WO2012119475A1 - 一种终端切换的方法及装置 - Google Patents
一种终端切换的方法及装置 Download PDFInfo
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- WO2012119475A1 WO2012119475A1 PCT/CN2011/084667 CN2011084667W WO2012119475A1 WO 2012119475 A1 WO2012119475 A1 WO 2012119475A1 CN 2011084667 W CN2011084667 W CN 2011084667W WO 2012119475 A1 WO2012119475 A1 WO 2012119475A1
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- terminal
- access device
- wireless access
- handover
- threshold
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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
Definitions
- the present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for terminal handover in a wireless access system. Background technique
- the mobile data services mainly occur in indoor and hotspot environments, which are reflected in nomadic/local wireless access scenarios.
- the characteristics of the indoor and hotspot data services are that the users usually have fixed or very low-speed mobility, and the mobility requirements are not high.
- the data services are mainly IP-based Internet Internet services, and the requirements for quality of service (QoS) are relatively simple, and Far less than the QoS requirements of carrier-class services.
- QoS quality of service
- the traditional cellular mobile communication system is mainly designed for high-speed mobile, seamless switching carrier-class service design. When it carries large-flow and low-speed IP data packet services, the efficiency is low and the cost is too high. How to meet the huge demand for indoor data services in the future has become a major challenge for cellular mobile communication systems. Cellular mobile operators are eager to find low-cost, high-throughput solutions for nomadic/local wireless data access.
- LTE Long Term Evolution
- the main purpose of the present invention is to provide a terminal handover method and device for a nomadic/local wireless access scenario, which is used to solve the complexity and efficiency of the existing handover method in a nomadic/local wireless data access scenario. Low, technical problem that cannot be initiated by the terminal.
- a method for terminal handover comprising:
- the terminal determines, according to the measurement threshold, whether the signal quality of the neighboring wireless access device needs to be measured. When the signal quality of the serving cell is less than the measurement threshold, the signal quality of the neighboring wireless access device is measured.
- the terminal determines whether the handover needs to be performed according to the handover threshold. When the signal quality of the neighboring radio access device is greater than the handover threshold, the terminal initiates a handover procedure to the neighboring radio access device.
- the method further includes:
- the radio access device to which the serving cell belongs sends the measurement threshold and the handover threshold to the terminal, where the terminal receives and saves the measurement threshold and the handover threshold; or the measurement
- the threshold and the switching threshold are the measurement thresholds and switching thresholds set by the terminal by default.
- the wireless access device sends the measurement threshold and the switching threshold to all terminals in the service range by using a system broadcast manner, or sends the measurement threshold and the handover threshold to the terminal through dedicated signaling according to the capability of the terminal.
- the method further includes:
- the terminal obtains information of a neighboring wireless access device by scanning, and performs signal quality measurement on the scanned neighboring wireless access device;
- the terminal sends, by the wireless access device to which the serving cell belongs, the neighboring wireless access device to the terminal Information, the terminal performs signal quality measurement on the neighboring wireless access device according to the received information of the neighboring wireless access device;
- the terminal determines, according to the measurement result of the neighboring wireless access device, whether the signal quality of the neighboring wireless access device is greater than the handover threshold, and if greater, the neighboring wireless access device whose signal quality is greater than the handover threshold Select one as the target wireless access device, otherwise do not make a choice.
- the wireless access device sends the information of the neighboring wireless access device to all terminals in the service range by means of system broadcast, or the adjacent wireless by using proprietary signaling according to the capability of the terminal.
- the information of the access device is sent to the terminal.
- the method for the terminal to initiate a handover procedure to a neighboring wireless access device is: the terminal initiates a process of leaving the current serving cell, and releases the related context;
- the terminal initiates an access process and accesses the neighboring wireless access device.
- the present invention further provides a device for terminal handover, including a terminal and a wireless access device, where the terminal includes a measurement module, an acquisition module, a handover determination module, and a handover module;
- a measurement module configured to measure a signal quality of the serving cell, and determine whether a signal quality of the serving cell is less than a measurement threshold, and when a signal quality of the serving cell is less than a measurement threshold, measure a signal quality of the neighboring wireless access device;
- An acquiring module configured to acquire a measurement threshold, a switching threshold, and/or a message switching judging module of a neighboring radio access device, where the signal quality of the serving cell is less than a measurement threshold, according to a signal quality of the neighboring radio access device
- the measurement result determines whether the signal quality of the neighboring wireless access device is greater than a handover threshold
- the switching module is configured to initiate a handover process to the neighboring wireless access device when the signal quality of the neighboring wireless access device is greater than the handover threshold.
- the wireless access device includes:
- a sending module configured to send a measurement threshold and a handover threshold to the terminal when the terminal accesses the serving cell, and/or send information about the neighboring wireless access device
- the access module is configured to respond to the handover process initiated by the terminal, perform terminal context release, and complete an access procedure of the terminal to the target wireless access device.
- the measurement threshold and the handover threshold acquired by the acquiring module are sent by the serving cell to the acquiring module, or the obtaining module obtains a default value locally.
- the terminal is always in the connected state, and the signal quality of the serving cell is measured by the measurement threshold configured by itself or the network. If the signal quality of the serving cell is lower than the measurement threshold, it is determined according to the information of the neighboring wireless access device.
- the handover is required. If the target cell signal quality is higher than the handover threshold, the terminal actively accesses the target cell and releases the context of the source cell.
- the invention improves the handover process of the terminal, makes the state change of the terminal simpler, reduces the implementation cost of the wireless access device, and better satisfies the requirements of the nomadic/local wireless data access scenario.
- Figure 1 is a network topology diagram of a wireless access system
- FIG. 2 is a flowchart of performing, by a terminal according to a measurement threshold and a handover threshold sent by a radio access device, that is, a measurement threshold and a handover threshold, according to Embodiment 1 of the present invention
- FIG. 3 is a flowchart of a method in which a terminal performs measurement according to a default measurement threshold and a handover threshold and initiates handover according to Embodiment 2 of the present invention
- FIG. 4 is a flowchart of a process for initiating measurement and handover after a terminal fails to discover a link with a wireless access device according to Embodiment 3 of the present invention. detailed description
- This embodiment is a process in which the terminal performs measurement and initiates handover according to the measurement threshold and the handover threshold sent by the radio access device, that is, the base station.
- Step 201 The terminal A enters the service area of the wireless access device A, initiates an access request, and accesses the wireless access device A. After the terminal A completes the access, the wireless access device A sends the measurement threshold and the switching threshold. Terminal A;
- the wireless access device may send the measurement threshold and the handover threshold to all terminals in the service range by means of system broadcast, or may send the measurement threshold and the handover threshold to the terminal through dedicated signaling according to the capability of the terminal.
- Step 202 After receiving the measurement threshold and the switching threshold sent by the wireless access device A, the terminal A saves it locally.
- Step 203 The terminal A moves to the coverage edge of the wireless access device A in the service area of the wireless access device A.
- the terminal A detects that the signal quality of the wireless access device A is less than the measurement threshold, the terminal A initiates Scanning the wireless access device in the neighboring area to detect whether there is a neighboring wireless access device by scanning, and if so, measuring the signal quality of the neighboring wireless access device;
- Step 204 If the terminal A scans that there is a neighboring wireless access device, if the terminal A scans to the wireless access device B, it is determined whether the measured signal quality of the neighboring wireless access device B is greater than a handover threshold. If the threshold is greater than the handover threshold, the terminal uses the neighboring wireless access device B as the target wireless access device and initiates the handover. If terminal A simultaneously measures that the signal quality of multiple adjacent wireless access devices is greater than the handover threshold, the terminal selects a most suitable neighboring wireless access device as the target wireless access device and initiates handover.
- Step 205 In the handover process, the terminal A first initiates a process of leaving the wireless access device A, and the wireless access device A and the core network element connected to the wireless access device A are related to the terminal A. The context information is released, and then terminal A initiates an access procedure and accesses to the wireless access device B.
- Example 2
- This embodiment is a process in which the terminal performs measurement according to a default measurement threshold and a handover threshold and initiates a handover. The following describes the process in conjunction with FIG. 3:
- Step 301 The terminal A enters the service area of the wireless access device A, and initiates access to the wireless access device A.
- the wireless access device A optionally sends the information of the neighboring wireless access device.
- the wireless access device may be sent by means of system broadcast, or the information of the neighboring wireless access device may be sent to the terminal by using dedicated signaling; the information of the adjacent wireless access device includes at least wireless access Information such as device identification, access parameters (such as frequency points of adjacent cells, bandwidth, etc.).
- Step S302 If the terminal A receives the information of the neighboring wireless access device sent by the wireless access device A, it saves it locally.
- Step S303 The terminal A moves to the coverage edge of the wireless access device A in the service area of the wireless access device A.
- the terminal A detects that the signal quality of the wireless access device A is smaller than the measurement threshold set by the terminal A by default, the terminal A may initiate measurement of the neighboring area wireless access device according to the saved information of the neighboring wireless access device.
- Step S304 If the information of the neighboring wireless access device of the terminal A includes the wireless access device B, determine whether the measured signal quality of the neighboring wireless access device B is greater than a handover threshold. If the threshold is greater than the handover threshold, the terminal A The neighboring wireless access device B acts as the target wireless access device and initiates a handover. If terminal A simultaneously measures that the signal quality of multiple neighboring wireless access devices is greater than the handover threshold, the terminal selects a most suitable neighboring wireless access device as the target wireless access device and initiates handover.
- Step S305 In the handover process, the terminal A first initiates a process of leaving the wireless access device A, and the wireless access device A and the core network element connected to the wireless access device A delete the context information related to the terminal A, and then the terminal A initiates an access procedure and accesses to the wireless access device B.
- Example 3
- This embodiment is a processing flowchart for initiating measurement and handover after the terminal discovers that the link fails with the wireless access device, and the specific steps are described in detail in conjunction with FIG. 4;
- Step 401 The terminal A enters the service area of the wireless access device A, and initiates access to the wireless access device A. After the terminal A completes the access, the wireless access device sends the measurement threshold and the switching threshold to the terminal and/or the sending phase. The information of the neighboring wireless access device is sent to the terminal A.
- the wireless access device may send the measurement threshold, the switching threshold, and/or the information of the neighboring wireless access device to all terminals in the service range by means of system broadcast, or according to The capability of the terminal transmits the measurement threshold and the handover threshold and/or information of the neighboring wireless access device to the terminal through dedicated signaling.
- Step 402 After receiving the measurement threshold and the handover threshold sent by the wireless access device A and/or the information of the neighboring wireless access device, the terminal A saves the information locally;
- Step 403 The terminal A detects that the link with the radio access device A fails when the radio accesses the service area of the device A, and the terminal A initiates scanning of the neighboring cell radio access device.
- Step 404 If the terminal A scans to the wireless access device B at this time, it is determined whether the measured signal quality of the neighboring wireless access device B is greater than the received switching threshold or the default switching threshold set by the terminal A, if greater than When the threshold is switched, the terminal uses the neighboring wireless access device B as the target wireless access device and initiates the handover. If terminal A simultaneously measures that the signal quality of multiple adjacent wireless access devices is greater than the handover threshold, the terminal selects a most suitable neighboring wireless access device as the target wireless access device and initiates handover.
- Step 405 Here, terminal A directly initiates access to the wireless access device B during the handover process.
- the context associated with terminal A that remains in radio access device A can be handled by the wireless radio access device itself.
- This embodiment provides a device for terminal handover based on the foregoing embodiment, and the device 500 includes: a measurement module 501, an acquisition module 502, a handover determination module 503, a handover module 504, and a transmission module 510 and an access module 511 located in the wireless access device;
- the measuring module 501 is configured to measure the signal quality of the server cell, and determine whether the signal quality of the serving cell is smaller than the measurement threshold, and when the signal quality of the serving cell is less than the measurement threshold, measure the neighboring wireless access device;
- the obtaining module 502 is configured to obtain the measurement threshold, the handover threshold, and/or the information of the neighboring wireless access device.
- the measurement threshold and the handover threshold are obtained by the acquiring module 502 when the terminal accesses the serving cell, or The acquiring module 502 obtains the measurement threshold and the switching threshold set by the terminal from the local.
- the handover determining module 503 is configured to determine, according to the measurement result of the signal quality of the neighboring wireless access device, whether the signal quality of the neighboring wireless access device is greater than a handover threshold, when the signal quality of the serving cell is less than the measurement threshold;
- the switching module 504 is configured to initiate a handover procedure to the neighboring wireless access device when the signal quality of the neighboring wireless access device is greater than the handover threshold.
- the sending module 510 is configured to send a measurement threshold and a handover threshold to the terminal when the terminal accesses the serving cell, and/or send information about the neighboring wireless access device;
- the access module 511 is configured to respond to the handover process initiated by the terminal, perform the release of the source wireless access device, and complete the access process of the terminal to the local end.
- the modules included in the device are all configured to implement the steps in the foregoing method embodiments, and the functions thereof can be directly derived from the foregoing method embodiments, and any The functional modules or the execution units that are abstracted, extracted, or deduced in the method embodiments should be within the protection scope of the device embodiments of the present invention. To save space, no further details are provided herein.
- the invention improves the handover process of the terminal, makes the state change of the terminal simpler, reduces the implementation cost of the wireless access device, and better satisfies the requirements of the nomadic/local wireless data access scenario.
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Abstract
本发明公开了一种针对游牧/本地无线接入场景的终端切换方法及装置，用于解决游牧/本地无线数据接入场景下，现有切换方法实现过程复杂、效率低的，无法由终端发起切换的技术问题。技术方案为：终端一直处于连接态，通过自身或网络配置的测量门限对服务小区的信号质量进行测量，如果服务小区的信号质量低于测量门限，则根据相邻无线接入设备的信息判断是否需要进行切换，如果目标小区信号质量高出切换门限，则终端主动在目标小区进行接入，同时释放源小区的上下文。本发明改进了终端的切换流程，使得终端状态变化更为简单，降低了无线接入设备的实现成本，从而更好的满足游牧/本地无线数据接入场景的需求。
Description
一种终端切换的方法及装置 技术领域
本发明涉及无线通信技术领域， 尤其涉及一种无线接入系统中的终端 切换的方法及装置。 背景技术
随着 3G网络的大规模部署， 移动互联网数据业务快速增长。 移动互联 网的发展带动了智能终端的增长， 智能终端的增长又进一步刺激了移动互 联网的需求。 最新的预测显示， 移动数据业务量将在未来十年内保持持续 高速增长。 运营商网络中数据业务比例逐渐增加， 影响了传统电信级业务。
此外大部分的移动数据业务主要发生在室内和热点环境， 体现为游牧 / 本地无线接入场景。 室内和热点数据业务特征为用户通常为固定或者非常 低速移动， 对移动性要求不高； 另一方面， 数据业务主要为基于 IP的互联 网 Internet业务， 对服务质量（QoS ) 的要求比较单一， 且远低于电信级业 务对 QoS的要求。 传统的蜂窝移动通信系统主要面向的是高速移动， 无缝 切换的电信级业务设计， 当其承载大流量低速 IP数据包业务时，效率偏低， 成本过高。 如何满足未来巨大的室内数据业务需求已成为蜂窝移动通信系 统面临的重大挑战。 蜂窝移动运营商迫切找出低成本， 高吞吐量， 适合游 牧 /本地无线数据接入的解决方案。
为了更好的满足用户对无线连接带宽的需求， 3GPP 长期演进 (LTE)项 目是近几年来 3GPP启动的最大的新技术研发项目。作为现有无线标准的演 进技术， LTE 不仅可以提供更高的数据速率和容量、 更大的覆盖范围， 还 可以降低业务的延迟以及系统的运营成本， 有利于运营商推出更多实时性、 高速率业务， 从而吸引更多的高端用户。 但是 LTE依然是针对高速移动，
无缝切换的电信级业务设计， 其协议栈相对复杂， 成本较高， 缺少针对游 牧 /本地无线数据接入的优化处理。 发明内容
有鉴于此， 本发明的主要目的在于提供一种针对游牧 /本地无线接入场 景的终端切换方法及装置， 用于解决游牧 /本地无线数据接入场景下， 现有 切换方法实现过程复杂、 效率低的， 无法由终端发起切换的技术问题。
为达到上述目的， 本发明的技术方案是这样实现的：
一种终端切换的方法， 该方法包括：
终端依据测量门限判断是否需要对相邻无线接入设备的信号质量进行 测量， 当服务小区的信号质量小于测量门限时， 对相邻无线接入设备的信 号质量进行测量；
所述终端依据切换门限判断是否需要执行切换， 当相邻无线接入设备 的信号质量大于切换门限， 所述终端向相邻无线接入设备发起切换流程。
进一步地， 所述方法还包括：
当所述终端接入服务小区时， 由服务小区所属的无线接入设备向所述 终端发送所述测量门限及切换门限， 所述终端接收并保存所述测量门限及 切换门限； 或所述测量门限及切换门限为所述终端默认设置的测量门限和 切换门限。
进一步地， 所述无线接入设备采用系统广播的方式将测量门限以及切 换门限发送给服务范围内的所有终端， 或根据终端的能力将测量门限以及 切换门限通过专有信令发送给终端。
进一步地， 所述终端执行切换判断之前还包括：
所述终端通过扫描获得相邻无线接入设备的信息， 并对扫描到的相邻 无线接入设备进行信号质量测量； 或
由服务小区所属的无线接入设备向所述终端发送相邻无线接入设备的
信息， 所述终端根据接收到的相邻无线接入设备的信息对所述相邻无线接 入设备进行信号质量测量；
所述终端根据对相邻无线接入设备的测量结果判断相邻无线接入设备 的信号质量是否大于所述切换门限， 若大于， 则从信号质量大于所述切换 门限的相邻无线接入设备中选择一个作为目标无线接入设备， 否则不做选 择。
进一步地， 所述无线接入设备采用系统广播的方式将所述相邻无线接 入设备的信息发送给服务范围内的所有终端， 或根据终端的能力通过专有 信令将所述相邻无线接入设备的信息发送给终端。
进一步地， 所述终端向相邻无线接入设备发起切换流程的方法为： 所述终端发起离开当前服务小区的流程， 释放相关上下文；
所述终端发起接入过程， 接入到所述相邻无线接入设备。
基于本发明实施例， 本发明还提出一种终端切换的装置， 包括终端及 无线接入设备， 所述终端包括测量模块、 获取模块、 切换判断模块和切换 模块；
测量模块， 用于对服务小区的信号质量进行测量， 并判断服务小区的 信号质量是否小于测量门限， 当服务小区的信号质量小于测量门限时， 对 相邻无线接入设备的信号质量进行测量；
获取模块， 用于获取测量门限、 切换门限和 /或相邻无线接入设备的信 切换判断模块， 用于在服务小区的信号质量小于测量门限时， 根据对 相邻无线接入设备信号质量的测量结果判断相邻无线接入设备的信号质量 是否大于切换门限；
切换模块， 用于在相邻无线接入设备的信号质量大于切换门限时， 向 相邻无线接入设备发起切换流程。
进一步地， 所述无线接入设备包括：
发送模块， 用于在终端接入服务小区时向终端发送测量门限及切换门 限， 和 /或发送相邻无线接入设备的信息；
接入模块， 用于响应终端发起的切换流程， 执行终端上下文释放， 及 完成所述终端到该目标无线接入设备的接入流程。
进一步地， 所述获取模块获取的测量门限及切换门限由服务小区发送 给所述获取模块， 或由所述获取模块从本地获取默认值。
本发明中， 终端一直处于连接态， 通过自身或网络配置的测量门限对 服务小区的信号质量进行测量， 如果服务小区的信号质量低于测量门限， 则根据相邻无线接入设备的信息判断是否需要进行切换， 如果目标小区信 号质量高出切换门限， 则终端主动在目标小区进行接入， 同时释放源小区 的上下文。 本发明改进了终端的切换流程， 使得终端状态变化更为简单， 降低了无线接入设备的实现成本， 从而更好的满足游牧 /本地无线数据接入 场景的需求。 附图说明
图 1为无线接入系统网络拓朴图；
图 2为本发明实施例 1终端根据无线接入设备即基站发送的测量门限 及切换门限执行测量并发起切换的流程；
图 3为本发明实施例 2终端根据默认的测量门限及切换门限执行测量 并发起切换的流程；
图 4为本发明实施例 3终端发现与无线接入设备之间链路失败后发起 测量和切换的处理流程图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施例并
参照附图， 对本发明进一步详细说明。
实施例 1 :
该实施例为终端根据无线接入设备即基站发送的测量门限及切换门限 执行测量并发起切换的流程， 以下结合图 2对该流程进行描述：
步驟 201、 终端 A进入了无线接入设备 A的服务区域， 发起接入请求， 并接入到无线接入设备 A, 终端 A完成接入后， 无线接入设备 A发送测量 门限以及切换门限给终端 A;
无线接入设备可采用系统广播的方式将测量门限以及切换门限发送给 服务范围内的所有终端， 也可根据终端的能力将测量门限以及切换门限通 过专有信令发送给终端。
步驟 202、 终端 A接收到无线接入设备 A发送的测量门限及切换门限 后， 将其在本地保存；
步驟 203、 终端 A在无线接入设备 A的服务区域内移动到无线接入设 备 A的覆盖边缘， 当终端 A检测到无线接入设备 A的信号质量小于所述测 量门限时， 则终端 A发起对邻区无线接入设备的扫描， 通过扫描发现是否 有相邻无线接入设备存在， 若存在， 还需对相邻无线接入设备的信号质量 进行测量；
步驟 204、 如果终端 A扫描到有相邻的无线接入设备存在， 如终端 A 扫描到无线接入设备 B, 则判断测量到的相邻无线接入设备 B的信号质量 是否大于切换门限， 如果大于切换门限， 终端将相邻无线接入设备 B作为 目标无线接入设备， 并发起切换。 如果终端 A同时测量到多个相邻无线接 入设备的信号质量大于切换门限， 则终端选择一个最合适的相邻无线接入 设备作为目标无线接入设备， 并发起切换。
步驟 205、 终端 A在切换过程中， 首先发起离开无线接入设备 A的流 程，无线接入设备 A及与无线接入设备 A连接的核心网元将与终端 A相关
的上下文信息释放， 然后终端 A发起接入过程， 接入到无线接入设备 B。 实施例 2:
该实施例为终端根据默认的测量门限及切换门限执行测量并发起切换 的流程， 以下结合图 3对该流程进行描述：
步驟 301、 终端 A进入了无线接入设备 A的服务区域， 发起接入到无 线接入设备 A, 终端 1完成接入后， 无线接入设备 A可选地发送相邻无线 接入设备的信息给终端， 无线接入设备可采用系统广播的方式发送， 也可 通过专有信令将相邻无线接入设备的信息发送给终端； 所述相邻无线接入 设备的信息至少包含无线接入设备标识、 接入参数（例如相邻小区的频点、 带宽等）等信息。
步驟 S302、如果终端 A接收到无线接入设备 A发送的相邻无线接入设 备的信息， 将其在本地保存。
步驟 S303、终端 A在无线接入设备 A的服务区域内移动到无线接入设 备 A的覆盖边缘， 当终端 A检测到无线接入设备 A的信号质量小于终端 A 默认设置的测量门限时， 终端 A可根据保存的相邻无线接入设备的信息发 起对邻区无线接入设备的测量。
步驟 S304、 如果终端 A的相邻无线接入设备的信息包含无线接入设备 B,则判断测量到的相邻无线接入设备 B的信号质量是否大于切换门限，如 果大于切换门限， 终端 A将相邻无线接入设备 B作为目标无线接入设备， 并发起切换。 如果终端 A同时测量到多个相邻无线接入设备的信号质量大 于切换门限， 则终端选择一个最合适的相邻无线接入设备作为目标无线接 入设备， 并发起切换。
步驟 S305、终端 A在切换过程中， 首先发起离开无线接入设备 A的流 程，无线接入设备 A及与无线接入设备 A连接的核心网元将与终端 A相关 的上下文信息删除， 然后终端 A发起接入过程， 接入到无线接入设备 B。
实施例 3:
该实施例为终端发现与无线接入设备之间链路失败后发起测量和切换 的处理流程图， 具体步驟结合图 4进行详细说明；
步驟 401、 终端 A进入了无线接入设备 A的服务区域， 发起接入到无 线接入设备 A, 终端 A完成接入后， 无线接入设备发送测量门限以及切换 门限给终端和 /或发送相邻无线接入设备的信息给终端 A, 无线接入设备可 采用系统广播的方式将测量门限以及切换门限和 /或相邻无线接入设备的信 息发送给服务范围内的所有终端， 也可根据终端的能力将测量门限以及切 换门限和 /或相邻无线接入设备的信息通过专有信令发送给终端。
步驟 402、 终端 A接收到无线接入设备 A发送的测量门限及切换门限 和 /或相邻无线接入设备的信息后， 将其在本地保存；
步驟 403、 终端 A在无线接入设备 A的服务区域时检测到与无线接入 设备 A之间的链路失败， 则终端 A发起对邻区无线接入设备的扫描。
步驟 404、如果终端 A此时扫描到无线接入设备 B,则判断测量到的相 邻无线接入设备 B的信号质量是否大于接收到的切换门限或终端 A设置的 默认的切换门限， 如果大于切换门限， 则终端将相邻无线接入设备 B作为 目标无线接入设备， 并发起切换。 如果终端 A同时测量到多个相邻无线接 入设备的信号质量大于切换门限， 则终端选择一个最合适的相邻无线接入 设备作为目标无线接入设备， 并发起切换。
步驟 405、这里终端 A在切换过程中 ,直接发起接入到无线接入设备 B。 而保留在无线接入设备 A的与终端 A相关的上下文可由无线无线接入设备 自行处理。 实施例 4:
该实施例基于上述实施例提出一种终端切换的装置， 该装置 500包括：
位于终端的测量模块 501、获取模块 502、切换判断模块 503、切换模块 504, 以及位于无线接入设备的发送模块 510和接入模块 511 ;
测量模块 501 用于对服务器小区的信号质量进行测量， 并判断服务小 区的信号质量是否小于测量门限， 当服务小区的信号质量小于测量门限时， 对相邻无线接入设备进行测量；
获取模块 502用于获取测量门限、 切换门限和 /或相邻无线接入设备的 信息； 所述测量门限及切换门限为所述获取模块 502在终端接入服务小区 时从服务小区获得， 或为所述获取模块 502从本地获取的终端默认设置的 测量门限和切换门限。
切换判断模块 503 用于在服务小区的信号质量小于测量门限时， 根据 对相邻无线接入设备信号质量的测量结果判断相邻无线接入设备的信号质 量是否大于切换门限；
切换模块 504用于在相邻无线接入设备的信号质量大于切换门限时， 向相邻无线接入设备发起切换流程。
发送模块 510用于在终端接入服务小区时向终端发送测量门限及切换 门限， 和 /或发送相邻无线接入设备的信息；
接入模块 511 用于响应终端发起的切换流程， 执行源无线接入设备上 下文释放， 及完成所述终端到本端的接入流程。
由于该装置实施例基于上述方法实施例， 因此该装置所包含的模块都 是为实现上述方法实施例中的步驟流程而设， 其功能都可直接从上述方法 实施例中导出， 任何能从上述方法实施例中抽象、 提取或导出的功能模块 或执行单元都应当属于本发明装置实施例的保护范围之内， 为节省篇幅， 此处不再赘述。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。
工业实用性
本发明改进了终端的切换流程， 使得终端状态变化更为简单， 降低了 无线接入设备的实现成本， 从而更好的满足游牧 /本地无线数据接入场景的 需求。
Claims
1、 一种终端切换的方法， 该方法包括：
终端依据测量门限判断是否需要对相邻无线接入设备的信号质量进行 测量， 当服务小区的信号质量小于测量门限时， 对相邻无线接入设备的信 号质量进行测量；
所述终端依据切换门限判断是否需要执行切换， 当相邻无线接入设备 的信号质量大于切换门限， 所述终端向相邻无线接入设备发起切换流程。
2、 根据权利要求 1所述的方法， 所述方法还包括：
当所述终端接入服务小区时， 由服务小区所属的无线接入设备向所述 终端发送所述测量门限及切换门限， 所述终端接收并保存所述测量门限及 切换门限。
3、 根据权利要求 2所述的方法， 所述无线接入设备采用系统广播的方 式将测量门限以及切换门限发送给服务范围内的所有终端， 或根据终端的 能力将测量门限以及切换门限通过专有信令发送给终端。
4、 根据权利要求 1所述的方法， 所述测量门限及切换门限为所述终端 默认设置的测量门限和切换门限。
5、 根据权利要求 2或 4所述的方法， 所述终端执行切换判断之前还包 括：
所述终端通过扫描获得相邻无线接入设备的信息， 并对扫描到的相邻 无线接入设备进行信号质量测量； 或
由服务小区所属的无线接入设备向所述终端发送相邻无线接入设备的 信息， 所述终端根据接收到的相邻无线接入设备的信息对所述相邻无线接 入设备进行信号质量测量；
所述终端根据对相邻无线接入设备的测量结果判断相邻无线接入设备 的信号质量是否大于所述切换门限， 若大于， 则从信号质量大于所述切换 门限的相邻无线接入设备中选择一个作为目标无线接入设备， 否则不做选 择。
6、 根据权利要求 5所述的方法， 所述无线接入设备采用系统广播的方 式将所述相邻无线接入设备的信息发送给服务范围内的所有终端， 或根据 终端的能力通过专有信令将所述相邻无线接入设备的信息发送给终端。
7、 根据权利要求 1所述的方法， 所述终端向相邻无线接入设备发起切 换流程的方法为：
所述终端发起离开当前服务小区的流程， 释放相关上下文；
所述终端发起接入过程， 接入到所述相邻无线接入设备。
8、 一种终端切换的装置， 包括终端及无线接入设备， 所述终端包括测 量模块、 获取模块、 切换判断模块和切换模块；
测量模块， 用于对服务小区的信号质量进行测量， 并判断服务小区的 信号质量是否小于测量门限， 当服务小区的信号质量小于测量门限时， 对 相邻无线接入设备的信号质量进行测量；
获取模块， 用于获取测量门限、 切换门限和 /或相邻无线接入设备的信 切换判断模块， 用于在服务小区的信号质量小于测量门限时， 根据对 相邻无线接入设备信号质量的测量结果判断相邻无线接入设备的信号质量 是否大于切换门限；
切换模块， 用于在相邻无线接入设备的信号质量大于切换门限时， 向 相邻无线接入设备发起切换流程。
9、 根据权利要求 8所述的装置， 所述无线接入设备包括：
发送模块， 用于在终端接入服务小区时向终端发送测量门限及切换门 限， 和 /或发送相邻无线接入设备的信息；
接入模块， 用于响应终端发起的切换流程， 执行终端上下文释放， 及 完成所述终端到该目标无线接入设备的接入流程。
10、 根据权利要求 8所述的装置， 所述获取模块获取的测量门限及切 换门限由服务小区发送给所述获取模块， 或由所述获取模块从本地获取默 认值。
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| CN103501507B (zh) * | 2013-09-05 | 2017-08-15 | 小米科技有限责任公司 | 一种自动切换无线信号的方法及终端 |
| CN109640365B (zh) * | 2018-12-27 | 2021-09-07 | 中国联合网络通信集团有限公司 | 小区的切换方法、装置及存储介质 |
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| CN101651961A (zh) * | 2008-08-11 | 2010-02-17 | 华为技术有限公司 | 小区重选的方法和终端 |
| CN101730164A (zh) * | 2008-10-17 | 2010-06-09 | 上海华为技术有限公司 | 一种小区重选的方法及终端 |
| CN101742598A (zh) * | 2008-11-07 | 2010-06-16 | 中兴通讯股份有限公司 | 家庭基站小区重选方法和装置 |
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| US20080004023A1 (en) * | 2006-07-03 | 2008-01-03 | Sunplus Technology Co., Ltd. | Cell reselection method and system using an active measurement set in a mobile communication |
| CN101651961A (zh) * | 2008-08-11 | 2010-02-17 | 华为技术有限公司 | 小区重选的方法和终端 |
| CN101730164A (zh) * | 2008-10-17 | 2010-06-09 | 上海华为技术有限公司 | 一种小区重选的方法及终端 |
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