In this paper, we propose two database updating models for homogeneous and auto configurable sensor network deployed in a truck without base station. In the first model, a Virtual Base Station (VBS) is periodically elected to act as classical base station for a given period of time. VBS election algorithm is based on the remaining energy level of each node at the time of selection of the VBS. The second idea deals with Energy aware Wait and See (WaS) protocol which manages update requests to avoid collisions. Like VBS, this protocol is also based on energy. Simulation results show that VBS and WaS models introduce very low overhead with respect to the classical network with permanent base station