在無線的感應網路裡，主要目的是為了從一群感應裝置裡收集所要的資訊，並將這些資訊傳遞回主要網路做進一步處理。為了能延伸資料擴及的範圍，多跳(multi-hop)傳輸必須被採用；在有限的電力資源限制下，電力節約是整個網路能持續長時間的關鍵。當一個裝置在不活動的工作狀態下，為了能減少電力消耗，採用了低耗電模式，這時需要一個有效率的喚醒方法來將裝置從沈睡中復甦。另一方面，藍芽是希冀中短距離、低耗電及低成本的無線傳輸標準，可是目前並沒有適合的方法來建構藍芽的多跳網路。所以在本篇文章中，我們探討一個使用藍芽技術做資料收集的感應網路，一個快速及且有效率的藍芽分散網絡(scatternet)建立方法用來建構整個感應網路，一個能源感知路徑選擇方法用來平衡各裝置電源的消耗速率，及一個叫做預競爭 (Per-contention) 的存取方法改進也被提出用來延長裝置的使用時間。 In wireless sensor networks, the goal is to gather intended data from a number of sensor nodes and propagate this information back to the infrastructure for further processing. Multi-hop transmission is required to extend the reachable data range. Under the constraint of limited energy resources, power conservation is a key to success for multi-hop wireless sensor networks to sustain a longer time. To maximize the lifetime of ad hoc sensor networks, the power consumption rate of individual nodes must be balanced. To reduce the power consumption when a node is not active, low power mode is applied; an energy efficient access scheme is required to revive the sleeping node. Bluetooth is a promising standard for low power, short-range and low-cost wireless communications. However, currently there is no suitable scheme for multi-hop Bluetooth ad hoc network establishment. Therefore, this thesis considers a data collecting sensor network using Bluetooth technology. A fast and energy efficient Bluetooth scatternet formation algorithm is designed to construct the network, a energy aware routing scheme is proposed to balance the power consumption rate of each node, and an improvement of Bluetooth access procedure called Pre-contention access is also proposed to lengthen the node lifetime.
