11/26 Integration of wireless LAN and 3G wireless - Interworking architecture between 3GPP and WLAN systems Ahmavaara, K.; Haverinen, H.; Pichna, R.; Communications Magazine, IEEE 11, Nov 報告者 : 洪英富

11/26 outline  WLAN system architecture  3GPP-based WLAN Access, Authentication and Authorization  User Data Routing and Access to Services  3GPP-Based Charging for WLAN

11/26 WLAN system architecture  WLAN terminal  Layer 2 distribution network  DNS  DHCP  AAA server / proxy  Billing system  Http server  Gateway NAPT

11/26 WLAN system architecture

11/26 WLAN system architecture (3GPP Subscription for WLAN)  SIM/USIM  HSS

11/26 3GPP-Base WLAN Access Authentication and Authorization  IEEE i  EAP SIM :authentication and key agreement protocol base on GSM  EAP AKA :encapsulates the UMTS Authentication and Key Agreement within EAP

11/26 User Data Routing and Access to Services  The technical architecture regarding user data routing has not been agreed on in 3GPP  IP network selection : W-APN,similar to the APN parameter used in GPRS  PDG : terminates the tunnel and acts as a gateway to the selected remote IP network  WAG : implement tunneling  Wn, Wp, Wu, W i : data plane  Wg, Wm : control plane

11/26 User Data Routing and Access to Services

11/26 3GPP-Based Charging for WLAN  Two different charging methods : (1)postpaid (2)prepaid :  CG : for postpaid, The charging information collection happens via so-callde charging gateway (CG)  OCS : online charging system for prepaid

11/26 3GPP-Based Charging for WLAN ..