Integration of Heterogeneous Ad hoc Networks with the Internet 1

This paper describes a testbed realized at T-Systems in Darmstadt (Germany) that handles the integration of ad hoc networks with the Internet. The testbed contains a Mobile Gateway that connects an IPv6 based ad hoc network over a cellular network (e. g. GPRS or UMTS) with the Internet. The testbed is also able to handle multiple gateways within the same ad hoc domain. This paper describes several mobility scenarios developed within the testbed, namely inter ad hoc domain mobility, intra ad hoc domain mobility and mobility of the whole ad hoc network. The paper also discusses main issues in the development of the testbed gateway discovery, seamless mobility and the transmission of IPv6 packets over IPv4 infrastructures.