Hybrid Multiple Access Methods Based On The Traffic Status For A Spacecraft Network

Modern information war is already out of simplification warfare, turning to thesystem with the system confrontation. Tactical data link connects the each combatunit and shares battlefield information in time, to shorten the reaction time andimprove operational efficiency, becoming the core factor to dominate the battlefieldsituation and the outcome of war. The MAC protocol describes each node in thenetwork access channel when need to comply with the rules, and is important for areasonable, fair and efficient utilization of network resources.In this paper, under the background of a spacecraft cooperative network, themain research content is rapid access method for network node. Combined with theever-changing business status, design the hybrid multiple access method whichmeets the demand of practical application, to solve the problem of reasonableutilization for wireless resource in the collaborative network, improving resourceutilization and reducing transmission delay.First of all, the domestic and foreign development situation of tactical data linkis introduced and focused on a variety of MAC protocols which are used in theexisting tactical data link. Through the analysis, TDMA is the preferred multipleaccess method for air-to-air and air-to-ground tactical data link.Secondly, build the basic framework of a spacecraft network. Select thehierarchical network topology structure which has good scalability and flexibility,simplifying network management. Combined with business characteristics indifferent flight phases, design a hybrid multiple access method based on TDMA.Determine the network initialization scheme and node access/exit plan, to solve theproblem of dynamic network, in order to adapt to the rapidly changing battlefield.Once again, as an important part of hybrid multiple access methods, thereservation multiple access method based on compressed sensing is put forward,which can effectively shorten the channel reservation time, improving the networkdata transmission efficiency.Finally, through the simulation analysis, the conclusion has been proposed thataimed at the changing business status, hybrid multiple access methods maximizenetwork performance, compared to any single access method. As the prototype ofadaptive multiple access methods, the proposed hybrid multiple access methods willhave a more profound significance.