Adjustable Grid-Based Data Replication for Wireless Sensor Networks

• Main Authors: Jia-shiun wu, 吳佳勳
• Other Authors: Chu-Yu Chen
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/98908276611539689716

碩士 === 國立臺南大學 === 通訊工程研究所碩士班 === 98 === In sensor network, the energy of the popular nodes may consume quickly when a greater number of sensor nodes are interested in the same popular events and query them frequently. This situation in query is based on wireless sensor networks that are characterized by many to one query problem related to energy unbalance. In order to eliminate the phenomenon of overload nodes and reduce the cost of communication and transmission, we will try to use adjustable data replication. When the data node be requested by more query issuer nodes and frequency is more than the threshold, the data node will have a replica node from the data node to other nodes closer query issuer nodes in order to reduce the flow. In this thesis, we propose replication scheme which named adjustable data replication (ADR) is based on virtual grid to improve the life time of data node. First, in each grid, a head node is selected to be a manager, receive or transmission of packets for other nodes in the same virtual grid. Second, the manager nodes around data node or replica nodes will compute request packet flow to determine whether to build a replica node. Finally, ADR builds data replication closer to have a lot of interest nodes step by step.