An implementation of enhanced all-SIP mobility

In recent years, adding mobility technology to heterogeneous access networks has become important due to the growth and diversification of broadband access networks. For the simple and easily realization of seamless mobility in heterogeneous access networks, our previous paper proposed the All-SIP mobility architecture; it uses only SIP components in order to maintain both TCP and UDP communication sessions in heterogeneous access networks, but it was limited to only a few major TCP applications. This paper presents the enhanced All-SIP (eAll-SIP) mobility architecture which utilizes UDP encapsulation to suit all TCP applications; evaluation results of a prototype system including application programs are presented.