Siemens IEEE802.11 - Manual (Page 83)

WLAN-IEEE802.11 Tutorial (Maximilian Riegel), 021018-wlan-tutorial.ppt Page 83 © Siemens, 2002
Standards for WLAN/UMTS interworking
n
3GPP
– R5: SA1
Requirements of 3GPP system – WLAN interworking.
– R6: SA2
Continuation with architectural considerations
n
ETSI BRAN
Subgroup on “Interworking between HiperLAN/2 and 3
rd generation cellular
and other public systems”.
– Detailed architectural description mainly based on the Siemens ‘loose
coupling’ principle established
– IEEE802.11 and MMAC are now joining this effort.
=> Wireless Interworking Group (WIG).
n
WECA (Wireless Ethernet Compatibility Alliance)
‘Wireless ISP Roaming Initiative’
– Detailed functional specification for roaming (loose coupling) between
IEEE802.11 WLAN networks available.
– Mainly aimed for roaming between ISPs but also applicable for MNOs.