21st International Conference on Advanced Information Networking and Applications (AINA '07) (2007)
Niagara Falls, Ontario, Canada
May 21, 2007 to May 23, 2007
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/AINA.2007.48
Eunchul Cha , Information and Communication University, Korea
Kyounghee Lee , Electronics and Telecommunications Research Institute, Korea
Myungchul Kim , Information and Communication University, Korea
The Session Initiation Protocol (SIP), standardized by the IETF, allows participants to establish a session for delivering multimedia streams such as audio and video. However, when it comes to mobile environment, SIP fails to offer seamless real-time multimedia service due to significant handoff delay caused by IP address allocation and session re-establishment. A common disadvantage of the existing approaches is that they require additional network components or considerable interventions of network administrators. In this paper, we propose a fast handoff mechanism for SIP, which employs the cross-layer inter-working technique to reduce the handoff delay. The proposed mechanism, called Cross-Layer Fast Handoff for SIP (CF-SIP), proactively performs the IP address reservation and SIP session update by using link layer information of underlying wireless networks. Experimental results from our implementation show that CF-SIP can support the real-time multimedia services in wireless/mobile networks with only few modifications to existing networks. The practicability of CF-SIP is also demonstrated through its application to VoIP and H.263 video streaming.
E. Cha, K. Lee and M. Kim, "Cross Layer Fast Handoff for SIP," 21st International Conference on Advanced Information Networking and Applications (AINA '07)(AINA), Niagara Falls, Ontario, Canada, 2007, pp. 443-450.