On-line named data network data distribution algorithm based on roadside unit

Abstract

The invention provides an on-line named data network data distribution algorithm based on a roadside unit. The on-line named data network data distribution algorithm comprises steps that a forwardinginformation table is not used, and in on-board self-organizing network highly dynamic environment, a vehicle neighbor list is not reliable, and a neighbor link can be disconnected anytime, and therefore by using the forwarding information list, a message cannot be guaranteed to reach a specific neighbor node, and by adopting a broadcasting way, interest packets can reach all of neighbor nodes; byusing a traffic lamp on a crossroad as the roadside unit, the forwarding of the interest packets and the data packets can be supported, and expenses caused by the extra deployment of the roadside unit can be saved. During the forwarding process of the interest packets, when no vehicle exists in an interest road segment, the roadside unit is used to store the copies of the interest packets, and at the same time, the shortest road segment from the current roadside unit to the roadside unit of the next interest road segment is reselected for the interest packets. Compared with a way of purelystoring the interest packets and waiting for the appearance of the vehicles in the interest road segments, the abovementioned way is capable of reducing the delay of the transmission of the interest packets.

Description

technical field [0001] The invention relates to the field of intelligent traffic systems, and more specifically, to a roadside unit-based vehicle naming data network data distribution algorithm. Background technique [0002] The intelligent transportation system integrates different technical fields such as electronics, communication, and computer, and builds a large-scale, real-time, accurate and efficient traffic management system through advanced communication technology. Vehicle ad hoc network is a kind of self-organized and open-structure vehicle-to-vehicle communication network, and it is also an important part of intelligent transportation system. In the vehicle-mounted ad hoc network, different road sections have different traffic densities. Due to the differences in vehicle speed and direction and the obstruction of buildings or trees on both sides of the road, the link status between vehicles often changes in a short period of time, and even Link down condition. ...

AI Technical Summary

Problems solved by technology

However, in the vehicular ad hoc network, the speed of the vehicle is much lower than the speed of wireless transmission, so this approach will cause a large message delay

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