SmartMote: An Adaptive Update Mechanism for Wireless Ad-Hoc Sensor Network

• Main Authors: Yao-Dong Zou, 鄒耀東
• Other Authors: Sheng-Tzong Cheng
• Format: Others
• Language: en_US
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/33879008582458315193

碩士 === 國立成功大學 === 資訊工程學系碩博士班 === 97 === This thesis describes a novel update mechanism for large wireless ad-hoc sensor networks (WASNs). In wireless sensor networks, the nodes may have to be reprogrammed, especially for design-implement-test iterations. Manually reprogramming is a very cumbersome work, and may be infeasible if nodes of the network are unreachable. In addition, replacing the executed application on a node by transmitting the complete program image is inefficient for small changes in the code either. It consumes a lot of bandwidth and time. Therefore, an on-the-fly update mechanism is required. This paper exploits programmable packets to update sensor behaviors. To reduce the code transferred and power consumption, a group management architecture is developed. This architecture helps reduce power consumption and increase node number that control by Leader Node in WASNs. The proposed update mechanism, SmartMote, has been implemented on the Tmote-based Octopus II sensor node. SmartMote is a compact interpreter-like virtual machine designed specifically for wireless ad hoc sensor networks built on TinyOS, a component-based operating system for highly constraint embedded platform. Instead of installing applications as binary objects on the sensor node, every node executes a byte code interpreter. SmartMote reads the special byte code commands from memory, and transforms these operations to TinyOS operations. Performance evaluation as well as measurement is conducted in the paper to illustrate the significance of the proposed mechanism.