Patent ID: 6917916
Filing Date: 2005-07-12
Classification: H04L,H04W

Abstract:
1. In digital wireless communication system, the digital wireless communication system including a plurality of elements comprising a plurality of mobile stations, a plurality of base transceiver stations, each of the plurality of base transceiver stations in communication with at least one of the plurality of mobile stations, a transcoder configured to provide a signal conversion capability between vocoder frames and pulse code modulation, and a mobile switching center for interconnecting the digital wireless communication system to a public switched telephone network, a method for determining a fault in a digital channel of the digital wireless communication system, the method comprising: (a) generating a first set of vocoder input parameters, the first set of vocoder input parameters resulting from a speech input signal; (b) generating a second set of vocoder input parameters, the second set of vocoder input parameters resulting from an output signal substantially equivalent to the speech input signal as it is received at a mobile station via the digital channel; (c) calculating a metric based on the first set of vocoder input parameters and the second set of vocoder input parameters; and (d) determining a fault in the digital channel using the metric.