Resource Allocation Of Maritime Cognitive Radio Networks Based On Coalition Game

The increasing number of offshore wireless devices and the huge demand for high-speed communications have driven the development of offshore wireless communication technologies.In recent years,with the increasing number of maritime communications users,maritime spectrum resources have become increasingly scarce.Cognitive Radio(CR)just happens to be able to effectively reuse maritime spectrum resources,so this article applies cognitive radio to offshore wireless communications.The characteristic of CR is that it can learn the spectrum environment through perception and can adjust its scheme to make better use of the communication system with spectrum resources.Resource sensing and allocation involves scheduling of spectrum resources and power resources.From the perspective of overall system throughput and bandwidth utilization,resource allocation is a key issue that determines the performance of maritime Cognitive Radio Networks(CRNs).In this paper,through the study of various optimization technologies,the problem of resource allocation in maritime CRNs is studied.In particular:(1)Aiming at the defects in the process of coalition merger and split,a Single User Adjustment Coalition Formation Algorithm(SSUA)is proposed.Considering the problem of long-distance maritime transmission,the cooperative maritime CRNs spectrum sensing system model is built,the spectrum sensing strategy in maritime CRNs is studied.Apply the Coalition Game to the maritime cognitive radio scenario,then construct an architecture of a single Primary User(PU)and multiple Secondary Users(SU).Simulation results show that,compared with merge-and-split(M-S)method and non-cooperative sensing method,SSUA improves SU detection probability and make's the coalition obtain higher overall utility value.(2)It is proposed to use the Coalition of Secondary Users(CSUs)as the coalition relay point of the maritime cooperative relay system.Based on the basic research of a single secondary user as a relay node,combining the coalition to form a game algorithm,it is transformed into using the optimal coalition as a relay.When the leader of the coalition in the coalition obtains authorized channels,other members of the coalition also have the opportunity to use the remaining idle spectrum to complete their own data transmission.A practical low-complexity Optimal Power Resource Allocation(OPRA)strategy is proposed.Power control is the key to achieving spectrum sharing in the maritime CRNs.The power control technology uses different models and theories to optimize the transmission power of the CSUs and adaptively adjust the transmission power to ensure the quality of service(QoS)of users in the maritime CRNs.While achieving spectrum sharing.This problem can be transformed into a convex optimization problem with a view to reducing the dimension of the problem.The Lagrange multiplier method is used to optimize the system and obtain the optimal solution.The simulation results show that compared with other algorithms,the OPRA algorithm in this paper has higher overall throughput and transmission rate of the system.