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Internet of vehicles multi-hop broadcasting method based on message type and network connection state

A network connectivity, message-type technology, applied in specific environment-based services, broadcast service distribution, vehicle components, etc., can solve problems such as insufficient support for rapid early warning, no pre-alertness of danger, etc., to ensure transmission reliability, improve The effect of broadcasting success rate and improving transmission efficiency

Pending Publication Date: 2022-08-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many accidents are caused by secondary injuries caused by drivers not being alert to the dangers around them and unable to take action in advance
However, the current traffic communication system is not enough to support the rapid early warning of the existing complex traffic environment, which makes the mutual communication and mutual early warning between vehicles very necessary.

Method used

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  • Internet of vehicles multi-hop broadcasting method based on message type and network connection state
  • Internet of vehicles multi-hop broadcasting method based on message type and network connection state
  • Internet of vehicles multi-hop broadcasting method based on message type and network connection state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] like figure 1 It shows that this embodiment disclosed a multi -jump broad broadcast method based on the type of emergency message type and network connection state, including the following steps:

[0091] S1, source vehicle x detected a collision accident ahead (such as Figure 4 ), By querying the emergency message type example table (as shown in Table 1), the source vehicle X determined that the emergency message was a sensitive message.

[0092] Table 1. Emergency message type example

[0093] Example Destructive Whether it is avoided Message type High -speed car accident high Do not Delay sensitivity Urban road collapse high Can Delay is not sensitive Traffic control Low Do not Delay is not sensitive Urban road traffic jam Low Can Delay is not sensitive

[0094] S2, the current relay vehicle X by querying its neighbor information table (as shown in Table 2), detecting the founding neighbor vehicle E and F of the neighbor's fart...

Embodiment 2

[0116] This article sets a traffic flow with different flow velocity to simulate the severity of the network interrupt connection with the network. The smaller the number of vehicles passed by the road during the unit time, the more severe the breakdown. Similar road models such as Figure 7 Show. Figure 8 As well as Figure 9 For the 3P3B-DNT, Tonguz and others proposed by ANSCNS and Sun and other people in this example, the DV-CAST, KAD and others proposed by people proposed by people proposed by PBSAD in different vehicle flows Compared. The ANSCNS-I and ANSCNS-S in the figure respectively represent the performance of the transmission delay sensitive message and the performance of the non-lack sensitive message.

[0117] Figure 8 In China, as the traffic flow becomes larger, the possibility of network connectivity is in a discontinued state. The current relay vehicle will successfully relay the emergency news with greater possibilities. The end -to -end delays of the four relay ...

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Abstract

The invention discloses an Internet of Vehicles multi-hop broadcasting method based on a message type and a network connection state, and the method comprises the following steps: determining the type of an emergency message to be broadcasted by a source vehicle according to the severity of a detected emergency event; determining a network connection state by the current relay according to the one-hop neighbor information table, the retransmission times of the message and the current relay; according to the network connection state and the emergency message type, the current relay determines a relay strategy, fills the control message and broadcasts the emergency message according to the corresponding strategy; according to the control message, the candidate relay sets corresponding waiting time or adopts a responsibility transfer mechanism; and upgrading the candidate relay broadcasted first to the current relay, and repeating the steps until the emergency message is transmitted to the target area. The method is suitable for transmitting different types of emergency messages in an intermittent network, can adaptively adjust the relay strategy according to different network connection states and message types, and ensures that the emergency messages are transmitted to the target area with low time delay and high probability.

Description

Technical field [0001] The present invention is the field of communication in the Internet of Vehicles, involving a broadcast strategy of different types of emergency messages under various vehicle communication networks, and specifically involves a multi -jump broad broadcast method based on a message type and network connection state. Background technique [0002] According to some statistical results, the number of domestic vehicles has been growing, which has made the problem of road safety caused by vehicle expansion. Many accidents are because the driver has no pre -alert to the danger of the surroundings and cannot take secondary damage caused by action in advance. The current traffic communication system is not enough to support the rapid early warning of the existing complex transportation environment, which makes the communication between vehicles that communicate with each other and the mutual warning becomes very necessary. The connected vehicle is the core technology...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04W4/40H04W40/22
CPCH04W4/06H04W4/40H04W40/22Y02D30/70
Inventor 邓祖稳刘徐迅唐锟
Owner SOUTH CHINA UNIV OF TECH
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