| Summary: | 碩士 === 國立高雄師範大學 === 光電與通訊工程學系 === 107 === In the future, Machine-to-Machine (M2M) communication in the smart grid will be indispensable, but technological advancements are accompanied by a huge increase in the amount of data and the number of devices. Communication networks begin facing problems such as congestion and spectrum resource shortage. These reasons combined, pose a challenge to the development of M2M communication. Thence, finding a way to effectively use the existing spectrum is an important issue for a large number of M2M communication devices.
The main purpose of this study is to add Cognitive Radio technology to M2M communication, and use the Packet Reservation Multiple Access (PRMA) as the standard protocol. The proposed MAC protocol referring to the methods of the predecessors as well as the related literature on energy harvesting presents to use the MTCG energy of unlimited power and the energy of the primary user (PU). By recharging the MTCD with limited power we can expect to achieve the effect of improving system performance.
Through the C language simulation, we examined the difference between the effects of adding Energy harvested from PU and Energy harvested from PU and MTCG. In this simulation, we have two performances, PU Interference and Throughput, as indicators of evaluation.
The final simulation results show that after adding energy harvested from PU and MTCG, compared with energy harvested from PU, the energy harvesting scheme has proved better efficiency improvement under the proposed performance index. Therefore, we are able to confirm that the system that has joined the energy harvesting has indeed improved the performance of the communication system.
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