一种分层结构与快速切换的可靠移动组播方案  

Reliable Mobile Multicast Scheme with Hierarchical Architecture and Fast Handover Capability

作　　者：刘宏月[1] 马建峰[1] 杨凯[1] 

机构地区：[1]西安电子科技大学计算机网络与信息安全教育部重点实验室,西安710071

出　　处：《应用科学学报》2011年第5期453-458,共6页Journal of Applied Sciences

基　　金：国家科技重大专项基金(No.2011ZX03005-002);国家自然科学基金(No.60872041;No.61072066);中央高校基本科研业务费项目基金(No.JY10000903001;No.JY10000901034);陕西省教育厅专项科研计划项目基金(No.09JK731;No.2010JK820)资助

摘　　要：移动IP组播技术能有效缓解移动环境的资源受限问题,但同时也面临许多挑战.文中提出了一个基于分层结构和快速切换的可靠移动组播方案(reliable mobile multicast scheme with hierarchical architecture and fasthandover capability,MMHFH),该方案综合运用微移动和链路层触发技术,针对切换过程中的组播开销、切换延迟、切换丢包、同步丢失、可扩展性以及路由影响等移动特性进行优化设计.OPNET仿真实验表明,MMHFH方案具有组播树稳定、组播维护开销小、切换延迟短、切换丢包少、可靠性高、可扩展性好、组播包传送效率高等特点.Although mobile IP multicast can adapt to scarce resource in wireless networks, it faces many technical challenges. A reliable mobile multicast scheme with a hierarchical architecture and fast handover capability （MMHFH） is proposed in this paper. MMHFH integrates micro-mobility and link-layer trigger methods, and emphasize on the mobile characteristics such as multicast maintenance overhead, handover latency, handover packet loss, out-of-synchronization, scalability and route stability. Results of simulation in an OPNET modeler show that MMHFH is an effective and reliable scheme with a more stable multicast distribution tree, less multicast maintenance overhead, shorter handover latency, lower packet loss rate, higher reliability, better scalability and higher multicast packet delivery efficiency.

关 键 词：IP网络 移动组播 分层结构 快速切换 链路层触发 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]