WO2012051861A1 - 一种多点协作传输接收系统测量上报方法及系统 - Google Patents

一种多点协作传输接收系统测量上报方法及系统 Download PDF

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WO2012051861A1
WO2012051861A1 PCT/CN2011/075475 CN2011075475W WO2012051861A1 WO 2012051861 A1 WO2012051861 A1 WO 2012051861A1 CN 2011075475 W CN2011075475 W CN 2011075475W WO 2012051861 A1 WO2012051861 A1 WO 2012051861A1
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measurement
cell
rsrp
serving cell
comp
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French (fr)
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王文焕
姚珂
贺抗生
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ZTE Corp
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ZTE Corp
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Priority to JP2013515683A priority Critical patent/JP5593444B2/ja
Priority to EP11833767.4A priority patent/EP2574095B1/en
Priority to US13/703,082 priority patent/US9001734B2/en
Publication of WO2012051861A1 publication Critical patent/WO2012051861A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method and system for measuring a Coordinated Multipoint Transmission/Reception (CoMP) system.
  • CoMP Coordinated Multipoint Transmission/Reception
  • Orthogonal Frequency Division Multiplex (OFDM) technology converts a high-speed data stream into a set of low-speed parallel data streams to make the system multipath fading.
  • the sensitivity of channel frequency selectivity is greatly reduced.
  • the introduction of cyclic prefix further enhances the system's ability to resist inter-symbol interference (ISI).
  • ISI inter-symbol interference
  • the high bandwidth utilization and simple implementation make OFDM more and more widely used in the field of wireless communication, such as Long Term Evolution (LTE) system based on orthogonal frequency division multiplexing multiple access.
  • LTE next-generation evolved LTE-Advanced system fourth generation communication system
  • OFDM technology is all systems of OFDM technology.
  • LTE-Advanced systems use new technologies such as relay, spectrum aggregation and CoMP to enhance system performance.
  • 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 (User Equipment).
  • UE User Equipment
  • multiple eNBs Evolved Base Stations
  • ICI Inter-Cell Interference
  • the application of CoMP in LTE-Advanced can improve data transmission rate, cell edge throughput, and/or system throughput. Therefore, most companies are very optimistic about CoMP technology.
  • CoMP technology can be divided into uplink CoMP technology and downlink CoMP technology from the transmission direction.
  • DL CoMP downlink CoMP
  • JP Joint Process
  • CS Coordinatd Scheduling
  • CB Coordinatd Beamforming
  • CS/CB mode Only one of the nodes in the multipoint transmits data to the UE, similar to the increase Strong ICIC (Inter-Cell Interference Coordination), the collaboration point does not share data, but shares channel related information, such as semi-static ICIC, cooperative PMK Precoding Matrix Indicator, precoding matrix indication, and cooperative beamforming.
  • Strong ICIC Inter-Cell Interference Coordination
  • the data sent to the UE is transmitted by the eNB of the serving cell where the UE is located in the coordinated scheduling/beamformng mode; however, the scheduling decision is jointly controlled, such as controlling the generation of interference in the coordinated cell.
  • JP joint transmission mode Multiple points simultaneously send data to one UE to improve the quality of the received signal and/or eliminate interference to other UEs.
  • the base stations and terminals participating in CoMP cooperation mainly include:
  • Serving cell A cell that transmits a control channel to a terminal. In the process of communication between the terminal and the base station, there is generally only one serving cell.
  • Measurement Cell Set A set of cells in which the terminal performs periodic channel condition information measurement. The collection is semi-statically configured by the terminal serving cell.
  • Cooperative cell set is a set of cells that directly or indirectly participate in transmitting service data to a terminal.
  • CoMP can be used in the cell edge UE and the cell center UE in theory, but the SINR (Signal to Interference plus Noise Ratio) of the cell center UE is not high in the non-CoMP, and the throughput is high after using CoMP. The amount of increase is small and the information interaction is wasted. CoMP for cell edge users can significantly reduce inter-cell interference and improve cell edge users. Receive power. Therefore, most companies believe that CoMP should be used only for cell edge UEs.
  • Existing methods include selecting coordinated UEs according to the principle of SINR distribution, such as UE coordination only for SINR ⁇ 5 dB (decibel).
  • Multi-cell channel estimation can be optimized for low-speed users, low-speed user feedback overhead is small, and large delays can be tolerated.
  • the existing CoMP technology does not consider the specific operation method of the CoMP switching threshold. Therefore, the prior art mainly has the following problems:
  • the technical problem to be solved by the present invention is to provide a multi-point cooperative transmission and reception system measurement reporting method and system, and propose an optimized solution for the threshold of the central user switching to the CoMP mode and the event reporting triggering criterion.
  • the present invention provides a method for measuring a multi-point coordinated transmission and reception system, including:
  • the terminal reports the measurement report to the serving cell when the triggering criterion is reported by the measurement event according to the multi-point coordinated transmission and reception (CoMP) measurement configuration message delivered by the serving cell;
  • CoMP multi-point coordinated transmission and reception
  • the triggering criterion of the measurement event includes: the moving speed measurement value of the serving cell is lower than a preset first measurement threshold, and the RSRP measurement value of the serving cell and the RSRP measurement value of the measurement cell are The ratio is below a predetermined second measurement threshold.
  • the method further includes: sending, by the serving cell, the CoMP measurement configuration message to the terminal by using a radio resource control connection reconfiguration message.
  • the moving speed measurement value of the serving cell is: an accumulated value of a difference between measured values of two adjacent measurement moments of the serving cell in a period of time.
  • the method further includes: calculating a moving speed measurement value of the serving cell according to the following formula (3 ⁇ 4 S RP:
  • the moving speed measurement value of the serving cell is lower than a preset first measurement threshold, and is:
  • the method further includes: determining, by the terminal, the measured value of the serving cell according to the measured reference signal received power (RSRP) of the serving cell and the measured RSRP of the measured cell in the set of cells.
  • RSRP reference signal received power
  • the ratio of the measured value of the serving cell to the measured value of the measured cell is lower than a preset second measurement threshold, and is: SIR ⁇ 0 2 ;
  • the RSRP S is the RSRP measurement quantity of the serving cell
  • the RSRP k is the RSRP measurement quantity of the measurement cell in the measurement cell set
  • ⁇ 2 is the predefined second measurement threshold.
  • the method further includes: the RSRP of the serving cell measured by the terminal and the RSRP of the measurement cell in the measurement cell set are arranged in descending order according to the RSRP signal strength;
  • the terminal When reporting the measurement report to the serving cell, the terminal reports one or more cells with the strongest RSRP signal strength to the serving cell.
  • the method further includes:
  • Dynamically configuring the first measurement threshold and the second measurement according to a cell load and/or a CoMP mode The size of the threshold.
  • the present invention also provides a multipoint coordinated transmission and reception system measurement reporting system, the system includes a CoMP measurement configuration device in a serving cell, and a measurement upper device in the terminal, where: the CoMP measurement configuration device is set as: The terminal configures and delivers a CoMP measurement configuration message, where the CoMP measurement configuration message includes the following measurement event reporting triggering criteria: the moving cell measurement value of the serving cell is lower than a preset first measurement threshold, and the RSRP measurement value of the serving cell is The ratio of the measured RSRP measurements of the cell is lower than a preset second measurement threshold;
  • the measurement reporting device is configured to: report a measurement report to the serving cell when the triggering criterion is reported by the measurement event according to the CoMP measurement configuration message sent by the serving cell.
  • the CoMP measurement configuration device is configured to send the CoMP measurement configuration message to the terminal by using a RRC connection reconfiguration message.
  • the measurement reporting device is further configured to calculate a moving speed measurement value of the serving cell according to an accumulated value of a difference between measured values of two adjacent measurement moments of the serving cell in a period of time.
  • dt is the measurement interval
  • the measurement reporting device is further configured to calculate the measured value of the serving cell and the measured value of the measured cell according to the measured RSRP of the serving cell and the RSRP of the measured cell in the measured cell set according to the following formula: Ratio SIR:
  • RSRP S is the RSRP measurement quantity of the serving cell
  • RSRP k is the RSRP measurement quantity of the measurement cell in the measurement cell set.
  • the measurement reporting device is further configured to: perform the measured RSRP of the serving cell and the RSRP of the measurement cell in the measurement cell set in descending order according to the RSRP signal strength; report to the serving cell When the report is measured, one or more cells with the strongest RSRP signal strength are reported to the serving cell.
  • the CoMP measurement configuration apparatus is further configured to: dynamically configure the first measurement threshold and the second measurement threshold according to a cell load and/or a CoMP mode.
  • the present invention defines a new event reporting triggering criterion for the threshold of the central user switching to the CoMP mode and the event reporting triggering criterion, thereby avoiding frequent reporting measurements.
  • the present invention learns the UE's movement at the cell edge by using the moving speed measurement value, and ensures that the UE has sufficient residence time at the cell edge, and does not do for the user who quickly crosses the cell edge. CoMP processing, therefore, this part of the user does not have to report the measurement results, thereby reducing the signaling overhead.
  • FIG. 1 is a schematic diagram of a relationship between a serving cell, a neighboring cell, and a measurement cell set of the user;
  • FIG. 2 is a schematic flowchart of a CoMP system coordinated cell measurement reporting operation according to an embodiment of the present invention;
  • FIG. 3 shows a UE1 location of two coordinated cell situations;
  • Figure 4 shows the UE1 location for three cooperating cell scenarios.
  • the present invention provides a multi-point cooperative transmission and reception system measurement reporting method, and specifically adopts the following technical solutions:
  • the UE reports the measurement report to the serving cell when the triggering criterion is reported by the UE according to the CoMP measurement configuration message sent by the serving cell.
  • the measurement event reporting triggering criterion includes: the moving speed measurement value of the serving cell is lower than a preset first measurement threshold, and the ratio of the RSRP measurement value of the serving cell to the measurement cell is lower than the preset second measurement. Threshold.
  • the serving cell sends the CoMP measurement configuration message to the UE by using an RRC connection reconfiguration message.
  • the CoMP measurement configuration message is extended in the RRC connection reconfiguration message.
  • Measurement Configuration IE Measurement Configuration Information Element
  • the moving speed measurement value of the serving cell may be: an accumulated value of a difference between the measured values of the two adjacent measurement moments of the serving cell for a predetermined duration.
  • the moving speed measurement value of the serving cell is calculated according to the following formula (3 ⁇ 4 SRP :
  • the moving speed measurement value of the serving cell is lower than a preset first measurement threshold, and refers to: 3 ⁇ 4 8 ⁇ ⁇ ⁇ , which is the predefined first measurement threshold.
  • the ratio of the measured value of the serving cell to the measured value of the measured cell refers to: a ratio of an RSRP of the serving cell to a sum of RSRPs of all measured cells in the measured cell set.
  • the ratio of the measured value of the serving cell to the measured value of the measured cell is calculated by the following formula:
  • RSRP S is an RSRP measurement value of the serving cell
  • RSRP k is an RSRP measurement value in the measurement cell set.
  • the ratio of the measured value of the serving cell to the measured value of the measured cell is lower than a preset second measurement threshold, and is: SIR ⁇ 0 2 , where ⁇ 2 is the predefined second measurement threshold.
  • the method further includes:
  • the RSRP (RSRPs) of the measured serving cell and the RSRP of the measured cell in the measurement cell set are arranged in descending order according to the RSRP signal strength;
  • the UE When reporting the measurement report to the serving cell, the UE reports one or more cells with the strongest RSRP signal strength to the serving cell.
  • the threshold ⁇ 2 configured by the base station, and broadcast by the system broadcast message, the configuration of the thresholds ⁇ 2 , 0 may be statically configured, or according to a cell load, a cooperation mode such as JP (Joint Transmission Mode) or CB (collaboration) Other factors such as beamforming) are dynamically configured.
  • the COMP user measurement reporting operation process provided by the present invention mainly includes the following steps: Step 1: The serving cell of the UE broadcasts the measurement cell set of the local cell;
  • the measurement cell set may be carried by a system broadcast message, and notified to the UE periodically or in some predefined manner in the cell;
  • Step 2 The serving cell of the terminal sends an RRC Connection Reconfiguration message, and sends a CoMP measurement configuration message to the UE through an RRC Connection Reconfiguration message.
  • the third step the UE continuously detects the cell in the measurement cell set, and once the one or several cells in the measurement cell set meet the event triggering criterion, the UE reports the measurement report to the serving cell.
  • the cell center user switches to the CoMP mode to use the event-driven measurement reporting criterion, that is, when the triggering criterion for the measurement event is reported, the terminal reports the measurement event to the serving cell.
  • the triggering criteria for measuring the event report are as follows:
  • ⁇ 2 is a predefined threshold.
  • the fourth step the serving cell of the UE receives the measurement report reported by the UE, and determines the final participating coordinated cell according to the preset cooperative cell criterion;
  • the serving cell may preset the cooperative cell criterion according to different requirements of the actual application.
  • Step 5 The serving cell of the UE sends a cooperation message to the coordinated cell of the UE and the UE, and the service cell and the coordinated cell start a subsequent cooperation process.
  • the terminal UE1 is located in the cell 1, the cells 2 ⁇ 5 are the neighboring cells of the cell 1, and it is assumed that the cell 1 is the serving cell of the UE1, and the cells 2 ⁇ 4 are the measurement cell set of 11£1.
  • Community 5 Not a set of measurement cells for cell 1.
  • FIG. 2 is a schematic flowchart of a method for measuring and reporting according to an embodiment of the present invention. This embodiment uses an LTE system as an example. Referring to FIG. 2, the process is specifically described as follows:
  • Step 1 UE1 obtains a set of measurement cell adjacent to the serving cell (ie, cell 2 ⁇ 4) by reading a SIB (System Information Block) message;
  • SIB System Information Block
  • system messages are carried over SIB messages of the BCH (Broadcast Channel).
  • BCH Broadcast Channel
  • 4 Set the cell 1 to determine that the cell 2 ⁇ 4 is its measurement cell set, and the cell 1 newly defines the measurement cell set by extending the SIB message, that is, the SIB message of the LTE, and broadcasts it in the local cell.
  • Step 2 The RRC (Radio Resource Controlor) of the serving cell 1 configures the CoMP measurement of the UE1 by using a configuration message.
  • RRC Radio Resource Controlor
  • the CoMP measurement configuration of the UE1 to the cell 2 ⁇ 4 can be implemented by extending the Measurement Configuration IE in the RRC Connnection Reconfiguration, that is, the CoMP measurement configuration message is extended by the Measurement Configuration IE.
  • each measurement object and the report combination are identified by a Measurement ID, and each measurement includes a Measurement Object and a Measurement Configuration, where the Measurement Object defines the UE to be measured.
  • the target, Report Configuration defines the events and thresholds that trigger the measurement report, and also defines how the report is to be reported: periodic reporting, event reporting, and event reporting.
  • the existing events that trigger measurement reports mainly include the following:
  • A1 The measured value of the serving cell is higher than the predetermined measurement threshold.
  • A2 The measured value of the serving cell is lower than the preset measurement threshold.
  • A3 Adjacent EUTRA (Evolved-UMTS Terrestrial Radio Access) cell measurements are better than the target cell + predetermined offset.
  • A4 The adjacent EUTRA cell measurement value is higher than the predetermined measurement threshold.
  • A5 The measured value of the serving cell is lower than a preset measurement threshold and the measured value of the neighboring cell is higher than another predetermined measurement threshold.
  • Bl Inter RAT (inter-RAT) neighbor cell measurement is above a predetermined measurement threshold.
  • B2 The target cell is lower than a preset measurement threshold and the neighbor cell measurement value of the Inter RAT is higher than another predetermined measurement threshold.
  • the CoMP measurement configuration measurement event reporting triggering criterion and the event triggering the measurement report is a newly defined A6, that is:
  • A6 The ratio of the measured value of the serving cell to the measured value of the measured cell is lower than a preset measurement threshold, and the sum of the differences of the measured values of the two consecutive measurement moments of the serving cell in a period of time is lower than the preset The measured threshold is determined.
  • Step 3 UE1 measures RSRP of cells 1 to 4.
  • Step 4 UE1 reads an event trigger threshold value ⁇ 2 , ⁇ in the serving cell 1;
  • Step 5 The UE1 reports the measurement that meets the event reporting triggering criterion.
  • Step 6 The serving cell 1 determines the cooperation mode of the UE1 according to the measurement report reported by the UE1, that is, determines whether to perform CoMP cooperation on the UE1.
  • Step 7 The RRC of the serving cell 1 notifies the UE1 of the coordinated cell, the cooperative mode, and the like by means of a configuration message or the like.
  • the serving cell and the coordinated cell will perform a subsequent cooperation process.
  • the configuration of the threshold ⁇ 2 may adopt a method of dynamic configuration of the serving cell, for example, the size of the thresholds ⁇ 2 and ⁇ may be adjusted according to the cell load and the processing mode of the CoMP.
  • a typical configuration is shown in Table 1 below.
  • the user UE1 completes the cell set ⁇ Cell 2, Cell 3, Cell 4 ⁇ RSRP and (3 ⁇ 4 SRP measurement according to the measurement configuration, and uses the common pilot symbols of the respective cells of the cells 1 ⁇ 4. Measurement, set the measurement amount to meet RSRP RSRP RSRP RSRP4, and UE1 calculation
  • UE1 reports the measurement report.
  • UE1 can report the serving cell and the strongest cell in the signal strength ordering. At this time, the cell 2 can be used as a coordinated cell, and the location of the UE1 is as shown in FIG.
  • Application Example 2 Referring to FIG. 4, in this example, user UE1 completes cell RSRP and (3 ⁇ 4 S RP) measurement of cell set ⁇ cell 2, cell 3, cell 4 ⁇ according to the measurement configuration, if the signal strength is satisfied.
  • the UE 1 reports the measurement report.
  • UE1 may report both cell 2 and cell 3. At this time, cell 2 and cell 3 can be simultaneously used as a coordinated cell, and the location of UE1 is as shown in FIG. 4.
  • an embodiment of the present invention further provides a multi-point coordinated transmission and reception system measuring a system (not shown), the system mainly includes a CoMP measurement configuration device in a serving cell, and a measurement reporting device in the terminal, where :
  • the CoMP measurement configuration device is configured to: configure a CoMP measurement configuration message for the terminal, where the CoMP measurement configuration message includes the following measurement event reporting trigger criterion: the mobile cell speed measurement value of the serving cell is lower than a preset first Measuring a threshold, and a ratio of the RSRP measurement value of the serving cell to the RSRP measurement value of the measurement cell is lower than a preset second measurement threshold;
  • the measurement reporting device is configured to: report a measurement report to the serving cell when the triggering criterion is reported by the measurement event according to the CoMP measurement configuration message sent by the serving cell.
  • the CoMP measurement configuration device is configured to send the CoMP measurement configuration message to the terminal by using a radio resource control connection reconfiguration message.
  • the measurement reporting device is further configured to: calculate a moving speed measurement of the serving cell according to an accumulated value of a difference between measured values of two adjacent measurement moments of the serving cell in a period of time according to the following formula: Value (3 ⁇ 4 SRP :
  • dt is the measurement interval
  • the measurement reporting device is further configured to: according to the measured RSRP of the serving cell and the RSRP of the measurement cell in the measurement cell set, calculate the measured value of the serving cell and the measured value of the measured cell according to the following formula: Ratio SIR:
  • RSRP S is the RSRP measurement quantity of the serving cell
  • RSRP k is the RSRP measurement quantity of the measurement cell in the measurement cell set.
  • the measurement reporting device is further configured to: perform the measured RSRP of the serving cell and the RSRP of the measurement cell in the measurement cell set in descending order according to the RSRP signal strength; report to the serving cell One of the strongest RSRP signal strengths when measuring reports Or multiple cells are reported to the serving cell.
  • the CoMP measurement configuration apparatus is further configured to dynamically configure the first measurement threshold and the second measurement threshold according to a cell load and/or a CoMP mode.
  • the present invention defines a new event reporting triggering criterion for the threshold of the central user switching to the CoMP mode and the event reporting triggering criterion, thereby avoiding frequent The reported measurement set, and the frequent inbound and outbound operations; in addition, the present invention learns the UE's movement at the cell edge by using the moving speed measurement value, and ensures that the UE has sufficient residence time at the cell edge for the user who quickly crosses the cell edge. Therefore, the CoMP processing is not performed. Therefore, the user does not have to report the measurement result, thereby reducing the signaling overhead.

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Abstract

本发明公开了一种多点协作传输接收系统测量上报方法及系统，所述方法包括：终端根据服务小区下发的多点协作传输接收（CoMP）测量配置消息，在满足测量事件上报触发准则时，向所述服务小区上报测量报告；其中，所述测量事件上报触发准则包括：所述服务小区的移动速度测量值低于预先设定的第一测量门限，且所述服务小区的RSRP测量值与测量小区的RSRP测量值的比值低于预先设定的第二测量门限。

Description

一种多点协作传输接收系统测量上报方法及系统
技术领域
本发明涉及移动通信技术领域， 更具体地， 涉及一种多点协作传输接收 ( Coordinated Multipoint transmission/reception, 简称为 CoMP )系统测量上才艮 方法及系统。 背景技术
作为一种多载波传输模式 , 正交频分复用 ( Orthogonal Frequency Division Multiplex, 简称为 OFDM )技术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 ISI ( Inter-symbol Interference,符号 间干扰）的能力。 除此之外， 带宽利用率高、 实现简单等特点使 OFDM在无 线通信领域的应用越来越广， 比如基于正交频分复用多址的长期演进（ Long Term Evolution , 简称为 LTE ) 系统， 以及 LTE下一代的演进 LTE-Advanced 系统（第四代通信系统）等都^ ^于 OFDM技术的系统。
LTE-Advanced系统相对于 LTE 系统， 釆用了一些如 relay (中继） ， 频 谱聚合和 CoMP 等新技术来增强系统性能。 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 ( User Equipment, 用户设 备 )的吞吐量，如多个 eNB(演进型基站）协作消除 ICI( Inter-Cell Interference, 小区间干扰） ， 甚至将干扰信号变成期望信号。 随着研究的深入， 发现在 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。 因此绝大多数公司非常看好 CoMP技术。
CoMP技术从传输方向上， 可分为上行 CoMP技术和下行 CoMP技术。 其中， 将下行 CoMP ( DL CoMP )分为两大类： 联合传输模式（ Joint Process , 简称为 JP ) 和 CS ( Coordinated scheduling, 协同调度） /CB ( Coordinated Beamforming, 协同波束！!武形 )模式。
a ) CS/CB模式： 瞬时只有多点中的一个节点给 UE发送数据， 类似于增 强型 ICIC ( Inter-Cell Interference Coordination, 小区间干扰协调）， 协作点不 共享数据，但共享信道相关信息，比如半静态 ICIC,协同 PMK Precoding Matrix Indicator, 预编码矩阵指示） 、 协同 beamforming等。
其中， 在协同调度 /beamformng模式下， 发送给 UE的数据是通过 UE所 在的服务小区的 eNB传输的； 但是调度决策是联合控制的， 如控制协同小区 中干扰的产生等。
b ) JP联合传输模式： 多点同时给一个 UE发送数据， 以提高接收信号质 量和 /或消除对其他 UE的干扰。
参与 CoMP协作的基站和终端主要包括：
服务小区： 向终端发送控制信道的小区。 在终端与基站的通讯过程中， 一般只有一个服务小区。
测量小区集合： 终端进行周期性的信道状况信息测量的小区集合。 该集 合由终端服务小区半静态配置。
协作小区集合： 协作小区集合是直接或间接参与向终端发送业务数据的 小区集。
目前， 对于 CoMP技术， 已达成的共识主要包括以下内容：
一、 参与小区数量不宜过多
在多个 eNBs之间的协作， 可以很大程度提高小区边缘和平均小区吞吐 率。 但是在多个 eNBs之间共享 data (数据 ) /CSI ( Channel State Information, 信道状态信息） 需要很高的 backhaul (回程链路）容量， 因而实施起来十分 复杂。为了降低复杂度，应当考虑有限个数量的 eNBs协作来为特定 UE服务。 因此一个与 CoMP相关的议题时如何选择协作小区群组（cluster ) , 以达到 在可接受的调度复杂度和 backhaul容量上最大化小区吞吐量。
二、 只对小区边缘 UE釆用 CoMP
CoMP理论上可以用于小区边缘 UE和小区中心 UE,但非 CoMP时小区 中心 UE的 SINR ( Signal to Interference plus Noise Ratio, 信号与干扰力。噪声 比）本身就很高， 釆用 CoMP后对吞吐量提高很小， 并且浪费信息交互。 而 CoMP用于小区边缘用户则可以明显降低小区间干扰和提高小区边缘用户的 接收功率。 因此多数公司都认为应该只对小区边缘 UE釆用 CoMP。 已有的方 法包括根据 SINR分布的原则选取协同的 UE, 如只对 SINR<5dB (分贝） 的 UE协同。
三、 适合用于低速 UE
多小区的信道估计可以根据低速用户进行优化， 低速用户反馈开销小， 且可以容忍大的延迟。
目前，现有的 CoMP技术中并没有考虑 CoMP切换门限的具体操作方法， 因而， 现有技术主要存在以下问题：
1)由于 CoMP用户多位于小区边缘， 根据分析， 处于切换位置的用户约 占 5%, 而处于 Comp的用户约占 30%, 如果所有用户频繁的上报测量集， 造 成信令开销太大；
2)如果釆用简单的 RSRP ( Reference Signal Received Power, 参考信号接 收功率）门限切换算法，如： Abs(RSRPceU-RSRPsource)dB< RSRPthresholdin, Abs(RSRPcell-RSRPsource) dB>RSRPthresholdout , 则由于门限定义受限， 容 易引发频繁的入集、 出集操作。 发明内容
本发明解决的技术问题是提供一种多点协作传输接收系统测量上报方法 及系统， 针对中心用户切换到 CoMP模式的门限及事件上报触发准则， 提出 了优化的解决方案。
为解决上述技术问题， 本发明提供了一种多点协作传输接收系统测量上 "^艮方法， 包括：
终端根据服务小区下发的多点协作传输接收 ( CoMP )测量配置消息， 在 满足测量事件上报触发准则时， 向所述服务小区上报测量报告；
其中， 所述测量事件上 ^艮触发准则包括： 所述服务小区的移动速度测量 值低于预先设定的第一测量门限， 且所述服务小区的 RSRP测量值与测量小 区的 RSRP测量值的比值低于预先设定的第二测量门限。 可选地， 所述方法还包括： 所述服务小区通过无线资源控制连接重配置 消息向所述终端下发所述 CoMP测量配置消息。
可选地， 所述服务小区的移动速度测量值为： 所述服务小区在一段时间 内相邻两个测量时刻的测量值的差值的累加值。
可选地， 所述方法还包括： 按照以下公式计算所述服务小区的移动速度 测量值（¾SRP:
N
S Z (RSRP(n + dt) - RSRP(n))；
n=l
所述服务小区的移动速度测量值低于预先设定的第一测量门限， 是指：
^ SRP^l i
其中， n=l,2, ... ,N为测量时刻， dt为测量间隔； 为所述预先定义的第 一测量门限。
可选地， 所述方法还包括： 所述终端根据测量的所述服务小区的参考信 号接收功率（RSRP )及测量小区集合中的测量小区的 RSRP, 按照以下公式 计算所述服务小区的测量值与测量小区的测量值的比值 SIR:
SIR =
∑RSRPk
k=l
所述服务小区的测量值与测量小区测量值的比值低于预先设定的第二测 量门限， 是指： SIR<02;
其中， RSRPS为服务小区的 RSRP测量量， RSRPk为测量小区集合中测 量小区的 RSRP测量量； θ2为所述预先定义的第二测量门限。
可选地， 所述方法还包括： 所述终端将测量的所述服务小区的 RSRP及 测量小区集合中的测量小区的 RSRP, 按照 RSRP信号强度的大小进行降序 排列；
所述终端在向所述服务小区上报测量报告时， 将 RSRP信号强度最强的 一个或多个小区上报给所述服务小区。
可选地， 所述方法还包括：
根据小区负载和 /或 CoMP模式动态配置所述第一测量门限及所述第二测 量门限的大小。
本发明还提供了一种多点协作传输接收系统测量上报系统， 所述系统包 括服务小区中的 CoMP测量配置装置， 及终端中的测量上 装置， 其中： 所述 CoMP测量配置装置设置为： 为终端配置并下发 CoMP测量配置消 息， 所述 CoMP测量配置消息包含以下测量事件上报触发准则： 服务小区的 移动速度测量值低于预先设定的第一测量门限， 且服务小区的 RSRP测量值 与测量小区的 RSRP测量值的比值低于预先设定的第二测量门限；
所述测量上报装置设置为： 根据服务小区下发的 CoMP测量配置消息， 在满足所述测量事件上报触发准则时， 向所述服务小区上报测量报告。
可选地， 所述 CoMP测量配置装置是设置为通过无线资源控制连接重配 置消息向所述终端下发所述 CoMP测量配置消息。
可选地， 所述测量上报装置还设置为根据所述服务小区在一段时间内相 邻两个测量时刻的测量值的差值的累加值， 按照以下公式计算所述服务小区 的移动速度测量值 (¾SRP:
N
S (RSRP(n + dt) - RSRP(n))；
n=l
其中， n=l,2, ... ,N为测量时刻， dt为测量间隔。
可选地， 所述测量上报装置还设置为根据测量的所述服务小区的 RSRP 及测量小区集合中的测量小区的 RSRP, 按照以下公式计算所述服务小区的 测量值与测量小区的测量值的比值 SIR:
SIR =
∑RSRPk
k=l
其中， RSRPS为服务小区的 RSRP测量量， RSRPk为测量小区集合中测 量小区的 RSRP测量量。
可选地， 所述测量上报装置还设置为： 将测量的所述服务小区的 RSRP 及测量小区集合中的测量小区的 RSRP, 按照 RSRP信号强度的大小进行降 序排列； 在向所述服务小区上报测量报告时， 将 RSRP信号强度最强的一个 或多个小区上报给所述服务小区。 可选地， 所述 CoMP测量配置装置还设置为： 根据小区负载和 /或 CoMP 模式动态配置所述第一测量门限及所述第二测量门限的大小。
与现有技术相比， 本发明至少具有如下有益效果： 本发明针对中心用户 切换到 CoMP模式的门限及事件上报触发准则， 定义了一种新的事件上报触 发准则， 从而避免了频繁的上报测量集， 以及频繁的入集、 出集操作； 此外， 本发明通过移动速度测量值获知 UE在小区边缘的移动情况，确保 UE在小区 边缘有足够滞留时间， 对于快速穿越小区边缘的用户则不做 CoMP处理， 因 此， 这部分用户不必上报测量结果， 从而减少信令开销。 附图概述
图 1为用户的服务小区、 邻小区以及测量小区集合的关系示意图； 图 2为本发明实施例的 CoMP系统协作小区测量上报操作流程示意图； 图 3示出了两个协作小区情形的 UE1位置；
图 4示出了三个协作小区情形的 UE1位置。 本发明的较佳实施方式
为解决现有技术中存在的问题， 本发明提供了一种多点协作传输接收系 统测量上报方法， 具体釆用如下技术方案：
UE根据服务小区下发的 CoMP测量配置消息，在满足测量事件上报触发 准则时， 向所述服务小区上报测量报告；
其中， 所述测量事件上报触发准则包括： 服务小区的移动速度测量值低 于预先设定的第一测量门限， 且服务小区与测量小区的 RSRP测量值的比值 低于预先设定的第二测量门限。
可选地， 所述服务小区通过 RRC连接重配置消息向 UE下发所述 CoMP 测量配置消息。
可选地，所述 CoMP测量配置消息通过扩展所述 RRC连接重配置消息中 的 Measurement Configuration IE (测量配置信息元 ) 实现。
可选地， 所述服务小区的移动速度测量值可以是： 所述服务小区在一预 定的持续时间内相邻两个测量时刻的测量值的差值的累加值。
可选地， 按照以下公式计算所述服务小区的移动速度测量值 (¾SRP:
N
S ^ (RSRP(n + dt) - RSRP(n)) ,
n=l
其中， n=l,2, ... ,N为测量时刻， dt为测量间隔;
所述服务小区的移动速度测量值低于预先设定的第一测量门限， 是指： ¾8ΚΡ<θι , 为所述预先定义的第一测量门限。
可选地， 所述服务小区的测量值与测量小区的测量值的比值是指： 所述 服务小区的 RSRP与测量小区集合中所有测量小区的 RSRP之和的比值。
可选地， 通过以下公式计算所述服务小区的测量值与测量小区的测量值 的比值 SIR:
∑RSRPk
k=l
其中， RSRPS为服务小区的 RSRP测量值， RSRPk为测量小区集合中的 RSRP测量值；
所述服务小区的测量值与测量小区的测量值的比值低于预先设定的第二 测量门限， 是指： SIR<02, 其中， θ2为所述预先定义的第二测量门限。
可选地， 所述方法还包括：
对测量的服务小区的 RSRP ( RSRPs )及测量小区集合中的测量小区的 RSRP按照 RSRP信号强度的大小进行降序排列；
UE在向所述服务小区上报测量报告时，将 RSRP信号强度最强的一个或 多个小区上报给所述服务小区。
可选地， 所述门限 θ2、 由基站配置， 并由系统广播消息广播， 门限 θ2、 0 的配置可以静态配置， 或根据小区负载、 协作模式如 JP (联合传输模式） 或 CB (协同波束赋形）等其他因素动态配置。 具体地，本发明提供的 COMP用户测量上报操作过程主要包括如下步骤： 第一步： UE的服务小区广播本小区的测量小区集合；
其中， 测量小区集合可以通过系统广播消息携带， 在小区中周期性地或 以某种预先定义的方式通知 UE;
第二步： 终端的服务小区发送 RRC Connection Reconfiguration ( RRC连 接重配置）消息，将 CoMP测量配置消息通过 RRC Connection Reconfiguration 消息发送给 UE;
第三步： UE持续检测测量小区集合中的小区， 一旦测量小区集合中的一 个或几个小区满足事件触发准则， 则 UE向服务小区上报测量报告；
其中， 小区中心用户切换到 CoMP模式釆用事件驱动的测量上报准则， 即满足测量事件上报的触发准则时， 终端向服务小区上报测量事件， 具体地， 测量事件上报的触发准则如下所示：
1) SIR<02,其中 SIR = N_RSRPs , RSRPs是服务小区的 RSRP测量值， RSRPk
∑RSRPk
k=l
是测量小区集合中的 RSRP测量值， θ2是预先定义的门限。
2) ¾SRPjS<ei , θι是预先设定的门限。
第四步： UE 的服务小区接收到 UE 上报的测量报告 （Measurement Report ) , 根据预先设定的协作小区准则， 确定最终参与协作小区；
其中， 服务小区可根据实际应用的不同需求， 预先设定协作小区准则。 第五步： UE的服务小区向 UE及 UE的协作小区发送协作消息， 服务小 区、 协作小区开始后续协作过程。
为了便于阐述本发明， 以下将结合附图及具体实施例对本发明技术方案 的实施作进一步详细描述。
如图 1所示， 终端 UE1位于小区 1中， 小区 2~5是小区 1的邻小区， 假 设小区 1为 UE1的服务小区， 而小区 2~4是11£1的测量小区集合。 小区 5 不是小区 1的测量小区集合。
图 2所示为依据本发明实施例的测量上报方法的流程示意图， 本实施例 以 LTE系统为例， 参见图 2 , 该流程具体描述如下：
步骤 1 , UE1通过读取 SIB ( System Information Block, 系统信息块） 消 息， 获得服务小区相邻的测量小区集合（即小区 2~4 ) 消息；
在 LTE中， 系统消息通过 BCH (广播信道 )的 SIB消息携带。 4叚设小区 1确定小区 2~4是其测量小区集合，小区 1通过扩展 SIB消息，即 LTE的 SIB 消息中， 新定义测量小区集合， 并在本小区广播。
步骤 2 ,服务小区 1的 RRC ( Radio Resource Controlor,无线资源控制器） 通过配置消息配置 UE1的 CoMP测量；
其中， UE1对小区 2~4的 CoMP测量配置可以通过扩展 RRC Connnection Reconfiguration中的 Measurement Configuration IE实现，即 CoMP的测量配置 消息由 Measurement Configuration IE扩展而成。
具体地 , 在 Measurement Configuration中 , 以 Measurement ID来标识每 个测量对象和上报组合， 每个测量包含 Measurement Object (测量对象）和 Report Configuration (测量配置 )两个部分， 其中 Measurement Object定义了 UE需要测量的目标， Report Configuration则定义了触发测量报告的事件及门 限、 还定义了报告的方式： 分周期上报、 事件上报及事件周期上报。
已有的触发测量报告的事件主要有以下几种：
A1 : 服务小区的测量值高于预定的测量门限。
A2: 服务小区的测量值低于预先设定的测量门限。
A3 : 相邻的 EUTRA ( Evolved-UMTS Terrestrial Radio Access, 进化的 UMTS 陆地无线接入） 小区的测量值优于目标小区 +预定的偏移量。
A4： 相邻的 EUTRA小区测量值高于预定的测量门限。
A5: 服务小区的测量值低于预先设定的测量门限并且相邻小区的测量值 高于另一预定的测量门限。
Bl : Inter RAT ( RAT间） 的邻小区测量值高于预定的测量门限。 B2: 目标小区低于预先设定的测量门限并且 Inter RAT的邻小区测量值 高于另一预定的测量门限。
本实施例中， CoMP测量配置测量事件上报触发准则， 触发测量报告的 事件为新定义的 A6 , 即：
A6: 服务小区的测量值与测量小区的测量值之和的比值低于预先设定的 测量门限， 并且服务小区在一段时间内连续两个测量时刻的测量值的差值之 和低于预先设定的测量门限。
步骤 3 , UE1测量小区 1 ~ 4的 RSRP;
步骤 4 , UE1读取服务小区 1中的事件触发门限值 θ2、 θι ;
步骤 5 , UE1对满足事件上报触发准则的测量进行上报；
步骤 6 , 服务小区 1根据 UE1上报的测量报告确定 UE1的协作模式， 即 确定是否要对 UE1进行 CoMP协作，
步骤 7 ,服务小区 1的 RRC通过配置消息等方式通知 UE1协作小区、协 作模式等。
此后， 服务小区、 协作小区将进行后续的协作过程。
此外， 在本发明实施例中， 门限 θ2、 的配置可以釆用服务小区动态配 置的方法， 如可以根据小区负载及 CoMP的处理模式进行调整门限 θ2、 θι的 大小。 一种典型的配置如下表 1所示。
表 1
Figure imgf000012_0001
请参见表 1 , 假如邻小区负载较重， 由于 JP模式需要消耗较多的资源， 此时， 可以釆用较小的门限 = ， θ = θ 使得满足门限的用户数减少； 反 之， 当邻小区负载较轻时， 则可以釆用较大的门限 = ， ΘΧ = 使得满足 门限的用户数增加。
以下将结合附图及具体应用示例对本发明的测量上报方法作更进一步详 细的介绍。
应用示例一
请参见图 3 ,本示例中，用户 UE1根据测量配置， 完成小区集合 {小区 2, 小区 3 , 小区 4}RSRP和 (¾SRP的测量， 釆用小区 1~4的各自小区公有导频符 号进行测量， 设测量量满足 RSRP RSRP RSRP RSRP4, 同时 UE1 计算
SIR = 4 RSRPl 和 ^SRP, , 并与门限 θ2、 进行比较， 一旦满足上报条件， 则 ∑RSRPk
k=2
UE1上报测量报告。
UE1在上报的测量报告中， 可以报告服务小区以及信号强度排序中最强 的小区。 此时， 则可以将小区 2作为协作小区， UE1的位置如图 3所示。
应用示例二 请参见图 4,本示例中，用户 UE1根据测量配置， 完成小区集合 {小区 2, 小区 3 , 小区 4}的小区 RSRP 和 （¾SRP的测量， 如果信号强度满足
RSRPi>RSRP2>RSRP3>RSRP4 , 同时， UE1 计算 SIR = 4 RSR?1 和 (¾SRP,i , 并
∑RSRPk ' k=2
与门限 θ2、 进行比较， 一旦满足上报条件， 则 UE1上报测量报告。
可选地， 如果信号强度最强的两个测量小区的信号强度的差值 RSRP2-RSRP3小于某个值， 则 UE1可以同时报告小区 2和小区 3。 此时， 可 以将小区 2和小区 3同时作为协作小区， UE1的位置如图 4所示。
从以上描述可以看出，门限0 实际上反映了 UE1在小区边缘的移动情况， 小于门限0确保 UE1在小区边缘有足够滞留时间，而对于快速穿越小区边缘 的用户， 则不做 CoMP处理， 因此， 这部分用户也不必上报测量结果， 从而 减少信令开销。 此外， 本发明实施例还提供了一种多点协作传输接收系统测量上 "^系统 (未图示） ， 该系统主要包括服务小区中的 CoMP测量配置装置， 及终端中 的测量上报装置， 其中：
所述 CoMP测量配置装置， 设置为： 为终端配置并下发 CoMP测量配置 消息， 所述 CoMP测量配置消息包含以下测量事件上报触发准则： 服务小区 的移动速度测量值低于预先设定的第一测量门限， 且服务小区的 RSRP测量 值与测量小区的 RSRP测量值的比值低于预先设定的第二测量门限；
所述测量上报装置，设置为： 根据服务小区下发的 CoMP测量配置消息， 在满足所述测量事件上报触发准则时， 向所述服务小区上报测量报告。
可选地， 所述 CoMP测量配置装置设置为通过无线资源控制连接重配置 消息向所述终端下发所述 CoMP测量配置消息。
可选地， 所述测量上报装置还设置为： 根据所述服务小区在一段时间内 相邻两个测量时刻的测量值的差值的累加值， 按照以下公式计算所述服务小 区的移动速度测量值 (¾SRP:
N
S ^ (RSRP(n + dt) - RSRP(n))；
n=l
其中， n=l,2, ... ,N为测量时刻， dt为测量间隔。
可选地，所述测量上报装置还设置为：根据测量的所述服务小区的 RSRP 及测量小区集合中的测量小区的 RSRP, 按照以下公式计算所述服务小区的 测量值与测量小区的测量值的比值 SIR:
∑RSRPk
k=l
其中， RSRPS为服务小区的 RSRP测量量， RSRPk为测量小区集合中测 量小区的 RSRP测量量。
可选地， 所述测量上报装置还设置为： 将测量的所述服务小区的 RSRP 及测量小区集合中的测量小区的 RSRP, 按照 RSRP信号强度的大小进行降 序排列； 在向所述服务小区上报测量报告时， 将 RSRP信号强度最强的一个 或多个小区上报给所述服务小区。
可选地， 所述 CoMP测量配置装置还用于， 根据小区负载和 /或 CoMP模 式动态配置所述第一测量门限及所述第二测量门限的大小。
以上仅为本发明的优选实施案例而已， 并不用于限制本发明， 本发明还 可有其他多种实施例， 在不背离本发明精神及其实质的情况下， 熟悉本领域 的技术人员可根据本发明做出各种相应的改变和变形， 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。
显然， 本领域的技术人员应该明白， 上述的本发明的各功能模块或各步 骤可以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者 分布在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行 的程序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 并且在某些情况下， 可以以不同于此处的顺序执行所示出或描述的步骤， 或 者将它们分别制作成各个集成电路功能模块， 或者将它们中的多个功能模块 或步骤制作成单个集成电路功能模块来实现。 这样， 本发明不限制于任何特 定的硬件和软件结合。
工业实用性 与现有技术相比， 本发明至少具有如下有益效果： 本发明针对中心用户 切换到 CoMP模式的门限及事件上报触发准则， 定义了一种新的事件上报触 发准则， 从而避免了频繁的上报测量集， 以及频繁的入集、 出集操作； 此外， 本发明通过移动速度测量值获知 UE在小区边缘的移动情况，确保 UE在小区 边缘有足够滞留时间， 对于快速穿越小区边缘的用户则不做 CoMP处理， 因 此， 这部分用户不必上报测量结果， 从而减少信令开销。

Claims

权 利 要 求 书
1、 一种多点协作传输接收系统测量上报方法， 包括：
终端根据服务小区下发的多点协作传输接收 ( CoMP )测量配置消息， 在 满足测量事件上报触发准则时， 向所述服务小区上报测量报告；
其中， 所述测量事件上 ^艮触发准则包括： 所述服务小区的移动速度测量 值低于预先设定的第一测量门限， 且所述服务小区的参考信号接收功率 ( RSRP )测量值与测量小区的 RSRP测量值的比值低于预先设定的第二测量 门限。
2 如权利要求 1所述的方法， 所述方法还包括：
所述服务小区通过无线资源控制连接重配置消息向所述终端下发所述
CoMP测量配置消息。
3、 如权利要求 1所述的方法， 其中，
所述服务小区的移动速度测量值为： 所述服务小区在一段时间内相邻两 个测量时刻的测量值的差值的累加值。
4、 如权利要求 3所述的方法， 所述方法还包括：
按照以下公式计算所述服务小区的移动速度测量值 (¾SRP:
N
S ^ (RSRP(n + dt) - RSRP(n))；
n=l
所述服务小区的移动速度测量值低于预先设定的第一测量门限， 是指：
^ SRP^i ;
其中， n=l,2, ... ,N为测量时刻， RSRP ( n )是 n时刻的 RSRP值， dt为测 量间隔； 为所述预先定义的第一测量门限。
5、 如权利要求 1所述的方法， 所述方法还包括：
所述终端根据测量的所述服务小区的参考信号接收功率（RSRP )及测量 小区集合中的测量小区的 RSRP, 按照以下公式计算所述服务小区的测量值 与测量小区的测量值的比值 SIR: N
∑RSRPk 所述服务小区的测量值与测量小区测量值的比值低于预先设定的第二测 量门限， 是指： SIR<02;
其中， RSRPS为服务小区的 RSRP测量值， RSRPk为测量小区集合中测 量小区的 RSRP测量值； θ2为所述预先定义的第二测量门限。
6、 如权利要求 1至 5之任一项所述的方法， 所述方法还包括： 所述终端 将测量的所述服务小区的 RSRP及测量小区集合中的测量小区的 RSRP, 按 照 RSRP信号强度的大小进行降序排列；
所述终端在向所述服务小区上报测量报告时， 将 RSRP信号强度最强的 一个或多个小区上才艮给所述月良务小区。
7、 如权利要求 1至 5之任一项所述的方法， 所述方法还包括： 根据小区负载和 /或 CoMP模式动态配置所述第一测量门限及所述第二测 量门限的大小。
8、一种多点协作传输接收系统测量上 系统， 所述系统包括月良务小区中 的多点协作传输接收（CoMP )测量配置装置， 及终端中的测量上 装置， 其 中：
所述 CoMP测量配置装置设置为： 为终端配置并下发 CoMP测量配置消 息， 所述 CoMP测量配置消息包含以下测量事件上报触发准则： 服务小区的 移动速度测量值低于预先设定的第一测量门限， 且服务小区的参考信号接收 功率（RSRP )测量值与测量小区的 RSRP测量值的比值低于预先设定的第二 测量门限；
所述测量上报装置设置为： 根据服务小区下发的 CoMP测量配置消息， 在满足所述测量事件上报触发准则时， 向所述服务小区上报测量报告。
9、 如权利要求 8所述的系统， 其中，
所述 CoMP测量配置装置是设置为通过无线资源控制连接重配置消息向 所述终端下发所述 CoMP测量配置消息。
10、 如权利要求 8所述的系统， 其中，
所述测量上报装置还设置为根据所述服务小区在一段时间内相邻两个测 量时刻的测量值的差值的累加值， 按照以下公式计算所述服务小区的移动速 度测量值 (¾SRP:
N
S ^ (RSRP(n + dt) - RSRP(n))；
n=l
其中， n=l,2, ... ,N为测量时刻， RSRP ( n )是 n时刻的 RSRP值， dt为测 量间隔。
11、 如权利要求 8所述的系统， 其中，
所述测量上报装置还设置为根据测量的所述服务小区的参考信号接收功 率（RSRP )及测量小区集合中的测量小区的 RSRP, 按照以下公式计算所述 服务小区的测量值与测量小区的测量值的比值 SIR:
∑RSRPk
k=l
其中， RSRPS为服务小区的 RSRP测量值， RSRPk为测量小区集合中测 量小区的 RSRP测量值。
12、 如权利要求 8至 11之任一项所述的系统， 其中，
所述测量上报装置还设置为： 将测量的所述服务小区的 RSRP及测量小 区集合中的测量小区的 RSRP, 按照 RSRP信号强度的大小进行降序排列； 在向所述服务小区上报测量报告时， 将 RSRP信号强度最强的一个或多个小 区上报给所述服务小区。
13、 如权利要求 8至 11之任一项所述的系统， 其中，
所述 CoMP测量配置装置还设置为：根据小区负载和 /或 CoMP模式动态 配置所述第一测量门限及所述第二测量门限的大小。
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JP5593444B2 (ja) 2014-09-24
US20130201914A1 (en) 2013-08-08
EP2574095A1 (en) 2013-03-27
US9001734B2 (en) 2015-04-07
EP2574095B1 (en) 2017-09-06
CN102457349B (zh) 2015-01-28
JP2013534763A (ja) 2013-09-05
CN102457349A (zh) 2012-05-16

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