Load Balancing Algorithm in Heterogeneous Wireless Networks Oriented to Smart Distribution Grid

Combining the needs of distribution business with the performance of special wireless networks, we propose a load balancing algorithm in heterogeneous wireless networks oriented to smart distribution grid for heterogeneous multi-networks coexistence including LTE special networks, WiMax special networks and the special wireless networks at 230M frequency. Firstly the number of business that current overload networks need to transfer was calculated. Then based on different priorities of transferred services and new calls, different penalty functions of transferred and blocked services were established. The network resources were reasonably allocated to the transferred services and new calls according to call access control strategy obtained by chaos immune algorithm. Simulation results show that the algorithm can balance the loads among the overall heterogeneous system and decrease the service blocking probability. Simultaneously can reduce services transferred times to avoid the bad impact on the quality of services because of transferring of services. In addition, the algorithm can provide different serves for the distribution services with different priorities.