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에너지 효율 극대화를 위한 Surface Fitting 기반 중계기 전력 최적화 방법
장재용(JaeyongJang),임기호(Kiho Lim),정진곤(JingonJoung) 대한전자공학회 2019 대한전자공학회 학술대회 Vol.2019 No.6
Recently, several relay systems utilizing unmanned aerial vehicles (UAV) as RNs have been studied to extend the coverage of communications. However, there are still some challenges to be addressed because of the limited resources, i.e., battery. Since the battery capacity of UAV is limited and the battery charge is difficult in the air, it is very important to manage energy efficiently to prolong the better lifetime of UAV. To solve this issue, we propose a power control (PC) method that finds the optimal transit power of RN to enhance the energy efficiency (EE) of RN. A two-dimension surface fitting method is used and a quadratic polynomial surface function about optimal transmit power of RN is obtained. With this proposed function, our experiment results show that the proposed PC method can improve EE significantly compared to the fixed PC method and the battery life of RN can be extended.