maximum data rate. The autonomous mode allows the mobile to start up a service at
any time while simultaneously reducing the delay. In this way the system is able to provide
different levels of quality of service, to enable it to meet the needs of the mobile more
accurately.
4. Reverse Secondary Pilot Channel (R-SPICH). This channel serves three purposes: to facilitate fast
and simple detection, to improve reverse link power contro l, and to improve the coherent
demodulation.
Further channels were also introduced in the forward link:
1. Forward Grant Channel (F-GCH) . This channel is monitored by all mobiles within the
sector served by the channel. It is used when high-speed data transmissions are to
be undertaken, and it allows a mobile access to