The invention relates to a traffic flow density-based solution to the problem of VANET sparse connectivity, belongs to the technical field of communication, and is used for network communication of urban vehicles. The solution is characterized in that a greedy forwarding strategy is selected according to the traffic flow density around a vehicle, thereby ensuring efficiency of a whole network. A neighbor list is maintained between vehicles through a Hello data packet, when the traffic flow density around the vehicle is relatively large, a node in the neighbor list with the smallest Euclidean distance to a destination node is selected as the next-hop node to perform data forwarding, when the traffic flow density around the vehicle is relatively small, the vehicle is located in a sparse connected region, and at this time a node in the neighbor list which moves fastest towards the target node is selected as the next-hop node to perform data transmission, thereby ensuring the efficiency of the whole network. A simulation experiment shows that by adoption of the method, under a circumstance that the traffic flow density is relatively small, compared with a conventional method, the GPSR protocol packet loss rate is lower, and the transmission rate is higher.
Traffic flow density-based solution to problem of VANET sparse connectivity
2015-08-12
Patent
Electronic Resource
English
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