Telecommunications – Transmitter and receiver at separate stations
Patent
1994-10-07
1996-08-20
Pham, Chi H.
Telecommunications
Transmitter and receiver at separate stations
455 341, 455 561, 455 62, 455 671, H04B 726, H04Q 720
Patent
active
055488072
ABSTRACT:
A mobile communication system comprises base stations each having sector antennas and an omnidirectional antenna for receiving up-going interference waves on all communication channels previously allocated thereto to detect power levels of those interference waves. The power levels of up-going interference waves on all communication channels are monitored at all times by using the omnidirectional antenna. When a calling signal from a mobile station is received by a certain sector antenna, respective up-going C/I ratios are calculated on the channels not yet used among communication channels previously allocated to that sector. Among channels where the calculated up-going C/I ratios satisfy a predetermined quality reference, a channel to be allocated to the mobile station is determined.
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patent: 4128740 (1978-12-01), Graziano
patent: 5093924 (1992-03-01), Toshiyuki et al.
patent: 5093927 (1992-03-01), Shanley
patent: 5203008 (1993-04-01), Yasuda et al.
patent: 5355514 (1994-10-01), Borg
Patent Abstract of Japan of JP Appl. No. 3-167924(A), vol. 15, No. 408, Oct. 17, 1991, p. 107 E 1123.
Anderson et al., "Adaptive Channel Allocation in a TIA IS-54 System", (1992), pp. 778-781.
NEC Corporation
Pham Chi H.
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