MobSIP: A SIP extension to support application layer handover in realtime multimedia communications with mobility requirements

Abstract

In real-time multimedia, the overall time in Internet communications must be low and constant, in order to keep real-time sense and received media quality. When mobility is a basic requirement, efficient and flexible solutions should be adopted, avoiding harming time sensitive applications. In order to support real-time multimedia communications with mobility requirements on Internet backbones, a novel SIP extension is proposed, adding direct support to handover procedures in SIP clients. The procedures of that new extension, MobSIP, are specified and implemented, allowing formal and experimental verifications.

Keywords: SIP, application layer mobility, handover procedures, real-time multimedia.