WO2010048846A1 - 终端在接入网间进行软切换时的切换参数更新方法 - Google Patents

终端在接入网间进行软切换时的切换参数更新方法 Download PDF

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Publication number
WO2010048846A1
WO2010048846A1 PCT/CN2009/074189 CN2009074189W WO2010048846A1 WO 2010048846 A1 WO2010048846 A1 WO 2010048846A1 CN 2009074189 W CN2009074189 W CN 2009074189W WO 2010048846 A1 WO2010048846 A1 WO 2010048846A1
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handover
access network
parameter
target
parameters
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PCT/CN2009/074189
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English (en)
French (fr)
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罗雪松
王伟
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中兴通讯股份有限公司
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Publication of WO2010048846A1 publication Critical patent/WO2010048846A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method for updating a handover parameter when a terminal performs soft handover between access networks. Background technique
  • a wireless access point is a base station, and a base station may have multiple cells. Each cell uses different handovers according to network planning or network optimization configuration. parameter.
  • CDMA Code Division Multiple Access
  • the access terminal AT Access Terminal
  • multiple cells are allowed to interact with the terminal at the same time, thereby improving the call quality and data transmission quality through multi-cell diversity.
  • the cell that interacts with the access terminal also switches, the old cell switches, and the new cell switches in. Since different handover parameters are allowed to be used by different cells, there is a handover parameter that the access terminal is using, which is inconsistent with the handover parameter configured by the current serving cell, because the handover parameter that the access terminal is using is the old cell.
  • the parameters may not be consistent with the new cell parameters that are switched in before the access network (AN, Access Network) initiates the update.
  • code division multiple access enhanced data mobile communication protocol defines an Attributeoverride (attribute coverage) process, so that the access network and the access terminal (only one set is stored in the access terminal).
  • Attributeoverride attribute coverage
  • the switching parameters are updated by the method defined in this process; but limited to the definition of the interface, the source side access network does not know the target side access during the soft handover between the access networks.
  • the handover parameters configured by the cells in each base station of the network, and the inevitable inconsistency between the cell handover parameters and the parameters used by the access terminal during the soft handover between the access networks, so that the terminal is likely to switch in the handover area.
  • the present invention provides a method for updating a handover parameter when a terminal performs soft handover between access networks, which increases the success rate of soft handover of an access terminal, reduces dropped calls, and enhances user experience.
  • the invention provides a method for updating a handover parameter when a terminal performs soft handover between access networks, which includes:
  • the access terminal notifies the source access network that it needs to switch to the target cell in the target access network; the source access network acquires the handover parameter of the target cell from the target access network, and according to the acquired target cell The handover parameter updates the handover parameters of the access terminal.
  • the acquiring, by the source access network, the handover parameter of the target cell from the target access network includes: after the source access network learns that the access terminal requests to switch to the target cell, to the target The access network sends a resource allocation request message, indicating the target cell in the resource allocation request message, and the target access network returns a resource allocation request response message to the source access network, and in the response message Carrying handover parameters of the target cell.
  • the acquiring, by the source access network, the handover parameter of the target cell from the target access network includes: after the source access network learns that the access terminal requests to switch to the target cell, to the target The access network sends a handover parameter request message, and the target access network returns a handover parameter request response message to the source access network, and carries the handover parameter of the target cell in the handover parameter request response message.
  • the method further includes:
  • the target access network requests the handover of the target cell according to the access terminal, and allocates resources for the access terminal.
  • the handover parameter includes a handover parameter in the case of the same carrier frequency handover and/or a handover parameter in the case of different carrier frequency handover.
  • the step of the target access network returning the resource allocation request response message or the handover parameter request response message to the source access network includes: encapsulating the handover parameter of the target cell into a format carrying the requested cell information In the resource allocation request response message or the handover parameter request response message, the handover parameter and/or the different carrier frequency switching situation in the case of the same carrier frequency handover
  • the switching parameters define different parameter types and carry their contents in the information of the defined parameter types.
  • the step of the target access network returning a resource allocation request response message or a handover parameter request response message to the source access network includes: encapsulating the handover parameter into a cell information format carried in the resource
  • the handover parameter request response message different cell information types are defined for the handover parameters in the case of the same carrier frequency handover and/or the handover parameters in the case of the different carrier frequency handover, and the contents thereof are respectively It is carried in the defined cell information.
  • the threshold combines the handover parameters of the multiple target cells as the selected handover parameters, and updates the handover parameters of the access terminal.
  • the source access network updates the handover parameters of the access terminal by using an attribute coverage procedure.
  • the target access network sends a response message to the source access network
  • the handover parameter in the same carrier frequency switching condition and/or the handover parameter in the case of different carrier frequency switching in the handover parameter of the target cell Different fields are occupied in the response message.
  • the method of the invention avoids the problems that the terminal is in the handover area, the call parameters do not meet the actual wireless conditions, and the call drop, the network performance is reduced, the handover fails, etc., the success rate of the soft handover of the access terminal is increased, and the call drop situation is reduced. , enhance the user experience.
  • FIG. 1 is a flow chart of a method for updating a handover parameter in the present invention
  • FIG. 2 is a schematic diagram of a method for completing handover parameter transmission in a specific implementation of the present invention.
  • the main idea of the present invention is: when the access terminal performs soft handover, the target access network and the source access
  • the network interaction information enables the source access network to learn the handover parameters of the target cell in the target access network, and after determining the set of handover parameters according to the setting algorithm, the source access network notifies the access terminal to update its handover parameters, thereby enabling the connection.
  • the incoming terminal uses the switching parameters of the most appropriate wireless environment in the switching area to complete the handover.
  • the method for updating the handover parameters includes the following steps:
  • Step 101 The access terminal sends a route update message to the source access network, where the message indicates that the access terminal requires the target cell to be handed over;
  • the route update message may further include a cell to be handed over, a cell being used, a pilot strength reported by each cell, and an identifier indicating whether the cell is to be reserved.
  • Step 102 The source access network acquires a handover parameter of the target cell from the target access network.
  • the handover parameter of the target cell includes a handover parameter under the “same carrier frequency handover”.
  • the switching parameters in both cases include the following required parameter values: PilotAdd-pilot switching, PilotCompare-pilot comparison, PilotDrop-pilot switching, PilotDropTimer-pilot switching de-timer, DynamicThresholds-dynamic switching threshold Whether to use, SoftSlope - Soft Slope, Addlntercept - Add Intercept, Droplntercept to Intercept and NeighborMaxAge - Pro District Maximum Age. The details are shown in Table 1.
  • the switching parameters of the same carrier frequency and different carrier frequencies may be combined into one set of switching parameters, wherein the switching parameters in the same carrier frequency switching condition and the switching parameters in different carrier frequency switching situations occupy different fields in the switching parameters. .
  • the encapsulation format of the Reserved variable N/A handover parameter is described as follows: Reference may be made to the format of the Sector Information Type defined in the High Speed Packet Data Radio Access Network Interface Interworking Protocol, and the Cell Information Type 1 is used to carry the preamble of the cell. Information, as shown in Table 2:
  • the cell information type 2 is set to indicate the handover parameter under "same carrier frequency switching"; the cell information type 3 is set to indicate "different carrier frequency switching" The parameters are switched; and the contents are respectively carried in the corresponding cell information, and the format of the cell information type 2 is as shown in Table 3:
  • the format of the cell information type 3 is the same as that of the above type 3.
  • the cell information type 3 represents the handover parameter under “different carrier frequency switching", as long as it is the source access network and The target access network can be uniquely identified.
  • the encapsulation format 2 of the handover parameters is described as follows:
  • the format type of the "request cell information" defined in the reference high speed packet data radio access network interface interworking protocol can also be used, as shown in Table 4 below:
  • the format of the cell information field is shown in Table 2, and the format of the parameter information field is as shown in Table 5 below:
  • a new parameter type can be defined to indicate the switching parameter, for example: setting the parameter type value to 02H indicates the switching parameter under the same carrier frequency switching; setting the parameter type value to 03H indicates the switching parameter under different carrier frequency switching And fill in the parameter information field with the specific parameter content shown in Table 1.
  • setting the parameter type value to 02H indicates the switching parameter under the same carrier frequency switching
  • setting the parameter type value to 03H indicates the switching parameter under different carrier frequency switching
  • it is not limited to the above limitation as long as the source access network and the target access network can uniquely determine the identifier.
  • other special formats may be set for the handover parameters, as long as the source access network and the target access network can uniquely determine which handover parameters are carried.
  • the source access network may obtain the handover parameters of the target cell from the target access network by:
  • Step 201 The source access network connects to the target Sending a resource allocation request message to the network; indicating, in the message, the target cell that the access terminal requests to switch into;
  • Step 202 The target access network allocates resources (here, the pilot frequency resource) to the access terminal.
  • the handover parameter of the cell (when the handover parameter is encapsulated according to the above encapsulation method, it is carried in this response message).
  • the source access network After receiving the route update message of the access terminal, the source access network sends a handover parameter request message to the target access network, where the handover parameter request message indicates that the access terminal requests to switch to the target cell.
  • the target access network After receiving the message, the target access network sends a handover parameter request to the source access network.
  • the message, and the handover parameter of the target cell is carried in the response message (the handover parameter is encapsulated according to the foregoing encapsulation method and carried in the response message). In this manner, the message format used when the message is exchanged between the source access network and the target access network is set by the system.
  • the method for the source access network to learn the handover parameters of the target cell in the target access network is not limited to the above two.
  • Step 103 The source access network updates the handover parameter of the access terminal, and the process ends.
  • the source access network determines a set of handover according to the handover parameters of each target cell obtained from each target access network.
  • the parameter updates the switching parameters of the access terminal.
  • the source access network determines a set of handover parameters from multiple handover parameters. For example, the source access network selects a handover parameter of the target cell that it considers to be optimal; or determines a set of handover parameters of multiple target cells. Switch parameters to the terminal.
  • the source access network may use the parameter of the nearest cell of the terminal as the selected handover parameter, or combine the handover parameters of the multiple target cells according to the threshold of the handover or handover to the cell handover parameter as the selected handover parameter. .
  • the source access network After determining the handover parameter, the source access network updates the handover parameter of the access terminal by using an Attributeoverride procedure defined in the CDMA lx EV-DO, or according to other methods in the current protocol that can update the access terminal handover parameter to the access terminal. Switch parameters to update.
  • the source access network may also update the handover parameters of the terminal after the terminal successfully switches to the target cell.
  • the method of the present invention avoids the problems of dropped calls, network performance degradation, handover failure, and the like in the handover area due to the handover parameters not meeting the actual wireless conditions, and increases the success rate of soft handover of the access terminal. Reduce call drop and enhance user experience.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明提供一种终端在接入网间进行软切换时的切换参数更新方法,其包括:接入终端通知源接入网所述接入终端要求切换入的目标接入网中的目标小区;源接入网从所述目标接入网获取目标小区的切换参数,并根据所获取的目标小区的切换参数对所述接入终端的切换参数进行更新。本发明的方5 法避免了终端在切换区因切换参数不符合实际无线条件而出现的掉话、网络性能降低、 切换失败等问题, 增加接入终端软切换的成功率, 减少掉话情况,增强用户体验。

Description

终端在接入网间进行软切换时的切换参数更新方法 技术领域
本发明涉及无线通讯领域, 尤其涉及终端在接入网间进行软切换时的切 换参数更新方法。 背景技术
在无线通信系统中, 网络覆盖是由分布在各处的无线接入点来承担的。 以码分多址移动通信 CDMA ( Code Division Multiple Access ) 系统为例, 无 线接入点是基站, 一个基站可能有多个小区, 每个小区根据网络规划或网络 优化的配置, 釆用不同的切换参数。
接入终端 AT ( Access Terminal ) 的一个连接中, 同时允许有多个小区与 此终端进行交互,从而通过多小区的分集合并提高通话质量和数据传输质量。 随着接入终端的移动, 与接入终端进行交互的小区也在发生切换, 旧的小区 切换去, 新的小区切换入。 由于允许不同小区釆用不同的切换参数, 也就存 在着接入终端正在使用的切换参数, 与当前服务小区所配置的切换参数不一 致的情况, 因为接入终端正在使用的切换参数, 是旧小区的参数, 在接入网 ( AN, Access Network )没有发起更新之前, 与切换入的新小区参数可能不 一致。
在目前的接口规范中, 如 CDMA lx EV-DO即码分多址增强数据移动通 信协议中定义了 Attributeoverride (属性覆盖)流程,使接入网与接入终端(接 入终端中只保存有一套切换参数 )在连接状态下通过此流程中定义的方法进 行切换参数的更新; 但限于接口的定义, 终端在接入网间进行软切换的过程 中, 源侧接入网不知道目标侧接入网各个基站下各小区所配置的切换参数, 而在接入网间软切换时又不可避免的存在着小区切换参数与接入终端使用的 参数不一致的情况, 从而导致终端在切换区容易出现切换失败、 网络性能降 低、 掉话等, 直接影响到用户体验的问题。 发明内容 为解决现有技术问题, 本发明提供终端在接入网间进行软切换时的切换 参数更新方法, 增加接入终端软切换的成功率, 减少掉话情况, 增强用户体 验。
本发明提供了一种终端在接入网间进行软切换时的切换参数更新方法, 其包括:
接入终端通知源接入网其要求切换入的目标接入网中的目标小区; 源接入网从所述目标接入网获取目标小区的切换参数, 并根据所获取的 所述目标小区的切换参数对所述接入终端的切换参数进行更新。
进一步地, 所述源接入网从所述目标接入网获取目标小区的切换参数具 体包括: 所述源接入网得知所述接入终端要求切换入的目标小区后, 向所述 目标接入网发送资源分配请求消息, 在所述资源分配请求消息中指示出所述 目标小区, 所述目标接入网向所述源接入网返回资源分配请求响应消息 , 并 在此响应消息中携带所述目标小区的切换参数。
进一步地, 所述源接入网从所述目标接入网获取目标小区的切换参数具 体包括: 所述源接入网得知所述接入终端要求切换入的目标小区后, 向所述 目标接入网发送切换参数请求消息, 所述目标接入网向所述源接入网返回切 换参数请求响应消息, 并在所述切换参数请求响应消息中携带所述目标小区 的切换参数。
进一步地, 所述方法在所述目标接入网向所述源接入网返回资源分配请 求响应消息或切换参数请求响应消息的所述步骤之前还包括:
目标接入网根据所述接入终端请求切换入的目标小区, 为所述接入终端 分配资源。
进一步地, 所述切换参数中包括相同载频切换情况下的切换参数和 /或不 同载频切换情况下的切换参数。
进一步地, 所述目标接入网向所述源接入网返回资源分配请求响应消息 或切换参数请求响应消息的所述步骤包括: 将所述目标小区的切换参数封装 成请求小区信息的格式携带在所述资源分配请求响应消息或切换参数请求响 应消息中, 为所述相同载频切换情况下的切换参数和 /或所述不同载频切换情 况下的切换参数定义不同的参数类型, 并将其内容分别携带在所定义的参数 类型的信息中。
进一步地, 所述目标接入网向所述源接入网返回资源分配请求响应消息 或切换参数请求响应消息的所述步骤包括: 将所述切换参数封装成小区信息 的格式携带在所述资源分配请求响应消息或切换参数请求响应消息中, 为所 述相同载频切换情况下的切换参数和 /或所述不同载频切换情况下的切换参 数定义不同的小区信息类型, 并将其内容分别携带在所定义的小区信息中。
进一步地,所述源接入网对所述接入终端的切换参数进行更新具体包括: 所述源接入网从所述目标接入网接收到所述目标小区的切换参数后, 或者在 所述接入终端切换入目标小区成功之后, 源接入网将距离所述接入终端最近 的目标小区的参数作为选定的切换参数, 或者根据设定的切换入或切换去目 标小区切换参数的门限将多个目标小区的切换参数合并后作为选定的切换参 数, 对接入终端的切换参数进行更新。
进一步地, 所述源接入网釆用属性覆盖流程对接入终端的切换参数进行 更新。
进一步地, 所述目标接入网向所述源接入网发送响应消息时, 所述目标 小区的切换参数中相同载频切换情况下的切换参数和 /或不同载频切换情况 下的切换参数在所述响应消息中占用不同字段。
本发明的方法,避免了终端在切换区, 因切换参数不符合实际无线条件, 而出现的掉话、 网络性能降低、 切换失败等问题, 增加接入终端软切换的成 功率, 减少掉话情况, 增强用户体验。 附图概述
图 1是本发明中切换参数更新方法的流程图;
图 2是本发明具体实现中完成切换参数传输的方法示意图。
本发明的较佳实施方式
本发明的主要思路是: 在接入终端进行软切换时, 目标接入网与源接入 网交互信息, 使源接入网获知目标接入网中目标小区的切换参数, 源接入网 根据设定算法确定一套切换参数后, 通知接入终端对其切换参数进行更新, 从而使接入终端在切换区使用最贴切无线环境的切换参数, 完成切换。
本发明中, 切换参数的更新方法包括以下步骤:
步骤 101 , 接入终端向源接入网发送路由更新消息, 此消息中指示出本 接入终端要求切换入的目标小区;
路由更新消息中还可以包括待切换去的小区、 正在使用的小区、 每个小 区上报的导频强度和表明该小区是否要保留的标识。
步骤 102, 源接入网从所述目标接入网获取目标小区的切换参数; 目 标小区的切换参数包括 "相同载频切换 " 下的切换参数
( SetSameChannelManagementValue ) 和 "不同载频切换" 下的切换参数 ( SetDifferentChannelManagementValue )。此两种情况下的切换参数中均包括 以下必要参数值: PilotAdd-导频切换入, PilotCompare-导频比较, PilotDrop- 导频切换去, PilotDropTimer-导频切换去定时器, DynamicThresholds-动态切 换门限是否使用, SoftSlope-软斜率, Addlntercept-加截距, Droplntercept去截 距和 NeighborMaxAge-临区最大年龄。 具体如表 1所示。
随协议的演进,相同载频和不同载频的切换参数可能合为一套切换参数, 其中, 切换参数中相同载频切换情况下的切换参数和不同载频切换情况下的 切换参数占用不同字段。
De a l Value
Le gth S /A
Attiib telD /A
O e or mcsre of th fofiowiri record;
s M/A
Pi!otAdd 6 OsOs
'PilotCompare 6 0x05
Piio Drop 6 0x12
Pilo DropTimer 4 3
1 0
SaftSlope: 0 or 6 N/A
Addlnter ept 0 or 6 N/A
Drcsplntercepi 0 or 6 M/A
N^ighborMaxAge 4 0
Reserved variable N/A 切换参数的封装格式一描述如下: 可以参考高速分组数据无线接入网接 口互操作协议中定义的小区信息 (Sector Information Type) 的格式, 小区信 息类型 1用于携带小区的前导信息, 如表 2所示:
表 2
Figure imgf000007_0001
参考此小区信息的格式, 设置小区信息类型二, 用于表示 "相同载频切 换" 下的切换参数; 设置小区信息类型三, 用于表示 "不同载频切换" 下的 切换参数; 并将其内容分别携带在相应的小区信息中, 小区信息类型二的格 式如表 3所示:
表 3:
•7 6 5 4 3 7 ! 0 Octet
Sector liif rniaiks ii Tv-pe:;;|02B ] ( '} 、区信息 :型 2) I
Sector liiformation Length ( ΛΪ ί' -、, Ί 2
SetSaiiKChaooeiManagemeaiValue(¾同载频切渙下的 ΐ 有效位
0 碰位 小区信息类型三的格式与上述类型三的同理。
在实际应用中, 不限于用以上用小区信息类型二表示 "相同载频切换" 下的切换参数; 用小区信息类型三表示 "不同载频切换" 下的切换参数, 只 要是源接入网和目标接入网能够唯一确定的标识即可。
切换参数的封装格式二描述如下: 还可以使用参考高速分组数据无线接 入网接口互操作协议中定义的 "请求小区信息" 的格式类型, 如下述表 4所 示:
表 4:
Figure imgf000008_0001
其中, 小区信息字段的格式如表 2所示, 而参数信息字段的格式如下述 表 5所示:
Figure imgf000009_0001
此处, 可以定义新的参数类型用于表示切换参数, 例如: 设置参数类型 值为 02H时表示相同载频切换下的切换参数; 设置参数类型值为 03H时表示 不同载频切换下的切换参数, 并分别在参数信息字段填入表 1所示的具体参 数内容。 在实际应用中, 不限于上述限定, 只要是源接入网和目标接入网能 够唯一确定的标识即可。 除了上述封装格式, 还可以为切换参数设置其它专用格式, 只要使源接 入网和目标接入网能够唯一确定其中携带的为切换参数即可。
步骤 102中具体可通过以下方式使源接入网从目标接入网处获取目标小 区的切换参数:
方式一, 利用已有的 "高速分组数据无线接入网接口互操作协议, 3GPP2 A.S0008-C vl .O即 Interoperability Specification (IOS) for High Rate Packet Data (HRPD) Radio Access Network Interfaces with Session Control in the Access Network" 中的资源分配请求消息 (Allocate Request )和资源分配响应消息 ( Allocate Response ) , 如图 2所示, 完成切换参数传输的方法具体包括: 步骤 201 , 源接入网向目标接入网发送资源分配请求消息; 在此消息中 指示出所述接入终端请求切换入的目标小区;
步骤 202, 目标接入网为接入终端分配资源 (此处是指导频资源) ; 步骤 203 , 目标接入网向源接入网返回资源分配响应消息 , 并在此响应 消息中携带所述目标小区的切换参数 (将切换参数根据上述封装方法进行封 装后, 携带在此响应消息中) 。
方式二, 源接入网在收到接入终端的路由更新消息后, 向目标接入网发 送切换参数请求消息, 所述切换参数请求消息中指出所述接入终端请求切换 入的目标小区, 目标接入网收到此消息后, 向源接入网发送切换参数请求响 应消息, 并在此响应消息中携带所述目标小区的切换参数(将切换参数根据 上述封装方法进行封装后, 携带在此响应消息中) 。 在此方式中, 源接入网 和目标接入网之间交互消息时釆用的消息格式由系统设定。
本发明中, 使源接入网获知目标接入网中目标小区的切换参数的方法并 不限于上述两种。
步骤 103 , 源接入网对接入终端的切换参数进行更新, 流程结束。
接入终端的目标接入网可能有多个, 目标接入网中又有多个目标小区, 源接入网根据从各目标接入网处获得的各目标小区的切换参数, 确定一套切 换参数, 对接入终端的切换参数进行更新。 源接入网从多个切换参数中确定 一套切换参数的方式有很多, 例如, 源接入网选择其认为最优的目标小区的 切换参数; 或综合多个目标小区的切换参数确定一套切换参数使终端。 源接 入网可以将距离终端最近小区的参数作为选定的切换参数, 或者根据设定的 切换入或切换去小区切换参数的门限将多个目标小区的切换参数合并后作为 选定的切换参数。 源接入网确定切换参数后, 通过 CDMA lx EV-DO中定义 的 Attributeoverride流程对接入终端的切换参数进行更新, 或者根据目前协议 中其他能够更新接入终端切换参数的方法对接入终端的切换参数进行更新。
源接入网还可以在终端切换入目标小区成功之后, 再对终端的切换参数 进行更新。
本发明还可有其他多种实施例,在不背离本发明精神及其实质的情况下 , 应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
与已有技术相比, 本发明的方法避免了终端在切换区因切换参数不符合 实际无线条件而出现的掉话、 网络性能降低、 切换失败等问题, 增加接入终 端软切换的成功率, 减少掉话情况, 增强用户体验。

Claims

权 利 要 求 书
1、 一种终端在接入网间进行软切换时的切换参数更新方法, 其包括: 接入终端通知源接入网所述接入终端要求切换入的目标接入网中的目标 小区;
源接入网从所述目标接入网获取目标小区的切换参数, 并根据所获取的 目标小区的切换参数对所述接入终端的切换参数进行更新。
2、 如权利要求 1所述的方法, 其中, 源接入网从所述目标接入网获取目 标小区的切换参数的所述步骤包括:
所述源接入网得知所述接入终端要求切换入的目标小区后, 向所述目标 接入网发送资源分配请求消息, 在所述资源分配请求消息中指示出所述目标 小区, 所述目标接入网向所述源接入网返回资源分配请求响应消息 , 并在所 述资源分配请求响应消息中携带所述目标小区的切换参数。
3、 如权利要求 1所述的方法, 其中, 源接入网从所述目标接入网获取目 标小区的切换参数的所述步骤包括:
所述源接入网得知所述接入终端要求切换入的目标小区后, 向所述目标 接入网发送切换参数请求消息, 在所述切换参数请求消息中指示出所述目标 小区, 所述目标接入网向所述源接入网返回切换参数请求响应消息, 并在所 述切换参数请求响应消息中携带所述目标小区的切换参数。
4、 如权利要求 2或 3所述的方法, 其中,
所述方法在所述目标接入网向所述源接入网返回资源分配请求响应消息 或者切换参数请求响应消息的所述步骤之前, 还包括:
所述目标接入网根据所述接入终端请求切换入的目标小区, 为所述接入 终端分配资源。
5、 如权利要求 4所述的方法, 其中,
所述目标小区的切换参数中包括相同载频切换情况下的切换参数和 /或 不同载频切换情况下的切换参数。
6、 如权利要求 5所述的方法, 其中, 所述目标接入网向所述源接入网返回资源分配请求响应消息或者切换参 数请求响应消息的所述步骤包括: 将所述目标小区的切换参数封装成请求小 区信息的格式携带在所述资源分配请求响应消息或者参数切换请求响应消息 中, 为相同载频切换情况下的切换参数和 /或不同载频切换情况下的切换参数 定义不同的参数类型, 并将所述相同载频切换情况下的切换参数和 /或不同载 频切换情况下的切换参数的内容分别携带在所定义的不同的参数类型的信息 中。
7、 如权利要求 5所述的方法, 其中,
所述目标接入网向所述源接入网返回资源分配请求响应消息或者切换参 数请求响应消息的所述步骤包括: 将目标小区的切换参数封装成小区信息的 格式携带在所述资源分配请求响应消息或者参数切换请求响应消息中, 为相 同载频切换情况下的切换参数和 /或不同载频切换情况下的切换参数定义不 同的小区信息类型, 并将所述相同载频切换情况下的切换参数和 /或不同载频 切换情况下的切换参数的内容分别携带在所定义的不同的小区信息中。
8、 如权利要求 1、 2或 3所述的方法, 其中, 根据所获取的目标小区的 切换参数对所述接入终端的切换参数进行更新的所述步骤包括:
所述源接入网从所述目标接入网接收到所述目标小区的切换参数后, 或 者在所述接入终端切换入目标小区成功之后, 源接入网将距离所述接入终端 最近的目标小区的参数作为选定的切换参数, 或者根据设定的切换入或切换 去目标小区切换参数的门限将多个目标小区的切换参数合并后作为选定的切 换参数, 对接入终端的切换参数进行更新。
9、 如权利要求 8所述的方法, 其中,
对接入终端的切换参数进行更新的所述步骤中, 所述源接入网釆用属性 覆盖流程对接入终端的切换参数进行更新。
10、 如权利要求 4所述的方法, 其中,
所述目标接入网向所述源接入网返回资源分配请求响应消息或者切换参 数请求响应消息的所述步骤中, 所述目标小区的切换参数中相同载频切换情 况下的切换参数和 /或不同载频切换情况下的切换参数在所述资源分配请求 响应消息或切换参数请求响应消息中占用不同的字段。
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