01706nas a2200157   4500008004100000245007600041210006900117260002100186300001000207520112600217100002101343700002301364700002401387700002201411856011501433       2016                        eng d00aMechanisms for enhancing the performance of routing protocols in VANETs0 aMechanisms for enhancing the performance of routing protocols in  cNovember 13 - 17  a11-183 a<p class="rtejustify">Vehicular Ad Hoc Networks (VANETs) are considered as a special case of Mobile Ad Hoc Networks (MANETs) and are recently gaining a great attention from the research community. Routing in VANETs has to adapt to special characteristics such as high speed and road pattern movement as well as high linkage break probability. In an urban setting the problem becomes more difficult as the existence of buildings blocks the wireless signal and hinders communication, resulting in only few nodes with increased connectivity (mostly in the intersections) that can act as true routing nodes rather than just forwarding nodes. In this paper, we compare the performance of GPCR (Greedy Perimeter Coordinator Routing), GPSR (Greedy Perimeter Stateless Routing) as well as the modified GPSR (GPSR-M) routing protocols. GPSR-M is an enhancement for the GPSR protocol that focuses on routing a message to an intermediate vehicle moving in the line of movement of the final destination, as soon as possible. Based on the performance evaluation we propose enhancements to GPSR-M in order to improve performance.</p>
1 aBouras, Christos1 aKapoulas, Vaggelis1 aStathopoulos, Nikos1 aGkamas, Apostolos  uhttp://telematics.upatras.gr/telematics/publications/mechanisms-enhancing-performance-routing-protocols-vanets