基于Android的SIP软电话的设计与实现

摘要

In view of the widely used of Android operating system and VoIP technology fused in mobile communication,by the analysis of the structure of SIP protocol and the fr(a)mework of Android platform,the SIP soft phone model is established based on the Android platform.With the help of modular design idea and low coupling interaction,the SIP soft phone function module is designed.By the use of Java programming language,the development of SIP soft phone signal control,audio and video acquisition,media session management and other core function module is realized by using SIP for call control protocol based on the Socket specification.The test platform is built based on the XE200 voice server of H3C and verified the function of SIP soft phone,the quality of voice call,signal processing time,jitter and packet loss rate and other performance indicators are test and analyzed by using ClearSight network analyzer.The test results show that the software runs stably,meets the needs of IP communication and reaches the expected design goal.%针对Android操作系统的广泛使用和VoIP技术在移动通信中的融合,通过分析SIP协议结构和Android平台架构,建立了基于Android平台的SIP软电话模型.采用模块化设计思想和低耦合的交互方式,设计了SIP软电话的功能模块.基于Socket规范,以SIP为呼叫控制协议,使用Java实现了SIP软电话的信令控制、音视频采集和媒体会话管理等核心功能模块的开发.基于H3C的XE200语音服务器搭建测试平台,验证了SIP软电话的功能,并使用ClearSight网络分析仪测试和分析了SIP软电话的语音通话质量、信令处理时间、抖动和丢包率等性能指标.测试结果表明该软件运行稳定,满足IP通信需求,达到了预期设计目标.