Date Added: Jan 2013
Wireless energy transfer is a promising technology to fundamentally address energy and lifetime problems in a Wireless Sensor Network (WSN). On the other hand, it has been well recognized that a mobile base station has significant advantages over a static one. In this paper, the authors study the interesting problem of co-locating the mobile base station on the Wireless Charging Vehicle (WCV). They develop a mathematical model for this complex problem. Instead of studying the general problem formulation (OPT-t), which is time-dependent, they show that it is sufficient to study a special sub-problem (OPT-s) which only involves space-dependent variables. Subsequently, they develop a provably near-optimal solution to OPT-s.