WO2014075282A1 - 接入方法及设备 - Google Patents

接入方法及设备 Download PDF

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Publication number
WO2014075282A1
WO2014075282A1 PCT/CN2012/084724 CN2012084724W WO2014075282A1 WO 2014075282 A1 WO2014075282 A1 WO 2014075282A1 CN 2012084724 W CN2012084724 W CN 2012084724W WO 2014075282 A1 WO2014075282 A1 WO 2014075282A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission point
reference signal
indication information
terminal
precoding matrix
Prior art date
Application number
PCT/CN2012/084724
Other languages
English (en)
French (fr)
Inventor
王建国
周永行
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280077129.1A priority Critical patent/CN104782210B/zh
Priority to EP12888265.1A priority patent/EP2919541B1/en
Priority to PCT/CN2012/084724 priority patent/WO2014075282A1/zh
Publication of WO2014075282A1 publication Critical patent/WO2014075282A1/zh
Priority to US14/715,037 priority patent/US9713101B2/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636Feedback format
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/04Arrangements for maintaining operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085Hand-off measurements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/27Control channels or signalling for resource management between access points
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0632Channel quality parameters, e.g. channel quality indicator [CQI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0665Feed forward of transmit weights to the receiver

Definitions

  • the present application relates to communication technologies, and in particular, to an access method and device. Background technique
  • one cell identifier may correspond to one transmission point (TP), or one cell identifier may correspond to multiple TPs, and each TP usually has a different reference signal ( Reference Signal, RS) resources, which can be distinguished by different indexes, such as virtual identifiers.
  • the TP may include an access point (AP), a macro base station, and a low power node, for example, a micro base station (Micro), a pico base station (Pico), and a remote radio head (RRH). Relay and Femto.
  • Each TP needs to send RS configuration information indicating the RS resource corresponding to the TP to the terminal, so that the terminal can receive the RS by using the RS configuration information, so that the RS is used to measure the channel between the terminal and the corresponding TP.
  • the TP currently received by the terminal receives the measurement result reported by the terminal, and uses Cell Range Expansion (CRE) to introduce the offset of the cell handover, so that the terminal accesses the other TP, so as to implement load splitting of the TP, which can improve The throughput of a wireless communication system.
  • CRE Cell Range Expansion
  • the existing access method may cause the terminal to access an inappropriate TP (for example, RRH), that is, a channel between the terminal and other TPs (for example, a macro base station in a heterogeneous network deployment scenario).
  • TP for example, RRH
  • the channel between the terminal and the TP is strongly interfered with, so that the terminal cannot communicate with the TP through the TP, and the access reliability of the terminal is reduced.
  • aspects of the present application provide an access method and device for improving access reliability of a terminal.
  • An aspect of the present application provides an access method, including:
  • the terminal obtains at least two reference signal resources, where the at least two reference signal resources respectively correspond to the first transmission point and the at least one second transmission point, where the first transmission point is currently accessed by the terminal.
  • Transmission point
  • the terminal receives the reference signal by using the at least two reference signal resources;
  • the terminal obtains quality information of the reference signal according to the first precoding matrix and the reference signal;
  • the reference signal resource includes one or more of a CSI RS resource, a DM RS resource, and a CRS resource.
  • the foregoing aspect and any possible implementation manner further provide an implementation manner, in which the terminal uses the at least two reference signal resources to receive a reference signal, including:
  • the terminal by using the at least two reference signal resources, receiving a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the method further includes:
  • the terminal receives the first indication information sent by the first transmission point, where the first indication information is used to indicate the first precoding matrix.
  • the quality information of the reference signal includes one or more of RSRP, RSRQ, RSSI, and CQI.
  • the method further includes:
  • the second indication information that is sent by the one second transmission point, where the second indication information is used to indicate a second precoding matrix that matches the first channel used by the first transmission point, or the a second subset of the precoding matrix, wherein the second indication information is determined by the third indication point according to the received third indication information sent by the first transmission point, where the third indication information is used to indicate the a second precoding matrix or a subset of the second precoding matrix matched by the first channel used by the first transmission point;
  • the fourth indication information is used to indicate a third precoding matrix that matches the second channel or the a precoding matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information or the other precoding matrix in a subset of the third precoding matrix a subset, such that the one second transmission point selects an appropriate precoding matrix according to the fourth indication information, and precodes the downlink data of the terminal by using the selected precoding matrix to reduce
  • the first transmission point interferes with the one second transmission point, the first channel is a channel between the terminal and the first transmission point, and the second channel is the terminal and the A channel between a second transmission point.
  • the first transmission point sends the third indication information to the one second transmission point through an X2 interface.
  • Another aspect of the present application provides an access method, including:
  • the first transmission point sends the first indication information to the terminal, where the first indication information is used to indicate a first precoding matrix, and the first precoding matrix is used to adjust a quality of the reference signal received by the terminal, where the reference
  • the signal is received by the terminal according to at least two reference signal resources, where the at least two reference signal resources respectively correspond to different transmission units, and the transmission unit includes the first transmission point and at least one second transmission point, where The first transmission point is a transmission point currently accessed by the terminal;
  • the first transmission point receives the quality information of the reference signal sent by the terminal, and the quality information of the reference signal is the first precoding indicated by the terminal according to the reference signal and the first indication information.
  • the first transmission point instructs the terminal to access a second transmission point according to quality information of the reference signal.
  • the reference signal resource includes one or more of a CSI RS resource, a DM RS resource, and a CRS resource.
  • the reference signal includes a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the foregoing aspect and any possible implementation manner further provide an implementation manner, where quality information of the reference signal includes one or more of RSRP, RSRQ, RSSI, and CQI.
  • the foregoing aspect, and any possible implementation manner further provide an implementation manner, after the terminal accesses a second transmission point, the method further includes:
  • the second transmission point Determining, by the second transmission point, the second indication information according to the third indication information, where the second indication information is used to indicate a second precoding matrix that is used by the first transmission point to match the first channel or a subset of the second precoding matrix;
  • the second transmission point sends the second indication information to the terminal, so that the terminal sends fourth indication information to the one second transmission point according to the second indication information, where the fourth The indication information is used to indicate that the third precoding matrix or the subset of the third precoding matrix that matches the second channel is different from the second precoding matrix indicated by the second indication information or the first Determining, by the second transmission point, an appropriate precoding matrix according to the fourth indication information, and precoding the downlink data of the terminal by using the selected precoding matrix to reduce the first transmission point Interference with the one second transmission point, the first channel is a channel between the terminal and the first transmission point, and the second channel is the terminal and the second transmission point The channel between.
  • the first transmission point sending the third indication information to the one second transmission point including:
  • the first transmission point sends the third indication information to the one second transmission point through an X2 interface.
  • a terminal including:
  • a receiving unit configured to obtain at least two reference signal resources, where the at least two reference signal resources respectively correspond to the first transmission point and the at least one second transmission point, where the first transmission point is a transmission currently accessed by the terminal Point
  • the receiving unit is further configured to receive the reference signal by using the at least two reference signal resources, and transmit the reference signal to the processing unit;
  • the processing unit is configured to obtain quality information of the reference signal according to the first precoding matrix and the reference signal, and transmit quality information of the reference signal to the sending unit;
  • the sending unit is configured to send the quality information of the reference signal to the first transmission point, so that the first transmission point instructs the terminal to access a second transmission point.
  • the reference signal resource obtained by the receiving unit includes one or more of a CSI RS resource, a DM RS resource, and a CRS resource.
  • the quality information of the reference signal obtained by the processing unit includes one or more of RSRP, RSRQ, RSSI, and CQI.
  • the terminal accesses the one second transmission point, receiving the second indication information sent by the one second transmission point, and transmitting the second indication information to the sending unit, where the second indication
  • the information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is used by the first transmission point to match the first channel, where the second indication information is the one second transmission point according to the second transmission point.
  • the received third indication information sent by the first transmission point determines that the third indication information is used to indicate a second precoding matrix or the second preamble that is matched by the first transmission point and used by the first transmission point. a subset of the coding matrix;
  • the sending unit is also used for
  • a transmission point including:
  • a sending unit configured to send first indication information to the terminal, where the first indication information is used to indicate a first precoding matrix, where the first precoding matrix is used to adjust a quality of a reference signal received by the terminal,
  • the reference signal is that the terminal receives according to at least two reference signal resources, where the at least two reference signal resources respectively correspond to different transmission units, the transmission unit includes the transmission point and at least one second transmission point, and the transmission Point is the transmission point currently accessed by the terminal;
  • a receiving unit configured to receive quality information of the reference signal sent by the terminal, and transmit quality information of the reference signal to a processing unit, where quality information of the reference signal is based on the reference signal and The first precoding matrix indicated by the first indication information is obtained; the processing unit is configured to: according to the quality information of the reference signal, instruct the terminal to access a second transmission point.
  • the reference signal resource includes one or more of a CSI RS resource, a DM RS resource, and a CRS resource.
  • the reference signal includes a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the quality information of the reference signal received by the receiving unit includes one or more of RSRP, RSRQ, RSSI, and CQI.
  • the terminal accesses the one second transmission point, sending, to the one second transmission point, third indication information, where the third indication information is used to indicate that the transmission point uses a first channel that matches the first channel.
  • a second precoding matrix or a subset of the second precoding matrix such that Determining, by the second transmission point, the second indication information according to the third indication information, where the second indication information is used to indicate a second precoding matrix that matches the first channel used by the transmission point or the a subset of the second precoding matrix;
  • the second transmission point sends the second indication information to the terminal, so that the terminal sends fourth indication information to the one second transmission point according to the second indication information, where the fourth The indication information is used to indicate that the third precoding matrix or the subset of the third precoding matrix that matches the second channel is different from the second precoding matrix indicated by the second indication information or the first Determining, by the second transmission point, an appropriate precoding matrix according to the fourth indication information, and precoding the downlink data of the terminal by using the selected precoding matrix to reduce the transmission point pair
  • the interference of a second transmission point where the first channel is a channel between the terminal and the transmission point, and the second channel is a channel between the terminal and the one second transmission point.
  • a terminal including:
  • a receiver configured to obtain at least two reference signal resources, where the at least two reference signal resources respectively correspond to the first transmission point and the at least one second transmission point, where the first transmission point is a transmission currently accessed by the terminal Point
  • the receiver is further configured to: use the at least two reference signal resources, receive a reference signal, and transmit the reference signal to a processor;
  • the processor is configured to obtain quality information of the reference signal according to the first precoding matrix and the reference signal, and transmit quality information of the reference signal to the transmitter;
  • the transmitter is configured to send quality information of the reference signal to the first transmission point, so that the first transmission point instructs the terminal to access a second transmission point.
  • the reference signal resource obtained by the receiver includes one or more of a CSI RS resource, a DM RS resource, and a CRS resource.
  • the quality information of the reference signal obtained by the processor includes one or more of RSRP, RSRQ, RSSI, and CQI.
  • the terminal accesses the one second transmission point, receiving second indication information sent by the second transmission point, and transmitting the second indication information to the transmitter, where the second indication
  • the information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is used by the first transmission point to match the first channel, where the second indication information is the one second transmission point according to the second transmission point.
  • the received third indication information sent by the first transmission point determines that the third indication information is used to indicate a second precoding matrix or the second preamble that is matched by the first transmission point and used by the first transmission point. a subset of the coding matrix;
  • the transmitter is also used for
  • the fourth indication information is used to indicate a third precoding matrix or the third precoding matrix that matches the second channel. a subset of the second precoding matrix or the set indicated by the second indication information, such that the one second transmission point selects an appropriate precoding according to the fourth indication information to reduce the Interference of the first transmission point with the one second transmission point, the first channel is a channel between the terminal and the first transmission point, and the second channel is the terminal and the one The channel between the two transmission points.
  • a transmission point including: a transmitter, configured to send, to the terminal, the first indication information, where the first indication information is used to indicate a first precoding matrix, where the first precoding matrix is used to adjust a quality of a reference signal received by the terminal,
  • the reference signal is that the terminal receives according to at least two reference signal resources, where the at least two reference signal resources respectively correspond to different transmission units, the transmission unit includes the transmission point and at least one second transmission point, and the transmission Point is the transmission point currently accessed by the terminal;
  • a receiver configured to receive quality information of the reference signal sent by the terminal, and transmit quality information of the reference signal to a processor, where quality information of the reference signal is based on the reference signal and Obtaining, by the first indication information, the first precoding matrix;
  • the processor is configured to instruct the terminal to access a second transmission point according to the quality information of the reference signal.
  • the reference signal resource includes one or more of a CSI RS resource, a DM RS resource, and a CRS resource.
  • the reference signal includes a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the quality information of the reference signal received by the receiver includes one or more of RSRP, RSRQ, RSSI, and CQI.
  • the terminal accesses the one second transmission point, sending, to the one second transmission point, third indication information, where the third indication information is used to indicate that the transmission point uses a first channel that matches the first channel.
  • the third indication information is used to indicate that the transmission point uses a first channel that matches the first channel.
  • the second transmission point Determining, by the second transmission point, the second indication information according to the third indication information, where the second indication information is used to indicate a second precoding matrix that matches the first channel used by the transmission point or the a subset of the second precoding matrix;
  • the second transmission point sends the second indication information to the terminal, so that the terminal sends fourth indication information to the one second transmission point according to the second indication information, where the fourth The indication information is used to indicate a third precoding matrix or the third precoding that matches the second channel Selecting a suitable precoding matrix according to the fourth indication information indicated by the second indication information or the first transmission point according to the fourth indication information, in a subset of the matrix,
  • the interference of the transmission point to the one second transmission point, the first channel is a channel between the terminal and the transmission point
  • the second channel is the terminal and the second transmission point The channel between.
  • the embodiment of the present application obtains, according to the reference signal sent by the first precoding matrix and the first transmission point and the second transmission point, that the channel corresponding to each transmission point is precoded. Referencing the quality information of the signal, thereby enabling the terminal to obtain the quality information of the precoded reference signal more accurately, so that the first transmission point switches the terminal to a suitable second transmission point to implement each transmission The split between the points, thereby improving the access reliability of the terminal.
  • FIG. 1 is a schematic flowchart of an access method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of an access method according to another embodiment of the present application.
  • FIG. 3 is a schematic flowchart of an access method according to another embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of an access method according to another embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a transmission point according to another embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a transmission point according to another embodiment of the present application.
  • the technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application.
  • the embodiments are part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • CDMA Code Division Multiple Access
  • CDMA2000 CDMA2000
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • WiMAX Global Interoperability
  • the first transmission point or the second transmission point in the embodiment of the present invention may be a macro base station, for example, may be
  • a base station in a GSM system, a GPRS system or a CDMA system, or a base station (NodeB) in a CDMA2000 system or a WCDMA system, or an evolved base station (Evolved NodeB, eNB) in an LTE system. It may also be a network element such as an Access Service Network Base Station (ASN BS) in an access service network in a WiMAX network.
  • ASN BS Access Service Network Base Station
  • the first transmission point or the second transmission point in the embodiment of the present invention may be a low power node, for example, may be a micro base station (Micro), or may also be a pico base station (Pico), or may be a remote radio head (Remote).
  • the radio head, RRH, or a relay device, or a femto base station (Femto) is not limited in this embodiment of the present invention.
  • first transmission point and the second transmission point include an active antenna system (Active
  • Antenna System, AAS Antenna System, AAS base station antenna.
  • the terminal in the embodiment of the present invention may be a mobile station (Mobile Station, MS) in a GSM system, a GPRS system, or a CDMA system, or may be a network device such as a user equipment (User Equipment, UE) in a CDMA2000 system, a WCDMA system, or an LTE system. yuan.
  • FIG. 1 is a schematic flowchart of an access method according to an embodiment of the present disclosure, as shown in FIG. 1.
  • the terminal obtains at least two reference signal resources, where the at least two reference signal resources respectively correspond to the first transmission point and the at least one second transmission point, where the first transmission point is a transmission point currently accessed by the terminal.
  • the terminal uses the at least two reference signal resources to receive a reference signal.
  • the terminal obtains quality information of the reference signal according to the first precoding matrix and the reference signal.
  • the terminal sends the quality information of the reference signal to the first transmission point, so that the first transmission point indicates that the terminal accesses a second transmission point.
  • the first transmission point and the at least one second transmission point may have the same cell identity, or may also have different cell identifiers. That is, the at least two reference signal resources may be reference signal resources corresponding to a plurality of transmission points in one cell, or may be reference signal resources respectively corresponding to transmission points in different cells.
  • the reference signal resource may include a Channel State Information Reference Signal (CSI RS) resource, and a DeModulation Reference Signal (DM).
  • CSI RS Channel State Information Reference Signal
  • DM DeModulation Reference Signal
  • RS One or more of resource and Cell-specific Reference Signal (CRS) resources.
  • the CSI RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of a CSI RS in a Resource Block (RB), for example, a port number occupying different subcarriers or symbols or sequences;
  • the subframe configuration may be a subframe in which a CSI RS is transmitted. Period or offset.
  • the DM RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the DM RS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the DM RS is transmitted.
  • the subframe configuration may be predefined, and the terminal and the first transmission point are dual. The party knows.
  • the CRS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the CRS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the CRS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the terminal may obtain, by using the physical downlink shared channel (PDSCH), the first transmission point to be carried by the physical downlink shared channel (PDSCH).
  • the high-level signaling, or the downlink control information that is, the at least two reference signal resources that are sent by the physical downlink control channel (PDCCH) or the enhanced PDCCH (ePDCCH) And configured to obtain the at least two reference signal resources according to the at least two reference signal resource configuration information.
  • the high-level signaling may be a radio resource control (RRC) message
  • the at least two reference signal resource configuration information may be carried by using an information element (IE) in the RRC message
  • IE information element
  • the RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, and the like, which is not limited in this embodiment, and the IE of the existing RRC message is extended to carry the at least The two reference signal resource configuration information, or the RRC message may also be different from the RRC message existing in the prior art.
  • the high-level signaling may also be a Media Access Control (MAC) Control Element (CE) message, and the at least two reference signal resource configuration information is carried by adding a new MAC CE.
  • MAC Media Access Control
  • CE Control Element
  • the terminal may specifically receive, by using the at least two reference signal resources, a set of reference signals corresponding to the at least two reference signal resources. Or a subset of the reference signals.
  • the subset of the reference signal may be an indication that the first transmission point is sent by using the high layer signaling or the downlink control information, to indicate that a part of the reference signal is selected from the set of reference signals corresponding to the reference signal resource.
  • a subset of the reference signal for example, selecting a first reference signal from a set of reference signals corresponding to the reference signal resource, or using a first reference signal and a second reference signal as the reference signal a subset of.
  • the high-layer signaling may be an RRC message
  • the RRC message may be an RRC message in the RRC message, for example, an RRC connection reconfiguration (RRC CONNECTION RECONFIGURATION).
  • RRC CONNECTION RECONFIGURATION RRC CONNECTION RECONFIGURATION
  • the message and the like are not limited in this embodiment.
  • the IE message may be extended by the IE of the existing RRC message, or the RRC message may be different from the RRC message existing in the prior art.
  • the high layer signaling may also be a MAC CE message, and the indication is carried by adding a new MAC CE.
  • the subset of the reference signals may be predefined, for example, pre-defining a first reference signal selected from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a first reference signal Two reference signals are used as a subset of the reference signals.
  • the terminal may further receive the first indication information sent by the first transmission point (for example, the first precoding moment Index value), the first indication information is used to indicate the first precoding matrix.
  • the first indication information sent by the first transmission point (for example, the first precoding moment Index value)
  • the first indication information is used to indicate the first precoding matrix.
  • the first indication information may be that the first transmission point is sent to the terminal by using high layer signaling or downlink control information.
  • the first transmission point may specifically select the first precoding matrix from a preset precoding matrix set or a codebook.
  • the high layer signaling may be an RRC message
  • the first indication information may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC The CONNECTION RECONFIGURATION message, etc., is not limited in this embodiment, and the first indication information is carried by extending the IE of the existing RRC message, or the RRC message may be different from the prior art. RRC message.
  • the high-level signaling may also be a MAC CE message, and the first indication information is carried by adding a new MAC CE.
  • the index value may be a Rank Indicator (R1) and a Precoding Matrix Indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • R1 Rank Indicator
  • PMI Precoding Matrix Indicator
  • the first precoding matrix may be a precoding matrix indicated by the first indication information, or may be part of a precoding matrix indicated by the first indication information, for example, A matrix consisting of rows or columns of precoding matrices.
  • the terminal may further obtain the first indication information according to a pre-configuration, for example, a protocol contract from a predefined precoding matrix set or The first precoding matrix is selected in the codebook.
  • the first precoding matrix may be a precoding matrix that improves a beam tilt angle corresponding to the reference signal, so that the signal quality of the terminal may be increased; or may be a precoding that reduces a beam tilt angle corresponding to the reference signal.
  • the matrix can reduce the signal quality of the terminal. Therefore, the transmission point currently accessed by the terminal can be adjusted according to the terminal to be adjusted, in particular, the terminal at the edge of the coverage point of the transmission point and the transmission point and other transmission points.
  • the reference signal resources corresponding to the first transmission point and the second transmission point may be precoded by using the corresponding first precoding matrix, respectively, so that the terminal can obtain a reference more accurately.
  • the channel quality information after the signal is beam-adjusted; the reference signal resource corresponding to the first transmission point and the second transmission point may also be a reference signal resource that is not pre-coded by the first pre-coding matrix, thereby being capable of Reduce signaling overhead.
  • the quality information of the reference signal may include, but is not limited to, Reference Signal Received Power (RSRP), and reference signal received quality (Reference Signal Received Quality) , RSRQ), one or more of a Reference Signal Strength Indicator (RSI) and a Channel Quality Indicator (CQI).
  • RSRP Reference Signal Received Power
  • RSRQ reference signal received quality
  • RSI Reference Signal Strength Indicator
  • CQI Channel Quality Indicator
  • the UE obtains the RSRP of the reference signal according to the first precoding matrix and the reference signal.
  • the UE may obtain the reference signal according to a linear average of the received power obtained by precoding the first precoding matrix on the resource element (Resource Element, RE) carrying the reference signal, and the measured bandwidth.
  • RE Resource Element
  • one or more REk RE (i.e., RE set k) is obtained on H e mxn matrix, where m is the number of reception antennas, the number of transmit antenna ports is n-through after the first precoding matrix is a precoding Then, the UE can calculate the RSRP of the reference signal according to the following formula.
  • RSRP k ⁇ (H e ) ; ; (1 ) mn ⁇ ⁇ J
  • the UE can also use other applicable methods to obtain the RSRP of the reference signal, for example, multiplied by an appropriate scaling. Factors, etc.
  • the first precoding matrix can adjust the beam tilt angle, so that the signal quality obtained by the terminal from the reference signals of the respective transmission points can be adjusted. Therefore, the transmission point currently accessed by the terminal can adjust the association between the terminal, especially the terminal at the edge of the coverage of the transmission point, and the transmission point and other transmission points according to the needs of load balancing, thereby facilitating the connection between the transmission points. Data diversion. Simultaneously, according to the reference signal of the first transmission point and the second transmission point, and the first precoding matrix, the signal quality information after the precoding of the channel corresponding to each transmission point is obtained, so that the terminal can obtain the terminal more accurately. The quality information of the reference signal.
  • the terminal may specifically adopt a high layer signaling, a physical uplink control channel (PUCCH), or a physical uplink shared channel (Physical Uplink). Shared Channel, PUCCH), transmitting quality information of the reference signal to the first transmission point.
  • PUCCH Physical Uplink control channel
  • PUCCH Physical Uplink shared channel
  • the high-layer signaling may be an RRC message
  • the quality information of the reference signal may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, the RRC connection reconfiguration is completed.
  • the RRC CONNECTION RECONFIGURATION COMPLETE message, etc. is not limited in this embodiment.
  • the IE of the existing RRC message is extended to carry the quality information of the reference signal, or the RRC message may be different from the existing one. RRC messages already in the technology.
  • the high layer signaling may also be a MAC CE message, and the quality information of the reference signal is carried by adding a new MAC CE.
  • the terminal obtains the parameter after the precoding of the channel corresponding to each transmission point by using the reference signal sent by the terminal according to the first precoding matrix and the first transmission point and the second transmission point. Testing the quality information of the signal, so that the terminal can obtain the quality information of the pre-coded reference signal more accurately, so that the first transmission point switches the terminal to a suitable second transmission point, and realizes each transmission The split between the points, thereby improving the access reliability of the terminal.
  • FIG. 2 is a schematic flowchart of an access method according to another embodiment of the present application, as shown in FIG. 2.
  • the access method provided in this embodiment may further include:
  • the terminal receives the second indication information that is sent by the one second transmission point, where the second indication information is used to indicate a second precoding matrix or a location that is used by the first transmission point to match the first channel.
  • the second indication information is determined by the third indication information that is sent by the first transmission point according to the third indication information that is sent by the first transmission point, where the third indication information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is matched by the first transmission point and used by the first transmission point.
  • the terminal sends fourth indication information to the one second transmission point according to the second indication information, where the fourth indication information is used to indicate a third precoding matrix that matches the second channel or the a precoding matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information or the other precoding matrix in a subset of the third precoding matrix a subset, such that the one second transmission point selects an appropriate precoding matrix according to the fourth indication information, and precodes the downlink data of the terminal by using the selected precoding matrix to reduce
  • the first transmission point interferes with the one second transmission point, the first channel is a channel between the terminal and the first transmission point, and the second channel is the terminal and the A channel between a second transmission point.
  • the second precoding matrix indicated by the second indication information may include, but is not limited to, a precoding matrix that is forbidden to use, a precoding matrix that has been used, or a precoding matrix used for interference.
  • the second indication information may be an index value of the second precoding matrix; and the fourth indication information may be an index value of the other precoding matrix.
  • the index value may be a rank indicator (R1) and a precoding matrix indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • the second precoding matrix may include, but is not limited to, the first transmission point in each physical resource block (PRB), subband or A precoding matrix on the system bandwidth.
  • the third precoding matrix may include, but is not limited to, the second transmission point in each physical resource block (Physical Resource Block,
  • the first transmission point may send the third indication information to the one second transmission point by using an X2 interface.
  • the first transmission point may send the third indication information to the second transmission point by using another signaling or a backhaul mode, which is not limited in this embodiment.
  • the other precoding matrix indicated by the fourth indication information or the subset of the other precoding matrices is a third precoding that matches the second channel.
  • a matrix or a subset of the matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information in a subset of the matrix or the third precoding matrix .
  • the other precoding matrix or the subset of the other precoding matrices may be in a subset of the third precoding matrix or the third precoding matrix that matches the second channel, and the second pre A subset of the coding matrix or the subset of the second precoding matrix that is orthogonal or quasi-orthogonal or a subset of the precoding matrix.
  • a second precoding matrix or a subset of the second precoding matrix that matches the first channel used by the first transmission point indicated by the second indication information is denoted as P.
  • the terminal may determine a further precoding matrix indicated by the fourth indication information or a subset of the other precoding matrices according to equation (2).
  • y H 3 VS+n (2)
  • y the received signal vector
  • H 3 is the channel matrix between the terminal and the one second transmission point
  • V is the other precoding matrix or the other precoding A subset of the matrix
  • S is the modulation symbol vector transmitted by the one second transmission point
  • n is interference and noise.
  • the V is a matrix other than P or a subset of the matrix of the third precoding matrix or the third precoding matrix that matches the second channel, for example, orthogonal or quasi-P An orthogonal matrix or a subset of the matrix.
  • the terminal may determine another precoding matrix indicated by the fourth indication information or a subset of the other precoding matrices according to equation (3).
  • y H 3 VS + H 4 Pq + n (3)
  • y is the received signal vector and H 3 is the channel between the terminal and the one second transmission point a matrix
  • is a channel matrix between the terminal and the first transmission point
  • is a subset of the other precoding matrix or the other precoding matrix
  • S is a modulation symbol vector transmitted by the first transmission point
  • n is interference and noise.
  • H 4 Pq acts as an interference term for the terminal.
  • the second indication information that is sent by the second transmission point to which the terminal is switched is received by the terminal, where the second indication information is used to indicate that the first transmission point is used to match the first channel.
  • the second precoding matrix matched by the transmission channel or the subset of the second precoding matrix used by the transmission point to more accurately feed back the available precoding matrix to the second transmission point, which can effectively avoid the first transmission point
  • the interference caused by the second precoding matrix matched with the first channel is used to further improve the throughput of the terminal and the second transmission point.
  • FIG. 3 is a schematic flowchart of an access method according to another embodiment of the present application, as shown in FIG. 3.
  • the first transmission point sends a first indication information (for example, an index value of the first precoding moment) to the terminal, where the first indication information is used to indicate a first precoding matrix, and the first precoding matrix
  • the reference signal is that the terminal receives according to at least two reference signal resources, and the at least two reference signal resources respectively correspond to different transmission units, where the transmission unit includes The first transmission point and the at least one second transmission point, where the first transmission point is a transmission point currently accessed by the terminal.
  • the first transmission point receives the quality information of the reference signal sent by the terminal, and the quality information of the reference signal is the first indicated by the terminal according to the reference signal and the first indication information.
  • the precoding matrix is obtained.
  • the first transmission point instructs the terminal to access a second transmission point according to quality information of the reference signal.
  • the first transmission point and the at least one second transmission point may have the same cell identifier, or may have different cells.
  • logo That is, the at least two reference signal resources may be reference signal resources respectively corresponding to multiple transmission points in one cell, or may be reference signal resources respectively corresponding to transmission points in different cells.
  • the reference signal resource may include a Channel State Information Reference Signal (CSI RS) resource, and a Demodulation Reference Signal (DM).
  • CSI RS Channel State Information Reference Signal
  • DM Demodulation Reference Signal
  • RS One or more of resource and Cell-specific Reference Signal (CRS) resources.
  • the CSI RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of a CSI RS in a Resource Block (RB), for example, a port number occupying different subcarriers or symbols or sequences;
  • the subframe configuration may be a subframe in which a CSI RS is transmitted. Period or offset.
  • the DM RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the DM RS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the DM RS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the CRS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the CRS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the CRS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the first transmission point may be configured by using a higher layer signaling (ie, the physical downlink shared channel (PDSCH) carries the high layer signaling) Or the downlink control information (that is, the downlink control information is carried by the Physical Downlink Control Channel (PDCCH) or the enhanced PDCCH (ePDCCH)), and the at least two reference signal resources are sent to the terminal. And configuring the information, so that the terminal obtains the at least two reference signal resources according to the at least two reference signal resource configuration information.
  • a higher layer signaling ie, the physical downlink shared channel (PDSCH) carries the high layer signaling
  • the downlink control information that is, the downlink control information is carried by the Physical Downlink Control Channel (PDCCH) or the enhanced PDCCH (ePDCCH)
  • ePDCCH enhanced PDCCH
  • the high-level signaling may be a Radio Resource Control (RRC) message, and may specifically pass an information element (Information Element, in an RRC message).
  • RRC Radio Resource Control
  • the IE carries the at least two reference signal resource configuration information, and the RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, etc., which is not limited in this embodiment.
  • the at least two reference signal resource configuration information is carried by extending the IE of the existing RRC message, or the RRC message may also be an RRC message different from the existing ones in the prior art.
  • the high-level signaling may also be a Media Access Control (MAC) Control Element (CE) message, and the at least two reference signal resource configuration information is carried by adding a new MAC CE.
  • MAC Media Access Control
  • CE Control Element
  • the reference signal may include, but is not limited to, a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the terminal may specifically receive, by using the at least two reference signal resources, a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the subset of the reference signal may be an indication that the first transmission point is sent by using the high layer signaling or the downlink control information, to indicate that a part of the reference signal is selected from the set of reference signals corresponding to the reference signal resource.
  • a subset of the reference signal for example, selecting a first reference signal from a set of reference signals corresponding to the reference signal resource, or using a first reference signal and a second reference signal as the reference signal a subset of.
  • the high-layer signaling may be an RRC message
  • the RRC message may be an RRC message in the RRC message, for example, an RRC connection reconfiguration (RRC CONNECTION RECONFIGURATION).
  • RRC CONNECTION RECONFIGURATION RRC CONNECTION RECONFIGURATION
  • the message and the like are not limited in this embodiment.
  • the IE message may be extended by the IE of the existing RRC message, or the RRC message may be different from the RRC message existing in the prior art.
  • the high layer signaling may also be a MAC CE message, and the indication is carried by adding a new MAC CE.
  • the subset of the reference signals may be predefined, for example, pre-defining a first reference signal selected from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a first reference signal Two reference signals are used as a subset of the reference signals.
  • the first indication information may be that the first transmission point is sent to the terminal by using high layer signaling or downlink control information.
  • the first transmission point may specifically select the first precoding matrix from a preset precoding matrix set or a codebook.
  • the high layer signaling may be an RRC message
  • the first indication information may be carried by the IE in the RRC message, where the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC The CONNECTION RECONFIGURATION message, etc., is not limited in this embodiment, and the first indication information is carried by extending the IE of the existing RRC message, or the RRC message may be different from the prior art. RRC message.
  • the high-level signaling may also be a MAC CE message, and the first indication information is carried by adding a new MAC CE.
  • the index value may be a Rank Indicator (R1) and a Precoding Matrix Indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • R1 Rank Indicator
  • PMI Precoding Matrix Indicator
  • the first precoding matrix may be a precoding matrix indicated by the first indication information, or may be part of a precoding matrix indicated by the first indication information, for example, A matrix consisting of rows or columns of precoding matrices.
  • the first precoding matrix may be a precoding matrix that improves a beam tilt angle corresponding to the reference signal, so that the signal quality of the terminal may be increased; or may be a precoding that reduces a beam tilt angle corresponding to the reference signal.
  • the matrix can reduce the signal quality of the terminal. Therefore, the transmission point currently accessed by the terminal can be adjusted according to the terminal to be adjusted, in particular, the terminal at the edge of the coverage point of the transmission point and the transmission point and other transmission points.
  • the reference signal resources corresponding to the first transmission point and the second transmission point may be precoded by using the corresponding first precoding matrix, respectively, so that the terminal can obtain a reference more accurately.
  • the channel quality information after the signal is beam-adjusted; the reference signal resource corresponding to the first transmission point and the second transmission point may also be a reference signal resource that is not pre-coded by the first pre-coding matrix, thereby being capable of Reduce signaling overhead.
  • the quality information of the reference signal may include, but is not limited to, Reference Signal Received Power (RSRP), and reference signal received quality (Reference Signal Received Quality) , RSRQ), one or more of a Reference Signal Strength Indicator (RSI) and a Channel Quality Indicator (CQI).
  • RSRP Reference Signal Received Power
  • RSRQ reference signal received quality
  • RSI Reference Signal Strength Indicator
  • CQI Channel Quality Indicator
  • the UE is described in detail according to the first precoding matrix and
  • the reference signal obtains an RSRP of the reference signal.
  • the UE may obtain the reference signal according to a linear average of the received power obtained by precoding the first precoding matrix on the resource element (Resource Element, RE) carrying the reference signal, and the measured bandwidth.
  • RE Resource Element
  • one or more REk RE (i.e., RE set k) is obtained on H e mxn matrix, where m is the number of reception antennas, the number of transmit antenna ports is n-through after the first precoding matrix is a precoding Then, the UE can calculate the RSRP of the reference signal according to the following formula.
  • the UE can also obtain RSRP of the reference signal by using other applicable methods, for example, multiplying by a suitable scaling factor and the like.
  • the first precoding matrix can adjust the beam tilt angle, so that the signal quality obtained by the terminal from the reference signals of the respective transmission points can be adjusted. Therefore, the transmission point currently accessed by the terminal can adjust the association between the terminal, especially the terminal at the edge of the coverage of the transmission point, and the transmission point and other transmission points according to the needs of load balancing, thereby facilitating the connection between the transmission points. Data diversion. Simultaneously, according to the reference signal of the first transmission point and the second transmission point, and the first precoding matrix, the signal quality information after the precoding of the channel corresponding to each transmission point is obtained, so that the terminal can obtain the terminal more accurately. The quality information of the reference signal.
  • the first transmission point may receive the terminal through a high-level signaling, a physical uplink control channel (PUCCH), or Physical Uplink Shared Channel (PUCCH), the quality information of the reference signal transmitted.
  • a high-level signaling a physical uplink control channel (PUCCH), or Physical Uplink Shared Channel (PUCCH)
  • PUCCH Physical Uplink Shared Channel
  • the high layer signaling may be an RRC message
  • the quality information of the reference signal may be carried by an IE in the RRC message, where the RRC message may be a RRC in the prior art.
  • the RRC CONNECTION RECONFIGURATION COMPLETE message, etc. is not limited in this embodiment, and the IE of the existing RRC message is extended to carry the quality information of the reference signal, or The RRC message may also be an RRC message different from that existing in the prior art.
  • the high layer signaling may also be a MAC CE message, and the quality information of the reference signal is carried by adding a new MAC CE.
  • the quality information of the reference signal after the precoding of the channel corresponding to each transmission point is obtained by the terminal according to the reference signal sent by the first precoding matrix and the first transmission point and the second transmission point. So that the terminal can obtain the quality information of the precoded reference signal more accurately, so that the first transmission point switches the terminal to a suitable second transmission point, and realizes the shunting between the transmission points. , thereby improving the access reliability of the terminal.
  • FIG. 4 is a schematic flowchart of an access method according to another embodiment of the present application, as shown in FIG. 4. Compared with the embodiment corresponding to FIG. 3, after 303, the access method provided in this embodiment may further include:
  • the first transmission point sends third indication information to the one second transmission point, where the third indication information is used to indicate a second precoding matrix that is used by the first transmission point to match the first channel. Or a subset of the second precoding matrix.
  • the second transmission point may be configured to determine the second indication information according to the third indication information, where the second indication information is used to indicate that the first transmission point uses the first channel that matches the first channel. a second precoding matrix or a subset of the second precoding matrix; and the second transmission point sends the second indication information to the terminal, so that the terminal according to the second indication information Transmitting, by the second transmission point, fourth indication information, where the fourth indication information is used to indicate a third precoding matrix or a subset of the third precoding matrix that is matched with the second channel, except the second indication
  • the second precoding matrix or the subset transmission point of the second precoding matrix indicated by the information, according to the fourth indication information select an appropriate precoding matrix, and use the selected precoding matrix pair Decoding the downlink data of the terminal to reduce interference of the first transmission point to the one second transmission point, where the first channel is the terminal and the first transmission point Between the channel, the second channel to the terminal and the second channel between a transmission point.
  • the second precoding matrix indicated by the second indication information may include but is not limited to The precoding matrix used, the precoding matrix that has been used, or the precoding matrix used for interference.
  • the second indication information may be an index value of the second precoding matrix; and the fourth indication information may be an index value of the other precoding matrix.
  • the index value may be a rank indicator (R1) and a precoding matrix indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • the second precoding matrix may include, but is not limited to, the first transmission point in each physical resource block (Physical Resource Block,
  • the third precoding matrix may include, but is not limited to, the second transmission point in each physical resource block (Physical Resource Block,
  • the first transmission point may send the third indication information to the one second transmission point by using an X2 interface.
  • the first transmission point may send the third indication information to the second transmission point by using another signaling or a backhaul mode, which is not limited in this embodiment.
  • the other precoding matrix indicated by the fourth indication information or the subset of the other precoding matrices is a third precoding that matches the second channel.
  • a matrix or a subset of the matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information in a subset of the matrix or the third precoding matrix .
  • the other precoding matrix or the subset of the other precoding matrices may be in a subset of the third precoding matrix or the third precoding matrix that matches the second channel, and the second pre A subset of the coding matrix or the subset of the second precoding matrix that is orthogonal or quasi-orthogonal or a subset of the precoding matrix.
  • a second precoding matrix or a subset of the second precoding matrix that matches the first channel used by the first transmission point indicated by the second indication information is denoted as P.
  • the terminal may determine a further precoding matrix indicated by the fourth indication information or a subset of the other precoding matrices according to equation (2).
  • y H 3 VS + n (2)
  • y the received signal vector
  • H 3 is the channel matrix between the terminal and the one second transmission point
  • V is the other precoding matrix or the other precoding a subset of the matrix
  • S is the one The modulation symbol vector transmitted by the second transmission point
  • n is interference and noise.
  • the V is a matrix other than P or a subset of the matrix of the third precoding matrix or the third precoding matrix that matches the second channel, for example, orthogonal or quasi-P An orthogonal matrix or a subset of the matrix.
  • the terminal may determine another precoding matrix indicated by the fourth indication information or a subset of the other precoding matrices according to equation (3).
  • y H 3 VS + H 4 Pq + n (3)
  • y is the received signal vector
  • H 3 is the channel matrix between the terminal and the second transmission point
  • is the terminal and the first transmission point
  • a channel matrix between, ⁇ is a subset of the other precoding matrix or the other precoding matrix
  • S is a modulation symbol vector transmitted by the first transmission point
  • n is interference and noise.
  • H 4 Pq acts as an interference term for the terminal.
  • the third indication information is sent to the one second transmission point by using the first transmission point, where the third indication information is used to indicate that the first transmission point uses the first channel that matches the first channel.
  • a second precoding matrix or a subset of the second precoding matrix and the second transmission point determines the second indication information according to the third indication information, and sends the second indication information to the terminal, where the second indication information a second precoding matrix or a subset of the second precoding matrix matching the first channel used by the first transmission point to enable the terminal to use according to the first transmission point.
  • the second precoding matrix matched by the first channel or the subset of the second precoding matrix can more accurately feed back the available precoding matrix to the second transmission point, which can effectively avoid the first transmission point and the first transmission point.
  • the channel-matched second precoding matrix causes interference to the terminal, thereby further improving the throughput of the terminal and the second transmission point.
  • FIG. 5 is a schematic structural diagram of a terminal according to another embodiment of the present application, as shown in FIG. 5.
  • the terminal of this embodiment may include a receiving unit 51, a processing unit 52, and a transmitting unit 53.
  • the receiving unit 51 is configured to obtain at least two reference signal resources, where the at least two reference signal resources respectively correspond to the first transmission point and the at least one second transmission point, where the first transmission point is currently connected to the terminal.
  • the receiving unit 51 is further configured to receive the reference signal by using the at least two reference signal resources, and transmit the reference signal to the processing unit 52.
  • the processing unit 52 is configured to use a precoding matrix and the reference signal, obtaining quality information of the reference signal, and transmitting quality information of the reference signal to the transmitting unit 53; the sending unit 53, configured to send to the first transmission point
  • the quality information of the reference signal is such that the first transmission point indicates that the terminal accesses a second transmission point.
  • the first transmission point and the at least one second transmission point may have the same cell identity, or may also have different cell identifiers. That is, the at least two reference signal resources may be reference signal resources corresponding to a plurality of transmission points in one cell, or may be reference signal resources respectively corresponding to transmission points in different cells.
  • the reference signal resource obtained by the receiving unit 51 may include a channel state information reference signal (CSI RS) resource, a demodulation reference.
  • CSI RS channel state information reference signal
  • DM RS DeModulation Reference Signal
  • CRS Cell-specific Reference Signal
  • the CSI RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of a CSI RS in a Resource Block (RB), for example, a port number occupying different subcarriers or symbols or sequences;
  • the subframe configuration may be a subframe in which a CSI RS is transmitted. Period or offset.
  • the DM RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the DM RS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the DM RS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the CRS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the CRS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the CRS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the receiving unit 51 may specifically obtain that the first transmission point is carried by high-layer signaling (that is, by a Physical Downlink Shared Channel (PDSCH)
  • high-level signaling or the downlink control information that is, the at least two references that are sent by the physical downlink control channel (PDCCH) or the enhanced PDCCH (ePDCCH) to carry the downlink control information
  • the signal resource configuration information is obtained according to the at least two reference signal resource configuration information, and the at least two reference signal resources are obtained.
  • the high-level signaling may be a radio resource control (RRC) message
  • the at least two reference signal resource configuration information may be carried by using an information element (IE) in the RRC message
  • IE information element
  • the RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, and the like, which is not limited in this embodiment, and the IE of the existing RRC message is extended to carry the at least The two reference signal resource configuration information, or the RRC message may also be different from the RRC message existing in the prior art.
  • the high-level signaling may also be a Media Access Control (MAC) Control Element (CE) message, and the at least two reference signal resource configuration information is carried by adding a new MAC CE.
  • MAC Media Access Control
  • CE Control Element
  • the receiving unit 51 is specifically configured to receive, by using the at least two reference signal resources, a set of reference signals corresponding to the at least two reference signal resources. Or a subset of the reference signals.
  • the subset of the reference signal may be an indication that the first transmission point is sent by using the high layer signaling or the downlink control information, to indicate that a part of the reference signal is selected from the set of reference signals corresponding to the reference signal resource.
  • a subset of the reference signal for example, selecting a first reference signal from a set of reference signals corresponding to the reference signal resource, or using a first reference signal and a second reference signal as the reference signal a subset of.
  • the high layer signaling may be an RRC message, and may specifically pass the IE in the RRC message.
  • the RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, etc., which is not limited in this embodiment, by using an existing RRC message.
  • the IE performs the extension to carry the indication, or the RRC message may also be an RRC message different from that existing in the prior art.
  • the high layer signaling may also be a MAC CE message, and the indication is carried by adding a new MAC CE.
  • the subset of the reference signals may be predefined, for example, pre-defining a first reference signal selected from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a first reference signal Two reference signals are used as a subset of the reference signals.
  • the receiving unit 51 may be further configured to receive first indication information that is sent by the first transmission point (for example, the first precoding moment Index value), the first indication information is used to indicate the first precoding matrix.
  • the first indication information may be that the first transmission point is sent to the terminal by using high layer signaling or downlink control information.
  • the first transmission point may specifically select the first precoding matrix from a preset precoding matrix set or a codebook.
  • the high layer signaling may be an RRC message
  • the first indication information may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC The CONNECTION RECONFIGURATION message, etc., is not limited in this embodiment, and the first indication information is carried by extending the IE of the existing RRC message, or the RRC message may be different from the prior art. RRC message.
  • the high-level signaling may also be a MAC CE message, and the first indication information is carried by adding a new MAC CE.
  • the index value may be a Rank Indicator (R1) and a Precoding Matrix Indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • R1 Rank Indicator
  • PMI Precoding Matrix Indicator
  • the first precoding matrix may be a precoding matrix indicated by the first indication information, or may be part of a precoding matrix indicated by the first indication information, for example, A matrix consisting of rows or columns of precoding matrices.
  • the receiving unit 51 is further Further for obtaining the first indication information according to pre-configuration, for example, the protocol stipulates selecting the first pre-coding matrix from a predefined pre-coding matrix set or codebook.
  • the first precoding matrix may be a precoding matrix that improves a beam tilt angle corresponding to the reference signal, so that the signal quality of the terminal may be increased; or may be a precoding that reduces a beam tilt angle corresponding to the reference signal.
  • the matrix can reduce the signal quality of the terminal. Therefore, the transmission point currently accessed by the terminal can be adjusted according to the terminal to be adjusted, in particular, the terminal at the edge of the coverage point of the transmission point and the transmission point and other transmission points.
  • the reference signal resources corresponding to the first transmission point and the second transmission point may be precoded by using the corresponding first precoding matrix, respectively, so that the terminal can obtain a reference more accurately.
  • the channel quality information after the signal is beam-adjusted; the reference signal resource corresponding to the first transmission point and the second transmission point may also be a reference signal resource that is not pre-coded by the first pre-coding matrix, thereby being capable of Reduce signaling overhead.
  • the quality information of the reference signal obtained by the processing unit 52 may include, but is not limited to, a reference signal received power (RSRP), a reference signal.
  • RSRP reference signal received power
  • RSSI Reference Signal Received Quality
  • RSI Reference Signal Strength Indicator
  • CQI Channel Quality Indicator
  • the sending unit 53 may be configured by using a high-level signaling, a physical uplink control channel (PUCCH), or a physical uplink shared channel (Physical Uplink Shared Channel). , PUCCH), transmitting quality information of the reference signal to the first transmission point.
  • PUCCH Physical Uplink Control Channel
  • PUCCH Physical Uplink Shared Channel
  • the high-layer signaling may be an RRC message
  • the quality information of the reference signal may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, the RRC connection reconfiguration is completed.
  • the RRC CONNECTION RECONFIGURATION COMPLETE message, etc. is not limited in this embodiment.
  • the IE of the existing RRC message is extended to carry the quality information of the reference signal, or the RRC message may be different from the existing one. RRC messages already in the technology.
  • the high layer signaling may also be a MAC CE message, and the quality information of the reference signal is carried by adding a new MAC CE.
  • the terminal obtains, by the processing unit, the reference signal after the precoding of the channel corresponding to each transmission point according to the reference signal sent by the first precoding matrix and the first transmission point and the second transmission point. Quality information, thereby enabling the terminal to obtain quality information of the precoded reference signal more accurately, so that the first transmission point switches the terminal to a suitable second transmission point to achieve between the transmission points The shunting improves the access reliability of the terminal.
  • the receiving unit 51 may be further configured to: after the terminal accesses the one second transmission point, receive the second transmission point.
  • Sending the second indication information, and transmitting the second indication information to the sending unit 53 the second indication information is used to indicate the second precoding that is matched by the first transmission point and used by the first channel a matrix or a subset of the second precoding matrix, where the second indication information is determined by the third indication point according to the received third indication information sent by the first transmission point, where the third indication information is a second precoding matrix or a subset of the second precoding matrix matching the first channel used by the first transmission point; correspondingly, the sending unit 53 may further be used according to the The second indication information is sent to the second transmission point, where the fourth indication information is used to indicate a third precoding matrix or the third precoding that matches the second channel.
  • the second transmission point is selected according to the fourth indication information, and a suitable precoding matrix is selected.
  • the first channel is a channel between the terminal and the first transmission point
  • the second channel is the terminal and the one The channel between the two transmission points.
  • the second precoding matrix indicated by the second indication information may include, but is not limited to, a precoding matrix that is forbidden to use, a precoding matrix that has been used, or a precoding matrix used for interference.
  • the second indication information may be an index value of the second precoding matrix; and the fourth indication information may be an index value of the other precoding matrix.
  • the index value may be a rank indicator (R1) and a precoding matrix indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • the second precoding matrix may include, but is not limited to, the first transmission point in each physical resource block (Physical Resource Block, PRB), subband or precoding matrix over the system bandwidth.
  • PRB Physical Resource Block
  • the third precoding matrix may include, but is not limited to, the second transmission point in each physical resource block (Physical Resource Block,
  • the first transmission point may send the third indication information to the second transmission point by using another signaling or a backhaul mode, which is not limited in this embodiment.
  • the other precoding matrix indicated by the fourth indication information or the subset of the other precoding matrices is a third precoding that matches the second channel.
  • a matrix or a subset of the matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information in a subset of the matrix or the third precoding matrix .
  • the other precoding matrix or the subset of the other precoding matrices may be in a subset of the third precoding matrix or the third precoding matrix that matches the second channel, and the second pre A subset of the coding matrix or the subset of the second precoding matrix that is orthogonal or quasi-orthogonal or a subset of the precoding matrix.
  • the terminal receives, by the receiving unit, second indication information that is sent by the one second transmission point that is sent by the terminal, where the second indication information is used to indicate that the first transmission point is used by the first a second precoding matrix of the channel matching or a subset of the second precoding matrix, where the second indication information is determined by the one second transmission point according to the received third indication information sent by the first transmission point
  • the third indication information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is matched by the first transmission point and used by the first transmission point, so that the sending unit can be configured according to the a second precoding matrix matched by the first channel or a subset of the second precoding matrix used by a transmission point to more accurately feed back the available precoding matrix to the second transmission point, which can effectively avoid the first transmission point
  • the interference caused by the second precoding matrix matched with the first channel to the terminal further improves the throughput of the terminal and the second transmission point.
  • FIG. 6 is a schematic structural diagram of a transmission point according to another embodiment of the present application, as shown in FIG. 6.
  • the transmission point of this embodiment may include a transmitting unit 61, a receiving unit 62, and a processing unit 63.
  • the sending unit 61 is configured to send the first indication information to the terminal, where the first indication information is used to indicate a first precoding matrix, where the first precoding matrix is used to adjust a quality of the reference signal received by the terminal.
  • the reference signal is that the terminal receives according to at least two reference signal resources, where the at least two reference signal resources respectively correspond to different transmission units, where the transmission unit includes the transmission point and At least one second transmission point, where the transmission point is a transmission point currently accessed by the terminal;
  • the method is configured to receive quality information of the reference signal sent by the terminal, and transmit quality information of the reference signal to the processing unit 63, where quality information of the reference signal is that the terminal according to the reference signal and The first precoding matrix indicated by the first indication information is obtained; the processing unit 63 is configured to instruct the terminal to access a second transmission point according to the quality information of the reference signal.
  • the transmission point and the at least one second transmission point may have the same cell identity, or may also have different cell identifiers. That is, the at least two reference signal resources may be reference signal resources respectively corresponding to multiple transmission points in one cell, or may be reference signal resources corresponding to transmission points in different cells respectively.
  • the reference signal resource may include a Channel State Information Reference Signal (CSI RS) resource, and a Demodulation Reference Signal (DM).
  • CSI RS Channel State Information Reference Signal
  • DM Demodulation Reference Signal
  • RS One or more of resource and Cell-specific Reference Signal (CRS) resources.
  • the CSI RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of a CSI RS in a Resource Block (RB), for example, a port number occupying different subcarriers or symbols or sequences;
  • the subframe configuration may be a subframe in which a CSI RS is transmitted. Period or offset.
  • the DM RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the DM RS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the DM RS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the transmission point.
  • the CRS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the CRS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the CRS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the transmission point.
  • the sending unit 61 may specifically pass High-level signaling (that is, the Physical Downlink Shared Channel,
  • the PDSCH is carried by the higher layer signaling or the downlink control information (that is, the downlink control information is carried by the Physical Downlink Control Channel (PDCCH) or the enhanced PDCCH (ePDCCH)) to the terminal. And sending the at least two reference signal resource configuration information, so that the terminal obtains the at least two reference signal resources according to the at least two reference signal resource configuration information.
  • the downlink control information is carried by the Physical Downlink Control Channel (PDCCH) or the enhanced PDCCH (ePDCCH)
  • ePDCCH enhanced PDCCH
  • the high-level signaling may be a Radio Resource Control (RRC) message, and may specifically pass an information element (Information Element, in an RRC message).
  • RRC Radio Resource Control
  • the IE carries the at least two reference signal resource configuration information, and the RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, etc., which is not limited in this embodiment.
  • the IE of the RRC message is extended to carry the at least two reference signal resource configuration information, or the RRC message may be different from the existing RRC message in the prior art.
  • the high-level signaling may also be a Media Access Control (MAC) Control Element (CE) message, and the at least two reference signal resource configuration information is carried by adding a new MAC CE.
  • MAC Media Access Control
  • CE Control Element
  • the reference signal may include, but is not limited to, a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the terminal may specifically receive, by using the at least two reference signal resources, a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the subset of the reference signals may be an indication that the transmission point is sent by using the high layer signaling or the downlink control information, and is used to indicate that a part of the reference signals are selected from the set of reference signals corresponding to the reference signal resources.
  • a subset of the reference signals for example, selecting a first reference signal from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a second reference signal as a sub- set.
  • the high-layer signaling may be an RRC message, and the RRC message may be an RRC message in the RRC message, for example, an RRC connection reconfiguration (RRC CONNECTION RECONFIGURATION).
  • RRC CONNECTION RECONFIGURATION RRC CONNECTION RECONFIGURATION
  • the message and the like are not limited in this embodiment.
  • the IE message may be extended by the IE of the existing RRC message, or the RRC message may be different from the RRC message existing in the prior art.
  • the high layer signaling may also be a MAC CE message, and the indication is carried by adding a new MAC CE.
  • the subset of the reference signals may be predefined, for example, pre-defining a first reference signal selected from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a first reference signal Two reference signals are used as a subset of the reference signals.
  • the first indication information may be specifically sent by the sending unit 61 to the terminal by using high layer signaling or downlink control information.
  • the transmission point may specifically select the first precoding matrix from a pre-defined precoding matrix set or a codebook.
  • the high layer signaling may be an RRC message
  • the first indication information may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC The CONNECTION RECONFIGURATION message, etc., is not limited in this embodiment, and the first indication information is carried by extending the IE of the existing RRC message, or the RRC message may be different from the prior art. RRC message.
  • the high-level signaling may also be a MAC CE message, and the first indication information is carried by adding a new MAC CE.
  • the index value may be a Rank Indicator (R1) and a Precoding Matrix Indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • R1 Rank Indicator
  • PMI Precoding Matrix Indicator
  • the first precoding matrix may be a precoding matrix indicated by the first indication information, or may be part of a precoding matrix indicated by the first indication information, for example, A matrix consisting of rows or columns of precoding matrices.
  • the first precoding matrix may be a precoding matrix that improves a beam tilt angle corresponding to the reference signal, so that the signal quality of the terminal may be increased; or may be a precoding that reduces a beam tilt angle corresponding to the reference signal.
  • the matrix can reduce the signal quality of the terminal. Therefore, the transmission point currently accessed by the terminal can be adjusted according to the terminal to be adjusted, in particular, the terminal at the edge of the coverage point of the transmission point and the transmission point and other transmission points.
  • the reference signal resources corresponding to the transmission point and the second transmission point may be precoded by using the corresponding first precoding matrix respectively, so that the terminal can obtain the reference signal more accurately.
  • the reference signal resource corresponding to the second transmission point may also be a reference signal resource that is not pre-coded by the first precoding matrix, thereby reducing signaling overhead.
  • the quality information of the reference signal received by the receiving unit 62 may include, but is not limited to, a reference signal received power (RSRP), a reference signal.
  • RSRP reference signal received power
  • RSSI Reference Signal Received Quality
  • RSI Reference Signal Strength Indicator
  • CQI Channel Quality Indicator
  • the receiving unit 62 may specifically receive, by using, the high-level signaling, a physical uplink control channel (PUCCH), or a physical uplink shared channel ( Physical Uplink Shared Channel, PUCCH), the quality information of the reference signal transmitted.
  • a physical uplink control channel PUCCH
  • PUCCH Physical Uplink Shared Channel
  • the high-layer signaling may be an RRC message
  • the quality information of the reference signal may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, the RRC connection reconfiguration is completed.
  • the RRC CONNECTION RECONFIGURATION COMPLETE message, etc. is not limited in this embodiment.
  • the IE of the existing RRC message is extended to carry the quality information of the reference signal, or the RRC message may be different from the existing one. RRC messages already in the technology.
  • the high layer signaling may also be a MAC CE message, and the quality information of the reference signal is carried by adding a new MAC CE.
  • the quality information of the reference signal after the precoding of the channel corresponding to each transmission point is obtained by the terminal according to the reference signal sent by the first precoding matrix and the transmission point and the second transmission point, thereby Enabling the terminal to obtain the quality information of the pre-coded reference signal more accurately, so that the processing unit switches the terminal to a suitable second transmission point to implement shunting between the transmission points, thereby improving the terminal. Access reliability.
  • the sending unit 61 may be further configured to send, after the terminal accesses the one second transmission point, to the one second transmission point. a third indication information, where the third indication information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is used by the transmission point to match the first channel, so that
  • the second indication information is used to indicate a second precoding matrix or a subset of the second precoding matrix that matches the first channel used by the transmission point;
  • the second transmission point sends the second indication information to the terminal, so that the terminal sends fourth indication information to the one second transmission point according to the second indication information, where the fourth The indication information is used to indicate that the third precoding matrix or the subset of the third precoding matrix that matches the second channel is different from the second precoding matrix indicated by the second indication information or the first Determining, by the second transmission point, an appropriate precoding matrix according to the fourth indication information, where the transmission point interferes with the one second transmission point, where the first channel is the terminal and the transmission point
  • the channel between the second channel is a channel between the terminal and the one second transmission point.
  • the second transmission point may be configured to determine second indication information according to the third indication information, where the second indication information is used to indicate a second pre-match with the first channel used by the transmission point. a coding matrix or a subset of the second precoding matrix; and the one second transmission point transmitting the second indication information to the terminal, such that the terminal according to the second indication information And transmitting, by the second transmission point, the fourth indication information, where the fourth indication information is used to indicate that the third precoding matrix or the subset of the third precoding matrix that matches the second channel is in addition to the second indication information Deriving a second precoding matrix or a subset of the other precoding matrices other than the subset of the second precoding matrix or the other precoding matrices such that the one second transmission point is according to the a fourth indication information, selecting a suitable precoding matrix, and precoding the downlink data of the terminal by using the selected precoding matrix to reduce the transmission point to the one Interfering two transmission points, the first channel is a channel between the terminal and
  • the second precoding matrix indicated by the second indication information may include, but is not limited to, a precoding matrix that is forbidden to use, a precoding matrix that has been used, or a precoding matrix used for interference.
  • the second indication information may be an index value of the second precoding matrix; and the fourth indication information may be an index value of the other precoding matrix.
  • the index value may be a rank indicator (R1) and a precoding matrix indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • the second precoding matrix may include, but is not limited to, the transmission point in each physical resource block (Physical Resource Block,
  • the third precoding matrix may include, but is not limited to, the second transmission point in each physical resource block (PRB), subband or A precoding matrix on the system bandwidth.
  • PRB physical resource block
  • the sending unit 61 is specifically configured to send the third indication information to the one second transmission point by using an X2 interface.
  • the sending unit 61 may further send the third indication information to the one second transmission point by using another signaling or a backhaul manner.
  • the embodiment does not limit this.
  • the other precoding matrix indicated by the fourth indication information or the subset of the other precoding matrices is a third precoding that matches the second channel.
  • a matrix or a subset of the matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information in a subset of the matrix or the third precoding matrix .
  • the other precoding matrix or the subset of the other precoding matrices may be in a subset of the third precoding matrix or the third precoding matrix that matches the second channel, and the second pre A subset of the coding matrix or the subset of the second precoding matrix that is orthogonal or quasi-orthogonal or a subset of the precoding matrix.
  • the transmission point sends the third indication information to the one second transmission point by using the sending unit, where the third indication information is used to indicate the second precoding matrix that is used by the transmission point to match the first channel.
  • the subset of the second precoding matrix, and the one second transmission point determines the second indication information according to the third indication information, and sends the second indication information to the terminal, where the second indication information is used to indicate the location Determining, by the transmission point, a second precoding matrix matching the first channel or a subset of the second precoding matrix, thereby enabling the terminal to use the second preamble matching the first channel according to the transmission point
  • the coding matrix or the subset of the second precoding matrix more accurately feeding back the available precoding matrix to the second transmission point, can effectively avoid the second precoding matrix pair used by the transmission point to match the first channel
  • the interference caused by the terminal further improves the throughput of the terminal and the second transmission point.
  • FIG. 7 is a schematic structural diagram of a terminal according to another embodiment of the present application, as shown in FIG. 7.
  • the terminal of the embodiment may include a receiver 71, a processor 72, and a transmitter 73.
  • the receiver 71 is configured to obtain at least two reference signal resources, where the at least two reference signal resources respectively correspond to different transmitters, where the transmission unit includes a first transmission point and at least one second transmission point, where The first transmission point is a transmission point currently accessed by the terminal; the receiver 71 is further configured to receive the reference signal by using the at least two reference signal resources, and transmit the reference signal to the processor 72;
  • the processor 72 is configured to obtain quality information of the reference signal according to the first precoding matrix and the reference signal, and transmit quality information of the reference signal to the transmitter 73; the transmitter 73, And transmitting, to the first transmission point, quality information of the reference signal, so that the first transmission point indicates that the terminal accesses a second transmission point.
  • the first transmission point and the at least one second transmission point may have the same cell identity, or may also have different cell identifiers. That is, the at least two reference signal resources may be reference signal resources corresponding to a plurality of transmission points in one cell, or may be reference signal resources respectively corresponding to transmission points in different cells.
  • the reference signal resource obtained by the receiver 71 may include a Channel State Information Reference Signal (CSI RS) resource, a demodulation reference.
  • CSI RS Channel State Information Reference Signal
  • DM RS DeModulation Reference Signal
  • CRS Cell-specific Reference Signal
  • the CSI RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of a CSI RS in a Resource Block (RB), for example, a port number occupying different subcarriers or symbols or sequences;
  • the subframe configuration may be a subframe in which a CSI RS is transmitted. Period or offset.
  • the DM RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the DM RS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the DM RS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the CRS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the CRS in one RB, for example, Different port numbers; the subframe configuration may be the period or offset of the subframe in which the CRS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the first transmission point.
  • the receiver 71 may obtain that the first transmission point is carried by high layer signaling (that is, by a Physical Downlink Shared Channel (PDSCH).
  • the high-level signaling or downlink control information that is, the downlink control information is carried by a Physical Downlink Control Channel (PDCCH) or an enhanced PDCCH (ePDCCH)
  • the signal resource configuration information is obtained according to the at least two reference signal resource configuration information, and the at least two reference signal resources are obtained.
  • the high layer signaling may be radio resource control (Radio Resource Control,
  • RRC RRC message, which can specifically pass the information element in the RRC message (Information Element,
  • RRC message carrying the at least two reference signal resource configuration information
  • the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC CONNECTION)
  • the RECONFIGURATION message and the like are not limited in this embodiment.
  • the IE message of the existing RRC message is extended to carry the at least two reference signal resource configuration information, or the RRC message may be different from the prior art.
  • the existing RRC message is extended to carry the at least two reference signal resource configuration information, or the RRC message may be different from the prior art.
  • the high layer signaling may also be media access control (Media Access Control,
  • the MAC (Control Element, CE) message carries the at least two reference signal resource configuration information by adding a new MAC CE.
  • the receiver 71 is specifically configured to receive, by using the at least two reference signal resources, a set of reference signals corresponding to the at least two reference signal resources. Or a subset of the reference signals.
  • the subset of the reference signal may be an indication that the first transmission point is sent by using the high layer signaling or the downlink control information, to indicate that a part of the reference signal is selected from the set of reference signals corresponding to the reference signal resource.
  • a subset of the reference signal for example, selecting a first reference signal from a set of reference signals corresponding to the reference signal resource, or using a first reference signal and a second reference signal as the reference signal a subset of.
  • the high-layer signaling may be an RRC message
  • the RRC message may be an RRC message in the RRC message, for example, an RRC connection reconfiguration (RRC CONNECTION RECONFIGURATION).
  • RRC CONNECTION RECONFIGURATION RRC CONNECTION RECONFIGURATION
  • IE message is extended by the IE of the existing RRC message, or the RRC message may be different from the existing RRC message in the prior art.
  • the high layer signaling may also be a MAC CE message, and the indication is carried by adding a new MAC CE.
  • the subset of the reference signals may be predefined, for example, pre-defining a first reference signal selected from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a first reference signal Two reference signals are used as a subset of the reference signals.
  • the receiver 71 may be further configured to receive first indication information that is sent by the first transmission point (for example, the first precoding moment Index value), the first indication information is used to indicate the first precoding matrix.
  • the first indication information may be that the first transmission point is sent to the terminal by using high layer signaling or downlink control information.
  • the first transmission point may specifically select the first precoding matrix from a preset precoding matrix set or a codebook.
  • the high layer signaling may be an RRC message
  • the first indication information may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC The CONNECTION RECONFIGURATION message, etc., is not limited in this embodiment, and the first indication information is carried by extending the IE of the existing RRC message, or the RRC message may be different from the prior art. RRC message.
  • the high-level signaling may also be a MAC CE message, and the first indication information is carried by adding a new MAC CE.
  • the index value may be a Rank Indicator (R1) and a Precoding Matrix Indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • R1 Rank Indicator
  • PMI Precoding Matrix Indicator
  • the first precoding matrix may be a precoding matrix indicated by the first indication information, or may be part of a precoding matrix indicated by the first indication information, for example, A matrix consisting of rows or columns of precoding matrices.
  • the receiver 71 may be further configured to obtain the first indication information according to a pre-configuration, for example, a protocol contract from a predefined precoding matrix set. Or selecting the first precoding matrix in the codebook.
  • the first precoding matrix may be a precoding matrix that improves a beam tilt angle corresponding to the reference signal, so that the signal quality of the terminal may be increased; or may be a precoding that reduces a beam tilt angle corresponding to the reference signal.
  • the matrix can reduce the signal quality of the terminal. Therefore, the transmission point currently accessed by the terminal may be adjusted according to the terminal to be adjusted, in particular, the terminal at the edge of the coverage point of the transmission point and the transmission point and other transmission points.
  • the reference signal resources corresponding to the first transmission point and the second transmission point may be precoded by using the corresponding first precoding matrix, respectively, so that the terminal can obtain a reference more accurately.
  • the channel quality information after the signal is beam-adjusted; the reference signal resource corresponding to the first transmission point and the second transmission point may also be a reference signal resource that is not pre-coded by the first pre-coding matrix, thereby being capable of Reduce signaling overhead.
  • the quality information of the reference signal obtained by the processor 72 may include, but is not limited to, a reference signal received power (RSRP), a reference signal.
  • RSRP reference signal received power
  • Receiver Quality Reference Signal Received
  • RSRQ Reference Signal Strength Indicator
  • CQI Channel Quality Indicator
  • the transmitter 73 may be configured by using a high-level signaling, a physical uplink control channel (PUCCH), or a physical uplink shared channel (Physical Uplink Shared Channel). , PUCCH), transmitting quality information of the reference signal to the first transmission point.
  • PUCCH Physical Uplink Control Channel
  • PUCCH Physical Uplink Shared Channel
  • the high-layer signaling may be an RRC message
  • the quality information of the reference signal may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, the RRC connection reconfiguration is completed.
  • the RRC CONNECTION RECONFIGURATION COMPLETE message, etc. is not limited in this embodiment.
  • the IE of the existing RRC message is extended to carry the quality information of the reference signal, or the RRC message may be different from the existing one. RRC messages already in the technology.
  • the high layer signaling may also be a MAC CE message, and the quality information of the reference signal is carried by adding a new MAC CE.
  • the terminal obtains, by the processor, the reference signal after the precoding of the channel corresponding to each transmission point according to the reference signal sent by the first precoding matrix and the first transmission point and the second transmission point.
  • Quality information thereby enabling the terminal to obtain pre-coded more accurately
  • the quality information of the reference signal so that the first transmission point switches the terminal to a suitable second transmission point, and the shunting between the transmission points is realized, thereby improving the access reliability of the terminal.
  • the receiver 71 may be further configured to: after the terminal accesses the one second transmission point, receive the second transmission point. Transmitting the second indication information, and transmitting the second indication information to the transmitter 73, where the second indication information is used to indicate a second precoding that is matched by the first transmission point and matched with the first channel.
  • the transmitter 73 may further be used according to the The second indication information is sent to the one second transmission point, where the fourth indication information is used to indicate a third precoding matrix or the third precoding matrix that matches the second channel.
  • the precoding matrix precodes downlink data of the terminal to reduce interference of the first transmission point to the one second transmission point, where the first channel is the terminal and the first transmission A channel between the points, the second channel being a channel between the terminal and the one second transmission point.
  • the second precoding matrix indicated by the second indication information may include, but is not limited to, a precoding matrix that is forbidden to use, a precoding matrix that has been used, or a precoding matrix used for interference.
  • the second indication information may be an index value of the second precoding matrix; and the fourth indication information may be an index value of the other precoding matrix.
  • the index value may be a rank indicator (R1) and a precoding matrix indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • the second precoding matrix may include, but is not limited to, the first transmission point in each physical resource block (PRB), subband or A precoding matrix on the system bandwidth.
  • PRB physical resource block
  • the third precoding matrix may include, but is not limited to, the second transmission point in each physical resource block (Physical Resource Block, PRB), subband or precoding matrix over the system bandwidth.
  • PRB Physical Resource Block
  • the first transmission point may send the third indication information to the second transmission point by using another signaling or a backhaul mode, which is not limited in this embodiment.
  • the other precoding matrix indicated by the fourth indication information or the subset of the other precoding matrices is a third precoding that matches the second channel.
  • a matrix or a subset of the matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information in a subset of the matrix or the third precoding matrix .
  • the other precoding matrix or the subset of the other precoding matrices may be in a subset of the third precoding matrix or the third precoding matrix that matches the second channel, and the second pre A subset of the coding matrix or the subset of the second precoding matrix that is orthogonal or quasi-orthogonal or a subset of the precoding matrix.
  • the terminal receives, by the receiver, the second indication information that is sent by the second transmission point that is sent by the terminal, where the second indication information is used to indicate that the first transmission point is used by the first a second precoding matrix of the channel matching or a subset of the second precoding matrix, where the second indication information is determined by the one second transmission point according to the received third indication information sent by the first transmission point
  • the third indication information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is matched by the first transmission point and used by the first transmission point, so that the transmitter can be configured according to the a second precoding matrix matched by the first channel or a subset of the second precoding matrix used by a transmission point to more accurately feed back the available precoding matrix to the second transmission point, which can effectively avoid the first transmission point
  • the interference caused by the second precoding matrix matched with the first channel to the terminal further improves the throughput of the terminal and the second transmission point.
  • FIG. 8 is a schematic structural diagram of a transmission point according to another embodiment of the present application, as shown in FIG. 8.
  • the transmission point of this embodiment may include a transmitter 81, a receiver 82, and a processor 83.
  • the transmitter 81 is configured to send, to the terminal, the first indication information, where the first indication information is used to indicate a first precoding matrix, where the first precoding matrix is used to adjust a quality of the reference signal received by the terminal.
  • the reference signal is that the terminal receives according to at least two reference signal resources, where the at least two reference signal resources respectively correspond to different transmitters, where the transmitter includes the transmission point and at least one second transmission point.
  • the transmission point is a transmission point currently accessed by the terminal; the receiver 82 is configured to receive quality information of the reference signal sent by the terminal, and transmit quality information of the reference signal to the processor 83, The quality information of the reference signal is the reference signal and the location of the terminal according to the reference signal The first precoding matrix indicated by the first indication information is obtained; the processor 83 is configured to instruct the terminal to access a second transmission point according to the quality information of the reference signal.
  • the transmission point and the at least one second transmission point may have the same cell identity, or may also have different cell identifiers. That is, the at least two reference signal resources may be reference signal resources respectively corresponding to multiple transmission points in one cell, or may be reference signal resources corresponding to transmission points in different cells respectively.
  • the reference signal resource may include a Channel State Information Reference Signal (CSI RS) resource, and a DeModulation Reference Signal (DM).
  • CSI RS Channel State Information Reference Signal
  • DM DeModulation Reference Signal
  • RS One or more of resource and Cell-specific Reference Signal (CRS) resources.
  • the CSI RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of a CSI RS in a Resource Block (RB), for example, a port number occupying different subcarriers or symbols or sequences;
  • the subframe configuration may be a subframe in which a CSI RS is transmitted. Period or offset.
  • the DM RS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the DM RS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the DM RS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the transmission point.
  • the CRS resource may be a resource configuration, or may also be a combination of resource configuration and subframe configuration.
  • the resource configuration may be a resource configuration of the CRS in one RB, for example, a different port number; the subframe configuration may be a period or an offset of a subframe in which the CRS is transmitted.
  • the subframe configuration may be predefined, and is known to both the terminal and the transmission point.
  • the transmitter 81 may specifically perform high-level signaling (that is, the high-level signaling is carried by a Physical Downlink Shared Channel (PDSCH)) or downlink control.
  • the information that is, the downlink control information is carried by the Physical Downlink Control Channel (PDCCH) or the enhanced PDCCH (ePDCCH)), and is sent to the terminal.
  • PDSCH Physical Downlink Shared Channel
  • ePDCCH enhanced PDCCH
  • the high-level signaling may be a radio resource control (RRC) message
  • the at least two reference signal resource configuration information may be carried by using an information element (IE) in the RRC message
  • IE information element
  • the RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, etc., which is not limited in this embodiment.
  • the IE of the RRC message is extended to carry the at least two reference signal resource configuration information, or the RRC message may be different from the existing RRC message in the prior art.
  • the high-level signaling may also be a Media Access Control (MAC) Control Element (CE) message, and the at least two reference signal resource configuration information is carried by adding a new MAC CE.
  • MAC Media Access Control
  • CE Control Element
  • the reference signal may include, but is not limited to, a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the terminal may specifically receive, by using the at least two reference signal resources, a set of reference signals corresponding to the at least two reference signal resources or a subset of the reference signals.
  • the subset of the reference signals may be an indication that the transmission point is sent by using the high layer signaling or the downlink control information, and is used to indicate that a part of the reference signals are selected from the set of reference signals corresponding to the reference signal resources.
  • a subset of the reference signals for example, selecting a first reference signal from a set of reference signals corresponding to the reference signal resource, or a first reference signal and a second reference signal as a sub- set.
  • the high-layer signaling may be an RRC message
  • the RRC message may be an RRC message in the RRC message, for example, an RRC connection reconfiguration (RRC CONNECTION RECONFIGURATION).
  • RRC CONNECTION RECONFIGURATION RRC CONNECTION RECONFIGURATION
  • the message and the like are not limited in this embodiment.
  • the IE message may be extended by the IE of the existing RRC message, or the RRC message may be different from the RRC message existing in the prior art.
  • the high layer signaling may also be a MAC CE message, and the indication is carried by adding a new MAC CE.
  • the subset of the reference signals may be predefined, for example, pre-defining a first reference signal selected from a set of reference signals corresponding to the reference signal resource, or The first reference signal and the second reference signal are used as a subset of the reference signal.
  • the first indication information may be specifically sent by the sender 81 to the terminal by using high layer signaling or downlink control information.
  • the transmission point may specifically select the first precoding matrix from a preset precoding matrix set or a codebook.
  • the high layer signaling may be an RRC message
  • the first indication information may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, RRC connection reconfiguration (RRC The CONNECTION RECONFIGURATION message, etc., is not limited in this embodiment, and the first indication information is carried by extending the IE of the existing RRC message, or the RRC message may be different from the prior art. RRC message.
  • the high-level signaling may also be a MAC CE message, and the first indication information is carried by adding a new MAC CE.
  • the index value may be a Rank Indicator (R1) and a Precoding Matrix Indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • R1 Rank Indicator
  • PMI Precoding Matrix Indicator
  • the first precoding matrix may be a precoding matrix indicated by the first indication information, or may be part of a precoding matrix indicated by the first indication information, for example, A matrix consisting of rows or columns of precoding matrices.
  • the first precoding matrix may be a precoding matrix that improves a beam tilt angle corresponding to the reference signal, so that the signal quality of the terminal may be increased; or may be a precoding that reduces a beam tilt angle corresponding to the reference signal.
  • the matrix can reduce the signal quality of the terminal. Therefore, the transmission point currently accessed by the terminal can be adjusted according to the terminal to be adjusted, in particular, the terminal at the edge of the coverage point of the transmission point and the transmission point and other transmission points.
  • reference signal resources corresponding to the transmission point and the second transmission point may be precoded by using the corresponding first precoding matrix respectively, so that the terminal can obtain the reference signal more accurately.
  • Channel quality information after beam adjustment; reference signal resources corresponding to the transmission point and the second transmission point may also be reference signal resources that are not precoded by the first precoding matrix, thereby reducing signaling overhead .
  • the quality information of the reference signal received by the receiver 82 may include, but is not limited to, a reference signal received power (Reference Signal One or more of Received Power (RSRP), Reference Signal Received Quality (RSRQ), Reference Signal Strength Indicator (RSI), and Channel Quality Indicator (CQI).
  • RSRP Reference Signal One or more of Received Power
  • RSRQ Reference Signal Received Quality
  • RSI Reference Signal Strength Indicator
  • CQI Channel Quality Indicator
  • the receiver 82 may receive the uplink signaling, the Physical Uplink Control Channel (PUCCH), or the physical uplink shared channel (the physical uplink control channel). Physical Uplink Shared Channel, PUCCH), the quality information of the reference signal transmitted.
  • PUCCH Physical Uplink Shared Channel
  • the high-layer signaling may be an RRC message
  • the quality information of the reference signal may be carried by the IE in the RRC message
  • the RRC message may be an RRC message in the prior art, for example, the RRC connection reconfiguration is completed.
  • the RRC CONNECTION RECONFIGURATION COMPLETE message, etc. is not limited in this embodiment.
  • the IE of the existing RRC message is extended to carry the quality information of the reference signal, or the RRC message may be different from the existing one. RRC messages already in the technology.
  • the high layer signaling may also be a MAC CE message, and the quality information of the reference signal is carried by adding a new MAC CE.
  • the quality information of the reference signal after the precoding of the channel corresponding to each transmission point is obtained by the terminal according to the reference signal sent by the first precoding matrix and the transmission point and the second transmission point, thereby
  • the terminal is enabled to obtain the quality information of the pre-coded reference signal more accurately, so that the processor switches the terminal to a suitable second transmission point to implement shunting between the transmission points, thereby improving the terminal. Access reliability.
  • the transmitter 81 may be further configured to send, after the terminal accesses the one second transmission point, to the one second transmission point. a third indication information, where the third indication information is used to indicate a second precoding matrix or a subset of the second precoding matrix that is used by the transmission point to match the first channel, so that
  • the second transmission point Determining, by the second transmission point, the second indication information according to the third indication information, where the second indication information is used to indicate a second precoding matrix that matches the first channel used by the transmission point or the a subset of the second precoding matrix;
  • the second transmission point sends the second indication information to the terminal, so that the terminal sends fourth indication information to the one second transmission point according to the second indication information, where the fourth The indication information is used to indicate a third precoding matrix or the third precoding that matches the second channel Selecting a suitable precoding matrix according to the fourth indication information indicated by the second indication information or the first transmission point according to the fourth indication information, in a subset of the matrix,
  • the interference of the transmission point to the one second transmission point, the first channel is a channel between the terminal and the transmission point
  • the second channel is the terminal and the second transmission point The channel between.
  • the second transmission point may be configured to determine second indication information according to the third indication information, where the second indication information is used to indicate a second pre-match with the first channel used by the transmission point. a coding matrix or a subset of the second precoding matrix; and the one second transmission point transmitting the second indication information to the terminal, such that the terminal according to the second indication information And transmitting, by the second transmission point, the fourth indication information, where the fourth indication information is used to indicate that the third precoding matrix or the subset of the third precoding matrix that matches the second channel is in addition to the second indication information Deriving a second precoding matrix or a subset of the other precoding matrices other than the subset of the second precoding matrix or the other precoding matrices such that the one second transmission point is according to the a fourth indication information, selecting a suitable precoding matrix, and precoding the downlink data of the terminal by using the selected precoding matrix to reduce the transmission point to the one Interfering two transmission points, the first channel is a channel between the terminal and
  • the second precoding matrix indicated by the second indication information may include, but is not limited to, a precoding matrix that is forbidden to use, a precoding matrix that has been used, or a precoding matrix used for interference.
  • the second indication information may be an index value of the second precoding matrix; and the fourth indication information may be an index value of the other precoding matrix.
  • the index value may be a rank indicator (R1) and a precoding matrix indicator (PMI), or may be a PMI, which is not limited in this embodiment.
  • the second precoding matrix may include, but is not limited to, the physical resource block (PRB), subband or system bandwidth of the transmission point. Precoding matrix on.
  • PRB physical resource block
  • the third precoding matrix may include, but is not limited to, the second transmission point in each physical resource block (Physical Resource Block, PRB), subband or precoding matrix over the system bandwidth.
  • PRB Physical Resource Block
  • the transmitter 81 is specifically configured to send the third indication information to the one second transmission point by using an X2 interface.
  • the transmitter 81 may further send the third indication information to the one second transmission point by using another signaling or a backhaul manner.
  • the embodiment does not limit this.
  • the other precoding matrix indicated by the fourth indication information or the subset of the other precoding matrices is a third precoding that matches the second channel.
  • a matrix or a subset of the matrix other than the subset of the second precoding matrix or the second precoding matrix indicated by the second indication information in a subset of the matrix or the third precoding matrix .
  • the other precoding matrix or the subset of the other precoding matrices may be in a subset of the third precoding matrix or the third precoding matrix that matches the second channel, and the second pre A subset of the coding matrix or the subset of the second precoding matrix that is orthogonal or quasi-orthogonal or a subset of the precoding matrix.
  • the transmission point sends the third indication information to the one second transmission point by using the transmitter, where the third indication information is used to indicate the second precoding matrix that is used by the transmission point to match the first channel.
  • the subset of the second precoding matrix, and the one second transmission point determines the second indication information according to the third indication information, and sends the second indication information to the terminal, where the second indication information is used to indicate the location Determining, by the transmission point, a second precoding matrix matching the first channel or a subset of the second precoding matrix, thereby enabling the terminal to use the second preamble matching the first channel according to the transmission point
  • the coding matrix or the subset of the second precoding matrix more accurately feeding back the available precoding matrix to the second transmission point, can effectively avoid the second precoding matrix pair used by the transmission point to match the first channel
  • the interference caused by the terminal further improves the throughput of the terminal and the second transmission point.
  • the disclosed system, apparatus, and method 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, and may be implemented in actual implementation.
  • multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute the method of the various embodiments of the present application. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a random access memory (RAM), a disk or an optical disk, and the like, which can store program codes. .

Abstract

本申请实施例提供接入方法及设备。本申请实施例通过终端根据第一预编码矩阵和第一传输点和所述第二传输点发送的参考信号,获得每个传输点对应的信道经过预编码之后的所述参考信号的质量信息,从而使得所述终端能够更精确地获得经过预编码的参考信号的质量信息,以便所述第一传输点将所述终端切换到一个合适的第二传输点,实现各个传输点之间的分流,从而提高了终端的接入可靠性。

Description

接入方法及设备
技术领域
本申请涉及通信技术, 尤其涉及一种接入方法及设备。 背景技术
在无线通信系统例如, 异构网网络部署场景中, 一个小区标识可以对应 一个传输点 (Transmission Point, TP ) , 或者一个小区标识还可以对应多 个 TP, 每个 TP通常具有不同的参考信号 (Reference Signal, RS ) 资源, 可以用不同的索引进行区分, 例如, 虚拟标识等。 其中, 所述 TP可以包括 接入点(Access Point, AP )、宏基站和低功率节点,例如,微基站( Micro )、 微微基站(Pico ) 、 远端射频头 (Remote Radio Head, RRH ) 、 中继设备 ( Relay )和毫微微基站 ( Femto )。 每个 TP都需要将指示该 TP对应的 RS 资源的 RS配置信息发送给终端, 使得终端能够利用 RS配置信息接收 RS, 从而利用该 RS对所述终端到对应的 TP之间的信道进行测量。终端当前接入 的 TP接收终端上报的测量结果,利用小区范围扩展( Cell Range Expansion, CRE )引入小区切换的偏移量, 从而使得终端接入到其他 TP, 以实现 TP的 负载分流, 能够提高无线通信系统的吞吐量。
然而,现有的接入方法可能会致使终端接入到不合适的 TP(例如, RRH ), 即所述终端与其他 TP (例如, 异构网网络部署场景中的宏基站)之间的信道 会对所述终端与该 TP之间的信道造成较强干扰, 使得终端无法正常通过该 TP进行通信业务, 从而导致终端的接入可靠性的降低。 发明内容
本申请的多个方面提供一种接入方法及设备, 用以提高终端的接入可靠 性。
本申请的一方面, 提供一种接入方法, 包括:
终端获得至少两个参考信号资源, 所述至少两个参考信号资源分别对应 第一传输点和至少一个第二传输点, 所述第一传输点为所述终端当前接入的 传输点;
所述终端利用所述至少两个参考信号资源, 接收参考信号;
所述终端根据第一预编码矩阵和所述参考信号, 获得所述参考信号的质 量信息;
所述终端向所述第一传输点发送所述参考信号的质量信息, 以使得所述 第一传输点指示所述终端接入一个第二传输点。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多 个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述终端利用所述至少两个参考信号资源, 接收参考信号, 包括:
所述终端利用所述至少两个参考信号资源, 接收所述至少两个参考信号 资源对应的参考信号的集合或所述参考信号的子集。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述终端根据第一预编码矩阵和所述参考信号, 获得所述参考信号的质量信息 之前, 还包括:
所述终端接收所述第一传输点发送的第一指示信息, 所述第一指示信息 用于指示所述第一预编码矩阵。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述终端接入一个第二传输点之后, 还包括:
所述终端接收所述一个第二传输点发送的第二指示信息, 所述第二指示 信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所 述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点根据接 收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用于指示 所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预编码 矩阵的子集;
所述终端根据所述第二指示信息, 向所述一个第二传输点发送第四指示 信息, 所述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述 第三预编码矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩 阵或所述第二预编码矩阵的子集之外的其他预编码矩阵或所述其他预编码矩 阵的子集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合适的 预编码矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行预编 码, 以降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信道为 所述终端与所述第一传输点之间的信道, 所述第二信道为所述终端与所述一 个第二传输点之间的信道。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述方法还包括:
所述第一传输点通过 X2接口, 向所述一个第二传输点发送所述第三指 示信息。
本申请的另一方面, 提供一种接入方法, 包括:
第一传输点向终端发送第一指示信息, 所述第一指示信息用于指示第一 预编码矩阵,所述第一预编码矩阵用于调整所述终端接收的参考信号的质量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少两个参 考信号资源分别对应不同的传输单元, 所述传输单元包括所述第一传输点和 至少一个第二传输点, 所述第一传输点为所述终端当前接入的传输点;
所述第一传输点接收所述终端发送的所述参考信号的质量信息, 所述参 考信号的质量信息为所述终端根据所述参考信号和所述第一指示信息所指示 的第一预编码矩阵获得;
所述第一传输点根据所述参考信号的质量信息, 指示所述终端接入一个 第二传输点。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多 个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号包括所述至少两个参考信号资源对应的参考信号的集合或所述参 考信号的子集。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI中的一个或多个。 如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述终端接入一个第二传输点之后, 还包括:
所述第一传输点向所述一个第二传输点发送第三指示信息, 所述第三指 示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或 所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码 矩阵或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行预编码, 以降低所 述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所 述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点 之间的信道。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述第一传输点向所述一个第二传输点发送第三指示信息, 包括:
所述第一传输点通过 X2接口, 向所述一个第二传输点发送所述第三指 示信息。
本申请的另一方面, 提供一种终端, 包括:
接收单元, 用于获得至少两个参考信号资源, 所述至少两个参考信号资 源分别对应第一传输点和至少一个第二传输点, 所述第一传输点为所述终端 当前接入的传输点;
所述接收单元, 还用于利用所述至少两个参考信号资源,接收参考信号, 以及将所述参考信号传输给处理单元;
所述处理单元, 用于根据第一预编码矩阵和所述参考信号, 获得所述参 考信号的质量信息, 以及将所述参考信号的质量信息传输给发送单元; 所述发送单元, 用于向所述第一传输点发送所述参考信号的质量信息, 以使得所述第一传输点指示所述终端接入一个第二传输点。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收单元获得的所述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS 资源中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收单元具体用于
利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应 的参考信号的集合或所述参考信号的子集。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收单元, 还用于
接收所述第一传输点发送的第一指示信息, 所述第一指示信息用于指示 所述第一预编码矩阵。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述处理单元获得的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI 和 CQI中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所述接收单元, 还用于
在所述终端接入所述一个第二传输点之后, 接收所述一个第二传输点发 送的第二指示信息, 以及将所述第二指示信息传输给所述发送单元, 所述第 二指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩 阵或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点 根据接收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用 于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二 预编码矩阵的子集;
所述发送单元, 还用于
根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所 述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编 码矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述 集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合适的预编码 降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终 端与所述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二 传输点之间的信道。
本申请的另一方面, 提供一种传输点, 包括:
发送单元, 用于向终端发送第一指示信息, 所述第一指示信息用于指示 第一预编码矩阵, 所述第一预编码矩阵用于调整所述终端接收的参考信号的 质量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少 两个参考信号资源分别对应不同的传输单元, 所述传输单元包括所述传输点 和至少一个第二传输点, 所述传输点为所述终端当前接入的传输点;
接收单元, 用于接收所述终端发送的所述参考信号的质量信息, 以及将 所述参考信号的质量信息传输给处理单元, 所述参考信号的质量信息为所述 终端根据所述参考信号和所述第一指示信息所指示的第一预编码矩阵获得; 所述处理单元, 用于根据所述参考信号的质量信息, 指示所述终端接入 一个第二传输点。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多 个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号包括所述至少两个参考信号资源对应的参考信号的集合或所述参 考信号的子集。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收单元接收的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI 和 CQI中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述发送单元还用于
在所述终端接入所述一个第二传输点之后, 向所述一个第二传输点发送 第三指示信息, 所述第三指示信息用于指示所述传输点使用的与第一信道匹 配的第二预编码矩阵或所述第二预编码矩阵的子集, 以使得 所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行预编码, 以降低所 述传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述传 输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信 道。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述发送单元具体用于
通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
本申请的另一方面, 提供一种终端, 包括:
接收器, 用于获得至少两个参考信号资源, 所述至少两个参考信号资源 分别对应第一传输点和至少一个第二传输点, 所述第一传输点为所述终端当 前接入的传输点;
所述接收器, 还用于利用所述至少两个参考信号资源, 接收参考信号, 以及将所述参考信号传输给处理器;
所述处理器, 用于根据第一预编码矩阵和所述参考信号, 获得所述参考 信号的质量信息 , 以及将所述参考信号的质量信息传输给发送器;
所述发送器, 用于向所述第一传输点发送所述参考信号的质量信息, 以 使得所述第一传输点指示所述终端接入一个第二传输点。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收器获得的所述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS 资源中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收器具体用于
利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应 的参考信号的集合或所述参考信号的子集。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收器, 还用于
接收所述第一传输点发送的第一指示信息, 所述第一指示信息用于指示 所述第一预编码矩阵。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述处理器获得的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI 中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所述接收器, 还用于
在所述终端接入所述一个第二传输点之后, 接收所述一个第二传输点发 送的第二指示信息, 以及将所述第二指示信息传输给所述发送器, 所述第二 指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点根 据接收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用于 指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预 编码矩阵的子集;
所述发送器, 还用于
根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所 述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编 码矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述 集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合适的预编码 降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终 端与所述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二 传输点之间的信道。
本申请的另一方面, 提供一种传输点, 包括: 发送器, 用于向终端发送第一指示信息, 所述第一指示信息用于指示第 一预编码矩阵, 所述第一预编码矩阵用于调整所述终端接收的参考信号的质 量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少两 个参考信号资源分别对应不同的传输单元, 所述传输单元包括所述传输点和 至少一个第二传输点, 所述传输点为所述终端当前接入的传输点;
接收器, 用于接收所述终端发送的所述参考信号的质量信息, 以及将所 述参考信号的质量信息传输给处理器, 所述参考信号的质量信息为所述终端 根据所述参考信号和所述第一指示信息所指示的第一预编码矩阵获得;
所述处理器, 用于根据所述参考信号的质量信息, 指示所述终端接入一 个第二传输点。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多 个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述参考信号包括所述至少两个参考信号资源对应的参考信号的集合或所述参 考信号的子集。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述接收器接收的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI 中的一个或多个。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述发送器, 还用于
在所述终端接入所述一个第二传输点之后, 向所述一个第二传输点发送 第三指示信息, 所述第三指示信息用于指示所述传输点使用的与第一信道匹 配的第二预编码矩阵或所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 述传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述传 输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信 道。
如上所述的方面和任一可能的实现方式, 进一步提供一种实现方式, 所 述发送器具体用于
通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
由上述技术方案可知, 本申请实施例通过终端根据第一预编码矩阵和第 一传输点和所述第二传输点发送的参考信号, 获得每个传输点对应的信道经 过预编码之后的所述参考信号的质量信息, 从而使得所述终端能够更精确地 获得经过预编码的参考信号的质量信息, 以便所述第一传输点将所述终端切 换到一个合适的第二传输点, 实现各个传输点之间的分流, 从而提高了终端 的接入可靠性。 附图说明 为了更清楚地说明本申请实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图是本申请的一些实施例, 对于本领域普通技术人员来讲, 在 不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本申请一实施例提供的接入方法的流程示意图;
图 2为本申请另一实施例提供的接入方法的流程示意图;
图 3为本申请另一实施例提供的接入方法的流程示意图;
图 4为本申请另一实施例提供的接入方法的流程示意图;
图 5为本申请另一实施例提供的终端的结构示意图;
图 6为本申请另一实施例提供的传输点的结构示意图;
图 7为本申请另一实施例提供的终端的结构示意图;
图 8为本申请另一实施例提供的传输点的结构示意图。 具体实施方式 为使本申请实施例的目的、 技术方案和优点更加清楚, 下面将结合本申 请实施例中的附图, 对本申请实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本申请一部分实施例, 而不是全部的实施例。 基于 本申请中的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获 得的所有其他实施例, 都属于本申请保护的范围。
本发明的技术方案, 可以应用于各种无线通信系统, 例如, 全球移动通 信系统 ( Global System for Mobile Communications, GSM ) 、 通用分组无 线业务 ( General Packet Radio Service, GPRS ) 系统、 码分多址(Code Division Multiple Access, CDMA ) 系统、 CDMA2000系统、 宽带码分多址 ( Wideband Code Division Multiple Access, WCDMA ) 系统、 长期演进 ( Long Term Evolution , LTE ) 系统或全球啟波接入互操作性 (World Interoperability for Microwave Access, WiMAX ) 系统等。
本发明实施例的第一传输点或第二传输点可以为宏基站, 例如, 可以是
GSM系统、 GPRS系统或 CDMA系统中的基站( Base Transceiver Station , BTS ) , 还可以是 CDMA2000系统或 WCDMA系统中的基站(NodeB ) , 还可以是 LTE 系统中的演进型基站 (Evolved NodeB, eNB ) , 还可以是 WiMAX 网络中的接入服务网络的基站 (Access Service Network Base Station, ASN BS )等网元。
本发明实施例的第一传输点或第二传输点可以为低功率节点, 例如, 可 以是微基站(Micro ) , 或者还可以是微微基站(Pico ) , 或者还可以是远端 射频头 (Remote Radio Head , RRH ) , 或者还可以是中继设备( Relay ) , 或者也可以是毫微微基站(Femto ) , 本发明实施例对此不进行限制。
其中, 所述第一传输点和所述第二传输点中包含有源天线系统(Active
Antenna System, AAS ) 的基站天线。
本发明实施例的终端可以是 GSM系统、 GPRS系统或 CDMA系统中的 移动台 (Mobile Station, MS ) , 还可以是 CDMA2000系统、 WCDMA系统 或 LTE系统中的用户设备(User Equipment, UE )等网元。
另外, 本文中术语"和 /或", 仅仅是一种描述关联对象的关联关系, 表示 可以存在三种关系, 例如, A和 /或 B, 可以表示: 单独存在 A, 同时存在 A 和 B, 单独存在 B这三种情况。 另外, 本文中字符 ", —般表示前后关联对 象是一种"或"的关系。
图 1为本申请一实施例提供的接入方法的流程示意图, 如图 1所示。 101、终端获得至少两个参考信号资源,所述至少两个参考信号资源分别 对应第一传输点和至少一个第二传输点, 所述第一传输点为所述终端当前接 入的传输点。
102、 所述终端利用所述至少两个参考信号资源, 接收参考信号。
103、所述终端根据第一预编码矩阵和所述参考信号,获得所述参考信号 的质量信息。
104、所述终端向所述第一传输点发送所述参考信号的质量信息, 以使得 所述第一传输点指示所述终端接入一个第二传输点。
在无线通信系统例如, 异构网网络部署场景中, 所述第一传输点和所述 至少一个第二传输点可以具有相同的小区标识, 或者还可以具有不同的小区 标识。 也就是说, 所述至少两个参考信号资源可以是一个小区内的多个传输 点分别对应的参考信号资源, 或者也可以是不同小区内的传输点分别对应的 参考信号资源。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号资源可以包 括信道状态信息参考信号 ( Channel State Information Reference Signal, CSI RS ) 资源、 解调参考信号 (DeModulation Reference Signal, DM RS ) 资源和小区特定的参考信号(Cell-specific Reference Signal , CRS )资源中 的一个或多个。
例如, 所述 CSI RS资源可以是资源配置, 或者还可以为资源配置和子 帧配置的组合。 其中, 资源配置可以是 CSI RS 在一个资源块(Resource Block, RB ) 中的资源配置, 例如, 占用不同的子载波或者符号或者序列的 端口号; 子帧配置可以是发送 CSI RS的子帧的周期或者偏移量。
再例如, 所述 DM RS资源可以是资源配置, 或者还可以为资源配置和 子帧配置的组合。 其中, 资源配置可以是 DM RS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 DM RS的子帧的周期或者偏移 量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双 方共知。
再例如, 所述 CRS资源可以是资源配置, 或者还可以为资源配置和子帧 配置的组合。 其中, 资源配置可以是 CRS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 CRS的子帧的周期或者偏移量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双方共知。
可选地, 在本实施例的一个可选实施方式中, 所述终端具体可以获得所 述第一传输点通过高层信令(即由物理下行共享信道(Physical Downlink Shared Channel , PDSCH )承载所述高层信令)或者下行控制信息 (即由 物理下行控制信道 ( Physical Downlink Control Channel, PDCCH )或者增 强的 PDCCH ( enhanced PDCCH , ePDCCH )承载所述下行控制信息)发 送的所述至少两个参考信号资源配置信息, 根据所述至少两个参考信号资源 配置信息, 获得所述至少两个参考信号资源。
例如, 所述高层信令可以是无线资源控制 (Radio Resource Control, RRC ) 消息, 具体可以通过 RRC消息中的信息元素( Information Element, IE )携带所述至少两个参考信号资源配置信息, 所述 RRC消息可以为现有技 术中的 RRC 消息, 例如, RRC 连接重配置 ( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述至少两个参考信号资源配置信息, 或者所 述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是媒体访问控制 (Media Access Control, MAC )控制元素 ( Control Element, CE ) 消息, 通过增加新的 MAC CE携 带所述至少两个参考信号资源配置信息。
可选地, 在本实施例的一个可选实施方式中, 在 102中, 所述终端具体 可以利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应 的参考信号的集合或所述参考信号的子集。
具体地, 所述参考信号的子集可以是所述第一传输点通过高层信令或者 下行控制信息发送的指示, 用以指示从所述参考信号资源对应的参考信号的 集合中选择部分参考信号作为所述参考信号的子集, 例如, 从所述参考信号 资源对应的参考信号的集合中选择其中的第一个参考信号, 或者第一个参考 信号与第二个参考信号作为所述参考信号的子集。 例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述指示, 所述 RRC消息可以为现有技术中的 RRC消息, 例如, RRC 连接重配置( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施 例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述指示, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述指示。
具体地, 所述参考信号的子集可以是预先定义的, 例如, 预先定义从所 述参考信号资源对应的参考信号的集合中选择其中的第一个参考信号, 或者 第一个参考信号与第二个参考信号作为所述参考信号的子集。
可选地, 在本实施例的一个可选实施方式中, 在 103之前, 所述终端还 可以进一步接收所述第一传输点发送的第一指示信息 (例如, 所述第一预编 码矩的索引值) , 所述第一指示信息用于指示所述第一预编码矩阵。
具体地, 所述第一指示信息具体可以为所述第一传输点通过高层信令或 者下行控制信息发送给终端。 其中, 所述第一传输点具体可以从预先定义的 预编码矩阵集合或者码本中选择所述第一预编码矩阵。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述第一指示信息, 所述 RRC消息可以为现有技术中的 RRC消息, 例 如, RRC连接重配置( RRC CONNECTION RECONFIGURATION )消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述 第一指示信息, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC 消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述第一指示信息。
具体地, 所述索引值可以是秩指示(Rank Indicator, Rl )和预编码矩阵 指示 ( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对 此不进行限定。
需要说明的是, 所述第一预编码矩阵可以是所述第一指示信息所指示的 预编码矩阵,或者还可以是所述第一指示信息所指示的预编码矩阵的一部分, 例如, 由所述预编码矩阵的行或列组成的矩阵。 可选地, 在本实施例的一个可选实施方式中, 在 103之前, 所述终端还 可以进一步根据预先配置得到所述第一指示信息, 例如, 协议约定从预先定 义的预编码矩阵集合或者码本中选择所述第一预编码矩阵。
具体地, 所述第一预编码矩阵, 可以是使参考信号对应的波束倾角提升 的预编码矩阵, 能够使得终端的信号质量得到增加; 或者也可以是使参考信 号对应的波束倾角下降的预编码矩阵, 能够使得终端的信号质量得到降低。 因此, 终端当前接入的传输点可以根据需要调整的终端, 特别是该传输点的 覆盖范围边缘的终端与该传输点、 其它传输点之间的关联。
以 4个天线端口为例, 使得使参考信号对应的波束倾角提升的预编码矩 阵可以是 = ([1 eie eiW eJ3e ) , ( f表示矩阵或者矢量的转置; S表示波束 提升的倾角, 例如 =士; τ/40 ,士 π!Ύ1 , ± φ0 。
需要说明的是, 对于所述第一传输点和所述第二传输点对应的参考信号 资源可以分别利用各自对应的所述第一预编码矩阵进行预编码, 从而使得终 端能够更精确地获得参考信号经过波束调整之后的信道质量信息; 对于所述 第一传输点和所述第二传输点对应的参考信号资源也可以是没有经过所述第 一预编码矩阵预编码的参考信号资源 , 从而能够降低信令开销。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号的质量信息 可以包括但不限于参考信号接收功率 ( Reference Signal Received Power, RSRP )、参考信号接收质量( Reference Signal Received Quality, RSRQ )、 参考信号强度指示 ( Reference Signal Strength Indicator, RSSI )和信道质 量指示 (Channel Quality Indicator, CQI ) 中的一个或多个。
以 LTE系统中的 RSRP为例,详细说明所述 UE根据第一预编码矩阵和 所述参考信号, 获得所述参考信号的 RSRP。 所述 UE具体可以根据携带所 述参考信号的资源单元( Resource Element, RE )上经过所述第一预编码矩 阵预编码之后得到的接收功率, 在测量带宽上的线性平均, 获得所述参考信 号的 RSRP。
具体地, 所述 UE具体可以根据接收到的参考信号或者所述参考信号的 子集, 获得信道估计, 记为 H; 然后, 所述 UE利用获得的第一预编码矩阵, 记为 P,获得经过所述第一预编码矩阵预编码之后的信道,记为 He,即 He=HP; 所述 UE根据获得的各个携带所述参考信号的 RE得到多个 He, 获得对应的 接收功率, 并对上述接收功率在所考虑的测量带宽上进行线性平均得到参考 信号的 RSRP。
例如, 某一 REk或者多个 RE (即 RE集合 k )上得到的 He为 mxn的矩 阵, 其中 m为接收天线数, n为经过所述第一预编码矩阵预编码之后的发射 天线端口数, 则 UE则可以根据如下公式, 计算获得参考信号的 RSRP。
RSRPk ^∑∑(He);; (1 ) mn ~ ~Γ J 可以理解的是, 所述 UE还可以釆用其它适用的方法, 获得参考信号的 RSRP, 例如, 乘以合适的比例缩放因子等。
本实施例中, 所述第一预编码矩阵可以调整波束倾角, 从而能够调整终 端从各个传输点的参考信号得到的信号质量。 因此, 终端当前接入的传输点 可以根据负载均衡的需要, 调整终端特别是该传输点的覆盖范围边缘的终端 与该传输点、 其它传输点之间的关联, 从而有利于各个传输点之间的数据分 流。 同时, 根据所述第一传输点和所述第二传输点的参考信号和所述第一预 编码矩阵得到各个传输点对应的信道经过预编码之后的信号质量信息, 使得 终端能够更精确地获得参考信号的质量信息。
可选地, 在本实施例的一个可选实施方式中, 在 104中, 所述终端具体 可以通过高层信令、 物理上行控制信道 ( Physical Uplink Control Channel, PUCCH ) 或者物理上行共享信道 ( Physical Uplink Shared Channel , PUCCH ) , 向所述第一传输点发送所述参考信号的质量信息。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述参考信号的质量信息, 所述 RRC消息可以为现有技术中的 RRC消 息,例如, RRC连接重配置完成( RRC CONNECTION RECONFIGURATION COMPLETE ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息 的 IE进行扩展携带所述参考信号的质量信息, 或者所述 RRC消息也可以为 不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述参考信号的质量信息。
本实施例中, 通过终端根据第一预编码矩阵和第一传输点和所述第二传 输点发送的参考信号, 获得每个传输点对应的信道经过预编码之后的所述参 考信号的质量信息, 从而使得所述终端能够更精确地获得经过预编码的参考 信号的质量信息, 以便所述第一传输点将所述终端切换到一个合适的第二传 输点, 实现各个传输点之间的分流, 从而提高了终端的接入可靠性。
图 2为本申请另一实施例提供的接入方法的流程示意图, 如图 2所示。 与上述图 1对应的实施例相比, 在 104之后, 本实施例提供的接入方法还可 以进一步包括:
201、所述终端接收所述一个第二传输点发送的第二指示信息,所述第二 指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点根 据接收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用于 指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预 编码矩阵的子集。
202、所述终端根据所述第二指示信息, 向所述一个第二传输点发送第四 指示信息, 所述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或 所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所述第二预编 码矩阵或所述第二预编码矩阵的子集之外的其他预编码矩阵或所述其他预编 码矩阵的子集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合 适的预编码矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行 预编码, 以降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信 道为所述终端与所述第一传输点之间的信道, 所述第二信道为所述终端与所 述一个第二传输点之间的信道。
其中, 所述第二指示信息所指示的第二预编码矩阵可以包括但不限于禁 止使用的预编码矩阵、 已经使用的预编码矩阵或干扰使用的预编码矩阵。
具体地, 所述第二指示信息可以为所述第二预编码矩阵的索引值; 所述 第四指示信息可以为所述其他预编码矩阵的索引值。 其中, 具体地, 所述索 引值可以是秩指示( Rank Indicator, Rl )和预编码矩阵指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第二预编码矩阵可以 包括但不限于所述第一传输点在各个物理资源块( Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。 可选地, 在本实施例的一个可选实施方式中, 所述第三预编码矩阵可以 包括但不限于所述第二传输点在各个物理资源块( Physical Resource Block,
PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述第一传输点具体可以 通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
可选地, 所述第一传输点还可以通过其他信令或者回传方式, 向所述一 个第二传输点发送所述第三指示信息, 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第四指示信息所指示 的其他预编码矩阵或所述其他预编码矩阵的子集为与第二信道匹配的第三预 编码矩阵或所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所 述第二预编码矩阵或所述第二预编码矩阵的子集之外的矩阵或该矩阵的子 集。 例如, 所述其他预编码矩阵或所述其他预编码矩阵的子集可以为在与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中, 与所述第二 预编码矩阵或所述第二预编码矩阵的子集正交或准正交的预编码矩阵或所述 预编码矩阵的子集。
具体地, 所述第二指示信息所指示的所述第一传输点使用的与第一信道 匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 记为 P。
例如, 所述终端可以根据方程(2 ) , 确定所述第四指示信息所指示的其 他预编码矩阵或所述其他预编码矩阵的子集。
y = H3VS+n (2) 其中, y是接收信号矢量, H3是终端与所述一个第二传输点之间的信道 矩阵, V是所述其他预编码矩阵或所述其他预编码矩阵的子集, S是所述一个 第二传输点发射的调制符号矢量, n是干扰和噪声。
具体地, 所述 V为与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了 P之外的矩阵或该矩阵的子集, 例如, 与 P正交或准正交 的矩阵或该矩阵的子集。
再例如, 所述终端可以根据方程(3 ) , 确定所述第四指示信息所指示的 其他预编码矩阵或所述其他预编码矩阵的子集。
y = H3VS + H4Pq + n (3) 其中, y是接收信号矢量, H3是终端与所述一个第二传输点之间的信道 矩阵, ^是终端与所述第一传输点之间的信道矩阵, Ϋ是所述其他预编码矩 阵或所述其他预编码矩阵的子集, S是所述第一传输点发射的调制符号矢量, n是干扰和噪声。 具体地, H4Pq作为对所述终端的干扰项。
根据上述方程(2 )或者(3 ) , 基于容量或者吞吐量最大化或者其它准 则, 计算获得所述第四指示信息所指示的其他预编码矩阵或所述其他预编码 矩阵的子集, 详细描述可以参见现有技术中的相关内容, 此处不再赘述。
本实施例中, 通过终端接收所述终端切换到的所述一个第二传输点发送 的第二指示信息, 所述第二指示信息用于指示所述第一传输点使用的与第一 信道匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 所述第二指示信 息为所述一个第二传输点根据接收的所述第一传输点发送的第三指示信息确 定, 所述第三指示信息用于指示所述第一传输点使用的与第一信道匹配的第 二预编码矩阵或所述第二预编码矩阵的子集, 从而使得所述终端能够根据所 述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预编码矩 阵的子集, 更精确地向第二传输点反馈可用的预编码矩阵, 能够有效避免第 一传输点所使用的与第一信道匹配的第二预编码矩阵对所述终端造成的干 扰, 从而进一步提高了所述终端和所述第二传输点的吞吐量。
图 3为本申请另一实施例提供的接入方法的流程示意图, 如图 3所示。
301、 第一传输点向终端发送第一指示信息(例如, 所述第一预编码矩的 索引值) , 所述第一指示信息用于指示第一预编码矩阵, 所述第一预编码矩 阵用于调整所述终端接收的参考信号的质量, 所述参考信号为所述终端根据 至少两个参考信号资源接收, 所述至少两个参考信号资源分别对应不同的传 输单元, 所述传输单元包括所述第一传输点和至少一个第二传输点, 所述第 一传输点为所述终端当前接入的传输点。
302、所述第一传输点接收所述终端发送的所述参考信号的质量信息,所 述参考信号的质量信息为所述终端根据所述参考信号和所述第一指示信息所 指示的第一预编码矩阵获得。
303、所述第一传输点根据所述参考信号的质量信息,指示所述终端接入 一个第二传输点。
在无线通信系统例如, 异构网网络部署场景中, 所述第一传输点和所述 至少一个第二传输点可以具有相同的小区标识, 或者还可以具有不同的小区 标识。 也就是说, 所述至少两个参考信号资源可以是一个小区内的多个传输 点分别对应的参考信号资源, 或者也可以是不同小区内的传输点分别对应的 参考信号资源。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号资源可以包 括信道状态信息参考信号 (Channel State Information Reference Signal, CSI RS ) 资源、 解调参考信号 ( DeModulation Reference Signal, DM RS ) 资源和小区特定的参考信号(Cell-specific Reference Signal , CRS )资源中 的一个或多个。
例如, 所述 CSI RS资源可以是资源配置, 或者还可以为资源配置和子 帧配置的组合。 其中, 资源配置可以是 CSI RS 在一个资源块(Resource Block, RB ) 中的资源配置, 例如, 占用不同的子载波或者符号或者序列的 端口号; 子帧配置可以是发送 CSI RS的子帧的周期或者偏移量。
再例如, 所述 DM RS资源可以是资源配置, 或者还可以为资源配置和 子帧配置的组合。 其中, 资源配置可以是 DM RS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 DM RS的子帧的周期或者偏移 量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双 方共知。
再例如, 所述 CRS资源可以是资源配置, 或者还可以为资源配置和子帧 配置的组合。 其中, 资源配置可以是 CRS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 CRS的子帧的周期或者偏移量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双方共知。
可选地, 在本实施例的一个可选实施方式中, 所述第一传输点具体可以 通过高层信令(即由物理下行共享信道( Physical Downlink Shared Channel , PDSCH )承载所述高层信令) 或者下行控制信息 (即由物理下行控制信道 ( Physical Downlink Control Channel , PDCCH ) 或者增强的 PDCCH ( enhanced PDCCH , ePDCCH )承载所述下行控制信息) , 向所述终端发 送所述至少两个参考信号资源配置信息, 以使得所述终端根据所述至少两个 参考信号资源配置信息, 获得所述至少两个参考信号资源。
例如, 所述高层信令可以是无线资源控制 (Radio Resource Control, RRC ) 消息, 具体可以通过 RRC消息中的信息元素 ( Information Element, IE )携带所述至少两个参考信号资源配置信息, 所述 RRC消息可以为现有技 术中的 RRC 消息, 例如, RRC 连接重配置 ( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述至少两个参考信号资源配置信息, 或者所 述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是媒体访问控制 (Media Access Control, MAC )控制元素 ( Control Element, CE ) 消息, 通过增加新的 MAC CE携 带所述至少两个参考信号资源配置信息。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号可以包括但 不限于所述至少两个参考信号资源对应的参考信号的集合或所述参考信号的 子集。 具体地, 所述终端具体可以利用所述至少两个参考信号资源, 接收所 述至少两个参考信号资源对应的参考信号的集合或所述参考信号的子集。
具体地, 所述参考信号的子集可以是所述第一传输点通过高层信令或者 下行控制信息发送的指示, 用以指示从所述参考信号资源对应的参考信号的 集合中选择部分参考信号作为所述参考信号的子集, 例如, 从所述参考信号 资源对应的参考信号的集合中选择其中的第一个参考信号, 或者第一个参考 信号与第二个参考信号作为所述参考信号的子集。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述指示, 所述 RRC消息可以为现有技术中的 RRC消息, 例如, RRC 连接重配置( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施 例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述指示, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述指示。
具体地, 所述参考信号的子集可以是预先定义的, 例如, 预先定义从所 述参考信号资源对应的参考信号的集合中选择其中的第一个参考信号, 或者 第一个参考信号与第二个参考信号作为所述参考信号的子集。
具体地, 在 301 中, 所述第一指示信息具体可以为所述第一传输点通过 高层信令或者下行控制信息发送给终端。 其中, 所述第一传输点具体可以从 预先定义的预编码矩阵集合或者码本中选择所述第一预编码矩阵。 例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述第一指示信息, 所述 RRC消息可以为现有技术中的 RRC消息, 例 如, RRC连接重配置( RRC CONNECTION RECONFIGURATION )消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述 第一指示信息, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC 消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述第一指示信息。
具体地, 所述索引值可以是秩指示(Rank Indicator, Rl )和预编码矩阵 指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对 此不进行限定。
需要说明的是, 所述第一预编码矩阵可以是所述第一指示信息所指示的 预编码矩阵,或者还可以是所述第一指示信息所指示的预编码矩阵的一部分, 例如, 由所述预编码矩阵的行或列组成的矩阵。
具体地, 所述第一预编码矩阵, 可以是使参考信号对应的波束倾角提升 的预编码矩阵, 能够使得终端的信号质量得到增加; 或者也可以是使参考信 号对应的波束倾角下降的预编码矩阵, 能够使得终端的信号质量得到降低。 因此, 终端当前接入的传输点可以根据需要调整的终端, 特别是该传输点的 覆盖范围边缘的终端与该传输点、 其它传输点之间的关联。
需要说明的是, 对于所述第一传输点和所述第二传输点对应的参考信号 资源可以分别利用各自对应的所述第一预编码矩阵进行预编码, 从而使得终 端能够更精确地获得参考信号经过波束调整之后的信道质量信息; 对于所述 第一传输点和所述第二传输点对应的参考信号资源也可以是没有经过所述第 一预编码矩阵预编码的参考信号资源 , 从而能够降低信令开销。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号的质量信息 可以包括但不限于参考信号接收功率 ( Reference Signal Received Power, RSRP )、参考信号接收质量( Reference Signal Received Quality, RSRQ )、 参考信号强度指示 ( Reference Signal Strength Indicator, RSSI )和信道质 量指示 (Channel Quality Indicator, CQI ) 中的一个或多个。
以 LTE系统中的 RSRP为例,详细说明所述 UE根据第一预编码矩阵和 所述参考信号, 获得所述参考信号的 RSRP。 所述 UE具体可以根据携带所 述参考信号的资源单元( Resource Element, RE )上经过所述第一预编码矩 阵预编码之后得到的接收功率, 在测量带宽上的线性平均, 获得所述参考信 号的 RSRP。
具体地, 所述 UE具体可以根据接收到的参考信号或者所述参考信号的 子集, 获得信道估计, 记为 H; 然后, 所述 UE利用获得的第一预编码矩阵, 记为 P,获得经过所述第一预编码矩阵预编码之后的信道,记为 He,即 He=HP; 所述 UE根据获得的各个携带所述参考信号的 RE得到多个 He, 获得对应的 接收功率, 并对上述接收功率在所考虑的测量带宽上进行线性平均得到参考 信号的 RSRP。
例如, 某一 REk或者多个 RE (即 RE集合 k )上得到的 He为 mxn的矩 阵, 其中 m为接收天线数, n为经过所述第一预编码矩阵预编码之后的发射 天线端口数, 则 UE则可以根据如下公式, 计算获得参考信号的 RSRP。
1^1¾ =丄£ 1¾ 2 (1 )
mn 可以理解的是, 所述 UE还可以釆用其它适用的方法, 获得参考信号的 RSRP, 例如, 乘以合适的比例缩放因子等。
本实施例中, 所述第一预编码矩阵可以调整波束倾角, 从而能够调整终 端从各个传输点的参考信号得到的信号质量。 因此, 终端当前接入的传输点 可以根据负载均衡的需要, 调整终端特别是该传输点的覆盖范围边缘的终端 与该传输点、 其它传输点之间的关联, 从而有利于各个传输点之间的数据分 流。 同时, 根据所述第一传输点和所述第二传输点的参考信号和所述第一预 编码矩阵得到各个传输点对应的信道经过预编码之后的信号质量信息, 使得 终端能够更精确地获得参考信号的质量信息。
可选地, 在本实施例的一个可选实施方式中, 在 302中, 所述第一传输 点具体可以接收所述终端通过高层信令、物理上行控制信道(Physical Uplink Control Channel, PUCCH )或者物理上行共享信道( Physical Uplink Shared Channel, PUCCH ) , 发送的所述参考信号的质量信息。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述参考信号的质量信息, 所述 RRC消息可以为现有技术中的 RRC消 息,例如, RRC连接重配置完成( RRC CONNECTION RECONFIGURATION COMPLETE ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息 的 IE进行扩展携带所述参考信号的质量信息, 或者所述 RRC消息也可以为 不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述参考信号的质量信息。
本实施例中, 通过终端根据第一预编码矩阵和第一传输点和所述第二传 输点发送的参考信号, 获得每个传输点对应的信道经过预编码之后的所述参 考信号的质量信息, 从而使得所述终端能够更精确地获得经过预编码的参考 信号的质量信息, 以便所述第一传输点将所述终端切换到一个合适的第二传 输点, 实现各个传输点之间的分流, 从而提高了终端的接入可靠性。
图 4为本申请另一实施例提供的接入方法的流程示意图, 如图 4所示。 与上述图 3对应的实施例相比, 在 303之后, 本实施例提供的接入方法还可 以进一步包括:
401、所述第一传输点向所述一个第二传输点发送第三指示信息,所述第 三指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩 阵或所述第二预编码矩阵的子集。
这样, 则可以使得所述一个第二传输点根据所述第三指示信息, 确定第 二指示信息, 所述第二指示信息用于指示所述第一传输点使用的与第一信道 匹配的第二预编码矩阵或所述第二预编码矩阵的子集; 以及所述一个第二传 输点向所述终端发送所述第二指示信息, 以使得所述终端根据所述第二指示 信息, 向所述一个第二传输点发送第四指示信息, 所述第四指示信息用于指 示与第二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中除了所 述第二指示信息所指示的所述第二预编码矩阵或所述第二预编码矩阵的子集 传输点根据所述第四指示信息, 选择合适的预编码矩阵, 并利用选择的所述 预编码矩阵对所述终端的下行数据进行预编码, 以降低所述第一传输点对所 述一个第二传输点的干扰, 所述第一信道为所述终端与所述第一传输点之间 的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信道。
其中, 所述第二指示信息所指示的第二预编码矩阵可以包括但不限于禁 止使用的预编码矩阵、 已经使用的预编码矩阵或干扰使用的预编码矩阵。 具体地, 所述第二指示信息可以为所述第二预编码矩阵的索引值; 所述 第四指示信息可以为所述其他预编码矩阵的索引值。 其中, 具体地, 所述索 引值可以是秩指示( Rank Indicator, Rl )和预编码矩阵指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第二预编码矩阵可以 包括但不限于所述第一传输点在各个物理资源块( Physical Resource Block,
PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述第三预编码矩阵可以 包括但不限于所述第二传输点在各个物理资源块( Physical Resource Block,
PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 在 401 中, 所述第一传输 点具体可以通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
可选地, 所述第一传输点还可以通过其他信令或者回传方式, 向所述一 个第二传输点发送所述第三指示信息, 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第四指示信息所指示 的其他预编码矩阵或所述其他预编码矩阵的子集为与第二信道匹配的第三预 编码矩阵或所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所 述第二预编码矩阵或所述第二预编码矩阵的子集之外的矩阵或该矩阵的子 集。 例如, 所述其他预编码矩阵或所述其他预编码矩阵的子集可以为在与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中, 与所述第二 预编码矩阵或所述第二预编码矩阵的子集正交或准正交的预编码矩阵或所述 预编码矩阵的子集。
具体地, 所述第二指示信息所指示的所述第一传输点使用的与第一信道 匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 记为 P。
例如, 所述终端可以根据方程(2 ) , 确定所述第四指示信息所指示的其 他预编码矩阵或所述其他预编码矩阵的子集。
y = H3VS + n (2) 其中, y是接收信号矢量, H3是终端与所述一个第二传输点之间的信道 矩阵, V是所述其他预编码矩阵或所述其他预编码矩阵的子集, S是所述一个 第二传输点发射的调制符号矢量, n是干扰和噪声。
具体地, 所述 V为与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了 P之外的矩阵或该矩阵的子集, 例如, 与 P正交或准正交 的矩阵或该矩阵的子集。
再例如, 所述终端可以根据方程(3 ) , 确定所述第四指示信息所指示的 其他预编码矩阵或所述其他预编码矩阵的子集。
y = H3VS + H4Pq + n (3) 其中, y是接收信号矢量, H3是终端与所述一个第二传输点之间的信道 矩阵, ^是终端与所述第一传输点之间的信道矩阵, Ϋ是所述其他预编码矩 阵或所述其他预编码矩阵的子集, S是所述第一传输点发射的调制符号矢量, n是干扰和噪声。 具体地, H4Pq作为对所述终端的干扰项。
根据上述方程(2 )或者(3 ) , 基于容量或者吞吐量最大化或者其它准 贝' J , 计算获得所述第四指示信息所指示的其他预编码矩阵或所述其他预编码 矩阵的子集, 详细描述可以参见现有技术中的相关内容, 此处不再赘述。
本实施例中, 通过所述第一传输点向所述一个第二传输点发送第三指示 信息, 所述第三指示信息用于指示所述第一传输点使用的与第一信道匹配的 第二预编码矩阵或所述第二预编码矩阵的子集, 以及所述一个第二传输点根 据所述第三指示信息, 确定第二指示信息并发送给所述终端, 所述第二指示 信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所 述第二预编码矩阵的子集, 从而使得所述终端能够根据所述第一传输点使用 的与第一信道匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 更精确 地向第二传输点反馈可用的预编码矩阵, 能够有效避免第一传输点所使用的 与第一信道匹配的第二预编码矩阵对所述终端造成的干扰, 从而进一步提高 了所述终端和所述第二传输点的吞吐量。
需要说明的是, 对于前述的各方法实施例, 为了简单描述, 故将其都表 述为一系列的动作组合, 但是本领域技术人员应该知悉, 本申请并不受所描 述的动作顺序的限制, 因为依据本申请, 某些步骤可以釆用其他顺序或者同 时进行。 其次, 本领域技术人员也应该知悉, 说明书中所描述的实施例均属 于优选实施例, 所涉及的动作和模块并不一定是本申请所必须的。
在上述实施例中, 对各个实施例的描述都各有侧重, 某个实施例中没有 详述的部分, 可以参见其他实施例的相关描述。
图 5为本申请另一实施例提供的终端的结构示意图, 如图 5所示。 本实 施例的终端可以包括接收单元 51、 处理单元 52和发送单元 53。 其中, 接收 单元 51 , 用于获得至少两个参考信号资源, 所述至少两个参考信号资源分别 对应第一传输点和至少一个第二传输点, 所述第一传输点为所述终端当前接 入的传输点; 所述接收单元 51 , 还用于利用所述至少两个参考信号资源, 接 收参考信号, 以及将所述参考信号传输给处理单元 52; 所述处理单元 52, 用于根据第一预编码矩阵和所述参考信号, 获得所述参考信号的质量信息, 以及将所述参考信号的质量信息传输给发送单元 53; 所述发送单元 53, 用 于向所述第一传输点发送所述参考信号的质量信息, 以使得所述第一传输点 指示所述终端接入一个第二传输点。
在无线通信系统例如, 异构网网络部署场景中, 所述第一传输点和所述 至少一个第二传输点可以具有相同的小区标识, 或者还可以具有不同的小区 标识。 也就是说, 所述至少两个参考信号资源可以是一个小区内的多个传输 点分别对应的参考信号资源, 或者也可以是不同小区内的传输点分别对应的 参考信号资源。
可选地,在本实施例的一个可选实施方式中, 所述接收单元 51获得的所 述参考信号资源可以包括信道状态信息参考信号( Channel State Information Reference Signal, CSI RS )资源、解调参考信号 ( DeModulation Reference Signal , DM RS ) 资源和小区特定的参考信号 ( Cell-specific Reference Signal, CRS ) 资源中的一个或多个。
例如, 所述 CSI RS资源可以是资源配置, 或者还可以为资源配置和子 帧配置的组合。 其中, 资源配置可以是 CSI RS 在一个资源块(Resource Block, RB ) 中的资源配置, 例如, 占用不同的子载波或者符号或者序列的 端口号; 子帧配置可以是发送 CSI RS的子帧的周期或者偏移量。
再例如, 所述 DM RS资源可以是资源配置, 或者还可以为资源配置和 子帧配置的组合。 其中, 资源配置可以是 DM RS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 DM RS的子帧的周期或者偏移 量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双 方共知。 再例如, 所述 CRS资源可以是资源配置, 或者还可以为资源配置和子帧 配置的组合。 其中, 资源配置可以是 CRS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 CRS的子帧的周期或者偏移量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双方共知。
可选地,在本实施例的一个可选实施方式中, 所述接收单元 51具体可以 获得所述第一传输点通过高层信令 (即由物理下行共享信道 ( Physical Downlink Shared Channel, PDSCH )承载所述高层信令)或者下行控制信 息 (即由物理下行控制信道 ( Physical Downlink Control Channel, PDCCH ) 或者增强的 PDCCH ( enhanced PDCCH , ePDCCH )承载所述下行控制信 息)发送的所述至少两个参考信号资源配置信息, 根据所述至少两个参考信 号资源配置信息, 获得所述至少两个参考信号资源。
例如, 所述高层信令可以是无线资源控制 (Radio Resource Control, RRC ) 消息, 具体可以通过 RRC消息中的信息元素( Information Element, IE )携带所述至少两个参考信号资源配置信息, 所述 RRC消息可以为现有技 术中的 RRC 消息, 例如, RRC 连接重配置 ( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述至少两个参考信号资源配置信息, 或者所 述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是媒体访问控制 (Media Access Control, MAC )控制元素 ( Control Element, CE ) 消息, 通过增加新的 MAC CE携 带所述至少两个参考信号资源配置信息。
可选地,在本实施例的一个可选实施方式中, 所述接收单元 51具体可以 用于利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应 的参考信号的集合或所述参考信号的子集。
具体地, 所述参考信号的子集可以是所述第一传输点通过高层信令或者 下行控制信息发送的指示, 用以指示从所述参考信号资源对应的参考信号的 集合中选择部分参考信号作为所述参考信号的子集, 例如, 从所述参考信号 资源对应的参考信号的集合中选择其中的第一个参考信号, 或者第一个参考 信号与第二个参考信号作为所述参考信号的子集。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述指示, 所述 RRC消息可以为现有技术中的 RRC消息, 例如, RRC 连接重配置( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施 例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述指示, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述指示。
具体地, 所述参考信号的子集可以是预先定义的, 例如, 预先定义从所 述参考信号资源对应的参考信号的集合中选择其中的第一个参考信号, 或者 第一个参考信号与第二个参考信号作为所述参考信号的子集。
可选地, 在本实施例的一个可选实施方式中, 所述接收单元 51 , 还可以 进一步用于接收所述第一传输点发送的第一指示信息 (例如, 所述第一预编 码矩的索引值) , 所述第一指示信息用于指示所述第一预编码矩阵。
具体地, 所述第一指示信息具体可以为所述第一传输点通过高层信令或 者下行控制信息发送给终端。 其中, 所述第一传输点具体可以从预先定义的 预编码矩阵集合或者码本中选择所述第一预编码矩阵。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述第一指示信息, 所述 RRC消息可以为现有技术中的 RRC消息, 例 如, RRC连接重配置( RRC CONNECTION RECONFIGURATION )消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述 第一指示信息, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC 消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述第一指示信息。
具体地, 所述索引值可以是秩指示(Rank Indicator, Rl )和预编码矩阵 指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对 此不进行限定。
需要说明的是, 所述第一预编码矩阵可以是所述第一指示信息所指示的 预编码矩阵,或者还可以是所述第一指示信息所指示的预编码矩阵的一部分, 例如, 由所述预编码矩阵的行或列组成的矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述接收单元 51 , 还可以 进一步用于根据预先配置得到所述第一指示信息, 例如, 协议约定从预先定 义的预编码矩阵集合或者码本中选择所述第一预编码矩阵。
具体地, 所述第一预编码矩阵, 可以是使参考信号对应的波束倾角提升 的预编码矩阵, 能够使得终端的信号质量得到增加; 或者也可以是使参考信 号对应的波束倾角下降的预编码矩阵, 能够使得终端的信号质量得到降低。 因此, 终端当前接入的传输点可以根据需要调整的终端, 特别是该传输点的 覆盖范围边缘的终端与该传输点、 其它传输点之间的关联。
需要说明的是, 对于所述第一传输点和所述第二传输点对应的参考信号 资源可以分别利用各自对应的所述第一预编码矩阵进行预编码, 从而使得终 端能够更精确地获得参考信号经过波束调整之后的信道质量信息; 对于所述 第一传输点和所述第二传输点对应的参考信号资源也可以是没有经过所述第 一预编码矩阵预编码的参考信号资源 , 从而能够降低信令开销。
可选地,在本实施例的一个可选实施方式中, 所述处理单元 52获得的所 述参考信号的质量信息可以包括但不限于参考信号接收功率 ( Reference Signal Received Power, RSRP ) 、 参考信号接收质量 ( Reference Signal Received Quality, RSRQ )、参考信号强度指示( Reference Signal Strength Indicator, RSSI )和信道质量指示 ( Channel Quality Indicator, CQI ) 中的 一个或多个。
可选地,在本实施例的一个可选实施方式中, 所述发送单元 53具体可以 通过高层信令、 物理上行控制信道 ( Physical Uplink Control Channel , PUCCH ) 或者物理上行共享信道 ( Physical Uplink Shared Channel , PUCCH ) , 向所述第一传输点发送所述参考信号的质量信息。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述参考信号的质量信息, 所述 RRC消息可以为现有技术中的 RRC消 息,例如, RRC连接重配置完成( RRC CONNECTION RECONFIGURATION COMPLETE ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息 的 IE进行扩展携带所述参考信号的质量信息, 或者所述 RRC消息也可以为 不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述参考信号的质量信息。 本实施例中, 终端通过处理单元根据第一预编码矩阵和第一传输点和所 述第二传输点发送的参考信号, 获得每个传输点对应的信道经过预编码之后 的所述参考信号的质量信息, 从而使得所述终端能够更精确地获得经过预编 码的参考信号的质量信息, 以便所述第一传输点将所述终端切换到一个合适 的第二传输点, 实现各个传输点之间的分流, 从而提高了终端的接入可靠性。
可选地, 在本实施例的一个可选实施方式中, 所述接收单元 51 , 还可以 进一步用于在所述终端接入所述一个第二传输点之后, 接收所述一个第二传 输点发送的第二指示信息, 以及将所述第二指示信息传输给所述发送单元 53, 所述第二指示信息用于指示所述第一传输点使用的与第一信道匹配的第 二预编码矩阵或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个 第二传输点根据接收的所述第一传输点发送的第三指示信息确定, 所述第三 指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 相应地, 所述发送单元 53, 还可以进一步用 于根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所 述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点 之间的信道。
其中, 所述第二指示信息所指示的第二预编码矩阵可以包括但不限于禁 止使用的预编码矩阵、 已经使用的预编码矩阵或干扰使用的预编码矩阵。
具体地, 所述第二指示信息可以为所述第二预编码矩阵的索引值; 所述 第四指示信息可以为所述其他预编码矩阵的索引值。 其中, 具体地, 所述索 引值可以是秩指示( Rank Indicator, Rl )和预编码矩阵指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第二预编码矩阵可以 包括但不限于所述第一传输点在各个物理资源块( Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述第三预编码矩阵可以 包括但不限于所述第二传输点在各个物理资源块( Physical Resource Block,
PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 所述第一传输点还可以通过其他信令或者回传方式, 向所述一 个第二传输点发送所述第三指示信息, 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第四指示信息所指示 的其他预编码矩阵或所述其他预编码矩阵的子集为与第二信道匹配的第三预 编码矩阵或所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所 述第二预编码矩阵或所述第二预编码矩阵的子集之外的矩阵或该矩阵的子 集。 例如, 所述其他预编码矩阵或所述其他预编码矩阵的子集可以为在与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中, 与所述第二 预编码矩阵或所述第二预编码矩阵的子集正交或准正交的预编码矩阵或所述 预编码矩阵的子集。
本实施例中, 终端通过接收单元接收所述终端切换到的所述一个第二传 输点发送的第二指示信息, 所述第二指示信息用于指示所述第一传输点使用 的与第一信道匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 所述第 二指示信息为所述一个第二传输点根据接收的所述第一传输点发送的第三指 示信息确定, 所述第三指示信息用于指示所述第一传输点使用的与第一信道 匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 从而使得发送单元能 够根据所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二 预编码矩阵的子集, 更精确地向第二传输点反馈可用的预编码矩阵, 能够有 效避免第一传输点所使用的与第一信道匹配的第二预编码矩阵对所述终端造 成的干扰, 从而进一步提高了所述终端和所述第二传输点的吞吐量。
图 6为本申请另一实施例提供的传输点的结构示意图, 如图 6所示。 本 实施例的传输点可以包括发送单元 61、 接收单元 62和处理单元 63。 其中, 发送单元 61 , 用于向终端发送第一指示信息, 所述第一指示信息用于指示第 一预编码矩阵, 所述第一预编码矩阵用于调整所述终端接收的参考信号的质 量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少两 个参考信号资源分别对应不同的传输单元, 所述传输单元包括所述传输点和 至少一个第二传输点, 所述传输点为所述终端当前接入的传输点; 接收单元
62, 用于接收所述终端发送的所述参考信号的质量信息, 以及将所述参考信 号的质量信息传输给处理单元 63, 所述参考信号的质量信息为所述终端根据 所述参考信号和所述第一指示信息所指示的第一预编码矩阵获得; 所述处理 单元 63, 用于根据所述参考信号的质量信息, 指示所述终端接入一个第二传 输点。
在无线通信系统例如, 异构网网络部署场景中, 所述传输点和所述至少 一个第二传输点可以具有相同的小区标识,或者还可以具有不同的小区标识。 也就是说, 所述至少两个参考信号资源可以是一个小区内的多个传输点分别 对应的参考信号资源, 或者也可以是不同小区内的传输点分别对应的参考信 号资源。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号资源可以包 括信道状态信息参考信号 ( Channel State Information Reference Signal, CSI RS ) 资源、 解调参考信号 ( DeModulation Reference Signal, DM RS ) 资源和小区特定的参考信号( Cell-specific Reference Signal , CRS )资源中 的一个或多个。
例如, 所述 CSI RS资源可以是资源配置, 或者还可以为资源配置和子 帧配置的组合。 其中, 资源配置可以是 CSI RS 在一个资源块(Resource Block, RB ) 中的资源配置, 例如, 占用不同的子载波或者符号或者序列的 端口号; 子帧配置可以是发送 CSI RS的子帧的周期或者偏移量。
再例如, 所述 DM RS资源可以是资源配置, 或者还可以为资源配置和 子帧配置的组合。 其中, 资源配置可以是 DM RS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 DM RS的子帧的周期或者偏移 量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述传输点双方共 知。
再例如, 所述 CRS资源可以是资源配置, 或者还可以为资源配置和子帧 配置的组合。 其中, 资源配置可以是 CRS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 CRS的子帧的周期或者偏移量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述传输点双方共知。
可选地,在本实施例的一个可选实施方式中,发送单元 61具体可以通过 高层信令(即由物理下行共享信道 ( Physical Downlink Shared Channel,
PDSCH )承载所述高层信令) 或者下行控制信息 (即由物理下行控制信道 ( Physical Downlink Control Channel , PDCCH ) 或者增强的 PDCCH ( enhanced PDCCH , ePDCCH )承载所述下行控制信息) , 向所述终端发 送所述至少两个参考信号资源配置信息, 以使得所述终端根据所述至少两个 参考信号资源配置信息, 获得所述至少两个参考信号资源。
例如, 所述高层信令可以是无线资源控制 (Radio Resource Control, RRC ) 消息, 具体可以通过 RRC消息中的信息元素( Information Element,
IE )携带所述至少两个参考信号资源配置信息, 所述 RRC消息可以为现有技 术中的 RRC 消息, 例如, RRC 连接重配置 ( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施例对此不进行限定, 通过对已有的
RRC消息的 IE进行扩展携带所述至少两个参考信号资源配置信息, 或者所 述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是媒体访问控制 (Media Access Control, MAC )控制元素 ( Control Element, CE ) 消息, 通过增加新的 MAC CE携 带所述至少两个参考信号资源配置信息。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号可以包括但 不限于所述至少两个参考信号资源对应的参考信号的集合或所述参考信号的 子集。 具体地, 所述终端具体可以利用所述至少两个参考信号资源, 接收所 述至少两个参考信号资源对应的参考信号的集合或所述参考信号的子集。
具体地, 所述参考信号的子集可以是所述传输点通过高层信令或者下行 控制信息发送的指示, 用以指示从所述参考信号资源对应的参考信号的集合 中选择部分参考信号作为所述参考信号的子集, 例如, 从所述参考信号资源 对应的参考信号的集合中选择其中的第一个参考信号, 或者第一个参考信号 与第二个参考信号作为所述参考信号的子集。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述指示, 所述 RRC消息可以为现有技术中的 RRC消息, 例如, RRC 连接重配置( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施 例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述指示, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC消息。 再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述指示。
具体地, 所述参考信号的子集可以是预先定义的, 例如, 预先定义从所 述参考信号资源对应的参考信号的集合中选择其中的第一个参考信号, 或者 第一个参考信号与第二个参考信号作为所述参考信号的子集。
具体地,所述第一指示信息具体可以为所述发送单元 61通过高层信令或 者下行控制信息发送给终端。 其中, 所述传输点具体可以从预先定义的预编 码矩阵集合或者码本中选择所述第一预编码矩阵。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述第一指示信息, 所述 RRC消息可以为现有技术中的 RRC消息, 例 如, RRC连接重配置( RRC CONNECTION RECONFIGURATION )消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述 第一指示信息, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC 消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述第一指示信息。
具体地, 所述索引值可以是秩指示(Rank Indicator, Rl )和预编码矩阵 指示 ( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对 此不进行限定。
需要说明的是, 所述第一预编码矩阵可以是所述第一指示信息所指示的 预编码矩阵,或者还可以是所述第一指示信息所指示的预编码矩阵的一部分, 例如, 由所述预编码矩阵的行或列组成的矩阵。
具体地, 所述第一预编码矩阵, 可以是使参考信号对应的波束倾角提升 的预编码矩阵, 能够使得终端的信号质量得到增加; 或者也可以是使参考信 号对应的波束倾角下降的预编码矩阵, 能够使得终端的信号质量得到降低。 因此, 终端当前接入的传输点可以根据需要调整的终端, 特别是该传输点的 覆盖范围边缘的终端与该传输点、 其它传输点之间的关联。
需要说明的是, 对于所述传输点和所述第二传输点对应的参考信号资源 可以分别利用各自对应的所述第一预编码矩阵进行预编码, 从而使得终端能 够更精确地获得参考信号经过波束调整之后的信道质量信息; 对于所述传输 点和所述第二传输点对应的参考信号资源也可以是没有经过所述第一预编码 矩阵预编码的参考信号资源 , 从而能够降低信令开销。
可选地,在本实施例的一个可选实施方式中, 所述接收单元 62接收的所 述参考信号的质量信息可以包括但不限于参考信号接收功率 ( Reference Signal Received Power, RSRP ) 、 参考信号接收质量( Reference Signal Received Quality, RSRQ )、参考信号强度指示( Reference Signal Strength Indicator, RSSI )和信道质量指示 ( Channel Quality Indicator, CQI ) 中的 一个或多个。
可选地,在本实施例的一个可选实施方式中, 所述接收单元 62具体可以 接收所述终端通过高层信令、 物理上行控制信道(Physical Uplink Control Channel , PUCCH ) 或者物理上行共享信道 ( Physical Uplink Shared Channel, PUCCH ) , 发送的所述参考信号的质量信息。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述参考信号的质量信息, 所述 RRC消息可以为现有技术中的 RRC消 息,例如, RRC连接重配置完成( RRC CONNECTION RECONFIGURATION COMPLETE ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息 的 IE进行扩展携带所述参考信号的质量信息, 或者所述 RRC消息也可以为 不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述参考信号的质量信息。
本实施例中, 通过终端根据第一预编码矩阵和传输点和所述第二传输点 发送的参考信号, 获得每个传输点对应的信道经过预编码之后的所述参考信 号的质量信息, 从而使得所述终端能够更精确地获得经过预编码的参考信号 的质量信息, 以便处理单元将所述终端切换到一个合适的第二传输点, 实现 各个传输点之间的分流, 从而提高了终端的接入可靠性。
可选地,在本实施例的一个可选实施方式中, 所述发送单元 61还可以进 一步用于在所述终端接入所述一个第二传输点之后, 向所述一个第二传输点 发送第三指示信息, 所述第三指示信息用于指示所述传输点使用的与第一信 道匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 述传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述传 输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信 道。
这样, 则可以使得所述一个第二传输点根据所述第三指示信息, 确定第 二指示信息, 所述第二指示信息用于指示所述传输点使用的与第一信道匹配 的第二预编码矩阵或所述第二预编码矩阵的子集; 以及所述一个第二传输点 向所述终端发送所述第二指示信息,以使得所述终端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述第四指示信息用于指示与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中除了所述第二 指示信息所指示的所述第二预编码矩阵或所述第二预编码矩阵的子集之外的 其他预编码矩阵或所述其他预编码矩阵的子集, 以使得所述一个第二传输点 根据所述第四指示信息, 选择合适的预编码矩阵, 并利用选择的所述预编码 矩阵对所述终端的下行数据进行预编码, 以降低所述传输点对所述一个第二 传输点的干扰, 所述第一信道为所述终端与所述传输点之间的信道, 所述第 二信道为所述终端与所述一个第二传输点之间的信道。
其中, 所述第二指示信息所指示的第二预编码矩阵可以包括但不限于禁 止使用的预编码矩阵、 已经使用的预编码矩阵或干扰使用的预编码矩阵。
具体地, 所述第二指示信息可以为所述第二预编码矩阵的索引值; 所述 第四指示信息可以为所述其他预编码矩阵的索引值。 其中, 具体地, 所述索 引值可以是秩指示( Rank Indicator, Rl )和预编码矩阵指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对此不进行限定。 可选地, 在本实施例的一个可选实施方式中, 所述第二预编码矩阵可以 包括但不限于所述传输点在各个物理资源块(Physical Resource Block,
PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述第三预编码矩阵可以 包括但不限于所述第二传输点在各个物理资源块( Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地,在本实施例的一个可选实施方式中, 所述发送单元 61具体可以 用于通过 X2接口 , 向所述一个第二传输点发送所述第三指示信息。
可选地,在本实施例的一个可选实施方式中, 所述发送单元 61具体还可 以通过其他信令或者回传方式, 向所述一个第二传输点发送所述第三指示信 息, 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第四指示信息所指示 的其他预编码矩阵或所述其他预编码矩阵的子集为与第二信道匹配的第三预 编码矩阵或所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所 述第二预编码矩阵或所述第二预编码矩阵的子集之外的矩阵或该矩阵的子 集。 例如, 所述其他预编码矩阵或所述其他预编码矩阵的子集可以为在与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中, 与所述第二 预编码矩阵或所述第二预编码矩阵的子集正交或准正交的预编码矩阵或所述 预编码矩阵的子集。
本实施例中, 传输点通过发送单元向所述一个第二传输点发送第三指示 信息, 所述第三指示信息用于指示所述传输点使用的与第一信道匹配的第二 预编码矩阵或所述第二预编码矩阵的子集, 以及所述一个第二传输点根据所 述第三指示信息, 确定第二指示信息并发送给所述终端, 所述第二指示信息 用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预 编码矩阵的子集, 从而使得所述终端能够根据所述传输点使用的与第一信道 匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 更精确地向第二传输 点反馈可用的预编码矩阵, 能够有效避免传输点所使用的与第一信道匹配的 第二预编码矩阵对所述终端造成的干扰, 从而进一步提高了所述终端和所述 第二传输点的吞吐量。
图 7为本申请另一实施例提供的终端的结构示意图, 如图 7所示。 本实 施例的终端可以包括接收器 71、 处理器 72和发送器 73。 其中, 接收器 71 , 用于获得至少两个参考信号资源, 所述至少两个参考信号资源分别对应不同 的传输器, 所述传输单元包括第一传输点和至少一个第二传输点, 所述第一 传输点为所述终端当前接入的传输点; 所述接收器 71 , 还用于利用所述至少 两个参考信号资源, 接收参考信号, 以及将所述参考信号传输给处理器 72; 所述处理器 72, 用于根据第一预编码矩阵和所述参考信号, 获得所述参考信 号的质量信息, 以及将所述参考信号的质量信息传输给发送器 73; 所述发送 器 73, 用于向所述第一传输点发送所述参考信号的质量信息, 以使得所述第 一传输点指示所述终端接入一个第二传输点。
在无线通信系统例如, 异构网网络部署场景中, 所述第一传输点和所述 至少一个第二传输点可以具有相同的小区标识, 或者还可以具有不同的小区 标识。 也就是说, 所述至少两个参考信号资源可以是一个小区内的多个传输 点分别对应的参考信号资源, 或者也可以是不同小区内的传输点分别对应的 参考信号资源。
可选地,在本实施例的一个可选实施方式中, 所述接收器 71获得的所述 参考信号资源可以包括信道状态信息参考信号 (Channel State Information Reference Signal, CSI RS )资源、解调参考信号 ( DeModulation Reference Signal , DM RS ) 资源和小区特定的参考信号 ( Cell-specific Reference Signal, CRS ) 资源中的一个或多个。
例如, 所述 CSI RS资源可以是资源配置, 或者还可以为资源配置和子 帧配置的组合。 其中, 资源配置可以是 CSI RS 在一个资源块(Resource Block, RB ) 中的资源配置, 例如, 占用不同的子载波或者符号或者序列的 端口号; 子帧配置可以是发送 CSI RS的子帧的周期或者偏移量。
再例如, 所述 DM RS资源可以是资源配置, 或者还可以为资源配置和 子帧配置的组合。 其中, 资源配置可以是 DM RS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 DM RS的子帧的周期或者偏移 量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双 方共知。
再例如, 所述 CRS资源可以是资源配置, 或者还可以为资源配置和子帧 配置的组合。 其中, 资源配置可以是 CRS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 CRS的子帧的周期或者偏移量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述第一传输点双方共知。
可选地,在本实施例的一个可选实施方式中, 所述接收器 71具体可以获 得所述第一传输点通过高层信令(即由物理下行共享信道( Physical Downlink Shared Channel , PDSCH )承载所述高层信令)或者下行控制信息 (即由 物理下行控制信道 ( Physical Downlink Control Channel, PDCCH )或者增 强的 PDCCH ( enhanced PDCCH , ePDCCH )承载所述下行控制信息)发 送的所述至少两个参考信号资源配置信息, 根据所述至少两个参考信号资源 配置信息, 获得所述至少两个参考信号资源。
例如, 所述高层信令可以是无线资源控制 (Radio Resource Control,
RRC ) 消息, 具体可以通过 RRC消息中的信息元素( Information Element,
IE )携带所述至少两个参考信号资源配置信息, 所述 RRC消息可以为现有技 术中的 RRC 消息, 例如, RRC 连接重配置 ( RRC CONNECTION
RECONFIGURATION ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述至少两个参考信号资源配置信息, 或者所 述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是媒体访问控制 (Media Access Control,
MAC )控制元素 ( Control Element, CE ) 消息, 通过增加新的 MAC CE携 带所述至少两个参考信号资源配置信息。
可选地,在本实施例的一个可选实施方式中, 所述接收器 71具体可以用 于利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应的 参考信号的集合或所述参考信号的子集。
具体地, 所述参考信号的子集可以是所述第一传输点通过高层信令或者 下行控制信息发送的指示, 用以指示从所述参考信号资源对应的参考信号的 集合中选择部分参考信号作为所述参考信号的子集, 例如, 从所述参考信号 资源对应的参考信号的集合中选择其中的第一个参考信号, 或者第一个参考 信号与第二个参考信号作为所述参考信号的子集。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述指示, 所述 RRC消息可以为现有技术中的 RRC消息, 例如, RRC 连接重配置( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施 例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述指示, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述指示。
具体地, 所述参考信号的子集可以是预先定义的, 例如, 预先定义从所 述参考信号资源对应的参考信号的集合中选择其中的第一个参考信号, 或者 第一个参考信号与第二个参考信号作为所述参考信号的子集。
可选地, 在本实施例的一个可选实施方式中, 所述接收器 71 , 还可以进 一步用于接收所述第一传输点发送的第一指示信息 (例如, 所述第一预编码 矩的索引值) , 所述第一指示信息用于指示所述第一预编码矩阵。
具体地, 所述第一指示信息具体可以为所述第一传输点通过高层信令或 者下行控制信息发送给终端。 其中, 所述第一传输点具体可以从预先定义的 预编码矩阵集合或者码本中选择所述第一预编码矩阵。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述第一指示信息, 所述 RRC消息可以为现有技术中的 RRC消息, 例 如, RRC连接重配置( RRC CONNECTION RECONFIGURATION )消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述 第一指示信息, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC 消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述第一指示信息。
具体地, 所述索引值可以是秩指示(Rank Indicator, Rl )和预编码矩阵 指示 ( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对 此不进行限定。
需要说明的是, 所述第一预编码矩阵可以是所述第一指示信息所指示的 预编码矩阵,或者还可以是所述第一指示信息所指示的预编码矩阵的一部分, 例如, 由所述预编码矩阵的行或列组成的矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述接收器 71 , 还可以进 一步用于根据预先配置得到所述第一指示信息, 例如, 协议约定从预先定义 的预编码矩阵集合或者码本中选择所述第一预编码矩阵。 具体地, 所述第一预编码矩阵, 可以是使参考信号对应的波束倾角提升 的预编码矩阵, 能够使得终端的信号质量得到增加; 或者也可以是使参考信 号对应的波束倾角下降的预编码矩阵, 能够使得终端的信号质量得到降低。 因此, 终端当前接入的传输点可以根据需要调整的终端, 特别是该传输点的 覆盖范围边缘的终端与该传输点、 其它传输点之间的关联。
需要说明的是, 对于所述第一传输点和所述第二传输点对应的参考信号 资源可以分别利用各自对应的所述第一预编码矩阵进行预编码, 从而使得终 端能够更精确地获得参考信号经过波束调整之后的信道质量信息; 对于所述 第一传输点和所述第二传输点对应的参考信号资源也可以是没有经过所述第 一预编码矩阵预编码的参考信号资源, 从而能够降低信令开销。
可选地,在本实施例的一个可选实施方式中, 所述处理器 72获得的所述 参考信号的质量信息可以包括但不限于参考信号接收功率( Reference Signal Received Power, RSRP )、参考信号接收质量 ( Reference Signal Received
Quality, RSRQ )、参考信号强度指示 ( Reference Signal Strength Indicator, RSSI )和信道质量指示 ( Channel Quality Indicator, CQI )中的一个或多个。
可选地,在本实施例的一个可选实施方式中, 所述发送器 73具体可以通 过高层信令、物理上行控制信道( Physical Uplink Control Channel, PUCCH ) 或者物理上行共享信道 ( Physical Uplink Shared Channel, PUCCH ) , 向 所述第一传输点发送所述参考信号的质量信息。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述参考信号的质量信息, 所述 RRC消息可以为现有技术中的 RRC消 息,例如, RRC连接重配置完成( RRC CONNECTION RECONFIGURATION COMPLETE ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息 的 IE进行扩展携带所述参考信号的质量信息, 或者所述 RRC消息也可以为 不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述参考信号的质量信息。
本实施例中, 终端通过处理器根据第一预编码矩阵和第一传输点和所述 第二传输点发送的参考信号, 获得每个传输点对应的信道经过预编码之后的 所述参考信号的质量信息, 从而使得所述终端能够更精确地获得经过预编码 的参考信号的质量信息, 以便所述第一传输点将所述终端切换到一个合适的 第二传输点, 实现各个传输点之间的分流, 从而提高了终端的接入可靠性。
可选地, 在本实施例的一个可选实施方式中, 所述接收器 71 , 还可以进 一步用于在所述终端接入所述一个第二传输点之后, 接收所述一个第二传输 点发送的第二指示信息, 以及将所述第二指示信息传输给所述发送器 73, 所 述第二指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编 码矩阵或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传 输点根据接收的所述第一传输点发送的第三指示信息确定, 所述第三指示信 息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述 第二预编码矩阵的子集; 相应地, 所述发送器 73, 还可以进一步用于根据所 述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述第四指示 信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子 集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第二预编码 述一个第二传输点根据所述第四指示信息, 选择合适的预编码矩阵, 并利用 选择的所述预编码矩阵对所述终端的下行数据进行预编码, 以降低所述第 ― 传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述第 ― 传输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的 信道。
其中, 所述第二指示信息所指示的第二预编码矩阵可以包括但不限于禁 止使用的预编码矩阵、 已经使用的预编码矩阵或干扰使用的预编码矩阵。
具体地, 所述第二指示信息可以为所述第二预编码矩阵的索引值; 所述 第四指示信息可以为所述其他预编码矩阵的索引值。 其中, 具体地, 所述索 引值可以是秩指示( Rank Indicator, Rl )和预编码矩阵指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第二预编码矩阵可以 包括但不限于所述第一传输点在各个物理资源块( Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述第三预编码矩阵可以 包括但不限于所述第二传输点在各个物理资源块( Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 所述第一传输点还可以通过其他信令或者回传方式, 向所述一 个第二传输点发送所述第三指示信息, 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第四指示信息所指示 的其他预编码矩阵或所述其他预编码矩阵的子集为与第二信道匹配的第三预 编码矩阵或所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所 述第二预编码矩阵或所述第二预编码矩阵的子集之外的矩阵或该矩阵的子 集。 例如, 所述其他预编码矩阵或所述其他预编码矩阵的子集可以为在与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中, 与所述第二 预编码矩阵或所述第二预编码矩阵的子集正交或准正交的预编码矩阵或所述 预编码矩阵的子集。
本实施例中, 终端通过接收器接收所述终端切换到的所述一个第二传输 点发送的第二指示信息, 所述第二指示信息用于指示所述第一传输点使用的 与第一信道匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 所述第二 指示信息为所述一个第二传输点根据接收的所述第一传输点发送的第三指示 信息确定, 所述第三指示信息用于指示所述第一传输点使用的与第一信道匹 配的第二预编码矩阵或所述第二预编码矩阵的子集, 从而使得发送器能够根 据所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预编 码矩阵的子集, 更精确地向第二传输点反馈可用的预编码矩阵, 能够有效避 免第一传输点所使用的与第一信道匹配的第二预编码矩阵对所述终端造成的 干扰, 从而进一步提高了所述终端和所述第二传输点的吞吐量。
图 8为本申请另一实施例提供的传输点的结构示意图, 如图 8所示。 本 实施例的传输点可以包括发送器 81、 接收器 82和处理器 83。 其中, 发送器 81 , 用于向终端发送第一指示信息, 所述第一指示信息用于指示第一预编码 矩阵, 所述第一预编码矩阵用于调整所述终端接收的参考信号的质量, 所述 参考信号为所述终端根据至少两个参考信号资源接收, 所述至少两个参考信 号资源分别对应不同的传输器, 所述传输器包括所述传输点和至少一个第二 传输点, 所述传输点为所述终端当前接入的传输点; 接收器 82, 用于接收所 述终端发送的所述参考信号的质量信息, 以及将所述参考信号的质量信息传 输给处理器 83, 所述参考信号的质量信息为所述终端根据所述参考信号和所 述第一指示信息所指示的第一预编码矩阵获得; 所述处理器 83, 用于根据所 述参考信号的质量信息, 指示所述终端接入一个第二传输点。
在无线通信系统例如, 异构网网络部署场景中, 所述传输点和所述至少 一个第二传输点可以具有相同的小区标识,或者还可以具有不同的小区标识。 也就是说, 所述至少两个参考信号资源可以是一个小区内的多个传输点分别 对应的参考信号资源, 或者也可以是不同小区内的传输点分别对应的参考信 号资源。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号资源可以包 括信道状态信息参考信号 ( Channel State Information Reference Signal, CSI RS ) 资源、 解调参考信号 (DeModulation Reference Signal, DM RS ) 资源和小区特定的参考信号(Cell-specific Reference Signal , CRS )资源中 的一个或多个。
例如, 所述 CSI RS资源可以是资源配置, 或者还可以为资源配置和子 帧配置的组合。 其中, 资源配置可以是 CSI RS 在一个资源块(Resource Block, RB ) 中的资源配置, 例如, 占用不同的子载波或者符号或者序列的 端口号; 子帧配置可以是发送 CSI RS的子帧的周期或者偏移量。
再例如, 所述 DM RS资源可以是资源配置, 或者还可以为资源配置和 子帧配置的组合。 其中, 资源配置可以是 DM RS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 DM RS的子帧的周期或者偏移 量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述传输点双方共 知。
再例如, 所述 CRS资源可以是资源配置, 或者还可以为资源配置和子帧 配置的组合。 其中, 资源配置可以是 CRS在一个 RB中的资源配置, 例如, 不同的端口号; 子帧配置可以是发送 CRS的子帧的周期或者偏移量。 其中, 所述子帧配置可以是预先定义, 为所述终端与所述传输点双方共知。
可选地,在本实施例的一个可选实施方式中,发送器 81具体可以通过高 层信令 (即由物理下行共享信道 ( Physical Downlink Shared Channel , PDSCH )承载所述高层信令) 或者下行控制信息 (即由物理下行控制信道 ( Physical Downlink Control Channel , PDCCH ) 或者增强的 PDCCH ( enhanced PDCCH , ePDCCH )承载所述下行控制信息) , 向所述终端发 送所述至少两个参考信号资源配置信息, 以使得所述终端根据所述至少两个 参考信号资源配置信息, 获得所述至少两个参考信号资源。
例如, 所述高层信令可以是无线资源控制 (Radio Resource Control, RRC ) 消息, 具体可以通过 RRC消息中的信息元素( Information Element, IE )携带所述至少两个参考信号资源配置信息, 所述 RRC消息可以为现有技 术中的 RRC 消息, 例如, RRC 连接重配置 ( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施例对此不进行限定, 通过对已有的
RRC消息的 IE进行扩展携带所述至少两个参考信号资源配置信息, 或者所 述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是媒体访问控制 (Media Access Control, MAC )控制元素 ( Control Element, CE ) 消息, 通过增加新的 MAC CE携 带所述至少两个参考信号资源配置信息。
可选地, 在本实施例的一个可选实施方式中, 所述参考信号可以包括但 不限于所述至少两个参考信号资源对应的参考信号的集合或所述参考信号的 子集。 具体地, 所述终端具体可以利用所述至少两个参考信号资源, 接收所 述至少两个参考信号资源对应的参考信号的集合或所述参考信号的子集。
具体地, 所述参考信号的子集可以是所述传输点通过高层信令或者下行 控制信息发送的指示, 用以指示从所述参考信号资源对应的参考信号的集合 中选择部分参考信号作为所述参考信号的子集, 例如, 从所述参考信号资源 对应的参考信号的集合中选择其中的第一个参考信号, 或者第一个参考信号 与第二个参考信号作为所述参考信号的子集。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述指示, 所述 RRC消息可以为现有技术中的 RRC消息, 例如, RRC 连接重配置( RRC CONNECTION RECONFIGURATION ) 消息等, 本实施 例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述指示, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述指示。
具体地, 所述参考信号的子集可以是预先定义的, 例如, 预先定义从所 述参考信号资源对应的参考信号的集合中选择其中的第一个参考信号, 或者 第一个参考信号与第二个参考信号作为所述参考信号的子集。
具体地,所述第一指示信息具体可以为所述发送器 81通过高层信令或者 下行控制信息发送给终端。 其中, 所述传输点具体可以从预先定义的预编码 矩阵集合或者码本中选择所述第一预编码矩阵。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述第一指示信息, 所述 RRC消息可以为现有技术中的 RRC消息, 例 如, RRC连接重配置( RRC CONNECTION RECONFIGURATION )消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息的 IE进行扩展携带所述 第一指示信息, 或者所述 RRC消息也可以为不同于现有技术中已有的 RRC 消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述第一指示信息。
具体地, 所述索引值可以是秩指示(Rank Indicator, Rl )和预编码矩阵 指示 ( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对 此不进行限定。
需要说明的是, 所述第一预编码矩阵可以是所述第一指示信息所指示的 预编码矩阵,或者还可以是所述第一指示信息所指示的预编码矩阵的一部分, 例如, 由所述预编码矩阵的行或列组成的矩阵。
具体地, 所述第一预编码矩阵, 可以是使参考信号对应的波束倾角提升 的预编码矩阵, 能够使得终端的信号质量得到增加; 或者也可以是使参考信 号对应的波束倾角下降的预编码矩阵, 能够使得终端的信号质量得到降低。 因此, 终端当前接入的传输点可以根据需要调整的终端, 特别是该传输点的 覆盖范围边缘的终端与该传输点、 其它传输点之间的关联。
需要说明的是, 对于所述传输点和所述第二传输点对应的参考信号资源 可以分别利用各自对应的所述第一预编码矩阵进行预编码, 从而使得终端能 够更精确地获得参考信号经过波束调整之后的信道质量信息; 对于所述传输 点和所述第二传输点对应的参考信号资源也可以是没有经过所述第一预编码 矩阵预编码的参考信号资源 , 从而能够降低信令开销。
可选地,在本实施例的一个可选实施方式中, 所述接收器 82接收的所述 参考信号的质量信息可以包括但不限于参考信号接收功率( Reference Signal Received Power, RSRP )、参考信号接收质量 ( Reference Signal Received Quality, RSRQ )、参考信号强度指示 ( Reference Signal Strength Indicator, RSSI )和信道质量指示 ( Channel Quality Indicator, CQI )中的一个或多个。
可选地,在本实施例的一个可选实施方式中, 所述接收器 82具体可以接 收所述终端通过高层信令、 物理上行控制信道 (Physical Uplink Control Channel , PUCCH ) 或者物理上行共享信道 ( Physical Uplink Shared Channel, PUCCH ) , 发送的所述参考信号的质量信息。
例如, 所述高层信令可以是 RRC消息, 具体可以通过 RRC消息中的 IE 携带所述参考信号的质量信息, 所述 RRC消息可以为现有技术中的 RRC消 息,例如, RRC连接重配置完成( RRC CONNECTION RECONFIGURATION COMPLETE ) 消息等, 本实施例对此不进行限定, 通过对已有的 RRC消息 的 IE进行扩展携带所述参考信号的质量信息, 或者所述 RRC消息也可以为 不同于现有技术中已有的 RRC消息。
再例如, 所述高层信令还可以是 MAC CE消息, 通过增加新的 MAC CE 携带所述参考信号的质量信息。
本实施例中, 通过终端根据第一预编码矩阵和传输点和所述第二传输点 发送的参考信号, 获得每个传输点对应的信道经过预编码之后的所述参考信 号的质量信息, 从而使得所述终端能够更精确地获得经过预编码的参考信号 的质量信息, 以便处理器将所述终端切换到一个合适的第二传输点, 实现各 个传输点之间的分流, 从而提高了终端的接入可靠性。
可选地,在本实施例的一个可选实施方式中, 所述发送器 81还可以进一 步用于在所述终端接入所述一个第二传输点之后, 向所述一个第二传输点发 送第三指示信息, 所述第三指示信息用于指示所述传输点使用的与第一信道 匹配的第二预编码矩阵或所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 述传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述传 输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信 道。
这样, 则可以使得所述一个第二传输点根据所述第三指示信息, 确定第 二指示信息, 所述第二指示信息用于指示所述传输点使用的与第一信道匹配 的第二预编码矩阵或所述第二预编码矩阵的子集; 以及所述一个第二传输点 向所述终端发送所述第二指示信息,以使得所述终端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述第四指示信息用于指示与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中除了所述第二 指示信息所指示的所述第二预编码矩阵或所述第二预编码矩阵的子集之外的 其他预编码矩阵或所述其他预编码矩阵的子集, 以使得所述一个第二传输点 根据所述第四指示信息, 选择合适的预编码矩阵, 并利用选择的所述预编码 矩阵对所述终端的下行数据进行预编码, 以降低所述传输点对所述一个第二 传输点的干扰, 所述第一信道为所述终端与所述传输点之间的信道, 所述第 二信道为所述终端与所述一个第二传输点之间的信道。
其中, 所述第二指示信息所指示的第二预编码矩阵可以包括但不限于禁 止使用的预编码矩阵、 已经使用的预编码矩阵或干扰使用的预编码矩阵。
具体地, 所述第二指示信息可以为所述第二预编码矩阵的索引值; 所述 第四指示信息可以为所述其他预编码矩阵的索引值。 其中, 具体地, 所述索 引值可以是秩指示( Rank Indicator, Rl )和预编码矩阵指示( Precoding Matrix Indicator, PMI ) , 或者还可以是 PMI , 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第二预编码矩阵可以 包括但不限于所述传输点在各个物理资源块(Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地, 在本实施例的一个可选实施方式中, 所述第三预编码矩阵可以 包括但不限于所述第二传输点在各个物理资源块( Physical Resource Block, PRB ) 、 子带或系统带宽上的预编码矩阵。
可选地,在本实施例的一个可选实施方式中, 所述发送器 81具体可以用 于通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
可选地,在本实施例的一个可选实施方式中, 所述发送器 81具体还可以 通过其他信令或者回传方式,向所述一个第二传输点发送所述第三指示信息, 本实施例对此不进行限定。
可选地, 在本实施例的一个可选实施方式中, 所述第四指示信息所指示 的其他预编码矩阵或所述其他预编码矩阵的子集为与第二信道匹配的第三预 编码矩阵或所述第三预编码矩阵的子集中除了所述第二指示信息所指示的所 述第二预编码矩阵或所述第二预编码矩阵的子集之外的矩阵或该矩阵的子 集。 例如, 所述其他预编码矩阵或所述其他预编码矩阵的子集可以为在与第 二信道匹配的第三预编码矩阵或所述第三预编码矩阵的子集中, 与所述第二 预编码矩阵或所述第二预编码矩阵的子集正交或准正交的预编码矩阵或所述 预编码矩阵的子集。
本实施例中, 传输点通过发送器向所述一个第二传输点发送第三指示信 息 , 所述第三指示信息用于指示所述传输点使用的与第一信道匹配的第二预 编码矩阵或所述第二预编码矩阵的子集, 以及所述一个第二传输点根据所述 第三指示信息, 确定第二指示信息并发送给所述终端, 所述第二指示信息用 于指示所述传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预编 码矩阵的子集, 从而使得所述终端能够根据所述传输点使用的与第一信道匹 配的第二预编码矩阵或所述第二预编码矩阵的子集, 更精确地向第二传输点 反馈可用的预编码矩阵, 能够有效避免传输点所使用的与第一信道匹配的第 二预编码矩阵对所述终端造成的干扰, 从而进一步提高了所述终端和所述第 二传输点的吞吐量。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 上述描 述的系统, 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应 过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间 的耦合或直接耦合或通信连接可以是通过一些接口, 装置或单元的间接耦合 或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的, 作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或 者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单 元中。 上述集成的单元既可以釆用硬件的形式实现, 也可以釆用硬件加软件 功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元, 可以存储在一个计算机 可读取存储介质中。 上述软件功能单元存储在一个存储介质中, 包括若干指 令用以使得一台计算机设备 (可以是个人计算机, 服务器, 或者网络设备等) 或处理器(processor )执行本申请各个实施例所述方法的部分步骤。 而前述 的存储介质包括: U盘、移动硬盘、只读存储器( Read-Only Memory, ROM ) , 随机存取存储器( Random Access Memory, RAM ) 、 磁碟或者光盘等各种 可以存储程序代码的介质。
最后应说明的是: 以上实施例仅用以说明本申请的技术方案, 而非对其 限制; 尽管参照前述实施例对本申请进行了详细的说明, 本领域的普通技术 人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或 者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技 术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims

权 利 要求 书
1、 一种接入方法, 其特征在于, 包括:
终端获得至少两个参考信号资源, 所述至少两个参考信号资源分别对应 第一传输点和至少一个第二传输点, 所述第一传输点为所述终端当前接入的 传输点;
所述终端利用所述至少两个参考信号资源, 接收参考信号;
所述终端根据第一预编码矩阵和所述参考信号, 获得所述参考信号的质 量信息;
所述终端向所述第一传输点发送所述参考信号的质量信息, 以使得所述 第一传输点指示所述终端接入一个第二传输点。
2、 根据权利要求 1 所述的方法, 其特征在于, 所述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多个。
3、根据权利要求 1或 2所述的方法, 其特征在于, 所述终端利用所述至 少两个参考信号资源, 接收参考信号, 包括:
所述终端利用所述至少两个参考信号资源, 接收所述至少两个参考信号 资源对应的参考信号的集合或所述参考信号的子集。
4、 根据权利要求 1 ~3任一权利要求所述的方法, 其特征在于, 所述终 端根据第一预编码矩阵和所述参考信号,获得所述参考信号的质量信息之前, 还包括:
所述终端接收所述第一传输点发送的第一指示信息, 所述第一指示信息 用于指示所述第一预编码矩阵。
5、 根据权利要求 1 ~4任一权利要求所述的方法, 其特征在于, 所述参 考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI中的一个或多个。
6、 根据权利要求 1 ~5任一权利要求所述的方法, 其特征在于, 所述终 端接入一个第二传输点之后, 还包括:
所述终端接收所述一个第二传输点发送的第二指示信息, 所述第二指示 信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所 述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点根据接 收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用于指示 所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预编码 矩阵的子集;
所述终端根据所述第二指示信息, 向所述一个第二传输点发送第四指示 信息, 所述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述 第三预编码矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩 阵或所述第二预编码矩阵的子集之外的其他预编码矩阵或所述其他预编码矩 阵的子集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合适的 预编码矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行预编 码, 以降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信道为 所述终端与所述第一传输点之间的信道, 所述第二信道为所述终端与所述一 个第二传输点之间的信道。
7、 根据权利要求 6所述的方法, 其特征在于, 所述方法还包括: 所述第一传输点通过 X2接口, 向所述一个第二传输点发送所述第三指 示信息。
8、 一种接入方法, 其特征在于, 包括:
第一传输点向终端发送第一指示信息, 所述第一指示信息用于指示第一 预编码矩阵,所述第一预编码矩阵用于调整所述终端接收的参考信号的质量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少两个参 考信号资源分别对应不同的传输单元, 所述传输单元包括所述第一传输点和 至少一个第二传输点, 所述第一传输点为所述终端当前接入的传输点;
所述第一传输点接收所述终端发送的所述参考信号的质量信息, 所述参 考信号的质量信息为所述终端根据所述参考信号和所述第一指示信息所指示 的第一预编码矩阵获得;
所述第一传输点根据所述参考信号的质量信息, 指示所述终端接入一个 第二传输点。
9、 根据权利要求 8 所述的方法, 其特征在于, 所述参考信号资源包括
CSI RS资源、 DM RS资源和 CRS资源中的一个或多个。
10、 根据权利要求 8或 9所述的方法, 其特征在于, 所述参考信号包括 所述至少两个参考信号资源对应的参考信号的集合或所述参考信号的子集。
11、 根据权利要求 8~10任一权利要求所述的方法, 其特征在于, 所述 参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI中的一个或多个。
12、 根据权利要求 8~1 1 任一权利要求所述的方法, 其特征在于, 所述 终端接入一个第二传输点之后, 还包括:
所述第一传输点向所述一个第二传输点发送第三指示信息, 所述第三指 示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或 所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码 矩阵或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行预编码, 以降低所 述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所 述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点 之间的信道。
13、 根据权利要求 12 所述的方法, 其特征在于, 所述第一传输点向所 述一个第二传输点发送第三指示信息, 包括:
所述第一传输点通过 X2接口, 向所述一个第二传输点发送所述第三指 示信息。
14、 一种终端, 其特征在于, 包括:
接收单元, 用于获得至少两个参考信号资源, 所述至少两个参考信号资 源分别对应第一传输点和至少一个第二传输点, 所述第一传输点为所述终端 当前接入的传输点;
所述接收单元, 还用于利用所述至少两个参考信号资源, 接收参考信号, 以及将所述参考信号传输给处理单元;
所述处理单元, 用于根据第一预编码矩阵和所述参考信号, 获得所述参 考信号的质量信息, 以及将所述参考信号的质量信息传输给发送单元; 所述发送单元, 用于向所述第一传输点发送所述参考信号的质量信息, 以使得所述第一传输点指示所述终端接入一个第二传输点。
15、 根据权利要求 14 所述的终端, 其特征在于, 所述接收单元获得的 所述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或 多个。
16、 根据权利要求 14或 15所述的终端, 其特征在于, 所述接收单元具 体用于
利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应 的参考信号的集合或所述参考信号的子集。
17、 根据权利要求 14~16任一权利要求所述的终端, 其特征在于, 所述 接收单元, 还用于
接收所述第一传输点发送的第一指示信息, 所述第一指示信息用于指示 所述第一预编码矩阵。
18、 根据权利要求 14~17任一权利要求所述的终端, 其特征在于, 所述 处理单元获得的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI 中的一个或多个。
19、 根据权利要求 14~18任一权利要求所述的终端, 其特征在于, 所述接收单元, 还用于
在所述终端接入所述一个第二传输点之后, 接收所述一个第二传输点发 送的第二指示信息, 以及将所述第二指示信息传输给所述发送单元, 所述第 二指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩 阵或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点 根据接收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用 于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二 预编码矩阵的子集;
所述发送单元, 还用于
根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所 述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编 码矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述 集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合适的预编码 降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终 端与所述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二 传输点之间的信道。
20、 一种传输点, 其特征在于, 包括:
发送单元, 用于向终端发送第一指示信息, 所述第一指示信息用于指示 第一预编码矩阵, 所述第一预编码矩阵用于调整所述终端接收的参考信号的 质量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少 两个参考信号资源分别对应不同的传输单元, 所述传输单元包括所述传输点 和至少一个第二传输点, 所述传输点为所述终端当前接入的传输点;
接收单元, 用于接收所述终端发送的所述参考信号的质量信息, 以及将 所述参考信号的质量信息传输给处理单元, 所述参考信号的质量信息为所述 终端根据所述参考信号和所述第一指示信息所指示的第一预编码矩阵获得; 所述处理单元, 用于根据所述参考信号的质量信息, 指示所述终端接入 一个第二传输点。
21、 根据权利要求 20 所述的传输点, 其特征在于, 所述参考信号资源 包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多个。
22、 根据权利要求 20或 21所述的传输点, 其特征在于, 所述参考信号 包括所述至少两个参考信号资源对应的参考信号的集合或所述参考信号的子
23、 根据权利要求 20~22任一权利要求所述的传输点, 其特征在于, 所 述接收单元接收的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI 和 CQI中的一个或多个。
24、 根据权利要求 20~23任一权利要求所述的传输点, 其特征在于, 所 述发送单元还用于
在所述终端接入所述一个第二传输点之后, 向所述一个第二传输点发送 第三指示信息, 所述第三指示信息用于指示所述传输点使用的与第一信道匹 配的第二预编码矩阵或所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 述传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述传 输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信 道。
25、 根据权利要求 24 所述的传输点, 其特征在于, 所述发送单元具体 用于
通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
26、 一种终端, 其特征在于, 包括:
接收器, 用于获得至少两个参考信号资源, 所述至少两个参考信号资源 分别对应第一传输点和至少一个第二传输点, 所述第一传输点为所述终端当 前接入的传输点;
所述接收器, 还用于利用所述至少两个参考信号资源, 接收参考信号, 以及将所述参考信号传输给处理器;
所述处理器, 用于根据第一预编码矩阵和所述参考信号, 获得所述参考 信号的质量信息 , 以及将所述参考信号的质量信息传输给发送器;
所述发送器, 用于向所述第一传输点发送所述参考信号的质量信息, 以 使得所述第一传输点指示所述终端接入一个第二传输点。
27、 根据权利要求 26 所述的终端, 其特征在于, 所述接收器获得的所 述参考信号资源包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多 个。
28、 根据权利要求 26或 27所述的终端, 其特征在于, 所述接收器具体 用于 利用所述至少两个参考信号资源, 接收所述至少两个参考信号资源对应 的参考信号的集合或所述参考信号的子集。
29、 根据权利要求 26~28任一权利要求所述的终端, 其特征在于, 所述 接收器, 还用于
接收所述第一传输点发送的第一指示信息, 所述第一指示信息用于指示 所述第一预编码矩阵。
30、 根据权利要求 26~29任一权利要求所述的终端, 其特征在于, 所述 处理器获得的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI 和 CQI 中的一个或多个。
31、 根据权利要求 26~30任一权利要求所述的终端, 其特征在于, 所述接收器, 还用于
在所述终端接入所述一个第二传输点之后, 接收所述一个第二传输点发 送的第二指示信息, 以及将所述第二指示信息传输给所述发送器, 所述第二 指示信息用于指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集, 所述第二指示信息为所述一个第二传输点根 据接收的所述第一传输点发送的第三指示信息确定, 所述第三指示信息用于 指示所述第一传输点使用的与第一信道匹配的第二预编码矩阵或所述第二预 编码矩阵的子集;
所述发送器, 还用于
根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所 述第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编 码矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述 集, 以使得所述一个第二传输点根据所述第四指示信息, 选择合适的预编码 矩阵, 并利用选择的所述预编码矩阵对所述终端的下行数据进行预编码, 以 降低所述第一传输点对所述一个第二传输点的干扰, 所述第一信道为所述终 端与所述第一传输点之间的信道, 所述第二信道为所述终端与所述一个第二 传输点之间的信道。
32、 一种传输点, 其特征在于, 包括:
发送器, 用于向终端发送第一指示信息, 所述第一指示信息用于指示第 一预编码矩阵, 所述第一预编码矩阵用于调整所述终端接收的参考信号的质 量, 所述参考信号为所述终端根据至少两个参考信号资源接收, 所述至少两 个参考信号资源分别对应不同的传输单元, 所述传输单元包括所述传输点和 至少一个第二传输点, 所述传输点为所述终端当前接入的传输点;
接收器, 用于接收所述终端发送的所述参考信号的质量信息, 以及将所 述参考信号的质量信息传输给处理器, 所述参考信号的质量信息为所述终端 根据所述参考信号和所述第一指示信息所指示的第一预编码矩阵获得;
所述处理器, 用于根据所述参考信号的质量信息, 指示所述终端接入一 个第二传输点。
33、 根据权利要求 32 所述的传输点, 其特征在于, 所述参考信号资源 包括 CSI RS资源、 DM RS资源和 CRS资源中的一个或多个。
34、 根据权利要求 32或 33所述的传输点, 其特征在于, 所述参考信号 包括所述至少两个参考信号资源对应的参考信号的集合或所述参考信号的子
35、 根据权利要求 32~34任一权利要求所述的传输点, 其特征在于, 所 述接收器接收的所述参考信号的质量信息包括 RSRP、 RSRQ、 RSSI和 CQI 中的一个或多个。
36、 根据权利要求 32~35任一权利要求所述的传输点, 其特征在于, 所 述发送器, 还用于
在所述终端接入所述一个第二传输点之后, 向所述一个第二传输点发送 第三指示信息, 所述第三指示信息用于指示所述传输点使用的与第一信道匹 配的第二预编码矩阵或所述第二预编码矩阵的子集, 以使得
所述一个第二传输点根据所述第三指示信息, 确定第二指示信息, 所述 第二指示信息用于指示所述传输点使用的与第一信道匹配的第二预编码矩阵 或所述第二预编码矩阵的子集; 以及
所述一个第二传输点向所述终端发送所述第二指示信息, 以使得所述终 端根据所述第二指示信息, 向所述一个第二传输点发送第四指示信息, 所述 第四指示信息用于指示与第二信道匹配的第三预编码矩阵或所述第三预编码 矩阵的子集中除了所述第二指示信息所指示的所述第二预编码矩阵或所述第 以使得所述一个第二传输点根据所述第四指示信息,选择合适的预编码矩阵, 述传输点对所述一个第二传输点的干扰, 所述第一信道为所述终端与所述传 输点之间的信道, 所述第二信道为所述终端与所述一个第二传输点之间的信 道。
37、 根据权利要求 36 所述的传输点, 其特征在于, 所述发送器具体用 于
通过 X2接口, 向所述一个第二传输点发送所述第三指示信息。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160227485A1 (en) * 2015-01-29 2016-08-04 Intel Corporation Drs based power control in communication systems
CN108023697A (zh) * 2016-11-03 2018-05-11 华为技术有限公司 一种资源指示方法、相关设备及系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104065448B (zh) * 2013-03-22 2017-11-14 电信科学技术研究院 一种确定预编码矩阵的方法、系统和设备
WO2014157867A1 (en) * 2013-03-25 2014-10-02 Lg Electronics Inc. Method for receiving down link signal and apparatus therefor
US10237028B2 (en) * 2013-09-03 2019-03-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and arrangement for inter-cell interference coordination using precoding/beamforming
US10440625B2 (en) * 2015-08-21 2019-10-08 Lg Electronics Inc. Method and apparatus for performing handover in inter-vehicle communication system
JP6682898B2 (ja) * 2016-02-17 2020-04-15 富士通株式会社 基地局、無線通信システムおよび基地局の処理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102291740A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种传输cqi的方法及装置
CN102291229A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种信道状态信息的反馈方法、接收方法及其设备
CN102461000A (zh) * 2009-04-28 2012-05-16 诺基亚公司 信道状态信息反馈
CN102696272A (zh) * 2009-12-23 2012-09-26 高通股份有限公司 具有多个传输点的通信系统的特定于聚类的参考信号

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8831607B2 (en) * 2006-01-05 2014-09-09 Qualcomm Incorporated Reverse link other sector communication
KR101518828B1 (ko) * 2008-11-07 2015-05-11 삼성전자주식회사 통신 시스템 및 그의 통신 방법
US8750205B2 (en) * 2009-08-07 2014-06-10 Texas Instruments Incorporated Multiple rank CQI feedback for cellular networks
KR101578650B1 (ko) * 2009-08-18 2015-12-21 삼성전자주식회사 프리코딩 행렬을 이용한 데이터 송수신 방법 및 단말기
US20110244877A1 (en) * 2009-10-08 2011-10-06 Qualcomm Incorporated Method and apparatus for using channel state information reference signal in wireless communication system
WO2011055940A2 (ko) * 2009-11-05 2011-05-12 엘지전자 주식회사 채널 품질 정보의 전송 방법 및 이를 위한 장치
US8711907B2 (en) * 2010-10-01 2014-04-29 Intel Corporation PMI feedback with codebook interpolation
KR20230145222A (ko) * 2011-01-07 2023-10-17 인터디지탈 패튼 홀딩스, 인크 다중 송신 포인트의 채널 상태 정보(csi) 전달
US9426703B2 (en) * 2011-02-11 2016-08-23 Qualcomm Incorporated Cooperation and operation of macro node and remote radio head deployments in heterogeneous networks
CN102170328B (zh) * 2011-04-06 2014-01-01 普天信息技术研究院有限公司 一种支持双制式的CoMP终端及反馈方法
JP5361933B2 (ja) * 2011-04-15 2013-12-04 株式会社エヌ・ティ・ティ・ドコモ 移動端末装置、無線基地局装置、無線通信方法及び無線通信システム
EP4221048A1 (en) * 2011-05-02 2023-08-02 BlackBerry Limited Methods and systems of wireless communication with remote radio heads
US9735844B2 (en) * 2011-05-09 2017-08-15 Texas Instruments Incorporated Channel feedback for coordinated multi-point transmissions
EP2725845B1 (en) * 2011-08-05 2018-05-16 Panasonic Intellectual Property Corporation of America Terminal, transmitting device, reception quality reporting method and reception method
KR101565424B1 (ko) * 2011-08-19 2015-11-03 엘지전자 주식회사 무선 통신 시스템에서 핸드오버 방법 및 장치
US9407343B2 (en) * 2012-08-31 2016-08-02 Google Technology Holdings LLC Method and apparatus for mitigating downlink interference

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102461000A (zh) * 2009-04-28 2012-05-16 诺基亚公司 信道状态信息反馈
CN102696272A (zh) * 2009-12-23 2012-09-26 高通股份有限公司 具有多个传输点的通信系统的特定于聚类的参考信号
CN102291740A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种传输cqi的方法及装置
CN102291229A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种信道状态信息的反馈方法、接收方法及其设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2919541A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160227485A1 (en) * 2015-01-29 2016-08-04 Intel Corporation Drs based power control in communication systems
CN108023697A (zh) * 2016-11-03 2018-05-11 华为技术有限公司 一种资源指示方法、相关设备及系统
CN108023697B (zh) * 2016-11-03 2024-01-09 华为技术有限公司 一种资源指示方法、相关设备及系统

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