WO2016150007A1 - 一种构建协作集合的方法、无线节点及服务基站 - Google Patents

一种构建协作集合的方法、无线节点及服务基站 Download PDF

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Publication number
WO2016150007A1
WO2016150007A1 PCT/CN2015/080393 CN2015080393W WO2016150007A1 WO 2016150007 A1 WO2016150007 A1 WO 2016150007A1 CN 2015080393 W CN2015080393 W CN 2015080393W WO 2016150007 A1 WO2016150007 A1 WO 2016150007A1
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Prior art keywords
base station
information
wireless node
coordinated
drs
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English (en)
French (fr)
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付婷
朱亚军
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for constructing a cooperative set, a wireless node, and a serving base station.
  • UDN Ultra Density Network
  • This fixed cooperative set partitioning method is simple, but has low flexibility, limited performance gain, and cannot adapt. The situation of random changes in the deployment of small base stations in the future;
  • the other is divided by the user equipment (User Equipment, UE) dedicated cooperative set, that is, the UE measures the reference signal received power of the serving cell and the neighboring cell according to the Cell-specific Reference Signal (CRS) (Reference Signal Received Power). , RSRP) value, determine the collaboration set exclusive to the UE, and report it to the serving base station.
  • UE User Equipment
  • CRS Cell-specific Reference Signal
  • RSRP Reference Signal Received Power
  • the UE-specific cooperative set partitioning mode has good flexibility and high performance gain, but does not consider the small base station on/off scenario that may exist in the future high-density network.
  • the small-cell on/off scenario that is, the small base station adopts on/off.
  • the strategy reduces network interference and reduces network energy consumption. Specifically, it is not used in the community.
  • the small base station is temporarily turned off and is in the off state.
  • the small base station is turned on, and the off state is switched to the on state.
  • the node may switch quickly, and the duration of the switch state ranges from a few milliseconds to thousands of milliseconds.
  • the small base station sends a Discovery Reference Signal (DRS) at a large periodic interval (for example, 20ms).
  • the DRS may be the primary synchronization. Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), CRS or Channel-State Information Reference Signal (CSI-RS), etc., if adjacent base stations are in the off state.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Channel-State Information Reference Signal
  • CSI-RS Channel-State Information Reference Signal
  • the embodiment of the invention provides a method for constructing a cooperative set, a wireless node and a serving base station, which can adapt to constructing a cooperative set in a small base station on/off scenario, and has high flexibility and large performance gain.
  • a first aspect of the embodiments of the present invention provides a method for constructing a collaboration set, including:
  • the wireless node monitors a pilot signal sent by the neighboring base station for measurement, and determines a reference signal received power RSRP value of each neighboring base station;
  • the wireless node selects, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold;
  • the wireless node notifies the target base station of the information of the cooperation set to determine a set of coordinated base stations of the wireless node.
  • a second aspect of the embodiments of the present invention provides a method for constructing a collaboration set, including:
  • the serving base station receives information of the cooperation set sent by the user equipment UE, where the information of the cooperation set includes base station identification information of each coordinated base station;
  • the serving base station receives the feedback acknowledgement message of the cooperative base station, and joins the base station that has fed back the acknowledgement message to the coordinated base station list of the UE to establish a coordinated base station set.
  • a third aspect of the embodiments of the present invention provides a wireless node, including:
  • a first determining unit configured to monitor a pilot signal sent by the neighboring base station for measurement, and determine a reference signal received power RSRP value of each neighboring base station;
  • a selecting unit configured to: according to the RSRP value of each neighboring base station, select, in a neighboring base station whose RSRP value exceeds a predetermined power threshold, M base stations with the highest RSRP value to join the cooperation set;
  • a second determining unit configured to notify the target base station of the information of the cooperation set to determine a coordinated base station set of the wireless node.
  • a fourth aspect of the embodiments of the present invention provides a serving base station, including:
  • a receiving unit configured to receive information about a collaboration set sent by the user equipment UE, where the information of the cooperation set includes base station identification information of each coordinated base station;
  • a sending unit configured to send, according to the base station identification information of each coordinated base station, signaling to join the cooperation set to each coordinated base station, so that each coordinated base station sends a feedback confirmation message to the service when confirming joining the cooperation set Base station
  • the receiving unit is further configured to receive a feedback confirmation message of the coordinated base station, and join the base station that has fed back the acknowledgement message to the coordinated base station list of the UE to establish a coordinated base station set.
  • the wireless node monitors the pilot signal used by the neighboring base station for measurement, and determines the RSRP value of the reference signal received by each neighboring base station. According to the RSRP value of each neighboring base station, the RSRP value exceeds a predetermined power threshold. In the neighboring base station, the M base stations with the highest RSRP value are selected to join the cooperation set; the information of the cooperation set is notified to the target base station to determine the coordinated base station set of the wireless node.
  • the embodiment of the invention can adapt to constructing a collaboration set in a small base station on/off scenario, and has high flexibility and large performance gain.
  • FIG. 1 is a schematic diagram of an embodiment of a method for constructing a collaboration set in an embodiment of the present invention
  • FIG. 2 is a schematic diagram of another embodiment of a method for constructing a collaboration set in an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another embodiment of a method for constructing a collaboration set in an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another embodiment of a method for constructing a collaboration set in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another embodiment of a method for constructing a collaboration set in an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another embodiment of a method for constructing a collaboration set in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an embodiment of a wireless node in an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of an embodiment of a serving base station according to an embodiment of the present invention.
  • the embodiment of the invention provides a method for constructing a cooperative set, a wireless node and a serving base station, which can adapt to constructing a cooperative set in a small base station on/off scenario, and has high flexibility and large performance gain.
  • an embodiment of a method for constructing a collaboration set in an embodiment of the present invention includes:
  • the wireless node monitors a pilot signal sent by the neighboring base station for measurement, and determines a reference signal received power RSRP value of each neighboring base station.
  • the pilot signal used for measurement may include a discovery signal DRS, and the wireless node monitors the DRS sent by the neighboring base station, and may be monitored based on the pre-acquired DRS configuration information, where the DRS configuration information includes the type of the DRS signal, DRS signal transmission period, DRS signal offset
  • the DRS may be a primary synchronization signal PSS, a secondary synchronization signal SSS, a CRS, or a channel state reference signal CSI-RS, etc., and is not limited herein.
  • the pilot signal used for measurement may also include a CRS and a DRS, that is, the wireless node monitors the DRS sent by the neighbor base station in the off state, and listens to the CRS sent by the neighbor base station in the on state.
  • the wireless node may be a variety of wireless devices, such as a base station or a user equipment, and is not limited herein.
  • the DRS configuration information of the node that supports the on/off operation in the network may include:
  • the base station directly obtains the predefined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or passes the backhaul link (backhaul link refers to the access network or the cell)
  • the connection of the cell to the switching center acquires the DRS configuration information of the node supporting the on/off operation in the network from the central control node, or obtains the support on the network by the information interface with the base station supporting the on/off operation of the adjacent operation.
  • DRS configuration information of the node of the /off operation For example, if a combination of several types of DRS signals/transmission periods and offsets is specified in the standard protocol, the base station may obtain the above DRS configuration information by using blind detection.
  • the DRS configuration information of the node that supports the on/off operation in the network may include:
  • the UE directly obtains the pre-defined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or obtains the support on the network by using the notification information of the serving base station corresponding to the UE.
  • DRS configuration information of the node of the /off operation For example, the UE acquires DRS configuration information of a node supporting on/off operation in the network by using RRC signaling sent by the serving base station.
  • the wireless node selects, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold;
  • the wireless node notifies the target base station of the information of the cooperation set to determine a coordinated base station set of the wireless node.
  • the information of the cooperation set may include the base station identification information of each coordinated base station and the load information of each coordinated base station, which is not limited herein; the wireless node notifies the information of the cooperation set.
  • the target base station through interaction with the target base station, determines a coordinated set of wireless nodes.
  • the wireless node monitors the pilot signal used by the neighboring base station for measurement, and determines the RSRP value of the reference signal received by each neighboring base station. According to the RSRP value of each neighboring base station, the RSRP value exceeds a predetermined power threshold. In the neighboring base station, the M base stations with the highest RSRP value are selected to join the cooperation set; the information of the cooperation set is notified to the target base station to determine the coordinated base station set of the wireless node.
  • the embodiment of the invention can adapt to constructing a collaboration set in a small base station on/off scenario, and has high flexibility and large performance gain.
  • an embodiment of a method for constructing a collaboration set in an embodiment of the present invention includes:
  • the wireless node acquires DRS configuration information of a node that supports an on/off operation in the network.
  • the DRS configuration information includes a type of the DRS signal, a transmission period of the DRS signal, and offset information of the DRS signal.
  • the wireless node may be a variety of wireless devices, such as a base station or a user equipment, and is not limited herein.
  • the DRS configuration information of the node that supports the on/off operation in the network may include:
  • the base station directly obtains the pre-defined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or obtains the on/off operation in the network from the central control node through the backhaul link.
  • the DRS configuration information of the node or the DRS configuration information of the node supporting the on/off operation in the network is obtained through an information interface (which may be a wired interface or a wireless interface) with a base station that supports the on/off operation. For example, if a combination of several types of DRS signals/transmission periods and offsets is specified in the standard protocol, the base station may obtain the above DRS configuration information by using blind detection.
  • the DRS configuration information of the node that supports the on/off operation in the network may include:
  • the UE directly obtains the pre-defined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or uses the serving base station corresponding to the UE.
  • the notification information of the DRS configuration information of the node supporting the on/off operation in the network For example, the UE acquires DRS configuration information of a node supporting on/off operation in the network by using RRC signaling sent by the serving base station.
  • the wireless node monitors a pilot signal sent by the neighboring base station for measurement, and determines a reference signal received power RSRP value of each neighboring base station.
  • the pilot signal used for measurement may include a discovery signal DRS; the DRS may be a primary synchronization signal PSS, a secondary synchronization signal SSS, a CRS, or a channel state reference signal CSI-RS, and the like, which is not limited herein.
  • the pilot signal used for measurement may also include a CRS and a DRS, and the wireless node monitors the DRS sent by the neighbor base station in the off state, and listens to the CRS sent by the neighbor base station in the on state.
  • the wireless node selects, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold.
  • the wireless node notifies the target base station of the information of the cooperation set to determine a coordinated base station set of the wireless node.
  • the information of the cooperation set may include the base station identification information of each coordinated base station and the load information of each coordinated base station, which is not limited herein; the wireless node notifies the target base station of the information of the cooperation set, and the target base station Interactions to determine a collaborative set of wireless nodes.
  • the pilot signal used for measurement may include a common reference signal CRS and a DRS
  • the wireless node monitors a pilot signal sent by a neighbor base station for measurement, and determines each
  • the RSRP value of the neighboring base station includes: the wireless node listening to the DRS sent by the neighboring base station in the off state according to the DRS configuration information; the wireless node listening to the CRS sent by the neighboring base station in the on state; the wireless node Determining an RSRP value of each neighboring base station of the wireless node according to the monitored DRS and CRS.
  • an embodiment of a method for constructing a collaboration set in an embodiment of the present invention includes:
  • a wireless node acquires DRS configuration information of a node that supports an on/off operation in a network.
  • the DRS configuration information includes a type of the DRS signal, a transmission period of the DRS signal, and offset information of the DRS signal.
  • the wireless node may be a variety of wireless devices, such as a base station or a user equipment, and is not limited herein.
  • the DRS configuration information of the node that supports the on/off operation in the network may include:
  • the base station directly obtains the pre-defined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or obtains the on/off operation in the network from the central control node through the backhaul link.
  • the DRS configuration information of the node or the DRS configuration information of the node supporting the on/off operation in the network is obtained through an information interface (which may be a wired interface or a wireless interface) with a base station that supports the on/off operation. For example, if a combination of several types of DRS signals/transmission periods and offsets is specified in the standard protocol, the base station may obtain the above DRS configuration information by using blind detection.
  • the DRS configuration information of the node that supports the on/off operation in the network may include:
  • the UE directly obtains the pre-defined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or obtains the support on the network by using the notification information of the serving base station corresponding to the UE.
  • DRS configuration information of the node of the /off operation For example, the UE acquires DRS configuration information of a node supporting on/off operation in the network by using RRC signaling sent by the serving base station.
  • the wireless node monitors, according to the DRS configuration information, a DRS sent by a neighboring base station in an off state.
  • the pilot signal used for measurement includes a discovery signal DRS;
  • the DRS may be a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a CRS, or a channel state reference signal.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS CRS
  • channel state reference signal Channel-State Information Reference signal
  • the wireless node monitors the CRS sent by the neighboring base station in the on state.
  • the neighboring base station In the on state, the neighboring base station sends a CRS every subframe. When it is in the off state, the neighboring base station sends a Discovery Reference Signal (DRS) at a large periodic interval (for example, 20 ms).
  • DRS may be the primary synchronization signal ( Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), CRS, or Channel-State Information Reference Signal (CSI-RS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Channel-State Information Reference Signal
  • CSI-RS Channel-State Information Reference Signal
  • the wireless node can send CRS in other cells in any N subframes.
  • the time-frequency position is performed; for the DRS monitoring, the wireless node can perform the subframes in which the neighboring base stations transmit the DRS within the N maximum DRS period durations.
  • the maximum DRS period is the maximum value in the DRS period of each neighbor base station around the wireless node.
  • the wireless node determines, according to the monitored DRS and CRS, an RSRP value of each neighboring base station of the wireless node.
  • the RSRP value of the neighbor base station in the off state of the neighboring base station of the wireless node can be determined, according to The CRS may determine the RSRP value of the neighbor base station in the on state in the neighboring base station of the wireless node.
  • the wireless node selects, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold.
  • the wireless node notifies the target base station of the information of the cooperation set to determine a coordinated base station set of the wireless node.
  • the information of the cooperation set includes base station identification information of each coordinated base station and load information of each coordinated base station, and the wireless node notifies the target base station of the information of the cooperation set, and determines the wireless by interacting with the target base station.
  • a collaborative collection of nodes includes base station identification information of each coordinated base station and load information of each coordinated base station, and the wireless node notifies the target base station of the information of the cooperation set, and determines the wireless by interacting with the target base station.
  • the wireless node in FIG. 1 to FIG. 3 may be a base station or a user equipment UE.
  • the following is a detailed description of a specific embodiment. Referring to FIG. 4, an embodiment of a method for constructing a collaboration set in the embodiment of the present invention includes :
  • the base station acquires DRS configuration information of a node that supports an on/off operation in the network.
  • the DRS configuration information includes a type of the DRS signal, a transmission period of the DRS signal, and offset information of the DRS signal.
  • the DSR configuration information of the node that supports the on/off operation in the network may include:
  • the base station directly obtains the pre-defined DRS configuration information, that is, directly obtains the DRS configuration information used in the on/off scenario specified in the standard protocol, or obtains the on/off operation in the network from the central control node through the backhaul link.
  • the DRS configuration information of the node or the DRS configuration information of the node supporting the on/off operation in the network is obtained through an information interface (which may be a wired interface or a wireless interface) with a base station that supports the on/off operation. For example, if there are several DRSs specified in the standard protocol The combination of the type of the signal/the transmission period and the offset, the base station can obtain the above DRS configuration information by using blind detection.
  • the base station monitors, according to the DRS configuration information, a DRS sent by a neighboring base station in an off state.
  • the pilot signal used for measurement includes a discovery signal DRS;
  • the DRS may be a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a CRS, or a channel state reference signal.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS CRS
  • channel state reference signal Channel-State Information Reference signal
  • the base station monitors the CRS sent by the neighboring base station in the on state.
  • the neighboring base station In the on state, the neighboring base station sends a CRS every subframe. When it is in the off state, the neighboring base station sends a Discovery Reference Signal (DRS) at a large periodic interval (for example, 20 ms).
  • DRS may be the primary synchronization signal ( Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), CRS, or Channel-State Information Reference Signal (CSI-RS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Channel-State Information Reference Signal
  • CSI-RS Channel-State Information Reference Signal
  • the base station may perform the time-frequency position of the CRS in other N subframes in other cells; for the monitoring of the DRS, the base station may send the neighboring base stations in the surrounding N maximum DRS period durations. Performed on the subframe of the DRS.
  • the maximum DRS period is the maximum value in the DRS period of each neighbor base station around the wireless node.
  • the base station determines, according to the monitored DRS and CRS, an RSRP value of each neighboring base station of the wireless node.
  • the RSRP value of the neighbor base station in the off state of the neighboring base station of the base station can be determined according to the DRS, according to
  • the CRS may determine an RSRP value of a neighbor base station in an on state in the neighbor base station of the base station.
  • the base station selects, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold.
  • the base station separately reports the information of the cooperation set to the M base stations in the cooperation set, so that each coordinated base station sends a feedback acknowledgement message to the base station when confirming joining the cooperation set.
  • the information of the cooperation set includes base station identification information of each coordinated base station and each association.
  • the manner in which the base station separately reports the information of the cooperation set to the M base stations in the cooperation set may be:
  • the base station transmits the cooperative base station ID information of the base station to the central control node, and the central control node notifies each coordinated base station.
  • the base station transmits information requesting to join the cooperation set to each coordinated base station through an information exchange interface with the cooperative base station, for example, an X2 interface.
  • the base station receives a feedback acknowledgement message of the coordinated base station, and joins the coordinated base station that has fed back the acknowledgement message to the cooperative base station list of the base station to establish a coordinated base station set.
  • the base station separately notifies the information of the cooperation set to the M base stations in the cooperation set, and is also different here:
  • the cooperative base station for example, Node 1
  • the acknowledgment message is fed back to the central control node
  • the base station receives the feedback confirmation message of the cooperative base station sent by the central control node, and cooperates with the feedback confirmation message.
  • the base station joins the cooperative base station list of the base station to establish a coordinated base station set. For example, after receiving the acknowledgment information of the Node 1, the central control node feeds back the Node1 to confirm the information of joining the cooperation set, and the Node 0 receives the acknowledgment message of the Node 1 sent by the central control node, and then adds the Node 1 to the present. In the list of cooperative base stations of the base station (Node 0).
  • the cooperative base station for example, Node 1
  • the acknowledgment message is fed back through the information exchange interface with the base station, and the cooperative base station is included in the cooperative base station list of the base station.
  • the base station Node 0
  • the base station Node 0
  • the base station Node 0
  • an embodiment of a method for constructing a collaboration set in the embodiment of the present invention includes:
  • the UE acquires DRS configuration information of a node that supports an on/off operation in the network.
  • the DRS configuration information includes a type of the DRS signal, a transmission period of the DRS signal, and offset information of the DRS signal.
  • the DRS configuration information of the node that supports the on/off operation in the network includes:
  • the UE directly obtains pre-defined DRS configuration information, that is, directly obtains a standard protocol specification.
  • the DRS configuration information used in the on/off scenario or the notification information of the serving base station corresponding to the UE is used to obtain the DRS configuration information of the node supporting the on/off operation in the network.
  • the UE monitors, according to the DRS configuration information, a DRS sent by a neighboring base station in an off state.
  • the pilot signal used for measurement includes a discovery signal DRS;
  • the DRS may be a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a CRS, or a channel state reference signal.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS CRS
  • channel state reference signal Channel-State Information Reference signal
  • the UE monitors a CRS sent by the neighboring base station in the on state.
  • the neighboring base station In the on state, the neighboring base station sends a CRS every subframe. When it is in the off state, the neighboring base station sends a Discovery Reference Signal (DRS) at a large periodic interval (for example, 20 ms).
  • DRS may be the primary synchronization signal ( Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), CRS, or Channel-State Information Reference Signal (CSI-RS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Channel-State Information Reference Signal
  • CSI-RS Channel-State Information Reference Signal
  • the UE may perform the CSR time-frequency position in other N subframes in other cells; for DRS monitoring, the UE may send the DRS in each surrounding neighbor base station within the N maximum DRS period durations. On the sub-frame.
  • the maximum DRS period is the maximum value in the DRS period of each neighbor base station around the wireless node.
  • the UE determines, according to the monitored DRS and the CRS, an RSRP value of each neighboring base station of the wireless node.
  • the RSRP value of the neighbor base station in the off state of the neighboring base station of the UE may be determined according to the DRS, according to The CRS may determine an RSRP value of a neighbor base station in an on state in the neighbor base station of the UE.
  • the UE selects, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold.
  • the UE sends the information of the cooperation set to the serving base station of the UE, so that the serving base station establishes a coordinated base station set according to the information of the cooperation set.
  • the serving base station of the UE notifies the information of the cooperation set to the M bases in the cooperation set respectively
  • the way to stand can be:
  • the serving base station transmits the cooperative base station ID information of the own base station to the central control node, and the central control node notifies each coordinated base station.
  • the cooperative base station (for example, Node 1) confirms that the cooperation set can be joined, the acknowledgment message is fed back to the central control node, and the serving base station receives the feedback confirmation message of the coordinated base station sent by the central control node, and joins the cooperative base station that has fed back the acknowledgment message.
  • a list of cooperative base stations of the UE establishing a set of cooperative base stations. For example, after receiving the acknowledgment information of the Node 1, the central control node feeds back to the serving base station Node 0 that the Node 1 confirms the information of joining the cooperation set, and after receiving the acknowledgment message of the Node 1 sent by the central control node, the Node 0 lists the Node 1 column. Enter the list of cooperative base stations of the UE.
  • the serving base station transmits information requesting to join the cooperation set to each coordinated base station through an information exchange interface with the cooperative base station, for example, an X2 interface.
  • the cooperative base station for example, Node 1
  • the acknowledgement message is fed back through the information exchange interface with the serving base station, and the cooperative base station is included in the coordinated base station list of the UE.
  • the serving base station (Node 0) includes the Node 1 in the coordinated base station list of the UE.
  • the information of the cooperation set includes base station identification information and load information of each coordinated base station, and the UE sends the information of the cooperation set to a serving base station of the UE, so that the serving base station according to the The information of the collaborative set establishes a set of cooperative base stations.
  • the base station periodically listens to the pilot signal sent by the neighboring base station for measurement; when the cooperative base station in the coordinated base station set no longer satisfies the cooperation condition, for example, Some cooperative base stations reduce the RSRP value of the measured pilot signal due to changes in power or channel conditions, fail to meet the requirements of cooperation, and delete the cooperative base station from the cooperative base station list; when there is a new base station
  • the cooperation condition is met, that is, when the RSRP value of the new base station detected by the DRS or the CRS meets the requirement
  • the wireless node re-determines the RSRP value of each neighbor base station according to the pilot signal, and according to the RSRP of each neighbor base station. The value re-establishes the set of cooperative base stations.
  • the wireless node when the wireless node is a UE, the UE periodically monitors the CRS/DRS of the surrounding base station, and when it is found that the base station in the coordinated base station list of the UE no longer satisfies the cooperation condition, the UE is The serving base station Node 0 reports the information, and after receiving the information, the Node 0 deletes the cooperative base station from the coordinated base station list of the UE 0.
  • Steps 504-506 are repeatedly performed to join the base station to the coordinated base station list of the UE.
  • an embodiment of a method for constructing a collaboration set in the embodiment of the present invention includes:
  • the serving base station receives information about a collaboration set sent by the user equipment UE, where the information of the cooperation set includes base station identification information of each coordinated base station.
  • the serving base station sends signaling requesting to join the cooperation set to each coordinated base station according to the base station identification information of each coordinated base station, so that each coordinated base station sends a feedback acknowledgement message to the serving base station when confirming joining the cooperation set. ;
  • the serving base station sends signaling requesting to join the cooperative set to each coordinated base station by using the central control node according to the base station identification information of each coordinated base station; the serving base station may also directly communicate with the cooperative base station through an interaction interface.
  • the X2 interface sends signaling to the cooperative base station to join the cooperation set, which is not limited herein.
  • the serving base station receives the feedback confirmation message of the coordinated base station, and adds the base station that has fed back the acknowledgement message to the coordinated base station list of the UE, and establishes a coordinated base station set.
  • the serving base station may receive the feedback confirmation message of the cooperative base station through the central control node, or may directly receive the feedback confirmation message of the cooperative base station through an interaction interface with the cooperative base station, such as an X2 interface, where Not limited.
  • an embodiment of the wireless node 700 in the embodiment of the present invention includes:
  • the first determining unit 701 is configured to monitor a pilot signal sent by the neighboring base station for measurement, and determine a reference signal received power RSRP value of each neighboring base station;
  • the selecting unit 702 is configured to select, according to the RSRP value of each neighboring base station, the M base stations with the highest RSRP value to join the cooperation set in the neighboring base station whose RSRP value exceeds the predetermined power threshold;
  • the second determining unit 703 is configured to notify the target base station of the information of the cooperation set to determine a coordinated base station set of the wireless node.
  • the wireless node may further include:
  • the obtaining unit 704 is configured to acquire discovery signal DRS configuration information of a node supporting an on/off operation in the network, where the wireless node monitors a pilot signal for measurement sent by the neighboring base station, where the DRS configuration information includes a type of the DRS signal. The transmission period of the DRS signal and the offset information of the DRS signal.
  • the pilot signal used for measurement further includes a common reference signal CRS;
  • the first determining unit 701 is specifically configured to: according to the DRS configuration information, listen to a DRS sent by a neighboring base station in an off state; listen to a CRS sent by a neighboring base station in an on state; according to the monitored DRS and CRS, Determining an RSRP value of each neighboring base station of the wireless node.
  • the acquiring unit is specifically configured to directly obtain the predefined DRS configuration information, that is, directly obtain the DRS configuration information used in the on/off scenario specified in the standard protocol, or Obtaining, by the backhaul link, the DRS configuration information of the node supporting the on/off operation in the network from the central control node, or acquiring the node supporting the on/off operation in the network by the information interface with the base station supporting the adjacent operation of the on/off operation DRS configuration information.
  • the acquiring unit is specifically configured to directly obtain the predefined DRS configuration information, that is, directly obtain the DRS configuration information used in the on/off scenario specified in the standard protocol. Or obtaining the DRS configuration information of the node supporting the on/off operation in the network by using the notification information of the serving base station corresponding to the UE.
  • the second determining unit 703 is specifically configured to separately notify the M base stations in the cooperation set by the information of the cooperation set, so that each coordinated base station confirms joining. Sending a feedback confirmation message to the base station, where the cooperation set information includes base station identification information of each coordinated base station, load information, and signaling requesting to join the cooperation set;
  • the second determining unit 703 is further configured to receive a feedback acknowledgement message of the cooperative base station, and join the coordinated base station that has fed back the acknowledgement message to the cooperative base station list of the base station to establish a coordinated base station set.
  • the second determining unit 703 is specifically configured to send the information of the cooperation set to a serving base station of the UE, so that the serving base station is configured according to the collaboration
  • the information establishes a set of coordinated base stations, and the information of the cooperation set includes base station identification information of each coordinated base station and load information of each coordinated base station.
  • an embodiment of the serving base station 800 in the embodiment of the present invention includes:
  • the receiving unit 801 is configured to receive information about a collaboration set sent by the user equipment UE, where the information of the cooperation set includes base station identification information of each coordinated base station;
  • the sending unit 802 is configured to send, according to the base station identification information of each coordinated base station, signaling to join the cooperation set to each coordinated base station, so that each coordinated base station confirms joining the cooperation set. Sending a feedback confirmation message to the serving base station;
  • the receiving unit 801 is further configured to receive a feedback acknowledgement message of the coordinated base station, and join the base station that has fed back the acknowledgement message to the coordinated base station list of the UE to establish a coordinated base station set.
  • the sending unit 802 is specifically configured to: according to the base station identifier information of each coordinated base station, send, by using a central control node, signaling to join the coordinated set to each coordinated base station;
  • the receiving unit 801 is specifically configured to receive, by using the central control node, a feedback confirmation message of the coordinated base station.
  • 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.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明实施例公开了一种构建协作集合的方法、无线节点及服务基站，本发明方法包括：无线节点监听邻居基站发送的用于测量的导频，确定各邻居基站的参考信号接收功率RSRP值；无线节点根据各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；无线节点将协作集合的信息通知目标基站，以确定无线节点的协作基站集合。本发明的方法可以适应小基站on/off场景下构建协作集合，且灵活性高，性能增益大。

Description

一种构建协作集合的方法、无线节点及服务基站
本申请要求于2015年03月23日提交中国专利局，申请号为201510129262.2、发明名称为“一种构建协作集合的方法、无线节点及服务基站”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通讯技术领域，特别涉及一种构建协作集合的方法、无线节点及服务基站。
背景技术
在目前的无线通信系统中，为了进一步的提高网络中的容量，基站的小型化和网络节点的密集化已经成为了必然的选择。未来甚至出现超密集网络(Ultra Density Network，UDN)部署，例如在一个宏站覆盖范围内部署上百个小基站，在UDN网络中，由于小基站数量众多，对某个小基站而言，干扰源较多，多个基站进行协作可以有效的降低网络中的干扰水平，并提升用户数据速率，协作集合的建立是多基站进行协作的首要步骤。
当前建立协作集合的主要方式分如下两种：
一种是固定协作集合划分，即由网络端预先将某些基站划分为一个固定的协作集合，这种固定协作集合划分的方式实现虽然较为简单，但灵活性低，性能增益有限，也不能适应未来小基站部署随机变动的情况；
另一种是由用户设备(User Equipment，UE)专属协作集合划分，即由UE根据公共参考信号(Cell-specific Reference signal，CRS)测量服务小区及相邻小区参考信号接收功率(Reference Signal Received Power，RSRP)值，确定本UE专属的协作集合，并上报给服务基站。
这种UE专属的协作集合划分方式灵活性好，性能增益较高，但没有考虑到未来高密度网络中可能存在的小基站on/off场景，小基站on/off场景即小基站采用on/off策略降低网络干扰并降低网络能耗，具体的，在本小区中没有用 户或者业务量很少时，小基站暂时关闭，处于off状态；当有较多用户接入或业务量较大时，小基站开启，由off状态转换为on状态。在on/off场景中，节点可能快速的开关，开关状态持续时间从几毫秒到上千毫秒不等。与在on状态下小基站每子帧都会发送CRS不同，在处于off状态时，小基站会以较大的周期间隔(例如20ms)发送发现信号(Discovery Reference Signal，DRS)，DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)，若相邻的基站正处于off状态，UE可能在规定的测量时间内无法接收到相邻基站CRS，导致不能获得相邻基站的RSRP，从而影响协作集合的建立。
上述两种协作集合的建立方式，都有其应用局限性，无法既满足未来小基站部署随机变动的情况下协作集合的建立，又满足小基站on/off场景下协作集合的建立。
发明内容
本发明实施例提供了一种构建协作集合的方法、无线节点及服务基站，能适应小基站on/off场景下构建协作集合，且灵活性高，性能增益大。
本发明实施例第一方面提供了一种构建协作集合的方法，包括：
所述无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
所述无线节点根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
所述无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
本发明实施例第二方面提供了一种构建协作集合的方法，包括：
服务基站接收用户设备UE发送的协作集合的信息，所述协作集合的信息包括各协作基站的基站标识信息；
所述服务基站根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令，以使得各协作基站在确认加入所述协作集合时发送反 馈确认消息至所述服务基站；
所述服务基站接收协作基站的反馈确认消息，并将已反馈确认消息的基站加入所述UE的协作基站列表，建立协作基站集合。
本发明实施例第三方面提供了一种无线节点，包括：
第一确定单元，用于监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
选取单元，用于根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
第二确定单元，用于将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
本发明实施例第四方面提供了一种服务基站，包括：
接收单元，用于接收用户设备UE发送的协作集合的信息，所述协作集合的信息包括各协作基站的基站标识信息；
发送单元，用于根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述服务基站；
所述接收单元还用于接收协作基站的反馈确认消息，并将已反馈确认消息的基站加入所述UE的协作基站列表，建立协作基站集合。
从以上技术方案可以看出，本发明实施例具有以下优点：
本发明实施例中无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值，根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。本发明实施例能适应小基站on/off场景下构建协作集合，且灵活性高，性能增益大。
附图说明
图1是本发明实施例中构建协作集合的方法的一个实施例示意图；
图2是本发明实施例中构建协作集合的方法的另一个实施例示意图；
图3是本发明实施例中构建协作集合的方法的另一个实施例示意图；
图4是本发明实施例中构建协作集合的方法的另一个实施例示意图；
图5是本发明实施例中构建协作集合的方法的另一个实施例示意图；
图6是本发明实施例中构建协作集合的方法的另一个实施例示意图；
图7是本发明实施例中无线节点的一个实施例示意图；
图8是本发明实施例中服务基站的一个实施例示意图。
具体实施方式
本发明实施例提供了一种构建协作集合的方法、无线节点及服务基站，能适应小基站on/off场景下构建协作集合，且灵活性高，性能增益大。
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
请参阅图1，本发明实施例中构建协作集合的方法的一个实施例包括：
101、无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
本实施例中，所述用于测量的导频信号可以包括发现信号DRS，无线节点监听邻居基站发送的DRS，可以基于预先获取的DRS配置信息监听，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置 信息；DRS可能为主同步信号PSS、副同步信号SSS、CRS或信道状态参考信号CSI-RS等，此处不作限定。
所述用于测量的导频信号还可以是包括CRS和DRS，即无线节点监听处在off状态下邻居基站发送的DRS，并监听处在on状态下邻居基站发送的CRS。
本实施例中，无线节点可以是基站或用户设备等各种无线设备，此处不作限定。
当所述无线节点为基站时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述基站直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过回程链路(backhaul链路，是指从接入网络或者小区站点(cellsite)到交换中心的连接)从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口获取网络中支持on/off操作的节点的DRS配置信息。例如，若标准协议中规定了若干种DRS信号的种类/发送周期和偏置的组合，则基站可以采用盲检测的方式获取以上DRS配置信息。
当所述无线节点为用户设备UE时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述UE直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过所述UE对应的服务基站的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。例如UE通过服务基站发送的RRC信令获取网络中支持on/off操作的节点的DRS配置信息。
102、无线节点根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
103、无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
本实施例中，所述协作集合的信息可以包括各协作基站的基站标识信息和各协作基站的负载信息，此处不作限定；无线节点将所述协作集合的信息通知 目标基站，通过与目标基站的交互，以确定无线节点的协作集合。
本发明实施例中无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值，根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。本发明实施例能适应小基站on/off场景下构建协作集合，且灵活性高，性能增益大。
图1所示的实施例中，在所述无线节点监听邻居基站发送的用于测量的导频信号之前，所述无线节点可以先获取网络中支持on/off操作的节点的DRS配置信息，请参阅图2，本发明实施例中构建协作集合的方法的一个实施例包括：
201、无线节点获取网络中支持on/off操作的节点的DRS配置信息；
本实施例中，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
本实施例中，无线节点可以是基站或用户设备等各种无线设备，此处不作限定。
当所述无线节点为基站时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述基站直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过回程链路从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口(可以是有线接口或无线接口)获取网络中支持on/off操作的节点的DRS配置信息。例如，若标准协议中规定了若干种DRS信号的种类/发送周期和偏置的组合，则基站可以采用盲检测的方式获取以上DRS配置信息。
当所述无线节点为用户设备UE时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述UE直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过所述UE对应的服务基站 的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。例如UE通过服务基站发送的RRC信令获取网络中支持on/off操作的节点的DRS配置信息。
202、无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
本实施例中，所述用于测量的导频信号可以包括发现信号DRS；DRS可能为主同步信号PSS、副同步信号SSS、CRS或信道状态参考信号CSI-RS等，此处不作限定。所述用于测量的导频信号还可以是包括CRS和DRS，无线节点监听处在off状态下邻居基站发送的DRS，并监听处在on状态下邻居基站发送的CRS。
203、无线节点根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
204、无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
本实施例中，所述协作集合的信息可以包括各协作基站的基站标识信息和各协作基站的负载信息，此处不作限定；无线节点将所述协作集合的信息通知目标基站，通过与目标基站的交互，以确定无线节点的协作集合。
图1、图2所示的实施例中，所述用于测量的导频信号可以同时包括公共参考信号CRS和DRS，所述无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的RSRP值包括：所述无线节点根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；所述无线节点监听处在on状态下邻居基站发送的CRS；所述无线节点根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值。请参阅图3，本发明实施例中构建协作集合的方法的一个实施例包括：
301、无线节点获取网络中支持on/off操作的节点的DRS配置信息；
本实施例中，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
本实施例中，无线节点可以是基站或用户设备等各种无线设备，此处不作限定。
当所述无线节点为基站时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述基站直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过回程链路从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口(可以是有线接口或无线接口)获取网络中支持on/off操作的节点的DRS配置信息。例如，若标准协议中规定了若干种DRS信号的种类/发送周期和偏置的组合，则基站可以采用盲检测的方式获取以上DRS配置信息。
当所述无线节点为用户设备UE时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述UE直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过所述UE对应的服务基站的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。例如UE通过服务基站发送的RRC信令获取网络中支持on/off操作的节点的DRS配置信息。
302、无线节点根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；
本实施例中，所述用于测量的导频信号包括发现信号DRS；DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)，此处不作限定。
303、无线节点监听处在on状态下邻居基站发送的CRS；
在on状态下邻居基站每子帧都会发送CRS，在处于off状态时，邻居基站会以较大的周期间隔(例如20ms)发送发现信号(Discovery Reference Signal，DRS)，DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)。
对于CRS的监听，无线节点可以在任意N个子帧，在其他小区发送CRS 的时频位置进行；对于DRS的监听，无线节点可以在N个最大DRS周期时长内，在周围各个邻居基站发送DRS的子帧上进行。最大DRS周期是无线节点周围各个邻居基站的DRS周期中的最大值。
304、无线节点根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值；
根据标准协议上定义的RSRP的计算公式，即根据接收到的导频信息的功率作为无线节点的RSRP，因此，根据DRS可以确定无线节点的邻居基站中off状态下的邻居基站的RSRP值，根据CRS可以确定无线节点的邻居基站中on状态下的邻居基站的RSRP值。
305、无线节点根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
306、无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
本实施例中，所述协作集合的信息包括各协作基站的基站标识信息和各协作基站的负载信息，无线节点将所述协作集合的信息通知目标基站，通过与目标基站的交互，以确定无线节点的协作集合。
图1至图3中所述无线节点可以是基站，也可以是用户设备UE，下面结合具体实施例作出详细介绍，请参阅图4，本发明实施例中构建协作集合的方法的一个实施例包括：
401、基站获取网络中支持on/off操作的节点的DRS配置信息；
本实施例中，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
本实施例中，所述基站获取网络中支持on/off操作的节点的DRS配置信息可以包括：
所述基站直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过回程链路从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口(可以是有线接口或无线接口)获取网络中支持on/off操作的节点的DRS配置信息。例如，若标准协议中规定了若干种DRS 信号的种类/发送周期和偏置的组合，则基站可以采用盲检测的方式获取以上DRS配置信息。
402、基站根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；
本实施例中，所述用于测量的导频信号包括发现信号DRS；DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)，此处不作限定。
403、基站监听处在on状态下邻居基站发送的CRS；
在on状态下邻居基站每子帧都会发送CRS，在处于off状态时，邻居基站会以较大的周期间隔(例如20ms)发送发现信号(Discovery Reference Signal，DRS)，DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)。
对于CRS的监听，所述基站可以在任意N个子帧，在其他小区发送CRS的时频位置进行；对于DRS的监听，所述基站可以在N个最大DRS周期时长内，在周围各个邻居基站发送DRS的子帧上进行。最大DRS周期是无线节点周围各个邻居基站的DRS周期中的最大值。
404、基站根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值；
根据标准协议上定义的RSRP的计算公式，即根据接收到的导频信息的功率作为基站的RSRP，因此，根据DRS可以确定所述基站的邻居基站中off状态下的邻居基站的RSRP值，根据CRS可以确定所述基站的邻居基站中on状态下的邻居基站的RSRP值。
405、基站根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
406、基站将所述协作集合的信息分别通知所述协作集合内的M个基站，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述基站；
本实施例中，所述协作集合的信息包括各协作基站的基站标识信息和各协 作基站的负载信息，以及请求加入协作集合的信令。
基站将所述协作集合的信息分别通知所述协作集合内的M个基站的方式可以是：
(1)基站向中心控制节点发送本基站的协作基站ID信息，由中心控制节点通知各协作基站。
(2)基站通过与协作基站之间的信息交换接口，例如X2接口，向各协作基站发送请求加入协作集合的信息。
407、基站接收协作基站的反馈确认消息，并将已反馈确认消息的协作基站加入所述基站的协作基站列表，建立协作基站集合。
与406对应的，基站将所述协作集合的信息分别通知所述协作集合内的M个基站的两种方式，此处也不相同：
(1)当协作基站(例如，Node 1)确认可以加入该协作集合时，向中心控制节点反馈确认消息，基站接收中心控制节点发送的协作基站的反馈确认消息，并将已反馈确认消息的协作基站加入所述基站的协作基站列表，建立协作基站集合。例如中心控制节点收到Node 1的确认信息后，向Node 0反馈Node1确认加入该协作集合的信息，Node 0收到中心控制节点发来的Node 1的确认消息后，将Node 1列入到本基站(Node 0)的协作基站列表中。
(2)当协作基站(例如，Node 1)确认可以加入该协作集合时，通过与所述基站之间的信息交换接口反馈确认消息，同时将该协作基站列入本基站的协作基站列表中。例如基站(Node 0)收到协作基站(Node 1)的确认消息后，将Node 1列入到本基站(Node 0)的协作基站列表中。
下面介绍当无线节点为UE时的实施例，请参阅图5，本发明实施例中构建协作集合的方法的一个实施例包括：
501、UE获取网络中支持on/off操作的节点的DRS配置信息；
本实施例中，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
本实施例中，所述UE获取网络中支持on/off操作的节点的DRS配置信息包括：
所述UE直接获取预先定义的DRS配置信息，即直接获取标准协议中规 定的在on/off场景下使用的DRS配置信息，或通过所述UE对应的服务基站的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。
502、UE根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；
本实施例中，所述用于测量的导频信号包括发现信号DRS；DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)，此处不作限定。
503、UE监听处在on状态下邻居基站发送的CRS；
在on状态下邻居基站每子帧都会发送CRS，在处于off状态时，邻居基站会以较大的周期间隔(例如20ms)发送发现信号(Discovery Reference Signal，DRS)，DRS可能为主同步信号(Primary Synchronization Signal，PSS)、副同步信号(Secondary Synchronization Signal，SSS)、CRS或信道状态参考信号(Channel-State Information Reference signal，CSI-RS)等)。
对于CRS的监听，所述UE可以在任意N个子帧，在其他小区发送CRS的时频位置进行；对于DRS的监听，UE可以在N个最大DRS周期时长内，在周围各个邻居基站发送DRS的子帧上进行。最大DRS周期是无线节点周围各个邻居基站的DRS周期中的最大值。
504、UE根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值；
根据标准协议上定义的RSRP的计算公式，即根据接收到的导频信息的功率作为基站的RSRP，因此，根据DRS可以确定所述UE的邻居基站中off状态下的邻居基站的RSRP值，根据CRS可以确定所述UE的邻居基站中on状态下的邻居基站的RSRP值。
505、UE根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
506、UE将所述协作集合的信息发送给所述UE的服务基站，以使得所述服务基站根据所述协作集合的信息建立协作基站集合。
UE的服务基站将所述协作集合的信息分别通知所述协作集合内的M个基 站的方式可以是：
(1)服务基站向中心控制节点发送本基站的协作基站ID信息，由中心控制节点通知各协作基站。
当协作基站(例如，Node 1)确认可以加入该协作集合时，向中心控制节点反馈确认消息，服务基站接收中心控制节点发送的协作基站的反馈确认消息，并将已反馈确认消息的协作基站加入所述UE的协作基站列表，建立协作基站集合。例如中心控制节点收到Node 1的确认信息后，向服务基站Node 0反馈Node 1确认加入该协作集合的信息，Node 0收到中心控制节点发来的Node 1的确认消息后，将Node 1列入到UE的协作基站列表中。
(2)服务基站通过与协作基站之间的信息交换接口，例如X2接口，向各协作基站发送请求加入协作集合的信息。
当协作基站(例如，Node 1)确认可以加入该协作集合时，通过与服务基站之间的信息交换接口反馈确认消息，同时将该协作基站列入UE的协作基站列表中。例如服务基站(Node 0)收到协作基站(Node 1)的确认消息后，将Node 1列入到UE的协作基站列表中。
本实施例中，所述协作集合的信息包括各协作基站的基站标识信息及负载信息，所述UE将所述协作集合的信息发送给所述UE的服务基站，以使得所述服务基站根据所述协作集合的信息建立协作基站集合。
图1至图5所示的实施例中，所述基站周期性的监听邻居基站发送的用于测量的导频信号；当所述协作基站集合中的协作基站不再满足协作条件时，比如某些协作基站由于功率的变化或是信道条件的变化使得测量到的导频信号的RSRP值变小了，无法满足协作的要求，将该协作基站从所述协作基站列表删除；当存在新的基站满足协作条件时，即根据DRS或CRS检测到的新基站的RSRP值满足要求时，所述无线节点根据所述导频信号重新确定各邻居基站的RSRP值，并根据各邻居基站的所述RSRP值重新建立协作基站集合。
例如，当所述无线节点为UE时，UE周期性的对周围基站的CRS/DRS进行监听，当发现原来在UE的协作基站列表中的基站的不再满足协作条件时，向所述UE的服务基站Node 0上报该信息，Node 0在收到该信息后将该协作基站从UE 0的协作基站列表中删除。当发现有新的基站满足协作条件时， 重复执行步骤504-506，将该基站加入UE的协作基站列表中。
下面介绍从服务基站侧进行介绍，请参阅图6，本发明实施例中构建协作集合的方法的一个实施例包括：
601、服务基站接收用户设备UE发送的协作集合的信息，所述协作集合的信息包括各协作基站的基站标识信息；
602、服务基站根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述服务基站；
本实施例中，服务基站根据所述各协作基站的基站标识信息，通过中心控制节点向各协作基站发送请求加入协作集合的信令；服务基站也可以直接通过与协作基站之间的交互接口，如X2接口，向各协作基站发送请求加入协作集合的信令，此处不作限定。
603、服务基站接收协作基站的反馈确认消息，并将已反馈确认消息的基站加入所述UE的协作基站列表，建立协作基站集合。
与步骤602中对应，服务基站可以通过所述中心控制节点接收协作基站的反馈确认消息，也可以直接通过与协作基站之间的交互接口，如X2接口，接收协作基站的反馈确认消息，此处不作限定。
下面介绍本发明实施例中的无线节点的实施例，请参阅图7，本发明实施例中的无线节点700的一个实施例包括：
第一确定单元701，用于监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
选取单元702，用于根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
第二确定单703，用于将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
可选的，所述无线节点还可以包括：
获取单元704，在所述无线节点监听邻居基站发送的用于测量的导频信号之前，获取网络中支持on/off操作的节点的发现信号DRS配置信息，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
可选的，所述用于测量的导频信号还包括公共参考信号CRS；
所述第一确定单元701具体用于根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；监听处在on状态下邻居基站发送的CRS；根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值。
可选的，当所述无线节点为基站时，所述获取单元具体用于直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过回程链路从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口获取网络中支持on/off操作的节点的DRS配置信息。
可选的，当所述无线节点为用户设备UE时，所述获取单元具体用于直接获取预先定义的DRS配置信息，即直接获取标准协议中规定的在on/off场景下使用的DRS配置信息，或通过所述UE对应的服务基站的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。
可选的，当所述无线节点为基站时，所述第二确定单元703具体用于将所述协作集合的信息分别通知所述协作集合内的M个基站，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述基站，所述协作集合的信息包括各协作基站的基站标识信息，负载信息以及请求加入协作集合的信令；
所述第二确定单元703还用于接收协作基站的反馈确认消息，并将已反馈确认消息的协作基站加入所述基站的协作基站列表，建立协作基站集合。
可选的，当所述无线节点为UE时，所述第二确定单元703具体用于将所述协作集合的信息发送给所述UE的服务基站，以使得所述服务基站根据所述协作集合的信息建立协作基站集合，所述协作集合的信息包括各协作基站的基站标识信息和各协作基站的负载信息。
下面介绍本发明实施例中的服务基站的实施例，请参阅图8，本发明实施例中的服务基站800一个实施例包括：
接收单元801，用于接收用户设备UE发送的协作集合的信息，所述协作集合的信息包括各协作基站的基站标识信息；
发送单元802，用于根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令，以使得各协作基站在确认加入所述协作集合时 发送反馈确认消息至所述服务基站；
所述接收单元801还用于接收协作基站的反馈确认消息，并将已反馈确认消息的基站加入所述UE的协作基站列表，建立协作基站集合。
可选的，所述发送单元802具体用于根据所述各协作基站的基站标识信息，通过中心控制节点向各协作基站发送请求加入协作集合的信令；
所述接收单元801具体用于通过所述中心控制节点接收协作基站的反馈确认消息。
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，在本发明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采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储 介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，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发明各实施例技术方案的精神和范围。

Claims (19)

  1. 一种构建协作集合的方法，其特征在于，所述方法包括：
    无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
    所述无线节点根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
    所述无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
  2. 根据权利要求1所述的方法，其特征在于，在所述无线节点监听邻居基站发送的用于测量的导频信号之前，所述方法还包括：
    所述无线节点获取网络中支持on/off操作的节点的DRS配置信息，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
  3. 根据权利要求2中所述的方法，其特征在于，所述用于测量的导频信号还包括公共参考信号CRS和发现信号DRS；
    所述无线节点监听邻居基站发送的用于测量的导频信号，确定各邻居基站的RSRP值包括：
    所述无线节点根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；
    所述无线节点监听处在on状态下邻居基站发送的CRS；
    所述无线节点根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值。
  4. 根据权利要求2或3所述的方法，其特征在于，当所述无线节点为基站时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息包括：
    所述基站直接获取预先定义的DRS配置信息，或通过回程链路从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口获取网络中支持on/off操作的节点的DRS配置信息。
  5. 根据权利要求2或3所述的方法，其特征在于，当所述无线节点为用 户设备UE时，所述无线节点获取网络中支持on/off操作的节点的DRS配置信息包括：
    所述UE直接获取预先定义的DRS配置信息，或通过所述UE对应的服务基站的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。
  6. 根据权利要求1至3中任一所述的方法，其特征在于，当所述无线节点为基站时，所述无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合包括：
    所述基站将所述协作集合的信息分别通知所述协作集合内的M个基站，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述基站，所述协作集合的信息包括各协作基站的基站标识信息，负载信息以及请求加入协作集合的信令；
    所述基站接收协作基站的反馈确认消息，并将已反馈确认消息的协作基站加入所述基站的协作基站列表，建立协作基站集合。
  7. 根据权利要求6所述的方法，其特征在于，所述基站将所述协作集合的信息分别通知所述协作集合内的M个基站包括：
    所述基站通过中心控制节点将所述协作集合的信息分别通知所述协作集合内的M个基站；
    所述基站接收各协作基站的反馈确认消息包括：
    所述基站通过所述中心控制节点接收各协作基站的反馈确认消息。
  8. 根据权利要求1至3中任一所述的方法，其特征在于，当所述无线节点为UE时，所述无线节点将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合包括：
    所述UE将所述协作集合的信息发送给所述UE的服务基站，以使得所述服务基站根据所述协作集合的信息建立协作基站集合，所述协作集合的信息包括各协作基站的基站标识信息和各协作基站的负载信息。
  9. 一种构建协作集合的方法，其特征在于，包括：
    服务基站接收用户设备UE发送的协作集合的信息，所述协作集合的信息包括各协作基站的基站标识信息；
    所述服务基站根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令，以使得各协作基站在确认加入所述协作集合时发送反 馈确认消息至所述服务基站；
    所述服务基站接收协作基站的反馈确认消息，并将已反馈确认消息的基站加入所述UE的协作基站列表，建立协作基站集合。
  10. 根据权利要求9所述的方法，其特征在于，所述服务基站根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令包括：
    所述服务基站根据所述各协作基站的基站标识信息，通过中心控制节点向各协作基站发送请求加入协作集合的信令；
    所述服务基站接收协作基站的反馈确认消息包括：
    所述服务基站通过所述中心控制节点接收协作基站的反馈确认消息。
  11. 一种无线节点，其特征在于，包括：
    第一确定单元，用于监听邻居基站发送的用于测量的导频信号，确定各邻居基站的参考信号接收功率RSRP值；
    选取单元，用于根据所述各邻居基站的RSRP值，在RSRP值超过预定功率门限的邻居基站中，选取RSRP值最高的M个基站加入协作集合；
    第二确定单元，用于将所述协作集合的信息通知目标基站，以确定所述无线节点的协作基站集合。
  12. 根据权利要求11所述的无线节点，其特征在于，所述无线节点还包括：
    获取单元，在所述无线节点监听邻居基站发送的用于测量的导频信号之前，获取网络中支持on/off操作的节点的发现信号DRS配置信息，所述DRS配置信息包括DRS信号的种类、DRS信号的发送周期、DRS信号的偏置信息。
  13. 根据权利要求12所述的无线节点，其特征在于，所述用于测量的导频信号还包括公共参考信号CRS和发现信号DRS；
    所述第一确定单元具体用于根据所述DRS配置信息，监听处在off状态下邻居基站发送的DRS；监听处在on状态下邻居基站发送的CRS；根据所述监听的DRS和CRS，确定所述无线节点各邻居基站的RSRP值。
  14. 根据权利要求12或13所述的方法，其特征在于，当所述无线节点为基站时，所述获取单元具体用于直接获取预先定义的DRS配置信息，或通过回程链路从中心控制节点获取网络中支持on/off操作的节点的DRS配置信息，或通过与相邻支持操作on/off操作的基站的信息接口获取网络中支持on/off操 作的节点的DRS配置信息。
  15. 根据权利要求12或13所述的方法，其特征在于，当所述无线节点为用户设备UE时，所述获取单元具体用于直接获取预先定义的DRS配置信息，或通过所述UE对应的服务基站的通知信息，获取网络中支持on/off操作的节点的DRS配置信息。
  16. 根据权利要求11至13中任一所述的无线节点，其特征在于，当所述无线节点为基站时，所述第二确定单元具体用于将所述协作集合的信息分别通知所述协作集合内的M个基站，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述基站，所述协作集合的信息包括各协作基站的基站标识信息，负载信息以及请求加入协作集合的信令；
    所述第二确定单元还用于接收协作基站的反馈确认消息，并将已反馈确认消息的协作基站加入所述基站的协作基站列表，建立协作基站集合。
  17. 根据权利要求11至13中任一所述的无线节点，其特征在于，当所述无线节点为UE时，所述第二确定单元具体用于将所述协作集合的信息发送给所述UE的服务基站，以使得所述服务基站根据所述协作集合的信息建立协作基站集合，所述协作集合的信息包括各协作基站的基站标识信息和各协作基站的负载信息。
  18. 一种服务基站，其特征在于，包括：
    接收单元，用于接收用户设备UE发送的协作集合的信息，所述协作集合的信息包括各协作基站的基站标识信息；
    发送单元，用于根据所述各协作基站的基站标识信息，向各协作基站发送请求加入协作集合的信令，以使得各协作基站在确认加入所述协作集合时发送反馈确认消息至所述服务基站；
    所述接收单元还用于接收协作基站的反馈确认消息，并将已反馈确认消息的基站加入所述UE的协作基站列表，建立协作基站集合。
  19. 根据权利要求18所述的服务基站，其特征在于，所述发送单元具体用于根据所述各协作基站的基站标识信息，通过中心控制节点向各协作基站发送请求加入协作集合的信令；
    所述接收单元具体用于通过所述中心控制节点接收协作基站的反馈确认消息。
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