基于异构网络的干扰协调优化方案

With the boom in mobile data services and restriction on frequency resource in LTE-A system，heterogeneous network has been one of the most important factors to maximize the frequency reuse ratio.Due to the introduction of multi-layer cells, the interference within the network will become more complicated.In order to solve this problem,techniques of inter-cell interference coordination including many kinds of frequency domain schemes can be used.At the same time,the users access to pico cells will be too few,so the cell range expansion technology can be used,but it will lead the cell edge users of pico cell to a decline in quality of communication.This paper studies the multiple frequency domain solutions and analyzes their spectrum efficiency,then proposes an evolved scheduling scheme(EPF) combined with cell range expansion technology that improve the priority of cell edge users in pico cell,enhancing the throughput and blocking rate of cell edge users.