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研究生:靳龍庭
研究生(外文):Long-ting Jin
論文名稱:利用跨階層於無線感測網路之效能分析
論文名稱(外文):Performance Analysis of Cross Layer Design in Wireless Sensor Networks
指導教授:溫志宏溫志宏引用關係
指導教授(外文):Jyh-horng Wen
學位類別:碩士
校院名稱:國立中正大學
系所名稱:電機工程所
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:2006
畢業學年度:94
語文別:英文
論文頁數:59
中文關鍵詞:跨階層無線感測網路
外文關鍵詞:Cross layerwireless sensor networks
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無線感測網路其重要的設計考量為減少能量消耗來延長系統使用時間。現今大部份有關無線感測網路的研究工作都只集中在單一階層方面,並未考量到不同階層間相互的影響,在本論文中,我們主要研究為無線感測網路實體層與資料鏈結層對上鏈傳輸的影響。在實體層中,我們提出一個適應性調變技術暨傳輸能量控制機制用以減少傳輸能量使無線感測網路能有效節省電力消耗。經由模擬結果可得知我們所提出的機制能在系統所規定的位元錯誤率下節省較多的傳輸能量。在資料鏈結層我們考慮一個有限長度的佇列並採取Q. Liu 等人所提出的佇列系統來分析實體層與資料鏈結層的關係,並建構出有限狀態馬可夫鍊,算出資料鏈結層中的封包丟棄率。最後,我們利用封包遺失率和平均資料輸出量來分析系統效能,從模擬結果得知,實際上不同的調變模式和傳輸能量控制機制會影響佇列中被丟棄掉的封包數目。我們所提出的適應性調變技術暨傳輸能量控制機制在同時考慮到佇列的情況下,對於整體系統雖然不能獲得較高的平均資料輸出量,但在系統所規定的位元錯誤率下仍然可以減少傳輸能量的消耗。
For wireless sensor networks, the important design consideration is to extend the lifetime by reducing the power consumption. Most of recent research works only focus on the individual layer issues and do not care the interaction between different layers in wireless sensor networks. In this thesis, we use a cross layer approach to study the impact of physical layer and data link layer for uplink transmission in wireless sensor networks. At the physical layer, we propose an adaptive modulation with power control scheme to achieve energy efficiency. Simulation results show that our proposed scheme is able to save much transmission power and maintain a target bit error rate.
In addition, we consider a finite length queue at the data link layer and adopt the queuing system proposed by Q. Liu et al to analyze the relationship between two layers. Then, we construct a finite state Markov chain (FSMC) channel to obtain packet dropping probability at the data link layer. Finally, we can get the packet loss rate and average throughput to analyze the performance of system. Simulation results show that the different modulation modes and power control schemes can actually influence the number of dropped packets in the queue. Even if our proposed scheme with queuing can not increase the average throughput, but it can still reduce the power consumption for overall system.
Abstract in Chinese
Abstract in English
Contents
List of Figures
List of Tables
Chapter 1 Introduction
1.1 Background overview and motivation
1.2 Organization
Chapter 2 Overview of wireless sensor networks
2.1 Introduction to wireless sensor networks
2.2 Sensor networks communication and hardware architecture
2.3 Examples of application in sensor networks
2.4 Sensor networks challenges
2.5 Requirements
2.6 Protocol stack of the sensor networks
2.7 Cross layer design for sensor networks
Chapter 3 Physical layer analysis of adaptive modulation with power control in
wireless sensor networks
3.1 System description
3.2 Adaptive modulation without power control scheme (AM without PC)
3.3 Adaptive modulation with power control scheme 1 (AM with PC 1)
3.4 Adaptive modulation with power control scheme 2 (AM with PC 2)
3.5 Simulation results
Chapter 4 Queuing analysis and adaptive modulation with power control in
wireless sensor networks
4.1 System model with queue
4.2 FSMC channel model
4.3 The queuing model with adaptive modulation scheme
4.3.1 Arrival process
4.3.2 Queue service process
4.3.3 Queue state
4.3.4 Stationary distribution
4.4 Performance analysis
4.5 Simulation results
Chapter 5 Conclusions
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