Chenbro Wireless LAN PC Card 11Mbps - Manual (Page 7)

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The adapter provides access to a wired LAN for wireless workstations. An integrated wireless
and wired LAN is called an infrastructure configuration. A group of WLAN PC users and an Access
Point compose a Basic Service Set (BSS). Each WLAN PC in a BSS can talk to any computer in the
wired LAN infrastructure via the Access Point.(Fig 2-2)
An infrastructure configuration extends the accessibility of a WLAN equipped PC to a wired
LAN, and doubles the effective wireless transmission range for 2 WLANs PCs. Since the Access
Point is able to forward data within its BSS, the effective transmission range in an infrastructure LAN
is double.(Fig 2-3)
The use of a unique ID in a BSS is essential. All WLAN equipped PCs configured without
roaming options in independent BSS must be configured with a BSS ID corresponding to the Access
Point used in the BSS. Check your Access Point for its BSS ID or use the Access Point Browser
Utility program to determine the BSS ID.(Fig 2-4)
The infrastructure wireless LAN configuration is appropriate for enterprise-scale wireless
access to a central database, or as a wireless application for mobile users.
Fig 2-2 Infrastructure Wireless LAN
Notebook with PCMCIA WLAN Card
Desktop with USB WLAN Adapter
Access Point 1
Access Point 2
Server Desktop PC
Fig 2-3 The effective transmission range