Design of the Session Layer Gateway Supporting Mobile, Delay and Disconnection Tolerant Communication

Today mobility within Internet is rather regarded as a problem instead of as a fact. The term mobility is also somewhat dubious with no standard de nition. Mobility is, in our view, not just the physical mobility of a laptop but even the move of a directory from one computer to another. Mobility has evolved but Internet has not followed in the same pace. To deal with the lack of mobility in Internet we introduce a gateway supporting a new kind of entity, endpoints. An endpoint can be a user, content, an application and they have their own naming system. With a name server allowing real-time update of ip addresses of endpoints these endpoints can be moved from one computer in one network to another computer in another network. It is here that a session layer gateway is needed. Not all networks are of the same address scheme, there are both IPv4 networks and IPv6 networks today, and there are private IPv4 net-works using Network Address Translation. The communication betwee