An ENriched MEdia application utilizing context for session mobility in a telecom system

摘要

Purpose - In many settings, the users are mobile (e.g. away from their desks) while high qualityrnmultimedia telephony equipment has fixed locations. This may result in unsuccessful multimediarncalls and motivates a context aware system which supports session mobility. This paper aims tornaddress these issues.rnDesign/methodology/approach - The approach is to utilize state-of-the-art in-context awarenessrnand integrate this into a real time telecom system based on SIP. System requirements are formulatedrnand the system is designed, implemented and (technically) tested.rnFindings - The paper contains a thorough analysis of why baseline SIP and SIP REFER alonerncannot solve our case and why a new SIP extension is introduced. The solution is evaluated andrncompared to solutions such as "virtual terminals".rnResearch limitations/implications - It is pointed out that the context model does not directlyrnsupport roaming between two different business domains. This issue is however of limited impact inrnan enterprise setting. The current prototype is thoroughly tested from a technical viewpoint, but userrnstudies in real organizations are recommended as further work.rnPractical implications - The paper shows that human issues and issues relating to computerrnmediated communication (CMC) are strongly linked to technical details in SIP. In practice this meansrnthat researchers in CMC and CSCW should look more into building prototypes where real timernconversational features are supported together with dynamic change of media types.rnOriginality/value - The main value of the paper is a thorough described technical realization of therncontext aware multimedia application ENriched MEdia (ENME). The background material and thernappendix should be of value to anyone interested in convergence between computing andrncommunication.