Message distribution method for vehicle-mounted self-organizing network based on connectivity probability perception

A vehicle-mounted self-organization and message distribution technology, applied in the field of network communication

Active Publication Date: 2014-10-01
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of end-to-end message distribution scenarios such as unicast, traditionally based on greedy transmission methods

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  • Message distribution method for vehicle-mounted self-organizing network based on connectivity probability perception
  • Message distribution method for vehicle-mounted self-organizing network based on connectivity probability perception
  • Message distribution method for vehicle-mounted self-organizing network based on connectivity probability perception

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] 1. Analysis of road connectivity probability model

[0025] 1. Vehicle spacing distribution

[0026] The connectivity probability analysis of vehicular ad hoc networks is mostly based on the research of vehicle distance. In order to simplify the analysis process, it is assumed that the traffic flow direction of the road is east-west and north-south, and the roads are all one-way. The observation point is located at a crossroad or a fork, and is used to record passing vehicles within a unit time (such as 1 hour). The traffic state is free circulation state, there are no traffic lights at the intersection, drivers can drive according to their own wishes, so the vehicles are independent of each other.

[0027] Theorem 1: Assume that the number of vehicles passing the observation point per unit time obeys the λ Poisson distribution {X(t), t≥0}, {T n , ...

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Abstract

The invention discloses a message distribution method for a vehicle-mounted self-organizing network based on connectivity probability perception. The method is characterized in that firstly, on the premise that a road is in a freely-connected state, a multi-lane connectivity probability analysis model based on the vehicle speed is researched; the model mainly pays attention to connectivity probabilities of all road segments, and the road connectivity probabilities of multiple lanes are derived based on former research and analysis. In addition, the message distribution method for the vehicle-mounted self-organizing network based on connectivity probability perception (short for CPAM) is provided for a unicast scene and other end-to-end message distribution scenes. The method is divided into two levels, on the macro-level, road segments with the high connectivity probabilities serve as paths for forwarding of data packets, on the micro-level, multi-hop broadcast based on neighbor information is conducted for each road segment, and the data packets can be quickly transmitted to road segment exits from road segment entrances.

Description

technical field [0001] The invention relates to a message distribution method of a vehicle ad hoc network based on connectivity probability perception, and belongs to the technical field of network communication. Background technique [0002] With the rapid growth of my country's economy in the past ten years, cars have become more and more popular in ordinary families. According to data released by the Ministry of Public Security, the number of motor vehicles in the country reached 250 million by the end of 2013, of which 137 million were cars, an annual increase of 16.51 million. According to the growth rate of population and economy, the development of motor vehicle ownership can be roughly divided into three stages: 1) rapid growth period; 2) slow growth period; 3) stable period. my country is currently in a period of rapid growth, and in another ten years, my country's auto market will usher in a new milestone. The production and sales of new cars will reach the sum of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W40/02H04W40/24H04W84/18
Inventor 赵海涛彭江琴刘南杰朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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