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WLAN Interworking scenarios

This document discusses interworking scenarios for WLANs, including non-roaming WLAN interworking with home networks and roaming WLAN interworking with visited networks. It covers interworking service types, mobility issues, interworking scope, and interworking requirements such as security, enforcement of policy, and QoS support.

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WLAN Interworking scenarios

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  1. WLAN Interworking scenarios Cheng Hong, Tan Pek Yew (Panasonic) WIEN 14th May 2004 Cheng Hong, Tan Pek Yew

  2. Interworking scenarios – example from 3GPP Assumptions: WLAN1(s) interworked with 3GPP-H (HPLMN); WLAN2(s) interworked with 3GPP-V(VPLMN); WLAN3(s) not interworked. Cheng Hong, Tan Pek Yew

  3. Interworking scenarios Interworking scenario I: non-roaming WLAN interwork with Home Network Interworking scenario II: roaming WLAN interwork with a Visited Network • To the WLAN, the interface should be the same • This result in the network selective issue, e.g. a WLAN could be shared by the home network and the visitied network Cheng Hong, Tan Pek Yew

  4. Interworking service types: • WLAN UE accessing local WLAN services • e.g. Direct connection to Internet • e.g. local WLAN services, services, e.g. printing, etc. • requires only local IP connectivity and necessary access control • WLAN UE accessing services from home network • e.g. accessing IMS services from 3G network • requires more than WLAN local IP connectivity • needs control and enforcement: operator’s requirement • e.g. To access IMS the UE has to be in the same address domain • E.g. Security requirements, Cheng Hong, Tan Pek Yew

  5. Mobility issues • Mobility between different WLANs • not in the scope of other standardization body’s scope • in the scope of IEEE 802.11 – WIEN • Mobility between WLAN and external network • Also studied in the other standards, e.g. 3GPP • It is identified as interworking scenario4 and above • It also requires the IEEE to work at the WLAN side of the support Cheng Hong, Tan Pek Yew

  6. Interworking scope • Work on the service establishment issues (for both services inside WLAN and external network) • Includes access control in the WLAN and interface to the external network • Includes the address control, and the interface to the external network • Includes enforcement control in WLAN and the interface to the external network • Includes the QoS control in WLAN for the interworking and the interface to the external network • Work on the mobility support • on the transition between 802.11 and external network when MT access service from external network • on the transition between 802.11 networks when the MT access service from an external network Cheng Hong, Tan Pek Yew

  7. Interworking requirements • Security • It shall not compromise security of the external network when a terminal access service from a WLAN • existing security schemes in WLAN shoul be reused in a proper way to provide • Enforcement of policy • It shall be possible to enforce policy regarding the service access by the MT • It shall be possible to apply consistent policy in the WLAN for MT according to its subscription at home network • QoS • It shall be possible to provide consistent QoS support in the WLAN • It shall be possible to map and enforce QoS requirements from external network to WLAN access technology • The QoS provided shall comply with MT’s subscription at home network Cheng Hong, Tan Pek Yew

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