WO2014169795A1 - 一种进行CoMP传输的方法和设备 - Google Patents

一种进行CoMP传输的方法和设备 Download PDF

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Publication number
WO2014169795A1
WO2014169795A1 PCT/CN2014/075238 CN2014075238W WO2014169795A1 WO 2014169795 A1 WO2014169795 A1 WO 2014169795A1 CN 2014075238 W CN2014075238 W CN 2014075238W WO 2014169795 A1 WO2014169795 A1 WO 2014169795A1
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WIPO (PCT)
Prior art keywords
user equipment
base station
transmission
csi
hypothesis
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PCT/CN2014/075238
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English (en)
French (fr)
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倪浩
高秋彬
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H04J11/0053—Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception

Definitions

  • TECHNICAL FIELD The present application relates to the field of wireless communication technologies, and in particular, to a method and device for performing CoMP transmission.
  • a coordinated multi-point transmission technology is used ( Coordinated-multiple-point: CoMP ).
  • CoMP Coordinated-multiple-point
  • Cooperative multipoint transmission technology is a collaboration between geographically separated transmission points (TPs).
  • the network configures a measurement set for the user equipment, the measurement set containing one or more base stations.
  • the network configures one or more channel state information (CSI) processes for the user equipment for each base station in the measurement set.
  • the user equipment performs CSI reporting according to the configuration of each CSI process.
  • CSI channel state information
  • the base station needs to exchange a large amount of information and data with each other according to the scheduling process of the cooperative multi-point transmission reported by the user equipment CSI.
  • information and data interaction between base stations is implemented through a backhaul.
  • Backhaul's information transmission rate and transmission delay are determined by the physical shield and protocol stack delay of the physical link itself that implements backhaul. If the base stations are connected by a large physical link, such as a direct fiber connection, the backhaul has a high information transmission rate (such as Gbps). If the base stations are connected by a small physical link, such as a wireless transmission link, the backhaul has a low transmission rate (e.g., 1 Mbps or lower).
  • the downlink coordinated multi-point transmission is implemented, and depends on the CSI obtained by the base station to the cooperation points of the cooperation points.
  • the CSI includes a channel quality indicator (CQI), a precoding matrix indicator (PMI), and a rank indicator (RI).
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indicator
  • the user equipment measures the channel of the base station to the user equipment by using the downlink reference signal sent by each base station, and feeds back its measured channel information to its serving cell.
  • the serving cell of the user equipment receives the feedback CSI, performs cooperative scheduling and/or cooperative precoding with the coordinated cell, thereby implementing cooperative transmission.
  • the methods for cooperative scheduling and/or cooperative precoding scheduling in small intervals can be divided into two types: 1) non-central cooperative scheduling; 2) central cooperative scheduling.
  • Non-central scheduling has no central node for global optimization scheduling. In order to achieve the result of the global optimization, it may be necessary to use the method of iterative scheduling between the base stations.
  • the cooperative base station may need to perform multiple scheduling information interactions, as shown in FIG. 1A. Show. If the backhaul delay between the base stations is large, the non-central scheduling performs multiple scheduling information interactions, which may cause the scheduling delay to be too large, resulting in outdated channel information, thus affecting transmission performance.
  • the ideal backhaul is considered in the LTE-A version 11 CoMP study.
  • the main steps of the central scheduling include:
  • Each coordinated base station transmits all recently received user equipment CSIs accessing the base station to a central coordination node (CCN);
  • CCN central coordination node
  • the CCN centrally schedules time domain and frequency domain resources for user equipments of all cooperative base stations, and calculates precoding for user equipments that schedule time-frequency resources;
  • the CCN sends the scheduling and precoding result of each user equipment to each relevant base station;
  • the base station transmits data to the user equipment according to the received resource scheduling and precoding result.
  • the above-mentioned central scheduling method requires the cooperative base station to transmit the CSIs of all the user equipments that are accessed to the CCN, and after the CCN scheduling, all the scheduling results need to be transmitted to the base stations respectively, as shown in FIG. 2 Show.
  • the scheduling delay (each cooperative base station transmits CSI to the CCN until receiving the resource scheduling and precoding information transmitted by the CCN) is at least twice the backhaul transmission delay.
  • the scheduling delay in the cooperation set is twice the maximum backhaul transmission delay in the set.
  • the scheduling delay generated by the above-mentioned central scheduling procedure in the case of non-ideal backhaul is approximately 20ms. This means that each collaboration point in the collaboration set performs CoMP transmission based on the CSI reported by the user 20ms before.
  • CSI obsolescence problems can seriously affect CoMP transmission performance.
  • the impact of CSI obsolescence on transmission performance mainly includes three aspects: 1. Inaccurate resource scheduling; 2. Inadequate selection of precoding matrix; 3. Inaccurate link adaptation.
  • the current central scheduling method for coordinated multi-point transmission is designed for the ideal backhaul.
  • the backhaul transmission delay is very long, which makes the accuracy of precoding matrix selection and link adaptation seriously affected. , thereby seriously reducing CoMP transmission performance.
  • the present invention provides a method and apparatus for performing CoMP transmission, which is to solve the current central scheduling method for coordinated multi-point transmission existing in the prior art, which is designed for an ideal backhaul, and in the case of non-ideal backhaul due to backhaul transmission delay. It is very long, which makes the accuracy of precoding matrix selection and link adaptation seriously affected, which seriously reduces the problem of CoMP transmission performance.
  • the target base station receives CSIs of user equipments managed by other base stations and transmitted by other base stations; When the target base station needs to perform CoMP transmission for the user equipment, the target base station performs CoMP transmission for the user equipment according to the received CSI of the user equipment.
  • the target base station Before the target base station performs CoMP transmission for the user equipment according to the received CSI of the user equipment, according to the received scheduling information from the CCN, it is determined whether the user equipment needs to perform CoMP transmission.
  • the implementation manner in which the target base station performs CoMP transmission for the user equipment according to the received CSI of the user equipment may be, but is not limited to:
  • the target base station determines, according to the correspondence between the user equipment identifier and the transmission hypothesis set, the transmission hypothesis set corresponding to the user equipment identifier in the scheduling information received from the CCN, where the transmission hypothesis set includes multiple transmission hypotheses, and each transmission hypothesis includes Signal state information and interference state information, which is information indicating whether each base station that performs CoMP transmission for the user equipment transmits a useful signal to the user equipment, and the interference state information is expressed for each of the user equipments performing CoMP transmission. Whether each of the base stations generates interference information for the transmission of the user equipment; the target base station determines the transmission in the received scheduling information from the CCN according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis in the determined transmission hypothesis set.
  • the corresponding CSI is identified; or the signal state information and the interference state information are determined according to the received base station identifier and/or the interference base station identifier in the received scheduling information from the CCN, and are determined from the transmission hypothesis set corresponding to the user equipment identifier.
  • the transmission of the state information assumes that the CSI corresponding to the transmission hypothesis is determined according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis; the target base station performs CoMP for the user equipment on the scheduling resource indicated by the scheduling information according to the determined CSI. transmission.
  • the target base station can determine, but is not limited to, determining the correspondence between the transmission hypothesis identifier and the CSI according to the following manner:
  • the target base station determines the correspondence between the transmission hypothesis identifier and the CSI according to the received CSI and the transmission hypothesis identifier sent by other base stations;
  • the target base station determines the correspondence between the transmission hypothesis identifier and the CSI according to the correspondence between the CSI and the transmission hypothesis.
  • the target base station may, but is not limited to, determine the correspondence between the user equipment identity and the transmission hypothesis set according to the following manner:
  • the target base station determines a correspondence between the user equipment identifier and the transmission hypothesis set according to the received transmission hypothesis set and the user equipment identifier from other base stations or CCNs;
  • the target base station determines the correspondence between the user equipment identifier and the transmission hypothesis set according to the received transmission hypothesis set from the CCN and the user equipment identifier.
  • the target base station further sends the CSI of the user equipment to the cooperative base station of the user equipment managed by itself.
  • the target base station may, but is not limited to, transmitting the CSI of the user equipment to the cooperative base station of the user equipment managed by itself in the following manner:
  • the target base station sends the CSI of the user equipment managed by itself and the transmission hypothesis identifier of the transmission hypothesis corresponding to the CSI to the cooperative base station of the user equipment managed by itself.
  • the target base station also sends the transmission hypothesis set corresponding to the user equipment managed by itself and the user equipment identifier of the user equipment managed by itself to the cooperative base station and/or CCN of the user equipment managed by itself.
  • the CCN determines, according to the received CSI of the user equipment sent by the base station that manages the user equipment, a coordinated base station that needs to perform CoMP transmission for the user equipment;
  • the CCN notifies the determined cooperative base station, and the cooperative base station performs CoMP transmission for the user equipment according to the CSI of the user equipment that is sent by the base station that manages the user equipment.
  • the CCN can be, but is not limited to, the determined cooperative base station notified by:
  • the CCN sends the scheduling information of the transmission hypothesis identifier including the user equipment identifier and the transmission hypothesis corresponding to the scheduled transmission to the determined cooperative base station;
  • the CCN transmits the scheduling information including the user equipment identity and the transmission base station identity of the transmission base station and/or the interference base station identity of the interference base station determined according to the scheduled transmission to the determined cooperative base station.
  • the transmission hypothesis set includes a plurality of transmission hypotheses, each transmission hypothesis includes signal state information and interference state information, and the signal state information indicates whether each base station that performs CoMP transmission for the user equipment sends a useful signal to the user equipment.
  • the information, the interference state information is information indicating whether each base station performing CoMP transmission for the user equipment generates interference for the transmission of the user equipment.
  • a receiving module configured to receive CSIs of user equipments managed by other base stations and sent by other base stations;
  • a processing module configured to perform CoMP transmission on the user equipment according to the received CSI of the user equipment when performing CoMP transmission for the user equipment.
  • the processing module is specifically configured to: determine, according to the received scheduling information from the CCN, whether to perform CoMP transmission for the user equipment.
  • the processing module is further configured to: determine, according to the correspondence between the user equipment identifier and the transmission hypothesis set, the transmission hypothesis set corresponding to the user equipment identifier in the received scheduling information from the CCN, where the transmission hypothesis set includes multiple Transmission assumptions, each transmission hypothesis includes signal state information and interference state information, and the signal state information is information indicating whether each base station performing CoMP transmission for the user equipment transmits a useful signal to the user equipment, and the interference state information is representation Whether each base station performing CoMP transmission for the user equipment generates interference information for the transmission of the user equipment; determining the received CCN from the CCN according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis in the determined transmission hypothesis set The transmission hypothesis in the scheduling information identifies the corresponding CSI; or according to the received CCN The transmission base station identifier and/or the interference base station identifier in the scheduling information determines the signal status information and the interference status information, and determines, from the transmission hypothesis set corresponding to the user equipment identifier, the signal status information and
  • the processing module is specifically configured to: determine, according to the CSI and the transmission hypothesis identifier sent by the other base stations, the correspondence between the transmission hypothesis identifier and the CSI, and the management of the target base station.
  • a user equipment determines a correspondence between the transmission hypothesis identifier and the CSI according to the correspondence between the CSI and the transmission hypothesis.
  • the processing module is specifically configured to: determine, according to the received transmission hypothesis set and the user equipment identifier of the other base station or the CCN, a correspondence between the user equipment identifier and the transmission hypothesis set; A user equipment managed by the target base station determines a correspondence between the user equipment identifier and the transmission hypothesis set according to the received transmission hypothesis set from the CCN and the user equipment identifier.
  • the target base station further includes a sending module, configured to send the CSI of the user equipment to the cooperative base station of the user equipment that is managed by itself.
  • the sending module is specifically configured to: send the CSI of the user equipment that is managed by itself and the transmission hypothesis identifier of the transmission hypothesis corresponding to the CSI to the cooperative base station of the user equipment that is managed by itself.
  • the sending module is further configured to: send, to the cooperative base station and/or the CCN of the user equipment that is managed by itself, a transmission hypothesis set corresponding to the user equipment managed by the user equipment and a user equipment identifier of the user equipment that is managed by the user equipment.
  • another target base station for performing CoMP transmission according to the embodiment of the present invention includes:
  • a processor configured to execute a computer program having the following functions: receiving CSI of a user equipment managed by another base station transmitted by another base station; and performing CoMP transmission for the user equipment, according to the received CSI of the user equipment Performing a CoMP transmission for the user equipment;
  • a memory configured to hold code of the above computer program.
  • the functions performed by the processor executing the computer program described above may be implemented by a computer program executed by the processor and the baseband processor.
  • a determining module configured to determine, according to the received CSI of the user equipment sent by the base station of the management user equipment, a coordinated base station that needs to perform CoMP transmission for the user equipment;
  • the notification module is configured to notify the determined cooperative base station, and the coordinated base station performs CoMP transmission on the user equipment according to the received CSI of the user equipment that is sent by the base station that manages the user equipment.
  • the notification module is specifically configured to: And transmitting scheduling information including a transmission hypothesis identifier of the transmission hypothesis corresponding to the user equipment identifier and the scheduled transmission to the determined cooperative base station; or transmitting the base station identifier and/or the interference base station including the user equipment identifier and the transmission base station determined according to the scheduled transmission.
  • the scheduling information of the cryptographic base station identifier is sent to the determined cooperative base station;
  • the transmission hypothesis set includes a plurality of transmission hypotheses, each transmission hypothesis includes signal status information and interference state information, and the signal status information indicates whether each base station that performs CoMP transmission for the user equipment sends a useful signal to the user equipment.
  • the information, the interference state information is information indicating whether each base station performing CoMP transmission for the user equipment generates interference for the transmission of the user equipment.
  • another CCN for performing CoMP transmission includes:
  • a processor configured to: execute a computer program having the following functions: determining, according to the received CSI of the user equipment sent by the base station of the management user equipment, a cooperative base station that needs to perform CoMP transmission for the user equipment; notifying the determined cooperative base station, Performing CoMP transmission for the user equipment by the coordinated base station according to the CSI of the user equipment that is sent by the base station that manages the user equipment;
  • a memory configured to hold code of the above computer program.
  • the functions performed by the processor executing the computer program described above may be implemented by a computer program executed by the processor and the baseband processor.
  • the target base station performs CoMP transmission for the user equipment according to the CSI of the user equipment from other base stations, which reduces the influence on the accuracy of the precoding matrix selection and the link adaptation in the background art, and improves the impact.
  • CoMP transmission performance BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1A is a schematic diagram of information interaction of non-central scheduling in the background art
  • FIG. 1B is a schematic diagram of information interaction of a central scheduling in the background art
  • FIG. 2 is a schematic flowchart of a method for performing a CoMP transmission by a target base station according to an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a method for instructing a target base station to perform CoMP transmission according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of a system for performing CoMP transmission according to an embodiment of the present application
  • FIG. 5 is a schematic diagram of a target base station according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another target base station according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a CCN according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of another CCN provided by an embodiment of the present application.
  • the target base station performs CoMP transmission for the user equipment according to the CSI of the user equipment from other base stations.
  • the CSI of the received user equipment passes only one backhaul due to the CSI pair precoding matrix selection and link adaptation of the user equipment sent by the base station of the managed user equipment.
  • the target base station selects and adapts the precoding matrix according to the information of the CCN, and the information of the CCN is determined according to the CSI reported by other base stations, so that the information about the precoding matrix selection and the link adaptation is passed through two. Backhaul.
  • the embodiment of the present application reduces the delay of the information about the precoding matrix selection and the link adaptation, reduces the influence on the accuracy of the precoding matrix selection and the link adaptation, and improves the CoMP transmission performance. .
  • the method for performing a CoMP transmission by a target base station includes the following steps: Step 201: A target base station receives CSIs of user equipments managed by other base stations and sent by other base stations;
  • Step 202 When the target base station needs to perform CoMP transmission for the user equipment, perform the CoMP transmission for the user equipment according to the CSI of the user equipment sent by the base station of the received management user equipment.
  • the target device configures the information required for the measurement for the user equipment, and the user equipment performs the CSI or the information for determining the CSI according to the information required for the configuration measurement, and reports the information to the target base station. . In this way, the target base station obtains the CSI corresponding to each transmission hypothesis.
  • the target base station when the target base station performs CoMP transmission for the user equipment managed by other base stations, the target base station is a cooperative base station for user equipments managed by other base stations;
  • the target base station When the target base station performs CoMP transmission for the user equipment managed by itself, the target base station is a serving base station for the user equipment managed by itself.
  • the CSI includes but is not limited to some or all of the following information: precoding matrix, CQI and MCS information. Therefore, each base station needs to know the transmission hypothesis corresponding to the user equipment that can be coordinated.
  • the target base station determines, according to the received scheduling information from the CCN, whether to perform CoMP transmission for the user equipment. After determining the CoMP transmission for the user equipment, according to the CSI of the user equipment received last time, the precoding matrix selection, the link adaptation, the information about the precoding matrix selection and the link adaptation compared to the background art. After only one backhaul, the delay is shortened.
  • the target base station selects and adapts the precoding matrix according to the CSI of the user equipment that is determined last time.
  • a transmission hypothesis set may be configured for a base station, and each user equipment corresponds to a transmission hypothesis set.
  • the transmission hypothesis set includes a plurality of transmission hypotheses, each transmission hypothesis includes signal state information and interference state information, and the signal state information is each base station indicating that the user equipment performs CoMP transmission (including a base station for managing the user equipment, ie, Whether the serving base station and the cooperative base station of the user equipment respectively send information of the useful signal to the user equipment, and the interference state information is each base station (including the management user equipment) indicating that the user equipment performs CoMP transmission. Whether the base station, ie, the serving base station, and the cooperative base station of the user equipment) generate interference information for the transmission of the user equipment.
  • the interference state information indicates that a cooperative base station does not generate interference, it means that the base station may be a useful signal transmission point or the base station is muted or the base station performs cooperative precoding.
  • Table 1 gives an example of a transmission hypothesis convention for a user equipment including two base stations (the serving base station BS1, the cooperative base station BS2) in the transmission hypothesis set.
  • Table 2 gives an example of a transmission hypothesis convention for a user equipment including three base stations (the serving base station BS1, the cooperative base station BS2, and the cooperative base station BS3) in the transmission hypothesis set.
  • 'On' indicates that the interference is generated, and "Off" indicates that no interference has occurred.
  • the user equipment and the corresponding set of transmission hypotheses may be set in the protocol; or may be transmitted between the respective devices.
  • the base station may transmit the transmission hypothesis set of the user equipment managed by the user equipment and the corresponding user equipment identifier to the CCN and other base stations, that is, the target base station sends the self-managed user equipment to the cooperative base station and/or the CCN of the user equipment managed by the target base station.
  • the base station may also transmit the transmission hypothesis set of the user equipment managed by the base station and the corresponding user equipment identifier to the CCN, and then transmit the CCN to the other base station;
  • the transmission hypothesis set of each user equipment and the corresponding user equipment identifier are transmitted to each base station.
  • Each base station can determine the correspondence between the user equipment identity and the transmission hypothesis set after obtaining the transmission hypothesis set.
  • the method further includes:
  • the target base station determines a correspondence between the user equipment identifier and the transmission hypothesis set according to the received transmission hypothesis set and the user equipment identifier from other base stations or CCNs;
  • the target base station determines, according to the received transmission hypothesis set from the CCN and the user equipment identifier, the correspondence between the user equipment identifier and the transmission hypothesis set; If the target base station determines the transmission hypothesis set of the user equipment, the target base station itself can directly determine the correspondence between the transmission hypothesis set and the user equipment identifier.
  • the method further includes:
  • the target base station determines the correspondence between the transmission hypothesis identifier and the CSI according to the received CSI and the transmission hypothesis identifier sent by other base stations;
  • the target base station determines the correspondence between the transmission identifier and the CSI according to the correspondence between the CSI and the transmission hypothesis. Since the target base station can be known after determining the CSI, the correspondence between the CSI and the transmission support can directly determine the correspondence between the transmission hypothesis identifier and the CSI.
  • the target base station receives each transmission hypothesis identifier and corresponding CSI of each user equipment that is notified by the other base station, and reads and records information included in the CSI, and simultaneously covers information corresponding to the same transmission hypothesis identifier of the same user equipment that is currently recorded. .
  • the target base station After the user equipment reports the CSI to the target base station, the target base station receives the CSI of the user equipment, and may notify the CSI and the transmission hypothesis identifier corresponding to the CSI to other base stations and/or CCNs. Specifically, the target base station sends the CSI of the user equipment that it manages and the transmission hypothesis identifier of the transmission hypothesis corresponding to the CSI to the cooperative base station and/or CCN of the user equipment that it manages.
  • the transmission corresponding to the CSI is assumed to be the transmission hypothesis used by the user equipment managed by the target base station to measure the CSI.
  • the transmission corresponding to the CSI assumes the same signal and interference as the CSI.
  • the target base station determines, according to the CSI of the user equipment, a transmission hypothesis that the user equipment can support. For example, a user equipment supporting two transmission points is reported in the measurement set, and two CSIs are reported. One CSI corresponding transmission assumes that BS1 is a transmission point, BS2 is a interference point, and another CSI corresponding transmission assumes that BS2 is a transmission point. BS1 has no interference. According to Table 1, the target base station determines that the CSI of the user equipment corresponds to the transmission hypothesis 3, that is, the target base station uses the CSI as the CSI corresponding to the transmission hypothesis supported by the user equipment.
  • the role of the transmission hypothesis set in the embodiment of the present application is to establish a mapping relationship between transmission hypotheses and sequence numbers between all cooperating base stations (or also including CCN). It is convenient for the cooperative base station to receive the CSI sent by the serving base station to determine which transmission hypothesis corresponds to the CSI. The cooperative base station needs to use the CSI sent by the serving base station only when the CCN schedules the cooperative base station to transmit signals for the user equipment, that is, when the cooperative base station uses a certain CSI, it must be used as a signal transmission point, and those only correspond to The CSI of the serving base station as a transmission point does not need to be notified to the cooperative base station, and the transmission hypothesis of these CSIs is not necessary in the transmission hypothesis set.
  • the above-mentioned CSI corresponding transmission hypothesis is for a scheduling resource.
  • the target base station needs to determine the CSI corresponding to the transmission hypothesis supported by the user equipment on each scheduling resource.
  • the CSI and scheduling information of each resource may be the same or different.
  • the transmission hypothesis for the same user equipment is the same for each resource.
  • the target base station transmits the CSI and the transmission hypothesis identifier to the corresponding cooperative base station or CCN through the backhaul (here, the corresponding coordinated base station includes at least the interference state information and the base station indicating the signal state information as the transmission point).
  • the target base station may transmit the CSI together with the transmission hypothesis identifier, such as by dedicated signaling, broadcast messages, etc., or may be separately transmitted.
  • the target base station searches for the CSI corresponding to the transmission hypothesis identifier recorded by the target base station according to the scheduling information notified by the CCN on each scheduling resource, and determines the CSI as the transmission parameter on each scheduling resource, for the user equipment.
  • CoMP transmission
  • the target base station determines, according to the correspondence between the user equipment identifier and the transmission hypothesis set, the transmission hypothesis set corresponding to the user equipment identifier in the received scheduling information from the CCN;
  • the transmission base station identity and/or the interference base station identity determine the signal state information and the interference state information,
  • the transmission hypothesis including the signal state information and the interference state information is determined in the transmission hypothesis set corresponding to the user equipment identifier, and the CSI corresponding to the transmission hypothesis is determined according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis;
  • the target base station performs CoMP transmission for the user equipment on the scheduling resource indicated by the scheduling information according to the determined CSI.
  • the scheduling information may include, but is not limited to, some or all of the following information in addition to the information in the foregoing content:
  • the sequence number of all the resources scheduled (such as the PRB (physical resource block) sequence number), the size of the scheduled resource block, the sequence number of a resource in the scheduled resource block, and so on.
  • the CCN schedules a CoMP transmission of a CoMP user equipment in the cooperation set to the coordinated base station, and the CCN transmits the user equipment identifier and the transmission hypothesis identifier corresponding to the CoMP transmission to the cooperative base station. Or the user equipment identity and the transmission base station identification and/or the interference base station identification are transmitted to the cooperative base station;
  • the target base station receives the scheduling information including the user equipment identifier and the transmission hypothesis identifier notified by the CCN, determining the transmission hypothesis set corresponding to the user equipment identifier in the scheduling information, and determining the transmission hypothesis set in the transmission hypothesis
  • the transmission hypothesis in the received scheduling information identifies the CSI corresponding to the same transmission hypothesis identifier, and determines the CSI as the transmission parameter on each scheduling resource, and performs CoMP transmission for the user equipment.
  • the CCN notifies the transmission hypothesis 3 and the user equipment identity in the scheduling information to the target base station, and the target base station first determines the transmission hypothesis set according to the user equipment identity, that is, Table 1, and then transmits according to the transmission hypothesis set.
  • the assumed transmission hypothesis identifies the correspondence between the identity and the CSI, and determines the CSI corresponding to the transmission hypothesis 3 in the scheduling information.
  • the target base station receives the scheduling information including the user equipment identifier and the transmission base station identifier and/or the interference base station identifier notified by the CCN, according to the received transmission base station identifier in the scheduling information from the CCN.
  • the interference base station identifier determines the signal state information and the interference state information, and determines a transmission hypothesis set corresponding to the user equipment identifier in the scheduling information, and then determines, from the set of transmission hypotheses corresponding to the user equipment identifier, the determined signal state information and The transmission hypothesis of the interference state information, and determining the CSI corresponding to the transmission hypothesis according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis, and determining the CSI as the transmission parameter on each scheduling resource, and performing CoMP transmission for the user equipment. .
  • the transmission base station identifier when the signal state information and the interference state information are determined according to the received base station identifier and/or the interference base station identifier in the received scheduling information from the CCN, if the transmission base station identifier is received, it may be determined that the transmission is performed.
  • the base stations other than the base station corresponding to the base station identity do not participate in the transmission, that is, the other base stations except the indicated transmission base station are silent, and for the interference state information, all the base stations may be pre-set without any interference or all base stations have thousands. Disturbance
  • the base station that receives the received base station identifier determines that the base station is the only signal transmission base station of the user equipment by default;
  • the CCN places the transmission base station identity BS2 in the scheduling information and sends it to the target base station. If the target base station only receives the transmission base station identity, it determines that there is no interference base station identity, and the other base stations are non-transmission base stations.
  • the target base station first determines the transmission hypothesis set according to the user equipment identifier placed in the scheduling information, that is, Table 1, and then determines that the transmission hypothesis identifier is 3 according to the transmission base station identity BS2, the no-interference base station identifier, and other base stations are non-transport base stations. And then determining the CSI corresponding to the transmission hypothesis 3 according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis in the transmission hypothesis set.
  • base station 1 base station 2
  • base station 2 two base stations each having two user equipments
  • base station 1 under UE1 (CoMP user equipment, measurement set including base station 1 and base station 2), UE2
  • the base station 2 is under UE3 and UE4.
  • the above two base stations have one scheduling resource:
  • the base station 1 notifies the base station 2, the CCN, of the transmission hypothesis set of UE1, such as the content of Table 1.
  • UE1 in Table 1 represents base station 1
  • BS2 represents base station 2.
  • All user equipments report CSI, and each base station transmits the CSI of each user equipment to the CCN through backhaul; wherein the CSI report of UE1 includes the CSI supporting the transmission hypothesis 3 in Table 1.
  • the base station 1 determines the CSI corresponding to the transmission hypothesis 3 of the UE1, the identifier of the UE1, and the identifier of the transmission hypothesis 3, and notifies the base station 2 of the information together, and the base station 2 records the CSI corresponding to the transmission hypothesis 3 of the UE1.
  • the base station 1 transmits the CSI corresponding to the transmission hypothesis 3 and the identity of the UE1 to the CCN. Preferably, the identification of the hypothesis 3 can also be transmitted.
  • the CCN schedules according to the received information according to a certain time granularity period. Assume that the CCN schedules user transmissions for two base stations, schedules silence for base station 1, and schedules single-point transmission of UE1 for base station 2;
  • the CCN transmits information indicating silence to the base station 1; and transmits the identity of the UE1 and the identifier of the transmission hypothesis 3 to the base station 2.
  • Two base stations receive scheduling information:
  • the base station 1 does not transmit according to the silence information notified by the CCN;
  • the base station 2 determines that the UE1 is the target user equipment according to the user equipment identifier, determines the corresponding CSI according to the received transmission hypothesis identifier, and transmits data according to the CSI for the UE1.
  • the method for indicating that a target base station performs CoMP transmission by using a CCN includes the following steps:
  • Step 301 The CCN determines, according to the received CSI of the user equipment sent by the base station that manages the user equipment, a coordinated base station that needs to perform CoMP transmission for the user equipment.
  • Step 302 The CCN notifies the determined cooperative base station, and the coordinated base station performs CoMP transmission for the user equipment according to the received CSI of the user equipment sent by the serving base station.
  • the CCN sends the scheduling information of the transmission hypothesis identifier including the user equipment identifier and the transmission hypothesis corresponding to the scheduled transmission to the determined base station; or
  • the CCN sends, to the determined cooperative base station, the user equipment identifier and the scheduling information of the transmission base station identifier of the transmission base station and/or the interference base station identifier of the interference base station determined according to the scheduled transmission;
  • the transmission hypothesis set includes a plurality of transmission hypotheses, each transmission hypothesis includes signal state information and interference state information, and the signal state information is each base station indicating that the user equipment performs CoMP transmission (including a base station for managing the user equipment, ie, Whether the serving base station and the cooperative base station of the user equipment respectively send information of the useful signal to the user equipment, and the interference state information is each base station indicating that the user equipment performs CoMP transmission (including a base station for managing the user equipment, that is, the serving base station) And whether the cooperative base stations of the user equipment each generate information that is confusing to the transmission of the user equipment.
  • a system for performing CoMP transmission, a target base station, and a CCN are also provided in the embodiment of the present application. Since the principle of solving the problem is similar to the method in the embodiment of the present application, the implementation of the device may refer to the method. The implementation, the repetition will not be repeated.
  • the system for performing CoMP transmission in the embodiment of the present application includes: a CCN 40 and a target base station 41.
  • the CCN 40 is configured to determine, according to the received CSI of the user equipment sent by the base station that manages the user equipment, a coordinated base station that needs to perform CoMP transmission for the user equipment, notify the determined cooperative base station, and the coordinated base station is based on the received management user.
  • the CSI of the user equipment sent by the base station of the device performs CoMP transmission for the user equipment.
  • the target base station 41 is configured to receive CSI of the user equipment managed by the other base station and sent by the other base station; according to the received notification of the CCN 40, when the user equipment needs to perform CoMP transmission, according to the received base station of the management user equipment, The CSI of the user equipment performs CoMP transmission for the user equipment.
  • the target base station in this embodiment of the present application includes: a receiving module 500 and a processing module 510.
  • the receiving module 500 is configured to receive CSIs of user equipments managed by other base stations and sent by other base stations;
  • the processing module 510 is configured to perform CoMP transmission for the user equipment according to the received CSI of the user equipment sent by the base station of the management user equipment when performing CoMP transmission for the user equipment.
  • the processing module 510 determines, according to the received scheduling information from the central cooperative node CCN, whether to perform CoMP transmission for the user equipment.
  • the processing module 510 determines, according to the correspondence between the user equipment identifier and the transmission hypothesis set, the transmission hypothesis set corresponding to the user equipment identifier in the scheduling information received from the CCN, where the transmission hypothesis set includes multiple transmission hypotheses, Each transmission hypothesis includes signal state information and interference state information, and the signal state information is information indicating whether each base station that performs CoMP transmission for the user equipment transmits a useful signal to the user equipment, and the interference state information is represented as a user equipment.
  • each base station performing CoMP transmission generates interference information for the transmission of the user equipment; determining the received scheduling information from the CCN according to the correspondence between the transmission hypothesis identifier and the CSI of the transmission hypothesis in the determined transmission hypothesis set The transmission support identifier in the corresponding CSI; or #> according to the received adjustment from the CCN
  • the transmission base station identifier and/or the interference base station identifier in the degree information determine the signal state information and the interference state information, and determine a transmission hypothesis including the signal state information and the interference state information from the transmission hypothesis set corresponding to the user equipment identifier, according to the transmission And determining a CSI corresponding to the transmission hypothesis according to the corresponding relationship between the hypothetical transmission hypothesis identifier and the CSI; and performing CoMP transmission on the scheduling resource indicated by the scheduling information according to the determined CSI.
  • the processing module 510 determines, according to the received CSI and the transmission support identifiers of the other base stations, the correspondence between the transmission support identifier and the CSI, and one user equipment managed by the target base station. And determining a correspondence between the transmission hypothesis identifier and the CSI according to the correspondence between the CSI and the transmission hypothesis.
  • the processing module 510 determines, according to the received transmission hypothesis set and the user equipment identifier from other base stations or CCNs, a correspondence between the user equipment identifier and the transmission hypothesis set.
  • the processing module 510 determines, according to the received transmission hypothesis set and the user equipment identifier from the CCN, a correspondence between the user equipment identifier and the transmission hypothesis set for a user equipment managed by the target base station.
  • the target base station further includes: a sending module 520.
  • the sending module 520 is configured to send the CSI of the user equipment to the cooperative base station of the user equipment that is managed by itself.
  • the sending module 520 sends the CSI of the user equipment managed by itself and the transmission hypothesis identifier of the transmission hypothesis corresponding to the CSI to the cooperative base station of the user equipment managed by itself.
  • the sending module 520 sends the transmission hypothesis set corresponding to the user equipment managed by itself and the user equipment identifier of the user equipment managed by itself to the cooperative base station and/or the CCN of the user equipment managed by the UE.
  • the target base station 600 of another embodiment of the present application includes: a processor 610 and a memory 620.
  • the processor 610 is configured to execute a computer program having the following functions: receiving CSIs of user equipments managed by other base stations transmitted by other base stations; and transmitting, according to the received base station of the management user equipment, when performing CoMP transmission for the user equipments
  • the CSI of the user equipment performs CoMP transmission for the user equipment.
  • Memory 620 is configured to hold the code of the above computer program.
  • the functions performed by the processor executing the computer program described above may be implemented by a computer program executed by the processor and the baseband processor.
  • the CCN of the embodiment of the present application includes: a determining module 700 and a notification module 710.
  • a determining module 700 configured to determine, according to the CSI of the user equipment that is sent by the base station that manages the user equipment, a coordinated base station that needs to perform CoMP transmission for the user equipment;
  • the notification module 710 is configured to notify the determined cooperative base station, and the cooperative base station performs CoMP transmission for the user equipment according to the received CSI of the user equipment sent by the base station of the management user equipment.
  • the notification module 710 sends the scheduling information of the transmission hypothesis identifier including the user equipment identifier and the transmission hypothesis corresponding to the scheduling transmission to the determined cooperative base station; or the transmission base station that includes the user equipment identifier and the transmission base station determined according to the scheduled transmission.
  • the scheduling information of the identified and/or the interference base station identifier of the interference base station is sent to the determined cooperative base station;
  • the transmission hypothesis set includes a plurality of transmission hypotheses, each transmission hypothesis includes signal state information and interference state information, and the signal state information indicates whether each base station that performs CoMP transmission for the user equipment sends a useful signal to the user equipment.
  • the information, the interference state information is information indicating whether each base station performing CoMP transmission for the user equipment generates interference for the transmission of the user equipment.
  • the CCN 800 of another embodiment of the present application includes: a processor 810 and a memory 820.
  • the processor 810 is configured to execute a computer program that has the following functions: determining, according to the received CSI of the user equipment sent by the base station of the management user equipment, a cooperative base station that needs to perform CoMP transmission for the user equipment; And performing CoMP transmission by the coordinated base station according to the received CSI of the user equipment that is sent by the base station that manages the user equipment;
  • the memory 820 is configured to store code of the above computer program.
  • the functions performed by the processor executing the computer program described above may be implemented by a computer program executed by the processor and the baseband processor.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the application can be in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请实施例涉及无线通信技术领域，特别涉及一种进行CoMP传输的方法和设备，用以解决现有技术中存在的在非理想backhaul情况下由于backhaul传输时延很长，使得预编码矩阵选择、链路自适应的精确性受到严重影响，从而严重降低CoMP传输性能的问题。本申请实施例的方法包括：目标基站在需要为由其他基站管理的用户设备进行CoMP传输时，根据收到的其他基站发送的所述用户设备的所述CSI为所述用户设备进行CoMP传输。本申请实施例节省了时间，缩小了时延，降低了对预编码矩阵选择、链路自适应的精确性的影响，提高了CoMP传输性能。

Description

一种进行 CoMP传输的方法和设备 本申请要求在 2013年 4月 15日提交中国专利局、 申请号为 201310129935.5、 发明名称为
"一种进行 CoMP传输的方法和设备"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 本申请涉及无线通信技术领域， 特别涉及一种进行 CoMP传输的方法和设备。 背景技术 长期演进增强 （ long term evolution-advance: LTE-A ) 系统中， 为了减小小区覆盖边沿 用户设备的邻区千扰， 提高小区边沿用户设备的体验， 釆用了协作多点传输技术 ( coordinated-multiple-point: CoMP )。协作多点传输技术是在地理位置上分离的多个传输点 ( transmission point: TP )之间的协作。 为了实现对一个用户设备的 CoMP传输， 网络为用 户设备配置一个测量集合， 该测量集合中包含 1个或多个基站。 网络对测量集合中的每个 基站为用户设备配置 1个或多个信道状态信息（ channel state information: CSI )进程。 用户 设备根据每个 CSI进程配置进行 CSI上报。
基站根据用户设备 CSI上报进行协作多点传输的调度过程中需要相互交换大量的信息 和数据。 LTE系统中，基站之间的信息和数据交互通过回程链路（backhaul )实现。 Backhaul 的信息传输速率和传输延时由实现 backhaul的物理链路本身的性盾和协议栈时延决定。 若 基站之间通过容量大的物理链路连接， 如光纤直接连接， backhaul的信息传输速率高 （如 Gbps量级）。 若基站之间通过容量较小的物理链路连接， 如无线传输链路， backhaul的信 息传输速率低（如 1Mbps或更低）。
实现下行协作多点传输， 依赖于基站获得的用户设备到各协作点的 CSI。 CSI 包括信 道盾量 4旨示信息、 ( channel quality indicator: CQI )、预编码 巨阵 4旨示 ( precoding matrix indicator: PMI )和秩指示 （ rank indicator: RI )等。 用户设备利用各基站发送的下行参考信号测量基 站到用户设备的信道， 并向其服务小区 （serving cell )反馈其测量到的信道信息。 用户设 备的 serving cell接收反馈的 CSI, 与协作小区进行协作调度和 /或协作预编码， 从而实现协 作传输。 小区间进行协作调度和 /或协作预编码调度的方法可以分为两种： 1 ) 非中心协作 调度； 2 ) 中心协作调度。
非中心调度没有中心节点进行全局优化调度。 为了达到接近全局优化的结果， 可能需 要釆用基站间迭代调度的方法， 协作基站间可能需要进行多次调度信息交互， 如图 1A所 示。如果基站间 backhaul时延较大，非中心调度进行多次调度信息交互会使调度时延过大， 导致信道信息过时， 从而影响传输性能。
LTE-A版本 11的 CoMP研究中考虑了理想的 backhaul 在理想 backhaul情况下， 中 心调度（参见图 1B ) 的主要步骤包括：
1、 各协作基站把最近接收到的所有接入该基站的用户设备 CSI传输给一个中心协作 节点 ( central coordination node: CCN )；
2、 CCN为所有协作基站的用户设备集中调度时域和频域资源， 并为调度了时频资源 的用户设备计算预编码；
3、 CCN将每个用户设备的调度和预编码结果发送给每个相关基站；
4、 基站根据收到的资源调度和预编码结果为用户设备传输数据。
在非理想 backhaul情况下， 上述中心调度的方法需要协作基站把各自所有接入的用户 设备的 CSI都传输给 CCN, 且 CCN调度之后， 需要把所有调度结果分别传给各基站， 如 图 2所示。 调度时延（各协作基站向 CCN传输 CSI直到接收到 CCN发送的资源调度和预 编码信息） 至少为 2倍的 backhaul传输时延。 另外， 如果协作集合中 CCN到各协作基站 的 backhaul时延不同， 为了让一次调度结果在协作集合中同时应用， 协作集合中的调度时 延为集合中最大 backhaul传输时延的 2倍。 对于典型的 backhaul时延（ 10ms ), 上述中心 调度流程在非理想 backhaul情况下产生的调度时延大致为 20ms。 这意味着协作集合中各 协作点根据用户 20ms之前上报的 CSI进行 CoMP传输。 CSI过时问题会严重影响 CoMP 传输性能。 CSI过时问题对传输性能的影响主要包括 3个方面： 1、 资源调度不准确； 2、 预编码矩阵选择不合适； 3、 链路自适应不准确。
综上所述， 目前协作多点传输的中心调度方法是为理想 backhaul 设计， 在非理想 backhaul情况下由于 backhaul传输时延很长， 使得预编码矩阵选择、 链路自适应的精确性 受到严重影响， 从而严重降低 CoMP传输性能。 发明内容 本申请提供一种进行 CoMP传输的方法和设备， 用以解决现有技术中存在的目前协作 多点传输的中心调度方法是为理想 backhaul设计， 在非理想 backhaul情况下由于 backhaul 传输时延很长， 使得预编码矩阵选择、 链路自适应的精确性受到严重影响， 从而严重降低 CoMP传输性能的问题。
本申请实施例提供的一种进行 CoMP传输的方法， 包括：
目标基站接收其他基站发送的由其他基站管理的用户设备的 CSI; 该目标基站在需要为上述用户设备进行 CoMP传输时，根据收到的该用户设备的上述 CSI为该用户设备进行 CoMP传输。
较佳地， 目标基站根据收到的该用户设备的上述 CSI为该用户设备进行 CoMP传输 之前， 根据收到的来自 CCN的调度信息， 确定是否需要为该用户设备进行 CoMP传输。
进一步的， 目标基站根据收到的该用户设备的上述 CSI为该用户设备进行 CoMP传 输的实现方式可以但不仅限于是：
目标基站根据用户设备标识和传输假设集合的对应关系， 确定收到的来自 CCN的调 度信息中的用户设备标识对应的传输假设集合， 其中传输假设集合中包括多个传输假设， 每个传输假设包括信号状态信息和千扰状态信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否向该用户设备发送有用信号的信息， 千扰状态信息是表示 为用户设备进行 CoMP传输的每个基站各自是否对该用户设备的传输产生千扰的信息； 目标基站根据确定的传输假设集合中的传输假设的传输假设标识和 CSI的对应关系， 确定收到的来自 CCN的调度信息中的传输假设标识对应的 CSI; 或根据收到的来自 CCN 的调度信息中的传输基站标识和 /或千扰基站标识确定信号状态信息和千扰状态信息，从上 述用户设备标识对应的传输假设集合中确定包含上述信号状态信息和千扰状态信息的传 输假设，根据该传输假设的传输假设标识和 CSI的对应关系，确定该传输假设对应的 CSI; 目标基站根据确定的 CSI, 在上述调度信息指示的调度资源上为该用户设备进行 CoMP传输。
较佳地， 目标基站可以但不仅限于根据下列方式确定传输假设标识和 CSI的对应关 系：
针对其它基站管理的一个用户设备， 目标基站根据收到的其他基站发送的上述 CSI 和传输假设标识， 确定传输假设标识和 CSI的对应关系；
针对目标基站管理的一个用户设备， 目标基站根据 CSI和传输假设的对应关系，确定 传输假设标识和 CSI的对应关系。
较佳地， 目标基站可以但不仅限于根据下列方式确定用户设备标识和传输假设集合的 对应关系：
针对其它基站管理的一个用户设备， 目标基站根据收到的来自其他基站或 CCN的传 输假设集合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系；
针对目标基站管理的一个用户设备， 目标基站根据收到的来自 CCN的传输假设集合 和用户设备标识， 确定用户设备标识和传输假设集合的对应关系。
基于上述任意方法实施例，较佳地， 目标基站还向自身管理的用户设备的协作基站发 送该用户设备的 CSI。 目标基站可以但不仅限于釆用如下方式向自身管理的用户设备的协作基站发送该用 户设备的 CSI:
目标基站将自身管理的用户设备的 CSI和该 CSI对应的传输假设的传输假设标识发送 给自身管理的用户设备的协作基站。
较佳地， 目标基站还向自身管理的用户设备的协作基站和 /或 CCN发送自身管理的用 户设备对应的传输假设集合和自身管理的用户设备的用户设备标识。
本申请实施例提供的另一种进行 CoMP传输的方法， 包括：
CCN根据收到的管理用户设备的基站发送的该用户设备的 CSI,确定需要为该用户设 备进行 CoMP传输的协作基站；
所述 CCN通知确定的协作基站， 由协作基站根据收到的管理所述用户设备的基站发 送的所述用户设备的 CSI为所述用户设备进行 CoMP传输。
较佳地， CCN可以但不仅限于通过如下方式通知确定的协作基站：
CCN将包含用户设备标识和调度传输对应的传输假设的传输假设标识的调度信息发 送给确定的协作基站； 或
CCN将包含用户设备标识和根据调度传输确定的传输基站的传输基站标识和 /或千扰 基站的千扰基站标识的调度信息发送给确定的协作基站。
其中，传输假设集合中包括多个传输假设，每个传输假设包括信号状态信息和千扰状 态信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否向该用户设 备发送有用信号的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站各自 是否对该用户设备的传输产生千扰的信息。
本申请实施例提供的一种进行 CoMP传输的目标基站， 包括：
接收模块， 用于接收其他基站发送的由其他基站管理的用户设备的 CSI;
处理模块，用于在需要为所述用户设备进行 CoMP传输时，根据收到的所述用户设备 的所述 CSI为所述用户设备进行 CoMP传输。
较佳地， 处理模块具体用于： 根据收到的来自 CCN的调度信息， 确定是否需要为所 述用户设备进行 CoMP传输。
较佳地， 处理模块还用于： 根据用户设备标识和传输假设集合的对应关系， 确定收到 的来自 CCN的调度信息中的用户设备标识对应的传输假设集合， 其中传输假设集合中包 括多个传输假设， 每个传输假设包括信号状态信息和千扰状态信息， 信号状态信息是表示 为用户设备进行 CoMP传输的每个基站各自是否向该用户设备发送有用信号的信息， 千扰 状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否对该用户设备的传输产生 千扰的信息； 根据确定的传输假设集合中的传输假设的传输假设标识和 CSI的对应关系， 确定收到的来自 CCN的调度信息中的传输假设标识对应的 CSI; 或根据收到的来自 CCN 的调度信息中的传输基站标识和 /或千扰基站标识确定信号状态信息和千扰状态信息，从所 述用户设备标识对应的传输假设集合中确定包含所述信号状态信息和千扰状态信息的传 输假设， 根据所述传输假设的传输假设标识和 CSI的对应关系， 确定所述传输假设对应的 CSI;根据确定的 CSI,在所述调度信息指示的调度资源上为所述用户设备进行 CoMP传输。
较佳地， 处理模块具体用于： 针对其它基站管理的一个用户设备， 根据收到的其他基 站发送的所述 CSI和传输假设标识， 确定传输假设标识和 CSI的对应关系； 针对目标基站 管理的一个用户设备， 根据所述 CSI和传输假设的对应关系， 确定传输假设标识和 CSI的 对应关系。
较佳地， 处理模块具体用于： 针对其它基站管理的一个用户设备， 根据收到的来自其 他基站或 CCN的传输假设集合和用户设备标识， 确定用户设备标识和传输假设集合的对 应关系； 针对目标基站管理的一个用户设备， 根据收到的来自 CCN的传输假设集合和用 户设备标识， 确定用户设备标识和传输假设集合的对应关系。
基于上述任意目标基站实施例， 较佳地， 该目标基站还包括发送模块， 用于向自身管 理的用户设备的协作基站发送该用户设备的 CSI。
较佳地，发送模块具体用于：将自身管理的用户设备的 CSI和该 CSI对应的传输假设 的传输假设标识发送给自身管理的用户设备的协作基站。
较佳地， 发送模块还用于： 向自身管理的用户设备的协作基站和 /或 CCN发送自身管 理的用户设备对应的传输假设集合和自身管理的用户设备的用户设备标识。
基于与方法同样的发明构思，本发明实施例提供的另一种进行 CoMP传输的目标基站， 包括：
处理器，被配置为执行具备下列功能的计算机程序： 接收其他基站发送的由其他基站 管理的用户设备的 CSI; 在需要为该用户设备进行 CoMP传输时， 根据收到的该用户设备 的上述 CSI为该用户设备进行 CoMP传输；
存储器， 被配置为保存上述计算机程序的代码。
某些情况下，处理器执行上述计算机程序实现的功能可以由处理器和基带处理器执行 的计算机程序配合实现。
本申请实施例提供的一种进行 CoMP传输的 CCN, 包括：
确定模块， 用于根据收到的管理用户设备的基站发送的该用户设备的 CSI, 确定需要 为该用户设备进行 CoMP传输的协作基站；
通知模块， 用于通知确定的协作基站， 由协作基站根据收到的管理所述用户设备的基 站发送的所述用户设备的 CSI为所述用户设备进行 CoMP传输。
较佳地， 通知模块具体用于： 将包含用户设备标识和调度传输对应的传输假设的传输假设标识的调度信息发送给 确定的协作基站； 或将包含用户设备标识和根据调度传输确定的传输基站的传输基站标识 和 /或千扰基站的千扰基站标识的调度信息发送给确定的协作基站；
其中传输假设集合中包括多个传输假设， 每个传输假设包括信号状态信息和千扰状态 信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否向该用户设备 发送有用信号的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站各自是 否对该用户设备的传输产生千扰的信息。
基于与方法同样的发明构思， 本申请实施例提供的另一种进行 CoMP传输的 CCN, 包括：
处理器，被配置为执行具备下列功能的计算机程序： 根据收到的管理用户设备的基站 发送的该用户设备的 CSI, 确定需要为该用户设备进行 CoMP传输的协作基站； 通知确定 的协作基站， 由协作基站根据收到的管理所述用户设备的基站发送的所述用户设备的 CSI 为所述用户设备进行 CoMP传输；
存储器， 被配置为保存上述计算机程序的代码。
某些情况下，处理器执行上述计算机程序实现的功能可以由处理器和基带处理器执行 的计算机程序配合实现。
本申请实施例中， 目标基站根据来自其他基站的用户设备的 CSI 为该用户设备进行 CoMP传输， 相比背景技术中降低了对预编码矩阵选择、 链路自适应的精确性的影响， 提 高了 CoMP传输性能。 附图说明 图 1 A为背景技术中非中心调度的信息交互示意图；
图 1B为背景技术中中心调度的信息交互示意图；
图 2为本申请实施例目标基站进行 CoMP传输的方法流程示意图；
图 3为本申请实施例 CCN指示目标基站进行 CoMP传输的方法流程示意图； 图 4为本申请实施例进行 CoMP传输的系统示意图；
图 5为本申请实施例提供的一种目标基站的示意图；
图 6为本申请实施例提供的另一种目标基站的示意图；
图 7为本申请实施例提供的一种 CCN的示意图；
图 8为本申请实施例提供的另一种 CCN的示意图。 具体实施方式 本申请实施例中， 目标基站根据来自其他基站的用户设备的 CSI 为该用户设备进行 CoMP传输。 由于根据收到的管理用户设备的基站发送的该用户设备的 CSI对预编码矩阵 选择和链路自适应， 收到的用户设备的 CSI只经过一个 backhaul。 而背景技术中目标基站 根据 CCN的信息对预编码矩阵选择和链路自适应， CCN的信息是根据其他基站上报的 CSI 确定的， 这样对预编码矩阵选择和链路自适应的信息经过两个 backhaul。 本申请实施例相 比背景技术， 减少了对预编码矩阵选择和链路自适应的信息的时延， 降低了对预编码矩阵 选择、 链路自适应的精确性的影响， 提高了 CoMP传输性能。
如图 2所示， 本申请实施例目标基站进行 CoMP传输的方法包括下列步骤： 步骤 201、 目标基站接收其他基站发送的由其他基站管理的用户设备的 CSI;
步骤 202、 目标基站在需要为用户设备进行 CoMP传输时， 根据收到的管理用户设备 的基站发送的该用户设备的 CSI为用户设备进行 CoMP传输。
其中， 目标基站在需要确定 CSI时， 会针对不同的传输假设为用户设备配置测量需要 的信息， 用户设备根据配置测量需要的信息进行测量得到 CSI或用于确定 CSI的信息， 并 上报给目标基站。 这样目标基站就得到每个传输假设对应的 CSI。
在本申请实施例中， 目标基站为由其他基站管理的用户设备进行 CoMP传输时， 该目 标基站对于其他基站管理的用户设备来说是协作基站；
目标基站为由自身管理的用户设备进行 CoMP传输时， 该目标基站对于自身管理的用 户设备来说是服务基站。
由于协作基站需要根据 CCN选定的传输假设对应的 CSI, 为用户设备进行协作传输。 这里的 CSI包括但不限于下列信息中的部分或全部： 预编码矩阵、 CQI和 MCS信息。 所 以， 需要每个基站都知道可以协同的用户设备对应的传输假设。
其中， 目标基站根据收到的来自 CCN的调度信息， 确定是否需要为所述用户设备进 行 CoMP传输。 在确定为所述用户设备进行 CoMP传输后， 根据最近一次收到的该用户设 备的 CSI对预编码矩阵选择、 链路自适应， 相比背景技术对预编码矩阵选择和链路自适应 的信息只经过一个 backhaul, 缩短了时延。
目标基站在作为服务基站进行 CoMP传输时，根据最近一次确定的用户设备的 CSI对 预编码矩阵选择、 链路自适应。
本申请实施例中可以为基站配置传输假设集合， 每个用户设备对应一个传输假设集 合。
其中， 传输假设集合中包括多个传输假设， 每个传输假设包括信号状态信息和千扰状 态信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站（包括管理用户设备 的基站， 即服务基站， 以及该用户设备的协作基站）各自是否向该用户设备发送有用信号 的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站（包括管理用户设备 的基站， 即服务基站， 以及该用户设备的协作基站）各自是否对该用户设备的传输产生千 扰的信息。
如果千扰状态信息表示一个协作基站没有产生千扰， 则意味着该基站可能为有用信号 传输点或者该基站进行了静默或者该基站进行了协作预编码。
下面以两个例子， 对传输假设集合进行说明。
表 1给出了传输假设集合中包含 2个基站（服务基站 BS1、 协作基站 BS2 ) 的一个用 户设备的传输假设约定示例。 表 2给出了传输假设集合中包含 3个基站（服务基站 BS1、 协作基站 BS2、 协作基站 BS3 ) 的一个用户设备的传输假设约定示例。 表 1和表 2的千扰 状态信息中' On"表示产生了千扰， "Off表示没有产生千扰。
表 1. 传输假设集合中包括二个基站：
Figure imgf000009_0001
表 2. 传输假设集合中包括三个
Figure imgf000009_0002
14 On Off On Off On Off
15 On Off On Off Off Off
16 Off On On On Off Off
17 Off On On Off Off Off
18 On On On Off Off Off
在实施中， 可以在协议中设定用户设备和对应的传输假设集合； 也可以由各个设备之 间传输。 比如基站可以将自身管理的用户设备的传输假设集合和对应的用户设备标识传输 给 CCN和其他基站，即目标基站向自身管理的用户设备的协作基站和 /或 CCN发送自身管 理的用户设备对应的传输假设集合和自身管理的用户设备的用户设备标识； 也可以由基站 将自身管理的用户设备的传输假设集合和对应的用户设备标识传输给 CCN, 由 CCN再传 输给其他基站； 还可以由 CCN将每个用户设备的传输假设集合和对应的用户设备标识传 输给各个基站。
每个基站在得到传输假设集合后就可以确定用户设备标识和传输假设集合的对应关 系。
较佳地， 步骤 202之前还可以进一步包括：
针对其它基站管理的一个用户设备， 目标基站根据收到的来自其他基站或 CCN的传 输假设集合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系；
针对目标基站管理的一个用户设备， 如果由 CCN确定用户设备的传输假设集合， 则 目标基站根据收到的来自 CCN的传输假设集合和用户设备标识， 确定用户设备标识和传 输假设集合的对应关系； 如果由目标基站确定用户设备的传输假设集合 , 则目标基站自身 就可以直接确定传输假设集合和用户设备标识的对应关系。
较佳地， 步骤 202之前还可以进一步包括：
针对其它基站管理的一个用户设备，目标基站根据收到的其他基站发送的 CSI和传输 假设标识 , 确定传输假设标识和 CSI的对应关系；
针对目标基站管理的一个用户设备， 目标基站根据 CSI和传输假设的对应关系， 确定 传输^ 1设标识和 CSI的对应关系。 由于 CSI和传输支设的对应关系目标基站在确定 CSI后 就可以知道， 所以可以直接确定传输假设标识和 CSI的对应关系。
其中， 目标基站接收其他基站通知的每个用户设备的每个传输假设标识和对应的 CSI, 读取并记录 CSI中包含的信息， 同时覆盖当前记录的相同用户设备的相同传输假设标识对 应的信息。
其中，用户设备向目标基站上报 CSI后， 目标基站接收该用户设备的 CSI,可以将 CSI 和该 CSI对应的传输假设标识通知给其他基站和 /或 CCN。 具体的，目标基站将自身管理的用户设备的 CSI和该 CSI对应的传输假设的传输假设 标识发送给自身管理的用户设备的协作基站和 /或 CCN。
如果用户设备上报的是 CSI,则 CSI对应的传输假设为目标基站配置自身管理的用户 设备测量得到该 CSI时釆用的传输假设；
如果用户设备上报的是用于确定 CSI的信息， CSI对应的传输假设与 CSI对应的信号 和千扰情况相同。
在实施中， 目标基站根据用户设备的 CSI判断该用户设备可以支持的传输假设。例如， 测量集合中包括支持 2个传输点的一个用户设备， 上报了 2个 CSI, 其中一个 CSI对应传 输假设 BS1为传输点， BS2为千扰点， 另一个 CSI对应传输假设为 BS2为传输点， BS1 没有千扰， 根据表 1 , 目标基站判定该用户设备的 CSI对应传输假设 3 , 也就是说， 目标 基站将该 CSI作为该用户设备支持的传输假设对应的 CSI。
本申请实施例中的传输假设集合的作用是在所有协作基站之间（或者还包含 CCN )建 立传输假设和序号的映射关系。 方便协作基站接收服务基站发送的 CSI判断该 CSI对应哪 个传输假设。 协作基站需要用到服务基站发送的 CSI的情况只有在 CCN调度了该协作基 站为用户设备传输信号， 也就是说协作基站用到某个 CSI的时候必定是作为信号传输点的 时候， 那些仅对应服务基站作为传输点的 CSI是不需要通知给协作基站的， 这些 CSI的传 输假设就没有必要在传输假设集合中。
上述确定 CSI对应的传输假设是针对一个调度资源， 在实施中需要目标基站需要确定 每个调度资源上该用户设备支持的传输假设所对应的 CSI。
每个资源的 CSI和调度信息都可以相同也可以不同。 对于同一个用户设备的传输假设 集合在每个资源上是相同的。
目标基站把 CSI和传输假设标识通过 backhaul传输给对应的协作基站或 CCN(这里"对 应的协作基站 "至少包括千扰状态信息和信号状态信息表明为传输点的基站）。 目标基站可 以将 CSI和传输假设标识一起发送， 比如通过专用信令， 广播消息等发送； 也可以分别发 送。
步骤 202中， 目标基站在每个调度资源上根据 CCN通知的调度信息查找该目标基站 记录的对应传输假设标识的 CSI, 并将该 CSI确定为每个调度资源上的传输参数， 为用户 设备进行 CoMP传输。
具体的， 目标基站根据用户设备标识和传输假设集合的对应关系， 确定收到的来自 CCN的调度信息中的用户设备标识对应的传输假设集合；
目标基站根据确定的传输假设集合中的传输假设的传输假设标识和 CSI的对应关系， 确定收到的来自 CCN的调度信息中的传输假设标识对应的 CSI; 或根据收到的来自 CCN 的调度信息中的传输基站标识和 /或千扰基站标识确定信号状态信息和千扰状态信息，从用 户设备标识对应的传输假设集合中确定包含信号状态信息和千扰状态信息的传输假设， 根 据传输假设的传输假设标识和 CSI的对应关系， 确定传输假设对应的 CSI;
目标基站根据确定的 CSI,在调度信息指示的调度资源上为用户设备进行 CoMP传输。 其中， 调度信息除了包括上述内容中的信息之外， 还可以包括但不限于下列信息中的 部分或全部：
所调度的所有资源的序号 （如 PRB (物理资源块）序号） 、 所调度的资源块的大小、 所调度的资源块中某个资源的序号等。
在实施中， 针对一个调度资源上， CCN对该协作基站调度了协作集合中一个 CoMP 用户设备的 CoMP传输， CCN会把该用户设备标识和该 CoMP传输对应的传输假设标识 传输给该协作基站，或者该用户设备标识和传输基站识别和 /或千扰基站识别传输给该协作 基站；
相应的， 针对一个调度资源， 目标基站若收到 CCN通知的包含用户设备标识和传输 假设标识的调度信息， 则确定调度信息中的用户设备标识对应的传输假设集合， 并确定传 输假设集合中与收到的调度信息中的传输假设标识相同的传输假设标识对应的 CSI, 将该 CSI确定为每个调度资源上的传输参数， 为用户设备进行 CoMP传输。
以表 1为例， CCN将传输假设 3和用户设备标识置于调度信息中通知给目标基站， 目 标基站先根据用户设备标识确定传输假设集合， 即表 1 , 然后根据该传输假设集合中的传 输假设的传输假设标识和 CSI的对应关系， 确定调度信息中的传输假设 3对应的 CSI。
相应的， 针对一个调度资源， 目标基站若收到 CCN通知的包含用户设备标识和传输 基站标识和 /或千扰基站标识的调度信息， 根据收到的来自 CCN的调度信息中的传输基站 标识和 /或千扰基站标识确定信号状态信息和千扰状态信息，以及确定调度信息中的用户设 备标识对应的传输假设集合， 然后从用户设备标识对应的传输假设集合中确定包含确定的 信号状态信息和千扰状态信息的传输假设， 并根据传输假设的传输假设标识和 CSI的对应 关系， 确定传输假设对应的 CSI, 并将确定的 CSI作为每个调度资源上的传输参数， 为用 户设备进行 CoMP传输。
以表 1为例， 在根据收到的来自 CCN的调度信息中的传输基站标识和 /或千扰基站标 识确定信号状态信息和千扰状态信息时， 如果收到传输基站标识， 可以确定除传输基站标 识对应的基站之外的其他基站都不参与传输， 即除表明的传输基站之外的其它基站静默， 而对于千扰状态信息可以预先设定所有基站都没有千扰或所有基站都有千扰；
如果收到千扰基站标识， 确定除千扰基站标识对应的基站之外的其他基站都没有千 扰， 收到的千扰基站标识的基站默认确定本基站是用户设备的唯一信号传输基站；
如果收到传输基站标识和千扰基站标识， 确定传输基站标识对应的基站进行传输， 千 扰基站标识对应的基站有千扰。 以表 1为例， CCN将传输基站标识 BS2置于调度信息中发送给目标基站， 目标基站 如果只收到传输基站标识就确定没有千扰基站标识， 并且其他基站为非传输基站。
目标基站先根据置于调度信息中的用户设备标识确定传输假设集合， 即表 1 , 然后根 据传输基站标识 BS2、 没有千扰基站标识和其他基站为非传输基站， 就可以确定传输假设 标识为 3 , 然后根据该传输假设集合中的传输假设的传输假设标识和 CSI的对应关系， 确 定传输假设 3对应的 CSI。
下面以一个实例对本申请的方案进行说明。
假设： 系统中有 2个基站进行协作传输：基站 1、基站 2, 2个基站各有 2个用户设备， 基站 1下 UE1 ( CoMP用户设备，测量集合中包括基站 1和基站 2 )、 UE2;基站 2下 UE3、 UE4。
上述 2个基站有 1个调度资源：
基站 1向基站 2、 CCN通知 UE1的传输假设集合， 比如表 1的内容， 对 UE1而言， 表 1中 BS1表示基站 1 , BS2表示基站 2。
所有用户设备上报 CSI, 各基站通过 backhaul把各用户设备的 CSI传输给 CCN; 其中 UE1的 CSI上报中包含支持表 1中传输假设 3的 CSI。
基站 1确定 UE1的传输假设 3对应的 CSI、 UE1的标识、 传输假设 3的标识， 把这些 信息一起通知给基站 2, 基站 2记录 UE1的传输假设 3对应的 CSI。
基站 1将传输假设 3对应的 CSI和 UE1的标识传输给 CCN。 较佳地， 还可以传输假 设 3的标识。
CCN根据收到的信息按照一定的时间颗粒度周期进行调度。 假设 CCN为 2个基站调 度用户传输， 为基站 1调度静默， 为基站 2调度了 UE1的单点传输；
CCN向基站 1传输表示静默的信息； 向基站 2传输 UE1的标识和传输假设 3的标识。
2个基站分别接收调度信息：
基站 1根据 CCN通知的静默信息不进行传输；
基站 2根据用户设备标识， 确定 UE1为目标用户设备， 根据收到的传输假设标识， 确 定对应的 CSI, 并按照 CSI为 UE1传输数据。
如图 3所示， 本申请实施例提供的 CCN指示目标基站进行 CoMP传输的方法包括下 列步骤：
步骤 301、 CCN根据收到的管理用户设备的基站发送的该用户设备的 CSI, 确定需要 为该用户设备进行 CoMP传输的协作基站；
步骤 302、 CCN通知确定的协作基站， 由协作基站根据收到的服务基站发送的该用户 设备的 CSI为用户设备进行 CoMP传输。 较佳地， 步骤 302中， CCN将包含用户设备标识和调度传输对应的传输假设的传输假 设标识的调度信息发送给确定的基站； 或
CCN将包含用户设备标识和根据调度传输确定的传输基站的传输基站标识和 /或千扰 基站的千扰基站标识的调度信息发送给确定的协作基站；
其中， 传输假设集合中包括多个传输假设， 每个传输假设包括信号状态信息和千扰状 态信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站（包括管理用户设备 的基站， 即服务基站， 以及该用户设备的协作基站）各自是否向该用户设备发送有用信号 的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站（包括管理用户设备 的基站， 即服务基站， 以及该用户设备的协作基站）各自是否对该用户设备的传输产生千 扰的信息。
基于同一发明构思， 本申请实施例中还提供了一种进行 CoMP传输的系统、 目标基站 及 CCN, 由于这些设备解决问题的原理与本申请实施例的方法相似， 因此这些设备的实施 可以参见方法的实施， 重复之处不再赘述。
如图 4所示， 本申请实施例进行 CoMP传输的系统包括： CCN 40和目标基站 41。
CCN 40, 用于根据收到的管理用户设备的基站发送的该用户设备的 CSI, 确定需要为 该用户设备进行 CoMP传输的协作基站； 通知确定的协作基站， 由协作基站根据收到的管 理用户设备的基站发送的用户设备的 CSI为用户设备进行 CoMP传输。
目标基站 41 , 用于接收其他基站发送的由其他基站管理的用户设备的 CSI; 根据收到 的 CCN 40的通知， 在需要为用户设备进行 CoMP传输时， 根据收到的管理用户设备的基 站发送的该用户设备的 CSI为用户设备进行 CoMP传输。
如图 5所示， 本申请实施例的目标基站包括： 接收模块 500和处理模块 510。
接收模块 500, 用于接收其他基站发送的由其他基站管理的用户设备的 CSI;
处理模块 510, 用于在需要为用户设备进行 CoMP传输时， 根据收到的管理用户设备 的基站发送的该用户设备的 CSI为用户设备进行 CoMP传输。
较佳地， 处理模块 510根据收到的来自中心协作节点 CCN的调度信息， 确定是否需 要为所述用户设备进行 CoMP传输。
较佳地， 处理模块 510根据用户设备标识和传输假设集合的对应关系， 确定收到的来 自 CCN的调度信息中的用户设备标识对应的传输假设集合， 其中传输假设集合中包括多 个传输假设， 每个传输假设包括信号状态信息和千扰状态信息， 信号状态信息是表示为用 户设备进行 CoMP传输的每个基站各自是否向该用户设备发送有用信号的信息， 千扰状态 信息是表示为用户设备进行 CoMP传输的每个基站各自是否对该用户设备的传输产生千扰 的信息； 根据确定的传输假设集合中的传输假设的传输假设标识和 CSI的对应关系， 确定 收到的来自 CCN的调度信息中的传输支设标识对应的 CSI; 或#>据收到的来自 CCN的调 度信息中的传输基站标识和 /或千扰基站标识确定信号状态信息和千扰状态信息，从用户设 备标识对应的传输假设集合中确定包含信号状态信息和千扰状态信息的传输假设， 根据传 输假设的传输假设标识和 CSI的对应关系， 确定传输假设对应的 CSI; 根据确定的 CSI, 在调度信息指示的调度资源上为用户设备进行 CoMP传输。
较佳地， 处理模块 510针对其它基站管理的一个用户设备，根据收到的其他基站发送 的 CSI和传输支设标识， 确定传输支设标识和 CSI的对应关系； 针对目标基站管理的一个 用户设备， 根据 CSI和传输假设的对应关系， 确定传输假设标识和 CSI的对应关系。
较佳地， 处理模块 510针对其它基站管理的一个用户设备，根据收到的来自其他基站 或 CCN的传输假设集合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系。
较佳地， 处理模块 510针对目标基站管理的一个用户设备， 根据收到的来自 CCN的 传输假设集合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系。
较佳地， 该目标基站还包括： 发送模块 520。
发送模块 520, 用于向自身管理的用户设备的协作基站发送该用户设备的 CSI。
较佳地，发送模块 520将自身管理的用户设备的 CSI和该 CSI对应的传输假设的传输 假设标识发送给自身管理的用户设备的协作基站。
较佳地，发送模块 520向自身管理的用户设备的协作基站和 /或 CCN发送自身管理的 用户设备对应的传输假设集合和自身管理的用户设备的用户设备标识。
如图 6所示， 本申请另一实施例的目标基站 600包括： 处理器 610和存储器 620。 处理器 610被配置为执行具备下列功能的计算机程序：接收其他基站发送的由其他基 站管理的用户设备的 CSI; 在需要为用户设备进行 CoMP传输时， 根据收到的管理用户设 备的基站发送的该用户设备的 CSI为用户设备进行 CoMP传输。
存储器 620被配置为保存上述计算机程序的代码。
某些情况下，处理器执行上述计算机程序实现的功能可以由处理器和基带处理器执行 的计算机程序配合实现。
如图 7所示， 本申请实施例的 CCN包括： 确定模块 700和通知模块 710。
确定模块 700, 用于根据收到的管理用户设备的基站发送的该用户设备的 CSI, 确定 需要为该用户设备进行 CoMP传输的协作基站；
通知模块 710, 用于通知确定的协作基站， 由协作基站根据收到的管理用户设备的基 站发送的用户设备的 CSI为用户设备进行 CoMP传输。
较佳地，通知模块 710将包含用户设备标识和调度传输对应的传输假设的传输假设标 识的调度信息发送给确定的协作基站； 或将包含用户设备标识和根据调度传输确定的传输 基站的传输基站标识和 /或千扰基站的千扰基站标识的调度信息发送给确定的协作基站； 其中传输假设集合中包括多个传输假设，每个传输假设包括信号状态信息和千扰状态 信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否向该用户设备 发送有用信号的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站各自是 否对该用户设备的传输产生千扰的信息。
如图 8所示， 本申请另一实施例的 CCN800包括： 处理器 810和存储器 820。
处理器 810, 被配置为执行具备下列功能的计算机程序： 根据收到的管理用户设备的 基站发送的该用户设备的 CSI, 确定需要为该用户设备进行 CoMP传输的协作基站； 通知 确定的协作基站， 由协作基站根据收到的管理所述用户设备的基站发送的所述用户设备的 CSI为所述用户设备进行 CoMP传输；
存储器 820, 被配置为保存上述计算机程序的代码。
某些情况下，处理器执行上述计算机程序实现的功能可以由处理器和基带处理器执行 的计算机程序配合实现。
本领域内的技术人员应明白， 本申请的实施例可提供为方法、 系统、 或计算机程序产 品。 因此， 本申请可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且， 本申请可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 （包括但不限于磁盘存储器、 CD-ROM、 光学存储器等）上实施的计算机程 序产品的形式。
本申请是参照根据本申请实施例的方法、 设备（系统）、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器， 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中， 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品， 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上， 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理， 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例， 但本领域内的技术人员一旦得知了基本创造性概 念， 则可对这些实施例作出另外的变更和修改。 所以， 所附权利要求意欲解释为包括优选 实施例以及落入本申请范围的所有变更和修改。
显然， 本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和 范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内， 则本申请也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种进行协作多点传输技术 CoMP传输的方法， 其特征在于， 该方法包括： 目标基站接收其他基站发送的由其他基站管理的用户设备的信道状态信息 CSI; 所述目标基站在需要为所述用户设备进行 CoMP传输时，根据收到的所述用户设备的 所述 CSI为所述用户设备进行 CoMP传输。
2、 如权利要求 1所述的方法， 其特征在于， 所述目标基站根据收到的所述用户设备 的所述 CSI为所述用户设备进行 CoMP传输之前， 还包括：
所述目标基站根据收到的来自中心协作节点 CCN的调度信息， 确定是否需要为所述 用户设备进行 CoMP传输。
3、 如权利要求 2所述的方法， 其特征在于， 所述目标基站根据收到的所述用户设备 的所述 CSI为所述用户设备进行 CoMP传输， 包括：
所述目标基站根据用户设备标识和传输假设集合的对应关系， 确定收到的来自 CCN 的调度信息中的用户设备标识对应的传输假设集合， 其中传输假设集合中包括多个传输假 设， 每个传输假设包括信号状态信息和千扰状态信息， 信号状态信息是表示为用户设备进 行 CoMP传输的每个基站各自是否向该用户设备发送有用信号的信息， 千扰状态信息是表 示为用户设备进行 CoMP传输的每个基站各自是否对该用户设备的传输产生千扰的信息； 所述目标基站根据确定的传输假设集合中的传输假设的传输假设标识和 CSI的对应 关系，确定收到的来自 CCN的调度信息中的传输假设标识对应的 CSI; 或根据收到的来自 CCN的调度信息中的传输基站标识和 /或千扰基站标识确定信号状态信息和千扰状态信息， 从所述用户设备标识对应的传输假设集合中确定包含所述信号状态信息和千扰状态信息 的传输假设， 根据所述传输假设的传输假设标识和 CSI的对应关系， 确定所述传输假设对 应的 CSI;
所述目标基站根据确定的 CSI, 在所述调度信息指示的调度资源上为所述用户设备进 行 CoMP传输。
4、 如权利要求 3所述的方法， 其特征在于， 所述目标基站根据下列方式确定传输假 设标识和 CSI的对应关系：
针对其它基站管理的一个用户设备， 所述目标基站根据收到的其他基站发送的所述 CSI和传输假设标识， 确定传输假设标识和 CSI的对应关系；
针对目标基站管理的一个用户设备， 所述目标基站根据 CSI和传输假设的对应关系， 确定传输^ 1设标识和 CSI的对应关系。
5、 如权利要求 3所述的方法， 其特征在于， 所述目标基站根据下列方式确定用户设 备标识和传输假设集合的对应关系：
针对其它基站管理的一个用户设备， 所述目标基站根据收到的来自其他基站或 CCN 的传输假设集合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系；
针对目标基站管理的一个用户设备， 所述目标基站根据收到的来自 CCN的传输假设 集合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系。
6、 如权利要求 1所述的方法， 其特征在于， 该方法还包括：
所述目标基站向自身管理的用户设备的协作基站发送该用户设备的 CSI。
7、 如权利要求 6所述的方法， 其特征在于， 所述目标基站向自身管理的用户设备的 协作基站发送该用户设备的 CSI, 包括：
所述目标基站将自身管理的用户设备的 CSI和该 CSI对应的传输假设的传输假设标识 发送给自身管理的用户设备的协作基站。
8、 如权利要求 6所述的方法， 其特征在于， 该方法还包括：
所述目标基站向自身管理的用户设备的协作基站和 /或 CCN发送自身管理的用户设备 对应的传输假设集合和自身管理的用户设备的用户设备标识。
9、 一种进行 CoMP传输的方法， 其特征在于， 该方法包括：
CCN根据收到的管理用户设备的基站发送的该用户设备的 CSI,确定需要为该用户设 备进行 CoMP传输的协作基站；
所述 CCN通知确定的协作基站， 由协作基站根据收到的管理所述用户设备的基站发 送的所述用户设备的 CSI为所述用户设备进行 CoMP传输。
10、 如权利要求 9所述的方法， 其特征在于， 所述 CCN通知确定的协作基站， 包括： 所述 CCN将包含用户设备标识和调度传输对应的传输假设的传输假设标识的调度信 息发送给确定的协作基站； 或， 所述 CCN将包含用户设备标识和根据调度传输确定的传 输基站的传输基站标识和 /或千扰基站的千扰基站标识的调度信息发送给确定的协作基站； 其中，传输假设集合中包括多个传输假设，每个传输假设包括信号状态信息和千扰状 态信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否向该用户设 备发送有用信号的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站各自 是否对该用户设备的传输产生千扰的信息。
11、 一种进行 CoMP传输的目标基站， 其特征在于， 该目标基站包括：
接收模块， 用于接收其他基站发送的由其他基站管理的用户设备的 CSI;
处理模块，用于在需要为所述用户设备进行 CoMP传输时，根据收到的所述用户设备 的所述 CSI为所述用户设备进行 CoMP传输。
12、 如权利要求 11所述的目标基站， 其特征在于， 所述处理模块具体用于： 根据收到的来自 CCN的调度信息， 确定是否需要为所述用户设备进行 CoMP传输。
13、 如权利要求 12所述的目标基站， 其特征在于， 所述处理模块还用于： 根据用户设备标识和传输假设集合的对应关系， 确定收到的来自 CCN的调度信息中 的用户设备标识对应的传输假设集合， 其中传输假设集合中包括多个传输假设， 每个传输 假设包括信号状态信息和千扰状态信息， 信号状态信息是表示为用户设备进行 CoMP传输 的每个基站各自是否向该用户设备发送有用信号的信息， 千扰状态信息是表示为用户设备 进行 CoMP传输的每个基站各自是否对该用户设备的传输产生千扰的信息； 根据确定的传 输假设集合中的传输假设的传输假设标识和 CSI的对应关系， 确定收到的来自 CCN的调 度信息中的传输假设标识对应的 CSI;或根据收到的来自 CCN的调度信息中的传输基站标 识和 /或千扰基站标识确定信号状态信息和千扰状态信息，从所述用户设备标识对应的传输 假设集合中确定包含所述信号状态信息和千扰状态信息的传输假设， 根据所述传输假设的 传输假设标识和 CSI的对应关系， 确定所述传输假设对应的 CSI; 根据确定的 CSI, 在所 述调度信息指示的调度资源上为所述用户设备进行 CoMP传输。
14、 如权利要求 13所述的目标基站， 其特征在于， 所述处理模块具体用于： 针对其它基站管理的一个用户设备，根据收到的其他基站发送的所述 CSI和传输假设 标识， 确定传输支设标识和 CSI的对应关系；
针对目标基站管理的一个用户设备，根据所述 CSI和传输假设的对应关系，确定传输 1设标识和 CSI的对应关系。
15、 如权利要求 13所述的目标基站， 其特征在于， 所述处理模块具体用于： 针对其它基站管理的一个用户设备， 根据收到的来自其他基站或 CCN的传输假设集 合和用户设备标识， 确定用户设备标识和传输假设集合的对应关系；
针对目标基站管理的一个用户设备， 根据收到的来自 CCN的传输假设集合和用户设 备标识， 确定用户设备标识和传输假设集合的对应关系。
16、 如权利要求 11所述的目标基站， 其特征在于， 该目标基站还包括：
发送模块， 用于向自身管理的用户设备的协作基站发送该用户设备的 CSI。
17、 如权利要求 16所述的目标基站， 其特征在于， 所述发送模块具体用于： 将自身管理的用户设备的 CSI和该 CSI对应的传输假设的传输假设标识发送给自身管 理的用户设备的协作基站。
18、 如权利要求 16所述的目标基站， 其特征在于， 所述发送模块还用于： 向自身管理的用户设备的协作基站和 /或 CCN发送自身管理的用户设备对应的传输假 设集合和自身管理的用户设备的用户设备标识。
19、 一种进行 CoMP传输的 CCN, 其特征在于， 该 CCN包括： 确定模块， 用于根据收到的管理用户设备的基站发送的该用户设备的 CSI, 确定需要 为该用户设备进行 CoMP传输的协作基站；
通知模块， 用于通知确定的协作基站， 由协作基站根据收到的管理所述用户设备的基 站发送的所述用户设备的 CSI为所述用户设备进行 CoMP传输。
20、 如权利要求 19所述的 CCN, 其特征在于， 所述通知模块具体用于：
将包含用户设备标识和调度传输对应的传输假设的传输假设标识的调度信息发送给 确定的协作基站； 或， 将包含用户设备标识和根据调度传输确定的传输基站的传输基站标 识和 /或千扰基站的千扰基站标识的调度信息发送给确定的协作基站；
其中， 传输假设集合中包括多个传输假设， 每个传输假设包括信号状态信息和千扰状 态信息， 信号状态信息是表示为用户设备进行 CoMP传输的每个基站各自是否向该用户设 备发送有用信号的信息， 千扰状态信息是表示为用户设备进行 CoMP传输的每个基站各自 是否对该用户设备的传输产生千扰的信息。
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