Design and Implementation of a Dynamic Data Binding Mechanism for Wireless Sensor Networks

• Main Authors: Chia-Wei Hsieh, 謝嘉維
• Other Authors: Chian C. Ho
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/92022809969588045543

碩士 === 雲林科技大學 === 電機工程系碩士班 === 97 === While wireless sensor network technology has evolved for years, there are as yet few applications developed in home automation or intelligent home contexts. As a wireless network facilitates the deployment of untethered devices without introducing physical wires, such strengths are well suited to devising a certain type of applications for home control and management. Even given the presence of concerned applications, a general user may hardly familiarize himself to installing, configuring, or maintaining off-the-shelf wireless sensor network devices to customized needs. This is because wireless sensor nodes operate under virtual connectivity, a form of binding relationship among wireless network entities, which is generally set upon startup on the initiative of these devices. Such self-organizing functionality benefits the user to get rid of involved device-setting details, but may often fall short of user’s expectation of more flexible operations due to poor adaptiveness. As a remedy, this thesis presents the design and implementation of a dynamic data binding mechanism for wireless sensor networks. We shall propose means for easing the user to tailor or intervene in network operations to certain needs without knowledge of low-level operational details. Our objectives include: �P.Simplifing user’s experience of manipulating sensor networks online through a convenient graphical user interface; �P.Practicing an object-oriented modular design to provide an integrated software soultion to iconize geographically-dispersed network entities of concern for remote control and for monitoring purpose; �P.Achieving better interaction among network entities, so as to collaborate in a more efficient manner; �P.Leveraging the existing wireless sensor network machinery to the greatest extent possible, making our proposed mechanisms in alignment with current protocols. �P.Serving as alternatives to the preset binding mechanism, incorporating value-added features into the wireless network to make it better manageable and more complete. �P.Demonstrating an example implementation of energy-saving wireless outlets that prevent plugged-in peripherals originally left on standby from wasting energy by total power cut. �P.Producing a pratical platform over which to inspire the development of other home control applications. In addition, we address several issues that IEEE 802.15.4-based protocols like Zigbee or JenNet have not taken into account when realizing a generic home control application. These issuses arise when multiple switches are inter-related to contol a common end device, resulting in instability or unexpected conflicts. These issues are dealt with by our novel treatment of virtual logic that settles control conflicts using serial virtual connectivities in place of parallel ones. Therefore, in our architecture the complexity of inter-switch virtual connectivities can be reduced effectively as well, reflecting an optmized datapath as a whole. Closer investigation leads us to conclude that this study, exploiting wireless sensor network techniques, lends elegantly itself to the field of home automation. Our development can get fielded promisingly in practice.