI reporting setting, or may carry the indication information of multiple CSI reporting settings through only one downlink control information, or may only pass one downlink control information. Carry a CSI reporting setting.
  • each downlink control information may indicate a resource that feeds back the CSI, and the terminal device may feed back the corresponding CSI based on the resource of the feedback CSI indicated by each downlink control information. For example, the CSI measured for the nth downlink control information is reported by the CSI feedback resource indicated in the nth downlink control information.
  • the downlink control information may be used to indicate the resources of the multiple feedback CSIs, and the resources of the multiple feedback CSIs may be corresponding to the multiple CSIs, and the terminal device may The corresponding CSI is fed back on the resources of each feedback CSI.
  • the downlink control information may indicate a resource that feeds back the CSI, and the terminal device may pass the CSI obtained by each CSI measurement through the feedback indicated by the downlink control information. CSI resources are reported.
  • the CSI measured by the network device can be fed back to the network device, for example, the CSI measured for the first network device is fed back to the first network.
  • the device may also feed back the CSI measured by the one or more network devices to the same network device, where the network device may be a network device indicating the resource for feeding back the CSI, and the CSI may be separately sent to the CSI through the network device.
  • Network device corresponding to each CSI For example, the CSI measured separately for the first network device and the second network device is fed back to the serving network device.
  • step 230 specifically includes:
  • the terminal device sends a plurality of first CSI reports, where the first field in each of the first CSI reports includes a CSI, and the CSI may be based on measurement information carried in the at least two downlink control information.
  • the measurement is obtained, or it may be measured based on measurement information carried in a downlink control information.
  • step 230 specifically includes one or more steps of step 2301, step 2302, and step 2303:
  • Step 2301 the terminal device sends a first CSI report to the first network device, where the first CSI report carries the CSI measured for the first network device (for convenience of distinction and description, it is recorded as CSI#1);
  • Step 2302 The terminal device sends a first CSI report to the second network device, where the CSI (for CSC#2) is measured for the second network device.
  • step 230 specifically includes:
  • Step 2303 The terminal device sends a first CSI report to the third network device, where the first CSI report carries the CSI measured for the third network device (referred to as CSI#3 for convenience of distinction and description).
  • the foregoing CSI may be measured based on measurement information carried in at least two downlink control information, or may be measured based on measurement information carried in one downlink control information. get.
  • the first network device, the second network device, and the third network device are taken as an example, and the terminal device is schematically shown to the first network device and the second network, respectively.
  • the step of transmitting the CSI by the device and the third network device should not constitute any limitation to the application.
  • the terminal device may perform one or more steps in steps 2301 to 2303, and may also perform the steps. More steps from 2301 to 2303, for example, sending CSI to more network devices.
  • the first field in each first CSI report may carry a CSI measured based on one or more downlink control information.
  • the terminal device receives multiple downlink control information within a preset time period, the network device does not indicate the measurement type, or the network device indicates that the measurement type is based on the measurement information carried in the at least two downlink control information.
  • the terminal device may perform CSI measurement based on the measurement information carried in the at least two downlink control information of the multiple downlink control information, and report the CSI corresponding to each network device to each network device.
  • the terminal device receives multiple downlink control information within a preset time period, and the network device indicates that the measurement type is CSI measurement based on the measurement information carried in one downlink control information, and the terminal device is based on each The CSI measurement is performed on the measurement information carried in the downlink control information, and the CSI corresponding to each network device is reported to each network device.
  • a further possible situation is that the terminal device receives multiple downlink control information within a preset time period, but the terminal device may perform CSI measurement and feedback only for the network device corresponding to one of the downlink control information, the CSI measurement.
  • the CSI measurement may be based on the measurement information carried in the downlink control information, or may be the CSI measurement based on the measurement information carried in the at least two downlink control information, and the measured result may be reported to the network device for each measurement. It is to be understood that the above list may be merely illustrative for ease of understanding and should not be construed as limiting.
  • step 230 specifically includes:
  • the terminal device sends a first CSI report, where the first field in the first CSI report may include at least one CSI measured based on measurement information carried by one downlink control information, or at least one is carried based on at least two downlink control information.
  • the measured information is measured by the CSI obtained.
  • a possible situation is that the terminal device receives a downlink control information within a preset time period, the network device does not indicate the measurement type, or the network device indicates that the measurement type is a CSI measurement based on the measurement information carried in one downlink control information, The terminal device performs CSI-based measurement based on the measurement information carried in the one downlink control information. In this case, the terminal device may feed back the measured CSI to the network device or feed back to the same network device, for example, the serving network device.
  • the terminal device receives multiple downlink control information in a preset time period, the network device does not indicate the measurement type, or the network device indicates that the measurement type is based on the measurement information carried in the at least two downlink control information.
  • the CSI measurement the terminal device performs CSI-based measurement based on the measurement information carried in the at least two downlink control information received in the preset time period; and another possibility is that the terminal device receives more than the preset time period.
  • the downlink control information the network device indicates that the measurement type is CSI measurement based on the measurement information carried in one downlink control information, and the terminal device separately performs CSI measurement based on the measurement information carried in each downlink control information.
  • the terminal device may perform the CSI measurement based on the single site based on the measurement information carried in the at least two downlink control information received in the preset time period. Or performing multi-site based CSI measurement, the measured CSI can be fed back to the same network device, for example, a service network device.
  • the terminal device performs multi-site based CSI measurement for the first network device and the second network device, respectively, obtaining CSI #1 for the first network device and CSI #2 for the second network device.
  • the terminal device may carry both CSI #1 and CSI #2 in a first field of a first CSI report, and send the first CSI report to a serving network device of the terminal device.
  • the terminal device may carry the CSI #1 in the first CSI report sent to the first network device, and carry the CSI #2 in the first CSI report sent to the second network device.
  • CSI #3 for the third network device is obtained.
  • the terminal device may carry the CSI #3 in the first field of the first CSI report, and send the first CSI report to the third network device, or to the serving network device.
  • the first field in the first CSI report may be used to carry CSI measured based on measurement information carried in at least two downlink control information, that is, CSI based on multi-site CSI measurement, or the first field may be used for Carrying a predefined value; the predefined value is used to implicitly indicate that the terminal device does not perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the terminal device may only report the CSI measured by the multi-site CSI measurement, and when the CSI measurement is performed based on the single site, the terminal device may be implicitly indicated by the predefined value pre-defined with the network device.
  • the resulting CSI is not based on multi-site CSI measurements, ie, CSI based on single-site CSI measurements is not reported.
  • the number of CSIs carried in the first field may be one or more, which is not limited in this application.
  • the CSI measured by the network device may be fed back to the network device, for example, the CSI measured by the first network device is fed back to the first network device;
  • the CSIs respectively measured for one or more network devices may be fed back to the same network device, for example, the CSIs respectively measured for the first network device and the second network device are fed back to the serving network device.
  • step 230 specifically includes:
  • the terminal device sends a first CSI report, where the first CSI report includes a first field, where the first field includes at least one CSI measured based on the at least two downlink control information, or a predefined value; the predefined value implicitly indicates The terminal device does not perform CSI measurement based on the measurements carried in the at least two downlink control information.
  • the first field carries a predefined value, it indicates that the terminal device may perform single-site based CSI measurement based on the measurement information carried in one downlink control information. In this case, the terminal device may not report the CSI measured based on the single station CSI.
  • step 230 specifically includes:
  • the terminal device sends a plurality of first CSI reports, where each of the first CSI reports includes a first field, where the first field includes a measurement information that is carried based on the at least two downlink control information.
  • CSI or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on the measurements carried in the at least two downlink control information.
  • the specific process of the terminal device feeding back the CSI to the network device is similar to the specific process of the terminal device feeding back the CSI to the network device in the manner of displaying the indication.
  • the specific process has been detailed in the above. For the sake of brevity, it will not be repeated here.
  • the CSI report (for example, recorded as the second CSI report) may include a third field and a fourth field, where the third field may be used to carry measurement information carried based on one or at least two downlink control information.
  • the measured CSI that is, CSI based on single-site CSI measurement or CSI based on multi-site CSI measurement
  • the fourth field is only used to carry CSI measured based on measurement information carried by one downlink control information, that is, CSI based on single site CSI measurements.
  • the terminal device when the terminal device receives the plurality of downlink control information in the preset time period, the terminal device may perform the multi-site based on the measurement information carried in the at least two downlink control information received in the preset time period.
  • the CSI measurement can also perform single-site based CSI measurement based on the measurement information carried in each downlink control information.
  • the CSI measured based on the multi-site CSI may be carried in the third field, and the CSI obtained based on the CSI measurement of the single station may be carried in the fourth field.
  • the CSI obtained by the CSI measurement based on the measurement information carried in the downlink control information in the fourth field may be pre-agreed by the network device and the terminal device, and the network device may receive the second CSI.
  • the CSI in the fourth field is obtained based on single site CSI measurements. Since the network device may not know whether the CSI carried in the third field in the received second CSI report is based on single-site CSI measurement or multi-site based CSI measurement, the network device may feedback CSI.
  • the measurement type on which the CSI carried by the third field is based is indicated. Specifically, the terminal device may indicate, by means of an explicit indication or an implicit indication, the measurement type of the CSI carried in the first field to the network device.
  • the second CSI report may further include a fifth field, where the fifth field is used to indicate a measurement type on which the CSI carried in the third field is based.
  • the fifth field may be an indication field of one bit.
  • the indication field is set to “1”
  • the CSI carried by the third field may be measured based on the measurement information carried in the at least two downlink control information, that is, based on The multi-site CSI measurement is obtained.
  • the indication field is set to “0”
  • the CSI carried by the third field may be measured based on the measurement information carried in the downlink control information, that is, based on the single-site CSI measurement.
  • the terminal device may carry the CSI measured based on the two measurement types in the second CSI report, and indicate the measurement type by using an indication bit pre-agreed with the network device, and the network device is receiving.
  • a reasonable transmission scheme and a scheduling policy may be determined according to the measurement type based on the CSI in the third field indicated in the fifth field and the CSI carried in the third field and the fourth field.
  • the network device and the terminal device may pre-arrange the CSI that preferentially carries the measurement information carried based on the multiple downlink control information in the third field, that is, if the terminal device obtains the CSI through the multi-site based CSI measurement (for convenience, for example, Recorded as CSI#A), the CSI#A is preferentially carried in the third field, and the terminal device can simultaneously obtain the CSI through the single-site based CSI measurement (for convenience of distinction and description, for example, as CSI#B), The CSI #B is carried in the fourth field.
  • the CSI#B may be simultaneously carried in the third field and the fourth field.
  • the network device may compare the information carried in the third field and the fourth field, and if the information carried in the third field and the fourth field is different, the terminal device is considered to be based on Multi-site CSI measurement, the CSI carried in the third field is obtained based on multi-site CSI measurement; when the information carried in the third field and the fourth field is the same, the terminal device is considered to be based on multi-site For CSI measurements, CSI is obtained only by single site based CSI measurements.
  • the terminal device does not require additional bit overhead to indicate the type of measurement on which the CSI carried in the third field is based.
  • the number of CSIs carried in the third field and the fourth field may be one or more, which is not limited in this application.
  • the CSI measured by the network device can be fed back to the network device, for example, the CSI measured by the first network device is fed back to the first network device;
  • the CSI measured separately for the one or more network devices may also be fed back to the same network device, for example, the CSI measured separately for the first network device and the second network device is fed back to the serving network device.
  • step 230 specifically includes:
  • the terminal device sends a plurality of second CSI reports, where a third field in each of the second CSI reports is used to carry at least one measurement information carried based on one or at least two downlink control information.
  • the CSI, the fourth field in each second CSI report of the multiple second CSI reports is used to carry at least one CSI measured based on measurement information carried only by one downlink control information.
  • step 230 specifically includes:
  • the terminal device sends a second CSI report, where the third field in the second CSI report is used to carry multiple CSIs measured based on measurement information carried by one or more downlink control information, and the fourth CSI report The field is used to carry multiple CSIs measured based on measurement information carried by one downlink control information.
  • step 230 regardless of whether the terminal device sends one or more CSI reports (for example, the first CSI report or the second CSI report), only one CSI report may be received for each network device.
  • One or more CSIs may be carried in the CSI report received by the network device.
  • the one or more CSIs may be CSIs measured based on measurement information carried by one downlink control information, or may be CSIs measured based on measurement information carried by at least two downlink control information.
  • the network device receives the CSI, including:
  • the network device receives the first CSI report, where the first CSI report includes a first field and a second field, where the first field includes at least one CSI measured according to measurement information carried in one or at least two downlink control information, and the second field Indicates the type of measurement on which the CSI in the first field is based.
  • the network device receives the CSI, including:
  • the network device receives the first CSI report, where the first CSI report includes a first field, where the first field includes at least one CSI measured according to the measurement information carried in the at least two downlink control information, or a predefined value; the predefined value is hidden
  • the method indicates that the terminal device does not perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the network device receives the CSI, including:
  • the network device receives the second CSI report, where the second CSI report includes a third field and a fourth field, where the third field is used to carry at least one CSI measured according to measurement information carried by one or at least two downlink control information, and the fourth field It is used to carry at least one CSI measured based on only one CSI-RS resource.
  • the second CSI report further includes a fifth field, where the fifth field indicates a measurement type on which the CSI carried in the third field is based.
  • the method 200 further includes:
  • step 240 the network device determines the type of measurement on which the received CSI is based.
  • the network device may be the first network device listed above, and the step 240 may include: Step 2401, the first network device may determine a measurement type on which the CSI #1 is based; or the network device may also be In the second network device enumerated above, step 240 may include: step 2402, the second network device may determine the type of measurement on which the CSI #2 is based; or the network device may also be the third network device listed above Step 240 may include, in step 2403, the third network device may determine the type of measurement on which CSI #3 is based.
  • the steps performed by the first network device, the second network device, and the third network device are respectively shown in the figure for convenience of understanding, but this should not constitute any limitation to the present application. In actual implementation, the network device Only one of steps 2401 to 2403 may be performed.
  • the terminal device can transmit CSI to one or more network devices.
  • the measurement type on which the CSI received by the network device is based may include: CSI measurement based on measurement information carried by one downlink control information, or CSI measurement based on measurement information carried by multiple downlink control information.
  • the terminal device can send the CSI to the terminal device by using any one of the first CSI report or the second CSI report, and after receiving the CSI from the terminal device in step 230, the network device can a defined indicator field (eg, a second field in the first CSI report or a fifth field in the second CSI report) or a predefined rule (eg, a predefined value in the first CSI report or a second CSI report)
  • a defined indicator field eg, a second field in the first CSI report or a fifth field in the second CSI report
  • a predefined rule eg, a predefined value in the first CSI report or a second CSI report
  • the terminal device indicates the measurement type on which the CSI is based, in combination with different implementation manners.
  • the method for the network device to determine the measurement type on which the CSI is based is similar to the method for the terminal device to indicate the measurement type on which the CSI is based, For the sake of brevity, it will not be repeated here.
  • the method for indicating the measurement type of the CSI by the terminal device proposed in the present application is not limited to the scenario provided in the present application, and the CSI is performed when the terminal device is not based on the number of downlink control information received within the preset time period.
  • the type of measurement on which the fed back CSI is based may also be indicated to the network device based on a similar method.
  • the network device can accurately learn the measurement type on which the CSI is fed back by the terminal device, so that a reasonable transmission scheme and a scheduling policy can be determined according to the CSI and the measurement type fed back by the terminal device, which is beneficial to improving data transmission. reliability.
  • FIG. 2 is only for ease of understanding, and schematically illustrates steps performed by the terminal device and each network device, but this does not mean that the terminal device and the network device perform each step shown in the figure, for example,
  • the terminal device may only have step 2201 or step 2202, or step 2201 and step 2202 may also be performed.
  • the terminal device may send CSI to other network devices, and may not send CSI to the first to third network devices shown in the figure. Therefore, FIG. 2 is merely a schematic flow chart and should not be construed as limiting the application.
  • the service network device involved in the present application may refer to a network that provides RRC connection, non-access stratum (NAS) mobility management, and security input services for the terminal device through the wireless air interface protocol. device.
  • NAS non-access stratum
  • storing as referred to in this application may refer to being stored in one or more memories.
  • the one or more memories may be separate arrangements or integrated in an encoder or decoder, processor, or communication device.
  • the one or more memories may also be partially provided separately, and some of them may be integrated in a decoder, a processor, or a communication device.
  • the type of the memory may be any form of storage medium, which is not limited herein.
  • pre-agreed may be implemented by pre-storing corresponding codes, tables, or other means that may be used to indicate relevant information in devices (eg, including terminal devices and network devices), The specific implementation manner is not limited.
  • the communication method of the embodiment of the present application is described in detail above with reference to FIG. 2 .
  • the network device and the terminal device in the embodiments of the present application are described in detail below with reference to FIG. 3 to FIG.
  • FIG. 3 is a schematic block diagram of a terminal device 30 provided by an embodiment of the present application.
  • the terminal device 30 can include a transceiver module 31 and a measurement module 32.
  • the transceiver module 31 is configured to receive downlink control information, where the downlink control information carries measurement information used for channel state information CSI measurement, where the measurement information includes at least indication information of a channel state information reference signal CSI-RS resource configuration.
  • the indication information of the CSI-RS resource configuration is used to indicate a CSI-RS resource;
  • the measurement module 32 is configured to perform CSI measurement based on the measurement information carried in only one downlink control information; otherwise, the measurement module 32 is configured to use the preset time period.
  • the received measurement information carried by the at least two downlink control information is subjected to each CSI measurement.
  • the measurement module 32 is configured to perform, according to the measurement information carried by the N downlink control information received in the preset time period, the CSI measurement, where the nth downlink control information is except the nth
  • the CSI-RS resource indicated by the downlink control information other than the downlink control information is an interference measurement resource of the CSI-RS resource indicated by the nth downlink control information, where N ⁇ n ⁇ 1, N ⁇ 2, and n, N is an integer.
  • the measurement information further includes indication information of a codebook subset restriction CSR, where the indication information of the codebook subset restriction indicates a restricted codebook subset, where the codebook subset includes a codebook Part or all of the codeword;
  • the measuring module 32 is specifically configured to perform the CSI measurement according to the codebook subset indicated by the at least two downlink control information received in the preset time period.
  • the transceiver module 31 is further configured to receive first indication information, where the first indication information indicates whether to perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • each downlink control information of the multiple downlink control information carries an indication of a channel state information CSI report configuration. Information; or
  • One of the plurality of downlink control information carries indication information of multiple CSI report configurations
  • One downlink control information of the multiple downlink control information carries indication information of a CSI report configuration.
  • the transceiver module 31 is further configured to send CSI, where the CSI is measured based on measurement information carried by one or more downlink control information.
  • the transceiver module 31 is specifically configured to:
  • Sending a first CSI report where the first CSI report includes a first field and a second field, where the first field includes: a CSI measured based on measurement information carried by one downlink control information, or multiple CSIs Each CSI of the plurality of CSIs is measured based on measurement information carried by at least two downlink control information, where the second field indicates a measurement type on which the CSI in the first field is based; or
  • each of the plurality of first CSI reports includes a first field and a second field, where the first field includes one based on one or at least two downlink control information
  • the CSI of the carried measurement information is measured, and the second field indicates whether each CSI in the first field is measured based on measurement information carried by the at least two downlink control information.
  • the transceiver module 31 is specifically configured to:
  • the measurement information carried by the control information is measured, and the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on the measurement information carried by the at least two downlink control information; or
  • each of the plurality of first CSI reports includes a first field, where the first field includes a measurement information that is carried based on the at least two downlink control information.
  • CSI or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on measurement information carried by at least two downlink control information.
  • the transceiver module 31 is specifically configured to:
  • the second CSI report includes a third field and a fourth field, where the third field is used to carry multiple CSIs measured based on measurement information carried by one or at least two downlink control information,
  • the fourth field is only used to carry the CSI measured based on the measurement information carried by one downlink control information;
  • each of the plurality of second CSI reports including a third field and a fourth field, the third field being used to carry one based on one or at least two downlink controls
  • the CSI obtained by measuring the measurement information carried by the information, the fourth field is only used to carry a CSI measured based on measurement information carried by one downlink control information.
  • the second CSI report further includes a fifth field, where the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried by the at least two downlink control information.
  • the measurement type includes: CSI measurement based on measurement information carried by at least two downlink control information, or CSI measurement based on measurement information carried by one downlink control information.
  • the measurement information is carried in a CSI request CSI request field.
  • the terminal device 30 may correspond to a network device in the method 200 of measuring channel state information according to an embodiment of the present invention, which may include a terminal device for performing the measurement method 200 of the channel state information in FIG.
  • the module of the method each module in the terminal device 30 and the other operations and/or functions described above are respectively used to implement the corresponding process of the method 200 for measuring the channel state information in FIG. 2, and specifically, the transceiver module 31 is configured to perform step 210 in the method 200. (including step 2101 to step 2103) and step 230, the measuring module 32 is configured to perform step 220 in the method 200 (including one or two of step 2201 or step 2202), and each module performs a specific process of the corresponding step in the method. It has been described in detail in 200, and will not be repeated here for brevity.
  • FIG. 4 is a schematic block diagram of a network device 40 provided by an embodiment of the present application.
  • the network device 40 can include a transceiver module 41 and a determination module 42.
  • the transceiver module 41 is configured to receive channel state information CSI;
  • the determining module 42 is configured to determine whether the CSI received by the transceiver is measured based on measurement information carried in the at least two downlink control information.
  • the transceiver module 41 is specifically configured to receive a first CSI report, where the first CSI report includes a first field and a second field, where the first field includes at least one based on one or at least two downlink control information.
  • the CSI of the carried measurement information is measured, and the second field indicates whether each CSI in the first field is measured based on measurement information carried by the at least two downlink control information.
  • the transceiver module 41 is specifically configured to receive the first CSI report, where the first CSI report includes a first field, where the first field includes at least one measured based on measurement information carried in the at least two downlink control information.
  • CSI or a predefined value; the predefined value implicitly indicates that the terminal device does not perform CSI measurement based on the measurement information carried in the at least two downlink control information.
  • the transceiver module 41 is specifically configured to receive a second CSI report, where the second CSI report includes a third field and a fourth field, where the third field is used to carry at least one downlink control information based on one or at least two The CSI of the measured information is carried, and the fourth field is used to carry at least one CSI measured based on only one CSI-RS resource.
  • the second CSI report further includes a fifth field, where the fifth field indicates whether each CSI carried in the third field is measured based on measurement information carried by the at least two downlink control information.
  • network device 40 may correspond to a network device in measurement method 200 of channel state information in accordance with an embodiment of the present invention, which may include a network device for performing measurement method 200 of channel state information in FIG. 2 ( A module of a method performed by, for example, a first network device, a second network device, or a third network device.
  • each module in the network device 40 and the other operations and/or functions described above are respectively used to implement the corresponding process of the method 200 for measuring channel state information in FIG. 2, and specifically, the transceiver module 41 is configured to perform the steps included in the method 200.
  • the determining module 42 is configured to perform any one of the steps 2401 to 2403 in the method 200, and each module performs the specific steps of the corresponding steps. The process has been described in detail in the method 200 and will not be described again for brevity.
  • FIG. 5 is another schematic block diagram of a terminal device 500 according to an embodiment of the present application.
  • the terminal device 500 includes a processor 501 and a transceiver 502.
  • the terminal device 500 further includes a memory 503.
  • the processor 502, the transceiver 502 and the memory 503 communicate with each other through an internal connection path for transferring control and/or data signals
  • the memory 503 is for storing a computer program
  • the processor 501 is used for the memory 503.
  • the computer program is called and executed to control the transceiver 502 to send and receive signals.
  • the processor 501 When the program instructions stored in the memory 503 are executed by the processor 501, the processor 501 is configured to control the transceiver 502 to receive downlink control information, and the processor 501 is further configured to: when the transceiver 502 receives a downlink control information.
  • the CSI measurement is performed based on the measurement information carried in the one downlink control information; otherwise, the processor 501 is configured to perform each CSI measurement based on the measurement information carried in the at least two downlink control information received in the preset time period. .
  • the above processor 501 and memory 503 can synthesize a processing device, and the processor 501 is configured to execute the program code stored in the memory 503 to implement the above functions.
  • the memory 503 can also be integrated in the processor 501 or independent of the processor 501.
  • the terminal device 500 may further include an antenna 504, configured to send uplink data or uplink control signaling output by the transceiver 502 by using a wireless signal.
  • the terminal device 500 may correspond to a terminal device in the method 200 of measuring channel state information according to an embodiment of the present invention, and the terminal device 500 may include a terminal device for performing the measurement method 200 of the channel state information in FIG.
  • the module of the method of execution are respectively configured to implement a corresponding process of the method 200 for measuring channel state information in FIG. 2, specifically, the memory 503 is configured to store program code, such that the processor 501, when executing the program code, controlling the transceiver 502 to perform step 210 (including steps 2101 to 2103) and step 230 (including steps 2301 to 2303) in method 200 through antenna 504, and perform the steps in method 200.
  • the specific process of each module performing the above corresponding steps has been described in detail in the method 200, and is not described herein again for brevity.
  • the processor 501 can be used to perform the actions implemented by the terminal in the foregoing method embodiments, and the transceiver 502 can be used to perform the actions of the terminal to transmit or transmit to the network device in the foregoing method embodiments.
  • the transceiver 502 can be used to perform the actions of the terminal to transmit or transmit to the network device in the foregoing method embodiments.
  • the above processor 501 and memory 503 can be integrated into one processing device, and the processor 501 is configured to execute the program code stored in the memory 503 to implement the above functions.
  • the memory 503 can also be integrated in the processor 501.
  • the terminal device 500 described above may also include a power source 505 for providing power to various devices or circuits in the terminal.
  • the terminal device 500 may further include one or more of an input unit 506, a display unit 507, an audio circuit 508, a camera 509, a sensor 510, and the like, the audio circuit.
  • an input unit 506 a display unit 507
  • an audio circuit 508 a camera 509
  • a sensor 510 a sensor
  • the terminal device 500 may further include one or more of an input unit 506, a display unit 507, an audio circuit 508, a camera 509, a sensor 510, and the like, the audio circuit.
  • a speaker 5082, a microphone 5084, and the like can also be included.
  • FIG. 6 is another schematic block diagram of a network device 600 according to an embodiment of the present application.
  • the network device 600 includes a processor 610 and a transceiver 620.
  • the network device 600 further includes a memory 630.
  • the processor 610, the transceiver 620 and the memory 630 communicate with each other through an internal connection path for transmitting control and/or data signals
  • the memory 630 is for storing a computer program
  • the processor 610 is configured to receive from the memory 630.
  • the computer program is called and run to control the transceiver 620 to send and receive signals.
  • the processor 610 When the program instructions stored in the memory 630 are executed by the processor 610, the processor 610 is configured to control the transceiver 620 to receive CSI; the processor 610 is further configured to determine whether the received CSI is carried in the at least two downlink control information. The measurement information is measured.
  • the processor 610 and the memory 630 may be combined to form a processing device, and the processor 610 is configured to execute the program code stored in the memory 630 to implement the above functions.
  • the memory 630 may also be integrated in the processor 610 or independent of the processor 610 when implemented.
  • the network device may further include an antenna 640, configured to send downlink data or downlink control signaling output by the transceiver 620 by using a wireless signal.
  • the network device 600 may correspond to a network device (eg, a first network device, a second network device, or a third network device) in the method 200 for measuring channel state information according to an embodiment of the present invention, where the network device 600 may A unit of a method performed by a network device for performing the measurement method 200 of the channel state information in FIG. Moreover, each unit in the network device 30 and the other operations and/or functions described above respectively implement a corresponding flow of the method 200 for measuring channel state information in FIG.
  • a network device eg, a first network device, a second network device, or a third network device
  • the memory 630 is configured to store program code, such that the processor 610, when executing the program code, control the transceiver 620 to perform any one of steps 2101 to 2103 and step 2301 to step 2303 in the method 200 through the antenna 640, and perform steps 2401 to 2403. Any of the steps in .
  • the specific process in which each module performs the above-mentioned corresponding steps has been described in detail in the method 300. For brevity, no further details are provided herein.
  • the application also provides a communication system comprising one or more of the aforementioned network devices, and one or more terminal devices.
  • processors in the embodiment of the present application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration.
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory.
  • the volatile memory can be a random access memory (RAM) that acts as an external cache.
  • RAM random access memory
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic randomness synchronous dynamic randomness.
  • Synchronous DRAM SDRAM
  • DDR SDRAM double data rate synchronous DRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct RAM).
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
  • the above-described embodiments may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer instructions or computer programs.
  • the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more sets of available media.
  • the usable medium can be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium.
  • the semiconductor medium can be a solid state hard drive.
  • 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, and may be in an electrical, mechanical or other form.
  • 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 purpose of the solution of the embodiment.
  • 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used 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 codes. .

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

Abstract

La présente invention concerne un procédé de mesure d'Informations d'état de canal (CSI), un dispositif terminal, et un dispositif de réseau. Le procédé comporte les étapes suivantes: un dispositif terminal reçoit des informations de commande de liaison descendante, les informations de commande de liaison descendante transportant des informations de mesure destinées à la mesure de CSI, les informations de mesure comportant au moins des informations d'indication de configuration de ressource de CSI-RS, pour indiquer une ressource de CSI-RS; un élément d'informations de commande de liaison descendante est reçu au cours d'une période préétablie, et le dispositif terminal effectue une mesure de CSI d'après des informations de mesure transportées dans un seul élément d'informations de commande de liaison descendante ou, en variante, effectue chaque mesure de CSI d'après des informations de mesure transportées dans au moins deux éléments d'informations de commande de liaison descendante reçus au cours de la période préétablie. Par conséquent, le dispositif terminal peut déterminer de manière autonome un type de mesure selon la quantité d'informations de commande de liaison descendante reçues au cours d'une période préétablie, réduisant ainsi la surcharge de signalisation. Un dispositif de réseau peut également déterminer un schéma de transmission et une politique de programmation appropriés selon des CSI mesurées, facilitant ainsi une amélioration de la fiabilité de la transmission de données.
PCT/CN2018/123960 2018-01-03 2018-12-26 Procédé de mesure d'informations d'état de canal, dispositif terminal, et dispositif de réseau WO2019134570A1 (fr)

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