Telecommunications – Transmitter and receiver at separate stations
Patent
1981-06-22
1982-10-19
Bookbinder, Marc E.
Telecommunications
Transmitter and receiver at separate stations
455 52, 455 56, H04B 360, H04B 706, H04B 1500
Patent
active
043554113
ABSTRACT:
The present invention relates to a technique for efficient spectrum utilization in mobile radio systems divided into a plurality of geometrically-shaped cells (10-21). Mobiles (24) in each cell are served by at least one base station (30-40) comprising a directional antenna having a beamwidth corresponding to the overall area of the associated cell. Each base station communicates with mobiles within the associated cell using separate primary channels (C.sub.p) within a first portion of the system frequency spectrum when a mobile is not experiencing interference above a predetermined interference level, and switches a mobile to a separate secondary channel (C.sub.p) within a selected section (f.sub.1, f.sub.2, f.sub.3) of the remaining second portion (f.sub.i) of the system frequency spectrum when the interference at a mobile exceeds the predetermined interference level. Each selected section used in adjacent portions of adjacent cells being within a different frequency subband of the second portion.
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"The Cellular Concept"-V. H. MacDonald-B.S.T.J., vol. 58, No. 1, Jan. 1979, pp. 15-41.
"Cell Site Hardware"-N. Ehrlich et al.-B.S.T.J., vol. 58, No. 1, Jan. 1979, pp. 153-173.
"Efficient Spectrum Utilization for Mobile Radio Systems Using Space Diversity"-Y. S. Yeh et al., Int'l. Conf. on Radio Spectrum Conservation Techniques, London, England, Jul. 7-9, 1980, pp. 12-16.
Reudink Douglas O.
Yeh Yu S.
Bell Telephone Laboratories Incorporated
Bookbinder Marc E.
Pfeifle Erwin W.
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