Connection and distance balancing VANET (Vehicular Ad Hoc Network) geographical routing protocol

Abstract

The invention discloses a connection and distance balancing VANET geographical routing protocol. According to road characteristics, for the first time, the optimal next hop is selected by calculating a CDP (Product of Connection and Distance), and a disconnected route is timely recovered in a local recovery method. The routing protocol divides the routing process into two stages including that 1) in a route establishing stage, a vehicle determines whether the position thereof belongs to an intersection or road area, wherein if a node is placed in the road area, a neighbor node with the maximal CDP value is selected as the next hop for the node; if the node is in the intersection area, a next road is first selected for the node, the CDP of a neighbor node in the road is calculated, and the optimal next hop is selected; and according to the CDP values, the optimal next hops are successively selected, and a high-efficiency route is finally established; and 2) in a route recovery stage, a local recovery strategy is employed for the nodes, and a carrying-forwarding strategy is employed when local recovery failure or routing void occurs.

Description

technical field [0001] This patent relates to a geographic routing protocol for a vehicle-mounted network that balances stability and effectiveness, and belongs to the field of routing protocol utilization for a vehicle-mounted network. Background technique [0002] The vehicle network, that is, the vehicle communication network, is a mobile network designed to sense the vehicle's speed, location and other information, exchange perceived data with vehicles within a certain communication range, and automatically connect to establish a mobile network. Through the exchange of information between networks, it is possible to: reduce the occurrence of traffic accidents; reduce traffic congestion; entertainment applications, telemedicine, etc. during driving. [0003] As a new research hotspot in the field of Internet of Things, in-vehicle network involves multi-disciplinary research fields such as vehicle manufacturing, urban planning and communication network, and has a very good...

AI Technical Summary

Problems solved by technology

[0006] (2). Poor network connection stability: the result of frequent changes in the topology structure is that the network is intermittently connected and the link stability is poor;

However, the existing geographical location routing protocols either select the neighbor node with the closest distance to the current sending node as the next hop considering the link stability alone, or choose the neighbor node with the farthest distance to the current sending node considering the link validity alone. The neighbor node is used as the next hop. These two methods can meet certain performance requirements, but the overall performance is not very ideal.

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