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研究生:蔡傑智
論文名稱:高頻寬藍芽擷取點之設計與實作
論文名稱(外文):A Design and Implementation of a High Bandwidth Bluetooth Access Point
指導教授:張瑞川張瑞川引用關係
指導教授(外文):Prof. Ruei-Chuan Chang
學位類別:碩士
校院名稱:國立交通大學
系所名稱:資訊科學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:英文
論文頁數:54
中文關鍵詞:藍芽擷取點高頻寬頻道間干擾減少干擾
外文關鍵詞:Bluetooth Access Pointhigh bandwidthinter-channel interferenceinterference mitigation
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藍芽是近三年來受到廣泛注意的無線通訊技術之一,它不僅是小型裝置之間互相溝通的媒介,也是手持裝置連上網際網路的方法之一。在這篇論文裡,將會描述一個嵌入式藍芽擷取點的實作細節。在此藍芽擷取點中,採用了以ARM7TDMI為基礎的Samsung 4510B微型控制器,使用µClinux作為嵌入式作業系統,並採用開放原始碼的藍芽軟體 — BlueZ。此藍芽擷取點是依Bluetooth LAN Access Profile所設計,所有符合Bluetooth LAN Access Profile規範的裝置皆可透過此藍芽擷取點連上網際網路。
由於藍芽目前傳輸速率不高,在應用上受到許多限制,因此需要設計一個高頻寬的藍芽擷取點。在一個藍芽擷取點裡放入多個藍芽模組,是提高藍芽擷取點頻寬最直接的方法,但是藍芽模組之間互相產生的干擾,將會對系統的效能造成影響。在這篇論文裡,將會對藍芽模組間相互干擾的問題做理論上的分析,並提出兩個方法 — Bluetooth Clock Shifting Method和Specific Bluetooth Address Method來減少藍芽模組間的相互干擾。

Bluetooth is an emerging wireless technology over the past three years. It not only provides inter-connectivity between small devices, but also makes Internet connectivity for handheld devices possible. The implementation details of an embedded Bluetooth Access Point are described in this thesis. An ARM7TDMI-based microcontroller, the Samsung 4510B, is adopted in the Bluetooth Access Point, and µClinux is adopted as the embedded operating system. An open source Bluetooth stack, BlueZ, is included to provide Internet connectivity via Bluetooth LAN Access Profile.
Due to the low data rate of Bluetooth, the design of a High Bandwidth Bluetooth Access Point is demanded urgently. To host multiple Bluetooth channel in a single Bluetooth Access Point is a straightforward solution, however, the inter-channel interference would affect the system throughput. A theoretical analysis of inter-channel interference of a multi-channel Bluetooth Access Point is shown in this thesis, and two methods, Bluetooth Clock Shifting Method and Specific Bluetooth Address Method, for mitigating the inter-channel interference are also proposed in this thesis.

論文摘要 1
ABSTRACT 2
ACKNOWLEDGEMENTS 3
CONTENTS 4
LIST OF FIGURES 5
LIST OF TABLES 6
CHAPTER 1 INTRODUCTION 7
1.1 MOTIVATION 8
1.2 THESIS ORGANIZATION 8
CHAPTER 2 BLUETOOTH NETWORK 10
2.1 BLUETOOTH CORE STACK 11
2.2 BLUETOOTH PRIMITIVES 14
CHAPTER 3 IMPLEMENTATION OF BLUETOOTH ACCESS POINT 19
3.1 SYSTEM ARCHITECTURE 20
3.2 µCLINUX 21
3.3 SYSTEM INITIALIZATION 23
3.4 BLUEZ — AN OPEN SOURCE BLUETOOTH STACK 28
3.5 IMPLEMENTATION STATUS 33
CHAPTER 4 HIGH BANDWIDTH BLUETOOTH ACCESS POINT 35
4.1 ANALYSIS OF INTER-CHANNEL INTERFERENCE 36
4.2 HOP SELECTION OF BLUETOOTH BASEBAND 40
4.3 BLUETOOTH CLOCK SHIFTING METHOD 42
4.4 SPECIFIC BLUETOOTH ADDRESS METHOD 46
CHAPTER 5 CONCLUSION AND FUTURE WORK 52
5.1 CONCLUSION 52
5.2 FUTURE WORK 53
REFERENCE 54

[1] Axis OpenBT Stack, http://sourceforge.net/projects/openbt/
[2] Bluetooth Special Interest Group, “Specification of the Bluetooth System 1.1, Volume 1: Core”, http://www.bluetooth.com/, Feb. 2001.
[3] Bluetooth Special Interest Group, “Specification of the Bluetooth System 1.1, Volume 2: Profiles”, http://www.bluetooth.com/, Feb. 2001.
[4] BlueZ — Official Linux Bluetooth Protocol Stack, http://bluez.sourceforge.net/
[5] Boa Webserver, http://www.boa.org/
[6] Bray, J. and Sturman, C. F., “Bluetooth: Connect Without Cables”, Prentice Hall PTR, 2001.
[7] Golmie, N., Chevrollier, N., and ElBakkouri, I., “Interference Aware Bluetooth Packet Scheduling”, IEEE Global Telecommunications Conference, 2001.
[8] Golmie, N., Van Dyck, R. E., and Soltanian, A., “Interference of Bluetooth and IEEE 802.11: Simulation Modeling and Performance Evaluation,” The 4th ACM Workshop on Modeling Analysis and Simulation of Wireless and Mobile Systems, Rome, Italy, July 2001.
[9] IEEE 802.15.1 WPAN/Bluetooth, http://www.ieee802.org/15/pub/TG1.html
[10] Lim, Y., Kim, J., Sang, L. M., and Joong, S. M., “Performance Evaluation of the Bluetooth-based Public Internet Access Point”, The 15th International Conference on Information Networking, Beppu, Japan, 2001.
[11] Linux Channel Bonding, http://sourceforge.net/projects/bonding/
[12] Miller, B. A. and Bisdikian, C., “Bluetooth Revealed: The Insider’s Guide to an Open Specification for Global Wireless Communications”, Prentice Hall PTR, 2001.
[13] Muller, N. J., “Bluetooth Demystified”, McGraw-Hill, 2001.
[14] Samsung Electronics Co. Ltd., “Application Note for S3C4510B”, Feb. 2001.
[15] Samsung Electronics Co. Ltd., “User’s Manual Rev. 1.0 for S3C4510B”, Feb. 2001.
[16] Sklower, K., “The PPP Multilink Protocol (MP)”, RFC 1990, August 1996.
[17] Sollins, K., “The TFTP Protocol (TFTP) Revision 2”, RFC 1350, July 1992.
[18] Souissi, S. and Meihofer, E. F., “Performance Evaluation of a Bluetooth Network in the Presence of Adjacent and Co-channel Interference”, 2000 IEEE Emerging Technologies Symposium on Broadband, Wireless Internet Access, Texas, USA, April 2000.
[19] The uClinux Directory, http://home.at/uclinux/
[20] uClinux — Embedded Linux Microcontroller Project, http://www.uclinux.org/
[21] Wimer, W., “The Point-to-Point Protocol (PPP)”, RFC 1661, July 1994.

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