摘要： 会话初始化协议(SIP)作为VoIP的主流会话控制协议，基本功能相对简单，不能满足无线列调核心业务的强拆需求。针对该问题，提出WiMAX网络环境下基于SIP协议的无线列调系统结构，对SIP协议消息类型和事务进行扩展，设计信令流程，并给出SIP客户端与服务端的扩展实现方案。实验结果表明，该方案满足铁路强拆通话建立的时间要求，可以成功实现强拆。
关键词:
WiMAX网络,
会话初始化协议,
无线列调,
强拆,
会话控制
Abstract: Session Initiation Protocol(SIP), as a core session control protocol of VoIP, its base functions are a bit simple. It can not meet the needs of force disconnect which is a core business of wireless train dispatching system. To the question above, this paper provides the architecture of the wireless railway dispatching system under the environment of WiMAX, extends the SIP message methods and transactions, designs the signaling process of new SIP message method, and provids the extension scheme on the client side and server side. Experimental results show that this scheme can meet the establishing time requirement of force disconnect on railway, and can realize force disconnect successfully.
Key words:
WiMAX,
Session Initiation Protocol(SIP),
wireless train dispatching,
force disconnect,
session control
中图分类号:
谢楠, 刘真, 李红辉, 江苑. WiMAX下的列调强拆SIP扩展方案[J]. 计算机工程, 2013, 39(3): 7-11.
XIE Nan, LIU Zhen, LI Gong-Hui, JIANG Yu. SIP Extension Scheme of Train Dispatching Force Disconnect on WiMAX[J]. Computer Engineering, 2013, 39(3): 7-11.