Telecommunications – Transmitter and receiver at separate stations
Patent
1994-04-26
1995-08-15
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
455 334, 455 341, 455 542, 455 561, 379 59, H04B 726, H04Q 738
Patent
active
054428076
ABSTRACT:
In a cellular communication system, a mobile station detects field intensities of surrounding cell sites and transmits a report signal to one of the surrounding cell sites having highest field intensity. Each cell site detects the channel occupancy of its speech channels in response to a connection request from a home cell site and returns a response indicating whether the request is to be granted or not depending on the channel occupancy. The home cell site is responsive to the report signal for assigning priorities to the surrounding cell sites according to its channel occupancy and selects one of the surrounding cell sites according to the assigned priorities. If the home cell site is not selected, it sends a connection request to the selected cell site for receiving a response. If it is selected, it determines whether a speech channel is available or not depending on its channel occupancy. A channel identifier is transmitted to the mobile station if the response from the selected cell sites indicates that the connection request is granted or if the speech channel is determined to be available. If the response indicates that the request is not granted or if there is no speech channel available, cell sites of lower priority are successively selected and the process is repeated. A busy signal will be sent to the mobile station if the repeated attempts fall.
REFERENCES:
patent: 5241686 (1993-08-01), Charbonnier
patent: 5313652 (1994-05-01), Rozenstrauch et al.
patent: 5349632 (1994-09-01), Nagashima
patent: 5363428 (1994-11-01), Nagashima
NEC Corporation
Pham Chi H.
Urban Edward F.
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