Multiple Access Technology Research And Verification Platform Design For Wide-area Heterogeneous Integrated Network

With the rapid development of wireless communication,signal processing and data link technology,the modern battlefield environment is evolving with digitalization,informationization,and wide-area as the mainstream trend.Multi-area tactical units in air,space,ground and sea transmit control and command information to each other for cooperative operations.There are two communication scenarios.The first is the intra-area communication scene.Tactical units interact data with each other to fulfill mission requirements,but most communication areas are located in complex terrain with poor communication conditions,and tactical units are easy to be jammed.So it is necessary to design an anti-jamming low-latency and high-reliability multiple access protocol.The second is the inter-area communication scene.The line of sight between tactical units in different areas is blocked due to space constraints and cannot communicate directly.Therefore,satellite forwarding is needed to realize the over-the-horizon relay transmission of information flow and realize the interconnection of tactical platforms.However,there is currently a lack of visual verification platform to support and analyze the wide-area heterogeneous integrated network communication.Based on the above requirements,this paper mainly obtains the following two research results.(1)Aiming at the problem of anti-jamming communication in the intra-area communi-cation scene,statistical priority multiple access protocol SPMA uses time hopping and frequency hopping technology to make anti-jamming performance superior,but the existing SPMA protocol adopts a random or fixed selection strategy for time-frequency resource,which has poor dynamic adaptability and cannot guarantee the requirements of packet collision rate and delay.Therefore,this paper introduces a deep reinforcement learning algorithm to optimize the business distribution on the time hopping frequency hopping spectrum,and proposes a statistical priority multiple access protocol based on the energy intensity map EIM-SPMA.This protocol redefines the packet bursts split by user business group as agents.Each agent obtains the action through the state space and executes the action according to the same user principle to select time-frequency resources.The environment feedbacks rewards and observation results to the agent based on the energy intensity,priority level,collision unit constraints,and delay unit constraints of the resource block and then updates the state space.By interacting with the environment,the agent learns from a series of existing experiences,which are composed of states,actions and rewards,and optimizes the weights of the neural network to achieve the optimal target state.Finally,the protocol is simulated based on the deep learning platform,The results show that compared with SPMA random time hopping and frequency hopping scene,the EIM-SPMA protocol reduces the collision rate of user packet bursts and guarantees the delay requirements of different priority business group.(2)Aiming at the problem of platform interconnection in the inter-area communication scene,the physical test is difficult due to the integration of multi-area tactical units.Most of the existing technical platforms are network protocol simulation platforms.There is little research on the verification platform which integrates operation deployment and performance analysis.Therefore,this paper proposes a data link verification platform that adopts a unified message set and processing protocol by designing multiple software interactive interfaces and integrating the characteristics of different tools for display,calculation and operation.The verification platform mainly includes two parts: equipment terminal software and comprehensive simulation software.Among them,the equipment terminal software is deployed on the physical equipment terminal of the tactical unit to provide a visual operation and display window interface for the transmission of control instructions and business data between the tactical unit connected to it.Operators can perform equipment maintenance,packet transmission,data calculation,topology analysis and tactical scenario deduction on the tactical unit based on the software.The comprehensive simulation software is used to match the communication business scenarios and analyze the network performance of the tactical communication scenarios in the form of network simulation.Finally,this paper shows the operation effect diagram of the verification platform on the physical device terminal.The results show the feasibility of the verification platform under the wide-area heterogeneous integrated network communication.Furthermore,the verification platform solves the problem of inter-area communication interconnection,and makes up for the deficiency of the existing technology.