Relay communication method based on cooperated multi-access control (MAC) protocol in vehicular automatic organization network

A self-organizing network and relay communication technology, which is applied in the field of vehicle wireless communication, can solve the problems of expensive facilities, real-time difficulties, ineffective use of channels, and limited communication range, so as to improve communication reliability, solve the problem of limited communication range, The effect of reducing transmission delay

Active Publication Date: 2013-01-30
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

[0005] The present invention aims at the technical problems in the prior art that the communication in the high-speed mobile VANET

Method used

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  • Relay communication method based on cooperated multi-access control (MAC) protocol in vehicular automatic organization network
  • Relay communication method based on cooperated multi-access control (MAC) protocol in vehicular automatic organization network
  • Relay communication method based on cooperated multi-access control (MAC) protocol in vehicular automatic organization network

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Embodiment Construction

[0018] The invention proposes a relay communication method based on cooperative MAC protocol in VANET environment. Specifically include the following steps:

[0019] Construct the data frame format. Set the data frame in the DCF frame format as S-DATA (only store data packets) and R-DATA (data packets to be forwarded), so that they carry the parameters required for relay selection.

[0020] According to the frame format of the existing 802.11 DCF mode, the DATA frame in the DCF frame format is divided into S-DATA and R-DATA, so that RTS (request to send), CTS (confirmation to send), RI (relay message), DATA (data Frame) can carry relevant information required for relay selection and data transmission, including link data rate R, actual rate V, relay node address information, Partner ID (assistant ID) and data frame indication CF, etc. like figure 1 Shown is a schematic diagram of the modified frame format, where Frame Control means frame control; Duration means duration, wh...

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Abstract

The invention relates to a vehicular wireless communication field technology, in particular to a relay selection method and a multi-access control (MAC) protocol suitable for various mobile scenes. The invention discloses a relay communication method based on a cooperated MAC protocol in a vehicular automatic organization network. A relay is jointly selected according to a data rate and the mobility; the data rate is limited, so that the number of effective relays and fed-back information amount are greatly reduced, and the effectiveness of relay selection is improved; the selected relay group has relatively high link quality and can meet demands of various mobile scenes; the interruption probability and the error rate of a system can be reduced; and therefore, reliable transmission of data in the network can be effectively realized.

Description

technical field [0001] The invention relates to the technology in the field of vehicular wireless communication, in particular to a relay selection method and a cooperative MAC protocol design method in vehicular wireless communication. Background technique [0002] Vehicle Ad Hoc Network (VANET), referred to as Vehicle Area Network or Internet of Vehicles, is the main component of vehicle wireless communication network. He is an information network that serves various vehicles (vehicle terminals) and road traffic management, and is also a generalized Internet of Things. figure 1 It is the network topology diagram of VANET. The vehicle ad hoc network extends digitalization, networking and intelligence to moving vehicles and roads, enabling vehicle terminals to access the Internet at any time conveniently, so as to obtain various information in a timely manner. Due to the rapid movement of vehicles and the complete randomness of each node's access, this communication method...

Claims

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Application Information

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IPC IPC(8): H04W28/04H04W80/02H04W84/18
Inventor 唐伦刘剑陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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