Implementation of position-based routing module on NS3

Simulation is an essential tool to research in this area and NS-3 is seen as a very promising tool, due to the possibility of simulating complex scenarios. It was recently released to replace the popular NS-2, but it still supports a limited set of technologies. With the recent advances in vehicular networks, position-based routing is seen as an adequate strategy to mitigate the problems brought by the high mobility of the nodes. Greedy Perimeter Stateless Routing is one of the most representative protocols of this approach, as the others share the same basic principles but with improvements to parts of its strategies. In this paper we describe and assess our NS-3 implementation of GPSR and the concept of location service, which is required for position-based routing to work. Our aim is to submit our code to review so that it may be included in the next NS-3 release.