Load Balancing Mechanism Based on Cooperation Probability in Cooperative Communication Networks

In wireless communication networks, the load balancing mechanism can improve the frequency utilization and reduce the outage rate. Furthermore, the user cooperation is used to enhance the SNR of the edge user. Therefore, in cooperative wireless communication network, the cooperation probability is introduced in the handover decision function of existing load balancing mechanisms which are based on the received signal strength of the user and the load of BS. The cooperation probability is calculated by the signal strength of user and the load of BS to make a revision for the existing handover decision function. The combination of the received signal strength of the user, the load of base station and the cooperation probability in handover decision function can improve the accuracy of handover decision. The simulation results show that the mechanism can improve the system capacity and fairness while balance the network load.