Patent ID: 6088431
Filing Date: 2000-07-11
Classification: H04M

Abstract:
In a cellular mobile radio network having a voice channel for transmitting voice information and a control channel for transmitting control information that manages access to and use of the voice channel, a method of allocating a voice channel to a cellular mobile radiotelephone, comprising:a) transmitting a call origination message from the radiotelephone over the control channel, the call origination message comprising:i) a mobile identification number (MIN) uniquely identifying the radiotelephone;ii) a sequence of digits specifying a remote feature control request that invokes the forwarding of the sequence of digits by a serving mobile switching center (MSC) upon detecting the remote feature control request, and a count indicating time elapsed for a previous call by the radiotelephone;b) receiving the call origination message at the MSC;c) decoding the call origination message and detecting the MIN and the remote feature control request at the MSC;d) forwarding the remote feature control request and the count to a central monitoring station (CMS) associated with the MIN upon detecting the remote feature control request;e) comparing the count with a prepaid time associated with the MIN; andf) sending an approval message to the serving MSC if the prepaid time is greater than the count.