- Problems with long distance and the 802.11 MAC
- Carrier sense is meaningless when propagation delay is large
- collision probability increases dramatically
- Immediate acknowledgement adds 1 round trip time to every packet delivery
- RTS/CTS, if used, adds another round trip time to every burst of packets
- Solution for point-to-point links:
- Full duplex 802.11
- 2 wireless cards on each end
- 1 transmitter, 1 reciever with separate antennas
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