In this thesis, we propose EcoIR, an infrared communication and reprogramming system for resource-constrained sensor platforms. EcoIR shows the feasibility of optical wireless communications on sensor nodes and also becomes a supplemental technology for existing RF networks. EcoIR
requires simple hardware design because it involves only a phototransistor and an infrared emitting diode. Besides, EcoIR is also a lightweight system, which consumes only 1858 bytes of code memory and 29 bytes of data memory. The small memory consumption allows EcoIR to be easily implemented on resource-constrained sensor platforms. To ease programmers’ burden, the implementation of this
framework is packed into several APIs, so the programmers can access EcoIR from their applications by taking a few function calls. As a wireless communication system, EcoIR delivers the average data transmission throughput of 50 byte/s and can achieve at least 150 byte/s with modulation scheme improvements. We also present the complementary support to existing RF-based networks by applying EcoIR to two real-running applications.

本文提出了一個微型無線感測平台上之紅外線通訊及韌體更新系統，稱之為EcoIR。EcoIR證實了在微型無線感測平台上實作光學無線傳輸的可行性，並利用光學無線傳輸有效地改善現有無線電頻譜(Radio Frequency)網路技術的不足。EcoIR除了硬體設計簡單，也只消耗相當少量的記憶體空間，因此可以非常輕易的被應用於任何微型無線感測平台上。為了減輕使用者負擔，EcoIR也提供了應用程式介面(Application Program Interface)，使用者只需要透過函式呼叫便可套用EcoIR到自己的微型無線感測平台上。EcoIR也可以達到至少150位元/秒的資料傳輸頻寬。我們也將EcoIR套用到兩個實際運作的無線電頻譜網路中：實驗結果顯示，EcoIR可以有效的彌補目前無線射頻網路的不足。

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