ENERGY EFFICIENT POWER ALLOCATION WITH BUFFER CONSTRAINT FOR HIGH SPEED RAILWAYS

Abstract

The rapid development of high-speed railways (HSRs) all over the world is drawing much more attention on high mobility wireless communication. For the wireless links that connect the passengers on the train to the cellular network, it is very essential to employ an appropriate power allocation strategy to guarantee the reliability and efficiency of information transmission. So, this paper concentrates on evaluating the transmission performance of wireless links in the HSRs and attempting to derive an optimal power allocation strategy of this scenario. It is proved that traditional water-filling algorithm and channel inverse algorithm can be regarded as two specifical cases of this new algorithm.