CAJ | 학술논문

无人机编队飞行时，可由控制站作为中心，通过定向天线与无人机交换遥控遥测信息。提出一种适用于有中心定向网络的动态时分信道接入机制，在没有同步装置时，结合异步、同步2种邻居发现算法进行邻居发现。动态分配信道，对不同优先级业务提供服务质量（ QoS）保障，提高时隙利用率；能够实现空间复用，解决定向天线存在的队列头阻塞问题，提高空间复用效率，很大程度上改善网络性能。在EXata网络仿真平台上进行了仿真验证，仿真结果表明，该算法能够有效提高网络吞吐量，降低时延。
무인궤편대비행시，가유공제참작위중심，통과정향천선여무인궤교환요공요측신식。제출일충괄용우유중심정향망락적동태시분신도접입궤제，재몰유동보장치시，결합이보、동보2충린거발현산법진행린거발현。동태분배신도，대불동우선급업무제공복무질량（ QoS）보장，제고시극이용솔；능구실현공간복용，해결정향천선존재적대렬두조새문제，제고공간복용효솔，흔대정도상개선망락성능。재EXata망락방진평태상진행료방진험증，방진결과표명，해산법능구유효제고망락탄토량，강저시연。
Using directional antennas,control station can act as a central node and exchange remote information with UAV fleet during the flight. The paper proposes a Dynamic?TDMA ( D?DTDMA) MAC mechanism for directional networks without synchronous equipment,which combines asynchronous and synchronous neighbor discovery algorithms.D?DTDMA implements a dynamic slot assign?ment algorithm,which provides QoS for traffics of different priorities,and has a high utilization of slot. It also realizes spatial reuse and solves the “head?of?line blocking” problem, obtaining a better network performance. Simulations on the Exata network simulation platform show that the algorithm can significantly increase the network throughput and reduce the delay.