DELAY AND ECHO CONTROL IN 3RD-GENERATION MOBILE SYSTEMS

Transmission delay and echo control are two of the most important issues which affect the voice quality of third-generation mobile systems. The development of the fixed network and the proliferation of both mobile systems and users would mean that echo-control devices alone may not be sufficient to cope with the quality demanded. Low transmission delay within the mobile network is, therefore, critical to guarantee that the performance requirements are met.