Rts/Cts; Figure 25 Extended Service Set; Figure 26 Rts/Cts - ZyXEL Communications P-330W - V1.90 User Manual

Figure 25 Extended Service Set

6.1.4 RTS/CTS

A hidden node occurs when two stations are within range of the same access point, but are not
within range of each other. The following figure illustrates a hidden node. Both stations (STA)
are within range of the access point (AP) or wireless gateway, but out-of-range of each other,
so they cannot "hear" each other, that is they do not know if the channel is currently being
used. Therefore, they are considered hidden from each other.

Figure 26 RTS/CTS

When station A sends data to the P-330W, it might not know that station B is already using the
channel. If these two stations send data at the same time, collisions may occur when both sets
of data arrive at the AP at the same time, resulting in a loss of messages for both stations.
P-330W User's Guide
Chapter 6 Wireless
59