System and method for wireless local calling

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/38 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2315962

A wireless communications technique enables direct call set up and communication between wireless subscribers without involving network infrastructure. A mobile is modified to perform like a network base station during a local calling mode initiated by a user, thereby reversing transmit and receive frequency bands and allowing the mobile to set up and carry out a call as if it were a network base station. The mobile initially performs a communication channel or frequency sweep sequence to determine an idle traffic channel, thereby preventing interference with other subscribers. After a local call is established, the transceiver monitors call quality, and performs another communication channel or frequency sweep sequence to select a new traffic channel when call quality drops below a threshold level to ensure a certain level of call quality between the first and second mobiles.

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