Call Admission Control Algorithm Based on Load Balance for Multi-hop Relay Network

A call admission control algorithm based on load balance strategy for multi-hop relay system is proposed.According to cell's current load, server base station detects neighbor cell's load condition to make a choice whether performs handover on Fixed Relay Station(FRS) located at cell's boundary to neighbor cell or not, which alleviate current cell's load and accept more subscribers when handover subscribers arrive.Simulation analysis results show that the total traffic in hot cell can be controlled effectively by proposed call admission control algorithm, and new traffic blocking probabilities and handover dropping probabilities can be decreased.