A Transmission Scheduling Protocol With Bounded Delay In Industrial Wireless Sensor Networks

• Main Authors: Chang, Hsinfang, 張心芳
• Other Authors: Hou, Tingchao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/58079984421134131314

碩士 === 國立中正大學 === 通訊工程研究所 === 100 === Wireless Sensor Network (WSN) has gained much attention in recent years. After being deployed in the target region, sensor nodes sense information in the region and transmit it to the base station by wireless communication and network routing technology. Due to the small size of the sensor node, the hardware resources are limited; and further, it affects the capability of computing, storage space and power supply of nodes. However, the use of WSN in industrial automation is different from that in traditional WSN. WSN in industrial automation has low tolerance on end-to-end delay. Therefore, the design of data transmission needs to provide real-time QoS. In a real-time application, the predictable bounded delay is expected. In this thesis, we propose a chain-based transmission scheduling protocol. Through the setup of multiple chains, the order of node to send data packets follows the sequential positional order of the node in the chain and furthermore these chains can provide predictable bounded delay because the number of nodes in each chain is fixed. To improve the throughput, we let each chain operate in parallel. The simulations show that the bounded delays for each node are not the same due to the dependency on their position in the sink tree and the node number of the sub-chain. The bounded delay will increase as the node degree increases.