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Vehicle-mounted opportunistic network file scheduling and data transmission algorithm

A technology for data transmission and network files, applied in transmission systems, vehicle components, vehicle-to-vehicle communication, etc. It can solve the problems of wasting link resources, limiting network performance, and inability to flexibly schedule files, so as to improve the success rate and reduce consumption. , to avoid the effect of network-wide information scheduling

Active Publication Date: 2020-01-03
XUZHOU COLLEGE OF INDAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this strategy seems to be relatively fair, in an opportunistic network environment, this strategy cannot flexibly schedule files according to the current link status, resulting in a waste of more link resources
Another congestion-based opportunistic scheduling algorithm OCCS, when the vehicle sends a file, it points to the target receiving vehicle, and the sending vehicle sends the file in a multi-copy manner according to a certain probability according to the congestion degree of the file, but this transmission method increases the consumption of network resources
Therefore, due to the sending principle, the further improvement of network performance is limited

Method used

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  • Vehicle-mounted opportunistic network file scheduling and data transmission algorithm
  • Vehicle-mounted opportunistic network file scheduling and data transmission algorithm
  • Vehicle-mounted opportunistic network file scheduling and data transmission algorithm

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Embodiment Construction

[0048] A vehicle-mounted opportunistic network file scheduling and data transmission algorithm, including a wireless communication module arranged in the vehicle and a communication base station arranged near the driving road, specifically includes the following steps:

[0049] Step 1: Establish an encounter probability data transmission model based on speed difference and time interval, select an appropriate communication distance between the vehicle and the intermediate node and provide an effective theoretical analysis tool for completing data transmission;

[0050] a1: if Figure 5 As shown, since the speed difference and the time interval between vehicles traveling on the road are random and their values ​​cannot be determined, the vehicle speed difference and the time interval between vehicles satisfy the probability distribution of continuous random variables;

[0051] The time when the previous vehicle A enters the coverage area of ​​the base station is denoted as t A...

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Abstract

The invention provides a vehicle-mounted opportunistic network file scheduling and data transmission algorithm, which comprises a wireless communication module arranged in a vehicle and a communication base station arranged near a driving road, and specifically comprises the following steps: 1, establishing an encounter probability data transmission model based on a speed difference and a time interval; 2, periodically broadcasting own state information and a driving route in a future period of time to a neighbor node by a vehicle node in a driving process, and calculating a link duration setC; and 3, calculating the transmission sequence of the files of the nodes in the sending queue, and selecting the files to send. The algorithm is high in transmission reliability, high in transmissionrate and low in network resource consumption, and has obvious advantages in the aspects of file transmission success rate, network average time delay, network load rate and the like.

Description

technical field [0001] The invention relates to a vehicle-mounted opportunistic network file scheduling and data transmission algorithm. Background technique [0002] With the increasing number of road vehicles, in-vehicle opportunistic networks have become a current research hotspot. However, it faces many problems, such as high-speed changes of vehicle nodes, complex and changeable communication environment, dynamic topology changes, and uneven transmission node density. These problems seriously affect the communication performance and data transmission rate of the vehicle opportunistic network. [0003] The link quality of vehicular opportunistic networks is affected by frequent vehicle movement and network topology changes. When the link quality is unstable, data packets are lost during transmission, and the receiver cannot reconstruct the original data. In this case, only the retransmission of the data packet can be performed, or the entire file can be discarded. Whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/46H04W4/44H04W40/18H04L29/08H04W4/02H04W40/20
CPCH04W4/46H04W4/44H04W40/18H04L67/06H04W4/025H04W4/026H04W4/027H04W40/20Y02D30/70
Inventor 龙浩霍娜
Owner XUZHOU COLLEGE OF INDAL TECH
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