Xiao Nong

A Delay Sensitive Feedback Control Data Aggregation Approach in Wireless Sensor Network

In wireless sensor networks (WSN) real-time data delivery is a challenging issue, especially when bursty events happen and many emergent packets appear. The cluster-based data aggregation has emerged as a basic and general technique in sensor networks. However, there is a trade-off issue between aggregation waiting (AW) delay and aggregation accuracy. Therefore, we propose a Delay Sensitive Feedback Control (DSFC) model to solve the trade-off issue. Our goal is to decrease the AW delay on the condition of meeting the desired aggregation accuracy for emergent packets when emergent event occurs. Simulation results verify the performance of DSFC, and demonstrate their attraction.

Emerging High-Performance Computing Systems and Technology

High-performance computing (HPC) technology is the strategic height of modern computing among countries in the current information era. This paper focuses on the challenges of emerging HPC technology in the future, and discusses the developing status and trends of HPC architecture, algorithms, and applications. From the viewpoint of foundation research, we propose significant research fields (or scientific issues), as well as related policies for HPC systems and technology in China.