Integration Of Umts And B-isdn: Is It Possible Or Desirable? :: essays research papers

Integration Of UMTS And B-ISDN Is It Possible Or Desirable?INTRODUCTIONIn the future, existing stock-still networks will be complemented by mobile networkswith similar numbers of users. These mobile users will have identicalrequirements and expectations to the fixed users, for on-demand applications oftelecommunications requiring high bit-rate channels. It will be needed forthese fixed and mobile networks to interoperate in order to pass data, in realtime and at high speeds, between their users.But how far must this interoperation be taken? How much integration of the fixedand mobile network structures is needed? Here, a fixed network, B-ISDN, and amobile network, UMTS, infra development at the said(prenominal) time, are examined to seehow well and closely they should work together in order to meet expected userneeds. Work already taking browse on this is discussed.BACKGROUNDThe Universal agile Telecommunication System (UMTS), the third generation ofmobile networks, is present ly cosmos specified as part of the European RACEtechnology initiative. The aim of UMTS is to implement terminal mobility andpersonal mobility within its systems, providing a single world mobile standard.Outside Europe, UMTS is now known as International Mobile Telecommunications2000 (IMT2000), which replaces its previous name of Future Public Land MobileTelecommunication System (FPLMTS). BUIT95UMTS is envisaged as providing the infrastructure needed to support a wide rangeof multimedia digital services, or teleservices CHEU94, requiring channel bit-rates of less than the UMTS upper ceiling of 2 Mbits/second, as allocated to itin the World administrative Radio Conference (WARC) 92 bands. UMTS must alsosupport the traditional mobile services presently offered by separate networks,including cordless, cellular, paging, wireless local loop, and satelliteservices. BUIT95 Mobile teleservices requiring higher bit rates, from 2 to 155Mbits/second, are expected to be catered for by Mobile Br oadband Services (MBS),the eventual successor to UMTS, which is still under study. RACED732Broadband Integrated Services Digital Network (B-ISDN), conceived as an all-purpose digital network that will supersede Narrowband ISDN (N-ISDN or ISDN), isalso still being specified. B-ISDN, with its transport layer of AsynchronousTransfer Mode (ATM) is expected to be the backbone of future fixed digitalnetworks. MINZ89It is anticipated that, by the year 2005, up to 50% of all communicationterminals will be mobile. CHEU94 The Mobile Green Paper, issued by theEuropean Commission in 1994, predicts 40 million mobile users in the EuropeanUnion by 2000, rising to 80 million by 2010. This gives mobile users animportance ranking alongside fixed-network users. BUIT95One result of this growth in mobile telecommunications will be the increase inteleservice operations that originate in either the fixed or mobile network, but