電機資訊學院: 電信工程學研究所指導教授: 陳光禎王玉玨Wang, Yu-ChuehYu-ChuehWang2017-03-062018-07-052017-03-062018-07-052015http://ntur.lib.ntu.edu.tw//handle/246246/276470穿戴式裝置的出現，為機器與機器通訊帶來新型態的應用，卻也為 如何延長裝置運作時間(存活時間) 帶來新的挑戰。和傳統的機器與機 器通訊應用，「感應裝置」相比，穿戴式裝置的電池尺寸保持小巧，因 此能量擷取被認為是可解決穿戴式裝置能量短缺問題的嶄新技術。然 而與感應裝置不同的點為，對於穿戴式裝置來說，無法承受隨著能量 耗盡而來的頻繁開關機。為了避免裝置能量耗盡，穿戴式裝置應該大 量的減少，被視為是機器與機器通訊中最大的耗損，控制訊號的傳輸。 但在沒有控制訊號後，評定穿戴式裝置運用好壞的關鍵指標，「體驗品 質」可能無法被保證。為了成功地實現穿戴式裝置的運用，我們對於 體驗品質與穿戴式裝置存活時間中的最佳權衡進行研究。為了達到這 個目的，我們發展了一套可用來模擬穿戴式裝置進行無線接取的普遍 狀態機，並以數值解的方式得到了對於穿戴式裝置來說，最佳的無線 接取策略，可同時在體驗品質的保證下，提供裝置存活時間的最大化。 我們的策略為穿戴式裝置的運作提供了一套具有前瞻性的解決方法， 並為其後的理論發展奠定了基礎。Wearable devices (WDs) empowering a new type of machine-to-machine (M2M) communications create an unprecedented challenge of operation time (lifetime) extension. Similar to a sensor with a small form factor of battery, energy harvesting is a promising technology for WDs to compensate energy shortage. However, frequently shutting down and rebooting a device (allowable for a sensor) due to energy exhaustion is unacceptable for WDs. To avoid energy exhaustion, a WD should largely decrease the control signaling transmissions those have been regarded as the major overhead in M2M communications. Without the control signaling, however, the most crucial quality-of-experience (QoS) may not be guaranteed in WD applications. To successfully practice WDs, we shall consequently strike the optimum tradeoff between QoE and lifetime. For this goal, in this paper, a general state machine to model the radio access of a WD is developed, by which the optimum radio access strategy for each WD is analytically derived to maximize the lifetime while guaranteeing QoE for all WDs. Our scheme provides a pioneering solution for sustainable WD operations to serve the urgent needs and pave theoretic foundations of booming WD applications.2180997 bytesapplication/pdf論文公開時間: 2015/8/25論文使用權限: 同意有償授權(權利金給回饋學校)機械與機械通訊能量擷取體驗品質存活時間M2M communicationsenergy harvestingquality of experiencelifetimethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/276470/1/ntu-104-R02942119-1.pdf