Cellular radiotelephone system structured for flexible use of di

Details Cellular radiotelephone system structured for flexible use of di Cellular radiotelephone system structured for flexible use of di

1976-09-22

1979-03-13

Cooper, William C.

325 53, H04Q 704

Patent

active

041444116

ABSTRACT:
The use of plural cell sizes in cellular high capacity mobile telecommunications systems is facilitated by providing dual service availability in an essentially geographically continuous large-cell grid and an overlaid and essentially geographically discontinuous small-cell grid. When using certain frequency channel set assignment plans, large-cell antenna sites employ their ordinary channel set assignments whether or not a small-cell antenna site is also present. When a large-cell site is operated in the vicinity of a co-channel small-cell site, the respective channels of the large-cell site are operated in a large-cell mode or a small-cell mode as required to cooperate with the overlaid small-cell site. When using frequency channel set assignment plans requiring departures from ordinary large-cell channel assignments, the departures are similarly effected on the large-cell site channels that are operated in the small-cell mode. Also shown is an arrangement for channel-sharing around the faces of a directional antenna site to reduce the impact of adjacent channel interference.

REFERENCES:
patent: 3663762 (1972-05-01), Joel
patent: 3898390 (1975-08-01), Wells et al.
patent: 3906166 (1975-09-01), Cooper et al.
"Application for Developmental Cellular System", Illinois Bell Telephone Company, Fed. Commun. Comm. File 20115-CD-P-76, 7/1975.
"High-Capacity Mobile Telephone System Technical Report", Bell Laboratories, Dec. 1971, on file with the FCC.
"A Look at the Future of Mobile Telephone Service", Norman A. Adams, Telephony, 2/17/75, pp. 37-44.

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