Requirements For Roaming; Quality Of Service; Figure 25 Roaming Example - ZyXEL Communications PLA-450 User Manual

Chapter 4 Wireless LAN

Figure 25 Roaming Example

X
The steps below describe the roaming process.
1 Wireless station Y moves from the coverage area of access point AP 1 to that of access
point AP 2.
2 Wireless station Y scans and detects the signal of access point AP 2.
3 Wireless station Y sends an association request to access point AP 2.
4 Access point AP 2 acknowledges the presence of wireless station Y and relays this
information to access point AP 1 through the wired LAN.
5 Access point AP 1 updates the new position of wireless station Y.

4.3.1 Requirements for Roaming

The following requirements must be met in order for wireless stations to roam between the
coverage areas.
1 All the access points must be on the same subnet and configured with the same ESSID.
2 The adjacent access points should use different radio channels when their coverage areas
overlap.
3 All access points must use the same port number to relay roaming information.
4 The access points must be connected to the Ethernet and be able to get IP addresses from
a DHCP server if using dynamic IP address assignment.

4.4 Quality of Service

This section discusses the Quality of Service (QoS) features available on the ZyXEL Device.
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AP 1
Y
AP 2
Y
PLA-450 User's Guide