Digital cellular switching system with means for securing...

Details Digital cellular switching system with means for securing... Digital cellular switching system with means for securing...

H - Electricity

04

B

H04B 7/212 (2006.01) H04B 7/26 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2066529

In a cellular communications system, the quality of a signal over a first two-way connection from a destination to a mobile terminal is compared with a threshold. When the signal quality becomes lower than the threshold, a second two-way connection is established and a switching request signal and an information-bearing signal are sent from the mobile terminal through both connections to a switching exchange. In response to the request signal, one directional path of the first connection is cleared by the exchange to prevent a version of the signal passing through the first connection from reaching the destination and a first switching complete signal is sent through the other path of the first connection to the mobile terminal to allow it to clear the first connection and return a second switching complete signal. The other path of the first connection is then cleared by the exchange in response to the second switching complete signal.

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