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 Mhz

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