METHOD AND APPARATUS FOR REDUCED REVERSED TRAFFIC IN A CELLULAR TELEPHONE SYSTEM

摘要

A code division multiple access (CDMA) cellular telephone with reduced transmissions from the CDMA cellular telephone to a remote base station. A variable rate vocoder is operable to receive an input signal and encode the input signal at any of a plurality of frame rates responsive to an amount of audio content present in the input signal. A controller monitors an encoding rate of operation of the variable rate vocoder and detects when the variable rate vocoder operates at a predetermined rate. The controller then causes a transmitter coupled to the variable rate vocoder to reduces a duty cycle of operation.