Research On Power Control Based On OPNET

With the large-scale growth of data traffic in mobile communication networks,in order to meet people's communication demand,the future mobile networks will inevitably add a large number of Low-power nodes to form a multi-layer network.The multi-layer network can effectively solve the problem of coverage and capacity in mobile telecommunication network,however accompanied by a complicated wireless environment.It is necessary to reduce the interference of the dual-layer network,before deploying multi-layer network massively.Power control is one of the key technologies to solve the problem of interference.Not only can it alleviate the impact of limited spectrum resources and the limited battery capacity of mobile devices in wireless networks,but also can reduce interferences and improve the network capacity.Therefore,this paper mainly research on the power control and the main work is as follows.First,this paper introduces the power control technology and its research status of LTE.Meanwhile,the paper introduces the correlation theory of the power control technology of LTE,including power headroom,path loss,reference signal receiving power,modulation and coding scheme,channel bandwidth,and the relation of them and the power control.Secondly,this paper analyses,path loss compensation coefficient and modulation and coding scheme compensation of the power control to acquire the influence of the three parameters to the power control.Previous research mostly focused on the basic open-loop operating point of the FPC,ignoring the closed-loop power control for convenience.Therefore,this paper researches how the FPC based on open-loop power control and intensively research the FPC adding the closed-loop power control to influence the network performance.Finally,this paper propose an uplink power control method based on a duallayer network,using the co-tier interference of the macro network for reference,so that the macro eNodeB interference generated by small cell's users is not more than that of the neighboring cell's users.In the end,the simulation verify the validity of the proposed algorithm.The simulation results show that the proposed algorithm can ensure the small cell's throughput as much as possible,under the condition that the influence on the macro cell is small.