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Wlan loosely coupled to a mobile network – Siemens IEEE802.11 User Manual

Page 81

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WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt

Page 81

© Siemens, 2002

HLR

SGSN

SIM

loose coupling (SIM)

HLR

RADIUS

loose coupling (RADIUS)

WLAN loosely coupled to a Mobile
Network

n

Each hotspot is SS7 endpoint
– SIM cards required

– SGSN or MSC functionality

at access network

n

Tight userbase to HLR
– Standalone capability

– Flexibility in security