The case for services over cascaded networks

The widespread deployment of wired md wirdess networks in both hotiont d md vertid overlays presents new OP portunities and ddenges for devdopers of servic=. Users of these networks have mdtiple end devicw, some of whi& are mobde, whi~ compfi~tes (and sometimes prevents) the transparent use of servica ~oss the networks. This paper presents an artite~e for enabbg the dynamic handoff of dive services moss mdtiple networks (stied networks). The artitetie supports the rapid devdopment of inno~ative new servicw ad enabl~ the use of stic~ ad user-spetic po~ties for -coding and routing information between networks. These pofities dow services to determine the %est” mode and route to use in r-g a partitiar user. The artitetie destibed in this paper is being btit on top of a wpwwide testbed consisting of GSII digitd c~tiar, wirdess and wired E, and pubfic switched tdephone networks. An example appfimtion has been construtied to demonstrate the utfity of the artitecture.