Enhancing the Radio Link Protocol for VoIP Session Establishment Signalling Over Satellite-UMTS
Kueh, Victor Y H, Tafazolli, Rahim and Evans, Barry (2004) Enhancing the Radio Link Protocol for VoIP Session Establishment Signalling Over Satellite-UMTS In: 2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514).
Session Initiation Protocol (SIP) is an application layer signalling protocol used in the IP-based UMTS network for establishing multimedia sessions. With a satellite component identified to play an integral role in UNITS, there is a need to support SIP-based session establishment over Satellite-UMTS (SUNITS) as well. Due to the inherent characteristics of SIP, the transport of SIP over an unreliable wireless link with a larger propagation delay is inefficient. To improve the session setup performance, a link layer retransmission based on the Radio Link Control acknowledgement mode (RLC-AM) mechanisms is utilised. However the current UMTS RLC-AM procedure is found to cause undesirable redundant retransmission when applied over the satellite. As such, this paper proposes an enhancement to the RLC protocol through a timer-based retransmission scheme. Simulation results reveal that not only the system capacity can be improved through this redundant retransmission avoidance scheme, but also better system performances in terms of session setup delay and failure are gained.
|Item Type:||Conference or Workshop Item (UNSPECIFIED)|
|Additional Information:||Kueh, V. Y. H., Tafazolli, R., and Evans, B. (2004) Enhancing the Radio Link Protocol for VoIP Session Establishment Signalling Over Satellite-UMTS.Proceedings of the IEEE 59th Vehicular Technology Conference,Vol. 5, pp. 2787-2791. ©2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
|Divisions:||Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research|
|Deposited By:||Mr Adam Field|
|Deposited On:||27 May 2010 15:44|
|Last Modified:||26 Sep 2012 14:31|
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