With the high speed railway (HSR) systems becoming increasingly popular and the explosive growth in the number of mobile devices, the provision of a better user experience on high speed trains is a pressing problem. The user experience includes not only the transmission rate, but also the transmission delay caused by handover failure. The special linear topology of HSR system leads to the fact that the transmission rate has high dependence on the position of trains. However, the linear topology also makes it possible to implement efficient power allocation (PA) along the railway to improve the system performance. In this paper, we seek to find an appropriate PA scheme to achieve the trade-off between the transmission rate and the delay. A sub- optimum PA scheme is proposed which can, under a certain delay constraint, maximize the average capacity. The simulation results show that the proposed PA scheme can reduce the delay at the cost of slightly reduced capacity, hence providing some insights into the optimal system design.
Tradeoff of Capacity and Handover Performance in High Speed Railway Wireless Communications
2016-05-01
198476 byte
Conference paper
Electronic Resource
English