Integration Of UMTS And B-ISDN: Is It Possible Or Desirable?

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Term Paper Title	Integration Of UMTS And B-ISDN: Is It Possible Or Desirable?
# of Words	1950
# of Pages (250 words per page double spaced)	7.8

Integration Of UMTS And B-ISDN: Is It Possible Or Desirable?

Integration Of UMTS And B-ISDN: Is It Possible Or Desirable?

INTRODUCTION

In the future, existing fixed networks will be complemented by mobile networks
with similar numbers of users. These mobile users will have identical
requirements and expectations to the fixed users, for on-demand applications of
telecommunications requiring high bit-rate channels. It will be necessary for
these fixed and mobile networks to interoperate in order to pass data, in real
time and at high speeds, between their users.

But how far must this interoperation be taken? How much integration of the fixed
and mobile network structures is needed? Here, a fixed network, B-ISDN, and a
mobile network, UMTS, under development at the same time, are examined to see
how well and closely they should work together in order to meet expected user
needs. Work already taking place on this is discussed.

BACKGROUND

The Universal Mobile Telecommunication System (UMTS), the third generation of
mobile networks, is presently being specified as part of the European RACE
technology initiative. The aim of UMTS is to implement terminal mobility and
personal mobility within its systems, providing a single world mobile standard.
Outside Europe, UMTS is now known as International Mobile Telecommunications
2000 (IMT2000), which replaces its previous name of Future Public Land Mobile
Telecommunication System (FPLMTS). [BUIT95]

UMTS is envisaged as providing the infrastructure needed to support a wide range
of multimedia digital services, or teleservices [CHEU94], requiring channel bit-
rates of less than the UMTS upper ceiling of 2 Mbits/second, as allocated to it
in the World Administrative Radio Conference (WARC) '92 bands. UMTS must also
support the traditional mobile services presently offered by separate networks,
including cordless, cellular, paging, wireless local loop, and satellite
services. [BUIT95] Mobile teleservices requiring higher bit rates, from 2 to 155
Mbits/second, are expected to be catered for by Mobile Broadband Services (MBS),
the eventual successor to UMTS, which is still under study. [RACED732]

Broadband Integrated Services Digital Network (B-ISDN), conceived as an all-
purpose digital network that will supersede Narrowband ISDN (N-ISDN or ISDN), is
also still being specified. B-ISDN, with its transport layer of Asynchronous
Transfer Mode (ATM) is expected to be the backbone of future fixed digital
networks. [MINZ89]
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