IMPLEMENTATION OF AN INTEGRATED SECUREMOBILE WIRELESS ARCHITECTURE

摘要

3G wireless wide area mobile and the IEEE 802.11 familyof local area wireless technologies are two of the mostsignificant emerging wireless technologies and botharchitectures possess complementary characteristics.While 3G networks offer always-on, ubiquitousconnectivity with relatively low data rates, 802.11 offersrelatively low cost communication at higher data rates,but encompasses only small geographical areas, suitablefor hot-spot applications in hotels, campus and airports.By developing a link between the two architectures, it ispossible to achieve always best-connected services i.e.essentially continuous communication via the interfacethat offers the best price/performance characteristics.However, the mobility requirements of mobile userschange with various scenarios. Such users typically wantto connect to the public or private networks mostconvenient to them at the time of connection. We presenta versatile mobility solution, which accommodatesdifferent interfaces with different levels of security andauthentication, which could be deployed as and whenrequired. Our testbed is based on standardised protocolsincluding Mobile IP, IPSec, AAA and 802.1x, and wepresent performance analysis to validate our architecturalapproach.