Title :
Lifetime maximization of mobile wireless camera system
Author :
Kim, Giwon ; Kim, Jungsoo ; Kim, Tae-Rim ; Kyung, Chong-Min
Author_Institution :
Dept. EE, KAIST, Daejeon, South Korea
Abstract :
A mobile wireless camera (MWC) captures scene as it moves around, and then, stores the scene after compression. In this paper, we propose a novel method to extend battery lifetime by intermittently transmitting the compressed data to the base station (BS) through wireless transmission when the distance between MWC and BS is shorter than a given threshold distance; otherwise, compressed data are stored in the internal memory of MWC. We present an analytic method to determine the threshold distance based on the statistics of transmission distance and available memory capacity such that the lifetime of MWC is maximized while preserving all compressed data. Experimental results show that the proposed resource management method offers up to 79.72% (average 33.57%) lifetime improvement compared to the conventional method which transmits encoded data only after memory is full.
Keywords :
battery management systems; data compression; flash memories; mobile communication; random-access storage; video cameras; video coding; MWC; base station; battery lifetime; compressed data; internal memory; lifetime maximization; memory capacity; mobile wireless camera system; resource management method; threshold distance; transmission distance; wireless transmission; Batteries; Encoding; Memory management; Power demand; Resource management; Wireless communication; Wireless sensor networks; lifetime maximization; mobile wireless camera; resoruce management;
Conference_Titel :
SoC Design Conference (ISOCC), 2010 International
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-8633-5
DOI :
10.1109/SOCDC.2010.5682928