The IP datacast system - overview and mobility aspects

Abstract

~ Both cellular communications netwnrk.s and hroailcast networks have inherent limitations ThereJbre neitlrer. of them is ideal for the variety af semice.s which cirstoniers will expect in the jirture. On the other hand. the cunihination of hoth netuurks w~liich we will call l?vhrid netiwrks will be ahle to accoinrnodate practically all conceivable kinds of services. This paper shoiis /IOW IP Datacast. a svstem ,just heiug specifjed by the DVB Project. will provide u,fiame*orkJor hvbrid networks incorporating a DVB-H (Digital Video Bt~adcasting-Handllel~ point-tomultipoint downstream and a GPRS or UMTS cellular communications netnork. The ad-hoc group CBMS (Convergence ufBroadcast and Mohile Services) ofthe DVB Project's Technical Modtile is working on the IP Datacast spectlication. This paper descrihes the current activities U / CBMS and present.s the contributions of the author to IP Datacast '. lndcx Terms DVB-H, IP Datacast, hybrid network