Internet of Vehicles cross-layer routing method based on interference awareness

Abstract

The invention relates to an Internet of Vehicles cross-layer routing method based on interference awareness. The Internet of Vehicles cross-layer routing method based on interference awareness includes the steps: a source node sends routing request broadcast through an on-demand routing mechanism to obtain all the possible paths from the source node to a target node; after the target node receives the routing request broadcast, from the target node, a route response data packet is sent to the last hop of node along each possible path, wherein the route response data packet carries SIR (Signal To Interference) fields; the source node determines whether the final route response data packet is received, and if so, the path having the maximum SIR field in the received route response data packet as the optimum path; and each node of the optimum path periodically updates the local maximum SIR value and exchanges the available service channel. Compared with the prior art, the Internet of Vehicles cross-layer routing method based on interference awareness evaluate the channel quality through SIR calculation, fully considers the interference level caused by the neighbor nodes, can guarantee the reliability of an active channel through periodical detection, and can effectively improve the data packet transmission success rate.

Description

technical field [0001] The invention relates to intelligent transportation technology in the Internet of Vehicles, in particular to a cross-layer routing method for the Internet of Vehicles based on interference perception. Background technique [0002] With the rapid development of modern automobile industry technology and wireless communication technology, the communication mode of the Internet of Vehicles is gradually becoming a reality. Information exchange between vehicles and the outside world (Vehicle to X, V2X), including Vehicle to Vehicle (V2V), vehicle The frequent short-range communication between Vehicle to Infrastructure (V2I) and Vehicle to Person (V2P), together with the long-distance communication between vehicles and the network, together constitute the overall framework of the Internet of Vehicles. The purpose of vehicle-to-vehicle communication is to improve road traffic safety and improve driving efficiency. The Internet of Vehicles has very strict requ...

AI Technical Summary

Problems solved by technology

[0005] In the traditional mobile communication system, the layered network structure is widely used, but in the face of unstable wireless network and limited wireless resources, the layered structure protocol is not flexible, and has poor adaptability to the overall network.

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