ecture for IP Address Allocation with CIDR. RFC 1518, Internet Engineering Task Force, September 1993. 37. Fuller, V., Li, T., Yu, J., and Varadhan, K. Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy. RFC 1519, Internet Engineering Task Force, September 1993. 38. Egevang, K. and Francis, P. The IP Network Address Translator (NAT). RFC 1631, Internet Engineering Task Force, May 1994. 39. Project, WIDE. The WIDE Project, http://www.wide.ad.jp/. 40. Project, WIDE. The KAME Project, http://www.kame.net/. 41. Fink, R. and Hinden, R. 6bone (IPv6 Testing Address Allocation) Phaseout. RFC 3701, Internet Engineering Task Force, March 2004. 42. Hinden, R., Fink, R., and Postel, J. IPv6 Testing Address Allocation. RFC 2471, Internet Engineering Task Force, December 1998. 43. Mockapetris, P.V. Domain names - concepts and facilities. RFC 1034, Internet Engineering Task Force, November 1987. 44. Cheshire, S., Aboba, B., and Guttman, E. Dynamic Configuration of IPv4 Link-Local Addresses. RFC 3927, Internet Engineering Task Force, May 2005. 45. Huston, G. Operational Requirements for the Address and Routing Parameter Area Domain (arpa). RFC 3172, Internet Engineering Task Force, September 2001. Basics of the 3GPP Technologies Mobile broadband has swept though the world during the past few years. The growth in the number of subscribers has been phenomenal, and it might seem as if the services have just appeared very quickly, but the systems, and the technology it relies on have been in the development for almost two decades. The key organization in the cellular, mobile broadband systems is the 3GPP [1]. 3GPP is a Standards Development Organi- zation (SDO), which is a joint project between six regional and national SDOs. (The Association of Radio Industries and Businesses (ARIB) from Japan [2], the Alliance for Telecommunications Industry Solutions (ATIS) from USA [3], China Communications Standards Association (CCSA) from China [4], European Telecommunications Standards Institute (ETSI) from 