Minimizing Energy Consumption Through Mobility in Wireless Video Sensor Networks

Energy is an important issue in designing wireless sensor networks. Coverage and connectivity are not of less important since they are necessary for the network to be operational. In this work, we consider the case of wireless video sensor networks where some sensors have visual capabilities. We study the benefit of having some mobile nodes able to move in the network field so coverage and connectivity constraints are satisfied while saving energy. We formulated this problem using integer linear programming. We performed several experiments using the CPLEX solver, to get some insight into the contribution of mobility in the context of video streaming. We mainly show that, even if mobility cost is much higher than communication, the latter tends to be predominant in the overall consumed energy as the video session duration increases. Thus, justifying the mobility cost. Keywords-Video; mobility; optimization; energy saving; topology control;