| Summary: | 碩士 === 國立成功大學 === 電腦與通信工程研究所 === 104 === This paper targets on solving the high collision problem in the massive machine-to-machine communications. The main idea is to restrict the allowable number of contention to the low-energy devices (LEDs) by using the proposed make-or-break (MOB) backoff scheme such that the high-energy devices (HEDs) can have higher probability to attain time slots for data transmissions. In this fashion, the lifetime of the LEDs can also be prolonged. However, the restriction mechanism may detain the data forwarding process. To solve this dilemma, the adaptive frame structure is proposed to boost the data throughput. The analytical as well as simulation results demonstrate that with a huge amount of machine type devices (MTDs), the proposed scheme can outperform the conventional counterpart in the aspects of the head-of-line delay, energy efficiency and accommodation of the MTDs.
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