Reliable broadcasting method for hybrid traffic system with formation as center

A mixed traffic, reliable technology, applied in the field of communication, can solve problems such as endangering driving safety, unreliable multi-channel communication performance, uncertainty, etc., to increase retransmission capability, improve broadcast efficiency and throughput, and improve reliability Effect

Active Publication Date: 2020-07-14
TSINGHUA UNIV
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Problems solved by technology

The unreliability brought about by using the CSMA mechanism on the control channel will bring great uncertainty to the multi-channel communication performance between vehicles, and even endanger driving safety.

Method used

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  • Reliable broadcasting method for hybrid traffic system with formation as center
  • Reliable broadcasting method for hybrid traffic system with formation as center

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Embodiment Construction

[0042] The present invention proposes a reliable broadcasting method for a formation-centered mixed traffic system. The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] The present invention proposes a reliable broadcasting method for a mixed traffic system centered on formations. The mixed traffic system consists of unmanned formations and free vehicles driven by humans. The overall flow of the method is as follows figure 1 shown, including the following steps:

[0044] 1) Take the unmanned formation composed of autonomous vehicles and the set of one-hop neighbor nodes to which the formation belongs as the Platoon-centric Wireless Basic Service Set (P-WBSS) centered on the formation; among them, The one-hop neighbor node to which the formation belongs is a vehicle driven by a human; the schematic diagram of the system model of the wireless basic service set centered on the formation in...

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Abstract

The invention relates to the field of communication, in particular to a reliable broadcasting method for a hybrid traffic system with formation as the center. According to the method disclosed in theinvention, a wireless basic service set is formed by taking unmanned formation as a center. Formation vehicles use a TDMA protocol, and other vehicles use a CSMA/CA protocol. According to the method disclosed in the invention, a part of formation members are selected as CTS responders in a basic service set; the RTS/CTS function is realized for broadcast communication of a free vehicle driven by aperson, an RTS/CTS mechanism is introduced for broadcast communication, so that the broadcast communication can have a retransmission capability, and the reliability of the broadcast communication isimproved. According to the method, the topological structure characteristics in the hybrid traffic system are fully utilized, the performance loss caused by collision in wireless communication can begreatly reduced, and therefore the network communication efficiency is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a reliable broadcasting method for a formation-centered mixed traffic system. Background technique [0002] Unmanned driving technology continues to mature. Combining unmanned vehicles into unmanned formations can greatly improve driving efficiency and reduce energy consumption. The distance between vehicles in the formation can be very short, and the topology of the vehicles in the formation can remain stable for a long time. Currently there are many communication systems specially designed for such a formation system, and most of them adopt a non-conflict protocol design method, such as a time division multiplexing (TDMA) method. In real-world application scenarios, unmanned formations will coexist with traditional human-driven vehicles. This kind of traffic system in which unmanned formations and human-driven vehicles coexist is called a hybrid traffic system. In mixed traffic sys...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W4/40H04W28/04G08G1/00G08G1/0967
CPCG08G1/096725G08G1/20G08G1/22H04W4/06H04W28/04H04W4/40
Inventor 王剑黄延
Owner TSINGHUA UNIV
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