A Modified Inter-cell Interference Coordination Algorithm in Downlink of TD-LTE Trunking Communication System

In this paper, a modified inter-cell interference coordination (ICIC) algorithm is proposed for TD-LTE trunking communication system. The group call in trunking communication system is the basic scheduling business, and the group call has a priority. So the proposed scheme must take this into consideration. We mentioned that the program has the following two steps: first, conduct soft frequency reuse(SFR) prevent mutual interference of the cell edge users and second, the optimal sub-carrier allocation in order to maximize the cell edge user performance, while ensuring the quality of service of the cluster of high-priority business users. We use the improved scheduling algorithm to solve the problem of optimal sub-carrier allocation. Simulation results show that our proposed scheme can significantly improve the cell edge user throughput and ensure quality of service for high-priority services.