WO2013071895A1 - 对用户设备进行切换判决的方法、装置和系统 - Google Patents

对用户设备进行切换判决的方法、装置和系统 Download PDF

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Publication number
WO2013071895A1
WO2013071895A1 PCT/CN2012/084830 CN2012084830W WO2013071895A1 WO 2013071895 A1 WO2013071895 A1 WO 2013071895A1 CN 2012084830 W CN2012084830 W CN 2012084830W WO 2013071895 A1 WO2013071895 A1 WO 2013071895A1
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Prior art keywords
neighboring cell
user equipment
cell
information
base station
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PCT/CN2012/084830
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English (en)
French (fr)
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张涛
蔺波
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华为技术有限公司
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Publication of WO2013071895A1 publication Critical patent/WO2013071895A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a system for performing handover decision on a UE (User Equipment). Background technique
  • Heterogeneous networks such as HetNet
  • HetNet some low-power nodes are deployed in the coverage of a macro cell, which may be an RRH (Remote Radio Head), a small base station (Pico eNB), or a HeNB (Home eNB).
  • a macro cell which may be an RRH (Remote Radio Head), a small base station (Pico eNB), or a HeNB (Home eNB).
  • a home base station a RN (Relay Node), and a wireless LAN access point (such as a WiFi AP).
  • the cells of these low-power nodes can be called because the coverage is smaller than that of the macro cell. It is a small cell (Micro/Pico/Femto cell).
  • the above macro cell provides seamless coverage for the UE, and the above small area increases the capacity of the system.
  • a method for performing a handover decision on a UE in the prior art is: the base station to which the serving cell belongs determines the size of each neighboring cell according to some a priori information, and selects a different TTT (timeToTrigger) for each neighboring cell according to the size of each neighboring cell. Trigger time) value. For example, the TTT value corresponding to the macro cell is large. You can use TTTbig to indicate that the TTT value corresponding to the small cell is small and can be represented by TTTsmall.
  • the base station to which the serving cell belongs sends the TTT value of each neighboring cell to the UE.
  • the UE measures that an adjacent cell always satisfies the entry condition of the A3 measurement event in the corresponding TTT, that is, the signal strength or signal quality of the neighboring cell is always higher than the serving cell in its corresponding TTT. If the signal strength or the signal quality reaches a set threshold, the UE reports the identity of the neighboring cell to the base station to which the serving cell belongs.
  • the base station to which the serving cell belongs After receiving the neighboring cell reported by the UE, the base station to which the serving cell belongs performs a handover decision on the neighboring cell to determine whether to switch the U E to the neighboring cell.
  • the method for performing the handover decision on the U E in the prior art has at least the following problem:
  • the base station to which the serving cell belongs is configured with the same TTT value for different cells of the same UE, which may easily lead to inaccurate handover decisions.
  • Embodiments of the present invention provide a method, apparatus, and system for performing handover decision on a UE, so as to enable a handover decision to be more accurate when a unified TTT value is configured for at least one neighboring cell.
  • a method for performing a handover decision on a user equipment, where the base station to which the serving cell belongs sets the unified trigger time value of the at least one neighboring cell to the user equipment including:
  • the base station to which the serving cell belongs receives the measurement report of the identifier information of the neighboring cell that is reported by the user equipment, and the identifier information of the neighboring cell is obtained after the user equipment performs the handover related measurement according to the trigger time value, and the service is obtained.
  • the base station to which the cell belongs acquires the size information of the neighboring cell according to the identifier information of the neighboring cell;
  • the base station to which the serving cell belongs performs handover decision for the user equipment according to the size information of the neighboring cell and the set handover decision policy.
  • An apparatus for performing a handover decision on a user equipment comprising:
  • a trigger time value processing module configured to set a unified trigger time value for the at least one neighboring cell of the user equipment, and send the trigger time value to the user equipment;
  • a measurement report receiving module configured to receive, by the user equipment, a measurement report that includes the identifier information of the neighboring cell, where the identifier information of the neighboring cell is obtained by the user equipment performing handover related measurement according to the trigger time value;
  • a measurement report decision module configured to acquire, according to the identifier information of the neighboring cell received by the measurement report receiving module, size information of the neighboring cell, according to the size information of the neighboring cell and the set handover decision policy, A handover decision is made for the user equipment.
  • a user equipment including:
  • the information receiving module is configured to receive a unified trigger time value of the at least one neighboring cell sent by the base station to which the serving cell belongs, where the trigger time value is the smallest according to the area of all neighboring cells of the serving cell Determined by the size of the neighboring cell;
  • the measurement reporting processing module is configured to obtain the identification information of the neighboring cell after performing the handover related measurement according to the triggering time value, and report the measurement report including the identifier information of the neighboring cell to the base station to which the serving cell belongs.
  • a system for making a handover decision for a user equipment comprising the apparatus and the user equipment.
  • the embodiment of the present invention implements a unified small TTT value for both the macro cell and the small cell, and does not need to change the existing standard, and the technical solution can be Used by the UE.
  • FIG. 1 is a process flow diagram of a method for performing handover decision on a U E according to Embodiment 1 of the present invention
  • FIG. 2 is a specific structural diagram of an apparatus for performing handover handover on a UE according to Embodiment 2 of the present invention
  • FIG. 3 is a specific structural diagram of a UE according to Embodiment 2 of the present invention
  • FIG. 4 is a specific structural diagram of a system for performing handover determination on a UE according to Embodiment 2 of the present invention. detailed description
  • the processing flow of the method for performing handover decision on the U E provided by this embodiment is as shown in FIG. 1 , and includes the following processing steps:
  • Step 1 The base station to which the serving cell belongs sends the set value of the unified TTT for the at least one neighboring cell to the UE.
  • the base station to which the serving cell belongs sets a unified TTT value and a reporting period T of the measurement report for the at least one neighboring cell of the UE, where the value of the TTT is determined according to the size of the neighboring cell with the smallest area among all neighboring cells of the serving cell. Specifically, the value of the TTT may be set by considering the size of the neighboring cell with the smallest area, the size of the serving cell, the set handover failure rate of the entire network, and the ping-pong switching rate. When the serving cell itself is a small cell, a relatively small value of the above TTT may be set.
  • the value of the above TTT can be set to 40ms.
  • the reporting period T is used to instruct the UE to periodically report the measurement report according to the reporting period T.
  • the base station to which the serving cell belongs sets the value of the TTT and the reporting period T of the measurement report Sent to the UE.
  • Step 12 The base station to which the serving cell belongs receives the measurement report of the information about the neighboring cell reported by the UE.
  • the UE After receiving the value of the TTT and the reporting period T of the measurement report, the UE measures the signal strength or signal quality of each neighboring cell according to the A3 measurement event specified by the 3GPP protocol, if the UE measures a TTT value of a neighboring cell.
  • the entry condition of the A3 measurement event is always satisfied in the time period, that is, the signal strength or quality is always higher than the signal strength of the serving cell or the signal quality reaches a set threshold within the time period of the above TTT value, then The UE uses the measurement reporting process to send a measurement report including the identification information of the neighboring cell to the base station to which the serving cell belongs.
  • the UE uses the measurement reporting process to send the identifier information including the multiple neighboring cells to the base station to which the serving cell belongs. The measurement.
  • the operation of the UE transmitting the foregoing measurement report to the base station to which the serving cell belongs is periodically repeated according to the reporting period T of the measurement report, that is, the UE starts the timing operation of the reporting period T immediately after the first measurement report is sent. After the above timing is over, the measurement report is sent again, and then the timing operation of the above >3 ⁇ 4 cycle T is started again, and the cycle is repeated.
  • the UE uses the measurement reporting process to send the identity information including the new neighboring cell to the base station to which the serving cell belongs. Measurement report. Then, the timing of the previous reporting period T is reset to 0, and the timing operation of the reporting period T is restarted. After the timing is finished, the measurement report including the identification information of the new neighboring cell and the previously reported neighboring cell is transmitted again. .
  • Step 13 The base station to which the serving cell belongs acquires the size information of the neighboring cell according to the identifier information of the neighboring cell, and determines the UE according to the size information of the neighboring cell and the set handover decision policy.
  • the base station to which the serving cell belongs acquires the size information of the neighboring cell according to the identifier information and the a priori information of the neighboring cell, where the a priori information includes OAM (Operation Administration) And maintenance, operation, management, and maintenance), the information about each cell configured by the system, and/or the history information of the UE received by the base station to which the serving cell belongs when the UE switches to the serving cell, where the information about each cell includes the size of each cell, Information such as coverage, the foregoing UE history information includes size information of a cell in which the UE has recently camped.
  • OAM Opera Administration
  • maintenance operation, management, and maintenance
  • the base station to which the serving cell belongs determines that the neighboring cell is a small cell according to the size information of the neighboring cell, the base station to which the serving cell belongs immediately performs a handover decision on the neighboring cell for the UE. .
  • the base station to which the serving cell belongs delays the handover decision of the neighboring cell, and continues to receive the UE.
  • a measurement report periodically reported when the number of times the base station to which the serving cell belongs receives the measurement report including the neighboring cell reaches a set value N, the base station to which the serving cell belongs is directed to the UE Performing a handover decision on the neighboring cell. Therefore, although the embodiment of the present invention sends a unified TTT value to the UE, the TTT value for actually performing the handover decision for the macro cell is TTT + n*T, where ⁇ is in the range of [0, ⁇ -1].
  • the above random number ⁇ is because the above >3 ⁇ 4 period of the UE may be returned to 0 at any time.
  • the embodiment of the present invention implements a unified small threshold for both the macro cell and the small cell, and does not need to change existing standards, and the technical solution can be Used by the UE.
  • the measurement reporting process of the U ⁇ is set to be periodic, for the macro cell and the small cell, and the measurement process of the U ⁇ is set to be periodic, so that the target cell is a virtual cell and a small cell Different, this can reduce the failure rate of the UE to the small cell handover on the one hand, and keep the probability of the ping-pong handover of the entire network below an acceptable threshold on the other hand.
  • Embodiment 2
  • the embodiment of the present invention further provides a device for performing a handover decision on a U , , the device is set in a base station to which the serving cell of the UE belongs, and the specific structure thereof is as shown in FIG. 2 , where the device specifically includes:
  • the TTT value processing module 21 is configured to set a uniform threshold for the at least one neighboring cell of the UE, and send the threshold to the UE;
  • the measurement report receiving module 22 is configured to receive, by the U ⁇ , a measurement report of the identification information of the cell including the cell, where the neighboring cell is obtained by performing handover related measurement according to the threshold value by the UE; And acquiring, according to the identifier information of the neighboring cell received by the measurement report receiving module 22, the size information of the neighboring cell, according to the size information of the neighboring cell and the set handover decision policy, for the UE Make a handover decision.
  • the specific threshold processing module 21 is further configured to set a unified threshold for the at least one neighboring cell of the UE and a reporting period of the measurement report, where the threshold is the smallest according to the area of all neighboring cells of the serving cell. Specifically, the size of the neighboring cell is determined. Specifically, the size of the neighboring cell with the smallest area, the size of the serving cell, the set handover failure rate of the entire network, and the ping-pong switching rate may be comprehensively set. . When the serving cell itself is a small cell, a value smaller than the above ⁇ may be set.
  • the reporting period is used to instruct the UE to periodically report the measurement report; and send the threshold and the reporting period of the measurement report to the U ⁇ .
  • the measurement report determining module 22 is further configured to acquire the size information of the neighboring cell according to the identifier information and the a priori information of the neighboring cell received by the measurement report receiving module, where the priori The information includes information about each cell configured by the system and/or historical information of the U ;;
  • the measurement report decision module 22 may further include:
  • the first decision processing module 221 is configured to: when determining, according to the size information of the neighboring cell acquired by the size information acquiring module 221 of the neighboring cell, that the neighboring cell is a small cell, perform the Handover decision of the neighboring cell;
  • the second decision processing module 222 is configured to continue to receive the U ⁇ period report when determining that the neighboring cell is a macro cell according to the size information of the neighboring cell acquired by the size information acquiring module 221 of the neighboring cell. a measurement report containing information of the neighboring cell, when receiving the measurement report When the number of times reaches the set value, a handover decision for the neighboring cell is performed for the UE. Therefore, although the embodiment of the present invention sends a unified TTT value to the UE, the TTT value of the handover decision for the macro cell is actually TTT + n*T, where ⁇ is in the range of [0, ⁇ -1 ] The random number ⁇ is because the above reporting period of U ⁇ may be returned to zero at any time.
  • the embodiment further provides a UE, and the specific structure thereof is as shown in FIG. 3, including:
  • the information receiving module 31 is configured to receive, by the base station to which the serving cell belongs, a unified threshold for at least one neighboring cell of the UE, where the threshold is the smallest neighbor according to the area of all neighboring cells of the serving cell. Determined by the size of the cell;
  • the measurement report processing module 32 after performing the handover related measurement according to the threshold, obtains the identification information of the neighboring cell, and reports the measurement report including the identifier information of the neighboring cell to the base station to which the serving cell belongs.
  • the information receiving module 31 is further configured to receive a reporting period of the measurement report sent by the base station to which the serving cell belongs, where the reporting period is used to instruct the UE to periodically report the report according to the reporting period. Measuring report;
  • the measurement report processing module 32 is further configured to periodically report, to the base station to which the serving cell belongs, a measurement report including the identifier information of the neighboring cell according to the reporting period.
  • the measurement reporting processing module 32 is further configured to: when the at least one neighboring cell always meets an entry condition of the A3 measurement event, in the time period of the threshold, use the measurement reporting process to the service
  • the base station to which the cell belongs sends a measurement report including the identifier information of the at least one neighboring cell, starts a timer operation of the timer of the reporting period, and after the timer of the timer ends, transmits the measurement report again, and then, The timing operation of the timer of the reporting period is started again, and the process is repeated.
  • the measurement reporting processing module 32 is further configured to use the measurement reporting process to the service if it detects that the new neighboring cell meets the entry condition of the A3 measurement event during the timing of the timer of the reporting period.
  • the base station to which the cell belongs sends a test including the identification information of the new neighboring cell
  • the quantity report then resetting the timing of the timer of the previous reporting period T to 0, restarting the timing operation of the timer of the reporting period T, and after the timer is finished, transmitting the new A measurement report of the identification information of the neighboring cell and the previously reported neighboring cell.
  • the embodiment further provides a system for performing handover decision on a UE.
  • the specific structure is as shown in FIG. 4, and includes: a device for performing handover decision on a UE, and a UE.
  • the specific structure of the above device is shown in FIG. 2, and the specific structure of the UE is as shown in FIG. 3.
  • the specific process of using the device and the system in the embodiment of the present invention to perform the handover decision on the U E is similar to the foregoing method embodiment, and details are not described herein again.
  • a person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • ROM read-only memory
  • RAM random access memory
  • the measurement reporting process of the UE is set to be periodic, for the macro cell and the small cell, and the TTT value that is actually valid when the target cell is a macro cell and a small cell is not used.
  • the failure rate of the UE to the small cell handover can be reduced, and on the other hand, the probability of the ping-pong handover of the entire network can be kept below an acceptable threshold.

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Abstract

本发明实施例提供了一种对UE（User Equipment，用户设备）进行切换判决的方法、装置和系统，该方法主要包括：服务小区所属的基站将设置的针对至少一个邻小区的统一的触发时间（Time to Trigger，TTT）值发送给用户设备，服务小区所属的基站接收用户设备上报的包含邻小区的标识信息的测量报告，所述邻小区的标识信息为所述用户设备根据所述触发时间值进行切换相关测量后得到的；所述服务小区所属的基站获取所述邻小区的大小信息，根据所述邻小区的大小信息和设定的切换判决策略，针对所述用户设备对进行切换判决。本发明实施例实现了针对宏小区和小小区都配置统一的较小的TTT值，不需要改动现有标准，技术方案可以被现有UE所使用。

Description

对用户设备进行切换判决的方法、 装置和系统
本申请要求了于 2011 年 11 月 18 日提交中国专利局， 申请号为 201110369266.X, 发明名称为 "对用户设备进行切换判决的方法、 装置和系 统" 的中国申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及无线通信技术领域， 尤其涉及一种对 UE ( User Equipment, 用户设备）进行切换判决的方法、 装置和系统。 背景技术
异构网络， 如， HetNet, 作为一种新的网络部署， 正逐渐被引入到下一 代无线网络中。 在 HetNet中， 一些低功率节点被部署在宏小区 （ Macro cell ) 的覆盖范围内， 这些低功率节点可以是 RRH ( Remote Radio Head , 拉远天 线） 、 小基站（Pico eNB ) 、 HeNB ( Home eNB , 家用基站） 、 RN ( Relay Node, 中继站）和无线局域网接入点 （例如 WiFi AP ) 中的一种或几种， 这 些低功率节点的小区由于覆盖范围相比宏小区较小， 可以被称为小小区 ( Micro/Pico/Femto cell ) 。 上述宏小区为 UE提供了无缝的覆盖， 上述小小 区提高了系统的容量。
现有技术中的一种对 U E进行切换判决的方法为： 服务小区所属的基站根 据一些先验信息判断各个邻小区的大小， 根据各个邻小区的大小为各个邻小 区选取不同的 TTT ( timeToTrigger, 触发时间）值。 比如， 宏小区对应的 TTT 值较大，可以使用 TTTbig表示，小小区对应的 TTT值较小，可以使用 TTTsmall 表示。 服务小区所属的基站将各个邻小区的 TTT值发送给 UE。
如果 UE测量到一个邻小区在对应的 TTT内总是满足 A3测量事件的进入 条件，即该邻小区的信号强度或信号质量在其对应的 TTT内总是高于服务小区 的信号强度或信号质量达到一个设定的门限值， 则 UE使用测量上报过程将该 邻小区的标识上报给服务小区所属的基站。
服务小区所属的基站接收到 UE上报的上述邻小区后， 对上述邻小区进行 切换判决， 以决定是否将该 U E切换到上述邻小区。 现有技术中的对 U E进行切换判决的方法至少存在如下问题： 现有技术中 服务小区所属的基站为同一个 UE的不同小区配置相同的 TTT值， 容易导致切 换判决的不准确。 发明内容 本发明的实施例提供了一种对 UE进行切换判决的方法、 装置和系统， 以 实现了在为至少一个邻小区都配置统一的 TTT值情况下，能够使得切换判决更 准确。
一种对用户设备进行切换判决的方法， 服务小区所属的基站将设置的针 对至少一个邻小区的统一的触发时间值发送给用户设备， 包括：
服务小区所属的基站接收用户设备上报的包含邻小区的标识信息的测量 报告， 所述邻小区的标识信息为所述用户设备根据所述触发时间值进行切换 相关测量后得到的， 并且所述服务小区所属的基站根据所述邻小区的标识信 息获取所述邻小区的大小信息；
所述服务小区所属的基站根据所述邻小区的大小信息和设定的切换判决 策略， 针对所述用户设备进行切换判决。
一种对用户设备进行切换判决的装置， 所述装置包括：
触发时间值处理模块， 用于针对所述用户设备的至少一个邻小区设置统 一的触发时间值， 将所述触发时间值发送给所述用户设备；
测量报告接收模块， 用于接收用户设备上报的包含邻小区的标识信息的 测量报告， 所述邻小区的标识信息为所述用户设备根据所述触发时间值进行 切换相关测量后得到的； 测量报告判决模块， 用于根据所述测量报告接收模块所接收到的所述邻 小区的标识信息获取所述邻小区的大小信息， 根据所述邻小区的大小信息和 设定的切换判决策略， 针对所述用户设备进行切换判决。
一种用户设备， 包括：
信息接收模块， 用于接收服务小区所属的基站下发的针对所述用户设备 的至少一个邻小区的统一的触发时间值， 所述触发时间值根据所述服务小区 的所有邻小区中的面积最小的邻小区的大小而确定；
测量上报处理模块， 用于根据所述触发时间值进行切换相关测量后得到 邻小区的标识信息， 向所述服务小区所属的基站上报包含所述邻小区的标识 信息的测量报告。 一种对用户设备进行切换判决的系统， 包括所述的装置和所述的用户设 备。 由上述本发明的实施例提供的技术方案可以看出， 本发明实施例实现了 针对宏小区和小小区都配置统一的较小的 TTT值， 不需要改动现有标准，技术 方案可以被现有 UE所使用。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例描述中所 需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发 明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动性的 前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例一提供的一种对 U E进行切换判决的方法的处理流程 图；
图 2为本发明实施例二提供的一种对 UE进行切换判决的装置的具体结构 图；
图 3为本发明实施例二提供的一种 U E的具体结构图； 图 4为本发明实施例二提供的一种对 UE进行切换判决的系统的具体结构 图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地描述， 显然， 所描述的实施例是本发明一部分实施例， 而不是全部的实施例。 基于 本发明中的实施例， 本领域普通技术人员在没有作出创造性劳动前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
为便于对本发明实施例的理解， 下面将结合附图以几个具体实施例为例 实施例一
该实施例提供的一种对 U E进行切换判决的方法的处理流程如图 1所示， 包括如下的处理步骤：
步骤 1 1 , 服务小区所属的基站将设置的针对至少一个邻小区的统一的 TTT的值发送给 UE。
服务小区所属的基站针对 UE的至少一个邻小区设置统一的 TTT的值和测 量报告的上报周期 T, 所述 TTT的值根据所述服务小区的所有邻小区中的面积 最小的邻小区的大小而确定， 具体的， 可以综合考虑上述面积最小的邻小区 的大小， 以及所述服务小区的大小、 设定的整个网络的切换失败率、 乒乓切 换率来设置上述 TTT的值。 当所述服务小区自身是小小区时，可以设置比较小 的上述 TTT的值。
在实际应用中， 上述 TTT的值可以设置为 40ms。
所述上报周期 T用于指示所述 UE根据所述上报周期 T周期性上报测量报 告。
所述服务小区所属的基站将所述 TTT的值和所述测量报告的上报周期 T 发送给所述 UE。
步骤 12、 服务小区所属的基站接收 UE上报的包含邻小区的信息的测量报 告。
UE接收到上述 TTT的值和所述测量报告的上报周期 T后， 按照 3GPP协议 规定的 A3测量事件对各个邻小区的信号强度或者信号质量进行测量，如果 UE 测量到一个邻小区在上述 TTT值的时间段内总是满足 A3测量事件的进入条 件，即其信号强度或者质量在上述 TTT值的时间段内总是高于服务小区的信号 强度或信号质量达到一个设定的门限值， 则 UE使用测量上报过程向上述服务 小区所属的基站发送包含上述邻小区的标识信息的测量报告。
如果 UE在上述 TTT值的时间段内， 测量到多个邻小区总是满 LA3测量事 件的进入条件， 则 UE使用测量上报过程向上述服务小区所属的基站发送包含 上述多个邻小区的标识信息的测量 告。
UE向上述服务小区所属的基站发送上述测量报告的操作是按照上述测量 报告的上报周期 T周期性重复的， 即 UE在第一次发送了上述测量报告后， 立 即启动上述上报周期 T的计时操作， 在上述计时结束后， 再次发送测量报告， 然后， 再次启动上述上>¾周期 T的计时操作， 周而复始。
在上述上报周期 T的计时过程中， 如果 U E又检测到新的邻小区满 LA3测 量事件的进入条件， 则 U E使用测量上报过程向上述服务小区所属的基站发送 包含上述新的邻小区的标识信息的测量报告。 然后， 将以前的上述上报周期 T 的计时归 0, 重新启动上述上报周期 T的计时操作， 在上述计时结束后， 再次 发送包含上述新的邻小区和以前上报的邻小区的标识信息的测量报告。
步骤 13、 所述服务小区所属的基站根据所述邻小区的标识信息获取所述 邻小区的大小信息， 根据所述邻小区的大小信息和设定的切换判决策略， 针 对所述 UE进行判决。
所述的服务小区所属的基站根据所述邻小区的标识信息和先验信息获取 所述邻小区的大小信息， 所述先验信息包括 OAM ( Operation Administration and Maintenance, 操作、 管理和维护） 系统配置的各小区相关信息和 /或所 述 UE切换到该服务小区时服务小区所属的基站接收的 UE历史信息，上述各小 区相关信息包括各个小区的大小、覆盖范围等信息， 上述 UE历史信息包括 UE 最近驻留过小区的大小信息。
当所述的服务小区所属的基站根据所述邻小区的大小信息确定所述邻小 区为小小区时， 则所述的服务小区所属的基站针对所述 UE立即执行对所述邻 小区的切换判决。
当所述的服务小区所属的基站根据所述邻小区的大小信息确定所述邻小 区为宏小区时， 所述的服务小区所属的基站延后对该邻小区的切换判决， 继 续接收所述 UE周期上报的测量报告， 当所述的服务小区所属的基站接收到包 含有所述邻小区的测量报告的次数达到了设定的数值 N时，则所述的服务小区 所属的基站针对所述 UE执行对所述邻小区的切换判决。 因此， 本发明实施例 虽然给 UE下发一个统一的 TTT值， 但在实际上针对宏小区进行切换判决的 TTT值为 TTT + n*T,其中 η为 [0， Ν-1]范围内的随机数，上述随机数 η是因为 UE 的上述上 >¾周期 Τ可能随时归 0。 由上述本发明的实施例提供的技术方案可以看出， 本发明实施例实现了 针对宏小区和小小区都配置统一的较小的 ΤΤΤ值， 不需要改动现有标准，技术 方案可以被现有 UE所使用。
本发明实施例还通过针对宏小区和小小区釆取不同的切换判决策略， 将 U Ε的测量上报过程设为周期性的， 使得目标小区是宏小区和小小区时其实际 生效的 ΤΤΤ值并不相同， 这样一方面可以降低 UE向小小区切换的失败率， 另 一方面可以使整个网络的乒乓切换的概率保持在一个可以接受的门限以下。 实施例二
本发明实施例还提供了一种对 U Ε进行切换判决的装置， 该装置设置于所 述 UE的服务小区所属的基站中， 其具体结构如图 2所示， 所述装置具体包括： TTT值处理模块 21 , 用于针对所述 UE的至少一个邻小区设置统一的 ΤΤΤ 值， 将所述 ΤΤΤ值发送给所述 UE;
测量报告接收模块 22， 用于接收 U Ε上报的包含部小区的标识信息的测量 报告， 所述邻小区为所述 UE根据所述 ΤΤΤ值进行切换相关测量后得到的； 测量报告判决模块 22, 用于根据所述测量报告接收模块 22所接收到的所 述邻小区的标识信息获取所述邻小区的大小信息， 根据所述邻小区的大小信 息和设定的切换判决策略， 针对所述 UE进行切换判决。
具体的所述的 ΤΤΤ值处理模块 21 , 还用于针对 UE的至少一个邻小区设置 统一的 ΤΤΤ值和测量报告的上报周期，所述 ΤΤΤ值根据所述服务小区的所有邻 小区中的面积最小的邻小区的大小而确定， 具体的， 可以综合考虑上述面积 最小的邻小区的大小， 以及所述服务小区的大小、 设定的整个网络的切换失 败率、 乒乓切换率来设置上述 ΤΤΤ的值。 当所述服务小区自身是小小区时， 可 以设置比较小的上述 ΤΤΤ的值。 所述上报周期用于指示所述 UE周期性上报所 述测量报告； 将所述 ΤΤΤ值和所述测量报告的上报周期发送给所述 U Ε。
具体的， 所述的测量报告判决模块 22, 还用于根据所述测量报告接收模 块所接收到的所述邻小区的标识信息和先验信息获取所述邻小区的大小信 息， 所述先验信息包括 ΟΑΜ系统配置的各小区相关信息和 /或所述 U Ε的历史 信息；
具体的， 所述的测量报告判决模块 22还可以包括：
第一判决处理模块 221， 用于当根据所述邻小区的大小信息获取模块 221 所获取的所述邻小区的大小信息确定所述邻小区为小小区时， 则针对所述 UE 执行对所述邻小区的切换判决；
或者，
第二判决处理模块 222, 用于当根据所述邻小区的大小信息获取模块 221 所获取的所述邻小区的大小信息确定所述邻小区为宏小区时， 继续接收所述 U Ε周期上报的包含所述邻小区的信息的测量报告， 当接收到所述测量报告的 次数达到了设定的数值时， 则针对所述 UE执行对所述邻小区的切换判决。 因 此， 本发明实施例虽然给 UE下发一个统一的 TTT值， 但在实际上针对宏小区 进行切换判决的 TTT值为 TTT + n*T, 其中 η为 [0， Ν-1 ]范围内的随机数， 上述 随机数 η是因为 U Ε的上述上报周期 Τ可能随时归 0。 该实施例还提供了一种 UE, 其具体结构如图 3所示， 包括：
信息接收模块 31， 用于接收服务小区所属的基站下发的针对所述 UE的至 少一个邻小区的统一的 ΤΤΤ值，所述 ΤΤΤ值根据所述服务小区的所有邻小区中 的面积最小的邻小区的大小而确定；
测量上报处理模块 32, 根据所述 ΤΤΤ值进行切换相关测量后得到邻小区 的标识信息， 用于向所述服务小区所属的基站上报包含所述邻小区的标识信 息的测量报告。
具体的， 所述的信息接收模块 31 , 还用于接收所述服务小区所属的基站 下发的测量报告的上报周期， 所述上报周期用于指示所述 UE根据所述上报周 期周期性上报所述测量报告；
具体的， 所述的测量上报处理模块 32, 还用于按照所述上报周期， 周期 性向所述服务小区所属的基站上报包含所述邻小区的标识信息的测量报告。
进一步地， 所述的测量上报处理模块 32 , 还用于在所述 ΤΤΤ值的时间段 内， 测量到至少一个邻小区总是满足 A3测量事件的进入条件， 则使用测量上 报过程向所述服务小区所属的基站发送包含所述至少一个邻小区的标识信息 的测量报告， 启动所述上报周期的计时器的计时操作， 在所述计时器的计时 结束后， 再次发送所述测量报告， 然后， 再次启动所述上报周期的计时器的 计时操作， 周而复始。
所述的测量上报处理模块 32， 还用于在所述上报周期的计时器的计时过 程中， 如果又检测到新的邻小区满足 A3测量事件的进入条件， 则使用测量上 报过程向所述服务小区所属的基站发送包含所述新的邻小区的标识信息的测 量报告， 然后， 将以前的所述上报周期 T的计时器的计时归 0, 重新启动上述 上报周期 T的计时器的计时操作， 在所述计时器的计时结束后， 再次发送包含 所述新的邻小区和以前上报的邻小区的标识信息的测量报告。
该实施例还提供了一种对 UE进行切换判决的系统， 其具体结构如图 4所 示， 包括： 对 UE进行切换判决的装置和 UE。 上述装置的具体结构如图 2所示， 上述 UE的具体结构如图 3所示。 应用本发明实施例的装置、 系统对 U E进行切换判决的具体过程与前述方 法实施例类似， 此处不再赘述。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流 程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于 一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施 例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（ Read-Only Memory, ROM )或随机存储记忆体（ Random Access Memory, RAM )等。 综上所述， 本发明实施例实现了针对宏小区和小小区都配置统一的较小 的 TTT值， 不需要改动现有标准， 技术方案可以被现有 UE所使用。
本发明实施例还通过针对宏小区和小小区釆取不同的切换判决策略， 将 U E的测量上报过程设为周期性的， 使得目标小区是宏小区和小小区时其实际 生效的 TTT值并不相同， 这样一方面可以降低 UE向小小区切换的失败率， 另 一方面可以使整个网络的乒乓切换的概率保持在一个可以接受的门限以下。
以上所述， 仅为本发明较佳的具体实施方式， 但本发明的保护范围并不 局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可 轻易想到的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明 的保护范围应该以权利要求的保护范围为准。

Claims

权 利 要求 书
1、 一种对用户设备进行切换判决的方法， 其特征在于， 包括：
服务小区所属的基站将设置的针对所述用户设备的至少一个邻小区的统一 的触发时间值发送给用户设备；
服务小区所属的基站接收用户设备上报的包含邻小区的标识信息的测量报 告， 所述邻小区的标识信息为所述用户设备根据所述触发时间值进行切换相关 测量后得到的， 并且所述服务小区所属的基站根据所述邻小区的标识信息获取 所述邻小区的大小信息；
所述服务小区所属的基站根据所述邻小区的大小信息和设定的切换判决策 略， 针对所述用户设备进行切换判决。
2、 根据权利要求 1所述的对用户设备进行切换判决的方法， 其特征在于， 所述服务小区所属的基站将设置的针对至少一个邻小区的统一的触发时间值发 送给用户设备， 包括：
服务小区所属的基站针对用户设备的至少一个邻小区设置统一的触发时间 值和测量报告的上报周期， 所述触发时间值根据所述服务小区的至少一个邻小 区中的面积最小的邻小区的大小而确定， 所述上报周期用于指示所述用户设备 根据所述上报周期周期性上报所述测量报告；
所述服务小区所属的基站将所述触发时间值和所述测量报告的上报周期发 送给所述用户设备。
3、 根据权利要求 2所述的方法， 其特征在于， 所述触发时间值根据所述服 务小区的所有邻小区中的面积最小的邻小区的大小而确定， 包括：
所述触发时间值根据所述服务小区的所有邻小区中的面积最小的邻小区的 大小以及所述服务小区的大小而确定。
4、 根据权利要求 1所述的方法， 其特征在于， 所述服务小区所属的基站根 据所述邻小区的标识信息获取所述邻小区的大小信息， 包括：
所述服务小区所属的基站根据所述邻小区的标识信息和先验信息获取所述 邻小区的大小信息， 所述先验信息包括操作、 管理和维护 OAM系统配置的小区 相关信息和 /或所述用户设备的历史信息。
5、 根据权利要求 1至 4任一项所述的方法， 其特征在于， 所述根据所述邻小 区的大小信息和设定的切换判决策略， 针对所述用户设备进行切换判决， 包括： 当所述的服务小区所属的基站根据所述邻小区的大小信息确定所述邻小区 为小小区时， 所述的服务小区所属的基站针对所述用户设备执行对所述邻小区 的切换判决； 或，
当所述的服务小区所属的基站根据所述邻小区的大小信息确定所述邻小区 为宏小区时， 所述的服务小区所属的基站确定接收到所述测量报告的次数达到 了设定的数值， 所述的服务小区所属的基站针对所述用户设备执行对所述邻小 区的切换判决。
6、 一种对用户设备进行切换判决的装置， 其特征在于， 所述装置包括： 触发时间值处理模块， 用于针对所述用户设备的至少一个邻小区设置统一 的触发时间值， 将所述触发时间值发送给所述用户设备；
测量报告接收模块， 用于接收用户设备上报的包含邻小区的标识信息的测 量报告， 所述邻小区的标识信息为所述用户设备根据所述触发时间值进行切换 相关测量后得到的；
测量报告判决模块， 用于根据所述测量报告接收模块所接收到的所述邻小 区的标识信息获取所述邻小区的大小信息， 根据所述邻小区的大小信息和设定 的切换判决策略， 针对所述用户设备进行切换判决。
7、 根据权利要求 6所述的对用户设备进行切换判决的装置， 其特征在于： 所述的触发时间值处理模块， 还用于针对用户设备的至少一个邻小区设置 统一的触发时间值和测量报告的上报周期， 所述触发时间值根据所述服务小区 的所有邻小区中的面积最小的邻小区的大小而确定， 所述上报周期用于指示所 述用户设备所述上报周期周期性上报所述测量报告； 将所述触发时间值和所述 测量报告的上报周期发送给所述用户设备。
8、 根据权利要求 6所述的对用户设备进行切换判决的装置， 其特征在于： 所述的测量报告判决模块， 具体用于根据所述测量报告接收模块所接收到 的所述邻小区的标识信息和先验信息获取所述邻小区的大小信息， 所述先验信 息包括操作、 管理和维护 OAM系统配置的各小区相关信息和 /或所述用户设备的 历史信息。
9、 根据权利要求 8所述的对用户设备进行切换判决的装置， 其特征在于， 所述的测量报告判决模块还包括：
第一判决处理模块， 用于当根据所述邻小区的大小信息获取模块所获取的 邻小区的大小信息确定所述邻小区为小小区时， 则针对所述用户设备执行对所 述邻小区的切换判决；
或者，
第二判决处理模块， 用于当根据所述邻小区的大小信息获取模块所获取的 邻小区的大小信息确定所述邻小区为宏小区时， 接收到所述测量报告的次数达 到了设定的数值时， 则针对所述用户设备执行对所述邻小区的切换判决。
10、 一种用户设备， 其特征在于， 包括：
信息接收模块， 用于接收服务小区所属的基站下发的针对所述用户设备的 至少一个邻小区的统一的触发时间值， 所述触发时间值根据所述服务小区的所 有邻小区中的面积最小的邻小区的大小而确定；
测量上报处理模块， 用于根据所述触发时间值进行切换相关测量后得到邻 小区的标识信息， 向所述服务小区所属的基站上报包含所述邻小区的标识信息 的测量报告。
1 1、 根据权利要求 10所述的用户设备， 其特征在于：
所述的信息接收模块， 还用于接收所述服务小区所属的基站下发的测量报 告的上报周期， 所述上报周期用于指示所述用户设备根据所述上报周期周期性 上报所述测量报告；
所述的测量上报处理模块， 还用于按照所述上报周期， 周期性向所述服务 小区所属的基站上报包含所述邻小区的标识信息的测量报告。
12、 根据权利要求 10所述的用户设备， 其特征在于：
所述的测量上报处理模块， 还用于在所述触发时间值的时间段内， 测量到 至少一个邻小区总是满足 A3测量事件的进入条件， 则向所述服务小区所属的基 站发送包含所述至少一个邻小区的标识信息的测量报告。
13、 根据权利要求 12所述的用户设备， 其特征在于：
所述的测量上报处理模块， 还用于在上报周期的计时器的计时过程中， 如 果检测到新的邻小区满足 A3测量事件的进入条件， 则向所述服务小区所属的基 站发送包含所述新的邻小区的标识信息的测量报告， 将所述上报周期的计时器 的计时归 0, 重新启动所述上报周期的计时器的计时操作， 在所述计时器的计时 结束后， 发送包含所述新的邻小区的标识信息和以前上报的邻小区的标识信息 的测量报告。
14、 一种对用户设备进行切换判决的系统， 其特征在于， 包括如权利要求 6 至 9任一项所述的装置和权利要求 10至 13任一项所述的用户设备。
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