Radio channel allocation example

Radio channel allocation example

IEEE802.11b, IEEE802.11g channel allocation

 This section explains which channel should be assigned to each access point when multiple access points are installed.

By assigning the optimum channel to the access point, you can build a wireless LAN without radio wave interference.

 To avoid radio interference, assign a different channel than nearby access points. By doing so, you can prevent radio wave interference from occurring between access points.

See the IEEE802.11b, IEEE802.11g channel layout below.

 The frequency bands used by each channel are slightly shifted. The channels configured for each access point must be selected with sufficient channel spacing to avoid overlapping frequency bands.

Radio interference is avoided by selecting channels so that the frequency bands do not overlap.

 For IEEE802.11b and IEEE802.11g, it is necessary to leave an interval of 5 channels or more so as not to cause radio wave interference.

 For IEEE802.11b, 1ch/6ch/11ch/14ch (Japan only). For IEEE802.11g, combinations such as 1ch/6ch/11ch, 2ch/7ch/12ch, 3ch/8ch/13ch are used.

If there is a space of 5 channels or more, radio wave interference will be avoided, so a combination of 1ch/7ch/13ch is also possible.

An example of optimal channel allocation is shown below.

IEEE802.11a channel allocation

For IEEE802.11a, the frequency band assigned to each channel does not overlap with other channels.

There is no problem in assigning channels as shown below.

Radio congestion prevention function

 If the access point has a function to prevent radio wave congestion, it will automatically search for available channels and automatically set the available channels. You can easily assign the best channel without any hassle.