Siemens IEEE802.11 - Manual (Page 54)

WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt Page 54 © Siemens, 2002
Mobility inside a WLAN ‘hotspot’
by link layer functions...
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Station decides that link
to its current AP is poor
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Station uses scanning
function to find another AP
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or uses information from
previous scans
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Station sends Reassociation
Request to new AP
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If Reassociation Response is successful
−
then station has roamed to the new AP
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else station scans for another AP
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If AP accepts Reassociation Request
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normally old AP is notified through Distribution System
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AP indicates Reassociation to the Distribution System