DESPITE a population ofonly 27,000,Achang na-tionlity in China‘s YunnanProvince has along history. As ear-ly as the second century B.C.theforefathers of the Achang peopleappeared in the valleys of the Jin-sha,Lancang...DESPITE a population ofonly 27,000,Achang na-tionlity in China‘s YunnanProvince has along history. As ear-ly as the second century B.C.theforefathers of the Achang peopleappeared in the valleys of the Jin-sha,Lancang and Nu rivers in to-day’s northwestern Yunnan Prov-ince.Later,some of them moved展开更多
The medium access control(MAC) protocol for indoor visible light communication(VLC) with energy harvesting is explored in this paper. The unfairness of throughput exists among devices due to the significant difference...The medium access control(MAC) protocol for indoor visible light communication(VLC) with energy harvesting is explored in this paper. The unfairness of throughput exists among devices due to the significant difference of their energy harvesting rates which changes with distance, acceptance angle and the obstruction probability. We propose an energy harvesting model, a new obstruction probability model and an energy adaptive contention algorithm to overcome the unfairness problem. This device can adjust its contention window according to the energy harvesting rate. As a result, the device with lower energy harvesting rate can get shorter contention window to improve its transmission opportunity. Simulation results show that our MAC protocol can achieve a higher degree of fairness.展开更多
文摘DESPITE a population ofonly 27,000,Achang na-tionlity in China‘s YunnanProvince has along history. As ear-ly as the second century B.C.theforefathers of the Achang peopleappeared in the valleys of the Jin-sha,Lancang and Nu rivers in to-day’s northwestern Yunnan Prov-ince.Later,some of them moved
文摘The medium access control(MAC) protocol for indoor visible light communication(VLC) with energy harvesting is explored in this paper. The unfairness of throughput exists among devices due to the significant difference of their energy harvesting rates which changes with distance, acceptance angle and the obstruction probability. We propose an energy harvesting model, a new obstruction probability model and an energy adaptive contention algorithm to overcome the unfairness problem. This device can adjust its contention window according to the energy harvesting rate. As a result, the device with lower energy harvesting rate can get shorter contention window to improve its transmission opportunity. Simulation results show that our MAC protocol can achieve a higher degree of fairness.
