Multi-hop warn broadcasting method for urban VANETs

A city, MBW-ONE technology, applied in the direction of broadcasting specific applications, branch offices providing special services, data exchange details, etc., can solve the problems of low broadcast redundancy and delay, incomplete suitability, information redundancy, etc. The effect of network overhead

Active Publication Date: 2015-03-04
HARBIN INST OF TECH
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented technology described in this patents allows vehicles located closer together can receive better situational awareness about their surroundings during an emergency situation such as accidents. By dividing car areas based on factors like speed limits, construction zones, etc., it becomes easier for other drivers to react accordingly. Additionally, there may also include features that help direct specific ones towards safety hazards while minimizing impact upon surrounding people's lives. Overall, these improvements enhance overall vehicle performance and efficiency.

Problems solved by technology

This patented technical describes various techniques used during communication between vehicles (VN) and infrastructure devices like routers or switches. These technologies have limitations due to competitive factors and contamination caused by external sources like collisions with obstacles. To address this issue, there exist proposals involving protocol extensions called multicast transmission systems (MCTS). Multicast refers to transmitting data simultaneously over one network path towards many receivers without causing any overlap issues. By selecting appropriate neighbors based upon their proximity to specific points within the route's topography, the system reduces message duplication and improves overall efficiency while reducing delays associated with broadcast attacks. Additionally, some proposed locations-based algorithms aim to reduce signal redundancy through selectively targeting certain receiving stations instead of all others.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-hop warn broadcasting method for urban VANETs
  • Multi-hop warn broadcasting method for urban VANETs
  • Multi-hop warn broadcasting method for urban VANETs

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0027] Specific embodiment one: the multi-hop warning broadcasting method of a kind of city VANETs of the present embodiment is specifically prepared according to the following steps:

[0028] Step 1. In the neighbor list, determine the forwarding node and the direction of the forwarding node and the broadcast communication area according to the direction of the car; wherein, the car is divided into two groups on the road; the direction of the car is the opposite direction; the car is divided into four groups at the intersection The broadcast communication area composed of four directions where the direction of the car is an intersection is as follows: figure 1; Neighbor list is to adopt MBW-ONE and MBW-TWO two kinds of methods to realize MBW broadcast protocol respectively; The neighbor list adopted by MBW-TWO selects the relay node, or the neighbor list (neighbor list content is self-defined) and select relay nodes, two strategies, MBW-ONE and MBW-TWO, can be used to forward...

specific Embodiment approach 2

[0040] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 2, the MBW-ONE or MBW-TWO method is used to determine the neighbor node in the neighbor list according to the distance between the current forwarding node and the neighbor nodes of the forwarding node The specific process of forwarding probability Pi:

[0041] In order to limit the number of cars that rebroadcast a message, the WT mechanism for calculating the forwarding message has also been done in previous research work. In the location-based broadcast protocol, the typical WT calculation method is to use some related factors to design the waiting time function, such as broadcasting The infinite communication radius R of the car, the distance between the sender and the receiver, the number and speed of neighbor cars, etc.; the waiting time T defer is called the delay calculation function is given by the following equation (1),

[0042] T ...

specific Embodiment approach 3

[0054] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, both MBW-ONE and MBW-TWO use the hello packet to maintain the neighbor list, and the hello packet contains the Hello field, Position field, Direction field, Hop domain, SID domain, MID domain and VID domain; Wherein, Hello domain represents hello bag, and the position of Position domain mark automobile, and the value of Direction domain is relative to the direction (four directions of intersection) of current forwarding node, and Hop means The hop count of the hello packet, the SID field represents the source node ID number, the MID value is the source node information ID number, and the VID field records the vehicle ID number; when a node receives the hello packet and the Hop field is 0, the MID is saved in pairs and SID; hello packet is 0.1 ~ 2Hz. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a multi-hop warn broadcasting method for urban VANETs (Vehicular Ad-hoc Networks), relates to a multi-hop warn broadcasting method, and aims to solve the problems that the multi-hop broadcast causes information redundancy and information packet collision, a solution of MANET (Mobile Ad-hoc Network) broadcast storm cannot be completely applied to VANET, the existing broadcast storm inhibition method restrains the quantity of relay nodes of forwarding information, and the position-based mechanism causes relatively low broadcast redundancy and delay. The method comprises the following steps: 1, determining forwarding nodes and directions of the forwarding nodes; 2, determining forwarding probability Pi of the neighbor nodes; 3, establishing an exponential equation; 4, determining the relay nodes; 5. rebroadcasting the warn broadcasting information. The multi-hop warn broadcasting method disclosed by the invention can be applied to the field of multi-hop warn broadcast for the urban VANETs.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap