Power-Balanced Design Research for Wireless Sensor Networks with Different Transmission Ranges

• Main Authors: Shao-Yan Ma, 馬少彥
• Other Authors: Chie Dou
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/72601342439552425110

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 101 === Being under the Wireless Sensor Networks (WSNs) and based on the Time Division Multiple Access (TDMA), this thesis divides the sensor networks according to the amount of flow into three layers, which are the third layer near the exterior, the second layer, and the first layer closest to the SINK. Since the network nodes scatter broader and the transmitted data amount is less in the second and third layer, delivery between layers can be done simultaneously without interference. The sensor nodes in the first layer not only transmit their own data, but also transfer data from the third layer, thus in this article, the TDMA-based schedule is set, and through prior number assignment, the transmission path and order are set from the third layer to the second to avoid unnecessary interference, or even retransmission. The main purpose of this thesis is to devise a system that the Signal to Interference plus Noise Ratio (SINR) is the same from the exterior to the interior, using same power in the same sensor network. Since the data amount accumulates from the exterior to the interior, the modulation size and path loss generated from the process of transmission are also considered. To ensure the quality of data reception, each layer transmits with the same modulation size and achieves stable reception quality by adjusting the distance. It can be found in the presentation of SINR that, the longer the distance between each layer, the less the SINR decreases, which greatly improves the data quality that may be affected by distance. Keyword: SINR, SNR, balance power consumption, different transmission range