Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-12-20
2005-12-20
Corsaro, Nick (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S560000, C455S067110
Reexamination Certificate
active
06978130
ABSTRACT:
The invention provides a method, a communication system, a communication network, a communication apparatus and a communication terminal enabling the voice coding mode during voice communication to be changed by a common operation independently of diverse network configurations.A first network monitors the communication situation including quality of a radio link during voice communication of a first terminal, and determines an appropriate coding mode based on the communication situation. In addition, the first network sends to the first terminal a first request for change to the appropriate coding mode. Upon reception of the first request, the first terminal sends a second request for change of the coding mode to a second network. Upon reception of the second request, the second network changes the coding mode of the voice codec given to a second terminal engaged in voice communication with the first terminal, and sends back to the first terminal a response to the second request. The first terminal, which receives the response to the second request, sends back to the first network a response to the first request.
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Corsaro Nick
Muirhead and Saturnelli LLC
NEC Corporation
Persino Raymond B.
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