Dynamic spectrum allocation method for the requirements of real-time updating and secure transmission of the ubiquitous spectrum information

Aiming at the problem of low efficiency of spectrum allocation under the dynamic update scheme of ubiquitous spectrum information (SI) and the requirements of secure transmission in the dynamic spectrum management (DB-DSM), we consider a dynamic spectrum allocation scenario limited by the dynamic update scheme of ubiquitous SI, and establish a secure transmission model of SI to deal with the interception threat of malicious nodes. The secure transmission of SI is realized by optimizing the allocation of channel and power resources. Then we propose a dynamic spectrum allocation method based on the SI update scheme and the covert transmission of SI. The complex nonlinear and non-strict convex optimization problem is decomposed into a simple strict convex optimization problem and an integer linear optimization problem using element reduction processing. We design a joint optimization algorithm including a DC optimization and a linear integer optimization to optimize the dynamic spectrum allocation. Simulation results show that the proposed method can ensure that the heterogeneous wireless network can quickly find the approximate optimal spectrum allocation scheme and obtain the optimal sum transmission rate to meet the minimum transmission requirements of SI.