Vehicular ad hoc network routing method based on road side units (RSUs)

Abstract

The invention discloses a vehicular ad hoc network routing method based on road side units (RSUs), and belongs to the technical field of traffic intelligence. The vehicular ad hoc network routing method based on the RSUs includes the following steps: step one, the RSUs are placed on a crossroad in a city, all the RSUs are connected to a location server in a wired mode, the RSUs are responsible for collecting geographical location information of vehicles and sending the geographical location information to the location server for recording, and the location server manages all the location information of all the vehicles and traffic condition information of roads; step two, a vehicle A queries a routing path of a vehicle B to the location server, and the location server calculates a routing path for the vehicle A according to a weighted Dijkstra algorithm; and step three, after the vehicle A obtains the routing path, data are sent to the vehicle B through geographical forwarding along the routing path. The RSUs and the location server are utilized for collecting the geographical location information of the vehicles and providing the routing path, routing overhead and transmission delay are greatly reduced, the bandwidth usage efficiency of a vehicular ad hoc network is improved, and data grouping transmissibility is improved.

Description

technical field [0001] The invention relates to a vehicle-mounted ad hoc network routing communication method using a crossroad roadside base station (Road Side Unit RSU) to assist, in particular to a method for routing a vehicle-mounted ad hoc network based on a roadside base station, and belongs to the technical field of traffic intelligence. Background technique: [0002] At present, worldwide, the consumption of automobiles has risen sharply. The low cost of vehicles and the improvement of per capita income have led to a large number of vehicles being put into use every year. However, the number of deaths caused by traffic accidents reaches more than 1 million people every year. The cause of most traffic accidents is that drivers cannot grasp the traffic conditions in the front and rear, and cannot take measures in advance to avoid traffic accidents. Therefore, the intelligent transportation system needs to provide the driver with over-the-horizon traffic information a...

AI Technical Summary

Problems solved by technology

(3) The urban environment is complex, and many building obstacles block the communication between vehicles

Since most of the routing methods do not take into account that there are a large number of buildings in the VANET as obstacles, vehicles shuttle between the roads, and the environment of the wireless channel is very different from the traditional mobile ad hoc network, so these methods cannot solve the VANET routing very well. question

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