6-5
14) Re-association
When a client is roaming from one AP area/BSS area to another, it
sends a re-association request to the new AP/BSS area. The AP
relays this re-association request to the AC. The AC then informs the
previous AP to delete the client’s information from its database,
informs the new AP to add the client’s information in its database and
conveys successful reassociation information to the client.
802.11 Overview
The following functions are provided by the WLAN-MAC:
z
Beacon generation
z
Handling Probe Requests
z
Handling Open System Authentication
z
Handling (Re) Association
z
Handling Deauthentication
z
Handling Disassociation
z
Power Management
z
Fragmentation and Defragmentation
z
Dot11 to Ethernet Frame Conversion
z
Ethernet to Do11 Frame Conversion
z
Keep Alive Mechanism
z
Idle Timeout Mechanism
z
Clear Channel Search
WLAN Topologies
WLAN Topologies for Fat APs
WLAN topologies for Fat APs consist of:
z
Single BSS
z
Multi-ESS
z
Single ESS Multi-BSS
