Research On Access Technology For Mobile Ad-Hoc Networks With Two-Layer Architecture

With the development of technology,the development ideas of unmanned swarm operations have been applied to military operations,and the networking and communication capabilities between unmanned system combat platforms will be crucial.The mobile ad hoc network(MANET)has been widely used in the field of military operations because of its self-organization and centerless characteristics.The traditional mobile ad hoc network adopts a flat network architecture,which has poor scalability,while the layered network architecture improves the stability and scalability of the network by layering the network and reasonably dividing the functions between different layers.In the mobile ad hoc network protocol stack,the media access control(MAC)protocol acts on the physical layer,which is directly related to the allocation of channel resources,and affects the fairness of communication between all nodes in the network and the network transmission performance.In order to ensure that information can be transmitted quickly and reliably in the complex communication environment of the battlefield,and the limited channel resources can be efficiently used to transmit information between nodes in the network,the research on the MAC protocol of mobile ad hoc networks is of great practical significance.This paper takes the mobile self-organizing network as the research entry point,and the specific work is as follows:1.Analyze the influence of the network topology structure of MANET on performance,and design a two-layer network architecture for mobile ad hoc networks.In the network the nodes are divided into two types: backbone nodes and ordinary nodes,and the corresponding working mechanism of node access to the network is planned.A node dynamic allocation strategy based on link quality is proposed,and the nodes in the network are prioritized according to the services they undertake.2.This paper studies the mainstream MANET access protocols,analyzes and compares the performance of several access technologies,and summarizes the advantages and disadvantages of various protocols.At the same time,a swarm intelligence optimization algorithm is introduced.Based on time division multiple access(TDMA),sparrow search algorithm(SSA)is innovatively applied to the time slot allocation mechanism of mobile ad hoc networks,and the original algorithm is optimized.A priority mechanism is added to the sparrow search algorithm.The characteristics of the mobile ad hoc network time slot allocation mechanism improve the location update formula,and then propose a MANET time slot allocation mechanism based on the sparrow search algorithm,which is named SSATDMA in this paper.3.This paper uses OMNet++ and Matlab to model the proposed mobile ad hoc network with two-layer architecture,adopts the proposed time slot allocation mechanism in the communication nodes,and compares and analyzes the performance of the SSA-TDMA and the existing TDMA-like protocols in different network simulation scenarios.The simulation results show that the time slot allocation mechanism proposed in this paper can effectively improve the channel utilization rate and node transmission success rate,reduce the end-toend transmission delay,and optimize the network performance as a whole.