Mobile IP, in particular Mobile IPv6, has no native support for moving networks. A basic solution for network mobility is currently being standardised by the IETF Network Mobility (NEMO) working group. In the frame of the IST OverDRiVE project Ericsson Research Hungary Traffic Lab implemented a moving network testbed in which network mobility is based on the IETF NEMO basic solution. In addition, the testbed supports micro-mobility of user devices that move within large moving networks, such as trains. The moving network possesses multiple interfaces including access to WLAN, GPRS and UMTS. This paper introduces the concepts developed in OverDRiVE, describes Ericsson's OverDRiVE moving network testbed, introduces some IP handover types, analyses measurements of IP handover delays for various mobility scenarios of moving networks and presents some 3G measurements.
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