International Journal of Advance Research in Science and Engineering (IJARSE)
Wireless communication systems such as cellular networks, Wireless Local Area Networks (WLANs) and wireless broadband networks. Vehicular Heterogeneous Networks (VHNs) can be comprised of different wireless accessing technologies which may solely dedicated to vehicular communications or else are part of a wider public network, is a priority in the near future. The possibility to switch from one access technology to another based on performance, availability or economic reasons, while maintaining active connections, is called intertechnology or Vertical Hand Off (VHO). Besides supporting extensive mobility of nodes, VHO would enable novel types of applications to be developed, especially in a vehicular network.