Running Variance Metric for Evaluating Performance of Wireless IP Networks in the MobileCity Testbed
TRIDENTCOM '05 Proceedings of the First International Conference on Testbeds and Research Infrastructures for the DEvelopment of NeTworks and COMmunities
Optimization of SIP Session Setup Delay for VoIP in 3G Wireless Networks
IEEE Transactions on Mobile Computing
Voice over wireless local area network
IEEE Wireless Communications
A quality-aware VoWLAN architecture and its quantitative evaluations
IEEE Wireless Communications
IEEE Communications Magazine
A new MIP-SIP interworking scheme
Proceedings of the 7th International Conference on Mobile and Ubiquitous Multimedia
Service migration protocol for NFC links
EUNICE'10 Proceedings of the 16th EUNICE/IFIP WG 6.6 conference on Networked services and applications: engineering, control and management
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In this paper we look at the signaling for session mobility using the Session Initiation Protocol (SIP) and the Session Description Protocol (SDP). Bearing in mind that perceived voice quality is sensitive mostly to delay variation (also called jitter), we work on bounding that value for providing a better voice Quality of Service over Wireless LAN (WLAN). For mobility we use a hybrid SIP-MIP stack. The basic idea is to combine the strengths of MIP for doing fast handovers and the strengths of SIP for powerful session adaptation capabilities. Numerical calculation figures as well as real implementation results are provided. It can be observed that the session update cycle during mobility can be modified in such a way that session delay variation bounds achieved are quite low and there are almost no spikes. We use composite performance metrics that we defined in previous work to analyze the correlation between the data patterns for session signaling delay in the classical case and our proposed case to better highlight the achieved performance delta.