Lifetime maximization of mobile wireless camera system

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.