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전송률 향상을 위한 거리정보 기반 VHF Data Link MAC 기법
장형준 ( Hyung Jun Jang ),장지녕 ( Ji Nyoung Jang ),구자열 ( Ja Yeul Ku ),임재성 ( Jae Sung Lim ) 한국항공운항학회 2012 한국항공운항학회지 Vol.20 No.4
VDL(VHF Data Link) Mode E uses TDMA(Time Division Multiple Access) based aeronautical communication technologies for airborne environments. In the VDL Mode E,aircraft uses RR(Reservation Requests) slot to request data slot. However, RR needs a long guard time, since aircraft communication spans a considerable distance. The more number of aircrafts causes a larger amount of guard times which can make a throughput decreased. In this paper, we propose an enhanced MAC to reduce the guard time by using the distance information of aircraft. The ground station sends management data including time stamp. And then all aircraft can measure their distance from the ground station.