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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
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dc.contributor.advisor | 陳少傑(Sao-Jie Chen) | |
dc.contributor.author | Ren-Hao Wu | en |
dc.contributor.author | 吳仁豪 | zh_TW |
dc.date.accessioned | 2021-06-08T00:08:41Z | - |
dc.date.copyright | 2013-08-14 | |
dc.date.issued | 2013 | |
dc.date.submitted | 2013-08-09 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17360 | - |
dc.description.abstract | 隨著行動裝置使用率的提升和無線網路技術的快速發展,多種無線網路服務已部署於世界各地。然而,在台灣的台北市,雖然政府提供許多免費使用的Wi-Fi熱點,但是無線網路的涵蓋範圍卻是有限的,移動到涵蓋範圍間的區域將會造成網路斷線的情況發生,這對於需要高穩定性傳輸的醫療服務是個重大的挑戰。在本篇論文中,我們設計了一個行動感知無線電之中介軟體,用以改善上述所提的網路連線問題,感知無線電能夠感知周遭的環境並且將頻譜使用率最佳化,因此中介軟體負責整合現有的無線通訊系統,在異質網路下提供無接縫通訊的服務,保持無線網路連線的連續性並且避免在網路切換過程中遺失網路封包。最後我們移植行動感知無線電之中介軟體至嵌入式系統中,能夠在不更改現有的系統架構下,相容於現實的網路環境中。 | zh_TW |
dc.description.abstract | With the increasing use of hand-held devices and the rapid development of wireless network technology, many kinds of radio access technologies have been deployed around the world. However, in Taipei City, Taiwan, although we have many free Wi-Fi hotspots to use, the coverage of wireless network is limited such that wireless network connection has sometimes dropped when moving between the coverage gaps. It is crucial for medical services which require high-performance connectivity to maintain a stable communication. In this Thesis, we designed a mobile middleware for cognitive radio to improve the wireless communication link. Cognitive radios have the ability to sense their operating environment and optimize the spectrum usage, so the mobile middleware is responsible for integrating the existing wireless communication systems with a seamless communication service in the heterogeneous network environments. Therefore, it is important to develop a mechanism to keep the wireless connection continuous and avoid packets loss during network switch. Moreover, we ported the proposed seamless mobile communication middleware into an embedded system, which is compatible with the actual network environment without the need of changing the original system architecture. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T00:08:41Z (GMT). No. of bitstreams: 1 ntu-102-R00943081-1.pdf: 2205045 bytes, checksum: 76505c7c8051f0bf9c9a753371979969 (MD5) Previous issue date: 2013 | en |
dc.description.tableofcontents | ABSTRACT i
LIST OF FIGURES v LIST OF TABLES vii CHAPTER 1 INTRODUCTION 1 1.1 Motivation 1 1.2 Objective 3 1.3 Thesis Organization 5 CHAPTER 2 BACKGROUND 7 2.1 Seamless Communication 7 2.1.1 Seamless Connectivity 9 2.1.2 Intra-cell Handoff 10 2.1.3 Inter-cell Handoff 10 2.2 Decision Algorithm 11 2.2.1 Cognitive Radio 11 2.2.2 ARALF Lite 11 2.3 Embedded System 13 CHAPTER 3 SYSTEM OVERVIEW 15 3.1 Communication Protocol 15 3.1.1 Transport Layer Protocol 17 3.1.2 Network Layer Protocol 20 3.2 System Implementation 20 3.2.1 System Architecture 21 3.2.2 Middleware Platform 27 3.2.3 Mobile Medical Services Application 30 CHAPTER 4 EXPERIMENTAL RESULTS AND DISSCUSION 33 4.1 Experimental Platform and Setting 33 4.2 Results of Handoff Test 37 4.3 Measurements of Moving Situation 39 4.4 Discussion 46 CHAPTER 5 CONCLUSION 49 REFERENCE 51 | |
dc.language.iso | en | |
dc.title | 應用於醫療服務之行動感知無線電之中介軟體 | zh_TW |
dc.title | Mobile Cognitive Radio Middleware for Medical Services | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 林伯星(Bor-Shing Lin),熊博安(Pao-Ann Hsiung),顧孟愷(Mong-Kai Ku) | |
dc.subject.keyword | 感知無線電,行動中介軟體,無接縫通訊,嵌入式系統, | zh_TW |
dc.subject.keyword | Cognitive Radio,Mobile Middleware,Seamless Communication,Embedded System, | en |
dc.relation.page | 54 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2013-08-12 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電子工程學研究所 | zh_TW |
顯示於系所單位: | 電子工程學研究所 |
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