Map-Based Location Service for VANET

The location service is an important component of position-based routing protocols, used for VANETs. A hierarchical structured location service called map based location service (MBLS) is proposed in this paper. The MBLS exploits navigation system by using geographical data file (GDF) from the digital-map database to recruit location servers and to send location updates. Simulation results show that MBLS can achieve higher location query success ratio with lower location update and query cost. Further, the accuracy level of the position information in the reply message to the actual position of the mobile node is less than 50 m.