Internet-of-vehicle long distance data communication relay agent method based on fountain code

A data communication and fountain code technology, applied in wireless communication, network topology, digital transmission system, etc., can solve problems such as low decoding success rate, high coding and decoding complexity, and non-linear growth of decoding complexity, and achieve the goal of decoding The effect of high code success rate, improving data transmission efficiency, and overcoming unreliable connection problems

Active Publication Date: 2017-10-13
XIAMEN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] LT code (Luby Transform Codes) is a typical fountain code. Although it can achieve high decoding efficiency by using a reasonable degree distribution function, its decoding complexity increases nonlinearly.
To

Method used

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  • Internet-of-vehicle long distance data communication relay agent method based on fountain code
  • Internet-of-vehicle long distance data communication relay agent method based on fountain code
  • Internet-of-vehicle long distance data communication relay agent method based on fountain code

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Experimental program
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Embodiment

[0036] This embodiment adopts fountain code RaptorQ encoding (the latest version of Raptor encoding) to transmit data in the vehicle ad hoc network, and selects a reasonable RSU relay node as an agent in multiple transmissions to further improve data transmission efficiency and improve data transmission expected number of retweets.

[0037] A relay agent method for long-distance data communication of Internet of Vehicles based on fountain codes, comprising the following steps:

[0038] S1. The vehicle node at the sending end uses the fountain code to encode the data to be sent;

[0039] The vehicle node at the sending end divides the original data to be sent into m groups, each group contains K minimum data units, and performs Raptor fountain coding on the K data of each group in turn to generate a fountain coded message.

[0040] S2. The relay node forwards the fountain code message, and the roadside unit RSU acts as an agent to decode the fountain;

[0041] S21. The vehicl...

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Abstract

The invention discloses an Internet-of-vehicle long distance data communication relay agent method based on a fountain code. The method comprises steps that S1, the fountain code is utilized by a sending end vehicle node to code sending-needing data; S2, a fountain code message is forwarded by a relay node, and a road side unit (RSU) is taken as an agent for fountain coding; S3, foundation coding of the message after successful coding is carried out for another time by an agent node; and S4, a foundation coding message is received by a reception end vehicle node, and foundation coding is further carried out. The method is advantaged in that the coding process is simplified, a coding success rate is further improved, expected forwarding frequency of data transmission is further improved, and data transmission efficiency is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a relay agent method for long-distance data communication of Internet of Vehicles based on fountain codes. Background technique [0002] Today's vehicle ad-hoc networks (VANETs), also known as the Internet of Vehicles, is an ad-hoc wireless communication network formed with vehicles and roadside facilities as nodes, mainly including vehicle-to-vehicle (V2V) and vehicle-to-vehicle (V2V) Communication with infrastructure (V2I) is an important part of intelligent transportation system. In the Internet of Vehicles, the movement of vehicles causes the instability of the network topology, and frequent connection establishment and disconnection between communication nodes makes the network reliability of the Internet of Vehicles poor. In such an environment, the existing reliable transmission protocols (such as TCP, etc.) based on Automatic Repeat-reQuest (ARQ) will continuously t...

Claims

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Application Information

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IPC IPC(8): H04W40/12H04W40/20H04W40/22H04W84/18H04L1/00
CPCH04L1/0058H04W40/12H04W40/20H04W40/22H04W84/18
Inventor 唐余亮曾文婷徐伟鸿林艺明庄卫华
Owner XIAMEN UNIV
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