The Study of Software Update for Wireless Sensor Network

• Main Authors: Wei Lun Lee, 李瑋倫
• Other Authors: C. C. Lin
• Format: Others
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/12479393835719630764

碩士 === 長庚大學 === 資訊工程學研究所 === 97 === The functions of the wireless sensor network (WSN) node need to be modified in different requirements in order to fulfill different applications. The power saving and performance are key issues have to be conquered. In this research, we propose a mechanism to increase the lifetime for the specific node’s update in the wireless sensor network. Firstly, we modify the interest packet of directed diffusion method to determine sink nodes. Secondly, this study combined MTPR with MMBCR to determine the update path. This combined method can not only find the shortest path for increasing the efficiency, but also provide a good power saving for extending the network life cycle. Thirdly, we divide program codes into core modules and application modules. It can reduce the data amount when WSN nodes are updating. These data is transmitted by SPIN method to secure packet lossless. In comparing our study and Deluge, the experimental results show that (1) the transmission time can be reduced to 67% when send 12 pages in 5*5 network topology. (2) The transmission packet can be reduced to 41% and power consumption can be saved to 67% when send 12 pages in 5*5 network topology. (3) The 12 pages updating task in 5*5 network topology can be executed more than 1.79 times than Deluge. (4) In reducing code image size, the transmission time can be reduced to 14% and the power consumption can be saved to 87% in 5*1 network topology.