WO2009076833A1 - 切换方法、交换设备及终端设备 - Google Patents

切换方法、交换设备及终端设备 Download PDF

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Publication number
WO2009076833A1
WO2009076833A1 PCT/CN2008/073215 CN2008073215W WO2009076833A1 WO 2009076833 A1 WO2009076833 A1 WO 2009076833A1 CN 2008073215 W CN2008073215 W CN 2008073215W WO 2009076833 A1 WO2009076833 A1 WO 2009076833A1
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WIPO (PCT)
Prior art keywords
switching device
link
terminal
service link
office
Prior art date
Application number
PCT/CN2008/073215
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English (en)
French (fr)
Inventor
Shengqiang Yang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009076833A1 publication Critical patent/WO2009076833A1/zh
Priority to US12/814,280 priority Critical patent/US8238914B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point

Definitions

  • the present invention relates to the field of communications, and in particular, to a handover method, a switching device, and a terminal device.
  • a mobile station In a wireless cellular mobile network, a mobile station (MS) can arbitrarily roam, and during the user's call, due to the movement of the MS, the coverage of the first base station (BS) beyond the original access is exceeded, and the other second BS is entered. Coverage, at this time, the mobile station needs to communicate with the second BS through the handover process to keep the user's conversation uninterrupted.
  • MS mobile station
  • BS base station
  • wireless cellular mobile networks offer two switching technologies: hard handover and soft handover.
  • Hard handover When the MS moves, it detects that the first BS signal has deteriorated to a certain threshold or detects a stronger and better signal of the second BS, and then reports it to the mobile switching center (MSC). The MSC decides according to a certain algorithm. If a hard handover needs to be performed, the MS is instructed to perform handover, interrupt communication with the first BS, and attempt to establish a service connection with the second BS.
  • MSC mobile switching center
  • the CDMA MS is equipped with a rake-like RAKE multipath receiver that can simultaneously support multiple signal path reception.
  • a branch of the RAKE multipath receiver can be used to establish a service connection with the second BS without interrupting the service link with the first BS.
  • the above two switching methods are all used by the first BS and the second BS to work together to complete the switching process with the MS.
  • an interoperation interface needs to be designed on each related network device, and a protocol for communication between the related network devices is established to support the normal handover process;
  • the wireless network belongs to different network systems, it is more necessary to design an interoperation interface between network devices in different network systems, and establish a communication protocol between network devices in different network systems to support the normal process of switching between networks.
  • the embodiments of the present invention provide a handover method, a switching device, and a terminal device, to simplify the handover process, improve the versatility of the handover process, and reduce the design difficulty and implementation cost of the network.
  • the embodiment of the present invention provides a handover method, in which a first service link is established between a first terminal and a second terminal by using a switching device, and the method includes:
  • the first switching device sends a link establishment request to the switching device on the first service link according to the call request, where the setup link request carries the address information of the first terminal and the second terminal. ;
  • the switching device on the first service link establishes a link with the first switching device according to the establishing a link request
  • the switching device on the first service link removes the link between the first service link and the first terminal, and the first service link itself and the second terminal The link between the link and itself and the link between the first switching device.
  • the embodiment of the present invention further provides a switching device, where the switching is performed when the first service link is established between the first terminal and the second terminal, and the device includes:
  • a receiving unit configured to receive a call request of the first terminal, where the call request carries office route information of a switching device on the first service link, and the call request indicates that the called party is the second Terminal
  • a link unit configured to send, according to the call request received by the receiving unit, a connection establishment request to the switching device on the first service link, where the establishing the link request carries the first terminal and the second The address information of the terminal.
  • the embodiment of the present invention further provides a switching device, where the switching is performed when the first service link is established between the first terminal and the second terminal, and the device includes:
  • a receiving unit configured to receive a link establishment request of the first switching device, where the setup link request carries address information of the first terminal and the second terminal;
  • a link unit configured to establish, according to the setup link request received by the receiving unit, a link between the switching device and the first switching device;
  • An checking unit configured to check a connection relationship table according to address information of the first terminal and the second terminal in the establishment link request received by the receiving unit;
  • a switching unit configured to: when the checking unit finds that the first service link is established between the first terminal and the second terminal, and between the switching device on the first service link and the first terminal The link is removed, and the link between the switching device and the second terminal and the link established between the link unit and the first switching device are overlapped.
  • the embodiment of the present invention further provides a terminal device, where the terminal device is used to establish a first service link between the terminal device and the peer end, and the device includes:
  • a receiving unit configured to receive office routing information of the switching device on the first service link, and a determining unit, configured to determine whether a handover needs to be initiated;
  • a sending unit configured to: when the determining unit determines that the handover needs to be initiated, send a call request to the first switching device, where the call request carries the office of the switching device on the first service link that is received by the receiving unit To the information, the called party indicated by the call request is the peer.
  • the first service link is established between the first terminal and the second terminal by using the switching device, and the first terminal initiates a call request, and the call request indicates When the called terminal is the second terminal, the call is actually a handover; the first switching device routes the call target to the first service link according to the office direction information of the switching device on the first service link in the call request.
  • the switching device is configured to establish a link between the first switching device and the switching device on the first service link, and complete the switching between the first service link and the first terminal by the switching device on the first service link. The link is removed, and the link between itself and the second terminal in the first service link and the link between itself and the first switching device are overlapped.
  • the switching mode provided by the embodiment of the present invention is simple in operation and strong in versatility, and is applicable to switching between various wireless network systems and different wireless network systems, thereby reducing network design difficulty and implementation cost.
  • FIG. 1 is a schematic diagram of a handover procedure according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of device connection according to a method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a switching device according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a switching device according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal device according to Embodiment 4 of the present invention.
  • Office-direction information For a specific switching device, the office-direction information is used to locate the information of the switching device.
  • the office-direction information is unique on the entire network, and may be an identifier (ID) of the switching device, or IP address, etc.
  • the link relationship table can be checked according to the calling and called addresses. When it is checked that the service link has been established between the calling party and the called party, Release the original service link between the calling and the called, and enable the new service link between the calling and the called.
  • Embodiment 1 A method of handover. The first terminal establishes a call with the second terminal by using the first base station, and the call link established between the first terminal and the second terminal is the first service link.
  • the switching device on the first service link After the first service link is established, the switching device on the first service link sends the office route information to the first terminal by using the office route notification message if the general switch logic is supported.
  • the office route notification message can be either an in-band message or an out-of-band message.
  • the switching device on the first service link may also send its own office route information to the second terminal by using the office route notification message, the second terminal stores the office route information, and the manner in which the second terminal initiates the handover with the first terminal. In the embodiment, only the first terminal is taken as an example for description.
  • the switching device on the first service link sends its own office route information to the first terminal, the first terminal stores the office route information of the switching device on the first service link.
  • the first terminal can store office information in the following manner:
  • the first terminal stores the office routing information of the switching device. 2. When there are multiple switching devices on the first service link that support the general switching logic, the first terminal may store only the office routing information of one switching device, and may also store the office routing information of multiple switching devices.
  • the way in which the first terminal stores office routing information of a switching device includes:
  • the office route information storage rule is configured, and the office route information of the switching device on the first service link is stored according to the rule.
  • the manner in which the first terminal stores office routing information of multiple switching devices includes:
  • the office route information of the switching device on the first service link is sequentially stored according to the order of arrival of the office routing information of the switching device on the first service link in a call or a handover process;
  • the office route information of the switching device on the first service link is stored in reverse order according to the arrival order of the office information of the switching device on the first service link in a call or a handover process;
  • FIG. 1 is a schematic diagram of a handover procedure according to Embodiment 1 of the present invention.
  • Fig. 2 is a schematic view showing the connection of devices of the method of the first embodiment of the present invention.
  • the service link represented by the solid line between the second terminal and the switching device on the first service link in FIG. 2 is referred to as a first-stage service link, and the switching device on the first service link is used.
  • the service link shown by the solid line between the first terminal and the first terminal is called the second service link
  • the service link shown by the dotted line between the switching device on the first service link and the first terminal is called the third link.
  • Segment service link In FIG. 2, the first service link includes a first segment of service link and a second segment of service link, and the second service link includes the first Segment service link and third segment service link.
  • Step 101 The first switching device of the network where the second base station is located receives the call request of the first terminal, where the call request carries the office route information of the switching device on the first service link, and the called party indicated by the call request is the second terminal.
  • the call request may carry only one office route information of the switching device on the first service link, or may carry the office route information of the switching device on the two or more first service links.
  • Step 102 The first switching device sends a link establishment request to the switching device on the first service link according to the call request, where the link request carries the address information of the first terminal and the second terminal.
  • the method for sending a link establishment request to the switching device on the first service link includes:
  • the first switching device When the call request carries only one office route information of the switching device on the first service link, the first switching device sends a link establishment request to the switching device on the first service link corresponding to the office route information. Step 103 is performed. If the link fails to be established, the first switching device rejects the call and terminates the handover of the first terminal.
  • the first switching device sends the local office information to the first terminal cache, so that the first terminal initiates the switching.
  • the call request carries the office route information of the switching device on the first service link
  • the first switching device sends a link establishment request to the switching device corresponding to the first office information in the office route information according to the call request.
  • the link fails to be established, the first switching device continues to send a link establishment request to the switching device corresponding to the next office route information, until the link is successfully established, and step 103 is performed; if the link cannot be established successfully, the first switching device The call is rejected, and the handover of the first terminal is terminated.
  • Step 103 The switching device on the first service link establishes a link with the first switching device according to the establishment of the link request, and the switching device on the first service link associates itself with the first service link.
  • the link between the terminals is removed, and the link between the first service link and the second terminal is connected with the link between the first terminal and the first switching device to establish a second service link.
  • the switching device on the first service link sends the local office information to the first terminal cache, so that the subsequent first terminal initiates Used when switching.
  • the first terminal processes the office route information of the cached first switching device and the new office route information of the switching device on the first service link in the following manner:
  • the office routing information of the first switching device is stored, and the first service link is used.
  • the new office route information of the switching device on the first service link covers the office route information originally stored by the switching device on the first service link on the first terminal.
  • the first terminal also needs to clear the office route information of the other device between the first terminal and the switching device on the first service link on the first service link.
  • Embodiment 2 A switching device is used for switching in a case where a first service link has been established between a first terminal and a second terminal.
  • FIG. 3 is a schematic structural diagram of a switching device according to Embodiment 2 of the present invention.
  • the receiving unit 301 is configured to receive a call request of the first terminal, where the call request carries the office route information of the switching device on the first service link, and the called party indicated by the call request is the second terminal;
  • the link unit 302 is configured to send a link establishment request to the switching device on the first service link according to the call request received by the receiving unit, where the link request carries the address information of the first terminal and the second terminal.
  • the call request carries office route information of multiple switching devices on the first service link; further link units include:
  • a sending subunit configured to send a link establishment request to the switching device on the first service link corresponding to the office route information according to the call request;
  • a determining subunit configured to determine, after the sending subunit sends a link establishment request, whether the establishment of the link is successful;
  • control subunit configured to: when the determining subunit determines that the link establishment fails, generate a control instruction, where the control instruction is used to control the sending subunit to send a link establishment request to the switching device on the first service link corresponding to the office direction information Until the link is established successfully.
  • the switching device also includes:
  • a sending unit configured to: when the switching device supports the universal switching logic, send the office routing information of the switching device to the first terminal; and/or,
  • FIG. 4 is a schematic structural diagram of a switching device according to Embodiment 3 of the present invention.
  • the receiving unit 401 is configured to receive a link establishment request of the first switching device, where the link request carries the address information of the first terminal and the second terminal;
  • the link unit 402 is configured to establish a link between the switching device and the first switching device according to the establishment of the link request received by the receiving unit.
  • the checking unit 403 is configured to check the connection relationship table according to the address information of the first terminal and the second terminal in the establishment link request received by the receiving unit;
  • the switching unit 404 is configured to: when the checking unit finds that the first service link has been established between the first terminal and the second terminal, according to the link between the switching device established by the link unit and the first switching device, Delinking between the switching device and the first terminal in a service link, establishing a link between the switching device and the second terminal, and the link unit A link between the switching devices.
  • the switching device further includes: a first sending unit, configured to: after the switching unit switches the first service link to the second service link, The office route information of the switching device is sent to the first terminal.
  • the switching device further includes:
  • the second sending unit is configured to: after the switching unit switches the first service link to the second service link, send the office route information of the switching device to the second terminal.
  • the fourth embodiment is a terminal device, where the terminal device is used for the handover in the case that the terminal device has established a first service link with the opposite end.
  • FIG. 5 is a schematic structural diagram of a terminal device according to Embodiment 4 of the present invention.
  • the receiving unit 501 is configured to receive office routing information of the switching device on the first service link, and the determining unit 502 is configured to determine whether the switching needs to be initiated.
  • the sending unit 503 is configured to: when the determining unit determines that the handover needs to be initiated, send a call request to the first switching device, where the call request carries the office direction information of the switching device on the first service link received by the receiving unit, and the call request indication is Called the opposite end.
  • the receiving unit includes:
  • a receiving subunit configured to receive office route information of the switching device on the first service link
  • a storage subunit configured to store office route information of a switching device on a first service link that arrives last in a call or during a handover;
  • the office route information of the switching device on the first service link is sequentially stored in the order of arrival of the office routing information of the switching device on the first service link in a call or a handover process;
  • the office route information of the switching device on the first service link is stored in reverse order according to the arrival order of the office information of the switching device on the first service link in a call or a handover process.
  • the present invention can be implemented by means of software plus a necessary hardware platform, and of course, all can be implemented by hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product.
  • the computer software product may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform various embodiments of the present invention.
  • a computer device which may be a personal computer, a server, or a network device, etc.

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  • Computer Networks & Wireless Communication (AREA)
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Description

切换方法、 交换设备及终端设备
本申请要求于 2007 年 12 月 13 日提交中国专利局、 申请号为 200710172402.X, 发明名称为"切换方法、 交换设备及终端设备"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
本发明涉及通信领域, 尤其涉及切换方法、 交换设备及终端设备。
背景技术
在无线蜂窝移动网络中, 移动台 (MS )可以任意漫游, 在用户通话过程 中, 由于 MS的移动而导致超出原有接入的第一基站 (BS)覆盖范围, 而进入其 它的第二 BS覆盖范围, 此时需要通过切换过程使移动台与第二 BS进行连接通 信, 保持用户通话的不间断。
目前无线蜂窝移动网络提供了两种切换技术: 硬切换和软切换。
硬切换: 当 MS移动时, 检测到第一 BS信号变差到某一门限或检测到第二 BS更强更好的信号后, 就会上报给移动交换中心 (MSC ) , MSC根据一定算 法判决需要执行硬切换, 则指示 MS进行切换, 中断与第一 BS通信, 并尝试与 第二 BS建立业务连接。
软切换: 在码分多址(CDMA )制式无线蜂窝移动网络中, CDMA MS装 配有一类似耙子的 RAKE多径接收机,可以同时支持多个信号路径接收。 当 MS 移动时,检测到一个第二 BS的强信号后, 可以利用 RAKE多径接收机的某个支 路与第二 BS建立业务连接, 而不需要中断与第一 BS的业务链路。
以上两种切换方法都是釆用由第一 BS与第二 BS之间协同工作, 完成与 MS之间的切换流程。 当切换涉及到的网络设备跨度比较大时, 需要在每个相 关的网络设备上设计互操作接口, 并建立相关的网络设备之间通信的协议, 以 支持整个切换流程的正常进行; 当涉及的无线网络属于不同网络系统时, 更需 要设计不同网络系统中的网络设备之间的互操作接口,以及建立不同网络系统 中的网络设备之间的通信协议以支持跨网络间的切换流程的正常进行;如果将 来新增加了无线网络系统,还需要设计现有网络系统与新增加网络系统中的网 络设备之间的互操作接口,以及建立现有网络系统与新增加网络系统中的网络 设备之间的通信协议以支持与新增加网络之间的切换流程的正常进行。目前这 种切换设计比较复杂, 可扩展性不强, 设计难度和实现成本都很高。 发明内容
本发明实施例提供了切换方法、 交换设备及终端设备, 以简化切换流程, 提高切换流程的通用性, 降低网络的设计难度和实现成本。
本发明实施例提供了一种切换方法, 第一终端与第二终端之间已经通过交 换设备建立第一业务链路, 该方法包括:
第一交换设备接收所述第一终端的呼叫请求, 所述呼叫请求中携带所述第 一业务链路上的交换设备的局向信息,所述呼叫请求指示的被叫为所述第二终 端;
所述第一交换设备根据所述呼叫请求, 向所述第一业务链路上的交换设备 发送建立链路请求 ,所述建立链路请求中携带所述第一终端和第二终端的地址 信息;
所述第一业务链路上的交换设备根据所述建立链路请求, 建立与所述第一 交换设备之间的链路;
所述第一业务链路上的交换设备将所述第一业务链路中自身与所述第一 终端之间的链路拆除,将所述第一业务链路中自身与所述第二终端之间的链路 和自身与所述第一交换设备之间的链路搭接。
本发明实施例还提供了一种交换设备, 用于第一终端与第二终端之间已经 建立第一业务链路的情况下的切换, 该设备包括:
接收单元, 用于接收所述第一终端的呼叫请求, 所述呼叫请求中携带所述 第一业务链路上的交换设备的局向信息 ,所述呼叫请求指示的被叫为所述第二 终端;
链路单元, 用于根据所述接收单元接收的呼叫请求, 向所述第一业务链路 上的交换设备发送建立链路请求,所述建立链路请求中携带所述第一终端和第 二终端的地址信息。
本发明实施例还提供了一种交换设备, 用于第一终端与第二终端之间已经 建立第一业务链路的情况下的切换, 该设备包括:
接收单元, 用于接收第一交换设备的建立链路请求, 所述建立链路请求中 携带所述第一终端和第二终端的地址信息; 链路单元, 用于根据所述接收单元接收的所述建立链路请求, 建立所述交 换设备与所述第一交换设备之间的链路;
检查单元, 用于根据所述接收单元接收的建立链路请求中的第一终端和第 二终端的地址信息, 检查连接关系表;
切换单元, 用于当所述检查单元发现所述第一终端和第二终端之间已经建 立第一业务链路,将所述第一业务链路上的交换设备与所述第一终端之间的链 路拆除,将所述交换设备与所述第二终端之间的链路和所述链路单元建立的与 所述第一交换设备之间的链路搭接。
本发明实施例还提供了一种终端设备,用于所述终端设备已经与对端之间 建立第一业务链路的情况下的切换, 该设备包括:
接收单元, 用于接收所述第一业务链路上交换设备的局向信息; 判断单元, 用于判断是否需要发起切换;
发送单元, 用于当所述判断单元判断需要发起切换时, 向第一交换设备发 送呼叫请求,所述呼叫请求中携带所述接收单元接收的所述第一业务链路上的 交换设备的局向信息, 所述呼叫请求指示的被叫为所述对端。
釆用本发明实施例提供的切换方法、 交换设备及终端设备, 第一终端与第 二终端之间通过交换设备已经建立第一业务链路, 第一终端又发起呼叫请求, 该呼叫请求指示的被叫为第二终端, 则该呼叫实际上为切换; 第一交换设备根 据呼叫请求中第一业务链路上交换设备的局向信息,将该呼叫定点靶向路由到 第一业务链路上的交换设备,只要建立第一交换设备与第一业务链路上交换设 备之间的链路,由第一业务链路上的交换设备完成将第一业务链路中自身与第 一终端之间的链路拆除,将第一业务链路中自身与第二终端之间的链路和自身 与第一交换设备之间的链路搭接。这样, 只需要升级第一业务链路上的交换设 备支持通用切换逻辑,对于第一交换设备是否支持通用切换逻辑不作要求,对 于现有网络中难以对所有交换机一一升级支持通用切换逻辑的情况,釆用本发 明实施例提供的切换方式, 操作简单, 通用性强, 适用于各种无线网络系统内 和不同无线网络系统之间的切换, 降低网络的设计难度和实现成本。
附图说明
图 1所示为根据本发明实施例一的切换流程示意图。 图 2为本发明实施例一方法的设备连接示意图。
图 3所示为根据本发明实施例二的交换设备的结构示意图。
图 4所示为根据本发明实施例三的交换设备的结构示意图。
图 5所示为根据本发明实施例四的终端设备的结构示意图。
具体实施方式
下面对本发明进行详细说明。
在介绍具体方案之前, 首先介绍两个术语:
局向信息: 针对一个特定的交换设备,局向信息为用于定位到该交换设备 的信息, 局向信息在全网唯一, 可以为该交换设备的标识 (ID ), 或者为该交 换设备的 IP地址等。
通用切换逻辑: 针对一个特定的交换设备, 支持以下功能的则称为支持通 用切换逻辑: 能够根据主被叫地址检查链接关系表, 当检查出主被叫之间已经 建立了业务链路时,释放主被叫之间的原业务链路, 启用主被叫之间的新业务 链路。 实施例一, 一种切换的方法。 第一终端通过第一基站建立与第二终端的通 话, 第一终端与第二终端之间建立的通话链路为第一业务链路。
当第一业务链接建立后, 第一业务链路上的交换设备如果支持通用切换逻 辑, 则将自身的局向信息通过局向通知消息发送给第一终端。局向通知消息可 以是带内消息,也可以是带外消息。 第一业务链路上的交换设备也可以将自身 的局向信息通过局向通知消息发送给第二终端, 第二终端对局向信息的存储, 以及第二终端发起切换的方式与第一终端相同,在本实施例中,仅以第一终端 为例进行说明。 当第一业务链路上的交换设备将自身的局向信息发送给第一终端, 第一终 端存储第一业务链路上交换设备的局向信息。第一终端可以通过以下方式存储 局向信息:
1、 当第一业务链路上只有一个交换设备支持通用切换逻辑, 第一终端存 储该交换设备的局向信息。 2、 当第一业务链路上有多个交换设备支持通用切换逻辑, 第一终端可以 只存储一个交换设备的局向信息, 也可以存储多个交换设备的局向信息。
有多个交换设备支持通用切换逻辑时, 第一终端存储一个交换设备的局向 信息的方式包括:
存储一次通话或切换过程中最后到达的第一业务链路上交换设备的局向 信息; 或者,
存储一次通话或切换过程中最先到达的第一业务链路上交换设备的局向 信息; 或者,
在第一终端配置过程中, 配置了局向信息存储的规则, 按照该规则, 存储 对应的第一业务链路上交换设备的局向信息。
有多个交换设备支持通用切换逻辑时, 第一终端存储多个交换设备的局向 信息的方式包括:
按照一次通话或切换过程中第一业务链路上交换设备的局向信息的到达 次序, 顺序存储第一业务链路上交换设备的局向信息; 或者,
按照一次通话或切换过程中第一业务链路上交换设备的局向信息的到达 次序, 逆序存储第一业务链路上交换设备的局向信息; 或者,
在第一终端配置过程中,配置了局向信息存储的规则,按照该规则的次序, 对应存储第一业务链路上交换设备的局向信息。 第一终端在与第二终端通话的过程中, 移动到第二基站, 判断需要进行切 换, 则向第二基站发起新呼叫。 图 1所示为根据本发明实施例一的切换流程示意图。 图 2所示为本发明实 施例一方法的设备连接示意图。
为了描述方便, 将图 2中第二终端到第一业务链路上的交换设备之间实线 所表示的业务链路称为第一段业务链路,将第一业务链路上的交换设备与第一 终端之间实线所示的业务链路称为第二段业务链路,将第一业务链路上的交换 设备与第一终端之间虚线所示的业务链路称为第三段业务链路。 则图 2中, 第 一业务链路包括第一段业务链路以及第二段业务链路,第二业务链路包括第一 段业务链路以及第三段业务链路。
步骤 101、 第二基站所在网络的第一交换设备接收第一终端的呼叫请求, 呼叫请求中携带第一业务链路上交换设备的局向信息,呼叫请求指示的被叫为 第二终端。
呼叫请求中可以只携带一个第一业务链路上交换设备的局向信息, 也可以 携带两个或两个以上第一业务链路上交换设备的局向信息。 步骤 102、 第一交换设备根据呼叫请求, 向第一业务链路上的交换设备发 送建立链路请求 , 建立链路请求中携带第一终端和第二终端的地址信息。
根据本发明实施例提出的方法, 向第一业务链路上的交换设备发送建立链 路请求的方式包括:
当呼叫请求中只携带一个第一业务链路上交换设备的局向信息, 第一交换 设备向局向信息对应的第一业务链路上交换设备发送建立链路请求 ,若建立链 路成功, 则执行步骤 103; 若建立链路失败, 则第一交换设备拒绝此次呼叫, 终止第一终端的此次切换。
可选的, 若建立链路成功, 且第一交换设备支持通用切换逻辑, 则第一交 换设备将自身的局向信息发送给第一终端緩存,以备后续第一终端发起切换时 使用。 当呼叫请求中携带多个第一业务链路上交换设备的局向信息, 第一交换设 备根据呼叫请求,向局向信息中排第一位的局向信息对应的交换设备发送建立 链路请求; 若建立链路失败, 则第一交换设备继续向下一个局向信息对应的交 换设备发送建立链路请求, 直至建立链路成功, 执行步骤 103 ; 若无法建链成 功, 则第一交换设备拒绝此次呼叫, 终止第一终端的此次切换。
若无法建链成功,第一交换设备还可以按照普通呼叫模式根据第二终端目 的地址建立链路, 流程结束。 步骤 103、 第一业务链路上的交换设备根据建立链路请求, 建立与第一交 换设备之间的链路,第一业务链路上的交换设备将第一业务链路中自身与第一 终端之间的链路拆除,将第一业务链路中自身与第二终端之间的链路和自身与 第一交换设备之间的链路搭接, 建立第二业务链路。
可选的, 第一业务链路上的交换设备建立第二业务链路后, 第一业务链路 上的交换设备将自身的局向信息发送给第一终端緩存,以备后续第一终端发起 切换时使用。 第一终端对于緩存的第一交换设备的局向信息以及第一业务链路上的交 换设备的新的局向信息, 用以下方式处理:
当第一终端释放掉与第一业务链路上的交换设备之间的链路后, 或者当第 一终端接收切换完成指示后,存储第一交换设备的局向信息,将第一业务链路 上的交换设备的新的局向信息覆盖第一业务链路上的交换设备原来在第一终 端上存储的局向信息。
第一终端还要清除掉第一业务链路上, 第一终端与第一业务链路上的交换 设备之间的其它设备的局向信息。 实施例二, 一种交换设备, 用于第一终端与第二终端之间已经建立第一业 务链路的情况下的切换。 图 3所示为根据本发明实施例二的交换设备的结构示意图。 接收单元 301 , 用于接收第一终端的呼叫请求, 呼叫请求中携带第一业务 链路上交换设备的局向信息, 呼叫请求指示的被叫为第二终端;
链路单元 302 , 用于根据接收单元接收的呼叫请求, 向第一业务链路上的 交换设备发送建立链路请求,建立链路请求中携带第一终端和第二终端的地址 信息。
呼叫请求携带第一业务链路上多个交换设备的局向信息; 进一步的链路单 元包括:
发送子单元, 用于根据呼叫请求, 向局向信息对应的第一业务链路上的交 换设备发送建立链路请求; 判断子单元, 用于当发送子单元发送建立链路请求后, 判断建立链路是否 成功;
控制子单元, 用于当判断子单元判断建立链路失败, 生成控制指令, 控制 指令用于控制发送子单元向下一个局向信息对应的第一业务链路上的交换设 备发送建立链路请求, 直至建立链路成功。
该交换设备还包括:
发送单元, 用于当交换设备支持通用切换逻辑, 将交换设备的局向信息向 第一终端发送; 和 /或,
当交换设备支持通用切换逻辑, 将交换设备的局向信息向第二终端发送。 实施例三, 一种交换设备, 用于第一终端与第二终端之间已经建立第一业 务链路的情况下的切换。 图 4所示为根据本发明实施例三的交换设备的结构示意图。 接收单元 401 , 用于接收第一交换设备的建立链路请求, 建立链路请求中 携带第一终端和第二终端的地址信息;
链路单元 402 , 用于根据接收单元接收的建立链路请求, 建立交换设备与 第一交换设备之间的链路;
检查单元 403 , 用于根据接收单元接收的建立链路请求中的第一终端和第 二终端的地址信息, 检查连接关系表;
切换单元 404 , 用于当检查单元发现第一终端和第二终端之间已经建立第 一业务链路,根据链路单元建立的交换设备与第一交换设备之间的链路,将所 述第一业务链路中所述交换设备与所述第一终端之间的链路拆除,将所述交换 设备与所述第二终端之间的链路和所述链路单元建立的与所述第一交换设备 之间的链路搭接。
进一步的, 该交换设备还包括: 第一发送单元, 用于当切换单元将第一业务链路切换到第二业务链路后, 将交换设备的局向信息向第一终端发送。
进一步的, 该交换设备还包括:
第二发送单元, 用于当切换单元将第一业务链路切换到第二业务链路后, 将交换设备的局向信息向第二终端发送。 实施例四, 一种终端设备, 用于该终端设备已经与对端之间建立第一业务 链路的情况下的切换。 图 5所示为根据本发明实施例四的终端设备的结构示意图。 接收单元 501 , 用于接收第一业务链路上交换设备的局向信息; 判断单元 502 , 用于判断是否需要发起切换;
发送单元 503 , 用于当判断单元判断需要发起切换时, 向第一交换设备发 送呼叫请求,呼叫请求中携带接收单元接收的第一业务链路上交换设备的局向 信息, 呼叫请求指示的被叫为对端。
进一步的, 接收单元包括:
接收子单元, 用于接收第一业务链路上交换设备的局向信息;
存储子单元, 用于存储一次通话或切换过程中最后到达的第一业务链路上 交换设备的局向信息; 或者,
用于存储一次通话或切换过程中最先到达的第一业务链路上交换设备的 局向信息; 或者,
用于按照一次通话或切换过程中第一业务链路上交换设备的局向信息的 到达次序, 顺序存储第一业务链路上交换设备的局向信息; 或者,
用于按照一次通话或切换过程中第一业务链路上交换设备的局向信息的 到达次序, 逆序存储第一业务链路上交换设备的局向信息。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的硬件平台的方式来实现, 当然也可以全部通过硬件来实 施, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发明的技术方 案对背景技术做出贡献的全部或者部分可以以软件产品的形式体现出来,该计 算机软件产品可以存储在存储介质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若 干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备 等)执行本发明各个实施例或者实施例的某些部分所述的方法。
以上所述仅是本发明的具体实施方式,应当指出,对于本技术领域的普通 技术人员来说, 在不脱离本发明原理的前提下, 还可以作出若干改进和润饰, 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种切换方法, 第一终端与第二终端之间已经通过交换设备建立第一 业务链路, 其特征在于, 该方法包括:
第一交换设备接收所述第一终端的呼叫请求, 所述呼叫请求中携带所述第 一业务链路上的交换设备的局向信息,所述呼叫请求指示的被叫为所述第二终 端;
所述第一交换设备根据所述呼叫请求, 向所述第一业务链路上的交换设备 发送建立链路请求 ,所述建立链路请求中携带所述第一终端和第二终端的地址 信息;
所述第一业务链路上的交换设备根据所述建立链路请求, 建立与所述第一 交换设备之间的链路;
所述第一业务链路上的交换设备将所述第一业务链路中自身与所述第一 终端之间的链路拆除,将所述第一业务链路中自身与所述第二终端之间的链路 和自身与所述第一交换设备之间的链路搭接。
2、 根据权利要求 1 所述的切换方法, 其特征在于, 所述第一业务链路上 的交换设备至少为一个,所述呼叫请求中携带所述第一业务链路上至少为一个 的交换设备的局向信息, 当所述第一业务链路上的交换设备的个数大于 1时, 向所述第一业务链路上的交换设备发送建立链路请求包括:
所述第一交换设备向所述呼叫请求中排第一位的局向信息对应的所述第 一业务链路上的交换设备发送建立链路请求;
若建立链路失败, 则所述第一交换设备继续向下一个局向信息对应的所述 第一业务链路上的交换设备发送建立链路请求, 直至建立链路成功。
3、 根据权利要求 1所述的切换方法, 其特征在于, 该方法还包括: 当所述第一交换设备支持通用切换逻辑, 则所述第一交换设备将自身的局 向信息向所述第一终端或者所述第二终端发送。
4、 根据权利要求 1所述的切换方法, 其特征在于, 该方法还包括: 当所述第一业务链路上的交换设备支持通用切换逻辑, 则所述第一业务链 路上的交换设备将自身的局向信息向所述第一终端或者所述第二终端发送。
5、 根据权利要求 1 所述的切换方法, 其特征在于, 所述第一业务链路上 的交换设备将所述第一业务链路切换到第二业务链路后, 还包括: 所述第一业务链路上的交换设备将自身的局向信息向所述第一终端发送; 和 /或,
所述第一业务链路上的交换设备将自身的局向信息向所述第二终端发送。
6、 根据权利要求 1至 5任一项所述的切换方法, 其特征在于, 所述局向 信息为地址信息, 在全网唯一。
7、 一种交换设备, 其特征在于, 用于第一终端与第二终端之间已经建立 第一业务链路的情况下的切换, 该设备包括:
接收单元, 用于接收所述第一终端的呼叫请求, 所述呼叫请求中携带所述 第一业务链路上的交换设备的局向信息,所述呼叫请求指示的被叫为所述第二 终端;
链路单元, 用于根据所述接收单元接收的呼叫请求, 向所述第一业务链路 上的交换设备发送建立链路请求,所述建立链路请求中携带所述第一终端和第 二终端的地址信息。
8、 根据权利要求 7 所述的交换设备, 其特征在于, 所述呼叫请求携带所 述第一业务链路上至少一个交换设备的局向信息; 所述链路单元包括:
发送子单元, 用于根据所述呼叫请求, 向所述局向信息对应的所述第一业 务链路上的交换设备发送建立链路请求;
判断子单元, 用于当所述发送子单元发送建立链路请求后, 判断建立链路 是否成功;
控制子单元, 用于当所述判断子单元判断建立链路失败, 生成控制指令, 所述控制指令用于控制所述发送子单元向下一个局向信息对应的所述第一业 务链路上的交换设备发送建立链路请求, 直至建立链路成功。
9、 根据权利要求 7所述的交换设备, 其特征在于, 该设备还包括: 发送单元, 用于当所述交换设备支持通用切换逻辑, 将所述交换设备的局 向信息向所述第一终端发送; 和 /或,
当所述交换设备支持通用切换逻辑 , 将所述交换设备的局向信息向所述第 二终端发送。
10、 一种交换设备, 其特征在于, 用于第一终端与第二终端之间已经建立 第一业务链路的情况下的切换, 该设备包括:
接收单元, 用于接收第一交换设备的建立链路请求, 所述建立链路请求中 携带所述第一终端和第二终端的地址信息;
链路单元, 用于根据所述接收单元接收的所述建立链路请求, 建立所述交 换设备与所述第一交换设备之间的链路;
检查单元, 用于根据所述接收单元接收的建立链路请求中的第一终端和第 二终端的地址信息, 检查连接关系表;
切换单元, 用于当所述检查单元发现所述第一终端和第二终端之间已经建 立第一业务链路,将所述第一业务链路上的交换设备与所述第一终端之间的链 路拆除,将所述交换设备与所述第二终端之间的链路和所述链路单元建立的与 所述第一交换设备之间的链路搭接。
11、 根据权利要求 10所述的交换设备, 其特征在于, 该设备还包括: 第一发送单元, 用于当所述切换单元将所述第一业务链路切换到第二业务 链路后, 将所述交换设备的局向信息向所述第一终端发送。
12、 根据权利要求 10所述的交换设备, 其特征在于, 该设备还包括: 第二发送单元, 用于当所述切换单元将所述第一业务链路切换到第二业务 链路后, 将所述交换设备的局向信息向所述第二终端发送。
13、 一种终端设备, 其特征在于, 用于所述终端设备已经与对端之间建立 第一业务链路的情况下的切换, 该设备包括:
接收单元, 用于接收所述第一业务链路上交换设备的局向信息; 判断单元, 用于判断是否需要发起切换;
发送单元, 用于当所述判断单元判断需要发起切换时, 向第一交换设备发 送呼叫请求,所述呼叫请求中携带所述接收单元接收的所述第一业务链路上的 交换设备的局向信息, 所述呼叫请求指示的被叫为所述对端。
14、 根据权利要求 13所述的终端设备, 其特征在于, 所述接收单元包括: 接收子单元, 用于接收所述第一业务链路上交换设备的局向信息; 存储子单元, 用于存储一次通话或切换过程中最后到达的所述第一业务链 路上交换设备的局向信息; 或者,
用于存储一次通话或切换过程中最先到达的所述第一业务链路上交换设 备的局向信息; 或者,
用于按照一次通话或切换过程中所述第一业务链路上交换设备的局向信 息的到达次序, 顺序存储所述第一业务链路上交换设备的局向信息; 或者, 用于按照一次通话或切换过程中所述第一业务链路上交换设备的局向信 息的到达次序, 逆序存储所述第一业务链路上交换设备的局向信息。
PCT/CN2008/073215 2007-12-13 2008-11-27 切换方法、交换设备及终端设备 WO2009076833A1 (zh)

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