過去數年來無線感測網路(Wireless Sensor Network, WSN)已成為監控各種環境及物理現象等應用的主要技術，隨著技術的成熟甚至能夠於Zigbee網路中傳送多媒體串流資訊，但在即時性的服務上還是有相當的難度因此在有限資源的Zigbee網路中提供即時性多媒體服務為本論文主要目的。本論文設計與實作一個提供即時性的多媒體串流多通道收發器(Tranciver)結合多媒體壓縮技術「Speex」、「X264」降低傳輸資料量，透過Zigbee無線感測網路資料傳輸，並利用多點跳躍方式延長其通訊距離。
無線感測網路具有短距離以及低傳輸率的特性，本論文主要目的在於克服在這些限制下如何進行多媒體資料的傳輸以及維持多媒體資料的服務品質。本論中使用鏈狀拓樸的設計以延長傳輸距離，並於傳輸排程機制上結合多天線多通道排程機制提升整體網路吞吐量(Throughput)、降低延遲，以維持遠距離傳輸之即時(real-time)性。
最後分別於不同距離下進行多媒體傳輸和量測，並分析壓縮技術、封包遺失(Packet loss)、延遲(delay)對於多媒體服務品質(Quality of Service)產生的影響。

Over the past few years, wireless sensor network (WSN) has become the main technology to monitor environmental and physical phenomena. As the technology matures, even in the Zigbee network it is possible to send multimedia streaming data. Therefore, the main purpose of this thesis is to provide real-time services in the Zigbee network. The design and implementation of the thesis will provide real-time multimedia streaming multi-channel transceiver, which combined voice compression technology open source Speex and video compression technology, open source x264 to reduce the amount of multimedia streaming data. Open source x264 this research will make use of multi-hop to extend its communication distance over Zigbee network.
Due to the Characteristics of short transmission distance and low transmission rate for WSN. The main purpose of this thesis is to provide the transmission of multimedia data will maintaining multimedia quality of service in WSNs. This thesis deployed a chain topology design to extend the transmission distance and combine multi-radio multi-channel scheduling mechanism with transmission technology to improve the overall network throughput, latency, in order to maintain long-distance transmission of real-time. Finally, carry on multimedia transmission and measurement at different distances, and analyze the effect about Quality of Service with compression technology, Packet loss and delay.
Finally the thesis conducted a testbed with different transmission distances and scenario to analyze the quality of multimedia service using purposed multi-radio multi-channel media in WSNs

摘要 i
Abstract ii
誌謝 iii
目錄 iv
表目錄 vii
圖目錄 ix
第一章緒論 1
1.1 研究背景 1
1.2 研究動機與目的 3
1.3 論文架構 4
第二章文獻探討 5
2.1 IEEE 802.15.4與ZIGBEE介紹 5
2.2 多媒體串流資訊壓縮技術簡介 8
2.2.1Speex語音壓縮技術簡介 10
2.2.2 H.264和x264影像壓縮技術簡介 11
2.3語音品質指標與量測方法 13
2.3.1 Perceptual Evaluation of Speech Quality, PESQ 14
2.3.2E-Model與PESQ結合之語音品質量測 16
2.4多媒體傳輸於無線感測網路相關文獻探討 19
2.4.1語音於無線感測網路傳輸 19
2.4.2影像於無線感測網路 20
2.4.3多通道機制於無線感測網路 21
第三章無線多通道收發器 23
3.1多通道收發器-系統架構 23
3.2多媒體串流封包格式定義 27
3.3多媒體串流鏈狀路由機制 31
3.3.1單天線單通道傳輸機制 32
3.3.2單天線多通道傳輸機制 34
3.3.3多天線三通道傳輸機制 37
3.3.2多天線六通道傳輸機制 39
第四章系統測試與效能分析 41
4.1 系統測試平台架構 41
4.2 系統實測與分析 45
4.2.1 系統延遲測量分析 46
4.2.2 SRSC傳輸機制效能量測與分析 53
4.2.3 SRMC傳輸機制效能量測與分析 58
4.2.4 MRTC傳輸機制效能量測與分析 62
4.2.5 MRSC傳輸機制效能量測與分析 66
4.2.3最大多跳傳輸節點數量 72
第五章影像傳輸與品質分析 74
第六章結論與未來研究方向 79
6.1結論 79
6.2 未來研究方向 80
參考文獻 81

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