By Topic

Enhancing the radio link protocol for VoIP session establishment signalling over satellite-UMTS

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
V. Y. H. Kueh ; Centre for Commun. Syst. Res., Surrey Univ., Guildford, UK ; R. Tafazolli ; B. Evans

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 UMTS, there is a need to support SIP-based session establishment over satellite-UMTS (S-UMTS) 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 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 satellite. As such, the paper proposes an enhancement to the RLC protocol through a timer-based retransmission scheme. Simulation results reveal that not only can the system capacity be improved through this redundant retransmission avoidance scheme, but also better system performances, in terms of session setup delay and failure, are gained.

Published in:

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th  (Volume:5 )

Date of Conference:

17-19 May 2004