An Energy-constrained Cooperative Jamming Scheme for Wireless Security Communication in Power IoT

With the widespread use of wireless communication in the power Internet of Things, wireless communication security is becoming increasingly important. Physical layer security uses the physical characteristics of wireless channels to ensure the security of information transmission. Besides, due to the low energy consumption of the sensor nodes, power consumption also needs to be considered in the power Internet of Things.To reduce system power consumption while ensuring the secure transmission rate of the power Internet of Things wireless communication system, this paper proposes a physical layer secure communication method based on a cluster collaboration interference strategy. Firstly, a secure communication model of the substation system is established, and multiple sensor nodes within the sink node cluster assist interference using received orthogonal codes. Secondly, the energy consumption required to complete one secure transmission process is defined as the secure transmission energy consumption, and the secure transmission energy consumption is used as the optimization objective. Finally, this paper uses genetic algorithm to optimize the collaborative interference strategy. Simulation results show that compared with the traditional genetic algorithm and the node random selection algorithm, the proposed algorithm can speed up convergence and reduce secure transmission energy consumption.