| 20 | | The protocol architecture is shown in the following Figure [[Image(cca.PNG)]] |
| | 20 | The protocol architecture is shown in the following Figure |
| | 21 | [[Image(cca.PNG)]] |
| | 22 | |
| | 23 | == Some Comments == |
| | 24 | |
| | 25 | * Previous schemes only suggest two channels, one radio. This C2M needs 2 radios. |
| | 26 | * The performance improvement comes from a "shaky" assumption: RTS/CTS is sending in lowest rate. If RTS/CTS is in the same rate as DATA frames. The conclusion would be: little throughput improvement. |
| | 27 | * RTS/CTS is not mandatory in IEEE 802.11. In most scenarios, the benefits of RTS/CTS are fairly small. If the CS range is set to equal to interference range, the hidden node could be avoided without RTS/CTS. |
| | 28 | * Continue from above, is per-packet reservation a bad idea? |
| | 29 | * With a new digital channel, more comprehensive information could be transported in that channel, instead of per-packet reservation. |
| | 30 | * It is possible to put ACK in control channel for better spatial reuse (for receiving block problem....) |
| | 31 | |
