title: A Delay-Aware and Reliable Data Aggregation for Cyber-Physical Sensing.
abstract: Physical information sensed by various sensors in a cyber-physical system should be collected for further operation. In many applications, data aggregation should take reliability and delay into consideration. To address these problems, a novel Tiered Structure Routing-based Delay-Aware and Reliable Data Aggregation scheme named TSR-DARDA for spherical physical objects is proposed. By dividing the spherical network constructed by dispersed sensor nodes into circular tiers with specifically designed widths and cells, TSTR-DARDA tries to enable as many nodes as possible to transmit data simultaneously. In order to ensure transmission reliability, lost packets are retransmitted. Moreover, to minimize the latency while maintaining reliability for data collection, in-network aggregation and broadcast techniques are adopted to deal with the transmission between data collecting nodes in the outer layer and their parent data collecting nodes in the inner layer. Thus, the optimization problem is transformed to minimize the delay under reliability constraints by controlling the system parameters. To demonstrate the effectiveness of the proposed scheme, we have conducted extensive theoretical analysis and comparisons to evaluate the performance of TSR-DARDA. The analysis and simulations show that TSR-DARDA leads to lower delay with reliability satisfaction.
authors.affiliation: School of Information Science and Engineering, Central South University, Changsha 410083, China. jinhuan_zhang@csu.edu.cn.
authors.forename: Jinhuan
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Information Science and Engineering, Central South University, Changsha 410083, China. jlong@csu.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Long
authors.affiliation: School of Information Science and Engineering, Central South University, Changsha 410083, China. 0Hcyzhang@csu.edu.cn.
authors.forename: Chengyuan
authors.initials: C
authors.lastname: Zhang
authors.affiliation: School of Information Science and Engineering, Central South University, Changsha 410083, China. guihuzhao.csu@gmail.com.
authors.forename: Guihu
authors.initials: G
authors.lastname: Zhao
keywords: delay; physical sensing; reliability; tiered structure routing