WO2012152148A1 - 基站协作方法及系统 - Google Patents

基站协作方法及系统 Download PDF

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Publication number
WO2012152148A1
WO2012152148A1 PCT/CN2012/073187 CN2012073187W WO2012152148A1 WO 2012152148 A1 WO2012152148 A1 WO 2012152148A1 CN 2012073187 W CN2012073187 W CN 2012073187W WO 2012152148 A1 WO2012152148 A1 WO 2012152148A1
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Prior art keywords
base station
cooperation
resource
priority
ues
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English (en)
French (fr)
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陈诗军
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ZTE Corp
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ZTE Corp
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

Definitions

  • the present invention relates to the field of communications, and in particular to a base station cooperation method and system.
  • Background Art As a standard for the fourth generation communication system (4G), IMT-Advanced (Intelligent Multimode)
  • Terminal-Advanced an improved intelligent multi-mode terminal puts higher demands on the performance of the system, especially the frequency efficiency of the uplink and downlink.
  • Coordinated multi-point transmission/reception is a technology that can expand the coverage of rate transmission, improve the quality and throughput of cell edge services, and system throughput. It is an important technology to improve the spectrum utilization of the system. , got a lot of attention.
  • the so-called coordinated multi-point transmission that is, multiple base stations cooperatively transmit and serve one or more UEs (User Equipment).
  • the 3MP defined by the 3GPP includes two scenarios, one is multi-point cooperative scheduling, that is, through the interaction scheduling information between adjacent nodes, the interference coordination between the transmission signals of each cell is achieved; the other is multi-point joint processing, that is, A plurality of cooperative nodes jointly provide services to target users by sharing data, CSI (Channel Situation Information), scheduling information, and the like.
  • CSI Channel Situation Information
  • the current coordinated multi-point transmission architecture diagram is shown in Figure 1.
  • the serving base station (Serving eNode-B) and the cooperative base station (Collaborative eNode-B) are connected through an optical interface (X2 Interface), and the two base stations are simultaneously UE0 and UE1. Provide resources, the current X2 interface is not defined.
  • the distance between the user at the edge of the cell and the neighboring cell is comparable to the distance of the serving cell, and is subject to the characteristics of Network MIMO (Multi-Input Multi-Output).
  • the edge user is the main interference object (the downlink is interfered by the neighboring cell, and the uplink interferes with the neighboring cell).
  • FFR Fractional Frequency Reuse
  • power control are mainly used.
  • FFR is mainly a strategy for interference avoidance. In this way, if it cooperates, it will bring greater performance to edge users. Improve, while improving the overall performance of the system.
  • JP Joint Processing
  • JT Joint transmission
  • DCS Dynamic Channel Selection
  • COMP Coordinated Scheduling/Beamforming
  • DL COMP downlink COMP
  • the method of setting the cell priority is basically adopted, and the cell is divided by the priority.
  • the cell with the highest priority is selected first.
  • the defect of this method is that the COMP cooperation is reduced. opportunity.
  • the interference received by UEs in different base stations is not necessarily equal.
  • cooperation needs to be eliminated to eliminate the interference received by the UE.
  • the priority processing method used in the related technologies reduces the chance of COMP cooperation, which may be needed. This can not be achieved in the case of collaboration to eliminate interference. For example, referring to FIG.
  • UE a can receive the wireless signal b sent by B2 in addition to the signal a of the base station B1, and the wireless signal b can interfere with the signal a sent by B1.
  • UE b does not necessarily receive the interference signal a of NB1. Therefore, the UEs under the two base stations receive different interference conditions, and the requirements for whether or not cooperation is required to eliminate interference are also different.
  • FIG. 2 it is only necessary to eliminate the interference received by the UE a. In actual operation, the interference cancellation operation must be performed on both UEs, which causes waste of resources. In view of the problem of reducing the opportunities for COMP collaboration and the waste of resources in related technologies, no effective solution has been proposed yet.
  • a main object of the embodiments of the present invention is to provide a base station cooperation method and system, so as to at least solve the problem of reducing the opportunity of COMP cooperation and causing waste of resources in the related art.
  • a base station cooperation method including: a base station initiating cooperation determines a resource to be allocated to a user equipment (UE); and a coordinated multipoint transmission (COMP) set in addition to the initiated collaboration
  • the other base stations outside the base station cooperate to select UEs applicable to the resources in the respective managed UEs, wherein the COMP set includes all base stations capable of performing allocation processing on the resources.
  • the method further includes: each UE determining its own measurement COMP set, where the measurement COMP set includes at least one sector, and the UE can A downlink common pilot signal of the at least one sector is detected, and a downlink common pilot signal strength of the at least one sector exceeds a preset threshold.
  • other base stations other than the base station that initiates cooperation in the COMP set cooperatively select UEs suitable for the resource in the respective managed UEs, including: the other base stations determining whether the resources have been pre-allocated to One or more specified UEs; the other base station selects a UE applicable to the resource according to the judgment result.
  • the selecting, by the other base station, the UE that is applicable to the resource according to the determination result includes: if the resource is not pre-assigned to the designated UE, the other base station selects the UE from the UE that does not participate in the pre-allocation The other base stations are paired and the resources are allocated to the successfully paired UE.
  • the selecting, by the other base station, the UE that is applicable to the resource according to the determination result includes: if the resource has been pre-allocated to the designated UE, the other base station is paired with the designated UE.
  • the other base station is paired with the designated UE, including: if the pairing is successful, the other base station directly calculates a precoding matrix of the resource according to the channel information fed back by the successfully paired UE; if the pairing is unsuccessful, The other base station calculates the precoding matrix according to the channel information fed back by the unsuccessful UE and the priority of the base station that initiates the cooperation.
  • the calculating, by the other base station, the precoding matrix of the resource according to the priority of the base station that initiates the cooperation includes: when the priority of the base station that initiates cooperation is higher than the priority of the other base station, The other base station calculates the precoding matrix by using channel information that does not include the feedback of the specified UE.
  • a base station cooperation system including: a base station that initiates cooperation and another base station in a coordinated multipoint transmission (COMP) set other than the base station that initiates cooperation: the base station that initiates cooperation And being configured to determine a resource to be allocated to the user equipment (UE); the other base station is configured to cooperatively select, in the respective managed UE, a UE that is set to be the resource, where the COMP set includes all capable of The base station on which the resource performs allocation processing.
  • COMP coordinated multipoint transmission
  • the base station that initiates the cooperation and the other base station are further configured to set a measurement COMP of the UE that is managed by itself, where the measurement COMP set includes at least one sector, and the UE can detect the at least one fan. a downlink common pilot signal of the area, and the downlink common pilot signal strength of the at least one sector exceeds a preset threshold.
  • the other base station is further configured to determine whether the resource has been pre-allocated to the designated one or more UEs; and select, according to the determination result, a UE that is suitable to be the resource.
  • the other base station is further configured to: if the resource is not pre-assigned to the designated UE, select a UE to be paired with the other base station from the UE that does not participate in the pre-allocation, and allocate the resource to the successfully paired UE. .
  • the other base station is further configured to pair with the designated UE if the resource has been pre-allocated to the designated UE.
  • the other base station is further configured to: if the pairing is successful, directly calculate the precoding matrix of the resource according to the channel information fed back by the successfully paired UE; if the pairing is unsuccessful, according to the channel information and the feedback of the unsuccessful UE.
  • the precoding matrix is calculated by the priority of the base station initiating the cooperation.
  • the other base station is further configured to: when the priority of the base station that initiates cooperation is higher than the priority of the other base station, calculate the precoding matrix by using channel information that does not include the feedback of the specified UE; When the priority of the base station that initiates the cooperation is lower than the priority of the other base station, the designated UE is forcibly paired, and the precoding matrix is calculated by using the channel information fed back by the specified UE.
  • the base station that initiates the cooperation determines the resources to be allocated to the UE, and the other base stations other than the base station that initiates the cooperation in the COMP set cooperatively select the UE applicable to the resource, ie, the local
  • there is no priority constraint in the condition of collaborative initiation which can effectively increase the cooperation opportunity.
  • FIG. 1 is a coordinated multi-point transmission architecture diagram according to the related art
  • FIG. 2 is an asymmetric cooperation scenario diagram according to the related art
  • FIG. 3 is a processing flowchart of a base station cooperation method according to an embodiment of the present invention
  • 4 is a schematic structural view of a first embodiment of the present invention
  • FIG. 5 is a flowchart of an embodiment of a second embodiment of the present invention
  • FIG. FIG. 1 is a coordinated multi-point transmission architecture diagram according to the related art
  • FIG. 2 is an asymmetric cooperation scenario diagram according to the related art
  • FIG. 3 is a processing flowchart of a base station cooperation method according to an embodiment of the present invention
  • 4 is a schematic structural view of a first embodiment of the present invention
  • FIG. 5 is a flowchart of an embodiment of a second embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a base station cooperation system according to an embodiment of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
  • the method of setting the cell priority is generally preferred, and the cell is divided by the priority. When the resource is scheduled for the UE, the cell with the highest priority is selected first. It is an opportunity to reduce COMP collaboration. In fact, the interference received by the UEs in different base stations is not necessarily equal.
  • the embodiment of the present invention provides a base station cooperation method, where the processing flow is as shown in FIG. 3, and includes steps S302 to S304: Step S302: The base station that initiates cooperation determines resources to be allocated to the UE; S304. The other base stations other than the base station that initiates cooperation in the COMP set cooperatively select UEs applicable to the foregoing resources in the UEs that are managed by the UEs.
  • the COMP set includes all base stations that can perform allocation processing on the foregoing resources.
  • the base station that initiates the cooperation determines the resources to be allocated to the UE, and the other base stations other than the base station that initiates the cooperation in the COMP set cooperatively select the UE applicable to the resource, ie, the local
  • there is no priority constraint in the condition of collaborative initiation which can effectively increase the cooperation opportunity.
  • each UE determines its own measurement COMP set, wherein the measurement COMP set includes at least one sector, and the UE can detect at least one The downlink common pilot signal of the sector, and the downlink common pilot signal strength of at least one sector exceeds a preset threshold.
  • measuring COMP sets through relative intensity threshold control can reduce the cost of collaboration and increase revenue.
  • step S304 other base stations other than the base station that initiates cooperation in the COMP set cooperatively select UEs suitable for the foregoing resources in the respective managed UEs, and the processing flow is as follows: Other base stations determine the foregoing resources. Whether it has been pre-allocated to the specified one or more UEs, and selects a UE applicable to the above resources according to the judgment result. In a preferred embodiment, the other base station selects the UE that is applicable to the resource according to the judgment result.
  • the other base station selects the UE and the UE from the UE that does not participate in the pre-allocation.
  • the other base stations are paired, and the above resources are allocated to the successfully paired UE.
  • the channel information corresponding to different resources is different. Therefore, channel information can be used for pairing in the process of pairing. If the channel information can be paired successfully, the resources can be paired successfully, and then the resources may be allocated to the pairing. Successful UE.
  • the pairing result may be successful pairing, or the pairing may be unsuccessful.
  • the preferred processing manner includes If the pairing is successful, the other base station directly calculates the precoding matrix of the foregoing resource according to the channel information fed back by the successfully paired UE. If the configuration is unsuccessful, the preferred processing manner includes: the other base station calculates a precoding matrix of the foregoing resource according to the channel information fed back by the unsuccessful UE and the priority of the base station that initiates the cooperation.
  • the other base station combines the precoding matrix of the priority calculation resource of the base station that initiates the cooperation, and the preferred processing manner includes: when the priority of the base station that initiates cooperation is higher than the priority of other base stations, the other base station uses the feedback that does not include the specified UE.
  • the channel information is used to calculate a precoding matrix of the foregoing resources; when the priority of the base station initiating cooperation is lower than the priority of other base stations, the other base stations perform forced pairing on the designated UE, and calculate the precoding of the foregoing resources by using channel information fed back by the specified UE. matrix.
  • Embodiment 1 the structure shown in FIG. 4 is set, specifically including the following modules, and the functions of each module are listed: Pre-scheduling module: The original system needs to be modified to increase the pre-allocation function of the air interface resource; Module: Responsible for receiving channel measurement data transmitted by the UE through the air interface; Downstream precoding module: Modification in the original system, adding dynamic precoding function;
  • the base station cooperation method provided by the embodiment of the present invention includes steps 1 to 7: First, the UE detects all downlink common pilot signal strengths; and second step, if a downlink signal is relative to the signal strength of the service station If the threshold value is exceeded, the downlink signal is subjected to full bandwidth channel measurement, and all base stations exceeding the threshold constitute a measurement COMP set of the UE.
  • the uplink channel feedback module performs channel data according to the allocated resource information and channel data amount. Automatic particle size matching, sending channel data to the base station; fourth step, the uplink channel data receiving module detects the channel data and sends it to the COMP module; in the fifth step, the COMP module maintains the resource cooperation set, notifies the scheduling module to perform pre-scheduling, and The pre-scheduled resource information, channel information, and time information are sent to the corresponding base station according to the COMP set of the UE. Step 6: After receiving the sent information, the COMP module performs the following three pairing algorithms according to the COMP set:
  • the user is selected from the user who has not participated in the pre-allocation to be paired with the COMP set;
  • the user who uses the resource is paired with the COMP set. If the pairing is successful, the w is calculated, and the UE is resource-scheduled by using the successfully paired sector; 3. If the pairing is unsuccessful and the priority of the station (ie, the sector) is high, the channel information fed back by the station is not considered when calculating W, and the resource scheduling of the UE is not used by the station; if the pairing is unsuccessful, And the station has low priority, forced pairing, calculation W, and use the local station to perform resource scheduling for the UE. After determining whether the pairing is successful or unsuccessful, the downlink precoding matrix of the resources that can be scheduled is calculated according to the channel information of the service station and other stations in the COMP set. In the seventh step, the COMP module sends the precoding information to the downlink precoding module during resource scheduling.
  • the base station cooperation method and apparatus provided by the implementation of the present invention have the following advantages compared with the related technologies:
  • the interference elimination is highly targeted, and the interference is eliminated. If there is no interference, it is carried out according to the original process, with strong independence and quick response;
  • the asymmetric cooperation first adopts a cell based on the relative strength of the common pilot signal exceeding the threshold as the initial cooperation set of the UE, and the base station determines the resource cooperation set by the resource allocation to perform the second coordinated set control, and the two cooperative sets are more flexible.
  • the UE can be made smoother in cooperative mode and non-cooperative mode control;
  • Controlling the UE collaboration set through the relative strength threshold can make the collaboration cost small and the benefit is large.
  • FIG. 5 is a schematic diagram of an implementation scenario of the embodiment.
  • the architecture and specific network environment of each user, device, or entity in FIG. 5 are as follows: B2 has two sectors: CELLB and CELLc; B1 has CELLa below.
  • Sector has two sectors: CELLB and CELLc; B1 has CELLa below.
  • the current serving cell of UEa is CELLa, which is at the boundary of CELLa and P CELLb, so it can receive the interference signal of CELLb;
  • the current serving cell of UEb is CELLb; it is at the boundary of CELLb and CELLc, so it can receive the interference signal of CELLc;
  • the current serving cell of UEc is CELLc, which is at the boundary of three cells of CELLa and CELLB CELLc, so it can receive interference signals of CELLb and CELLa. It is assumed that the resources allocated by all three UEs overlap, and if they do not overlap, the precoding matrix does not need to be changed, and is still processed in the manner mentioned in the related art.
  • the processing flow of the specific cooperation method in this embodiment is as shown in FIG. 6, and includes steps S602 to S622.
  • RSRPs Receiveived Signal Code Power
  • Step S604 The UEb reports all the observed downlink RSRPs to the NB2, and reports the channel information if the threshold is exceeded. In this example, the channel information of the local station and the CELLc station is reported at the same time.
  • Steps S606 and B1 since only including CELLa, also called Ba), after receiving the report of the UEa, send the channel information of the CELLb measured by the UEa and the resource allocation information of the UEa to the B2-CELLb (abbreviated as Bb).
  • Step S608 After receiving the report of the UEb, the B2-CELLb sends the channel information of the CELLc measured by the UEb to the B2-CELLc b (abbreviated as Bc).
  • Steps S610 and B1 are precoding matrices generated by the UEA still using the related art.
  • Steps S612 and B1 send the resource allocation information of the UEa to the B2-CELLb.
  • Step S616 After receiving the report of the UEc, the B2-CELLc sends the channel information of the CELLb measured by the UEc and the resource allocation information of the UEc to the B2-CELLb, and sends the channel information of the CELLa measured by the UEc and the resource allocation information of the UEc to the Bl-CELLa.
  • Step S618 The B2-CELLB allocates to the UEb, and the same resource as the UEa or the UEc, calculates the UEb downlink precoding according to the maximum leakage ratio principle according to the CELLb channel measured by the UEa, the CELLb channel measured by the UEc, and the CELLb channel measured by the UEb. matrix.
  • Step S620 B2-CELLc calculates the precoding matrix of the UEc downlink according to the maximum leakage ratio principle according to the CELLc measured by the UEb and the CELLc channel measured by the UEc for the same resource allocated to the UEc and the UEc.
  • Step S622 The Bl-CELLa allocates the UEA, and the UEc is the same resource, and calculates the UEa downlink precoding matrix according to the maximum leakage ratio principle according to the CELLa channel measured by the UEc and the UEa measured by the UEa.
  • an embodiment of the present invention further provides a base station cooperation system, and a schematic structural diagram thereof is shown in FIG. 7.
  • the base station 701 that initiates cooperation and other base stations 702 other than the base station that initiates cooperation in the set of COMPs are initiated:
  • the base station 701 is configured to determine resources to be allocated to the UE;
  • the other base station 702 is connected to the base station 701 that initiates cooperation, and is configured to cooperatively select UEs suitable for resources in the respective managed UEs, where the COMP set includes all capable A base station that allocates resources for processing.
  • the base station 701 and other base stations 702 that initiate cooperation may also be configured to determine the UE's own measurement COMP set, wherein the measurement COMP set includes at least one sector, and the UE can detect a downlink common pilot signal of at least one sector, and a downlink common pilot signal strength of at least one sector exceeds a preset threshold.
  • the other base station 702 may further be configured to determine whether the resource has been pre-allocated to the designated one or more UEs; and select a UE applicable to the resource according to the determination result.
  • the other base stations 702 may also select the UE to be paired with other base stations from the UEs that do not participate in the pre-allocation, and allocate the foregoing resources to the successfully paired UEs. .
  • the other base station 702 may also pair with the designated UE if the foregoing resource has been pre-assigned to the designated UE.
  • the other base station 702 may be further configured to: if the pairing is successful, calculate the precoding matrix of the resource directly according to the channel information fed back by the successfully paired UE; if the pairing is unsuccessful, according to the unsuccessful UE feedback The channel information and the priority of the base station initiating the cooperation calculate the precoding matrix.
  • the precoding matrix is calculated by using channel information that does not include the feedback of the specified UE;
  • the priority of 701 is lower than the priority of other base stations 702
  • the designated UE is forcibly paired, and the precoding matrix is calculated by using the channel information fed back by the specified UE.
  • the UEs that are applicable to the resources are cooperatively selected in the UEs that are managed by the UEs.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.

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Abstract

本发明公开了一种基站协作方法及系统,该方法包括:发起协作的基站确定即将分配给UE的资源;由COMP集合中除发起协作的基站外的其他基站在各自管理的UE中协作选择适用于资源的UE,其中,COMP集合中包括所有能够对资源进行分配处理的基站。采用本发明在协作发起的条件中没有优先级的约束,能够有效增加协作机会。

Description

基站协作方法及系统 技术领域 本发明涉及通信领域, 具体而言, 涉及一种基站协作方法及系统。 背景技术 作为第四代通信系统 (4G ) 的标准, IMT- Advanced ( Intelligent Multimode
Terminal-Advanced, 改进的智能多模式终端) 对于系统的性能提出了更高的要求, 尤 其是对上下行的频率效率有更高的要求。
COMP (Coordinated multi-point transmission/reception, 协作多点传输) 是一种能 够扩大速率传输覆盖范围、提高小区边缘服务质量和吞吐量, 以及系统吞吐量的技术, 作为提高系统频谱利用率的重要技术, 得到了广泛的关注。 所谓协作多点传输, 即多 个基站协作传输, 服务于一个或多个 UE (User Equipment, 用户设备)。 3GPP定义的 C0MP包括 2种场景, 一种是多点协作调度, 即通过相邻节点之间交互调度信息, 达 到各个小区传输信号之间干扰得道协调; 另一种是多点联合处理, 即多个协作节点之 间通过共享数据及 CSI (Channel Situation Information, 信道状态信息)、 调度信息等, 联合为目标用户提供服务。 多点协作调度的优点各个节点间不需要交互太多的信息, 无线接口没有影响, 其缺点是无法获得协作传输增益, 对频谱利用效率的提高没有贡 献。 多点联合处理可以获得宏分集及协作传输增益, 可以获得高阶天线的处理增益。 其缺点是需要大量的数据信息和 CSI信息的交互, 复杂度高。 目前的协作多点传输架构图如图 1所示, 服务基站 (Serving eNode-B) 和协作基 站 (Collaborative eNode-B)之间通过光口 (X2 Interface)相连, 两个基站同时为 UE0 和 UE1提供资源, 目前 X2接口未定义。 位于小区边缘的用户与相邻小区的距离和服务小区的距离具有可比性, 服从于网 络 MIMO (Multi-Input Multi-Output, 多输入多输出) 的特点。 另夕卜, 边缘用户是主要 的干扰对象(下行受到临近小区的干扰, 同时上行会干扰临近小区)。 当前主要采用的 是 FFR (Fractional Frequency Reuse, 部分频率复用技术)和功率控制的手段, FFR主 要是干扰躲避的策略, 在这种方式下, 如果协同, 会为边缘用户带来较大的性能提升, 同时提高系统的总体性能。 现对 COMP的分类方式进行详细说明: ( 1 ) JP (Joint Processing, 联合传输), 指数据在协作集的基站上可用。 JP通常 包括如下 (a) (b) 2种情况:
(a) 联合传输 (JT), 即各个协作集内的 (全部或部分) 基站向 UE传输数据; 协作的基站向 UE同时发送数据(相关或不相关), 来提高接收信号质量或者主动 消除对其它 UE的干扰。
(b) DCS (Dynamic Channel Selection, 动态信道选择), 指 COMP集合中的一个 基站向 UE发送数据。
(2) CS/CB ( Coordinated Scheduling/Beamforming , 同等安排 /同等架构), 指数 据仅在服务基站可用, 但用户在协作集中调度或进行 beamforming。 另夕卜, 从链路方向考虑, COMP也可以分为: 上行链路(UL COMP)和下行链路
(DL COMP), 目前主要应用的是下行 COMP。 目前在标准讨论的时候, 基本倾向于设置小区优先级的方法, 利用优先级对小区 进行划分, 为 UE调度资源时, 首先选择优先级高的小区, 这种方法的缺陷是减少了 COMP协作的机会。 事实上, 不同基站下的 UE 收到的干扰不一定是对等的, 此时需要协作消除 UE 接受的干扰, 而相关技术中采用的优先级处理方式却减少了 COMP协作的机会, 可能 在需要协作消除干扰的情况下达不到该目的。例如,参见图 2, UE a除了收到基站 B1 的信号 a之外还能够收到 B2发过来的无线信号 b,而无线信号 b能够对 B1发过来 的信号 a形成干扰。而 UE b 却不一定收到 NB1的干扰信号 a, 因此两个基站下的 UE 收到干扰情况不一样的, 对是否需要协作消除干扰的要求也是不同的。 而对图 2的例 子, 只需要消除 UE a 收到的干扰就可以了, 而在实际运行中, 则必须对两个 UE均 进行干扰消除操作, 这会造成资源的浪费。 针对相关技术中减少了 COMP协作的机会、造成资源的浪费的问题, 目前尚未提 出有效的解决方案。 发明内容 本发明实施例的主要目的在于提供一种基站协作方法及系统, 以至少解决上述相 关技术中减少了 COMP协作的机会、 造成资源的浪费的问题。 根据本发明的一个实施例, 提供了一种基站协作方法, 包括: 发起协作的基站确 定即将分配给用户设备 (UE) 的资源; 由协作多点传输 (COMP) 集合中除所述发起 协作的基站外的其他基站在各自管理的 UE中协作选择适用于所述资源的 UE, 其中, 所述 COMP集合中包括所有能够对所述资源进行分配处理的基站。 优选的, 所述发起协作的基站确定即将分配给 UE的预分配资源之前, 还包括: 各 UE确定自身的测量 COMP集合,其中,所述测量 COMP集合中包括至少一个扇区, 所述 UE能够检测到所述至少一个扇区的下行公共导频信号, 且所述至少一个扇区的 下行公共导频信号强度超过预设门限值。 优选的, 由 COMP集合中除所述发起协作的基站外的其他基站在各自管理的 UE 中协作选择适用于所述资源的 UE,包括:所述其他基站判断所述资源是否已经被预分 配至指定的一个或多个 UE; 所述其他基站根据判断结果选择适用于所述资源的 UE。 优选的, 所述其他基站根据判断结果选择适用于所述资源的 UE, 包括: 若所述资 源没有被预分配至指定 UE, 所述其他基站从没有参与预分配的 UE中选择 UE与所述 其他基站配对, 并将所述资源分配给配对成功的 UE。 优选的, 所述其他基站根据判断结果选择适用于所述资源的 UE, 包括: 若所述资 源已经被预分配至指定 UE, 所述其他基站与所述指定 UE进行配对。 优选的, 所述其他基站与所述指定 UE进行配对, 包括: 如果配对成功, 所述其 他基站直接根据配对成功的 UE反馈的信道信息计算所述资源的预编码矩阵; 如果配 对不成功, 所述其他基站根据配对不成功的 UE反馈的信道信息以及所述发起协作的 基站的优先级计算所述预编码矩阵。 优选的, 所述其他基站结合所述发起协作的基站的优先级计算所述资源的预编码 矩阵, 包括: 所述发起协作的基站的优先级高于所述其他基站的优先级时, 所述其他 基站利用不包括所述指定 UE反馈的信道信息计算所述预编码矩阵; 所述发起协作的 基站的优先级低于所述其他基站的优先级时, 所述其他基站对所述指定 UE进行强制 配对, 并利用所述指定 UE反馈的信道信息计算所述预编码矩阵。 根据本发明的另一个实施例, 提供了一种基站协作系统, 包括发起协作的基站和 协作多点传输 (COMP) 集合中除所述发起协作的基站外的其他基站: 所述发起协作 的基站, 设置为确定即将分配给用户设备 (UE) 的资源; 所述其他基站, 设置为在各 自管理的 UE中协作选择适设置为所述资源的 UE, 其中, 所述 COMP集合中包括所 有能够对所述资源进行分配处理的基站。 优选的, 发起协作的基站以及所述其他基站还设置为令自身管理的 UE 的测量 COMP集合, 其中, 所述测量 COMP集合中包括至少一个扇区, 所述 UE能够检测到 所述至少一个扇区的下行公共导频信号, 且所述至少一个扇区的下行公共导频信号强 度超过预设门限值。 优选的, 所述其他基站还设置为判断所述资源是否已经被预分配至指定的一个或 多个 UE; 根据判断结果选择适设置为所述资源的 UE。 优选的,所述其他基站还设置为若所述资源没有被预分配至指定 UE,从没有参与 预分配的 UE中选择 UE与所述其他基站配对, 并将所述资源分配给配对成功的 UE。 优选的,所述其他基站还设置为若所述资源已经被预分配至指定 UE,与所述指定 UE进行配对。 优选的, 所述其他基站还设置为如果配对成功, 直接根据配对成功的 UE反馈的 信道信息计算所述资源的预编码矩阵; 如果配对不成功, 根据配对不成功的 UE反馈 的信道信息以及所述发起协作的基站的优先级计算所述预编码矩阵。 优选的, 所述其他基站还设置为所述发起协作的基站的优先级高于所述其他基站 的优先级时, 利用不包括所述指定 UE反馈的信道信息计算所述预编码矩阵; 所述发 起协作的基站的优先级低于所述其他基站的优先级时,对所述指定 UE进行强制配对, 并利用所述指定 UE反馈的信道信息计算所述预编码矩阵。 在本发明实施例中, 发起协作的基站确定即将分配给 UE的资源, 由 COMP集合 中除发起协作的基站外的其他基站在各自管理的 UE中协作选择适用于资源的 UE, S卩, 本发明实施例中在协作发起的条件中没有优先级的约束, 能够有效增加协作机会。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是根据相关技术的协作多点传输架构图; 图 2是根据相关技术的非对称协作场景图; 图 3是根据本发明实施例的基站协作方法的处理流程图; 图 4是根据本发明实施例的实施例一中设置的结构示意图; 图 5是根据本发明实施例的实施例二的实施案场景图; 图 6是根据本发明实施例的实施例二的处理流程图; 图 7是根据本发明实施例的基站协作系统的结构示意图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 相关技术中提到, 目前在标准讨论的时候, 基本倾向于设置小区优先级的方法, 利用优先级对小区进行划分, 为 UE调度资源时, 首先选择优先级高的小区, 这种方 法的缺陷是减少了 COMP协作的机会。 事实上, 不同基站下的 UE收到的干扰不一定 是对等的, 此时需要协作消除 UE接受的干扰, 而相关技术中采用的优先级处理方式 却减少了 COMP协作的机会, 可能在需要协作消除干扰的情况下达不到该目的, 且会 造成资源的浪费。 为解决上述技术问题, 本发明实施例提供了一种基站协作方法, 其处理流程如图 3所示, 包括步骤 S302至步骤 S304: 步骤 S302、 发起协作的基站确定即将分配给 UE的资源; 步骤 S304、由 COMP集合中除发起协作的基站外的其他基站在各自管理的 UE中 协作选择适用于上述资源的 UE; 其中, COMP集合中包括所有能够对上述资源进行分配处理的基站。 在本发明实施例中, 发起协作的基站确定即将分配给 UE的资源, 由 COMP集合 中除发起协作的基站外的其他基站在各自管理的 UE中协作选择适用于资源的 UE, S卩, 本发明实施例中在协作发起的条件中没有优先级的约束, 能够有效增加协作机会。 在一个优选的实施例中,发起协作的基站确定即将分配给 UE的预分配资源之前, 各 UE确定自身的测量 COMP集合, 其中, 测量 COMP集合中包括至少一个扇区, UE能够检测到至少一个扇区的下行公共导频信号,且至少一个扇区的下行公共导频信 号强度超过预设门限值。 实施时, 通过相对强度门限控制测量 COMP集合, 能够减少 协作的代价, 增加收益。 实施时, 如图 3所示流程, 步骤 S304由 COMP集合中除发起协作的基站外的其 他基站在各自管理的 UE中协作选择适用于上述资源的 UE, 其处理流程如下: 其他基 站判断上述资源是否已经被预分配至指定的一个或多个 UE,并根据判断结果选择适用 于上述资源的 UE。 在一个优选的实施例中,其他基站会根据判断结果选择适用于资源的 UE,具体的, 若上述资源没有被预分配至指定 UE, 则其他基站从没有参与预分配的 UE中选择 UE 与所述其他基站配对, 并将上述资源分配给配对成功的 UE。 实施时, 不同资源对应的信道信息是不一样的, 因此, 在配对的过程中可以利用 信道信息进行配对, 若信道信息能够配对成功, 就代表资源能够配对成功, 进而可能 将上述资源分配给配对成功的 UE。 具体的, 从另外一个角度说, 若资源已经被预分配至指定 UE, 则其他基站与指定 UE进行配对。 实施时, 配对结果可能是配对成功, 也可能是配对不成功, 根据配对结果的不同, 是否为 UE调度预调度的资源的确定结果也不同, 实施时, 若配对成功, 则优选的处 理方式包括: 如果配对成功, 其他基站直接根据配对成功的 UE反馈的信道信息计算 上述资源的预编码矩阵。 若配置不成功, 优选的处理方式包括: 其他基站根据配对不成功的 UE反馈的信 道信息以及发起协作的基站的优先级计算上述资源的预编码矩阵。 此处其他基站结合发起协作的基站的优先级计算资源的预编码矩阵, 其优选的处 理方式包括: 发起协作的基站的优先级高于其他基站的优先级时,其他基站利用不包括指定 UE 反馈的信道信息计算上述资源的预编码矩阵; 发起协作的基站的优先级低于其他基站的优先级时, 其他基站对指定 UE进行强 制配对, 并利用指定 UE反馈的信道信息计算上述资源的预编码矩阵。 为将本发明实施例提供基站协作方法阐述地更清楚更明白, 现以具体实施例进行 说明。
实施例一 本实施例中设置了如图 4所示的结构, 具体包括如下各模块, 并列举了各模块的 功能: 预调度模块: 在原来系统需要改动, 增加空口资源的预分配功能; 上行信道数据接收模块: 负责接收 UE通过空口传过来的信道测量数据; 下行预编码模块: 在原来系统进行改动, 增加动态预编码功能;
COMP模块: 新增模块, 维护 UE协作集, 资源协作集, 预编码矩阵 W计算, 和 临站交互资源、 信道、 时间、 预编码等信息。 上行信道反馈模块: 完成对干扰信道的反馈; 信道测量模块: 完成对服务站、 干扰站信道的测量。 基于上述结构, 本发明实施例提供的基站协作方法包括步骤一至步骤七: 第一步、 UE检测所有的下行公共导频信号强度; 第二步、 如果某个下行信号相对于服务站的信号强度超过门限值, 则对该下行信 号进行全带宽信道测量, 所有超过门限的基站构成 UE的测量 COMP集; 第三步、 上行信道反馈模块把信道数据根据分配的资源信息、 信道数据量, 进行 自动粒度匹配, 把信道数据发给基站; 第四步、 上行信道数据接收模块把信道数据检出, 发给 COMP模块; 第五步、 COMP模块维护资源协作集, 通知调度模块进行预调度, 并根据 UE的 COMP集把预调度的资源信息、 信道信息以及时间信息发给对应的基站; 第六步、 COMP模块收到发过来的信息后, 根据 COMP集合, 进行如下三种配对 算法:
1、如果相应的资源没有被预分配,则从没有参与预分配的用户选择用户与 COMP 集合进行配对;
2、 如果相应的资源已经被预分配, 则和使用该资源的用户与 COMP集合进行配 对, 如果配对成功, 则计算 w, 利用配对成功的扇区对 UE进行资源调度; 3、 如果配对不成功, 并且本站 (即扇区) 优先级高, 则计算 W的时候不考虑本 站反馈过来的信道信息, 也不利用本站对 UE进行资源调度; 如果配对不成功, 并且本站优先级低, 强制配对, 计算 W, 并利用本站对 UE进 行资源调度。 在确定配对成功或者不成功之后,根据 COMP集合中的服务站和其他站的信道信 息计算能够调度的资源的下行预编码矩阵。 第七步、 COMP模块在资源调度时把预编码信息发给下行预编码模块。 采用本发明实施提供的基站协作方法和装置, 与相关技术相比, 具有以下优势:
1、 干扰消除针对性强, 有干扰就消除, 没有干扰则按照原来的流程进行, 独立性 强, 反应快;
2、 协作发起条件中没有优先级的约束, 可以有效增加协作机会;
3、 非对称协作减少了不必要的信息反馈;
4、非对称协作首先采取基于公共导频信号相对强度超过门限的小区作为 UE的初 始协作集, 基站通过资源分配决定资源协作集来进行第二次协作集控制, 两个协作集 控制更加灵活, 可以使得 UE在协作模式和非协作模式控制上更加平滑;
5、 通过相对强度门限控制 UE协作集, 可以使协作代价小, 收益大。
实施例二 图 5是本实施例的实施场景图, 在图 5中各用户、 设备或实体的架构以及具体的 网络环境如下: B2下面有 CELLb, CELLc两个扇区; B1下面有 CELLa—个扇区;
UEa目前服务小区为 CELLa,处于 CELLa禾 P CELLb的边界,因此能够收到 CELLb 的干扰信号; UEb目前服务小区为 CELLb;处于 CELLb和 CELLc的边界,因此能够收到 CELLc 的干扰信号;
UEc 目前服务小区为 CELLc, 处于 CELLa、 CELLb CELLc三个小区的边界, 因此能够收到 CELLb、 CELLa的干扰信号。 假定三个 UE都分配的资源都重叠, 如果不重叠则预编码矩阵不用改变, 仍然按 照相关技术中提到的方式处理。 本实施例的具体协作方法的处理流程如图 6所示, 包括步骤 S602至步骤 S622: 步骤 S602、UEa向所属 B1报告观测到的所有下行的 RSRP(Received Signal Code Power, 下行公共导频信号强度, 也可以使用其他参量代替), 如果超过门限则上报信 道信息, 本例会同时上报本站以及 CELLb站的信道信息。 步骤 S604、 UEb向所属 NB2报告观测到的所有下行的 RSRP, 如果超过门限则上 报信道信息, 本例同时上报本站以及 CELLc站的信道信息。 步骤 S606、 B1 (由于只包括 CELLa, 也称为 Ba) 收到 UEa 的报告后, 向 B2-CELLb (简称 Bb)发送 UEa测量的 CELLb的信道信息, UEa的资源分配信息。 步骤 S608、 B2-CELLb 收到 UEb的报告后, 向 B2-CELLc b (简称 Bc) 发 送 UEb测量的 CELLc的信道信息。 步骤 S610、 B1对 UEa仍然使用相关技术的方式产生的预编码矩阵。 步骤 S612、 B1向 B2-CELLb发送 UEa的资源分配信息。 步骤 S614、 UEc向所属 B2-CELLC报告观测到的所有下行的 RSRP, 并同时上 报本站以及 CELLb、 CELLc两个站的信道信息。 步骤 S616、 B2-CELLc收到 UEc的报告后, 向 B2-CELLb发送 UEc测量的 CELLb的信道信息以及 UEc的资源分配信息;向 Bl-CELLa发送 UEc测量的 CELLa 的信道信息以及 UEc的资源分配信息。 步骤 S618、 B2-CELLB对分配给 UEb, 并且和 UEa或者 UEc相同的资源, 根据 UEa测量的 CELLb信道、 UEc测量的 CELLb信道以及 UEb测量的 CELLb信道, 依 据最大泄漏比原则计算 UEb下行的预编码矩阵。 步骤 S620、 B2-CELLc对分配给 UEc, 并且 UEc相同的资源, 根据 UEb测量的 CELLc以及 UEc测量的 CELLc信道, 依据最大泄漏比原则计算 UEc下行的预编码矩 阵。 步骤 S622、 Bl-CELLa对分配给 UEa, 并且 UEc相同的资源, 根据 UEc测量的 CELLa、 UEa测量的 CELLa信道, 依据最大泄漏比原则计算 UEa下行的预编码矩阵。 其中 B2CELLB, NB2-CELLC之间的协作由于处于同一个 B下, 因此不通过 x2接口进行协作, 通过共享变量等方式进行; B1和 B2之间的协作通过 x2接口进 行。 基于同一发明构思, 本发明实施例还提供了一种基站协作系统, 其结构示意图如 图 7所示,包括发起协作的基站 701和 COMP集合中除发起协作的基站外的其他基站 702: 发起协作的基站 701, 设置为确定即将分配给 UE的资源; 其他基站 702,与发起协作的基站 701相连,设置为在各自管理的 UE中协作选择 适用于资源的 UE, 其中, COMP集合中包括所有能够对资源进行分配处理的基站。 在一个实施例中, 优选的, 发起协作的基站 701以及其他基站 702还可以设置为 令自身管理的 UE确定自身的测量 COMP集合,其中,测量 COMP集合中包括至少一 个扇区, UE能够检测到至少一个扇区的下行公共导频信号,且至少一个扇区的下行公 共导频信号强度超过预设门限值。 在一个实施例中, 优选的, 其他基站 702还可以设置为判断上述资源是否已经被 预分配至指定的一个或多个 UE; 根据判断结果选择适用于上述资源的 UE。 在一个实施例中, 优选的, 其他基站 702还可以若上述资源没有被预分配至指定 UE, 从没有参与预分配的 UE中选择 UE与其他基站配对, 并将上述资源分配给配对 成功的 UE。 在一个实施例中, 优选的, 其他基站 702还可以若上述资源已经被预分配至指定 UE, 与指定 UE进行配对。 在一个实施例中, 优选的, 其他基站 702还可以设置为如果配对成功, 直接根据 配对成功的 UE反馈的信道信息计算资源的预编码矩阵; 如果配对不成功, 根据配对 不成功的 UE反馈的信道信息以及发起协作的基站的优先级计算预编码矩阵。 在一个实施例中, 优选的, 其他基站 702还可以发起协作的基站 701的优先级高 于其他基站 702的优先级时, 利用不包括指定 UE反馈的信道信息计算预编码矩阵; 发起协作的基站 701的优先级低于其他基站 702的优先级时, 对指定 UE进行强制配 对, 并利用指定 UE反馈的信道信息计算预编码矩阵。 从以上的描述中, 可以看出, 本发明实现了如下技术效果: 在本发明实施例中, 发起协作的基站确定即将分配给 UE的资源, 由 COMP集合 中除发起协作的基站外的其他基站在各自管理的 UE中协作选择适用于资源的 UE, S卩, 本发明实施例中在协作发起的条件中没有优先级的约束, 能够有效增加协作机会。 显然, 本领域的技术人员应该明白, 上述的本发明的各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模块, 或者将 它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限制于任 何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种基站协作方法, 包括:
发起协作的基站确定即将分配给用户设备 UE的资源;
由协作多点传输 COMP 集合中除所述发起协作的基站外的其他基站在各 自管理的 UE中协作选择适用于所述资源的 UE, 其中, 所述 COMP集合中包 括所有能够对所述资源进行分配处理的基站。
2. 根据权利要求 1所述的方法, 其中, 所述发起协作的基站确定即将分配给 UE 的预分配资源之前, 还包括:
各 UE确定自身的测量 COMP集合,其中,所述测量 COMP集合中包括至 少一个扇区, 所述 UE能够检测到所述至少一个扇区的下行公共导频信号, 且 所述至少一个扇区的下行公共导频信号强度超过预设门限值。
3. 根据权利要求 1所述的方法, 其中, 由 COMP集合中除所述发起协作的基站外 的其他基站在各自管理的 UE中协作选择适用于所述资源的 UE, 包括:
所述其他基站判断所述资源是否已经被预分配至指定的一个或多个 UE; 所述其他基站根据判断结果选择适用于所述资源的 UE。
4. 根据权利要求 3所述的方法, 其中, 所述其他基站根据判断结果选择适用于所 述资源的 UE, 包括: 若所述资源没有被预分配至指定 UE, 所述其他基站从没 有参与预分配的 UE中选择 UE与所述其他基站配对, 并将所述资源分配给配 对成功的 UE。
5. 根据权利要求 3所述的方法, 其中, 所述其他基站根据判断结果选择适用于所 述资源的 UE, 包括: 若所述资源已经被预分配至指定 UE, 所述其他基站与所 述指定 UE进行配对。
6. 根据权利要求 5所述的方法, 其中, 所述其他基站与所述指定 UE进行配对, 包括:
如果配对成功, 所述其他基站直接根据配对成功的 UE反馈的信道信息计 算所述资源的预编码矩阵; 如果配对不成功, 所述其他基站根据配对不成功的 UE反馈的信道信息以 及所述发起协作的基站的优先级计算所述预编码矩阵。
7. 根据权利要求 6所述的方法, 其中, 所述其他基站结合所述发起协作的基站的 优先级计算所述资源的预编码矩阵, 包括:
所述发起协作的基站的优先级高于所述其他基站的优先级时, 所述其他基 站利用不包括所述指定 UE反馈的信道信息计算所述预编码矩阵;
所述发起协作的基站的优先级低于所述其他基站的优先级时, 所述其他基 站对所述指定 UE进行强制配对, 并利用所述指定 UE反馈的信道信息计算所 述预编码矩阵。
8. 一种基站协作系统,包括发起协作的基站和协作多点传输 COMP集合中除所述 发起协作的基站外的其他基站:
所述发起协作的基站, 设置为确定即将分配给用户设备 UE的资源; 所述其他基站, 设置为在各自管理的 UE 中协作选择适用于所述资源的 UE, 其中, 所述 COMP集合中包括所有能够对所述资源进行分配处理的基站。
9. 根据权利要求 8所述的系统, 其中, 所述发起协作的基站以及所述其他基站还 用于令自身管理的 UE于确定自身的测量 COMP集合, 其中, 所述测量 COMP 集合中包括至少一个扇区, 所述 UE能够检测到所述至少一个扇区的下行公共 导频信号, 且所述至少一个扇区的下行公共导频信号强度超过预设门限值。
10. 根据权利要求 8所述的系统, 其中, 所述其他基站还设置为判断所述资源是否 已经被预分配至指定的一个或多个 UE; 根据判断结果选择适用于所述资源的
11. 根据权利要求 10所述的系统,其中,所述其他基站还设置为若所述资源没有被 预分配至指定 UE, 从没有参与预分配的 UE中选择 UE与所述其他基站配对, 并将所述资源分配给配对成功的 UE。
12. 根据权利要求 10所述的系统,其中,所述其他基站还设置为若所述资源已经被 预分配至指定 UE, 与所述指定 UE进行配对。
13. 根据权利要求 12所述的系统, 其中, 所述其他基站还设置为如果配对成功, 直 接根据配对成功的 UE反馈的信道信息计算所述资源的预编码矩阵; 如果配对 不成功, 根据配对不成功的 UE反馈的信道信息以及所述发起协作的基站的优 先级计算所述预编码矩阵。 根据权利要求 13所述的系统,其中,所述其他基站还设置为所述发起协作的基 站的优先级高于所述其他基站的优先级时, 利用不包括所述指定 UE反馈的信 道信息计算所述预编码矩阵; 所述发起协作的基站的优先级低于所述其他基站 的优先级时, 对所述指定 UE进行强制配对, 并利用所述指定 UE反馈的信道 信息计算所述预编码矩阵。
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