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Simulated performance of VoIP using DCCP CCID2 over large delay link networks

Awang Nor, Shahrudin and Hassan, Suhaidi and Almomami, Omar (2008) Simulated performance of VoIP using DCCP CCID2 over large delay link networks. In: International Conference on Network Applications, Protocols, and Services 2008 (NetApps 2008), 21-22 November 2008, Executive Development Centre (EDC) Universiti Utara Malaysia. Universiti Utara Malaysia, pp. 1-7. ISBN 9789832078333

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DCCP is gaining popularity as a new transport protocol for sending streaming multimedia contents in the Internet nowadays. As it is a new unreliable transport protocol which has built-in congestion control, DCCP ensures that there is no bandwidth monopoly by certain transport protocol.UDP has been proven that can eat up all the available bandwidth in the Internet while competing with other transport protocols such as TCP in carrying streaming audio and multimedia traffic in many situations. In this paper, we show that the performance of VoIP using DCCP is significantly affected by the size of initial slow-start threshold (ssthresh) over large delay links. All TCP congestion control implementations are required to support slow-start threshold implemented in DCCP’s TCP-like congestion control (CCID2). From our experiments, we found out that too small initial slow-start threshold value for large delay link makes the traffic throughput sent using DCCP requires longer time to become stable. The selection of suitable value of initial slow-start threshold is then vital for the performance of VoIP using DCCP over large delay link networks.

Item Type: Book Section
Additional Information: Organized by Universiti Utara Malaysia, technical sponsor: IEEE Computer Society, Malaysia Section
Uncontrolled Keywords: VoIP, DCCP, slow-start threshold, TCP-like
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: College of Arts and Sciences
Depositing User: Prof. Ts. Dr. Suhaidi Hassan
Date Deposited: 20 Feb 2011 07:50
Last Modified: 20 Feb 2011 07:50

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