User's Manual

ezWAVE Cards Users’ Guide Version 1.6

Page 9 of 36

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{ BSS, ESS and SS ID

The basic service set (BSS) is the basic building block of WLAN network. Minimum

WLAN BSS may be consist of only two stations. Using access point (AP) and network

distribution systems (DS), WLAN service set can be extended arbitrary size – extended

service set (ESS). Each service set has its network ID (SSID). All the service sets within

an ESS network can have same service ID so that the ESS can support inter-cell

ROAMING.

Figure 4. SSID and Roaming

Backbone Network

AP #`2 SS ID

= Widelink

ROAMING

AP #`1 SS ID

= Widelink

AP #`3 SS ID

=Wide

ESS

BSS

Backbone Network

Re-Configuration

Required