We propose an enhancement for the well-known greedy perimeter stateless routing (GPSR) protocol for vehicular ad hoc networks (VANETs), which exploits information about link reliability when one-hop vehicles are chosen for forwarding a data packet. In the proposed modified routing scheme, a tagged vehicle will select its one-hop forwarding vehicle based on reliability of the corresponding communication link. We define link reliability as the probability that a direct link among a pair of neighbour vehicles will remain alive for a finite time interval. We present a model for computing link reliability and use this model for the design of reliability based GPSR. The proposed protocol ensures that links with reliability factor greater than a given threshold alone are selected, when constructing a route from source to destination. The modified routing scheme shows significant improvement over the conventional GPSR protocol in terms of packet delivery ratio and throughput. We provide simulation results to justify the claim.
This paper concludes that the LTE is more proper for many applications and use REF to modify the greedy perimeter stateless routing protocol (GPSR) by exploiting information about the link reliability to select one-hop forwarding vehicles.
Link Reliability Based Greedy Perimeter Stateless Routing for Vehicular Ad Hoc Networks
International Journal of Vehicular Technology
Computer Science