Mobile/base protocol architecture

Layer 1

• modulation/demodulation

• transmitter/receiver switching

• frequency(or channel) setting

• RSSI(outputs Radio-Signal-strength-Indicator

• frequency correction
• power control

• broadcast parameters related to power control part of the MAC

• symbol synchronization

• receiving/submitting data from and to the MAC
• slot flag coding/de-coding using two distinct training sequences
• scrambling/de-scrambling

## Layer 2 **Medium Access Control (MAC) **

- channel coding
-