Disconnection tolerance for SIP-based real-time media sessions

Mobile users may experience short disruptions and premature call terminations (not just) when moving while engaged in a (multimedia) conversation. While much emphasis is put on enabling seamless mobility, recovery in case of (temporary) service failures has received little attention. In this paper, we explore the technical aspects of disconnection tolerance mechanisms for SIP-based mobile communications. We present standards-compliant detection and recovery mechanisms, provide a brief experimental evaluation based upon packet traces, and report on our prototype implementation.

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