title: Analysis of Aggregation Delay for Multisource Sensor Data with On-Off Traffic Pattern in Wireless Body Area Networks.
abstract: Data aggregation plays an important role to improve the transmission efficiency in wireless body area networks (WBANs); however, it inherently induces additional aggregation delay. Therefore, the effect of packet aggregation on WBAN applications, which are vulnerable to delay, must be analyzed rigorously. In this paper, we analyze the packet aggregation delay for multisource sensor data with an on-off traffic pattern in WBANs. Considering two operational parameters of the aggregation threshold and aggregation timer, we calculate the probability that a packet aggregation occurs during a unit time and then derive the average aggregation delay in closed-form. The analysis results show that the aggregation delay increases as the aggregation timer or aggregation threshold increases, but is bounded below a certain level according to the number of active sensors and their on-off traffic attribute. This implies that the data aggregation technique can maximize the transmission efficiency while satisfying a given delay requirement in the WBAN system.
authors.affiliation: School of the Electrical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea. kimhr0703@cau.ac.kr.
authors.forename: Un-Ha
authors.initials: UH
authors.lastname: Kim
authors.affiliation: School of the Electrical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea. etkong@cau.ac.kr.
authors.forename: Eutteum
authors.initials: E
authors.lastname: Kong
authors.affiliation: Department of Electrical, Electronic and Control Engineering, Hankyong National University, 327 Chungang-ro, Anseong 17579, Korea. hhchoi@hknu.ac.kr.
authors.forename: Hyun-Ho
authors.initials: HH
authors.lastname: Choi
authors.affiliation: School of the Electrical Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea. jrlee@cau.ac.kr.
authors.forename: Jung-Ryun
authors.initials: JR
authors.lastname: Lee
keywords: aggregation delay; body area networks; data aggregation; delay analysis