WO2012167687A1 - Comp终端的协作调度的方法和系统 - Google Patents

Comp终端的协作调度的方法和系统 Download PDF

Info

Publication number
WO2012167687A1
WO2012167687A1 PCT/CN2012/075573 CN2012075573W WO2012167687A1 WO 2012167687 A1 WO2012167687 A1 WO 2012167687A1 CN 2012075573 W CN2012075573 W CN 2012075573W WO 2012167687 A1 WO2012167687 A1 WO 2012167687A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel data
terminal
base station
cell
coordinated
Prior art date
Application number
PCT/CN2012/075573
Other languages
English (en)
French (fr)
Inventor
王文焕
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012167687A1 publication Critical patent/WO2012167687A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present invention relates to the field of digital communications, and in particular, to a method and system for cooperative scheduling of CoMP terminals in a Coordinated Multipoint Transmission/Reception (CoMP).
  • CoMP Coordinated Multipoint Transmission/Reception
  • Orthogonal Frequency Division Multiplexing reduces the sensitivity of the system to multipath fading channel frequency selectivity by converting a high-speed transmitted data stream into a set of low-speed parallel-transmitted data streams.
  • the introduction of the cyclic prefix further enhances the system's ability to resist Inter-symbol Interference (ISI).
  • ISI Inter-symbol Interference
  • the application of OFDM in the wireless communication neighborhood is becoming more and more important.
  • the wider the LTE (Long Term Evolution) system based on Orthogonal Frequency Division Multiple Access (OFDM) and the LTE next-generation evolved LTE-Advanced system (fourth generation communication system) are based on orthogonal frequency division.
  • a system of Orthogonal Frequency Division Multiplex (OFDM) technology is based on orthogonal frequency division.
  • LTE-Advanced systems use some such as relay, spectrum aggregation and New technologies such as CoMP) enhance system performance.
  • CoMP was originally derived from the definition of Ericsson's manuscript, Coordinated Multipoint transmission/reception. The original intention of introducing CoMP is to solve the inter-cell interference problem in the OFDM system, and improve the throughput of the cell edge UE. For example, multiple eNBs (Evolved Node Base) cooperate to eliminate ICI (InterCarrier Interference), and even change the interference signal into a desired signal.
  • ICI InterCarrier Interference
  • 3GPP has accepted CoMP as one of the LTE-Advanced technologies.
  • CoMP technology can be divided into uplink CoMP technology and downlink CoMP technology from the transmission direction.
  • the downlink CoMP refers to a plurality of coordinated cells jointly sending data to the user
  • the uplink CoMP refers to data of multiple coordinated cells jointly receiving the UE.
  • CoMP coordinated cell set The network is based on the geographical distribution of the cell, and a set of sending points directly or indirectly participate in the physical downlink shared channel (PDSCH, Physical Downlink) of the UE. Shared Channel ).
  • PDSCH Physical Downlink shared channel
  • CoMP measurement cell set A cell that performs periodic or aperiodic measurement and reports related channel status and statistics according to network requirements.
  • a serving cell A cell that transmits a Physical Downlink Control Channel (PDCCH) to a mobile station, and has only one serving cell in the communication process.
  • PDCCH Physical Downlink Control Channel
  • the standard mid-downlink CoMP technology is mainly divided into the following two categories: Joint processing (JP): The same data is sent to the user in the cell in each coordinated cell set, and the user can use the gain similar to macro diversity to improve the receiving effect.
  • Joint processing Joint processing
  • Coordinated Scheduling/Coordinated Beamforming CS/CB: The cells in each coordinated cell are only sent by users in their own cell, and the beamforming technology is used to enhance the signal to the users of the cell.
  • the user interference on the same resources of the neighboring cells is weakened, and the receiving effect is improved by improving the signal-to-noise ratio.
  • the embodiment of the present invention adopts the CB mode as the working mode.
  • the serving cell of UE1 is cell 1
  • the coordinated cell is cell 2
  • the serving cell of UE2 is cell 2
  • the coordinated cell is cell 1.
  • the basic principle of the existing downlink CoMP system is as shown in Fig. 1: N eNBs are provided. Each cell serves only one UE, but the UE served by each cell is in the same-frequency resource, and each cell only transmits data for the downlink of the served UE. To minimize the interference of the UE at the cell edge, it is necessary to select the optimal. Precoding.
  • the optimal solution under the above criteria is the first few generalized features of the channel of the UE in the "first cell" to the channel of the own cell with respect to the sum of all other base stations i ⁇ j channels + ''' + The generalized feature vector corresponding to the value.
  • the feature vector corresponding to the first large feature value of R is represented, and represents the number of layers used by the UE in the first cell.
  • the eNB needs to know the measured channel value of the UE of the local cell and the measured channel value to the neighboring cell UE.
  • the UE1 measures the measured value of the channel of the local cell (ie, the serving cell).
  • the measured value H 12 of the interference channel of the coordinated cell to the local cell, and the measured H Volunteer, H 12 value is fed back to the serving base station eNB1 of the UE1, and the UE2 measures the measured value H 22 of the local cell and the interference H 21 of the coordinated cell to the local cell.
  • the measured H 22 and H 21 values are fed back to the serving base station eNB2 of the UE2, that is, the existing system considers that the interference channel H 21 of the cell 1 user UE1 to the user UE2 of the cell 2 can only be fed back to the neighboring cell eNB2 through the UE2, similarly The interference channel H 12 of the cell 2 user UE2 to the cell 1 user UE1 can only be fed back to the neighboring cell eNB1 through the UE1.
  • the channel data needs to be exchanged between the eNBs.
  • the X2 interface can be used for message transmission to complete uplink cooperation and downlink cooperation.
  • the X2 interface limits the performance of CoMP due to bottlenecks such as delay capacity.
  • the prior art and the proposal discuss the basic independent discussion of uplink cooperation and downlink cooperation, and the uplink cooperation is limited to joint reception, that is, the type of the packet is divided into TB (Transport Block), CB (Code Block), Soft bit level, IQ sample (per). Antenna) level, etc., and further joint reception.
  • TB Transmission Block
  • CB Code Block
  • Soft bit level Soft bit level
  • IQ sample per.
  • Antenna Antenna
  • the cooperation between the base stations must exchange a large amount of channel information through the X2 interface; the application of the uplink cooperative reception in the downlink CoMP system is not considered; the delay of the X2 interface is large; the current proposal and patent analysis mainly include the type of the packet TB (Transport Block) ), CB (Code Block), Soft bit level, IQ sample (per antenna) level, etc., have not considered the validity of the information at the opposite end, and the interaction of effective information can reduce the interactive information. Summary of the invention
  • the technical problem to be solved by the embodiments of the present invention is to provide a cooperative scheduling of a CoMP terminal.
  • the method and system solve the problem of large amount of interactive information between base stations.
  • an embodiment of the present invention provides a method for cooperative scheduling of a CoMP terminal, where the method includes:
  • the base station receives channel data transmitted by the terminal it serves and the terminal it cooperates with;
  • the base station performs downlink cooperative scheduling according to the received channel data.
  • the channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data, where the base station is a terminal that receives its service and its coordinated terminal period or aperiodic transmission.
  • the serving cell channel data or the coordinated cell channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data, where the base station is a terminal that receives its service and its coordinated terminal period or aperiodic transmission.
  • the serving cell channel data or the coordinated cell channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data, where the base station is a terminal that receives its service and its coordinated terminal period or aperiodic transmission.
  • the base station is channel data and coordinated cell channel data of a service segment that is sent by the terminal that receives the service and the terminal that cooperates with the terminal.
  • the base station only receives the serving cell channel data of the terminal it serves and the coordinated cell channel data of the coordinated terminal thereof, or the serving cell channel data and the coordinated cell channel data of the terminal that the base station receives, and Cooperative terminal channel data and coordinated cell channel data of the cooperative terminal.
  • the method further includes: if the base station receives channel data error, the base station interacts with the cooperative base station to obtain correct channel data or process the correct channel data. Intermediate data or scheduling results.
  • an embodiment of the present invention further provides a system for cooperative scheduling of a CoMP terminal, where the system includes a channel data sending module of the terminal, a channel data receiving module of the base station, and a cooperative scheduling module of the base station, where:
  • the channel data sending module is configured to send channel data to a base station of the serving cell and the coordinated cell;
  • the channel data receiving module is configured to receive channel data sent by the terminal served by the base station and the coordinated terminal;
  • the cooperative scheduling module of the base station is configured to perform downlink cooperative scheduling according to channel data received by the channel data receiving module.
  • the channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data
  • the channel data sending module of the terminal is set to periodic or non-circular.
  • the serving cell channel data or the coordinated cell channel data is transmitted.
  • the channel data sending module of the terminal is channel data and coordinated cell channel data set to be time-sharing or jointly transmitting the service cell.
  • the channel data receiving module of the base station is configured to: receive only the serving cell channel data of the serving terminal and the coordinated cell channel data of the cooperative terminal, or receive the serving cell channel data and the coordinated cell channel data of the serving terminal, And serving cell channel data and coordinated cell channel data of the cooperative terminal.
  • the system further includes an interaction module of the base station, where the interaction module is configured to: when the base station receives the channel data error, interact with the cooperative base station to obtain correct channel data or process the correct channel data. Intermediate data or scheduling results.
  • the embodiment of the present invention further provides a base station, which is used for cooperative scheduling of a coordinated multi-point transmission (CoMP) terminal, where the base station includes a channel data receiving module and a cooperative scheduling module, where:
  • the channel data receiving module is configured to receive channel data sent by the terminal served by the base station and the coordinated terminal;
  • the cooperative scheduling module is configured to perform downlink cooperative scheduling according to channel data received by the channel data receiving module.
  • the channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data, where the channel data receiving module is configured to receive the base station service terminal and cooperate terminal period Or the serving cell channel data or coordinated cell channel data that is transmitted aperiodically.
  • the channel data receiving module of the base station is configured to: receive only the serving cell channel data of the serving terminal and the coordinated cell channel data of the cooperative terminal, or receive the serving cell channel data and the coordinated cell channel data of the serving terminal, and Cooperative terminal channel data and coordinated cell channel data of the cooperative terminal.
  • the foregoing base station further includes an interaction module, where the interaction module is configured to: when the received channel data is incorrect, interact with the cooperative base station to obtain correct channel data or intermediate data or scheduling result after processing the correct channel data.
  • the terminal sends channel data to the base station of the serving cell and the coordinated cell, and after receiving the corresponding data, the base station can directly perform cooperative scheduling, without interaction with other base stations, and reduces the X2 interface. The amount of information that is interacted with.
  • Figure 1 is a schematic diagram of the basic principle of a CoMP system
  • FIG. 2 is a schematic diagram of a method for cooperative scheduling of a CoMP terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of application example 1 showing feedback, wherein the UE uses the time-sharing transmission mode 1
  • FIG. 4 is another schematic diagram of the application example 1 display feedback.
  • the UE uses the time-sharing transmission mode 2
  • FIG. 5 is a schematic diagram of the application example 2 implicit feedback.
  • FIG. 6 is a schematic diagram of another cooperative scheduling method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a module of a system for cooperative scheduling of a CoMP terminal according to an embodiment of the present invention. Preferred embodiment of the invention
  • the main idea of the cooperative scheduling method and system of the CoMP terminal is that the terminal sends channel data to the base station of the serving cell and the coordinated cell, and after receiving the corresponding data, the base station can directly perform cooperative scheduling without interaction with other base stations, thereby reducing The amount of information that the X2 interface interacts with.
  • the method for cooperative scheduling of a CoMP terminal is as shown in FIG. 2, and the method includes:
  • Step 201 The terminal sends channel data to the base station of the serving cell and the coordinated cell.
  • the UE For the UE, if the cell is a serving cell, the UE is a serving UE of the cell; if the cell is a coordinated cell, the UE is a coordinated UE of the cell.
  • the UE measures the channel of the serving cell and the channel of the coordinated cell (also called the interference channel), and obtains the serving cell channel data and the coordinated cell channel data (also referred to as coordinated cell interference channel data).
  • the terminal sends the channel data, according to the characteristics of the specifically transmitted channel data, it is necessary to first measure or process the measured value.
  • Downlink measurement First, the UE performs channel measurement of the own cell and the coordinated cell according to the CSI-RS or other information configured by the cell. The calculation is performed according to the scheduling information of the upper layer, and the measurement report is composed, and is sent to the base station of the serving cell and the base station of the coordinated cell. Supports channel data for display feedback or implicit feedback channel data.
  • the explicit feedback refers to the user measuring the channel condition (for example: frequency domain channel response information), and does not perform any processing on the information, and directly feeds back to the base station, so that the base station obtains complete channel response information.
  • the measurement report includes channel data for the serving cell and/or interference channel data for the cooperating cell. Implicit feedback means that after measuring the channel condition, the user processes the obtained channel information and converts it into a specific quantized value and feeds it back to the base station. For implicit feedback, the measurement report can be on the best PMI and worst PMI in the community.
  • Uplink measurement The UE sends an uplink measurement SRS, and the base station of the coordinated cell measures the SRS of the UE, and obtains channel information of the UE of the current cell and channel information of the neighboring UE.
  • the channel data includes serving cell channel data and coordinated cell channel data, and the terminal periodically or aperiodically transmits the serving cell channel data or coordinated cell channel data.
  • the terminal may send channel data of the serving cell and coordinated cell channel data in a time-sharing or joint manner.
  • the existing system CQI (channel quality indication), PMI (recoding matrix indicator), and RI (rank indication) measurement report may be periodic or aperiodic, and may be fed back using PUSCH or feedback using PUCCH.
  • the UE needs to feed back the channel data of the serving cell, and also needs to feed back the channel data of the coordinated cell, where the feedback methods include the following:
  • the UE periodically feeds back the channel data of the serving cell, and the channel data of the coordinated cell is aperiodically fed back, and the base station of the coordinated cell notifies the scheduling process of the aperiodic measurement of the UE.
  • the UE periodically feeds back the channel data of the serving cell and the channel data of the coordinated cell, and notifies the scheduling information by the serving cell base station and the coordinated cell base station.
  • the UE jointly reports the channel data of the serving cell and the channel data of the coordinated cell in a periodic or aperiodic manner, and the base station notifies its scheduling information, and the scheduling period may be periodic or aperiodic.
  • the scheduling mode is configured by the base station high layer signaling, and the sub-band high-level configurations of all the coordinated cells are the same.
  • the measurement report may be display channel feedback or implicit channel feedback.
  • Step 202 The base station receives the channel data of the terminal that the terminal it serves and the terminal that cooperates with it; if the UE feeds back the channel data of the serving cell and the channel data of the coordinated cell, the base station can receive the serving cell of the terminal it serves. Coordinated cell channel data for channel data and its cooperating terminals.
  • the base station triggers the cooperative receiving UE feedback of the base station according to the uplink scheduling result of the interaction.
  • the base station For the aperiodic feedback, the base station triggers the base station to cooperatively receive the UE feedback according to the scheduling result of the interaction.
  • the base station for selective reception, that is, in this case, only receives channel information that is useful to itself, and does not require inter-base station interaction. If the information received by the base station is completely incorrect, the downlink configuration is performed according to the original configuration information, and the next feedback measurement information is waited for. If the UE jointly feeds back channel data of the serving cell and channel data of the coordinated cell, the base station receives feedback information of all UEs, including serving cell channel data and coordinated cell channel data of the terminal it serves, and serving cell channel data of the coordinated terminal and Cooperative cell channel data.
  • the base station For joint reception, that is, the base station not only receives the channel information useful to itself, but also receives the channel data of the coordinated cell of its serving terminal and the serving cell channel data of its coordinated terminal, and receives any information reception error of the serving cell base station of its coordinated terminal.
  • the base station may request the correct feedback information of the base station to correctly calculate the PMI of the current cell or directly request the useful information (such as intermediate data or scheduling result, PMI) after the interaction processing.
  • Step 203 The base station performs downlink cooperative scheduling according to the received channel data.
  • a specific implementation manner of the present invention is described by taking two cells and two UEs as an example.
  • the mobile terminal UE1 is located in the cell 1, and the mobile terminal UE2 is located in the cell 2.
  • UE1 and UE2 occupy the same time-frequency resource, and cell 1 and cell 2 interfere with each other to degrade the performance of the respective UE.
  • the cell 1 and the cell 2 are used as a cooperative set, and the UE1 and the UE2 are paired users, and the method for the measurement and reporting of the interaction is sent to the serving UE through the respective high layer signaling.
  • Application example 1
  • UE1 and UE2 send channel data by means of display feedback, which specifically includes:
  • Step 1 The UE sends channel data.
  • the measurement of the serving cell channel H shown in "FIG, H 22 is, according to high-level command channel data feedback may be a channel of the primary feature appears feedback, such as channel H 12 is, H 21 or main feature, or the covariance (Ri) of the channel, or the main feature of (Ri).
  • the channel data fed back may be the channels H 12 , H 21
  • the channel H is used as feedback, and the feedback of other channel characteristics can be extended by taking this as an example.
  • the feedback content reports the channel matrix, the channel vector, the eigenvalue, and the like, and the display feedback overhead is relatively large.
  • the time-sharing feedback model is used, and other feedback models can be extended by taking this as an example.
  • the interference to the coordinated cell user can be reduced according to the cooperation criterion, that is, without losing itself.
  • UE1 and UE2 transmit the mode 1 in a time-sharing manner, for example, feeding back the service to the base station of the serving cell at the first time.
  • the channel value of the cell returns the channel value of the coordinated cell to the base station of the coordinated cell at the second time.
  • UE1 and UE2 have another time-sharing manner 2, such as feeding back the channel value of the serving cell to the base station of the serving cell and the base station of the coordinated cell at the first time, and to the serving cell at the second time.
  • the base station and the base station of the coordinated cell feed back the channel value of the serving cell and the channel value of the coordinated cell.
  • Step 2 The eNB receives channel data.
  • eNB1 receives the H awkward or channel main feature fed back by the UE1 it serves, or the covariance (Ri) of the channel, or the main feature of (Ri), the eNB2 receives The H 22 or channel main feature of the coordinated UE2 feedback, or the covariance (Ri) of the channel, or the main feature of (Ri), at the second moment, the eNB1 receives the H 21 or channel main feature fed back by its coordinated UE2, or The covariance (Ri) of the channel, or the main feature of (Ri), eNB2 receives its coordinated UE1 inverse The main characteristics of the H 12 or channel fed, or the covariance (Ri) of the channel, or (Ri).
  • the main features of the channel may be feature values and feature matrices.
  • eNB1 receives the Humble or channel main feature fed back by the UE1 it serves, or the covariance (Ri) of the channel, or the main feature of (Ri), and its The H 22 or channel main feature fed back by the coordinated UE2, or the covariance (Ri) of the channel, or the main feature of (Ri), the eNB2 receives the H ⁇ or channel main feature fed back by its coordinated UE2, or the covariance of the channel ( Ri), or the main features of (Ri), and the H 22 or channel main features of the UE2 feedback it serves, or the covariance (Ri) of the channel, or the main feature of (Ri); at the second moment, the eNB1 receives its cooperation The main characteristics of the H 21 or channel fed back by UE2, or the covariance (Ri) of the channel, or the main characteristics of (Ri), and the H 12 or channel main features fed back by UE1, or
  • Step 3 The eNB performs downlink cooperation calculation according to the received information.
  • the respective cells obtain the optimal weight of the next cooperative scheduling according to the channel information obtained by themselves, according to the criterion of the maximum information leakage ratio, the optimal solution under the above criteria, i'opt cell 1 is obtained according to Channel information H réelle H 21 , calculation:
  • the scheduling information may be extracted according to the respective needs, or the required information may be further obtained according to the received correct or incorrect information.
  • the transmission right value of the local cell is calculated by receiving the correct cell, and when the reception cell receives the error, the transmission weight of the coordinated cell is calculated, and the transmission weight of the coordinated cell is sent to the X2 interface.
  • joint channel H receiving channel information on the error cell such as cell 1 receives the "H 22 H 21 H 12, calculated Wl,. pt, if the cooperative cell 2 receives H 22 H 12 error, can not be obtained w 2,.
  • the cell 1 is based on the partial information H 22 H 12 of the jointly received channel information.
  • Pt is sent to cell 2 for determining the next collaborative scheduling.
  • joint channel H 2 cell as received ", H 22, H 21, H 12, calculating w 2,. Pt, 1 receiving cells cooperating H", H 21 there is an error, you can not be obtained Wl. Pt, can not determine the coordinated scheduling a next, the cell 2 according to the partial information H channel information joint reception ", H 21, calculate w. pt, cells 2 Wl. pt transmitted to the cell 1 via the X2 interface, with Determine the next collaborative scheduling.
  • the base station joint reception can further improve the uplink reception accuracy, and use the reception result to perform calculation at the cooperative base station, and only transmit the result to the uplink reception error cell, so that the capacity of the mutual interface is reduced.
  • the UE1 and the UE2 use the implicit feedback to send the channel data, which is mainly based on the pre-coding feedback mode, such as the channel quality CQI, PMI, and RI of the long-term feedback statistics, as shown in FIG. 5, which specifically includes: Step 1: The UE sends channel data.
  • the channel data of the feedback may be a differential codebook, a WCI/BCI codebook index, etc.
  • the feedback content includes a channel quality CQI, a serving cell preferred PMI, an RI, and a Worst Companies index of the coordinated cell.
  • PMI corresponding to severe cell interference, the best matching coordinated cell BCI (best Companion PMI), and further the UE1 said serving cell celll, UE2 serving cell is Cell2, UE1 needs to feed H "and H 12 corresponding serving cell PMI and The PMI of the cooperating cell (that is, the PMI with the strongest interference from the cooperating cell to UE1).
  • ⁇ ⁇ H ⁇ w ⁇ s ⁇ + H 2 w 2 s 2 + n
  • ⁇ the PMI of UE 1
  • w 2 the PMI of UE 2.
  • the SINR of UE1 is calculated as follows: Here is the transmit power of message i of cell i, and W contains interference and noise from other cells. Sound power. It can be seen that the SINR of UE 1 is a function of 1 ⁇ and ⁇ .
  • the PMI of cell 2 (the strongest interfering cell) is recommended to satisfy the following
  • ⁇ is the set of all PMIs
  • ⁇ is the SINR threshold. It can be seen that ⁇ plays an important role in the PMI coordination process. When this threshold is large, the restrictions on interference to other cells are more strict, and the number of PMIs used for the interfering cell is smaller. Or calculate the throughput of each layer according to the SINR, and the PMI corresponding to the maximum throughput is the codeword corresponding to the cell.
  • the average of all the bandwidths is determined, the rank of the channel is determined, and the codeword w is selected in the codebook of the corresponding rank to traverse the following formula:
  • the selected channel is the regional interference channel
  • the w corresponding to the maximum value is used as the interference feature vector feedback WCI, and the trace is considered to be the BCI, if the selected channel is the local cell
  • the channel corresponding to w is the optimal PMI.
  • the joint feedback model is used, that is, UE1 feedback measurement.
  • Step 2 The eNB receives channel data.
  • the base station Since it is a joint transmission, the base station uses joint reception.
  • the eNB1 of the cell 1 receives the PMI1 and the WCI2 measured by the UE1 of the local cell, and receives the PMI1 and WCI1 fed back by the neighboring cell UE2 according to the scheduling result of the neighboring cell.
  • Step 3 The eNB performs downlink cooperation calculation according to the received information.
  • the eNB1 receives the PMI1 fed back by the UE1, the WCI2 is correct, and receives the PMI2 fed back by the UE2, and the WCI1 is correct, and the eNB2 receives the PMI2 fed back by the UE2, and the WCI1 is correct and receives the PMI1 fed back by the UE1, and the WCI2 is correct. , for collaborative scheduling.
  • the eNB1 receives the PMI1 fed back by the UE1, and the WCI2 is correct, but receives the PMI2 fed back by the UE2, WCI1 is wrong, and the eNB2 receives the UE2 counter.
  • the PMI2 and WCI1 are fed correctly, but the PMI1 and WCI2 errors received by the UE1 are received, and the correct WCI2, WCI1 is obtained through the X2 interface interaction, that is, the cell 1 interacts with the cell 2 in one-way interaction WCI2, that is, the cell 2 interacts with the cell 1 in one-way interaction WCI1.
  • the cell receives the UE information error of the local cell, the UE information of the cell in the coordinated cell is correctly received, and the coordinated cell receives the correct local cell information interaction. That is, eNB1 receives PMI1 fed back by UE1, WCI2 error but receives PMI2 fed back by UE2, WCI1 is correct, eNB2 receives PMI2 fed back by UE2, receives WCI1 error but receives PMI1 fed back by UE1, WCI2 is correct, and obtains correct PMI1 and PMI2 through X2 interface interaction, That is, the cell 1 interacts with the cell 2 in one-way interaction PMI2, that is, the cell 2 interacts with the cell 1 in one-way interaction PMI1.
  • the information of the UE1 information of the cell 1 is correct, the information of the UE2 of the coordinated cell is incorrect: that is, the eNB1 receives the PMI1 fed back by the UE1, the WCI2 is correct but receives the PMI2 fed back by the UE2, the WCI1 is incorrect, and the cell 2 receives the information of the UE2 information of the local cell, the coordinated cell UE1
  • the information is correct: eNB2 receives PMI2 fed back by UE2, WCI1 is wrong, eNB2 receives PMI1 fed back by UE1, WCI2 is correct, and obtains correct WCI1 and WCI2 through X2 interface interaction.
  • eNB1 receives
  • UE1 feeds back PMI1, WCI2 error but receives UE2 feedback PMI2, WCI1 is correct;
  • Cell 2 receives the correct UE information of the cell, and the coordinated cell UE information is incorrect:
  • eNB2 receives PMI2 fed back by UE2, WCI1 is correct but receives PMI1 fed back by UE1, WCI2 error
  • the eNB1 upper layer is triggered to start the next aperiodic measurement.
  • the cell 2 receives the information error of the cell, the information of the coordinated cell is correct: eNB2 receives the PMI2 fed back by the UE2, WCI1 is wrong, the eNB2 receives the PMI1 fed back by the UE1, and the WCI2 is correct; the cell 1 receives the correct information of the UE of the cell, and the coordinated cell UE information error: eNB1 receives PMI2 fed back by UE1, WCI2 is correct, eNB1 receives PMI2 fed back by UE2, WCI1 error, triggers eNB1 upper layer to start the next measurement.
  • the cell 1 receives the information of the UE1 and the neighboring cell UE2, the eNB1 receives the PMI1 fed back by the UE1, the WCI2 is incorrect, and receives the PMI2 fed back by the UE2, and the WCI1 error; the cell 2 receives the information of the UE2 and the coordinated cell UE1 of the local cell are correct: eNB2 receives PMI2 fed back by UE2, WCI1 is correct and receives PMI1 fed back by UE1, WCI2 is correct, and cell 2 transmits PMI1, WCI1 to cell 1 through X2 interface.
  • the cell 1 receives the information of the UE1 and the coordinated cell UE2, the eNB1 receives the PMI1 that is fed back by the UE1, and the WCI2 is correct and receives the PMI2 fed back by the UE2, and the WCI1 is correct; the cell 2 receives the information of the UE2 and the coordinated cell UE1 of the local cell: UE2 feeds back PMI2, WCI1 is wrong and receives PMI1 fed back by UE1, WCI2 is wrong, and cell 1 transmits PMI2, WCI2 to cell 2 through X2 interface.
  • the error can be further corrected through the X2 interface to obtain the correct information.
  • the following is the process of collaborative scheduling:
  • the respective cells obtain the PMI1, WCI2, and the cell 2 obtain PMI2 and WCI1 according to the obtained channel matrix. Then, the weight matching result is calculated according to the following formula.
  • the pairing is judged based on the calculated result °3 ⁇ 4.
  • the precoding matrix which is the coordinated UE of the own cell is directly selected.
  • the following also provides a method for obtaining channel data according to SRS and performing cooperative processing. As shown in FIG. 6, the method includes:
  • Step 1 The eNB obtains channel data.
  • Respective service cells obtained according to the cooperative uplink SRS channel data obtain an estimate of this cell UE1 as ENBL SRS obtain H ", eNBl estimated cooperating cells UE2 an SRS obtain H 21, eNB2 is estimated that the cell UE2 an SRS obtain H 22, eNB2 estimated collaboration The SRS of the cell UE1 obtains H 12 .
  • Step 2 The eNB performs downlink cooperation calculation according to the obtained information.
  • the respective cells obtain the next collaborative adjustment according to the channel information measured by themselves, according to the reciprocity of the channel.
  • the optimal weight of the degree, according to the criterion of the maximum signal leakage ratio, the optimal solution i'opt under the above criteria, the channel information H Rail, H 21 obtained by the cell 1 is calculated.
  • an embodiment of the present invention further provides a system for cooperative scheduling of a CoMP terminal. As shown in FIG. 7, the system includes:
  • a channel data sending module 701 of the terminal configured to send channel data to the base station of the serving cell and the coordinated cell;
  • a channel data receiving module 702 of the base station configured to receive channel data transmitted by the serving terminal and the cooperative terminal;
  • the cooperative scheduling module 703 of the base station is configured to perform downlink cooperative scheduling according to the received channel data.
  • the channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data, and the channel data sending module of the terminal sends the serving cell channel data or cooperation periodically or aperiodically.
  • Cell channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data
  • the channel data sending module of the terminal sends the channel data of the serving cell and the cooperative cell channel data in a time-sharing manner or jointly.
  • the channel data receiving module of the base station only receives the serving cell channel data of the serving terminal and the coordinated cell channel data of the cooperative terminal, or the channel data receiving module of the base station receives the serving cell channel data and the cooperation of the serving terminal.
  • Cell channel data, and serving cell channel data and coordinated cell channel data of the cooperative terminal are examples of the channel data receiving module of the base station.
  • the system further includes an interaction module 704 of the base station, configured to: when the base station receives the channel data error, interact with the cooperative base station to obtain correct channel data or intermediate data processed by the correct channel data or Scheduling results.
  • an interaction module 704 of the base station configured to: when the base station receives the channel data error, interact with the cooperative base station to obtain correct channel data or intermediate data processed by the correct channel data or Scheduling results.
  • the channel data is the main feature of the channel, the main feature of the channel, or the covariance of the channel. Characteristics; or channel quality CQI, serving cell preferred PMI, RI, coordinated cell worst WCI, coordinated cell preferably matching BCI.
  • the foregoing embodiments and illustrations are described by taking two terminals and two base stations as an example.
  • the invention may, of course, be embodied in various other embodiments without departing from the spirit and scope of the invention.
  • the embodiment of the present invention further provides a base station, which is used for coordinated scheduling of a Coordinated Multipoint Transmission/Reception (CoMP) terminal, where the base station includes a channel data receiving module and a cooperative scheduling module, where:
  • CoMP Coordinated Multipoint Transmission/Reception
  • the channel data receiving module is configured to receive channel data sent by the terminal served by the base station and the coordinated terminal;
  • the cooperative scheduling module is configured to perform downlink cooperative scheduling according to channel data received by the channel data receiving module.
  • the channel data is explicit or implicit channel data, including serving cell channel data and coordinated cell channel data, where the channel data receiving module is configured to receive the base station service terminal and cooperate terminal period Or the serving cell channel data or coordinated cell channel data that is transmitted aperiodically.
  • the channel data receiving module of the base station is configured to: receive only the serving cell channel data of the serving terminal and the coordinated cell channel data of the cooperative terminal, or receive the serving cell channel data and the coordinated cell channel data of the serving terminal, and Cooperative terminal channel data and coordinated cell channel data of the cooperative terminal.
  • the foregoing base station further includes an interaction module, where the interaction module is configured to: when the received channel data is incorrect, interact with the cooperative base station to obtain correct channel data or intermediate data or scheduling result after processing the correct channel data.
  • Embodiments of the present invention measure channel information of a cooperative base station by using a UE, and cooperative base station cooperatively receives
  • the measurement information required for downlink cooperation is a cooperative reception criterion, that is, the measurement and feedback including the eNB to the UE also includes the SRS (sounding reference signal).
  • the measurement by the eNB makes the data exchange delay and capacity limitation between X2 not affect the performance of the system, and when the required measurement information is received incorrectly, the scheduling result is calculated by receiving the correct base station, and the error is received through the X2 interface interaction.
  • the base station gets the correct schedule.
  • the coordinated cell channel data of the UE may be received by the cooperative base station, and the coordinated base station performs scheduling according to the channel data fed back by the UE and the UE feedback channel data it serves, without receiving and combining;
  • the valid information can be further obtained through interaction, and only part of the valid information (such as the original data sent by the UE or the intermediate data or the scheduling result after processing the correct channel data) is performed.
  • the uplink and downlink cooperation of the embodiments of the present invention can reduce the transmission load of the X2 interface and reduce the transmission delay of the X2 interface without increasing the complexity, and provide a cooperative uplink reception.
  • the feedback structure improves the correct rate of uplink measurement feedback.
  • the terminal sends channel data to the base station of the serving cell and the coordinated cell, and after receiving the corresponding data, the base station can directly perform cooperative scheduling, without interaction with other base stations, and reduces the X2 interface.
  • the amount of information that is interacted with Without increasing the complexity, the transmission load of the X2 interface can be reduced, and the transmission delay of the X2 interface can be reduced, thereby solving the problem of large amount of interactive information between the base stations.

Landscapes

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

Abstract

一种CoMP终端的协作调度的方法和系统，所述方法包括：基站接收其服务的终端和其协作的终端发送的信道数据；以及，所述基站根据接收的信道数据进行下行协作调度。所述系统包括终端的信道数据发送模块、基站的信道数据接收模块和所述基站的协作调度模块，其中：所述信道数据发送模块设置为，向服务小区和协作小区的基站发送信道数据；所述信道数据接收模块设置为，接收所述基站服务的终端和协作的终端发送的信道数据；所述协作调度模块设置为，根据所述信道数据接收模块接收的信道数据进行下行协作调度。所述方法和系统解决了基站间交互信息量大的问题。

Description

CoMP终端的协作调度的方法和系统
技术领域
本发明涉及数字通信领域， 特别是涉及一种多点协作传输技术 ( Coordinated Multipoint transmission/reception, CoMP ) 中的 CoMP终端的 协作调度的方法和系统。
背景技术
作为一种多载波传输模式， 正交频分复用通过将一高速传输的数据流转 换为一组低速并行传输的数据流， 使系统对多径衰落信道频率选择性的敏感 度大大降低， 而循环前缀的引入， 又进一步增强了系统抗符号间干扰 ( Inter-symbol Interference, ISI )的能力， 除此之外的带宽利用率高、 实现简 单等特点使 OFDM在无线通信邻域的应用越来越广， 比如基于正交频分复用 多址的 LTE ( Long Term Evolution, 长期演进） 系统， 以及 LTE下一代的演 进 LTE-Advanced 系统 （第四代通信系统） 等都是基于正交频分复用 ( Orthogonal Frequency Division Multiplex , OFDM )技术的系统。
LTE-Advanced系统相对于 LTE 系统， 釆用了一些如 relay, 频谱聚合和
Figure imgf000002_0001
CoMP )等 新技术来增强系统性能。 CoMP最早来自爱立信文稿的定义， 即 Coordinated Multipoint transmission/reception。 引入 CoMP的初衷为了解决 OFDM系统中 小区间干扰问题， 提高小区边缘 UE的吞吐量， 如多个 eNB ( Evolved Node Base )协作消除 ICI ( InterCarrier Interference ) , 甚至将干扰信号变成期望信 号。 随着研究的深入， 发现在 LTE-A ( LTE-Advanced ) 中应用 CoMP, 可以 提高数据传输速率、小区边缘吞吐量、和 /或系统吞吐量。3GPP已经接受 CoMP 为 LTE-Advanced技术之一。
CoMP技术从传输方向上， 可分为上行 CoMP技术和下行 CoMP技术。 下行 CoMP是指多个协作小区联合为用户发送数据， 而上行 CoMP是指多个 协作小区联合接收 UE的数据。
CoMP协作小区集： 是网络根据小区的地理分布， 设定的一组发送点直 接或间接参与对 UE发生物理下行共享信道（ PDSCH , Physical Downlink Shared Channel ) 。
CoMP 测量小区集： 用户根据网络要求进行周期或非周期进行测量上报 相关的信道状态和统计信息的小区。
服务小区： 向移动台发送物理下行控制信道（ PDCCH, Physical Downlink Control Channel ) 的小区， 在通讯过程中只有一个服务小区。
目前标准中下行 CoMP技术主要分为以下两类： 联合处理（JP, Joint processing): 在每个协作小区集中的小区中都给用户发送相同的数据， 用户可 利用类似宏分集的增益改善接收效果； 协作调度 /波束赋形 （CS/CB , Coordinated Scheduling/Coordinated Beamforming)： 每个协作小区集中的小区 仅为自己小区中的用户发送数据， 并利用波束赋型技术使得信号对本小区用 户增强的同时， 对相邻小区同样资源上的用户干扰变弱， 以提高信噪比的方 式改善接收效果。 本发明实施方式以 CB方式作为工作模式。
假设 UE1的服务小区是小区 1 , 协作小区是小区 2 , UE2的服务小区是 小区 2 ,协作小区是小区 1 ,则现有下行 CoMP系统的基本原理，如图 1所示： 设有 N个 eNB, 每个小区只服务于一个 UE, 但每个小区服务的 UE处于 同时同频资源，且每个小区只为所服务 UE的下行发送数据，要使 UE在小区 边缘干扰最小， 需要选取最优预编码。
根据最大信漏噪比的准则， 最优预编码的计算公式为：
Figure imgf000003_0001
max SLN丄、R = max 上述准则下的最优解 是第」个小区中的 UE对本小区的信道^^关 于对其余所有基站 i≠ j信道之和 + ' ' ' + 的前若干大广义特征值对应 的广义特征矢量。
第 ' = 1，2，—，N小区的预编码矩阵为：
Figure imgf000004_0001
其中 表示求 R的前^大个特征值所对应的特征矢量， 表示 第 个小区中的 UE所使用的层数。 要使协作小区获得最优权值， eNB需要知道到本小区 UE的测量信道值 和到邻小区 UE的测量信道值， 按现有系统设计， UE1测量本小区 （即服务 小区）信道的测量值 和协作小区对本小区的干扰信道的测量值 H12 ,并将测 量的 H„、 H12值反馈到 UE1的服务基站 eNBl, UE2测量本小区的测量值 H22和 协作小区对本小区的干扰 H21，并将测量 H22、 H21值反馈到 UE2 的服务基站 eNB2, 即现有系统考虑小区 1用户 UE1对小区 2的用户 UE2的干扰信道 H21 只能通过 UE2反馈到邻小区 eNB2,同理，小区 2用户 UE2对小区 1用户 UE1 的干扰信道 H12只能通过 UE1反馈到邻小区 eNBl , 要计算本小区协作权值就 需要在 eNB之间进行信道数据的交互。
当 CoMP集合内的小区隶属于不同的基站时可以通过 X2接口互联进行 消息传递， 完成上行协作和下行协作， X2接口由于时延容量等瓶颈限制了 CoMP 的性能。 现有技术及提案讨论基本独立讨论上行协作和下行协作， 而 上行协作仅限于联合接收， 即以包的类型分为 TB ( Transport Block ) 、 CB ( Code Block ) 、 Soft bit level、 IQ sample (per antenna) level等, 再进一步联 合接收。 现有系统存在的以下问题：
基站间的协作必须通过 X2接口交互大量信道信息； 没有考虑上行协作 接收在下行 CoMP系统的应用； 通过 X2接口存在时延较大问题； 目前的提 案及专利分析主要以包的类型 TB ( Transport Block ) 、 CB ( Code Block ) 、 Soft bit level, IQ sample (per antenna) level等， 还没有考虑到信息的在对端的 有效性， 有效信息的交互可以减少交互信息。 发明内容
本发明实施方式要解决的技术问题是提供一种 CoMP终端的协作调度的 方法和系统， 以解决基站间交互信息量大的问题。
为解决以上技术问题， 本发明实施方式提供了一种 CoMP终端的协作调 度的方法， 该方法包括：
基站接收其服务的终端和其协作的终端发送的信道数据； 以及
所述基站根据接收的信道数据进行下行协作调度。
可选地， 所述信道数据为显式或隐式的信道数据， 包括服务小区信道数 据和协作小区信道数据， 所述基站是接收其服务的终端和其协作的终端周期 或非周期发送的所述服务小区信道数据或所述协作小区信道数据。
可选地， 所述基站是接收其服务的终端和其协作的终端分时发送服务小 区的信道数据和协作小区信道数据。
可选地， 所述基站仅接收其服务的终端的服务小区信道数据和其协作的 终端的协作小区信道数据， 或所述基站接收其服务的终端的服务小区信道数 据和协作小区信道数据， 以及协作终端的服务小区信道数据和协作小区信道 数据。
可选地， 在所述基站进行下行协作调度前， 该方法还包括， 若所述基站 接收信道数据错误， 所述基站与其协作基站交互获取正确的信道数据或对正 确的信道数据进行处理后的中间数据或调度结果。
为解决以上技术问题， 本发明实施方式还提供了一种 CoMP终端的协作 调度的系统， 该系统包括终端的信道数据发送模块、 基站的信道数据接收模 块和所述基站的协作调度模块， 其中：
所述信道数据发送模块， 设置为向服务小区和协作小区的基站发送信道 数据；
所述信道数据接收模块， 设置为接收所述基站服务的终端和协作的终端 发送的信道数据；
所述基站的协作调度模块， 设置为根据所述信道数据接收模块接收的信 道数据进行下行协作调度。
可选地， 所述信道数据为显式或隐式的信道数据， 包括服务小区信道数 据和协作小区信道数据， 所述终端的信道数据发送模块是设置为周期或非周 期发送所述服务小区信道数据或协作小区信道数据。
可选地， 所述终端的信道数据发送模块是设置为分时或联合发送服务小 区的信道数据和协作小区信道数据。
可选地， 所述基站的信道数据接收模块是设置为： 仅接收服务终端的服 务小区信道数据和协作终端的协作小区信道数据， 或， 接收服务终端的服务 小区信道数据和协作小区信道数据， 以及协作终端的服务小区信道数据和协 作小区信道数据。
可选地， 所述系统还包括基站的交互模块， 所述交互模块设置为： 在所 述基站接收信道数据错误时， 与协作基站交互获取正确的信道数据或对正确 的信道数据进行处理后的中间数据或调度结果。 本发明实施方式还提供了一种基站， 用于多点协作传输（CoMP)终端的 协作调度， 所述基站包括信道数据接收模块和协作调度模块， 其中：
所述信道数据接收模块设置为， 接收所述基站服务的终端和协作的终端 发送的信道数据；
所述协作调度模块设置为， 根据所述信道数据接收模块接收的信道数据 进行下行协作调度。 上述基站中： 所述信道数据为显式或隐式的信道数据， 包括服务小区信 道数据和协作小区信道数据， 所述信道数据接收模块是设置为接收所述基站 服务的终端和协作的终端周期或非周期地发送的所述服务小区信道数据或协 作小区信道数据。 上述基站中： 所述基站的信道数据接收模块是设置为： 仅接收服务终端 的服务小区信道数据和协作终端的协作小区信道数据， 或， 接收服务终端的 服务小区信道数据和协作小区信道数据以及协作终端的服务小区信道数据和 协作小区信道数据。
上述基站中， 还包括交互模块， 所述交互模块设置为： 在接收到的信道 数据错误时， 与协作基站交互获取正确的信道数据或对正确的信道数据进行 处理后的中间数据或调度结果。 本发明实施方式 CoMP终端的协作调度方法和系统中， 终端向服务小区 和协作小区的基站发送信道数据， 基站接收相应数据后， 可以直接进行协作 调度， 无需与其他基站进行交互， 减少了 X2接口交互的信息量。
附图概述
图 1为 CoMP系统的基本原理示意图；
图 2为本发明实施方式 CoMP终端的协作调度的方法的示意图； 图 3为应用实例一显示反馈的示意图， 其中 UE釆用分时发送方式 1 ; 图 4为应用实例一显示反馈的另一示意图，其中 UE釆用分时发送方式 2; 图 5为应用实例二隐式反馈的示意图。
图 6为本发明实施例的另一协作调度方法示意图；
图 7为本发明实施方式 CoMP终端的协作调度的系统的模块结构示意图。 本发明的较佳实施方式
本发明实施方式 CoMP终端的协作调度方法和系统的主要思想是， 终端 向服务小区和协作小区的基站发送信道数据， 基站接收相应数据后， 可以直 接进行协作调度， 无需与其他基站进行交互， 减少了 X2接口交互的信息量。
本发明实施方式 CoMP终端的协作调度的方法， 如图 2所示， 该方法包 括：
步骤 201 : 终端向服务小区和协作小区的基站发送信道数据；
对 UE而言， 若本小区为服务小区， 则该 UE为该小区的服务 UE; 若本 小区为协作小区， 该 UE为该小区的协作 UE。
UE测量服务小区的信道和协作小区的信道 (也称干扰信道）， 得到服务 小区信道数据和协作小区信道数据 (也称协作小区干扰信道数据 ) 。
可理解地， 终端（UE )发送信道数据前， 根据具体发送的信道数据特点， 需要先测量， 或对测量值进行处理。 下行测量： 首先 UE根据小区配置的 CSI-RS或其它信息进行本小区和协 作小区的信道测量。 根据高层的调度信息进行计算、 组成测量报告， 并向其 服务小区的基站和协作小区的基站发送。 支持显示反馈的信道数据或隐式反 馈信道数据。 显式反馈是指用户测量到信道状况后 （例如： 频域信道响应信 息） ， 不对该信息进行任何处理， 直接反馈给基站， 使基站获取完全的信道 响应信息。 对于显示反馈， 测量报告包括服务小区的信道数据和 /或协作小区 的干扰信道数据。 隐式反馈是指用户在测量到信道状况后， 对得到的信道信 息进行处理， 转化成特定的量化数值反馈给基站。 对于隐式反馈， 测量报告 可以上 4艮本小区最好 PMI和最坏 PMI。
上行测量： UE发送上行测量 SRS,协作小区的基站对该 UE的 SRS进行 测量， 获得本小区 UE的信道信息和邻区 UE的信道信息。
所述信道数据包括服务小区信道数据和协作小区信道数据， 所述终端周 期或非周期发送所述服务小区信道数据或协作小区信道数据。
可选地， 所述终端可分时或联合发送服务小区的信道数据和协作小区信 道数据。
其中 , 现有系统 CQI ( channel quality indication ) 、 PMI ( recoding matrix Indicator), RI ( rank indication )测量报告可以是周期的， 也可以是非周期的， 可以使用 PUSCH进行反馈， 也可以使用 PUCCH进行反馈， 可以是宽带的、 也可以是子带反馈， 本发明实施方式中， UE需反馈服务小区的信道数据， 也 需要可以反馈协作小区的信道数据， 其中反馈方法包括以下几种：
1、 UE周期反馈服务小区的信道数据， 非周期反馈协作小区的信道数据， 由协作小区的基站通知该 UE非周期测量的调度过程。
2、 UE分别周期反馈服务小区的信道数据和协作小区的信道数据， 并由 服务小区基站和协作小区基站通知其调度信息。
3、 UE釆用周期或非周期的方式联合反馈服务小区的信道数据和协作小 区的信道数据， 由基站通知其调度信息， 调度周期可以是周期的， 也可以是 非周期的。
由调度模式由基站高层信令配置， 所有协作小区的子带高层配置相同 。 其中， 测量报告可以是显示信道反馈也可以是隐式信道反馈。 步骤 202: 基站接收其服务的终端和其协作的终端的发送的信道数据； 如果 UE分时反馈服务小区的信道数据和协作小区的信道数据， 相应的， 基站可以接收其服务的终端的服务小区信道数据和其协作的终端的协作小区 信道数据。 其中， 对于周期反馈， 基站根据交互的上行调度结果， 触发基站 的协作接收 UE反馈。 对于非周期反馈， 基站根据交互的调度结果， 触发基 站协作接收 UE反馈。
其中，对于选择接收， 即这种情况下基站仅接收对自己有用的信道信息， 无需基站间交互。 若基站所需信息接收完全错误， 还按原来的配置信息进行 下行协作， 等待下次反馈测量信息。 如果 UE联合反馈服务小区的信道数据和协作小区的信道数据， 则基站 接收所有 UE的反馈信息， 包括其服务的终端的服务小区信道数据和协作小 区信道数据， 以及协作终端的服务小区信道数据和协作小区信道数据。
对于联合接收， 即基站不仅接收对自己有用的信道信息， 也接收其服务 终端的协作小区的信道数据和其协作的终端的服务小区信道数据， 当其协作 的终端的服务小区基站任何信息接收错误， 可以请求该基站交互正确的反馈 信息接收正确后计算本小区的 PMI或直接请求交互处理之后的有用信息（如 中间数据或调度结果、 PMI ) 。
若基站无法从其他基站获得所需信息， 则由该基站指定的下一次调度。 步骤 203: 所述基站根据接收的信道数据进行下行协作调度。
其中， 所有协作基站接收正确则无需基站间的接口进行信息交互， 计算 本小区的下一次协作调度的结果。
以两小区两 UE协作为例说明本发明的具体实现方式。
如图 1所示， 移动终端 UE1位于小区 1中， 移动终端 UE2位于小区 2,
UE1和 UE2占用相同时频资源， 小区 1和小区 2相互干扰使各自 UE的性能 下降。 将小区 1和小区 2作为协作集， 确立 UE1和 UE2为配对用户， 交互测 量及上报方法， 通过各自的高层信令下发给服务 UE。 应用实例 1
该应用实例中， UE1和 UE2釆用显示反馈的方式发送信道数据， 具体包 括：
步骤一： UE发送信道数据；
对于每个 UE,如图 1所示的 UE1和 UE2,测量服务小区的信道 H„、 H22 , 根据高层的命令， 反馈的信道数据可以是信道主要特征即显示反馈， 如信道 H12、 H21或主要特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征。 测量协作小 区的信道 H12、 H21 , 根据高层的命令， 反馈的信道数据可以是信道 H12、 H21 , 或信道主要特征， 或其干扰信道的协方差 (Ri),或 (Ri) 的主要特征。 本发明实 施例 1以信道 H作为反馈， 其他信道特征的反馈可以以此为例进行扩展。
由于是显示反馈， 反馈内容报告信道矩阵、 信道矢量、 特征值等， 显示 反馈开销量比较大， 本发明实施例 1釆用分时反馈模型， 其他反馈模型可以 以此为例进行扩展。
如图 3所示， 可以根据协作准则即在不损失自己的情况下降低对协作小 区用户的干扰， UE1和 UE2分时发送方式 1 , 如， 在第一时刻分别向其服务 小区的基站反馈服务小区的信道值， 在第二时刻分别向其协作小区的基站反 馈协作小区的信道值。
如图 4所示， UE1和 UE2另一种分时发送方式 2, 如在第一时刻向其服 务小区的基站和协作小区的基站反馈服务小区的信道值， 在第二时刻向其服 务小区的基站和协作小区的基站反馈本服务小区的信道值和协作小区的信道 值。
步骤二： eNB接收信道数据；
对应于 UE1和 UE2分时发送方式 1 , 在第一时刻， eNBl接收其服务的 UE1 反馈的 H„或信道主要特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征， eNB2接收其协作的 UE2反馈的 H22或信道主要特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征，在第二时刻 eNBl接收其协作的 UE2反馈的 H21或信道主要 特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征， eNB2接收其协作的 UE1反 馈的 H12或信道主要特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征。 其中信道 的主要特征可以为特征值和特征矩阵。
对应于 UE1和 UE2的分时发送方式 2, 在第一时刻 eNBl接收其服务的 UE1反馈的 H„或信道主要特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征， 以 及其协作的 UE2反馈的 H22或信道主要特征，或信道的协方差 (Ri),或 (Ri) 的主 要特征， eNB2接收其协作的 UE2反馈的 H„或信道主要特征， 或信道的协方 差 (Ri),或 (Ri) 的主要特征， 以及其服务的 UE2反馈的 H22或信道主要特征，或 信道的协方差 (Ri),或 (Ri) 的主要特征； 在第二时刻 eNBl接收其协作的 UE2 反馈的 H21或信道主要特征， 或信道的协方差 (Ri),或 (Ri) 的主要特征， 以及其 服务的 UE1反馈的 H12或信道主要特征，或信道的协方差 (Ri),或 (Ri) 的主要特 征， eNB2接收其服务的 UE2反馈的 H21或信道主要特征，或信道的协方差 (Ri), 或 (Ri) 的主要特征， 以及其协作的 UE1反馈的 H12或信道主要特征， 或信道 的协方差 (Ri),或 (Ri) 的主要特征。
步骤三： eNB根据接收的信息进行下行协作的计算。
对于基站的选择接收， 各自小区根据自己获得的信道信息获得下次协作 调度的最优权值 ,根据最大信漏噪比的准则，上述准则下的最优解、 i'opt 小区 1根据获得的信道信息 H„ H21 , 计算：
wu t = max SL R! = max ~ H H ^ 11 ~~ -——
wi wi w, HJJHJJW, + αλ1 小区 1根据获得的信道信息 H22 H12 , 计算:
w9 2, nonptt =
Figure imgf000011_0001
对于基站的联合接收， 可以根据各自所需提取调度信息， 也可以根据接 收的正确或错误信息进一步交互获得所需信息。为了减少交互信息的数据量， 由接收正确小区， 分别计算本小区的发送权值， 当获知协作小区接收错误时， 计算协作小区的发送权值， 将协作小区的发送权值通过 X2接口发送给接收 信道信息错误的小区，如小区 1接收的联合信道 H„ H22 H21 H12，计算 Wl,。pt , 如果协作小区 2接收 H22 H12有错误， 无法获得 w2,。pt , 因此无法确定下一下 次的协作调度， 则小区 1根据联合接收的信道信息的部分信息 H22 H12 , 计 算 W2,。pt , 通过 X2接口将 w2。pt发送给小区 2 , 用于决定下一次的协作调度。 反 之， 如小区 2接收的联合信道 H„、 H22、 H21、 H12 , 计算 w2,。pt , 协作小区 1 接收 H„、 H21有错误， 无法获得 Wl。pt , 因此无法确定下一下次的协作调度， 则小区 2根据联合接收的信道信息的部分信息 H„、 H21 , 计算 w。pt , 小区 2 通过 X2接口将 Wl。pt发送给小区 1 , 用于决定下一次的协作调度。
和基站选择接收相比，基站联合接收可以进一步提高上行的接收正确性， 并利用接收结果在协作基站进行运算， 仅将结果发送给上行接收错误小区， 使相互接口的容量降低。
应用实例 2
该应用实例中， UE1和 UE2釆用隐式反馈的方式发送信道数据， 主要是 基于预编码的反馈方式， 如长期反馈统计的信道质量 CQI、 PMI、 RI, 如图 5 所示， 具体包括： 步骤一， UE发送信道数据；
由于是隐式反馈， 反馈的信道数据可以是差分码本， WCI/BCI码本索引 等， 反馈内容包括信道质量 CQI、 服务小区首选 PMI、 RI、 协作小区最坏 WCI(Worst Companies index)即产生严重小区干扰对应的 PMI、 协作小区最好 匹配 BCI(Best Companion PMI)等， 进一步说 UE1的服务小区为 celll , UE2 的服务小区为 cell2, UE1需要反馈 H„和 H12对应的服务小区 PMI和协作小区 的 PMI (也就是协作小区对 UE1干扰最强的 PMI ) 。
对 UE1的接收信号：
Υλ = H^w^s^ + H2w2s2 + n 这里 表示从小区 i到 UEi的信道增益， ^是 UE 1的 PMI, w2是 UE 2 的 PMI。 这个模型假设小区 2是对 UE1干扰最强的小区， n包含了来自其他 小区的干扰和 AWGN。 UE1的 SINR计算如下：
Figure imgf000012_0001
这里 是小区 i的消息 i的发射功率， W包含了来自其他小区的干扰和噪 声功率。 可以看到 UE 1的 SINR是1^和 ^的函数。 因此推荐小区 2(最强的干 扰小区）的 PMI满足下面
Figure imgf000013_0001
这里 Ω是所有的 PMI集合， ^是 SINR门限。 可以看到 ^在 PMI协调过程中起着很重要的作用。 当这个门限很大时， 对其他小区干扰的 限制更严格， 则用于干扰小区的 PMI数量更少。 或根据 SINR计算各层的吞 吐量， 最大的吞吐量对应的 PMI即为本小区所对应的码字。
也可以釆用简化算法：
首先， 对所有带宽的 作平均， 确定信道的秩， 在对应秩的码本里选 取码字 w遍历以下公式：
wfH Hwf
对上式求迹（近似看成干扰强度的大小） ， 如果选取的信道是部区干扰 信道， 最大值对应的 w作为干扰特征矢量反馈 WCI, 迹最小认为是 BCI, 如 果选取的信道是本小区信道最大值对应的 w作为最优 PMI。
由于是隐式反馈开销量不大， 釆用联合反馈模型， 即 UE1 反馈测量的
PMI1、 WCI2, UE2反馈 PMI2、 WCI2。
步骤二、 eNB接收信道数据；
由于是联合发送， 基站釆用联合接收。
小区 1的 eNBl接收本小区 UE1测量的 PMI1、 WCI2, 根据邻小区的调 度结果接收邻小区 UE2反馈的 PMI1、 WCI1。
步骤三： eNB根据接收的信息进行下行协作的计算。
如果本小区和协作小区接收均正确， 即 eNBl 接收 UE1 反馈的 PMI1,WCI2正确 ,且接收 UE2反馈的 PMI2,WCI1正确 ,同时 eNB2接收 UE2 反馈的 PMI2,WCI1正确且接收 UE1反馈的 PMI1,WCI2正确，进行协作调度。
如果本小区接收本小区 UE信息正确，协作小区 UE信息错误，将协作小 区接收正确的信息通过 X2接口， 交互到本小区。 即， eNBl接收 UE1反馈的 PMI1,WCI2正确 , 但接收 UE2反馈的 PMI2,WCI1错误， eNB2接收 UE2反 馈的 PMI2,WCI1正确 , 但接收 UEl反馈的 PMI1,WCI2错误， 通过 X2接口 交互获得正确 WCI2,WCI1 , 即小区 1向小区 2单向交互 WCI2, 即小区 2向 小区 1单向交互 WCI1。
如果本小区接收本小区 UE信息错误，协作小区本小区 UE信息接收正确， 将协作小区接收正确的本小区信息交互。 即， eNBl 接收 UEl 反馈的 PMI1,WCI2错误但接收 UE2反馈的 PMI2,WCI1 正确 , eNB2接收 UE2反馈 的 PMI2,WCI1错误但接收 UE1反馈的 PMI1,WCI2正确 , 通过 X2接口交互 获得正确 PMI1和 PMI2, 即小区 1向小区 2单向交互 PMI2, 即小区 2向小 区 1单向交互 PMI1。
如果小区 1接收本小区 UE1信息的信息正确， 协作小区 UE2信息错误： 即 eNBl接收 UE1反馈的 PMI1,WCI2正确但接收 UE2反馈的 PMI2,WCI1错 误,小区 2接收本小区 UE2信息错误， 协作小区 UE1信息正确： eNB2接收 UE2反馈的 PMI2,WCI1错误， eNB2接收 UE1反馈的 PMI1,WCI2正确，通过 X2接口交互获得正确 WCI1和 WCI2。
如果小区 1接收本小区的信息错误， 协作小区的信息正确： eNBl接收
UE1反馈的 PMI1,WCI2错误但接收 UE2反馈的 PMI2,WCI1正确； 小区 2接 收本小区 UE信息正确， 协作小区 UE信息错误： eNB2接收 UE2反馈的 PMI2,WCI1正确但接收 UEl反馈的 PMI1,WCI2错误，触发 eNBl高层启动下 一次非周期测量。
或反之，如果小区 2接收本小区的信息错误，协作小区的信息正确： eNB2 接收 UE2反馈的 PMI2,WCI1错误， eNB2接收 UE1反馈的 PMI1,WCI2正确； 小区 1接收本小区 UE信息正确， 协作小区 UE信息错误： eNBl接收 UE1反 馈的 PMI2,WCI2正确 , eNBl接收 UE2反馈的 PMI2,WCI1错误， 触发 eNBl 高层启动下一次测量。
如果小区 1接收本小区 UE1和邻小区 UE2信息均错误： eNBl接收 UE1 反馈的 PMI1,WCI2错误且接收 UE2反馈的 PMI2,WCI1错误； 小区 2接收本 小区 UE2和协作小区 UE1信息均正确： eNB2接收 UE2反馈的 PMI2,WCI1 正确且接收 UE1反馈的 PMI1,WCI2正确,小区 2向小区 1通过 X2接口单向 传输 PMI1,WCI1。 如果小区 1接收本小区 UE1和协作小区 UE2信息均正确： eNBl接收 UE1 反馈的 PMI1,WCI2正确且接收 UE2反馈的 PMI2,WCI1正确； 小区 2接收本 小区 UE2和协作小区 UE1信息均错误： eNB2接收 UE2反馈的 PMI2,WCI1 错误且接收 UE1反馈的 PMI1,WCI2错误,小区 1向小区 2通过 X2接口传输 PMI2,WCI2 。
由于双基站接收， 可以通过 X2接口进一步纠正错误， 获得正确信息。 以下为进行协作调度的过程：
各自小区根据获得的信道矩阵， 如小区 1获得 PMI1,WCI2,小区 2 获得 PMI2和 WCI1,则根据以下公式计算权值匹配结果。
Figure imgf000015_0001
根据计算的结果 °¾进行配对的判定。 根据仿真值或经验值预设定一个门 限值 ^， 那么：
当《y≥^， 则^ ^和^ 对应的方向接近正交， 用^ 对本小区参与协作 的 UE传输时， 对邻小区的参与协作的 UE干 4尤4艮小， 因此， 判定用户可以进 行协作配对；
当《y≤^， 则^ ^和^^对应的方向接近平行， 用^ 对本小区参与协作 的 UE传输时，对邻小区的参与协作的 UE干 艮大，判定用户不能协作配对。
对于确定配对后的用户直接选取 作为本小区协作 UE的预编码矩阵。 以下还提供一种根据 SRS得到信道数据并进行协作处理的方法， 如图 6 所示， 包括：
步骤一、 eNB获得信道数据；
各自的服务小区根据协作上行 SRS获得信道数据， 获得如 eNBl估计本 小区 UE1的 SRS获得 H„ , eNBl估计协作小区 UE2的 SRS获得 H21 , eNB2 估计本小区 UE2的 SRS获得 H22 , eNB2估计协作小区 UE1的 SRS获得 H12。
步骤二、 eNB根据获得的信息进行下行协作的计算。
各自小区根据自己测量的信道信息， 根据信道的互易性获得下次协作调 度的最优权值， 根据最大信漏噪比的准则， 上述准则下的最优解 i'opt 小区 1获得的信道信息 H„、 H21 , 计算
wu t = max SL R! = max ~ H H ^ 11 ~~ -——
wi wi w, HJJHJJW, + αλ1
J、区 1获得的信道信息 H"、 H17
。τ τ τπ
w,nnt = max SL R,
Figure imgf000016_0001
为了实现以上方法， 本发明实施方式还提供了一种 CoMP终端的协作调 度的系统， 如图 7所示， 该系统包括：
终端的信道数据发送模块 701 , 其设置为向服务小区和协作小区的基站 发送信道数据；
基站的信道数据接收模块 702, 其设置为接收服务终端和协作终端的发 送的信道数据；
所述基站的协作调度模块 703 , 其设置为根据接收的信道数据进行下行 协作调度。
可选地， 所述信道数据为显式或隐式的信道数据， 包括服务小区信道数 据和协作小区信道数据， 所述终端的信道数据发送模块周期或非周期发送所 述服务小区信道数据或协作小区信道数据。
所述终端的信道数据发送模块分时或联合发送服务小区的信道数据和协 作小区信道数据。
可选地， 所述基站的信道数据接收模块仅接收服务终端的服务小区信道 数据和协作终端的协作小区信道数据， 或， 所述基站的信道数据接收模块接 收服务终端的服务小区信道数据和协作小区信道数据， 以及协作终端的服务 小区信道数据和协作小区信道数据。
可选地， 所述系统还包括基站的交互模块 704, 其设置为在所述基站接 收信道数据错误时， 与协作基站交互获取正确的信道数据或对正确的信道数 据进行处理后的中间数据或调度结果。
可选地， 所述信道数据为信道、 信道的主要特征或信道的协方差的主要 特征； 或信道质量 CQI、 服务小区首选 PMI、 RI、 协作小区最坏 WCI、 协作 小区最好匹配 BCI。
前述实施例和示意都是以 2个终端及 2个基站的方式为例进行说明的。 当然， 本发明还可有其它多种实施例， 在不背离本发明精神及其实质的情况 变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围， 比如多个 UE和 /或多个基站。 本发明实施方式还提供了一种基站， 用于多点协作传输（Coordinated Multipoint transmission/reception , CoMP)终端的协作调度， 所述基站包括信道 数据接收模块和协作调度模块， 其中：
所述信道数据接收模块设置为， 接收所述基站服务的终端和协作的终端 发送的信道数据；
所述协作调度模块设置为， 根据所述信道数据接收模块接收的信道数据 进行下行协作调度。 上述基站中： 所述信道数据为显式或隐式的信道数据， 包括服务小区信 道数据和协作小区信道数据， 所述信道数据接收模块是设置为接收所述基站 服务的终端和协作的终端周期或非周期地发送的所述服务小区信道数据或协 作小区信道数据。 上述基站中： 所述基站的信道数据接收模块是设置为： 仅接收服务终端 的服务小区信道数据和协作终端的协作小区信道数据， 或， 接收服务终端的 服务小区信道数据和协作小区信道数据以及协作终端的服务小区信道数据和 协作小区信道数据。
上述基站中， 还包括交互模块， 所述交互模块设置为： 在接收到的信道 数据错误时， 与协作基站交互获取正确的信道数据或对正确的信道数据进行 处理后的中间数据或调度结果。
本发明实施方式通过 UE测量协作基站的信道信息， 协作基站协同接收 的方式， 通过上行协作接收， 可以无需交互或按信息内容进行交互， 以保证 下行协作所需要的测量信息为协作接收准则， 即包括 eNB到 UE的测量及反 馈也包括 UE发送 SRS ( sounding reference signal ) eNB的测量， 使得 X2之 间的数据交换时延和容量限制不影响系统的性能， 并在所需测量信息接收错 误时， 通过接收正确的基站计算调度结果， 通过 X2接口交互使接收错误的 基站获得正确的调度。
本发明实施方式中 UE的协作小区信道数据可以由其协作基站进行接收， 协作基站根据其协作的 UE反馈的信道数据和其服务的 UE反馈信道数据进行 调度， 无需接收合并； 在协作接收有部分错误时， 可以进一步通过交互获得 有效信息， 仅交互部分有效信息 （如 UE发送的原始数据或对正确的信道数 据进行处理后的中间数据或调度结果 ) 。
与现有技术相比较， 本发明实施方式上下行协作相结合， 在不增加复杂 度的情况下， 可以降低 X2接口的传输负载， 降低 X2接口的传输时延， 提供 一种有利于上行协作接收的反馈结构， 提高上行测量反馈的正确率。
工业实用性
上述技术方案的 CoMP终端的协作调度方法和系统中， 终端向服务小区 和协作小区的基站发送信道数据， 基站接收相应数据后， 可以直接进行协作 调度， 无需与其他基站进行交互， 减少了 X2接口交互的信息量。 在不增加 复杂度的情况下， 可以降低 X2接口的传输负载， 降低 X2接口的传输时延， 从而解决基站间交互信息量大的问题。

Claims

权 利 要 求 书
1、 一种多点协作传输 （CoMP)终端的协作调度的方法， 包括：
基站接收其服务的终端和其协作的终端发送的信道数据； 以及
所述基站根据接收的信道数据进行下行协作调度。
2、 如权利要求 1所述的方法，其中： 所述信道数据为显式或隐式的信道 数据， 包括服务小区信道数据和协作小区信道数据；
在所述基站接收其服务的终端和其协作的终端发送的信道数据的步骤 中， 所述基站是接收其服务的终端和其协作的终端周期或非周期地发送的所 述服务小区信道数据或所述协作小区信道数据。
3、 如权利要求 1所述方法，其中： 在所述基站接收其服务的终端和其协 作的终端发送的信道数据的步骤中， 所述基站是接收其服务的终端和其协作 的终端分时发送服务小区的信道数据和协作小区信道数据。
4、 如权利要求 1所述的方法，其中： 在所述基站接收其服务的终端和其 协作的终端发送的信道数据的步骤中， 所述基站仅接收其服务的终端的服务 小区信道数据和其协作的终端的协作小区信道数据， 或所述基站接收其服务 的终端的服务小区信道数据和协作小区信道数据以及其协作终端的服务小区 信道数据和协作小区信道数据。
5、 如权利要求 4所述的方法， 其中： 在所述基站进行下行协作调度前， 所述方法还包括： 若所述基站接收信道数据错误， 所述基站与其协作基站交 互获取正确的信道数据或对正确的信道数据进行处理后的中间数据或调度结 果。
6、 一种多点协作传输 （CoMP)终端的协作调度的系统， 包括终端的信道 数据发送模块、基站的信道数据接收模块和所述基站的协作调度模块， 其中： 所述信道数据发送模块设置为， 向服务小区和协作小区的基站发送信道 数据；
所述信道数据接收模块设置为， 接收所述基站服务的终端和协作的终端 发送的信道数据；
所述协作调度模块设置为， 根据所述信道数据接收模块接收的信道数据 进行下行协作调度。
7、 如权利要求 6所述的系统，其中： 所述信道数据为显式或隐式的信道 数据， 包括服务小区信道数据和协作小区信道数据， 所述终端的信道数据发 送模块是设置为周期或非周期地发送所述服务小区信道数据或协作小区信道 数据。
8、 如权利要求 6所述系统，其中： 所述终端的信道数据发送模块是设置 为分时或联合发送服务小区的信道数据和协作小区信道数据。
9、 如权利要求 6所述的系统，其中： 所述基站的信道数据接收模块是设 置为：仅接收服务终端的服务小区信道数据和协作终端的协作小区信道数据， 或， 接收服务终端的服务小区信道数据和协作小区信道数据以及协作终端的 服务小区信道数据和协作小区信道数据。
10、 如权利要求 6所述的系统，其中： 所述系统还包括基站的交互模块， 所述交互模块设置为： 在所述基站接收信道数据错误时， 与协作基站交互获 取正确的信道数据或对正确的信道数据进行处理后的中间数据或调度结果。
11、 一种基站， 包括信道数据接收模块和协作调度模块， 其中： 所述信道数据接收模块设置为， 接收所述基站服务的终端和协作的终端 发送的信道数据；
所述协作调度模块设置为， 根据所述信道数据接收模块接收的信道数据 进行下行协作调度。
12、 如权利要求 11所述的基站，其中： 所述信道数据为显式或隐式的信 道数据， 包括服务小区信道数据和协作小区信道数据， 所述信道数据接收模 块是设置为接收所述基站服务的终端和协作的终端周期或非周期地发送的所 述服务小区信道数据或协作小区信道数据。
13、 如权利要求 11所述的基站，其中： 所述基站的信道数据接收模块是 设置为： 仅接收服务终端的服务小区信道数据和协作终端的协作小区信道数 据， 或， 接收服务终端的服务小区信道数据和协作小区信道数据以及协作终 端的服务小区信道数据和协作小区信道数据。
14、 如权利要求 11所述的基站， 其还包括交互模块， 所述交互模块设置 为： 在接收到的信道数据错误时， 与协作基站交互获取正确的信道数据或对 正确的信道数据进行处理后的中间数据或调度结果。
PCT/CN2012/075573 2011-06-09 2012-05-16 Comp终端的协作调度的方法和系统 WO2012167687A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110153270.2 2011-06-09
CN2011101532702A CN102821473A (zh) 2011-06-09 2011-06-09 CoMP终端的协作调度的方法和系统

Publications (1)

Publication Number Publication Date
WO2012167687A1 true WO2012167687A1 (zh) 2012-12-13

Family

ID=47295465

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/075573 WO2012167687A1 (zh) 2011-06-09 2012-05-16 Comp终端的协作调度的方法和系统

Country Status (2)

Country Link
CN (1) CN102821473A (zh)
WO (1) WO2012167687A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104105211B (zh) * 2013-04-15 2018-01-19 电信科学技术研究院 传输调度方法和设备
CN104185215B (zh) * 2013-05-22 2017-11-14 普天信息技术研究院有限公司 控制信息的合并处理方法
CN104469960B (zh) * 2013-09-25 2019-12-10 中兴通讯股份有限公司 调度配置方法与装置
CN106105328B (zh) * 2014-12-05 2020-06-23 石戈夫 一种终端、网络设备和协作多点传输协作集选择方法
CN106658738B (zh) * 2015-08-07 2020-10-09 中国电信股份有限公司 一种多点协作传输方法和系统
CN107395332B (zh) * 2016-05-16 2020-01-10 华为技术有限公司 一种cqi确定方法、用户设备和基站

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101621835A (zh) * 2009-07-23 2010-01-06 北京航空航天大学 一种基于空中接口的CoMP分布式下行多用户调度方法
CN101692735A (zh) * 2009-08-20 2010-04-07 中国科学院上海微系统与信息技术研究所 一种协作多点传输场景下的隐式信道反馈方法
CN101820631A (zh) * 2009-02-27 2010-09-01 中国移动通信集团公司 一种移动通信系统基站之间的协作式调度方法和基站
WO2010101431A2 (en) * 2009-03-04 2010-09-10 Lg Electronics Inc. Method for performing comp operation and transmitting feedback information in a wireless communication system
CN102013952A (zh) * 2009-09-07 2011-04-13 夏普株式会社 信道状态信息获取方法、基站及用户设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101888665B (zh) * 2009-05-13 2013-03-13 普天信息技术研究院有限公司 一种基于本地调度器的多点协同传输方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101820631A (zh) * 2009-02-27 2010-09-01 中国移动通信集团公司 一种移动通信系统基站之间的协作式调度方法和基站
WO2010101431A2 (en) * 2009-03-04 2010-09-10 Lg Electronics Inc. Method for performing comp operation and transmitting feedback information in a wireless communication system
CN101621835A (zh) * 2009-07-23 2010-01-06 北京航空航天大学 一种基于空中接口的CoMP分布式下行多用户调度方法
CN101692735A (zh) * 2009-08-20 2010-04-07 中国科学院上海微系统与信息技术研究所 一种协作多点传输场景下的隐式信道反馈方法
CN102013952A (zh) * 2009-09-07 2011-04-13 夏普株式会社 信道状态信息获取方法、基站及用户设备

Also Published As

Publication number Publication date
CN102821473A (zh) 2012-12-12

Similar Documents

Publication Publication Date Title
CN110098852B (zh) 用于协调多点传输的csi定义和反馈模式
US9590749B2 (en) Terminal and method for calculating channel quality indication information
US9301175B2 (en) Configuration of interference measurement resources for enhanced downlink measurements and MU-MIMO
US20170366234A1 (en) Channel Feedback for Coordinated Multi-Point Transmission
US9154194B2 (en) Devices and methods related to improvements in coordinated multipoint transmission arrangements
TWI445341B (zh) Method of Determining Channel State in Cooperative Multipoint Transmission
US8855002B2 (en) Channel information feedback device and method thereof, and mode switching method, communication terminal device, and base station system using same
WO2013023522A1 (zh) 一种非周期csi的反馈方法和设备
US9337906B2 (en) Feedback and scheduling for coordinated multi-point (CoMP) joint transmission (JT) in orthogonal frequency division multiple access (OFDMA)
US9179332B2 (en) Artificial interference injection for channel state information reporting
WO2014063647A1 (zh) 一种确定信道状态信息的方法及终端
EP3437224B1 (en) Low complexity multi-configuration csi reporting
KR20120104593A (ko) 협력형 멀티포인트 송신에서 레이트 예측을 위한 방법 및 시스템
WO2010105566A1 (zh) Lte-a系统中信道测量导频的发送方法和装置
WO2018028256A1 (zh) 信道状态信息测量反馈方法及设备
WO2013051908A2 (ko) 협력 멀티 포인트 통신 시스템에서 채널상태정보 송수신 방법 및 장치
WO2014071638A1 (zh) 上报信道状态信息的方法、用户设备及基站
WO2012167687A1 (zh) Comp终端的协作调度的方法和系统
WO2013139139A1 (zh) 一种下行信道质量信息获取方法和装置
WO2014012509A1 (zh) 信道质量指示信息上报及确定方法和设备
CN107078774B (zh) Pucch上的高程pmi报告
WO2013044461A1 (zh) 信道状态信息的测量方法、用户设备及基站
EP2947939B1 (en) Method and device for scheduling resource in coordinated multi-point transmission
WO2014180449A1 (zh) 一种基于干扰对齐的预编码系统和方法
WO2015069055A1 (ko) 무선 통신 시스템에서 무선 통신 상태 측정 방법 및 이를 위한 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12797390

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12797390

Country of ref document: EP

Kind code of ref document: A1