Design Of High Speed Aeronautical Vehicle Cluster Resource Allocation Technology And Low Delay MAC Protocol

With the development of wireless communication technology,aerial vehicle cluster has been widely used in the military field.The Aeronautical Ad Hoc Networks(AANET),which formed spontaneously in the air by aircraft clusters,having wide coverage,fast networking or dismantling speed,and strong damage resistance,can perform much more complex tasks.Due to the influence of environmental factors and the limitation of available bandwidth,the reliable communication of AANET has more strict requirements on channel delay and throughput.The Media Access Control(MAC)protocol used in AANET now,reduces the transmission delay,but neglecting the cost of resource allocation,which is not comprehensive to improve the throughput.Therefore,it is of great significance to study the resource allocation mechanism with low cost to realize efficient cooperative operation.The main work is summarized as follows:(1).Analyze the characteristics of AANET and three media access control protocols.The typical competing protocol CSMA/CA(Carrier Sense Multiple Access with Collision Avoidance),which is suitable for light-load network,the delay is increased due to competition conflicts with the heavy load.Distributed fixed TDMA(Time Division Multiple Access)is the main scheduling protocol,having stable delay.But the fixed allocation mechanism lacks flexibility,having low resource utilization.Hybrid protocols combine distributed fixed TDMA with carrier listening and random backoff,which is beneficial to improve the utilization efficiency of idle slots.Through the simulation to verify the performance of the protocol,the reasons why the three types of protocols are not applicable to the low delay and heavy load network are analyzed.It is necessary to further design an efficient MAC protocol which can save the cost.(2).Research and simulation of ITT-TDMA(Idle Time Slot Transfer TDMA).By analyzing the M/D/1 queuing system with vacation,we know that the frame length is the main factor affecting the delay.Based on the fixed TDMA,the algorithm of idle time slot resource allocation was studied and ITT-TDMA protocol is designed to solve the problem that the competition window of hybrid protocols is high proportion in short frame length.Ensuring the basic communication ability of nodes and adding the "Transferee" in SI(Slot Information)to realize active authorization of idle slots.Compared with competing Windows,SI has lower costs and there is no competing conflict.Finally,the delay and throughput performance of the protocol are analyzed by simulations.(3).Research and simulation of Full Duplex ITT-TDMA.For the network with frequent node interaction,the throughput of half-duplex mode is limited.Based on the principle of full duplex communication,a full duplex link scheduling algorithm is proposed and a full duplex ITT-TDMA protocol suitable for short frame length is designed.Broadcast is used instead of handshakes to schedule the secondary link.The protocol allows Transferee nodes to carry out full-duplex communication.The packets are sent in advance to further reduce the delay and improve the throughput.