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WO2018028687A1 - Procédé et dispositif de rétroaction d'état de canal - Google Patents

Procédé et dispositif de rétroaction d'état de canal Download PDF

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Publication number
WO2018028687A1
WO2018028687A1 PCT/CN2017/097146 CN2017097146W WO2018028687A1 WO 2018028687 A1 WO2018028687 A1 WO 2018028687A1 CN 2017097146 W CN2017097146 W CN 2017097146W WO 2018028687 A1 WO2018028687 A1 WO 2018028687A1
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WIPO (PCT)
Prior art keywords
csi
group
configuration information
csis
csi configuration
Prior art date
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PCT/CN2017/097146
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English (en)
Chinese (zh)
Inventor
梁津垚
王婷
李元杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201610879250.6A external-priority patent/CN107743042A/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP17838817.9A priority Critical patent/EP3496288A4/fr
Publication of WO2018028687A1 publication Critical patent/WO2018028687A1/fr
Priority to US16/267,847 priority patent/US20190173549A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for channel state feedback.
  • MIMO Multiple Input Multiple Output
  • 4G fourth generation
  • 5G fifth generation
  • a plurality of transmit antennas of a conventional centralized MIMO system are concentrated on a base station (BS) side.
  • BS base station
  • multiple transmit antennas of distributed MIMO systems are distributed in different geographical locations, and each pair of transceiver links is more independent, with large capacity, low power consumption, better coverage, and low body.
  • Advantages such as electromagnetic damage are considered to be one of the alternatives for future wireless communication systems.
  • CoMP Coordinated Multipoint Transmission
  • the embodiment of the invention provides a channel state feedback method and device for reducing the overhead of channel state feedback and improving the effectiveness of channel state feedback.
  • an embodiment of the present invention provides a channel state feedback method, including:
  • the user equipment receives M group channel state information (CSI) configuration information from the network device, where M is an integer greater than or equal to 1; the M group CSI configuration information includes a CSI configuration corresponding to the serving cell of the user equipment. Information, or the CSI configuration information corresponding to the serving cell of the user equipment is not included in the M group CSI configuration information;
  • M channel state information
  • the user equipment feeds back N sets of CSIs in the M group CSI corresponding to the M group CSI configuration information according to the CSI configuration information,
  • the M-group CSI configuration information includes the CSI configuration information of the serving cell of the user equipment
  • the N is an integer greater than or equal to 1 and not greater than M
  • the N-group CSI includes at least CSI of the CSI configuration information of the serving cell
  • the N-group CSI does not include the CSI corresponding to the CSI configuration information of the serving cell, and the N is greater than or equal to 0 and an integer not greater than M.
  • each group of CSI configuration information includes at least one of a cell identifier, a CSI process identifier (ID), or an identifier of a set of non-zero power reference signal resources, where the cell is the user equipment.
  • the associated cell the associated cell includes a serving cell of the user equipment, or a cell that cooperates with the serving cell of the user equipment; the CSI process corresponds to an identifier of a set of non-zero power reference resources.
  • the method further includes: the user equipment feedback indication information, where the indication information is used to indicate N sets of CSI configuration information corresponding to the N sets of CSIs fed back by the user equipment.
  • the method further includes: the user equipment receiving information from the network device indicating a type of each group of CSIs.
  • the information indicating the type of each group of CSI may be predefined, or carried in the CSI configuration information, or carried in other RRC signaling or physical layer signaling.
  • the method further includes: receiving, by the user equipment, information about the number of CSIs included in each group of CSIs from the network device.
  • the information indicating the number of CSIs included in each group of CSIs may be predefined, or carried in the CSI configuration information, or carried in other RRC signaling or physical layer signaling.
  • an embodiment of the present invention provides a channel state feedback method, including:
  • the network device sends M group channel state information (CSI) configuration information to the user equipment, where M is an integer greater than or equal to 1;
  • M group CSI configuration information includes CSI configuration information corresponding to the serving cell of the user equipment.
  • the CSI configuration information corresponding to the serving cell of the user equipment is not included in the M group CSI configuration information;
  • the network device receives N sets of CSIs in the M sets of CSIs corresponding to the M sets of CSI configuration information from the user equipment,
  • the N is an integer greater than or equal to 1 and not greater than M;
  • the N-group CSI does not include the CSI corresponding to the CSI configuration information of the serving cell, and the N is greater than or equal to 0 and an integer not greater than M.
  • it also includes:
  • the network device further sends, to the network device, information indicating a type of each group of CSIs.
  • the information used to indicate the type of each group of CSI may be predefined, or carried in the CSI configuration information, or carried in other RRC signaling or physical layer signaling.
  • the method further includes: sending, by the network device, the CSI included in each group of CSIs to the user equipment Number of information.
  • the number of CSIs that are included in each group of CSIs may be predefined, or carried in the CSI configuration information, or carried in other RRC signaling or physical layer signaling.
  • the type of each group of CSIs includes a rank indication (RI) and/or precoding matrix information (PMI), or
  • the types of CSI for each group include channel quality information (CQI), and, rank indication and/or precoding matrix information.
  • the indication information includes M groups of bits, each group of bits includes at least 1 bit, and each group of bits indicates whether a CSI corresponding to a group of CSI configuration information in the M group of CSI configuration information is used by the user.
  • Device feedback indicates whether a CSI corresponding to a group of CSI configuration information in the M group of CSI configuration information is used by the user.
  • the indication information includes M-1 group bits, each group of bits includes at least 1 bit, and each The group bit indicates whether the CSI corresponding to a group of CSI configuration information in the M-1 group CSI configuration information except the CSI configuration information of the serving cell in the M group CSI configuration information is fed back by the user equipment.
  • the N sets of CSIs are fed back in a predetermined order, where the predetermined order is related to the order of the M sets of bits; or the N sets of CSIs are carried in the M sets of resources corresponding to the M sets of CSIs.
  • the N sets of resources in the M group are fed back, wherein the order of the M sets of CSIs of the M sets of CSIs is related to the order of the M sets of bits, and the resources of the M sets of resources for carrying the N sets of CSI are not used.
  • Carry CSI Carry CSI.
  • the N sets of CSIs are fed back in a predetermined order, where the predetermined order is related to the order of the M-1 group bits; or the N sets of CSIs are carried in the C1 group corresponding to the M-1 group.
  • the N-group resources in the M-1 group resources are fed back, wherein the order of the M-1 group resources of the M-1 group CSI is related to the order of the M-1 group bits, and the M-1 group resources are Resources for carrying the N sets of CSIs are not used to carry CSI.
  • the value of each group of bits indicates the number of CSIs in a group of CSIs corresponding to the corresponding CSI configuration information.
  • the number of CSIs is determined according to the number of CSIs that are required to be fed back by each group of CSI configuration information, and the number of CSIs required to be fed back by each group of CSI configuration information is predefined, or Signaling or physical layer signaling configuration.
  • the indication information includes identifier information of each group of CSI configuration information corresponding to each group of CSIs in the N groups of CSIs.
  • the feedback order of the N sets of CSIs is related to the order of the identifier information of the corresponding N sets of CSI configuration information.
  • the user equipment according to the CSI configuration information, the N sets of CSIs in the M group of CSIs corresponding to the M group of CSI configuration information, including:
  • the user equipment obtains the corresponding M group CSI according to the M group CSI configuration information, according to the determined principle. And N pairs of CSIs in the M group CSI are determined and fed back.
  • the determined principle includes a combination of one or more of the following:
  • Method 1 Determine and feed back N sets of CSIs in the M sets of CSI according to comparison of each group of CSIs in the M group CSI with corresponding threshold values;
  • the type of the CSI is the same or different, and the type of the CSI indicates that each group of CSIs includes an RI, a full band or a subband PMI, or a combination of one or more of the CQIs.
  • the information indicating the type of each group of CSI is carried in the CSI configuration information.
  • the network device is a network device to which the serving cell of the user equipment belongs.
  • the M group CSI configuration information is carried in a CSI process, or is carried in the M CSI processes, and each CSI process carries a set of CSI configuration information, or is carried in the T CSI process, T It is greater than 1 and less than or equal to M, and one of the T CSI processes includes at least 2 sets of CSI configuration information.
  • an embodiment of the present invention further provides an apparatus for wireless communication, where the apparatus may be used for channel state feedback, which includes functional modules required for implementing the method provided by the above first aspect.
  • the apparatus may be used for channel state feedback, which includes functional modules required for implementing the method provided by the above first aspect.
  • the division and description of specific functional modules are not described here.
  • an embodiment of the present invention provides an apparatus for wireless communication, where the apparatus may be used for channel state feedback, which includes functional modules required for implementing the method provided by the above second aspect.
  • the apparatus may be used for channel state feedback, which includes functional modules required for implementing the method provided by the above second aspect.
  • the division and description of specific functional modules are not described here.
  • a fifth aspect of the present invention provides a network device, including: a transceiver, a processor, and a memory; the network device is a specific structure that carries the fourth aspect functional module.
  • the memory is configured to store computer program instructions
  • the processor coupled to the memory, for reading computer program instructions stored by the memory and performing the method as provided in the second aspect above.
  • a terminal (user equipment) provided by the embodiment of the present invention includes: a transceiver, a processor, and a memory; the user equipment is a specific structure that carries the functional module of the third aspect.
  • the memory is configured to store computer program instructions
  • the processor is coupled to the memory for reading computer program instructions stored by the memory and performing the method as provided in the first aspect above.
  • the embodiment of the present invention further provides a program storage medium, where the program stored in the program storage medium is executed, the method provided by any one of the foregoing first aspect or the second aspect may be implemented. .
  • An embodiment of the present invention further provides an apparatus for configuring a resource, where the apparatus configured by the resource may be used to perform the method of the first aspect or the second aspect.
  • the embodiment of the present invention provides a computer readable storage medium, including a computer program, when executed on a computer, causes the method of any one of the first aspect or the second aspect to be implemented.
  • the network device provided by the present application has a function of implementing the behavior of the network device in the above method aspect, and includes means for performing the steps or functions described in the above method aspect.
  • the steps or functions may be implemented by software, or by hardware, or by a combination of hardware and software.
  • the network device described above includes one or more processors and communication units.
  • the one or more processors are configured to support the network device to perform corresponding functions in the above methods. For example, generate configuration information.
  • the transceiver unit is configured to support the network device to communicate with other devices to implement receiving and/or transmitting functions. For example, transmitting configuration information generated by the processor, and/or receiving CSI or the like.
  • the network device may further include one or more memories, and the memory is configured to be coupled to the processor, which saves program instructions and data necessary for the network device.
  • the one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited.
  • the network device may be a base station or a TRP, etc.
  • the communication unit may be a transceiver, or a transceiver circuit.
  • the network device can also be a communication chip.
  • the communication unit may be an input/output circuit or interface of a communication chip.
  • the above network device includes a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver transceiver signal for storing a computer program for calling and running the computer program from the memory, such that the network device performs the second aspect, or any one of the second aspects The method of implementing the network device in the implementation mode.
  • the present application also provides an apparatus having the functionality to implement the behavior of a user device in the aspects of the method described above, including means for performing the steps or functions described in connection with the method aspects above.
  • the steps or functions may be implemented by software, or by hardware, or by a combination of hardware and software.
  • the above apparatus includes one or more processors and communication units.
  • the one or more processors are configured to support the apparatus to perform the respective functions of the methods described above. For example, parsing configuration information.
  • the transceiver unit is configured to support the device to communicate with other devices to implement receiving and/or transmitting functions. For example, receiving configuration information, and/or, transmitting CSI, and the like.
  • the apparatus may further include one or more memories for coupling with the processor, which store program instructions and data necessary for the device.
  • the one or more memories may be integrated with the processor or may be separate from the processor. This application is not limited.
  • the device may be a smart terminal or a wearable device or the like, and the communication unit may be a transceiver or a transceiver circuit.
  • the device can also be a communication chip.
  • the communication unit may be an input/output circuit or interface of a communication chip.
  • the above apparatus includes a transceiver, a processor, and a memory.
  • the processor is configured to control a transceiver to send and receive signals
  • the memory is configured to store a computer program
  • the processor is configured to call and run the memory from the memory
  • a computer program that causes the apparatus to perform the method of the first aspect, or the user equipment in any of the possible implementations of the first aspect.
  • the user equipment may not feed back all or part of the CSI corresponding to all the M sets of CSI configuration information received, so that the overhead of CSI feedback may be reduced.
  • CS/CB refers to the scheduling result of the local area and the neighboring area according to the measured neighboring area interference during the scheduling of the local cell, so as to achieve the purpose of interference avoidance and weakening.
  • Neighbor In coordinated multipoint transmission, multiple cells cooperatively share CSI measurement information or scheduling information, and multiple cells that can be coordinated are referred to as being in the same cooperation set. When a cell performs measurement, other cells in the collaboration set are called neighbor cells.
  • Neighbor interference When a neighboring base station schedules a UE in its range, the beam may cause a large interference to a UE in the area. The interference is caused by the neighboring area and needs to be avoided or weakened in the scheduling coordination of the area and the neighboring area. .
  • Serving cell A cell that has an RRC link with the UE or a cell that transmits data for the UE.
  • Base stations in the same collaboration set can share their own CSI measurement information or scheduling information according to their needs.
  • a typical cooperative behavior is: the serving cell base station acquires measurement information and scheduling information of the neighboring base station.
  • the serving cell adjusts the MCS of the UE or In turn, another UE or neighboring zone is scheduled for beam switching.
  • the CSI configuration information includes:
  • the measurement resources are allocated to the UE by the RRC signaling of the base station.
  • the UE measures the corresponding CSI information on the allocated resources.
  • Measurement resources and corresponding measurement content include:
  • Non-zero power reference signal resource (NZP CSI-RS RE): used to measure channel state information.
  • the channel status information includes: RI, PMI, CQI.
  • Interference measurement resource refers to the quietness of the serving cell, and the neighboring area transmits data, reference signals, etc., and the information measured by the neighboring area is detected on the resource. (optional configuration)
  • Configuration information of the serving cell refers to configuration information used to measure channel state information of the serving cell or a signal on the NZP CSI-RS resource in the configuration information is sent by the serving cell
  • FIG. 1 is a schematic flowchart diagram of a method for providing CSI feedback according to an embodiment of the present application
  • 3a and 3b are schematic structural diagrams of an apparatus for CSI feedback provided by an embodiment of the present application.
  • 4a and 4b are schematic structural diagrams of an apparatus for CSI obtaining according to an embodiment of the present application.
  • Downlink CoMP technologies mainly include Joint Transmission (JT), Coordinated Scheduling and Beamforming (CS/CB), and Dynamic Point Selection/Dynamic Point Blanking (DPS/DPB).
  • JT is divided into coherent JT and non-coherent JT.
  • the serving base station needs to know the downlink channel conditions of each station to the target user (also referred to as channel state.
  • channel state In LTE, the English abbreviation is CSI.
  • the channel state information is abbreviated as CSI. But not limited to this).
  • a reference signal that is, a CSI reference signal (CSI-RS)
  • CSI-RS CSI reference signal
  • the CSI-RS corresponds to 16 different antenna ports, and the port number is 15 to 30.
  • the UE estimates the channel by measuring the specific CSI-RS, and obtains the CSI information and reports it to the serving base station through a physical uplink control channel (PUCCH).
  • the reported CSI information may include a channel quality indicator (CQI), a rank indicator (RI), and one or more combinations of precoding matrix indicator (PMI) information. .
  • CQI channel quality indicator
  • RI rank indicator
  • PMI precoding matrix indicator
  • Some reporting methods also require the user to report a sub-band indicator.
  • RRC Radio Resource Control
  • CS/CB is one of the CoMP technologies. It refers to whether the neighboring cell has interference to the neighboring cell in the scheduling of the cell, and according to the interference situation of the neighboring cell, the cell appropriately adjusts the scheduling result of the cell or adjusts the neighboring cell appropriately.
  • the scheduling result of the cell is used to avoid or reduce the interference of the neighboring cell, thereby more accurately measuring the channel of the cell and more effectively scheduling.
  • the CSI measurement configuration information used by the CS/CB technology is: the serving base station can configure multiple CSI processes (process) for the target user equipment (UE, user equipment) through RRC (radio resource control) signaling.
  • the CSI process the non-zero power (NZP) CSI-RS configuration of the UE is used to measure channel information, and the CSI-IMR (Interference Measurement Resource) is also indicated for measuring interference.
  • the content of the report corresponding to each CSI process may be specified in the configuration.
  • the serving base station may configure a target user equipment (UE, user equipment) through RRC (radio resource control) signaling.
  • the CSI process indicates that multiple sets of UE non-zero power (NZP) CSI-RS configurations are used in each CSI process to measure channel information.
  • the existing RRC signaling configuration is as follows: a cell information of a CSI process, including a process identifier. (csi-ProcessId), NZP identifier (csi-RS-ConfigNZPId) (refer to 3GPP TS 36.331-d00):
  • the specific NZP CSI-RS cells can be described as follows:
  • the content reported by the UE may be determined by configuring a feedback manner (also referred to as CSI feedback configuration information in this application).
  • the content reported by the UE includes a type of CSI fed back by the UE, that is, a combination of one or more of RI, PMI, and CQI included in the CSI.
  • CSI measurement configuration information and CSI feedback configuration information are collectively referred to as CSI configuration information.
  • the CSI configuration information may include CSI measurement configuration information and/or CSI feedback configuration information.
  • CQI and PMI Feedback Types for PUSCH CSI reporting Modes (corresponding to CQI and PMI feedback types of PUSCH (physical uplink shared channel) CSI reporting mode)
  • the base station to which the serving cell of the UE belongs configures multiple CSI processes for the UE, or multiple NZP CSI-RS resources in one CSI process to measure channel information.
  • the UE can measure channel information of other cells to the UE.
  • the UE if the UE does not need to transmit information between other cells and the UE, the UE only needs to know the RI/PMI of other cells to the UE ("/" stands for "and/or”), so the CQI information does not need feedback.
  • no CSI process may not feed back CQI information
  • no NZP CSI-RS resource may not feed back CQI.
  • PUCCH In the feedback configuration of the PUSCH and the PUSCH, there is no configuration that does not feed back CQI information. Therefore, in the CS/CB technology, signaling may be added, such as high-level signaling (such as RRC signaling), so that only RI and PMI are fed back to a CSI process or NZP CSI-RS resources, and CQI is not fed back.
  • the size of the collaboration set depends on the network density, service requirements, etc., so in some cases, the number of cells included in the collaboration set may be large.
  • each cell may have several interference beams, and multiple cells have more interference beams, which results in a large number of UE measurement results.
  • part of the interference is strong interference to the UE
  • part of the interference is weak interference
  • strong interference needs to be fed back to the base station to which the cell belongs, and weak interference does not require feedback.
  • the content reported by the UE is reported according to the configuration of the base station. Generally, all measurement information needs to be fed back.
  • the base station cannot obtain all neighboring interference information at the same time, and the base station obtains the time difference of the information fed back by the UE (especially when multiple CSI processes are configured), which causes the scheduler of the base station to wait for all feedback data to arrive.
  • the scheduling algorithm can be executed.
  • the CQI must be included in the CSI feedback content of the neighboring cell, and the UE does not have a filtering mechanism for whether the CSI of the neighboring cell is reported.
  • the inventor of the present application has proposed a CSI feedback method, which can reduce the waste of signaling resources and improve the effectiveness of collaboration, especially in the CS/CB scenario, which can reduce overhead and implement CSI more efficiently. Measurement and feedback.
  • the embodiments of the present invention are applicable to scenarios of a homogeneous network or a heterogeneous network.
  • the embodiment of the present invention is not limited.
  • it may be various types of transmission points, such as a macro base station and a macro base station, a micro base station and a micro base station, or a macro base station and a micro base station. Cooperative transmission between base stations.
  • the device involved includes a first device and a second device.
  • the second device may configure the first device to perform CSI measurement and feedback for multiple coordinated transmission points, and the first device may perform CSI measurement and feedback for multiple coordinated transmission points according to the configuration information sent by the second device.
  • the first device may be a terminal
  • the second device may be a network device, such as a base station or other type of transmission point device, and is not limited to the above two devices.
  • the second device may also be configured to perform operations on other terminals. Terminal.
  • the base station may be an evolved base station (Evolved Node B, referred to as an eNB or an e-NodeB), a macro base station, a micro base station (also referred to as a "small base station"), a pico base station, and an access in an LTE system or an evolved system thereof.
  • An access point (AP) or a transmission point (TP) may also be a base station in a future network, such as a base station in a 5G network.
  • the terminal may also be referred to as a user equipment (User Equipment, UE for short), or may be called a terminal, a mobile station (Mobile Station, MS for short), a mobile terminal (Mobile Terminal), etc.
  • the terminal may communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, or the like.
  • the terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • the terminal in the embodiment of the present invention may also be a D2D (Device to Device) terminal or an M2M (Machine to Machine) terminal.
  • the embodiments of the present application are applicable to a coordinated multi-point transmission scenario, such as a CS/CB scenario.
  • the user equipment receives M group CSI configuration information from the network device, where M is an integer greater than or equal to 1;
  • the M group CSI configuration information includes CSI configuration information corresponding to the serving cell of the user equipment, where M is an integer greater than or equal to 2;
  • the network device sends the M group CSI configuration information to the user equipment.
  • the CSI configuration information includes a cell identifier, a CSI process ID, an identifier of a set of non-zero-power CSI reference signal resources, or at least one of a set of CSI-IM (interference measurement) resource identifiers.
  • the cell is a cell associated with the user equipment, and the associated cell includes a serving cell of the user equipment, or a cell that cooperates with a serving cell of the user equipment; the CSI process corresponds to a set of non-zero power
  • the identifier of the reference signal resource, or the CSI process corresponds to an identifier of a set of CSI-IM resources.
  • the foregoing network device is a network device to which the serving cell of the user equipment belongs.
  • the M group CSI configuration information may correspond to M cells (which may also be represented as beams, and may also be referred to as beams), and the M cells may include the serving cell of the UE and participate in the serving cell CS/ The other M-1 cells of the CB (referred to as neighbors in this application). It can be understood that the M cells may also include M cells (also referred to as neighbor cells) participating in the serving cell CS/CB of the UE, or the M cells may also include performing various types of CoMP transmission.
  • a cell may include a serving cell of the UE, one or more cells (also referred to as neighboring cells) participating in the serving cell CS/CB of the UE, and participate in a serving cell JT with the UE.
  • the network device to which the cell participating in the CoMP transmission belongs may also be referred to as a transmission point (TP).
  • the transmission point may be a base station or a radio unit of a base station, which is not limited herein.
  • the cell corresponding to the M group CSI configuration information includes only the service of the UE.
  • the cell corresponding to the M group CSI configuration information includes other types except the serving cell of the UE, or the cell (neighborhood) participating in the serving cell CS/CB.
  • the community of CoMP For each type of cell, the CSI feedback requirements may be the same or different (for example, for a JT cell, the CQI must be reported, for a CS/CB cell, the CQI may not be reported), corresponding to the CSI configuration information of the cells.
  • the requirements for CSI feedback can be configured through protocol pre-defined or network devices.
  • interference For a cell participating in a CS/CB, its impact on the channel quality of the serving cell or the cell participating in the JT (typically including the cell with the best channel quality) may be referred to as interference.
  • the user equipment feeds back N sets of CSIs in the M group CSI corresponding to the M group CSI configuration information according to the CSI configuration information, where the N is an integer greater than or equal to 0 and not greater than M;
  • N is greater than or equal to 1, and the N sets of CSIs include at least CSI corresponding to CSI configuration information of the serving cell; or, the N sets of CSIs include at least one set of CSIs with the best channel quality.
  • the network device receives N sets of CSIs in the M group CSI corresponding to the M group CSI configuration information from the user equipment.
  • the user equipment feedback indication information where the indication information is used to indicate N sets of CSI configuration information corresponding to the N sets of CSIs fed back by the user equipment.
  • the network device receives indication information from the user equipment.
  • the indication information may be in the form of a bitmap, or may be identifier information of CSI configuration information corresponding to each group of CSIs.
  • the indication information is in the form of a bitmap
  • the indication information may include M groups of bits, each group of bits including at least 1 bit, and each group of bits indicates whether a CSI corresponding to a group of CSI configuration information in the M group of CSI configuration information is used by the user Device feedback. For example, if the value of M is 5, the indication information includes 5 groups of bits, and each group of bits corresponds to a CSI corresponding to a group of CSI configuration information. When the CSI corresponding to a certain group of CSI configuration information needs feedback, the CSI corresponds to The bit can be set to a preset value. For example, when the CSI corresponding to a certain group of CSI configuration information does not require feedback, the bit corresponding to the CSI can be set to another preset value, such as 0.
  • the feedback order of the N sets of CSIs may be related to the order of the M sets of CSI configuration information corresponding to the corresponding M sets of bits, for example, consistent.
  • the network device can learn, according to the feedback sequence, which N sets of CSI configuration information corresponding to the fed N sets of CSIs are.
  • the M group bits may be continuously transmitted, or each group of the M groups of bits may be transmitted together with a group of CSIs indicated by the group.
  • the UE may allocate resources only to the N sets of CSIs, where the N sets of CSIs are sequentially carried in the resources allocated by the UE; or the UE may give the M sets of CSIs corresponding to the M sets of CSI configuration information.
  • the resources are reserved, and the N sets of CSIs actually fed back are sequentially carried in the corresponding N groups of resources in the M group CSI reserved resources.
  • the indication information may include M-1 group bits.
  • the CSI corresponding to the CSI configuration information of the serving cell of the UE may be required to be fed back by default, and the feedback of the group of CSI may be determined by the network device to be corresponding to the CSI configuration information of the serving cell by other means, the group of CSI may not need to be in the CSI configuration information.
  • An indication is made in the feedback of the UE.
  • the manner in which the specific M-1 group bits are indicated may be referred to the manner in which the above M group bits are indicated.
  • the M-1 group bits may be continuously transmitted, or each group of the M-1 group bits may be transmitted together with a group of CSIs indicated by the group.
  • the identifier information of the CSI configuration information may be the cell identifier information, the CSI process identifier information, or the identifier information of the NZP CSI-RS resource, or Identification information of CSI-IM resources.
  • the identifier information of the foregoing CSI configuration information may also be an index of each group of CSI configuration information, that is, a number of each group of CSI configuration information in the configured M group CSI configuration information.
  • the number of bits occupied by the index may be log 2 M, and the index of each group of CSI configuration information may be M positive integers of 0 to M-1.
  • the order can be foreseen by both the network device and the UE. It can be understood that the number of bits occupied by the index can be notified to the UE through physical layer signaling or higher layer signaling. Or the number of index bits is predefined by the protocol.
  • the identifier information of the CSI configuration information corresponding to each group of CSIs may be transmitted together with the indicated CSI, and the CSI may include an RI, a PMI, or a CQI. This can make CSI feedback more flexible.
  • the identifier information may be coded and modulated together with the RI, PMI or CQI in the CSI indicated.
  • the identification information may be separately coded and modulated independently of the RI, PMI or CQI in the CSI indicated.
  • how the identification information of the CSI configuration information corresponding to each group of CSIs is sent together with the CSI may be predefined by the system.
  • the identification information of the CSI configuration information corresponding to each group of CSIs may be transmitted together with the RI, and the transmission order of the two may be predefined by the system, for example, the identification information is before the RI, or the identification information is after the RI; or
  • the identification information of the CSI configuration information corresponding to each group of CSIs may be sent together with the sub-band or the full-band PMI and/or CQI.
  • the transmission order of the two may be predefined by the system, such as the identification information placed before the PMI and / or CQI or The identification information is placed after the PMI and/or CQI, or the identification information is placed at the specified coding location; or
  • the identification information of the CSI configuration information corresponding to each group of CSIs may be sent together with the CRI (CSI-RS resource ID).
  • the transmission order of the two may be predefined by the system, such as the identification information is placed before the CRI or the identification information is placed after the CRI, or the identification information is placed at the specified coding location.
  • the type reported for the CSI measurement is class B (type B, which refers to beamformed CSI-RS, beam-formed CSI-RS) and K CSI-RS resources (K>1) are configured for CSI measurement.
  • the UE needs to include the CRI in the feedback CSI.
  • the type of CSI measurement report of the UE may be notified by the eMIMO-Type cell in the high layer signaling.
  • the indication information is sent in a PUSCH, or the indication information is sent in a PUCCH.
  • the reporting type of the PUCCH such as the type 11-16, may be used to indicate the format in which the indication information is sent together with the CSI.
  • Type 11 indicates that CRI and indication information are supported for transmission together
  • Type 12 indicates that the support RI and the indication information are transmitted together
  • Type 13 indicates support for CRI, and RI and indication information are transmitted together;
  • Type 14 indicates support for wideband CQI and indication information to be transmitted together
  • Type 15 indicates support for wideband CQI, and PMI and indication information are transmitted together;
  • Type 16 indicates that the sub-band CQI is supported, and the second PMI is transmitted together with the indication information.
  • the manner in which the UE determines the N sets of CSIs that are required to be fed back may include a combination of one or more of the following manners:
  • Method 1 Obtain a corresponding M group CSI according to the M group CSI configuration information, and determine and feed back N sets of CSI in the M group CSI according to comparison between each group CSI in the M group CSI and a corresponding threshold.
  • the CQI included in the CSI can be compared with the corresponding first threshold.
  • the corresponding CSI feedback is performed.
  • channel quality preferably means that the CQI value is the largest.
  • the feedback principle may be:
  • CSI of the CSI configuration information of the serving cell or M group CSI corresponding to the M group CSI configuration information A set of CSI indicating the best channel quality is used as the reference CSI, and the CSI configuration information corresponding to the reference CSI is referred to as reference CSI configuration information.
  • the CQIs in the CSIs corresponding to the CSI configuration information of the other group are compared with the CQIs in the reference CSI, and when the difference between the two is less than or equal to the second threshold, the CSI corresponding to the CSI configuration information is performed.
  • Feedback when the difference between the two is less than or equal to the second threshold, it may be stated that the channel quality corresponding to the non-reference CSI configuration information is equivalent to the channel quality corresponding to the reference CSI configuration information, if the non-reference CSI configuration information corresponds to The cell of the CS/CB has a large interference to the channel corresponding to the reference CSI configuration information.
  • the cell can be preferentially scheduled to participate in the JT, if not the reference.
  • the CSI configuration information corresponds to the cell of the DPS, and the cell may be preferentially scheduled to transmit data by the UE.
  • the UE When the UE superimposes the other group CSI configuration information on the reference CSI configuration information one by one (that is, the two sets of CSI configuration information are used for the UE to measure the channel at the same time), the channel information is measured one by one to obtain the CQI in the corresponding CSI, and The plurality of CQIs obtained by the measurements are compared with the CQIs in the reference CSI. When the difference between the two is greater than or equal to the third threshold, the CSI corresponding to the corresponding CSI configuration information is fed back.
  • the channel corresponding to the non-reference CSI configuration information has a greater impact on the channel corresponding to the reference CSI configuration information, and if the non-reference CSI configuration information corresponds to the CS/ In the cell of the CB, the cell has a large interference to the channel corresponding to the reference CSI configuration information. If the non-reference CSI configuration information corresponds to the JT cell, the cell may be preferentially scheduled to participate in the JT if the non-reference CSI configuration The information corresponds to the cell of the DPS, and the cell can be preferentially scheduled to transmit data by the UE.
  • first threshold value, second threshold value and third threshold value in the above manner 1 and/or mode 2 may be predetermined by the protocol (ie It can be configured through network devices, such as physical layer signaling or higher layer signaling. This configuration may be performed by using the CSI configuration information in S101, or may be performed in other manners, and is not limited herein.
  • the power value threshold corresponding to the interference beam may be measured at the same time, and the power value threshold is reported.
  • the power threshold is when the power value of the beam is greater than the power threshold, and the beam needs to be considered in various coordinated scenarios, such as CS/CB, JT, or DSP.
  • the method for determining the threshold of the power value may have the following three schemes:
  • the corresponding M group CSI is obtained according to the M group CSI configuration information, and the M group is determined and fed back according to the comparison between each group CSI in the M group CSI and the corresponding first threshold value. N sets of CSI in CSI.
  • the threshold if the CQI value measured for the group of CSI configuration information is CQI1, there is a power value threshold PA, so that when the power corresponding to the CSI configuration information is P1>PA, the CQI1 under the power P1 If the power corresponding to the CSI configuration information is P2 ⁇ PA (which may be less than or equal to), the CQI1 under the power P2 is smaller than the first threshold.
  • the interference of the beam of the neighboring cell to the UE is larger, smaller than (or equal to) the interference of the beam of the neighboring cell to the UE when the power value threshold PA is acceptable.
  • the cell may be preferentially scheduled to participate in the JT, and the power configuration is If the CSI configuration information is greater than the power of the DPS (the beam of the neighboring cell), if the power of the beam of the neighboring cell is greater than the power threshold PA, the cell may be preferentially scheduled as the UE.
  • the data is transmitted and its power is configured to be greater than the power value threshold PA.
  • the expression of the power value threshold PA may be a specific value or a ratio.
  • the representation of the power P1 or P2 corresponding to the CSI configuration information is the same as the representation of the power value threshold.
  • the above power value threshold PA can satisfy:
  • H is a channel matrix measured by the UE based on the set of CSI configuration information, where W is a precoding matrix selected by the UE based on the set of CSI configuration information, where I is an interference value, N is a noise value, and P1 and P2 are the CSI configuration information of the group.
  • 2 is the square of the modulo.
  • 2 is a value calculated after considering the data of the network device configuration and the power of the pilot.
  • Solution 2 A feedback principle in the foregoing mode 2, that is, the CSI of the CSI configuration information of the serving cell or the CSI of the M group CSI corresponding to the M group CSI configuration information indicating the best channel quality is used as a reference.
  • the CSI configuration information corresponding to the reference CSI is referred to as reference CSI configuration information
  • the CQI in the CSI corresponding to the other group of CSI configuration information (also referred to as non-reference CSI configuration information) is compared with the CQI in the reference CSI one by one, when two When the difference between the two is less than or equal to the second threshold, the CSI corresponding to the CSI configuration information is fed back;
  • the measured CQI value is CQI1
  • a power value threshold PB such that when the power P1>PB corresponding to the non-reference CSI configuration information, the CQI1 under the power P1 and the reference
  • the difference between the two is less than or equal to the second threshold; when the power corresponding to the non-reference CSI configuration information is P2 ⁇ PB (which may be less than or equal to),
  • the power corresponding to the non-reference CSI configuration information is P2 ⁇ PB (which may be less than or equal to)
  • the difference between the two is greater than the second threshold.
  • the interference of the beam of the neighboring cell to the UE is larger.
  • the power value threshold PB is less than (or equal to) the interference of the beam of the neighboring cell to the UE is acceptable.
  • the cell may be prioritized. It is scheduled to transmit data to the UE, and its power is configured to be greater than the power value threshold PB.
  • the expression of the power value threshold PB may be a specific value or a ratio.
  • the representation of the power P1 or P2 corresponding to the non-reference CSI configuration information is the same as the representation of the power value threshold.
  • the above power value threshold PB can satisfy:
  • the reference CQI is a value of a CQI included in the CSI corresponding to the reference CSI configuration information
  • H is a channel matrix measured by the UE based on the set of CSI configuration information
  • W is a precoding matrix selected by the UE based on the set of CSI configuration information
  • W' is a precoding matrix selected by the UE for the reference CSI configuration information
  • I' is the interference value measured for the reference CSI configuration information
  • N' is the noise value measured for the reference CSI configuration information.
  • 2 is a value calculated after considering the data of the network device configuration and the power of the pilot.
  • 2 in the above formula may be replaced by P x
  • Scenario 3 Another feedback principle in the foregoing mode 2, that is, the UE superimposes other group CSI configuration information on the reference CSI configuration information one by one (that is, two sets of CSI configuration information are simultaneously used for UE to measure channel).
  • the channel information is measured one by one to obtain the CQI in the corresponding CSI, and the plurality of CQIs obtained by the measurements are compared with the CQI in the reference CSI, when the difference between the two is greater than or equal to the third threshold, The CSI corresponding to the corresponding CSI configuration information is fed back.
  • the CQI value in the corresponding CSI is obtained for the channel information measurement to be CQI1.
  • a power value threshold PC such that when the power P1>PC corresponding to the non-reference CSI configuration information is compared, the difference between the CQI1 under the power P1 and the CQI in the reference CSI is greater than the third gate.
  • the power P2 ⁇ PC (which may be less than or equal to) corresponding to the non-reference CSI configuration information
  • the difference between the CQI1 under the power P2 and the CQI in the reference CSI is less than or Equal to the third threshold.
  • the non-reference CSI configuration information of the group corresponds to the cell of the CS/CB (the beam of the neighboring cell), indicating that the power of the beam of the neighboring cell is greater than the power threshold PC, the interference of the beam of the neighboring cell to the UE is larger.
  • the power value threshold PC the interference of the beam of the neighboring cell to the UE is acceptable.
  • the cell may be preferentially scheduled to participate in the JT, and its power Configured to be greater than the power threshold PC.
  • the group of non-reference CSI configuration information corresponds to the cell of the DPS (the beam of the neighboring cell)
  • the power of the beam of the neighboring cell is greater than the power threshold PC
  • the cell can take precedence. It is scheduled to transmit data to the UE, and its power is configured to be greater than the power value threshold PC.
  • the power value threshold PC can be expressed in a specific value or a ratio.
  • the representation of the power P1 or P2 corresponding to the non-reference CSI configuration information is the same as the representation of the power value threshold.
  • the above power value threshold PC satisfies:
  • the reference CQI is the value of the CQI included in the CSI corresponding to the reference CSI configuration information
  • P1 and P2 are the power values corresponding to the CSI configuration information
  • the threshold 3 is the third threshold
  • 2 is the modulo
  • H 0 is a matrix of channels measured by the UE based on the reference CSI configuration information
  • W 0 is a precoding matrix selected by the UE based on the reference CSI configuration information
  • H 1 is the UE that is reported based on the to-be-measured a channel for measuring CSI configuration information
  • W 1 is a measurement of a precoding matrix selected by the UE based on the set of CSI configuration information to be measured
  • I 0 is interference of the group of CSI configuration information to be measured and reported.
  • N is noise.
  • 2 are values calculated after considering the data of the network device configuration and the power of the pilot, as another optional example,
  • the UE when it reports the above power threshold, it can report with the CRI, RI, PMI, or CQI.
  • the manner of reporting together may refer to the description in the manner in which the foregoing indication information is reported together with CRI, RI, PMI or CQI, that is, the power value threshold may be sent together with one or more of CRI, RI, PMI or CQI, specific
  • the code modulation may be coded together, or the code modulation may be performed separately.
  • the power value may be thresholded in the order, or the power value threshold may be followed.
  • the specific reporting method can be pre-defined by the system or configured by the reporting type of the PUCCH.
  • the reporting of the power value threshold may be performed by using a relative value or an absolute value.
  • the relative value of the power threshold (such as 1, 1/2, 1/3, 1/4) is divided into two levels, and one bit is required to be reported, and four levels are required. 2 bits are reported. Examples are as follows:
  • the absolute value of the power value threshold (such as an integer from -8 to 15) is quantized, and the quantization interval can be predefined by the system to be 1 or 2 or greater.
  • the quantization interval is different, and the power value threshold accounts for a different number of bits. For example, if the absolute value is an integer from -8 to 15, the power value threshold needs to occupy 5 bits when the quantization interval is 1, and the power value threshold needs to occupy 4 bits when the quantization interval is 2. If the quantization interval is 4, the power value threshold needs to be occupied. 3 bits and so on.
  • whether the UE reports the power information may be predefined by the system, or configured by the transmission point, for example, by using CSI configuration information, or configured by other signaling.
  • the coordinated transmission point obtains the information (such as the CSI) of the cell (the neighboring area beam) to be considered in the coordinated scenario and the corresponding power value threshold, and can perform the cooperative scheduling transmission flexibly.
  • the power smaller than the reported power value threshold may be used (or the cooperative TP may determine the transmission power value according to the fixed algorithm according to the reported power value threshold, for example,
  • System performance can be improved compared to directly circumventing the beam.
  • a group of CSIs fed back by the UE may include multiple CSIs.
  • the UE may perform CSI measurement for all codewords to obtain one or more CSIs.
  • Each CSI can be for one codeword and different CSIs for different codewords.
  • the number of CSIs included in a group of CSIs that are fed back by the UE may be determined by a protocol, or may be configured by using a network device, and determining which CSIs are used for feedback from all the CSIs obtained by the measurement, and the specific principle may be a protocol reservation. It can also be configured through a network device.
  • the specific principle can be: only The feedback indicates that the channel quality is good (also called strong interference), and the ranking is the CSI of the first few bits (for example, the value of the CQI is relatively large), and the specific number is determined by the number of CSIs to be fed back.
  • the number of CSIs corresponding to the feedback required for different sets of CSI configuration information may be the same or different.
  • the configuration parameters of the number of CSIs required for configuring different sets of CSI configuration information may be common.
  • the power threshold may be correspondingly fed back to multiple power value thresholds, or may only be fed back to a power threshold corresponding to a portion of the CSI, such as only feeding back a power threshold corresponding to the first CSI. . This can be predefined by the system as needed.
  • each group of bits in the above bitmap may also be used to indicate that each group of CSIs that are specifically fed back is included.
  • the number of CSIs, and the number of bits per group of bits can be predetermined to be the same or different in the protocol. For example, when the protocol is scheduled or configured to report (feedback) a strongest interference (or the best channel quality) for each group of CSI configuration information, each bit in the bitmap represents the interference (channel) reporting of one cell, and 1 indicates the reporting. The information of the strongest interference (best channel) of the cell, 0 indicates that the cell does not report interference (channel) information.
  • each cell reports a maximum of two strongest interferences
  • each of the two bits in the bitmap represents one cell
  • 00 indicates that the UE does not report interference (or channel) information of the cell
  • 01 indicates that the UE reports the cell.
  • 10 indicates information reporting two interferences (channels) of the cell. It can be understood that the number of CSIs included in each group of CSIs that are specifically fed back can also be indicated by other information. This is not limited here.
  • the manner in which the UE determines the N sets of CSIs that need to be fed back may also be applicable, but when a group of CSIs is fed back, the corresponding CSIs are fed back according to the protocol reservation or the network configuration, in comparison.
  • a plurality of CQIs in a set of CSIs to be determined whether to be fed back and a plurality of CQIs in the reference CSI are considered.
  • one manner is: respectively, multiple CQIs (such as 3 CQIs, corresponding to 3 codewords) in a group of CSIs to be determined whether to feed back, and multiple CQIs in the reference CSI (such as 3 CQIs, Corresponding to the three codewords, respectively, to obtain the difference of the corresponding number (for example, three CQIs are compared with three CQIs in the reference CSI to obtain nine differences), and the function of the obtained difference is obtained (the function) It can be compared with the corresponding threshold value to determine whether the set of CSI is fed back, whether it is the largest, the smallest, or the average, or other mathematical operations.
  • another method is: comparing a maximum value of multiple CQIs in a group of CSIs to be determined whether to be fed back with a maximum value or a minimum value of multiple CQIs in a reference CSI, and obtaining a difference value and corresponding
  • the threshold values are compared, or the minimum values of the plurality of CQIs in a set of CSIs to be determined whether to be fed back are compared with the maximum or minimum values of the plurality of CQIs in the reference CSI, and the obtained difference values are corresponding to The threshold values are compared to determine whether the set of CSIs is fed back.
  • the specific threshold value may be different according to the function of the foregoing difference value or the object to be compared.
  • the determination of the threshold value may be predefined by a protocol or configured by a network device, and is not limited herein. .
  • each CSI in each group of CSIs may be the same or different.
  • the content included in each group of CSIs is RI, a combination of one or more of the full-band or sub-band PMI and CQI, and may also be referred to as a CSI type, such as only including RI and full-band PMI, or Only RI and sub-band PMI are included, or include RI, full-band PMI, and CQI, or include RI, sub-band PMI, and CQI, which are not fully listed here.
  • the type of the CSI may be pre-defined by a protocol or configured by a network device, for example, the UE receives information indicating a type of each group of CSIs from the network device, and the information indicating the type of each group of CSIs may be carried in a high-level letter.
  • the information indicating the type of each group of CSI may be carried in the foregoing CSI configuration information for configuration.
  • the indication information may be added to the CSI process cell information to indicate that the CSI configuration information indicated by the CSI process only needs to feed back the RI and the PMI, and does not need to feed back the CQI.
  • the pmi-ReportProc-r14 cell in the following cell may be added to the CSI process cell information to indicate that the CSI configuration information indicated by the CSI process only needs to feed back the RI and the PMI, and does not need to feed back the CQI.
  • the indication information may be added to the NZP CSI-RS resource information in the CSI process cell information, where the CSI configuration information indicated by the NZP CSI-RS resource information is only required to feed back the RI and the PMI. No need to feedback CQI.
  • csi-RS-ConfigNZPIDList-r11 in the following cell indicates multiple sets of NZP CSI-RS resource information
  • pmi-ReportNZPList-r14 indicates which of the CSI configuration information indicated by multiple sets of NZP CSI-RS resource information only needs feedback RI.
  • PMI no feedback CQI.
  • the UE may not feed back the corresponding CSI for all configured CSI configuration information, so that the number of resources required for CSI feedback in cooperation may be reduced on the one hand, and the network device may be beneficial on the other hand. More efficient execution scheduling. Further, the CSI fed back by the UE is filtered on the UE side, which can improve the effectiveness of the fed back CSI for scheduling the network device.
  • An embodiment of the present application further provides another CSI feedback method, which is different from the previous method, in which the MSI CSI configuration information in S101 does not include CSI configuration information corresponding to the serving cell of the user equipment, M is an integer greater than or equal to 1; correspondingly, in S102, the N sets of CSIs do not include CSI corresponding to CSI configuration information of the serving cell and the N is an integer greater than or equal to 0 and not greater than M. Then, when the indication information in S103 is in the form of a bitmap, the indication information includes M groups of bits, each group of bits includes at least 1 bit, and each group of bits indicates a group of CSI configuration information in the M group of CSI configuration information. Whether the corresponding CSI is fed back by the user equipment.
  • the manner in which the UE determines the N sets of CSIs to be fed back does not include the CSI feedback corresponding to the CSI configuration information of the serving cell of the UE, and does not include the CSI of the serving cell corresponding to the UE.
  • the CSI of the configuration information is used as a scheme of the reference CSI.
  • Other schemes such as reporting a group of CSIs indicating the best channel quality in the M-group CSI corresponding to the M-group CSI configuration information, and/or as the reference CSI and other M-
  • the scheme for comparing the M-1 group CSI corresponding to one group of CSI configuration information is still applicable.
  • the descriptions of other aspects in the present CSI feedback method can be referred to the description in the foregoing CSI feedback method.
  • the indication information for indicating the N sets of CSI configuration information corresponding to the N sets of CSIs and the reporting of the N sets of CSI may be specifically performed in a combination of one or more of the following manners:
  • a PUCCH format may be defined for transmitting the indication information. For example, defining PUCCH format 6: feedback corresponding to indication information under multi-cell (or TP) measurement
  • the UE may first transmit the indication information in the PUCCH format 6, and then transmit the CSI indicated by the indication information in the PUCCH format 2, 2a, or 2b.
  • the CSI may be transmitted in the PUCCH format 2, 2a, or 2b, and the indication information corresponding to the CSI may be transmitted in the PUCCH format 6.
  • the processing of the CSI by the network device depends on the indication information indicating the CSI.
  • the feedback of the indication information may be periodically indicated by the CSI configuration information (which may be consistent with the period of the CSI feedback), or may be indicated by other information that the feedback of the indication information is periodic.
  • the configuration of the indication information period may be performed by adding signaling (such as a bitmap) to the indication signaling of the existing CQI feedback period, such as a bitmap-indicator-ConfigIndex, for indicating a feedback period of the indication information.
  • signaling such as a bitmap
  • the existing CQI feedback period such as a bitmap-indicator-ConfigIndex
  • the time domain resource that feeds back the indication information may be obtained according to N pd and N OFFSET, Inc. , where N pd is a feedback period of the indication information, and N OFFSET, Inc. is a start position and a subframe of the time domain resource.
  • the offset of the starting position For example: the radio frame number is n f and the slot number is n s when the formula is satisfied
  • a resource in the time slot with N OFFSET, Indicator as a starting position is used for transmission of the indication information.
  • the specific N pd and N OFFSET, the indicator can be pre-defined by the protocol, can also be configured through the network device, and can also be configured in an indirect manner. If the network device is configured with N pd and N OFFSET, the indicators related to the indicator, such as I Indicator , the user The device can obtain the values of the corresponding N pd and N OFFSET, Indicator according to the preset relationship among the three (an example is as follows).
  • the I indicator can be configured by the network device according to the actual situation. For example, when the UE moves at a high speed, the value of the corresponding I Indicator can be small, and the moving speed of the UE is small, and the value of the corresponding I Indicator can be large.
  • the feedback period of the indication information may also be obtained according to a CQI feedback period without additional signaling.
  • the feedback period of the indication information may be the same as the CQI feedback period, such as a full-band CQI period or The sub-band has a CQI cycle.
  • the specific CQI feedback period can be obtained by the existing method, or can be obtained by other means, and will not be described here.
  • the PUCCH of the PUCCH format 6 can be sent on both sides of the working bandwidth, for example, occupying one RB position on each side of the working bandwidth.
  • a resource may be allocated on the resource occupied by the PUSCH for the transmission of the indication information. For example, one or more subcarriers or one or more symbols may be allocated, or a certain pattern is corresponding. Time-frequency resources.
  • the indication information may be reported in the same time unit as the CSI information, such as a subframe, or may be reported in a different subframe.
  • the UE Before reporting the CSI, the UE may report the corresponding indication information, or report the corresponding indication information after reporting the CSI.
  • the feedback mode of the N sets of CSIs may be:
  • the UE may report the N sets of CSI information corresponding to the N sets of CSI configuration information in the same subframe.
  • the existing multi-CSI feedback format such as format4-MultiCSI-resourceConfiguration or format5-MultiCSI-resourceConfiguration, can be used for reporting.
  • the reporting period is the reporting period of the CSI that is predefined by the protocol or configured by the network device. or,
  • the N sets of CSIs are transmitted in different subframes.
  • the report is performed in the order of increasing the identifier (ID) of the corresponding N sets of CSI configuration information (such as the NZP CSI-RS ID or the CSI-IM ID).
  • the indication information is reported before the N sets of CSIs are reported. If the indication information indicates that the CSI corresponding to the CSI configuration information is not reported, the ID corresponding to the next set of CSI configuration information indicated by the indication information indicated in the indication information may be reported in the corresponding subframe for reporting the CSI.
  • the CSI, or the UE does not transmit information on the corresponding subframe, and the network device schedules other UEs to perform information transmission (because the network device knows that the UE is not reported by the indication information, other UEs may be scheduled for transmission. ).
  • the UE reports the N sets of CSIs corresponding to the N sets of CSI configuration information according to the CSI period.
  • the N sets of CSIs are reported in the same subframe.
  • the existing format4-MultiCSI-resourceConfiguration or format5-MultiCSI-resourceConfiguration can be used for reporting. or,
  • the UE reports the N sets of CSIs corresponding to the N sets of CSI configuration information according to the foregoing period for indicating the N sets of CSI configuration information corresponding to the N sets of CSIs, and can report the N sets of CSI information in the same Reported in a sub-frame.
  • the existing format4-MultiCSI-resourceConfiguration or format5-MultiCSI-resourceConfiguration can be used for reporting.
  • the resource configuration methods of the format4 and the format5 may refer to the manner in the existing protocol, as follows:
  • the UE may transmit the N sets of CSIs in different subframes.
  • the CSI process ID is reported in the order of increasing.
  • the corresponding indication information may be reported before the CSI is reported. If the indication information indicates that the CSI corresponding to the CSI configuration information is not reported, the CSI corresponding to the ID of the next set of CSI configuration information with the feedback indicated in the indication information may be reported in the corresponding subframe for reporting the CSI. Or, the UE does not transmit information on the corresponding subframe, and the network device schedules other UEs to perform information transmission (because the network device knows that the UE is not reported by the indication information, other UEs may be scheduled for transmission).
  • FIG. 2 is a schematic diagram of a scenario applied to an embodiment of the present application, including a first transmission point TP1 and a second transmission point TP2, a cell 1 managed by TP1, and a cell 2 managed by TP2, and UE1 and UE2.
  • the embodiment of the present application further provides a device for CSI feedback, which may be the user equipment described in the foregoing method, or other device capable of implementing the action of the user equipment in the foregoing method.
  • FIG. 3a and 3b are schematic structural diagrams of an apparatus for channel state feedback (or channel state information feedback) according to an embodiment of the present invention.
  • the apparatus may include: a receiving unit 301, a transmitting unit 302, and a processing unit 303, where:
  • the receiving unit 301 is configured to perform a receiving action performed by the user equipment described in the foregoing method
  • the sending unit 302 is configured to perform a sending action performed by the user equipment described in the foregoing method
  • the processing unit 303 can be configured to perform the corresponding processing described in the foregoing method on the signal received by the receiving unit 301, and/or perform the corresponding processing described in the foregoing method on the signal to be sent by the sending unit 302, and send the corresponding method by using the foregoing method.
  • Unit 302 transmits the signal.
  • the receiving unit 301 and the sending unit 302 can be implemented by using the transceiver 3001 in FIG. 3b, and the processing unit 303 can be implemented by using the processor 3002, or by using the processor 3002 and the memory 3003.
  • the receiving unit 301 can be configured to receive M group CSI configuration information from the network device, where M is an integer greater than or equal to 1;
  • the processing unit 303 is configured to: according to the CSI configuration information, feed back, by the sending unit 302, corresponding to the N sets of CSIs in the M group CSI of the M group CSI configuration information, where N is an integer greater than or equal to 0 and not greater than M.
  • the apparatus may include: a transceiver 3001 and a processor 3002.
  • the processor 3002 is configured to control the operation of the apparatus, including transmitting (including receiving and/or transmitting) data through the transceiver 3001.
  • a memory 3003 may be included.
  • the memory 3003 may include a read only memory and a random access memory for providing instructions and data to the processor 3002.
  • the memory 3003 may be integrated in the processor 3002 or may be independent of the processor 3002.
  • a portion of the memory 3003 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • bus system 3009 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • bus system 3009 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 3009 in the figure.
  • the flow disclosed in the embodiment of the present application may be applied to the processor 3002 or implemented by the processor 3002.
  • each step of the process implemented by the device may be completed by an integrated logic circuit of hardware in the processor 3002 or an instruction in the form of software.
  • the processor 3002 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 3003, and the processor 3002 reads the information in the memory 3003, and completes the steps of the instruction flow of the embodiment of the present invention in combination with the hardware thereof.
  • the device when it is a user equipment, it may further include an input device, such as a keyboard, an output device, such as a display screen, and the like, and details are not described herein.
  • an input device such as a keyboard
  • an output device such as a display screen, and the like, and details are not described herein.
  • the embodiment of the present invention further provides an apparatus for channel state feedback (or channel state information acquisition), which may be the network device described in the above method, and more specifically may be A transmission point, such as a base station, may also be a device capable of implementing the corresponding functions of the network device described in the above method.
  • the apparatus may include: a transmitting unit 401, a receiving unit 402, and a processing unit 403, where:
  • the sending unit 401 is configured to perform a sending action performed by the network device described in the foregoing method
  • the receiving unit 402 is configured to perform a receiving action performed by the network device described in the foregoing method
  • the processing unit 403 can be configured to perform the corresponding processing described in the foregoing method on the signal received by the receiving unit 402, and/or perform the corresponding processing described in the foregoing method on the signal to be sent by the sending unit 401 and pass the The transmitting unit 401 transmits the signal.
  • the receiving unit 402 and the sending unit 401 can be implemented by using the transceiver 4001 in FIG. 4b, and the processing unit 403 can be implemented by using the processor 4002, or by using the processor 4002 and the memory 4003.
  • the sending unit 401 is configured to send M group CSI configuration information to the user equipment, where M is an integer greater than or equal to 1;
  • the receiving unit 402 is configured to receive N sets of CSIs in the M group CSI corresponding to the M group CSI configuration information from the user equipment, where N is an integer greater than or equal to 0 and not greater than M.
  • the network device can include a transceiver 4001, a processor 4002, and a memory 4003.
  • the processor 4002 is configured to control the operation of the apparatus, including transmitting (including receiving and/or transmitting) data through the transceiver 4001;
  • the memory 4003 may include a read only memory and a random access memory for providing instructions to the processor 4002. And data.
  • a portion of the memory 4003 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the apparatus are coupled together by a bus system, wherein the bus system 4009 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 4009 in the figure.
  • the flow disclosed in the embodiment of the present application may be applied to the processor 4002 or implemented by the processor 4002.
  • the steps of the process implemented by the device may be completed by the integrated logic circuit of the hardware in the processor 4002 or the instruction in the form of software.
  • the processor 4002 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 4003, and the processor 4002 reads the information in the memory 4003, and completes the steps of the instruction flow of the embodiment of the present invention in combination with the hardware thereof.
  • the network device When the network device is a base station, the network device may further include a communication interface module for communicating with other base stations or other network elements, such as a core network element.
  • the embodiment of the present application further provides a system, including the foregoing apparatus for CSI feedback and the apparatus for CSI obtaining, and the system may be a communication system or other systems.
  • the content reported by the UE meets the threshold requirement.
  • the UE reports the neighboring cell interference (or the neighboring cell channel state)
  • only the threshold is met, so the UE can determine the strength of the neighbor cell interference (or the neighbor cell channel quality) through the threshold value (or good or bad).
  • the base station in this area excludes weak interference that does not help the scheduling of the serving base station (or provides better cooperation point information for cooperative transmission).
  • the feedback overhead is reduced, and on the other hand, the serving base station (the base station to which the serving cell belongs) is more efficient to execute the scheduling algorithm.
  • the number of strongest interferences that can be reported in one neighboring cell (the number of channels with the best channel quality) is predefined or pre-configured, which regulates UE behavior, avoids the occurrence of malicious UEs, and can reduce the feedback amount of the UE.
  • the reported neighbor interference includes the channel RI and PMI measured by the UE to the neighboring base station, and does not include the CQI information. Compared with all the measurement information in the prior art, the feedback overhead of the CQI is reduced.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • at least one of A, B, or C means that at least one of the sets (A, B, C), such as A, B, C, A, and B, A and C, is selected. B and C, or, A and B and C, etc.
  • 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 transceivers, devices or units, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processor, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital STA line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • the computer program instructions can be provided to a general purpose computer, a special purpose computer, an embedded processor, or a processor of other programmable data processing device such that instructions executed by a processor of the computer or other programmable data processing device can be implemented in a flowchart
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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

Abstract

Des modes de réalisation de la présente invention concernent un procédé et un dispositif de rétroaction d'information d'état de canal (CSI). Le procédé comprend les étapes suivantes : un équipement utilisateur reçoit M groupes d'informations de configuration de CSI d'un dispositif de réseau, M étant un entier supérieur ou égal à un, et les groupes M des informations de configuration de CSI comprenant des informations de configuration de CSI correspondant à une cellule de desserte de l'équipement utilisateur ; et l'équipement utilisateur renvoie, selon les informations de configuration CSI, N groupes de M groupes de CSI correspondant aux M groupes des informations de configuration de CSI, N étant un entier supérieur ou égal à zéro et inférieur ou égal à M. Le procédé peut réduire le surdébit de rétroaction CSI et améliorer l'efficacité de la rétroaction CSI.
PCT/CN2017/097146 2016-08-11 2017-08-11 Procédé et dispositif de rétroaction d'état de canal Ceased WO2018028687A1 (fr)

Priority Applications (2)

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EP17838817.9A EP3496288A4 (fr) 2016-08-11 2017-08-11 Procédé et dispositif de rétroaction d'état de canal
US16/267,847 US20190173549A1 (en) 2016-08-11 2019-02-05 Channel state feedback method and apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201610665881 2016-08-11
CN201610665881.8 2016-08-11
CN201610879250.6A CN107743042A (zh) 2016-08-11 2016-09-30 一种信道状态反馈的方法及装置
CN201610879250.6 2016-09-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023193810A1 (fr) * 2022-04-08 2023-10-12 大唐移动通信设备有限公司 Procédé et appareil de traitement de csi, dispositif et support de stockage
WO2024108356A1 (fr) * 2022-11-21 2024-05-30 Oppo广东移动通信有限公司 Procédé de rétroaction de csi, dispositif transmetteur et dispositif récepteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102377469A (zh) * 2011-09-30 2012-03-14 中兴通讯股份有限公司 一种多点信道信息反馈方法、系统及终端
WO2012100587A1 (fr) * 2011-01-24 2012-08-02 中兴通讯股份有限公司 Procédé et dispositif de compression de données de rétroaction dans le cadre d'une transmission multipoint coordonnée
US20120275420A1 (en) * 2010-01-15 2012-11-01 Huawei Technologies Co., Ltd. Method and User Equipment for Feeding Back Multi-Cell Channel State Information
CN103546208A (zh) * 2012-07-09 2014-01-29 电信科学技术研究院 一种非周期信道状态信息的传输方法、设备及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120275420A1 (en) * 2010-01-15 2012-11-01 Huawei Technologies Co., Ltd. Method and User Equipment for Feeding Back Multi-Cell Channel State Information
WO2012100587A1 (fr) * 2011-01-24 2012-08-02 中兴通讯股份有限公司 Procédé et dispositif de compression de données de rétroaction dans le cadre d'une transmission multipoint coordonnée
CN102377469A (zh) * 2011-09-30 2012-03-14 中兴通讯股份有限公司 一种多点信道信息反馈方法、系统及终端
CN103546208A (zh) * 2012-07-09 2014-01-29 电信科学技术研究院 一种非周期信道状态信息的传输方法、设备及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3496288A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023193810A1 (fr) * 2022-04-08 2023-10-12 大唐移动通信设备有限公司 Procédé et appareil de traitement de csi, dispositif et support de stockage
WO2024108356A1 (fr) * 2022-11-21 2024-05-30 Oppo广东移动通信有限公司 Procédé de rétroaction de csi, dispositif transmetteur et dispositif récepteur

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