多径中继传输系统网络仿真设计与实现

摘要 基于应用层中继的多径传输系统(MPTS-AR)是一种基于应用层中继的多径传输系统,通过基于用户数据报协议的中继服务器构建端到端的多径传输条件,并可支持多种业务实现多径传输. 提出基于OMNeT++平台上的INET Framework实现MPTS-AR网络仿真的方法,包括用户代理、中继服务器和中继控制器等网络逻辑实体的二次开发方法、相关网络链路和网络拓扑的构建方法、消息定义与处理方法等;讨论了应用程序接口兼容和多业务支撑等重难点技术. 最后,通过H.264业务传输实例验证了所设计MPTS-AR网络仿真的正确性和有效性.
Multipath transport system based on application-level relay (MPTS-AR) is a multipath transport system model based on application-level relay. It uses user datagram protocol relay server to establish multiple paths for point-to-point session and supports multiple services. A method was proposed to create MPTS-AR network simulation basing on INET Framework of OMNeT++ platform, including how to create network topology, to implement logical entities (user agent, relay controller, relay server), and to define and process messages. The key and difficult points about application program interface compatibility and supporting multi-service were also discussed. H.264 service based simulation was carried out. It is shown the correctness and effectiveness of MPTS-AR network simulation.