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Improving Wi-Fi Performance using Smart Access Point : 스마트 무선공유기를 이용한 와이파이 성능 향상
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 김종권 | - |
dc.contributor.author | 김기석 | - |
dc.date.accessioned | 2017-07-14T02:36:03Z | - |
dc.date.available | 2017-07-14T02:36:03Z | - |
dc.date.issued | 2017-02 | - |
dc.identifier.other | 000000140748 | - |
dc.identifier.uri | https://hdl.handle.net/10371/122683 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 컴퓨터공학부, 2017. 2. 김종권. | - |
dc.description.abstract | Wireless network is constantly expanding due to their superior accessibility and convenience when compared to wired networks. In the meanwhile, as physically limited bandwidth of wireless networks becomes increasingly congested, it is suffering from performance degradation. Although TCP is widely adopted regardless of wired or wireless networks, it is fundamentally designed and optimized for wired networks. Furthermore, recent advances of combo-modules that enable two or more network interfaces to share an antenna introduce a new challenge of Cross Technology Interference (CTI). In this paper, we identified redundant acknowledgement process across multiple layers during TCP transmission, and investigated root causes of interference pattern in combo-modules which induce transmission failures. Then we suggest two novel AP-side solutions called I-ACK (Implicit Acknowledgement) and Smart AP. I-ACK eliminates overhead caused by redundancy in TCP transmission procedure, and Smart AP stands strong against malfunction of combo-modules. We implemented these schemes on off-the-shelf AP and demonstrated the effectiveness in an anechoic chamber where external noise is blocked. | - |
dc.description.tableofcontents | CHAPTER Ⅰ: Introduction 1
1.1 Background 1 1.2 Goal and Contribution 4 1.3 Thesis Organization 5 CHAPTER Ⅱ: Related Work 6 2.1 Wi-Fi Performance Issue 6 2.2 Wi-Fi/Bluetooth Coexistence Issue 7 CHAPTER Ⅲ: Understanding the Performance of Wi-Fi 9 3.1 TCP Data Transmission in Wireless Networks 9 3.2 Operation of Combo-modules 12 CHAPTER Ⅳ: Proposed Schemes 16 4.1 Implicit ACK (I-ACK) 16 4.2 Smart AP 18 CHAPTER Ⅴ: Evaluation 20 5.1 Experiment Setup 20 5.2 Implicit ACK (I-ACK) 22 5.3 Smart AP 23 5.4 Mixed Scheme 24 CHAPTER Ⅵ: Conclusion 25 BIBLIOGRAPHY 26 초 록 28 | - |
dc.format | application/pdf | - |
dc.format.extent | 1688722 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | WiFi | - |
dc.subject | Access Point | - |
dc.subject | TCP | - |
dc.subject | Cross-Layer Approach | - |
dc.subject | Combo-modules | - |
dc.subject | Power Saving Mode | - |
dc.subject | Coexistence | - |
dc.subject.ddc | 621 | - |
dc.title | Improving Wi-Fi Performance using Smart Access Point | - |
dc.title.alternative | 스마트 무선공유기를 이용한 와이파이 성능 향상 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Kiseog, Kim | - |
dc.description.degree | Master | - |
dc.citation.pages | 36 | - |
dc.contributor.affiliation | 공과대학 컴퓨터공학부 | - |
dc.date.awarded | 2017-02 | - |
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