Dong Lim Lee, Chan Hyun Youn

The KIPS Transactions:PartC, Vol. 8, No. 1, pp. 60-67, Feb. 2001
10.3745/KIPSTC.2001.8.1.60,   PDF Download:

Abstract

Multicast Protocol for multimedia service on the Internet can be classified into two types, e.g., source based tree and shared tree according to difference of tree construction method. Shared tree based multicast is known to show outstanding results in the aspect of scalability than source based tree. Generally, There have been lots of researches on the method to satisfy QoS constraints through proper Rendezvous Point (RP) in the shared tree. In addition, as the multicast group members join and leave dynamically in the service time, RP of the shared tree should be reselected for guranteeing Qos to new member, But, RP reselection method has not been considered generally as the solution to satisfy QoS constraints. In this paper, new initial RP selection and RP reselection method are proposed, which utilize RTCP (Real Time Control Protocol) report packet fields. Proposed initial RP selection and RP reselection method use RTCP protocol which underlying multimedia application service. So, the proposed method does not need any special process for collecting network information to calculate RP. New initial RP selection method shows better performance than random and topology based one by 40~50% in simulation. Also, RP reselection method improves delay performance by 50% after initial RP selection according to the member's dynamicity.

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