Desktop PC
Desktop PC
File Server
Access Point
Access Point
Notebook with
Wireless PC Card
Notebook with Wireless PC Card
Notebook with Wireless PC Card
Notebook with
Wireless PC Card
BSS1
BSS2
Hub
ESS
Desktop PC with
Wireless PC Card
Desktop PC with
Wireless PC Card
Figure 2. Infrastructure Configuration
The infrastructure configuration supports roaming capability for mobile workers. More than one BSS can be jointly
configured as an Extended Service Set (ESS). On account of a continuous connection to the network, users within
this ESS can roam freely. All wireless LAN cards and APs within one ESS must be configured with the same ESS
ID.
Before setting up an ESS for roaming, it would be helpful to achieve good performance by choosing a feasible radio
channel and right places for APs.
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