基于名字映射和解析系统的多RP组播  

Multi-RP multicast based on name mapping and resolution system

作　　者：李博 王劲林[1,2] 朱小勇 胡琳琳[1] LI Bo;WANG Jinlin;ZHU Xiaoyong;HU Linlin(National Network New Media Engineering Research Center,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《电子设计工程》2022年第20期13-17,22,共6页Electronic Design Engineering

基　　金：中国科学院战略性科技先导专项课题(XDC02070100)。

摘　　要：大量以信息为中心的应用使得组播再次受到关注。基于共享树的组播方法相较于基于源树的组播方法能够有效地减少组播转发状态,但仍存在一些问题,如RP管理复杂、RP负载过大、传输时延高和流量汇聚等。基于此,文中提出了一种基于名字映射和解析系统(NMRS)的多RP组播方法。针对RP管理复杂和过载问题,所提方法将所有路由器都作为候选RP,并使用NMRS管理候选RP以实现负载均衡。针对时延过高的问题,所提方法使用现场名字映射和解析服务维护局部源信息并为局部的源选择最近的RP,每个组播组建立多个以不同RP为根的共享树。实验结果表明,相较于现有基于共享树的方法,所提的组播方法在仅增加部分组播转发状态的同时能够有效减少RP负载、传输时延和流量汇聚。With the emergence of a large number of information-centric applications,multicast has attracted much attention again. Compared with the multicast methods based on the source-based tree,the multicast methods based on the shared tree can effectively reduce the multicast forwarding state,but there are still some problems,such as complex RP management,excessive RP load,high transmission delay and traffic aggregation,etc. Therefore,this paper proposes a multi-RP multicast method based on Name Mapping and Resolution System(NMRS). For RP management complexity and RP overload,the proposed method regards all routers as candidate RPs,and use NMRS to manage candidate RPs to achieve load balancing. For high latency,the proposed method uses local name mapping and resolution services to maintain local source information and select the nearest RP for local sources. Each multicast group establishes multiple shared trees rooted at different RPs. The experimental results show that compared with the existing methods based on shared trees,the proposed multi-RP multicast method can effectively reduce the RP load,transmission delay and traffic aggregation while only increasing some multicast forwarding states.

关 键 词：组播 Rendezvous Point 信息中心网络 负载均衡 

分 类 号：TN919[电子电信—通信与信息系统]