WO2013091557A1 - 无线通信***中的用户设备切换方法、用户设备及基站 - Google Patents

无线通信***中的用户设备切换方法、用户设备及基站 Download PDF

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Publication number
WO2013091557A1
WO2013091557A1 PCT/CN2012/087033 CN2012087033W WO2013091557A1 WO 2013091557 A1 WO2013091557 A1 WO 2013091557A1 CN 2012087033 W CN2012087033 W CN 2012087033W WO 2013091557 A1 WO2013091557 A1 WO 2013091557A1
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WIPO (PCT)
Prior art keywords
user equipment
base station
location information
distribution map
serving base
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PCT/CN2012/087033
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English (en)
French (fr)
Inventor
肖登坤
韩静
李安俭
陈德
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华为技术有限公司
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Publication of WO2013091557A1 publication Critical patent/WO2013091557A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a user equipment handover method, a user equipment, and a base station in a wireless communication system.
  • the handover of the UE is based on the measurement result of the electrical signal, for example, the measurement result according to RSRP (Reference Signal Receiving Power)/RSRQ (Reference Signal Receiving Quality). To decide to switch.
  • RSRP Reference Signal Receiving Power
  • RSRQ Reference Signal Receiving Quality
  • the UE performs handover in the prior art, it only judges according to the measurement result of the electrical signal.
  • the number of handovers will be greatly increased.
  • the UE cannot move to the neighboring cell, resulting in unnecessary handover, increasing the number of unnecessary handovers of the UE in the network of the complex topology, thereby increasing unnecessary letters.
  • the load causes the spectral efficiency of the system to decrease.
  • the embodiment of the invention provides a user equipment switching method, a user equipment and a base station in a wireless communication system, which are used to reduce unnecessary handover of the user equipment.
  • An embodiment of the present invention provides a user equipment switching method in a wireless communication system, including: acquiring location information of a user equipment and a neighboring base station distribution map of the serving base station of the user equipment; and measuring an electrical signal according to the user equipment And determining, by the location information of the user equipment, a neighboring base station distribution map of the serving base station of the user equipment, whether the user equipment is switched.
  • the embodiment of the present invention further provides a user equipment in a wireless communication system, including: a handover decision unit, configured to perform, according to an electrical signal measurement result of the user equipment, location information of the user equipment, and a serving base station of the user equipment
  • the neighbor base station distribution map determines whether the user equipment switches.
  • the embodiment of the invention further provides a base station, including:
  • a geographic information acquiring unit configured to acquire location information of the user equipment and a neighbor base station distribution map of the serving base station of the user equipment;
  • a handover determining unit configured to determine, according to the electrical signal measurement result of the user equipment, the location information of the user equipment, and the neighbor base station distribution map of the serving base station of the user equipment, whether the user equipment is switched.
  • the user equipment switching method, the user equipment, and the base station in the wireless communication system further determine whether the UE is handed over according to the neighbor base station distribution map of the serving base station of the UE, so that the location where the UE is located and a neighboring base station Although the linear distance is short, according to the actual street or road distribution displayed by the neighbor base station distribution map, if the user holding the UE cannot enter the cell of the neighboring base station, the UE is guaranteed not to switch, and the UE is reduced in complexity. Unnecessary switching in a network of topologies.
  • FIG. 1 is a flowchart of a user equipment switching method in a wireless communication system according to an embodiment of the present invention
  • FIG. 2 is a signaling flowchart of still another method for user equipment handover in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a user equipment in a wireless communication system according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the user equipment switching method in the wireless communication system provided by the embodiment of the present invention includes: acquiring location information of the UE and a neighboring base station distribution map of the serving base station of the UE; and determining, according to the electrical signal measurement result of the UE, the location information of the UE and The neighbor base station distribution map of the serving base station of the UE determines whether the UE has a handover.
  • the UE determines whether the UE has a handover according to the electrical signal measurement result of the UE, the location information of the UE, and the neighbor base station distribution map of the serving base station of the UE.
  • the location information of the UE such as the coordinates of the UE, may be obtained by using a GPS (Global Positioning System) positioning
  • the neighbor base station distribution map such as an electronic map, a coordinate distribution, etc., may be passed by the serving base station of the UE through the GI S ( g loba l informa t ion sys tem, GIS) obtained.
  • the UE receives the neighbor base station distribution map sent by the serving base station.
  • the serving base station according to the electrical signal measurement result of the UE, the location information of the user equipment And a neighboring base station distribution map of the serving base station of the UE, determining whether the UE has a handover.
  • the serving base station receives the measurement report sent by the UE, where the measurement report includes the electrical signal measurement result and the location information of the UE.
  • the neighbor base station distribution map may be a coordinate distribution of each neighboring base station of the serving base station.
  • the coordinate distribution can have streets, road information, and the like.
  • the UE After determining that the handover occurs, the UE sends a handover request to the serving base station to notify the serving base station to perform handover.
  • the UE determines whether the UE performs handover according to the neighbor base station distribution map of the serving base station of the UE, so that when the location where the UE is located and the linear distance of a neighboring base station are shorter, the actual street is displayed according to the neighbor base station distribution map.
  • the road distribution in the case that the user holding the UE cannot enter the cell of the neighboring base station, ensuring that the UE does not switch, and avoiding unnecessary handover of the UE in the complex topology network, thereby reducing the The necessary signaling load increases system throughput.
  • FIG. 1 is a signaling flowchart of a user equipment handover method in a wireless communication system according to an embodiment of the present invention.
  • a mobile UE is communicating with a serving base station, such as an evolved Node B (Evolved Base Station), and the UE has a positioning function, such as a GPS function, which can locate itself through the positioning function.
  • a serving base station such as an evolved Node B (Evolved Base Station)
  • the UE has a positioning function, such as a GPS function, which can locate itself through the positioning function.
  • a positioning function such as a GPS function
  • Step 11 The serving eNB sends a neighbor base station distribution map to the UE.
  • the neighbor base station distribution map is similar to the on-board electronic map, which identifies the distribution of each neighboring base station, or may further include street information, rivers, building information, and the like.
  • the neighbor base station distribution map may also be a distribution map of coordinates of each neighbor base station including the serving base station.
  • the format in which the serving base station stores or transmits the neighbor base station distribution map to the UE may be in the following two manners: one is to identify the base station in a message format, for example, coordinates, and to indicate the direction and flow direction of each street or river to the UE by using an angle; The other is to send the image directly to the UE.
  • the serving eNB sends the message to the UE through the measurement configuration (measurement conf ig ir ir) and the threshold value of the handover decision "d- thresho ld".
  • d_then The conditions necessary to indicate that the UE has a handover: The distance from the UE to the target base station is d_thresho ld.
  • Step 12 The UE determines whether the handover occurs by analyzing the location information of each neighboring base station in the neighbor base station distribution map, and the location obtained by the GPS, and according to the electrical signal strength of the UE.
  • the handover criterion is: the UE to the target base station.
  • the distance d_ thresho ld this condition can be used as a supplement to the original electrical signal as a handover decision.
  • determining whether a handover occurs can be achieved by:
  • the UE sorts each neighboring cell according to the measured electrical signal information (for example, RSRP or RSRQ), selects a cell with a higher electrical signal strength, such as cell A and cell B, as the target cell set, and then according to the neighboring base station distribution map (for example, a distribution map).
  • the coordinate position of the section is included, as well as the street information), and the most suitable cell is selected as the target cell.
  • cell A has the highest RSRP signal strength, but the distance from the UE to the cell is relatively long, and based on the street information on the neighbor base station map (e.g., the direction of the street), the UE will not move to cell A. Therefore, the UE selects other cells in the target cell set, such as cell B, as the target cell. Thereby avoiding unnecessary switching.
  • deciding whether a switchover can occur is accomplished by:
  • the UE selects a cell that is closer to the UE from the UE according to the neighboring base station distribution map (for example, the coordinate position of the neighboring cell in the distribution map, and the street information), and the cell in the street direction is used as the target cell set, that is, the candidate set, and then the UE.
  • the neighboring base station distribution map for example, the coordinate position of the neighboring cell in the distribution map, and the street information
  • the cell in the street direction is used as the target cell set, that is, the candidate set, and then the UE.
  • cells with better signal strength or signal quality are selected according to the measured RSRP or RSRQ to avoid unnecessary handover.
  • determining whether the user equipment is switched based on the neighboring base station distribution map, the location information of the user equipment, and the like is not limited thereto, and other implementation manners are not described herein.
  • a handover procedure is performed, such as steps 13 to 16 illustrated below; otherwise, the flow is terminated without switching.
  • Step 1 3 The UE sends a handover request message to the serving eNB.
  • the "Handover Request" message is used to inform the serving eNB that the UE intends to perform the handover.
  • Step 14 The serving eNB sends a handover request (HO reque s t ) message to the target eNB;
  • Step 15 The target eNB returns a handover request response (HO reque s t ACK ) message to the serving eNB.
  • Step 16 The serving eNB sends a handover command (HO Command) to the UE, and the UE completes the handover.
  • the UE further determines whether to perform handover according to the distribution map of the neighboring base station and the threshold of the handover decision sent by the serving eNB, thereby avoiding unnecessary handover of the UE in the network of the complex topology, thereby reducing Unnecessary signaling load increases system throughput.
  • FIG. 2 is a signaling flowchart of still another method for user equipment handover in a wireless communication system according to an embodiment of the present invention.
  • a mobile UE is communicating with a serving eNB, and the UE has a GPS function, and can locate itself through the positioning function.
  • it includes:
  • Step 21 The UE sends a measurement report (including the coordinate information of the UE and the electrical signal measured by the UE) to the serving eNB;
  • the UE may add the location information of the UE in the "Measurement Repor t" message sent to the serving eNB.
  • the serving eNB may use this measurement report as one of the criteria for determining whether the UE has switched.
  • Step 22 The serving eNB determines, according to the measurement report sent by the UE, and the neighboring base station distribution map, whether the UE has a handover.
  • Step 2 3 If it is determined that the UE has a handover, step 2 3 is performed; otherwise, the process ends without switching.
  • Step 23 The serving eNB sends a handover request (HO reque s t ) to the target eNB;
  • Step 24 The target eNB returns a handover request response (HO reque st ACK) to the serving eNB.
  • Step 25 The serving eNB sends a handover command (HO Command) to the UE, and the UE completes the handover.
  • the serving eNB further determines whether to perform handover according to the neighboring base station distribution map and the threshold value of the handover decision, and can more accurately determine whether handover is needed, thereby avoiding unnecessary UE in the complex topology network. Switching, which reduces unnecessary signaling load and increases system throughput.
  • a person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the steps of the foregoing method embodiments are included; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • FIG. 3 is a schematic structural diagram of user equipment in a wireless communication system according to an embodiment of the present invention.
  • the method for the UE to implement the foregoing embodiment shown in FIG. 1 includes: a geographic information acquiring unit 31 and a handover determining unit 32.
  • the UE further includes a function module such as a mobile signal transceiving unit and a positioning unit for acquiring its own position information, such as a GPS unit, which is not the focus of the present invention, and therefore will not be described herein.
  • the geographic information acquiring unit 31 is configured to acquire location information of the user equipment and a neighbor base station distribution map of the serving base station of the user equipment.
  • the geographic information acquisition unit 31 may include a positioning unit for acquiring location information of itself.
  • the geographic information acquiring unit 31 can obtain the neighbor base station distribution map and the threshold by receiving the message sent by the serving base station.
  • the handover determining unit 32 is configured to determine whether the UE has a handover according to the electrical signal measurement result of the UE, the location information of the UE, and the neighbor base station distribution map of the serving base station of the UE.
  • the neighbor base station distribution map is a coordinate distribution of each neighboring base station of the serving base station.
  • the UE provided by the embodiment of the present invention may further include: a handover requesting unit 33, configured to send a handover request to the serving base station.
  • the UE further determines whether to perform handover according to the distribution map of the neighboring base station and the threshold of the handover decision sent by the serving eNB by using the handover determining unit, thereby avoiding unnecessary handover of the UE in the network of the complex topology structure. , thereby reducing unnecessary signaling load and increasing system throughput.
  • the UE provided by the embodiment of the present invention may further include a reporting unit, configured to send a measurement report to the serving base station, where the measurement report includes an electrical signal measurement result and location information of the user equipment.
  • the UE is made applicable to both the method of the embodiment shown in Fig. 1 and the method of the embodiment shown in Fig. 2.
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station serves as a serving base station of the UE, and is used to implement the method in the foregoing embodiment shown in FIG. 2, including: The unit 41 and the handover decision unit 42 are taken.
  • the base station further includes functional modules such as a mobile signal transceiver unit, a radio frequency processing unit, a baseband processing unit, and a GIS unit for acquiring a neighbor base station distribution map, which are not the focus of the present invention. Therefore, it is not described in this article.
  • the location information obtaining unit 41 is configured to acquire location information of the user equipment and a neighbor base station distribution map of the serving base station of the user equipment.
  • the location information obtaining unit 41 may be specifically configured to receive a measurement report sent by the user equipment, where the measurement report includes an electrical signal measurement result and location information of the user equipment.
  • the location information acquisition unit 41 may further include a GIS unit to acquire a neighbor base station distribution map.
  • the handover determining unit 42 is configured to determine whether the UE has a handover according to the electrical signal measurement result of the UE, the location information of the UE, and the neighbor base station distribution map of the serving base station of the UE.
  • the base station serving as the serving base station further determines whether to perform handover according to the neighboring base station distribution map and the threshold value of the handover decision by using the handover decision unit, and can more accurately determine whether handover is needed, thereby avoiding the UE in the complex topology. Unnecessary switching in the network, thereby reducing unnecessary signaling load and increasing system throughput.

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Abstract

本发明提供一种无线通信***中的用户设备切换方法、用户设备及基站，方法包括：获取用户设备的位置信息及所述用户设备的服务基站的邻基站分布图；根据所述用户设备的电信号测量结果、所述用户设备的位置信息及所述用户设备的服务基站的邻基站分布图，决定所述用户设备是否发生切换。减少了UE在复杂拓扑结构的网络中的不必要的切换。

Description

无线通信***中的用户设备切换方法、 用户设备及基站 本申请要求于 2011 年 12 月 20 日提交中国专利局、 申请号为 201110430122.0、 发明名称为"无线通信***中的用户设备切换方法、 用户设 备及基站"的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术，尤其涉及一种无线通信***中的用户设备切换 方法、 用户设备及基站。
背景技术
目前， UE ( User Equipment, 用户设备） 的切换基于电信号的测量结果， 比如根据 RSRP ( Reference Signal Receiving Power,参考信号接收功率）/RSRQ ( Reference Signal Receiving Quality, 参考信号接收质量） 的测量上报结果来 判决切换。
但是， 随着网络技术的迅速发展， 无线网络也将越来越复杂， 例如微微基 站（pico ), 家庭基站（femto )等小功率节点的引入， 使得原本的同构网络变 成了异构网络。
由于现有技术中 UE是否进行切换， 仅依据电信号的测量结果进行判断， 当一个 UE在异构网络中移动， 如 UE—直在小区边缘移动， 那么切换数量将 会大大增加。 然而， 实际上由于地理位置的限制， UE不可能移动到邻小区， 导致发生不必要的切换，增加了 UE在复杂拓朴结构的网络中的不必要的切换 数量， 从而增加了不必要的信令负荷， 导致***的频谱效率降低。
发明内容
本发明实施例提供一种无线通信***中的用户设备切换方法、用户设备及 基站， 用于减少用户设备不必要的切换。 本发明实施例提供了一种无线通信***中的用户设备切换方法， 包括： 获取用户设备的位置信息及所述用户设备的服务基站的邻基站分布图； 根据所述用户设备的电信号测量结果、所述用户设备的位置信息及所述用 户设备的服务基站的邻基站分布图， 决定所述用户设备是否发生切换。
本发明实施例还提供了一种无线通信***中的用户设备， 包括： 切换判决单元， 用于根据用户设备的电信号测量结果、所述用户设备的位 置信息及所述用户设备的服务基站的邻基站分布图，决定所述用户设备是否发 生切换。
本发明实施例还提供了一种基站， 包括：
地理信息获取单元，用于获取所述用户设备的位置信息及所述用户设备的 服务基站的邻基站分布图；
切换判决单元， 用于根据所述用户设备的电信号测量结果、所述用户设备 的位置信息及所述用户设备的服务基站的邻基站分布图，决定所述用户设备是 否发生切换。
本发明实施例提供的无线通信***中的用户设备切换方法、用户设备及基 站， 通过进一步根据 UE的服务基站的邻基站分布图决定 UE是否发生切换， 使得当 UE所在的位置与某一邻基站直线距离虽然较短，但是根据邻基站分布 图显示的实际街道或道路分布，持有 UE的用户不可能进入该邻基站的小区内 的情况下， 保证 UE不会发生切换， 减少了 UE在复杂拓朴结构的网络中的不 必要的切换。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作一简单地介绍， 显而易见地， 下面描 述中的附图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 为本发明实施例提供的一种无线通信***中的用户设备切换方法的 流程图；
图 2 为本发明实施例提供的又一种无线通信***中的用户设备切换方法 的信令流程图；
图 3为本发明实施例提供的无线通信***中的用户设备的结构示意图； 图 4为本发明实施例提供的基站的结构示意图。
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。
本发明实施例提供的无线通信***中的用户设备切换方法包括： 获取 UE 的位置信息及所述 UE的服务基站的邻基站分布图；根据 UE的电信号测量结果、 所述 UE的位置信息及 UE的服务基站的邻基站分布图，决定 UE是否发生切换。
如， UE根据 UE的电信号测量结果、 所述 UE的位置信息及 UE的服务基站 的邻基站分布图， 决定 UE是否发生切换。 其中， UE的位置信息如 UE的坐标 等可通过 GPS ( Globa l Pos i t ioning Sys tem, 全球定位***） 定位获得， 邻 基站分布图如电子地图、 坐标分布等可由 UE 的服务基站通过 GI S ( g loba l informa t ion sys tem, 地理信息***)获得。
可选地， UE决定是否发生切换之前， 该 UE接收服务基站发送的邻基站分 布图。
或者如， 服务基站根据 UE的电信号测量结果、 所述用户设备的位置信息 及 UE的服务基站的邻基站分布图， 决定 UE是否发生切换。
可选地，服务基站决定 UE是否发生切换之前，服务基站接收 UE发送的测 量报告， 测量报告包括电信号测量结果及 UE的位置信息。
其中，邻基站分布图可为所述服务基站的各个邻基站的坐标分布。 坐标分 布可以有街道、 道路信息等。
当上述步骤由 UE执行时， UE决定发生切换后， 向所述服务基站发送切换 请求， 以告知服务基站进行切换。
本实施例中，通过进一步根据 UE的服务基站的邻基站分布图决定 UE是否 发生切换， 使得当 UE所在的位置与某一邻基站直线距离虽然较短， 但是根据 邻基站分布图显示的实际街道或道路分布， 持有 UE的用户不可能进入该邻基 站的小区内的情况下，保证 UE不会发生切换，避免了 UE在复杂拓朴结构的网 络中的不必要的切换， 从而减少了不必要的信令负荷， 增加了***吞吐量。
图 1 为本发明实施例提供的一种无线通信***中的用户设备切换方法的 信令流程图。 本实施例中， 假设一个移动的 UE 正在跟服务基站如服务 eNB ( evolved Node B, 演进型基站）通信， 该 UE具有定位功能， 如 GPS功能， 能通过该定位功能对自己进行定位。 如图 1所示， 包括：
步骤 11、 服务 eNB发送邻基站分布图给 UE。
邻基站分布图类似车载的电子地图， 标识有各个邻基站的分布， 或者可进 一步包含街道信息， 河流、 建筑信息等。 邻基站分布图也可以是一个包含有服 务基站的各个邻基站的坐标的分布图。
服务基站存储或向 UE发送邻基站分布图的格式可以通过如下两种方式， 一种是以消息的格式， 例如坐标来标识基站， 用角度来标识各个街道或河流的 走向和流向发送给 UE; 另一种是直接以图像的方式发送给 UE。
如服务 eNB通过测量配置 （measurement conf igura t ion ) 消息携带部基 站分布图及切换判决的阔值 "d- thresho ld" , 发送给 UE。 其中， d_ threshold 用来指示 UE 发生切换所必须具备的条件： UE 到目标基站的距离为 d_ thresho ld。
步骤 12、 UE通过分析邻基站分布图中各个邻基站的位置信息， 以及通过 GPS获得的自己的位置， 以及根据自身的电信号强度， 决定是否发生切换， 例 如切换准则为： UE到目标基站的距离 d_ thresho ld , 这个条件可以作为原先 用电信号作为切换判决的一个补充。
具体地， 决定是否发生切换可以通过以下方式实现：
UE根据测量的电信号信息（例如 RSRP或 RSRQ ) ,对各个邻小区进行排序， 选择电信号强度较高的小区如小区 A、 小区 B作为目标小区集合， 然后根据邻 基站分布图 （例如分布图中包含部区的坐标位置， 以及街道信息）， 筛选出最 合适的小区作为目标小区。 例如， 小区 A的 RSRP信号强度最高， 但是 UE到该 小区的距离却相对比较远， 并且， 基于邻基站分布图上的街道信息（例如街道 的走向） ， UE将不会移动到小区 A去。 所以， UE选择目标小区集合中的其他 小区如小区 B做为目标小区。 从而避免了不必要的切换。
或者， 决定是否发生切换可以通过以下方式来实现：
UE根据邻基站分布图 （例如分布图中包含邻区的坐标位置， 以及街道信 息） ， 选择距离 UE距离较近的小区并且在街道走向上的小区做为目标小区集 合即备选集合， 然后 UE 在以上的备选集合中， 再根据测量的 RSRP或 RSRQ选 择信号强度或信号质量较好的小区， 来避免不必要的切换。
本领域技术人员应理解，基于上述邻基站分布图、用户设备的位置信息等 信息来决定上述用户设备是否发生切换不限于此，还有其他的实现方式， 这里 不再赘述。
如果需要切换，则执行切换流程，例如下面举例说明的步骤 1 3至步骤 16 ; 否则， 结束该流程， 不发生切换。
步骤 1 3、 UE 发送切换请求消息给服务 eNB。 "切换请求" 消息用来告知服务 eNB , UE意图进行切换。
步骤 14、 服务 eNB发送切换请求（HO reque s t ) 消息给目标 eNB;
步骤 15、 目标 eNB回复切换请求应答（ HO reque s t ACK )消息给服务 eNB。 步骤 16、 服务 eNB发送切换命令 ( HO Command )给 UE , UE完成切换。 本实施例中， UE通过进一步依据服务 eNB发送的邻基站的分布图及切换 判决的阔值， 来决定是否进行切换， 避免了 UE在复杂拓朴结构的网络中的不 必要的切换， 从而减少了不必要的信令负荷， 增加了***吞吐量。
图 2 为本发明实施例提供的又一种无线通信***中的用户设备切换方法 的信令流程图。 本实施例中， 假设一个移动的 UE正在跟服务 eNB通信， 该 UE 具有 GPS功能， 能通过该定位功能对自己进行定位。 如图 2所示， 包括：
步骤 21、 UE发送测量 ^艮告 (其中包括 UE的坐标信息及 UE测量的电信号 ) 给服务 eNB;
UE 可以在发送给服务 eNB的 "测量报告（Mea surement Repor t ) " 消息 里增加 UE 的位置信息。 服务 eNB可以将此测量报告作为判断 UE是否发生切 换的标准之一。
步骤 22、 服务 eNB根据 UE发送的测量报告， 以及邻基站分布图， 来决定 UE是否发生切换。
如果决定 UE发生切换， 则执行步骤 2 3 ; 否则， 结束该流程， 不发生切换。 步骤 23、 服务 eNB发送切换请求（HO reque s t )给目标 eNB;
步骤 24、 目标 eNB回复切换请求响应 （ HO reque s t ACK )给服务 eNB; 步骤 25、 服务 eNB发送切换命令 ( HO Command )给 UE , UE完成切换。 本实施例中， 服务 eNB通过进一步依据邻基站分布图及切换判决的阔值， 来决定是否进行切换， 能更准确地判断是否需要切换， 避免了 UE在复杂拓朴 结构的网络中的不必要的切换，从而减少了不必要的信令负荷， 增加了***吞 吐量。 本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存 储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储 介质包括： R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
图 3为本发明实施例提供的无线通信***中的用户设备的结构示意图。如 图 3所示， UE用于实现上述图 1所示实施例的方法， 包括： 地理信息获取单 元 31及切换判决单元 32。本领域技术人员应理解为： UE还包括通常所具有的 移动信号收发单元及用来获取自身位置信息的定位单元如 GPS 单元等功能模 块， 不属于本发明的重点， 因此本文中不赘述。
地理信息获取单元 31用于获取所述用户设备的位置信息及所述用户设备 的服务基站的邻基站分布图。 如地理信息获取单元 31可包括定位单元， 用来 获取自身的位置信息。 地理信息获取单元 31可通过接收服务基站发送的消息 来获得邻基站分布图及阔值。切换判决单元 32用于根据 UE的电信号测量结果、 UE的位置信息及 UE的服务基站的邻基站分布图， 决定 UE是否发生切换。 其 中， 邻基站分布图为服务基站的各个邻基站的坐标分布。
本发明实施例提供的 UE还可包括： 切换请求单元 33 , 用于向服务基站发 送切换请求。
本实施例中， UE通过切换判决单元进一步依据服务 eNB发送的邻基站的 分布图及切换判决的阔值， 来决定是否进行切换， 避免了 UE在复杂拓朴结构 的网络中的不必要的切换，从而减少了不必要的信令负荷，增加了***吞吐量。
可选地， 本发明实施例提供的 UE还可包括报告单元， 用于向服务基站发 送测量报告， 所述测量报告包括电信号测量结果及所述用户设备的位置信息。 使得 UE既适用于图 1所示实施例的方法， 又适用于图 2所示实施例的方法。
图 4为本发明实施例提供的基站的结构示意图。 如图 4所示， 基站作为 UE的服务基站， 用于实现上述图 2所示实施例中的方法， 包括： 位置信息获 取单元 41及切换判决单元 42。 本领域技术人员应理解为： 基站还包括通常所 具有的移动信号收发单元、射频处理单元、基带处理单元及用来获取邻区基站 分布图的 GIS单元等功能模块， 不属于本发明的重点， 因此本文中不赘述。
位置信息获取单元 41用于获取用户设备的位置信息及所述用户设备的服 务基站的邻基站分布图。 如位置信息获取单元 41可具体用于接收所述用户设 备发送的测量报告，所述测量报告包括电信号测量结果及所述用户设备的位置 信息。 位置信息获取单元 41还可包括 GIS单元来获取邻区基站分布图。 切换 判决单元 42用于根据 UE的电信号测量结果、 UE的位置信息及 UE的服务基站 的邻基站分布图， 决定 UE是否发生切换。
本实施例中，作为服务基站的基站通过切换判决单元进一步依据邻基站分 布图及切换判决的阔值，来决定是否进行切换，能更准确地判断是否需要切换， 避免了 UE在复杂拓朴结构的网络中的不必要的切换， 从而减少了不必要的信 令负荷， 增加了***吞吐量。
最后应说明的是： 以上实施例仅用以说明本发明的技术方案， 而非对其限 制； 尽管参照前述实施例对本发明进行了详细的说明， 本领域的普通技术人员 应当理解： 其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其 中部分技术特征进行等同替换； 而这些修改或者替换， 并不使相应技术方案的 本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求
1、 一种无线通信***中的用户设备切换方法， 其特征在于， 包括： 获取用户设备的位置信息及所述用户设备的服务基站的邻基站分布图； 根据所述用户设备的电信号测量结果、所述用户设备的位置信息及所述用 户设备的服务基站的邻基站分布图， 决定所述用户设备是否发生切换。
2、 根据权利要求 1所述的用户设备切换方法， 其特征在于， 根据用户设 备的电信号测量结果、所述用户设备的位置信息及所述用户设备的服务基站的 邻基站分布图， 决定所述用户设备是否发生切换， 包括：
所述用户设备根据用户设备的电信号测量结果、所述用户设备的位置信息 及所述用户设备的服务基站的邻基站分布图， 决定所述用户设备是否发生切 换。
3、 根据权利要求 2所述的用户设备切换方法， 其特征在于， 根据用户设 备的电信号测量结果、所述用户设备的位置信息及所述用户设备的服务基站的 邻基站分布图， 决定所述用户设备是否发生切换之前， 所述方法还包括： 所述用户设备接收所述服务基站发送的所述邻基站分布图及所述阔值。
4、 根据权利要求 2所述的用户设备切换方法， 其特征在于， 当决定所述 用户设备发生切换时， 所述用户设备向所述服务基站发送切换请求。
5、 根据权利要求 1所述的用户设备切换方法， 其特征在于， 根据用户设 备的电信号测量结果、所述用户设备的位置信息及所述用户设备的服务基站的 邻基站分布图， 决定所述用户设备是否发生切换， 包括：
所述服务基站根据用户设备的电信号测量结果、所述用户设备的位置信息 及所述用户设备的服务基站的邻基站分布图， 决定所述用户设备是否发生切 换。
6、 根据权利要求 5所述的用户设备切换方法， 其特征在于， 根据用户设 备的电信号测量结果、所述用户设备的位置信息及所述用户设备的服务基站的 邻基站分布图， 决定所述用户设备是否发生切换之前， 所述服务基站接收所述 用户设备发送的测量报告，所述测量报告包括电信号测量结果及所述用户设备 的位置信息。
7、 根据权利要求 1-6任一项所述的用户设备切换方法， 其特征在于， 所 述邻基站分布图包括所述服务基站的各个邻基站的坐标分布。
8、 一种无线通信***中的用户设备， 其特征在于， 包括：
地理信息获取单元，用于获取所述用户设备的位置信息及所述用户设备的 服务基站的邻基站分布图；
切换判决单元， 用于根据所述用户设备的电信号测量结果、所述用户设备 的位置信息及所述用户设备的服务基站的邻基站分布图，决定所述用户设备是 否发生切换。
9、 根据权利要求 8所述的用户设备， 其特征在于， 所述地理信息获取单 元具体用于接收所述服务基站发送的所述邻基站分布图及所述阔值。
10、 根据权利要求 8或 9所述的用户设备， 其特征在于， 还包括： 切换请求单元， 用于向所述服务基站发送切换请求。
11、 根据权利要求 8或 9所述的用户设备， 其特征在于， 还包括： 报告单元， 用于向服务基站发送测量报告， 所述测量报告包括电信号测量 结果及所述用户设备的位置信息。
12、 一种基站， 其特征在于， 包括：
位置信息获取单元，用于获取用户设备的位置信息及所述用户设备的服务 基站的邻基站分布图；
切换判决单元， 用于根据用户设备的电信号测量结果、所述用户设备的位 置信息及所述用户设备的服务基站的邻基站分布图，决定所述用户设备是否发 生切换。
13、 根据权利要求 12所述的基站， 其特征在于， 所述位置信息获取单元 具体用于接收所述用户设备发送的测量报告，所述测量报告包括电信号测量结 果及所述用户设备的位置信息。
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