根據European Telecommunication Standards Institute (ETSI) M2M標準，物聯網架構分為感知層、網路層以及應用層，在這三層架構裡包含了M2M device、M2M gateway以及M2M server等各種節點。隨著網路和硬體技術的發展，物聯網節點變得越來越多元化，而這些節點使用的應用層協定未必相同。當物聯網節點在傳輸資料時，當下的網路狀況、使用的應用層協定以及傳輸的資料量皆有可能影響到資料傳輸效能。雖然目前已有許多文獻在做物聯網相關協定的效能分析，但是較少文獻會在不同的網路狀況下評估這些協定。
本論文以ETSI M2M架構為基礎，提出一種使M2M gateway具有管理協定的機制，以及一種使M2M gateway和M2M server在互相溝通時能夠選擇適合協定的機制。此外，我們也在不同的網路狀況以及不同的傳輸資料量下評估各個物聯網相關協定。最後，我們在真實環境下建立實際系統，證明系統可行性。

According to the European Telecommunication Standards Institute (ETSI) M2M standard, IoT architecture can be divided into three layers, namely, (1) perception layer, (2) network layer, and (3) application layer. The three layers include various M2M nodes such as M2M devices, M2M gateways, and M2M servers. With the development of network and hardware technologies, IoT nodes become more diversified. However, the application layer protocols used by these nodes may not be the same. When IoT nodes are transmitting data, the network condition, the application-layer protocol used by IoT nodes, and the transmitted data size are likely to affect the data transmission efficiency. While the analysis of application-layer protocols related to IoT has been extensively investigated, the analysis of application-layer protocols related to IoT under different network conditions is relatively unexplored.
In this thesis, we proposed an application-layer protocol management mechanism based on ETSI M2M architecture, which enables M2M gateway to manage application-layer protocols. Besides, we also proposed a selection mechanism based on ETSI M2M architecture, which enables M2M gateway and M2M server to choose an appropriate application-layer protocol when M2M gateway and M2M server are transmitting data to each other. Moreover, we conducted experiments of various application-layer protocols related to IoT under various network conditions and various transmitted data size. Finally, we built an actual system in the real environment to prove the feasibility of the system.

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