Telecommunications – Transmitter and receiver at separate stations
Patent
1994-01-24
1996-08-20
Faile, Andrew
Telecommunications
Transmitter and receiver at separate stations
455 334, 455 561, H04Q 736
Patent
active
055488064
ABSTRACT:
A mobile communication system has a cell structure constituted by integrating macro cells and micro cells, and at least one mobile station. The cell structure is made to cover a service area by a plurality of the micro cells each having a predetermined size and to cover the same service area by the single macro cell having a larger size than the size of the micro cell. Each of the micro cells includes a micro cell base station for transmitting at least radio control channel at a predetermined frequency and slot. The mobile station includes a measuring unit for repeatedly measuring received level of the radio control channels from the micro cell base stations, an estimation unit for estimating its moving speed in accordance with changing rate of the measured level, and a determining unit for determining, in accordance with the estimated moving speed, that control of a radio link between the mobile station and the base station is executed by a micro cell unit or by a macro cell unit. In one aspect, the macro cells may be virtual macro cells each of which is a virtually treated area covered by a plurality of the micro cells. If the repeatedly arranged virtual macro cells are formed as a layer and also multi-layered so that the service area is closely covered, the spectrum efficiency can be more increased.
REFERENCES:
patent: 5396645 (1995-03-01), Huff
"Third Generation Wireless Information Networks", ISBN 0-7923-9218-3, published by Kluwer Academic Publishers, pp. 12 and 13.
"Mobile Cellular Telecommunication System", ISBN 0-07-037030-3, published by McGraw-Hill Inc., pp. 269 to 282.
ITU-RS (CCIR)TG8/1 Document 8-1/TEMP/85(Rev.1)-E, pp. 13 to 20.
"Wireless Communication Future Direction", ISBN 0-7923-9316-3, published by Kluwer Academic Publishers, pp. 16 to 21.
"Dynamic Channel Assignment Using Subcarrier Multiplexing Techniques In Microcellular Systems", IEEE Vehicular Technology Society 42nd VTS Conference, H. Ichikawa et. al., pp. 645 to 648.
"Mobile Cellular Telecommunication System", ISBN 0-07-037030-3, published by McGraw-Hill Inc., pp. 245 to 265.
Kobayashi Hideo
Mizuno Toshio
Yamaguchi Akira
Faile Andrew
Kokusai Denshin Denwa Co. Ltd.
Le Thanh
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