Communications Research Laboratory (CRL) established a New Generation Mobile Network Project within its Yokosuka Radio Communications Research Center in Yokosuka Research Park (YRP) April 1(st). 2002, and has-been doing research and development of new technologies to enable seamless and secure integration of various wireless access networks such as existing cellular networks, wireless LANs, home networks as well as 4G cellular networks and intelligent transport systems (ITS). This four-year-long project covers wireless security platform technology, media handover technology and wireless access technology. All the developed technologies will compose a single test-bed in the final stage for demonstrating and evaluating new functions.