The design of W-CSCF with One Pass Authentication Mechanism

• Main Authors: Wen-Kai Chiu, 邱文凱
• Other Authors: Ming-Feng Chang
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/42581513748077960125

碩士 === 國立交通大學 === 資訊工程系所 === 92 === Universal Mobile Telecommunications System (UMTS) supports multimedia services through IP Multimedia Subsystem (IMS). In IMS, multimedia services are setup and controlled by the Call Session Control Function (CSCF). The WLAN-based GPRS Support Node (WGSN) integrates both Serving GPRS Support Node (SGSN) and Gateway GPRS Support Node (GGSN) functionalities and acts as a gateway between the Packet Data Network (PDN) and the WLAN node. Besides, the WGSN node provides an access mechanism to a GRPS network. In this thesis, we propose a component, WLAN-based Call Session Control Function (W-CSCF), to provide WLAN users in a WGSN network to access the IMS services. The W-CSCF node integrates both the I-CSCF and S-CSCF functionalities and is responsible for the service control and call control. Authentication procedure is performed at both the GPRS and the IMS networks before an MS can access the IMS services. We present a One-Pass Authentication mechanism for WLAN users to access the IMS services through a WGSN. One-Pass Authentication performs the GPRS authentication but simplifies the IMS authentication.