IMPROVEMENT OF CHORD OVERLAY FOR P2PSIP-BASED COMMUNICATION SYSTEMS
Titel:
IMPROVEMENT OF CHORD OVERLAY FOR P2PSIP-BASED COMMUNICATION SYSTEMS
Auteur:
Xianghan Zheng Vladimir Oleshchuk
Verschenen in:
International journal of computer networks & communications
Paginering:
Jaargang 1 (2009) nr. 3 pagina's 133-142
Jaar:
2009
Inhoud:
Chord has been suggested by IETF P2PSIP working group as mandatory overlay technology in the futureP2PSIP-based communication systems. Chord allows for the available peer/resource lookup in no morethan log N hops, where N is the total number of the peers in the overlay network. However, as aprotocol originally designed for background downloading applications, Chord has a few drawbackswhen supporting P2PSIP real-time communication systems. These drawbacks are related to IDassignment, the relation between ID and physical location, the routing styles and lack of cache, etc. Inthis paper, we investigate several approaches that can improve the efficiency of the peer/resource lookupalgorithm. After that, we first use the formal verification to check the correctness of the proposed Bi-Chord and Recursive routing approaches, and then implement two systems with 512 P2PSIP peers(Chord-based and improved Chord based P2PSIP communication systems) for evaluation. Theevaluation includes number of hops, message flows, and practicality from theoretical point of view, andthe comparison of the delay in two systems according to the measurement. We get the conclusion that thecombination of Bi-Chord, Cache entry record, and Semi-Recursive routing is most suitable for P2PSIPbasedcommunication systems. Finally, we include the conclusions and future work.
Uitgever:
Academy & Industry Research Collaboration Center (provided by DOAJ)
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