Adaptive handoff algorithms for dynamic traffic load distribution in 4G mobile networks

In 4G mobile networks which is a kind of packet-based cellular systems, resources are shared among all users and the amount of available resources is determined by traffic load. If traffic load is concentrated in a cell, this cell become to the hotspot cell. The hotspot cell can cause to block or drop calls and consequently degrades the service quality even though available resources are remained in neighboring cells. Therefore, it is essential to distribute traffic load of the hotspot cell in order to effectively use remained resources and maintain the acceptable service quality. We propose adaptive handoff algorithms for dynamic traffic load distribution in the hotspot cell. In the simulation, we find that these algorithms can reduce call drop rate of new and handoff calls thus enhance the service quality