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WLAN loosely coupled to a Mobile
Network
loose coupling (SIM)
HLR
SGSN
SIM
n
Each hotspot is SS7 endpoint
– SIM cards required
– SGSN or MSC functionality
at access network
WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt
loose coupling (RADIUS)
HLR
RADIUS
n
Tight userbase to HLR
– Standalone capability
– Flexibility in security
Page 81
© Siemens, 2002
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