Based On QoS Routing Strategy Using Game For Heterogeneous Wireless Network In Smart Meter

The phasor measurement unit(PMU)and smart meter(SM)in smart grid transmit the data and parameters measured by PMU and SM to control center(CC)through heterogeneous wireless network.It is particularly important to choose a reliable,stable and secure data transmission link to transmit massive terminal data to CC for data analysis and processing.In the traditional game model of smart grid data routing,sensor nodes need to obtain the information of all sensor nodes’ game states to make the next routing decision.Based on the above analysis,firstly,this paper models the data routing process of smart grid into a game model of network formation,and we propose a graph distributed data transmission routing algorithm based on secure routing.In this game model,a novel utility function of quality of service(QoS)is designed.The new utility function not only considers the delay and packet loss rate of the system,but also considers the safety factor of the system.Secondly,in view of the fact that each sensor node in the heterogeneous network of smart grid obtain the game information of all sensor nodes with another system resource,we propose a conjecture based incomplete information learning algorithm for data transmission of smart grid,that is,it does not need each node to obtain the game state information of all other nodes,and it can optimize and converge its own strategy under the incomplete information,so as to greatly reduce the system overhead caused by information interaction between sensor nodes.Finally,the above two algorithms are simulated under the condition of diversified traffic data.The simulation results show that: the game algorithm one(based on secure route data transmission path algorithm)and the algorithm two(based on incomplete information learning algorithm)in three data services.In the case of three separate data services(grid operation data: God,equipment status data: ESD,customer measurement data: CMD),they get different stable routing solutions respectively.For the diversified data services,the game mechanism of algorithm one proposed has significantly improved the transmission performance compared with the direct transmission algorithm and the nearestneighbor algorithm;In the case of mixed and diversified data services,the routing strategy is no longer a simple superposition or combination of the three services,it is formed by the interaction of the three strategies to maximize the utility of the whole network.In addition,the reinforcement learning algorithm based on incomplete information(algorithm two)proposed in this paper is very close to the average cumulative expected utility under the fictitious game algorithm with complete information(algorithm one)on the average cumulative expected utility.When the number of network nodes is 12,the utility of incomplete learning algorithm(algorithm two)is 95.3% of complete information game algorithm(algorithm one).At the same time,the algorithm proves that there is a complex interaction between concentrators.Finally,when the heterogeneous wireless network is attacked,our algorithm can adaptively adjust the data transmission route to ensure the security of parameters and measurement data of the smart grid.