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Network Technologies for IMT-2000
Akihisa Nakajima 에스케이텔레콤 (주) 1997 Telecommunications Review Vol.7 No.4
In Japan, the number of cellular subscribers is growing explosively. This will result in a radio bandwidth shortage by the year 2000. Also, mobile data communications have been growing as an essential service in society. To overcome the insufficient network capacity and realize multimedia services, NTT DoCoMo is carrying out network development for International Mobile Telecommunications 2000 (IMT-2000), formerly known as Future Public Land Mobile Telecommunication Systems (FPLMTS) [1],[2]. To realize the IMT-2000 network, a number of studies and standardization activities are being carried out in diverse areas. Functional network models and reference models, an ATM transmission technique for asymmetrically handling data at a wide range of speeds, including low-bit-rate mobile voice data, and signalling protocols supporting various services, are being discussed and standardized. This paper clarifies requirements and introduces these network technologies for use in the IMT-2000 network.