ZigBee-based road traffic early-warning system and method

Abstract

The invention relates to ZigBee networking, and particularly relates to a ZigBee-based road traffic early-warning system and method. A communication network is built between terminals at random, and all nodes entering the network can transmit information to each other through a multi-hop mechanism for achieving early warning transmission at first time. A highway is divided into a plurality of road segments, wherein each road segment comprises at least one routing service node unit and a plurality of vehicle-mounted ZigBee node units. Therefore, the ZigBee-based road traffic early-warning system and method have the advantages that (1) the early-warning distance is long, the transmission speed is high, information can be transferred a few kilometers away through multiple hops between vehicles and a driver is provided with full reaction distance and time; (2) the early-warning information transmission path is not disturbed by bad weather, a 2.4G frequency band is adopted by a ZigBee, so that the anti-jamming capability and the confidentiality are high; (3) the accident reaction speed of a traffic control department is improved; (4) the networking capacity of the ZigBee is high, and a lot of vehicle terminal entering road segments can be permitted; and (5) the function expansibility of the ZigBee is high and more functions can be extended on the basis of the ZigBee.

Description

technical field [0001] The invention relates to ZigBee networking, which is a communication network randomly established between terminals, and any node entering the network can transmit information to each other through a multi-hop mechanism to achieve the first-time propagation early warning; specifically relates to ZigBee-based road traffic early warning and its method . Background technique [0002] Zigbee is a low-power personal area network protocol based on the IEEE802.15.4 standard. The technology specified under this agreement is a short-distance, low-power wireless communication technology. This name comes from the eight-character dance of bees, because bees (bees) use the "dance" of flying and "buzzing" (zig) to shake their wings to communicate with their companions the location information of pollen, that is to say, bees rely on this way Form a communication network in the group. It is characterized by close range, low complexity, self-organization, low power ...

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly solves the technical problem of traffic accident early warning on highways in bad weather conditions such as low visibility or slippery road surface in the prior art to prevent secondary accidents or serial rear-end collisions and major traffic accidents; it provides a ZigBee-based road traffic early warning and method with low power consumption, low data volume and low cost, free frequency band 2.4G, high anti-interference, high confidentiality and automatic dynamic networking

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