在無線感測網路中適應性之資料中心的儲存方法

無線感測網路裡，經過一段時間就會產生大量的數據資料，目前以資料為中心的資料儲存方法利用一些對映的方式，將資料儲存到特定節點，由於網路中資料分佈不平均，使得某些感測節點儲存大量的資料，並且使得這些感測節點成為熱點，造成這些感測節點快速的將其能源耗盡。我們提出一個障眼法應用在兩種網路架構上，用來解決感測節點儲存空間不足的問題，另外，我們提出了一個多層次的門檻值的方法，使得節點的資源能夠公平的被使用，我們的方法能夠將資料分散到不同的感測節點儲存，並且使得感測節點的資源運用能夠達到負載平衡；實驗的部份顯示出我們的方法能夠提高資料品質以及避免儲存熱點的發生。

關鍵字

無線感測網路；熱點；資料儲存

並列摘要

Over a period of time, a sensor network can generate large amounts of data. Several data-centric storage (DCS) techniques exploit some different methods of mapping events to storage nodes. However, most of them fail to deal with storage memory space due to high percentage of the load is assigned to a relatively small portion of the sensor nodes. Hence, the resources of these storage nodes may deplete quickly. In this paper, we propose a cover-up scheme based on two kinds of network architectures to solve the memory space full problem. The cover-up scheme can adjust the number of storage nodes dynamically. In order to achieve load balancing among sensor nodes in the sensor network fairly, we propose another scheme, called multi-threshold levels. Our schemes can spread storage into different sensor nodes and achieve load balancing among sensor nodes in a wide sensor network. Simulations have shown that the scheme can enhance the quality of data and avoid hotspot of the storage while there are a vast number of the events in a sensor network.

並列關鍵字

sensor networks ； hotspot ； data storage

參考文獻

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[14] A. Nasipuri and K. Li, “A Directionality Based Location Discovery Scheme for Wireless Sensor Networks,” Proceedings of the First ACM international Workshop on Wireless Sensor Networks and Applications, Sep.r 2002.

國際替代計量

在無線感測網路中適應性之資料中心的儲存方法

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