802.11n PHY and MAC Layer Improvements

Physical Layer Improvements

1. Higher Modulation Rates – from 54 Mbps to 58.5 Mbps
2. Improved Forward Error Correction – from 58.5 Mbps to 65 Mbps
3. Short Guard Interval – from 65 Mbps to 72.2 Mbps
4. Channel Bonding, 40 MHz Channels – from 72.2 Mbps to 150 Mbps
5. MIMO – from 150Mbps to 600Mbps

MAC Layer Improvements

1. Aggregation of Packets
2. Block Acknowledge
3. Lower Overhead: Reduced Interframe Space
4. Backwards Compatibility
5. Power Save Modes

• Spatial Multiplexing (SM) power save – static and dynamic

• Power Save Multi-Poll (PSMP)