1. GPP TS 23.234 v6.2.0, 3GPP system to Wireless Local Area Network (WLAN) Interworking; System Description (Release 6), September 2004.
2. Interworking architecture between 3GPP and WLAN systems;Ahmavaara;IEEE Communications Magazine,2003
3. Interworking techniques and architectures for WLAN/3G integration toward 4G mobile data networks;Salkintzis;IEEE Wireless Communications,2004
4. The Internet Engineering Task Force, URL:http://www.ietf.org.
5. Internet2 QoS Working Group, URL:http://qos.internet2.edu/wg/.