RESEARCH e

ng wo lin ast ta ion sio og ne e ea about links that exist in the network to perform packet forwarding. Since link information changes in a regular warder. In this case, the established link is unstable and the signal strength may be reduced, which may cause Cai et al. EURASIP Journal on Wireless Communications and Networking 2014, 2014:96 http://jwcn.eurasipjournals.com/content/2014/1/96measure called the expected transmission count (ETX)State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an, Shaanxi 710071, Chinabasis, topology-based routing suffers from routing breaks, so this kind of routing protocols is not suitable for VANETs. Geographic routing [6-15] uses neighboring location information to perform packet forwarding. In this kind of routing protocols, nodes are unnecessary to an increase of the packet dropping rate. As the packet is forwarded using this kind of links, the probability of packet transmission failure is great. So, it will spend more resources on retransmissions. As a result, the net-work throughput is declined and the end-to-end delay is prolonged. To solve this problem, De Couto et al. proposed a new * Correspondence: clli@mail.xidian.edu.cnnetwork capacity than traditional routing. In the simulation, compared with other two protocols, when the number of vehicles and the average vehicle velocity increase, LSGO’s packet dropping rate is reduced and the network throughput is improved