Improvement of GPSR protocol by using future position estimation of participating nodes in vehicular ad-hoc Networks
Zineb Squalli Houssaini, Imane Zaimi, Mohammed Oumsis, Saïd Ouatik El Alaoui · 2016
In vehicular ad-hoc network (VANET), routing was and will remain an active field for research as long as the researchers can improve it. In fact, VANET encounters many confrontations due to the high speed and mobility pattern. Thus, the most dialectical and debatable issue is how to ensure the routing in a brief delay and with a minimum lost packets. To this end, various geographical routing protocols have been proposed to confront many challenges. One of these protocols is the greedy perimeter stateless routing (GPSR) that represents the most promising position-based routing protocol in wireless networks. The nodes use the current location information of the neighbours within their transmission boundary range and the location of the destination. These information are important to choose the adequate next hop for forwarding data. However, there are some cases when this strategy of GPSR is not suitable. The paper presents an enhancement of this famous protocol identified as GPRS+PRedict. This improvement is defined by estimating the future position of all participating nodes. Our experimental results show the ability of the GPSR+PRedict protocol to overcome the observed problem and to improve the overall performance of the traditional GPSR. The simulation is carried out on highway scenario by using NS-2 and VanetMobiSim simulators.