Title :
Group-based discovery in low-duty-cycle mobile sensor networks
Author :
Chen, Liangyin ; Gu, Yu ; Guo, Shuo ; He, Tian ; Shu, Yuanchao ; Zhang, Fan ; Chen, Jiming
Author_Institution :
Coll. of Comput. Sci., Sichuan Univ., Chengdu, China
Abstract :
Wireless Sensor Networks have been used in many mobile applications such as wildlife tracking and participatory urban sensing. Because of the combination of high mobility and low-duty-cycle operations, it is a challenging issue to reduce discovery delay among mobile nodes, so that mobile nodes can establish connection quickly once they are within each other´s vicinity. Existing discovery designs are essentially pair-wise based, in which discovery is passively achieved when two nodes are pre-scheduled to wake-up at the same time. In contrast, for the first time, this work reduces discovery delay significantly by proactively referring wake-up schedules among a group of nodes. Because proactive references incur additional overhead, we introduce a novel selective reference mechanism based on spatiotemporal properties of neighborhood and the mobility of the nodes. Our quantitative analysis indicates that the discovery delay of our group-based mechanism is significantly smaller than that of the pair-wise one. Our testbed experiments using 40 sensor nodes confirm our theoretical analysis, showing one order of magnitude reduction in discovery delay compared with traditional pair-wise methods with only 0.5%~8.8% increase in energy consumption.
Keywords :
mobile radio; scheduling; target tracking; wireless sensor networks; additional overhead; discovery delay; group-based discovery; low-duty-cycle mobile sensor networks; mobile nodes; participatory urban sensing; proactive references; selective reference mechanism; spatiotemporal properties; wake-up schedules; wildlife tracking; wireless sensor networks; Delay; Mobile computing; Protocols; Schedules;
Conference_Titel :
Sensor, Mesh and Ad Hoc Communications and Networks (SECON), 2012 9th Annual IEEE Communications Society Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-1904-1
Electronic_ISBN :
2155-5486
DOI :
10.1109/SECON.2012.6275824