Robust and efficient data delivery in vehicular ad hoc networks (VANETs) with high mobility is a challenging issue\ndue to dynamic topology changes and unstable wireless links. The opportunistic routing protocols can improve\nthe reliability of routing by making full use of the broadcast characteristics and assist in data transmission through\nadditional backup links. In this paper, we propose a Link State aware Geographic Opportunistic routing protocol\n(LSGO) which exploits a combination of geographic location and the link state information as the routing metric.\nThe LSGO aims to improve the reliability of data transmission in a highly dynamic environment, which selects the\nforwarders and prioritizes them based on the vehicle�s geographic location and the link�s quality. We compare the\nperformance of LSGO with GpsrJ + which removes the unnecessary stop at a junction and greedy traffic aware\nrouting protocol (GyTAR) using network simulator ns-2. The simulation results show that it opens more nodes to\nparticipate in the opportunistic data forwarding and increases a connection�s throughput while using no more\nnetwork capacity than traditional routing. In the simulation, compared with other two protocols, when the number\nof vehicles and the average vehicle velocity increase, LSGO�s packet dropping rate is reduced and the network\nthroughput is improved.
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