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3GPP WLAN interworking requirements

3GPP WLAN interworking requirements. Cheng Hong , Tan Pek Yew (Panasonic) WIEN 12 th July 2004. WLAN issues identified in 3GPP. USIM based access control (WLAN) Network sharing (discovery/selection) traffic enforcement Charging. Authentication scheme.

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3GPP WLAN interworking requirements

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  1. 3GPP WLAN interworking requirements Cheng Hong, Tan Pek Yew (Panasonic) WIEN 12th July 2004 Cheng Hong, Tan Pek Yew

  2. WLAN issues identified in 3GPP • USIM based access control (WLAN) • Network sharing (discovery/selection) • traffic enforcement • Charging Cheng Hong, Tan Pek Yew

  3. Authentication scheme • 3GPP requires (U)SIM based access control • Explicitly identified by SA1 in LS answer to SA2 (s1-040716) • The use has to be authenticated using 3GPP system (e.g. USIM) in order to access 3GPP PS services • Therefore, WLAN has to support: • EAP based authentication (11i) • UE has to contain USIM support (hardware, or software) Cheng Hong, Tan Pek Yew

  4. Network sharing and selection • Two issues involved in the network sharing arch in 3GPP: • Network information Discovery • Network selection • Network information discovery includes: • - WLAN capability discovery (e.g. WLAN is a IWLAN, Link capability of the WLAN, QoS status, etc.) • - Network behind the WLAN (e.g. what PLMN is connected, relationship with UE’s HPLMN) • So far two methods proposed • - SSID based for WLAN selection • - (Information to be included in the beacon/probe) • - EAP based • - A method developed in the EAP group (using EAP error message) • * More details in 3GPP TS24.234 from 3GPP CN1 group Cheng Hong, Tan Pek Yew

  5. Traffic separation & enforcement • Traffic separation & route enforcement • Especially important for a shared WLAN scenario • So far, VLAN is proposed in the 3GPP SA2 to provide the separation in TS23.234 • This requires: • AP to support VLAN tagging • VLAN tag to be delivered in the Authentication message Cheng Hong, Tan Pek Yew

  6. Charging requirements • WLAN Needs to support both for the interworking • Charging offline charged interworking subscribers • Charging online charged interworking subscribers • Details in TS23.234 sec 7.7 & 7.8 • For online charging • WLAN needs to support realtime monitoring • AP should collect real time usage information and carry out the update • Information has to be updated to the charging entity in WLAN (AAA entities) • Needs to be able to revoke user connection based on credit/quota updates Cheng Hong, Tan Pek Yew

  7. Conclusions • The items may impact the WLAN and needs to be studied in the WIEN: • Support of USIM based access control • Solutions for network discovery/selection • Traffic enforcement (VLAN) • Support of Charging (Online/offline) Cheng Hong, Tan Pek Yew

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