Research On Energy Efficiency And Security Rate Optimization Of Wireless Multi-hop Network Under Full Duplex

With the continuous innovation of wireless communication transmission and Internet technology,the improvement of wireless network performance is becoming more and more important.As an effective way to improve the performance of network transmission,full duplex has attracted great attention of researchers which come from many countries.At the same time,as a new network structure that can increase the flexibility of network routing and the utilization of network resources,wireless multi hop network is also explored in depth by many researchers.Therefore,bu using full duplex technology,whether the performance of wireless multi hop networks can be effectively optimized has become a research hotspot.In this paper,based on full duplex scheduling in wireless multi hop network,we use cross layer optimization technology to explore the network energy efficiency and secrecy rate.The main work of this paper is as follows:First,to maximize the energy efficiency of wireless multi-hop networks under FD,it applys the physical interference model and combines the constraints of achievable channel capacity in PHY,scheduling in MAC and routing in the network layer,which formulates a Mixed-Integer Linear Programming problem.Firstly,the methods which are piece-wise linearization technique and RLT are applied to linearize the nonlinear optimization problems.Then,it is proved that this method is feasible,and the optimal value of energy efficiency under different parameters is obtained through simulating.By comparing the simulation results under three different environments,it is proved that full duplex can effectively improve the energy efficiency of the network.Secondly,to maximize the secrecy rate wireless multi hop networks under FD,based on the physical layer security and full duplex,it combines scheduling in the PHY and routing in the network layer and achievable secrecy capacity as constraints,which formulates a Mixed-Integer Nonlinear Programming problem.Then,to solve the optimization problem,we apply the RLT and convex hull relaxation technology to linearize the nonlinear optimization problems,and obtain the approximate optimal solutions of the reformulated mixed integer linear optimization problem.Finally,based on the simulation results,we conclude by combining full duplex and physical layer security,it can be effectively improved that achievable secrecy rate of wireless multi-hop networks.