Appendix B - Planning and Designing The Network
Channel Planning
Deploying a network requires careful channel planning.
ISM Band Description
There at most three non-overlapping non-interfering channels in the 2.4Ghz band.
|
annel |
Center Frequency |
Bottom |
Top |
Width |
|
1 |
2.412Ghz |
2.401Ghz |
2.423Ghz |
22 Mhzi |
|
6 |
2.437Ghz |
2.426Ghz |
2.448Ghz |
22 Mhz |
|
11 |
2.462Ghz |
2.451Ghz |
2.473Ghz |
22 Mhz |
2.4Ghz Three Non Overlapping Channels
With careful channel reuse planning one can use an additional channel from the band with minimium degragation and interference.
|
Channel |
Center Frequency |
Bottom |
Top |
Width |
|
1 |
2.412Ghz |
2.401Ghz |
2.423Ghz |
22 Mhz |
|
4 |
2.427Ghz |
2.416Ghz |
2.438Ghz |
22 Mhz |
|
7 |
2.442Ghz |
2.431Ghz |
2.452Ghz |
22 Mhz |
|
10 |
2.457Ghz |
2.446Ghz |
2.468Ghz |
22 Mhz |
2.4Ghz Four Overlapping Channels
So an ideal community channel map could look something like the following diagram.
Things become additional more complicated for the backhaul channel and it is strongly recommended to use 5Ghz for the backhaul since there are 7 non-overlapping channels to choose from. Also there are less opportunity for other 2.4Ghz devices to interfere with the backhaul network.
Other Resources
Advantages of using sector antennas instead of an omni
5.8Ghz channel reuse plan for wide area coverage