The real world scenario has changed from the wired connection to wireless connection.Over the years software, development has responded to the increasing growth of wireless connectivity in developing network enabled software.The problem arises in the wireless domain due to random packet loss in transport layer and as well as in data link layer for the end to end connection. The basic problem has been considered in this work is to convert the real world scenario of Vehicular ad hoc network into a lab oriented problem by used the APS-system and study the result to achieve better performance in the wireless domain. The real world physical problems map into analytical problem and simulate that analytic problem with respect to real world scenario by Automated Position System (APS) for antenna mounted over the mobile node in 2 Dimension space. Here the methodology quantifies the performance and the impact of the packet loss, delay, by the bit error rate and throughput with respect to the real- world scenario of VANET in the MAC layer, data link layer and transport layer. The result presents the Directional Antenna which is mounted over the vehicle gives less bit error in comparison to Isotropic and Discone antenna.