1N P Shave. Roaming between Satellite and Terrestrial Networks [J]. 3G Mobile Communitation Technologies, 2002.5, (489): 58~63.
2Segura, R., Farkas, J. Secure Virtual Private Networking over Inmarsat Packet-based Services [ A ]. Military Communications Conference[C]. MILCOM: 2003, 2:844~849.