An Integrated Network Mobility Management and Call Admission Control Scheme for Internet Access on High-speed Trains

Automotive telematics has become an important capability of high-speed rail systems, which are increasingly popular in the era of green technology. As train speeds increase, communications between devices on the train and devices outside the train encounter difficulties, and maintaining high quality communication is a major challenge. Moreover, handovers on high-speed trains occur more frequently, and have shorter permissible handling times. In this paper, the proposed 2MR scheme takes the advantage of the physical size of high-speed trains to deploy two mobile routers (MRs) in the first and final carriages. This scheme offers a protocol to allow the two MRs and wireless network infrastructure to cooperate in providing a seamless handover. The 2MR Call Admission Control (CAC) scheme gives integrated admission controls for applications of different priority classes. Our simulation results demonstrate that the 2MR scheme ensures QoS provisioning of admitted sessions, and reduces handover latency as well as packet loss for high-speed trains. Index term: call admission control; high-speed train; network mobility; seamless handover