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next generation mobile communication
systems under development at ITU and ETSI (one of GSM study groups) |
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European project is Universal Mobile
Telecommunication System (UMTS), while ITU project is called International
Mobile Telecommunications 2000 (IMT-2000), formerly known as Future Public
Land Mobile Telecommunication System (FPLMTS) |
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time horizon: basic standards by 2000,
commercialization by 2005, “life” expectancy beyond 2025 |
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mobile access part of future Broadband
ISDN network |
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service objectives |
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broad range of customizable
telecommunication services up to 2 Mbps, subset of B-ISDN |
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support Universal Personal
Telecommunications (UPT), fixed network service for personal mobility,
allowing registration and deregistration at any terminal |
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support wide range of terminal types |
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support public and private environments |
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operation in, and roaming between,
different operating environments |
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sparse, rural, suburban, urban |
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indoor/outdoor |
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residential/business |
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pedestrian/vehicular |
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provide integrated satellite component |
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combine range of existing wireless
systems (cellular, cordless, mobile data, paging) to share infrastructure
costs and harmonize services |
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allow flexible and rapid creation of
new services |
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efficient usage of spectrum resources |
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enable provision of wireless local loop |
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ITU-R TG 8/1: Radio |
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spectrum allocation: at WARC-92, set
aside 1885-2025 and 2110-2220 MHz bands worldwide for terrestrial &
satellite, lower band pretty much free in Europe and Japan, used in China for
CDMA and WLL, used in North America for PCS ...... |
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satellite component |
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technology evaluation & choice |
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interface specification |
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ITU-T SG 11 (lead), 2, 7, 13, 16:
Network |
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services, numbering, charging |
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switching, signaling, protocols |
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security |
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operation & management |
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performance |
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Regional activities (North America,
Europe, and Asia/Pacific), submit standard proposals |
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Each region has own unique history,
existing systems, etc., so likely outcome of IMT-2000 activities is a “family
of standards”, assuring air-interface and network standards interoperability |
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Time schedule for radio specifications: |
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February 1997: request for candidate
radio transmission technologies |
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April 1998: cut-off for submissions to
U.S. TG 8/1 |
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July 1998: cut-off for submissions of
candidate proposal to ITU-R |
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March 1999: TG 8/1 determines key
characteristics of IMT-2000 radio interface |
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December 1999: TG 8/1 completes
development of radio interface specifications |