臺灣博碩士論文加值系統

本研究提出一個以相對低成本且更容易進行擴展之無線網路拓樸。使用具有Wi-Fi功能且兼具基礎單晶片韌體之nodeMCU，將其以無線網路進行串聯使其涵蓋範圍擴大，並將資料分散由不同的裝置存取，且所有的無線存取點(Access point, AP)的密碼設定皆不同，改善過往同樣是使用串聯擴大涵蓋範圍會使所有的無線網路分享器視為是單一個無線網路分享器之缺點。過去建立的系統完全仰賴身為主控端的無線網路分享器，一旦該裝置異常可能造成系統無法使用，本研究具有修復連線使單一裝置出現異常會由其他裝置進行替補。使用網頁進行監控的方式受制於URI（統一資源識別元，Uniform Resource Identifier），被人得知有什麼參數後會使得裝置不夠隱密，容易受到有心人士進行控制以獲取資訊，本論文將控制指令進行加密使其不會顯露出相關動作資訊。故本研究在使用網頁進行監控有較為良好的安全性，且不容易因為主控端異常造成連線失效，也可以自行添加感測器，然而使用的Wi-Fi模組並沒有可以比擬電腦的運算能力，且連線能力也較市售的無線網路分享器弱，不能處理太多連線裝置，未來需要再以更精簡的演算法或者有更高運算能力的單晶片進行建構。

This paper considers a wireless network topology that is relatively low cost and easier to extend. Use an IoT platform named NodeMCU, which is based on the ESP-12 module and includes firmware which runs on the ESP8266 Wi-Fi SoC. Connect them to extend the Wi-Fi coverage, and obtain different data by different devices to distribute data access. Passwords of the Access Points are different. These can improve that connect Wi-Fi routers in the past cause them to be regarded as a single Access Point. The system completely relies on the Wi-Fi router that is the master. Once the Wi-Fi router is abnormal, it will cause damage to the system. Thus, this study considers one way to repair connection by replaced the abnormal device by another device. The way to monitor using web browser is relied on URI (Uniform Resource Identifier), any parameters is known by others will make the device less secure and be easily controlled by others to obtain information. Therefore, encrypt the command so that do not show parameters of action. This study has a relatively good security when using web pages for monitoring, connection will not disconnect due to damage of master, also can add sensors. However, the platform used cannot compare with computer, and the connection capability is weaker than the commercially available Wi-Fi routers. It cannot handle too many connection devices. In the future, can use a more streamlined algorithm or constructed with a advanced platform.

摘 要 i
ABSTRACT ii
誌 謝 iii
目 錄 iv
表 目 錄 vii
圖 目 錄 viii
第一章 緒論 1
1-1 前言 1
1-2 研究動機與目的 2
第二章 理論基礎 5
2-1 網路拓樸 5
2-1-1 星狀網路拓樸(Star Topology) 5
2-1-2 樹狀網路拓樸(Tree Topology) 5
2-1-3 網狀網路拓樸(Mesh Topology) 5
2-2 加密理論 6
2-2-1 加密(Encrypt) 6
2-2-2 對稱性加密演算法(Symmetric-key algorithm) 7
2-2-3 非對稱性加密演算法(asymmetric cryptography) 8
2-2-4 數位簽章(Digital Signature) 9
2-4 RSA簡介 11
2-3 ICANN 12
第三章 實驗方法 13
3-1 架構設計 13
3-1-1 限制條件 13
3-1-2 有效涵蓋範圍 13
3-1-3 無線分散系統 15
3-1-4 修復連線 17
3-2 IP分配概念 21
3-2-1 分層結構 21
3-2-2 橫向區分 21
3-2-3 縱向區分 25
3-3 差異比較 28
3-4 URI 30
3-5 加密機制 31
第四章 結果與討論 33
4-1 系統流程圖 33
4-2 實驗架構 38
4-3 缺陷 44
第五章 結論 46
5-1 總結 46
5-2 未來展望 46
參考文獻 48

[1] Bang Wang, Wei Wang, Vikram Srinivasan, and Kee Chaing Chua, "Information Coverage for Wireless Sensor Networks," IEEE COMMUNICATIONS LETTERS, 2005.
[2] Yao Zhao, Jianliang Yan, Hua Zou, “Study on network topology discovery in IP networks,” IEEE International Conference on Broadband Network and Multimedia Technology (IC-BNMT), 2011.
[3] David Plets, Wout Joseph, Kris Vanhecke, Emmeric Tanghe and Luc Martens, “Coverage prediction and optimization algorithms for indoor environments,” EURASIP Journal on Wireless Communications and Networking, 2012.
[4] Bharati Wukkadada, Kirti Wankhede, Ramith Nambiar, and Amala Nair, "Comparison with HTTP and MQTT In Internet of Things (IoT)," in 2018 International Conference on Inventive Research in Computing Applications (ICIRCA), 2018.
[5] Wolfgang Bziuk, Cao Vien Phung, Jasenka Dizdarević, and Admela Jukan, "On HTTP performance in IoT applications: An analysis of latency and throughput," in 2018 41st International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), 2018.
[6] Ivan Dolnák, and Ján Litvik, "Introduction to HTTP security headers and implementation of HTTP strict transport security (HSTS) header for HTTPS enforcing," in 2017 15th International Conference on Emerging eLearning Technologies and Applications (ICETA), 2017.
[7] Nikhil Sahni, Joy Bose, and Kaushik Das, "Web APIs for Internet of Things," in 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI), 2018.
[8] Dominique Guinard, Vlad Trifa, and Erik Wilde, "A resource oriented architecture for the Web of Things," in 2010 Internet of Things (IOT), 2010.
[9] Rajpreet Singh, and Sanjeev Dewra, "Performance evaluation of star, tree & mesh optical network topologies using optimized Raman - EDFA Hybrid Optical Amplifier," in 2015 International Conference on Trends in Automation, Communications and Computing Technology (I-TACT-15), 2015.
[10] M. Hillman, "An Overview of ZigBee Networks A guide for implementers and security testers," in MWR InfoSecurity, 2016, pp. 1-12.
[11] Nicolas Le Sommer, Lionel Touseau, Yves Mahéo, Maël Auzias, and Frédéric Raimbault, "A Disruption-Tolerant RESTful Support for the Web of Things," in 2016 IEEE 4th International Conference on Future Internet of Things and Cloud (FiCloud), Vienna, Austria, 2016.
[12] Qasem AbuAl-Haija, Mashhoor AlTarayrah, HasanAl-Qadeeb, and Abdulmohsen Al-Lwaimi, "A Tiny RSA Cryptosystem based on Arduino Microcontroller Useful for Small Scale Networks," Procedia Computer Science, pp. 639-646, 15 8 2014.
[13] S. R. Jaffe, Design of Inexpensive and Easy To Use DIY Internet of Things Platform, 2016.
[14] Lamir Shkurti, Xhevahir Bajrami, Ercan Canhasi, Besim Limani, Samedin Krrabaj, and Astrit Hulaj, "Development of ambient environmental monitoring system through wireless sensor network (WSN) using NodeMCU and “WSN monitoring”," in 2017 6th Mediterranean Conference on Embedded Computing (MECO), 2017.
[15] T Nimi, and P Samundiswary, "Comparative analysis of ZigBee network with tree and mesh topology for different range of frequencies," in 2017 2nd International Conference on Communication and Electronics Systems (ICCES), 2017.
[16] Jianming Liao, and Yu Liu, "Optimization on channel assignment based on stave principle in star-topology WirelessHART networks," in The 2010 International Conference on Apperceiving Computing and Intelligence Analysis Proceeding, 2010.
[17] 莊國強，陳凱俞, “可自由擴展積木堆疊多層式網路拓樸,” 2019第17屆微電子技術發展與應用研討會, 2019.
[18] https://blog.xuite.net/ikc168/twblog/161994505-WDS%E8%A8%AD%E5%AE%9A%E6%95%99%E5%AD%B8.
[19] Shigeto Tajima, Teruo Higashino, Nobuo Funabiki, and Toru Nakanishi, "A WDS Clustering Algorithm for Wireless Mesh Networks," in 2007 IFIP International Conference on Wireless and Optical Communications Networks, 2007.
[20] Xuebiao Yuchi, Xiaodong Lee, and Lanlan Pan, "Dealing with temporary domain name issues in the DNS," in 2016 IEEE Symposium on Computers and Communication (ISCC), 2016.