User's Manual

Network Configuration and Planning
19
A wireless infrastructure can be used for access to a central database, or for connection
between mobile workers, as shown in the following figure.
Setting the Communication Domain
Stationary Wireless PCs
The Basic Service Set (BSS) is the communication domain for each access point. For
wireless PCs that do not need to support roaming, set the domain identifier (SSID) for the
wireless card to the SSID of the access point you want to connect to. Check with your
administrator for the SSID of the access point you should connect to.
Roaming Wireless PCs
A wireless infrastructure can also support roaming for mobile workers. More than one
access point can be configured to create an Extended Service Set (ESS). By placing the
access points so that a continuous coverage area is created, wireless users within this
ESS can roam freely. All wireless adapters and access points within a specific ESS must
be configured with the same SS ID and to the same radio channel.
File
Server
Switch
Desktop PC
Access Point
Wired LAN Extension
to Wireless Adapters
PC with Wireless
PC I Adapter
Notebook with Wireless
PC Card Adapter
File
Server
Switch
Desktop PC
Access Point
Notebooks with Wireless
PC Card Adapters
Seamless Roaming
<BSS2>
<ESS>
<BSS1>
PC with Wireless
PC I Adapter
PC with Wireless
PCI Adapter
Notebook with Wireless
PC Card Adapter
Access Point
Wireless Cell
Coverage Area