A Routing Method for Vehicular Delay-Tolerant Networks Based on Node Forwarding Capability Estimation

Abstract

The invention discloses a vehicle-mounted delay tolerant network routing method based on node forwarding capability estimation. The vehicle-mounted delay tolerant network routing method comprises: a step 1: judging whether a destination node exists within the communication range of a source node, and if so, directly sending information to the destination node; otherwise, executing a step 2; step 2: estimating effective connection times Ta of the source node with all neighbor nodes within the communication range thereof; a step 3: selecting neighbor nodes with Ta values exceeding a threshold as candidate relay nodes; a step 4: creating a candidate relay node throughput function, and calculating average forwarding capability values of the candidate relay nodes; a step 5: using the candidate relay node having the maximum average forwarding capability value as a next hop relay node; a step 6: selecting the relay node through the source node, sending the information to the relay node, and using the relay node as a new source node; and a step 7: circularly executing the step 1 to the step 6 until streaming media information is successfully transmitted to the destination node. The vehicle-mounted delay tolerant network routing method disclosed by the invention is high in data packet delivery ratio, low in transmission delay and low in delay jitter.

Description

technical field [0001] The invention belongs to the application field of vehicle-mounted delay-tolerant networks, in particular to a vehicle-mounted delay-tolerant network routing method based on node forwarding capability estimation. Background technique [0002] As the first project in the Internet of Things industry, the Internet of Vehicles has attracted increasing attention from academia and industry. Currently, the main application services of the Internet of Vehicles include vehicle active safety services and user entertainment experience services. Vehicle active safety service means that after an accident occurs on the road ahead, the vehicle in front collects the accident situation through the audio and video collection device, and then forwards the data to the rear vehicle node through the communication module of the Internet of Vehicles to actively remind the car to drive There is an abnormal situation ahead of the driver, thereby avoiding a larger traffic accide...

AI Technical Summary

Problems solved by technology

[0004] Technical issues: At present, most of the routing and data forwarding methods of the Internet of Vehicles are still based on the VANETs environment with high connectivity coverage, and the existing methods are applied to VDTNs networks with intermittent and opportunistic node connections, which will reduce the efficiency of data forwarding; data Increased transmission delay, delay jitter and packet loss rate; weaker data transmission stability

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