The paper presents a review of the principle of road travel speed data collection based on mobile phone handover location technology and the road travel speed calculation and handover road network calibration method.

In this paper,an Energy-based route handoff mo de l(ERHM)for the real-time data monitoring is pro-posed,in which a handoff m echanism i s designed for adopting the nodes with minimal energy consumption rat e to form the route.

It can find the aggregate of best communication routes between any two satellites, and can reduce link switching as much as possible, thus improves the system performance .