Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1994-12-13
1996-10-15
Faile, Andrew
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
455 333, 455 561, 342432, H04B 714
Patent
active
055663559
ABSTRACT:
In a cellular mobile telecommunications system, a radio link control method provides each base station with an antenna whose directivity is adaptively controllable on a mobile station basis. The base station communicates with a plurality of mobile stations by using the same frequency at the same time. The base station selects, among transmitters/receivers thereof which are in communication, two transmitters/receivers using the same frequency, detects the main beam directions of antenna directivities thereof, and then compares a difference between the main beam directions and a predetermined threshold. If the former is smaller than the latter, the base station executes handover so as to replace the frequency being used by one of the transmitters/receivers with another frequency. The method allows a single base station to use the same frequency twice or more while preventing interference from occurring within the base station.
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T. Ohgane, "Improving Frequency Utilization Radio by . . . Directivity of Cellular Base Station", Inst. of Elect. Data Comm. Engrs. of Japan, Spring Con., Fascicle No. 2, B-397, pp. 2-398, Apr. 1993.
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Faile Andrew
NEC Corporation
Nguyen Lee
LandOfFree
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