Content forwarding node selection method in vehicular ad hoc network based on service type

Abstract

The invention discloses a method for selecting a content forwarding node in a vehicle-mounted ad hoc network based on a service type, comprising the following steps: according to the type of content information requested and the bandwidth occupancy of neighboring vehicles that can be forwarded within a one-hop transmission range, calculate Bandwidth occupancy scale factor; according to the distance between the neighbor vehicle and the initial request vehicle and the speed of the neighbor vehicle, define the virtual arrival time from the candidate forwarding vehicle to the initial request vehicle; calculate the forwarding node impact factor according to the bandwidth occupation scale factor and the virtual arrival time ; Select the forwarding node according to the forwarding node influence factor. The present invention selects the forwarding node according to the bandwidth occupation situation and the moving speed of the node position, which can effectively avoid the network time delay caused by the network topology change, improve the success rate of content information forwarding, thereby effectively improving the success rate of content data packet arrival, Reduce transmission delay and improve network performance.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for selecting a content forwarding node in a vehicle-mounted ad hoc network based on a service type. Background technique [0002] As a research direction of mobile ad hoc network (MANET), vehicular ad hoc network (VANET) has important applications in intelligent transportation system (ITS). VANET regards vehicle nodes and road infrastructure as network nodes, and mainly realizes communication between vehicles (V2V, Vehicle-to-Vehicle Communication) and communication between vehicles and roadside facilities (V2I, Vehicle-to-Infrastructure Communication). The real-time communication mobile network improves traffic safety and management efficiency, and also provides more services for vehicle driving. Due to the high mobility of vehicles, VANET has the characteristics of frequent network topology changes. In VANET scenarios, general MANET protocols are pr...

AI Technical Summary

Problems solved by technology

However, due to the high-speed mobility of the vehicles, the vehicles participating in the cooperation in the request information arrival path may have left the communication range of each other during the process of returning the content, and the communication link cannot be established, and the content may not be able to arrive smoothly by returning the original route. The initial content request vehicle; there may also be a better forwarding path than returning to the original requesting vehicle according to the original path of the request information

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