A seamless mobile VPN data solution for CDMA2000,∗ UMTS, and WLAN users

Mobile virtual private networks (MVPNs) can provide remote users with easy, secure high-speed access to their enterprise network resources. There is a tremendous market opportunity for operators who can meet the needs of these users. Third-generation (3G) systems, such as code division multiple access (CDMA) (3G-1X and 1xEV-DO) or universal mobile telecommunications system (UMTS), and IEEE 802.11b wireless local area network (WLAN) systems have complementary strengths. For end users, integrating these systems provides ubiquitous high-speed data coverage, continuous selection of the highest possible data rates, and seamlessly maintained user VPN sessions when moving between air interface technologies. For operators, they enable integrated billing and offload 3G network capacity for higher revenue voice subscribers. This paper shows how Lucent Technologies uses IETF mobile IP (MIP), IP security (IPSec), and multiple tunneling protocol standards to offer a comprehensive transport layer solution across 3G and WLAN air interface technologies. Shared requirements for accounting, authentication, security, and confidentiality in 3G and WLAN core data networks are also addressed.