Inter-relay Handoff in two-hop relaying networks with highly mobile vehicles
1 State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, 100044, China
2 Department of Electrical and Computer Engineering, McMaster University, Hamilton, L8S 4K1, Ontario, Canada
EURASIP Journal on Wireless Communications and Networking 2012, 2012:300 doi:10.1186/1687-1499-2012-300Published: 21 September 2012
In multihop cellular networks, mobile users can communicate with the base stations via relay stations (RSs), and handoff between different RSs. This type of handoffs is referred to as inter-relay handoffs. In networks with highly mobile users, the inter-relay handoffs can occur very frequently. Making intelligent inter-relay handoff decisions is important in order to improve the network performance. In this article, we study the inter-relay handoff decision problem in a two-hop cellular network with highly mobile vehicles using a semi-Markov decision process. The objective is to maximize the total reward, which is defined by taking into consideration the transmission rate of the user’s link, the overheads for performing inter-relay handoffs, and the moving speed of the user. Numerical results are shown to demonstrate the effectiveness of the handoff decisions.