Configuring Overlapping Wireless Aps - HP M210 Configuration And Administration Manual

Configuring overlapping wireless APs

When the radio is operating in the 2.4 GHz band and two or more APs may are within
transmission range of each other, they may use overlapping channels. This may be under your
control (for example, when you use several APs to cover a large location) or out of your control
(for example, when your neighbors set up their own wireless networks). In either case, the
problems you face are similar.
Note
Overlapping channels do not occur when the radio is operating in the 5 GHz band. All 5 GHz
channels are non-overlapping.
Performance degradation and channel separation
When two wireless APs operating on the same frequency overlap, throughput can be reduced
in both APs. Reduced throughput occurs because a wireless user that is attempting to transmit
data defers (delays) transmission if another station is transmitting. In a network with many users
and much traffic, these delayed transmissions can severely affect performance, because
wireless users may defer several times before the channel becomes available. If a wireless user
is forced to delay transmission too many times, data can be lost.
Delays and lost transmissions can severely reduce throughput on a network. To view this
information about your network, select Status > Wireless.
The following example shows two overlapping wireless APs operating on the same frequency.
Since the APs are within range of each other, the number of deferred transmissions can be
large.
48 Wireless configuration
AP 1 AP 2
Channel = 1 Channel = 1
AP AP