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Optimization of Energy Consumption in Image Transmission in Wireless Sensor Networks (WSNs) using a Hybrid Method | ||
| Control and Optimization in Applied Mathematics | ||
| مقاله 3، دوره 2، شماره 1، تیر 2017، صفحه 29-41 اصل مقاله (919.65 K) | ||
| نوع مقاله: Technical Note | ||
| نویسندگان | ||
| Abbas Ali Rezaee* 1؛ Farnoosh Zareian2 | ||
| 1Assistant Professor, Department of Computer Engineering and Information Technology, Payame Noor University,Tehran, IRAN | ||
| 2Department of Computer Engineering and Information Technology, Payame Noor University, International Center of Assaluyeh, Assaluyeh, Iran | ||
| چکیده | ||
| In wireless sensor networks (WSNs), sensor nodes have limited resources with regard to computation, storage, communication bandwidth, and the most important of all, energy supply. In addition, in many applications of sensor networks, we need to send images to a sink node. Therefore, we have to use methods for sending images in which the number and volume of packets are optimized to save energy. Data compression is one of the optimization methods in energy consumption. In this paper, an effective compression algorithm is proposed to reduces computational and energy consumption and eventually, increases the overall network lifetime. Here in, we use a combination of three DCT, DWT and SWT wavelet transforms to achieve our goals. Simulation results show that the proposed algorithm achieves its goals with regard to data compression and reduction of energy consumption, and improves the network lifetime. | ||
| کلیدواژه‌ها | ||
| Wireless sensor networks؛ Energy consumption؛ Image compression؛ Discrete wavelet transform؛ Discrete cosine transforms؛ Static wavelet transforms | ||
| عنوان مقاله [English] | ||
| بهینه سازی مصرف انرژی در انتقال تصویر در شبکه های حسگر بی سیم با استفاده از روش ترکیبی | ||
| نویسندگان [English] | ||
| عباسعلی رضایی1؛ فرنوش زارعیان2 | ||
| 1استادیار گروه مهندسی کامپیوتر و فناوری اطلاعات، دانشگاه پیام‌نور، تهران | ||
| 2دانشجوی کارشناسی ارشد، گروه مهندسی کامپیوتر و فناوری اطلاعات، عسلویه، دانشگاه پیام‌نور مرکز بین الملل عسلویه | ||
| چکیده [English] | ||
| منابع گره های حسگر به کار رفته در شبکه های حسگر بی سیم محدود بوده و به همین دلیل توان محاسباتی، حافظه، پهنای باند و مخصوصاً باتری آنها محدود است. از طرفی در بسیاری از کاربردهای شبکه حسگر ما نیاز به انتقال تصویر به گره چاهک داریم. بنابراین ما برای کاهش مصرف انرژی باید از روش هایی برای ارسال تصویر استفاده کنیم که در آنها تعداد و حجم بسته ها کم باشد. یکی از روشهای بهینه سازی مصرف انرژی فشرده سازی اطلاعات است. در این مقاله یک الگوریتم فشرده سازی کارا پیشنهاد شده است که حجم محاسباتی کمتری داشته و مصرف انرژی آن پایین است و همین باعث افزایش طول عمر شبکه می شود. در اینجا ما از ترکیب سه تبدیل DCT ، DWT و تبدیلات موجک SWT برای دست یابی به اهداف خود استفاده می کنیم. نتایج شبیه سازی نشان می دهد که الگوریتم پیشنهاد در فشرده سازی داده ها و کاهش مصرف انرژی و بهبود طول عمر شبکه به اهداف خود می رسد. | ||
| کلیدواژه‌ها [English] | ||
| شبکه های حسگر بی سیم, مصرف انرژی, فشرده سازی تصویر, تبدیل موجک گسسته, تبدیلات کسینوسی گسسته, تبدیل موجک ایستا | ||
| مراجع | ||
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