Handoff decision algorithm with dynamic sampling distance in GSM-R network

The proposed handoff decision algorithm with dynamic sampling distance is the extension of the conventional algorithm based on received signal strength (Abbr. RSS). The dynamic sampling distance is coincident with the velocity of MT in GSM-R moving along the trajectory of high speed railway. The proposed algorithm was evaluated under two simple cell deployments along the high speed railway trajectory-the one is the single layer linearity deployment, and the other is the single layer interleaving deployment. From simulation results, we can see that our proposed handoff decision algorithm with dynamic sampling distance can gradually decrease the average number of handoffs while the speed of MT goes higher, up to 500km/h, and obtain the lower probability of unnecessary handoff for lighting the GSM-R system load.