V2I/V2V Internet-of-things system based on cognitive OFDM and method thereof

A technology of Internet of Vehicles and transmission method, applied in the field of Internet of Vehicles, can solve the problems of difficult load of 4G cellular network, inability to adapt to dynamic changes, limited capacity of 4G network, etc.

CN105391782AActive Publication Date: 2016-03-09SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-03-09

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Abstract

The invention discloses a V2I / V2V Internet-of-things system based on cognitive OFDM, comprising on-board units and roadside units. The on-board units and the roadside units are configured to carry out wireless communication based on an ISM frequency band to transmit video, voice and text data and provide traffic safety information and traffic condition information for drivers. The invention further provides a mobile ad hoc network information transmission method comprising the following steps: an information collection module starts collecting video, voice, text and other information, and a control host module compresses, codes, packages and modulates the information and sends the modulated information to a sending queue; a sender notifies a receiver in a control channel that the data is about to be sent; the receiver performs spectrum sensing, and feeds a carrier frequency and a subcarrier group of good channel quality currently back to the sender through the control channel; the receiver receives a packet of information, and demodulates and checks the information to obtain check information; and the receiver records the number of times of consecutive packet loss, and decides whether to perform spectrum sensing according to the number of times of packet loss.
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Description

technical field

[0001] The present invention relates to the field of Internet of Vehicles, in particular to a V2V / V2I Internet of Vehicles system based on cognitive OFDM. Background technique

[0002] The Internet of Things uses advanced communication and networking technologies to connect objects into a network and integrate them into the existing Internet, so that people can interact with wide-area and multi-dimensional information in the real world through the Internet of Things and realize human-machine interaction. The seamless integration of physical environment.

[0003] Against the background of the rapid development of the Internet of Things, urban traffic congestion and sustainable development requirements, the Internet of Vehicles has evolved from the Vehicular Ad Hoc Network (VANET) to the era of IoV (Internet of Vehicles). Technologies such as WAVE (Wireless Access in Vehicular Environment) protocol based on IEEE802.11p and Drive-thru based on IEEE802.11b have ...

Examples

Embodiment Construction

[0069] The present invention will be further described below in conjunction with accompanying drawing. This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0070] Such as figure 2 As shown, in this real-time example, both vehicle-mounted units are equipped with vehicle-mounted wireless communication terminals, and the terminals are equipped with USB cameras, microphones and laptops. The roadside unit uses a processor and is equipped with a radio frequency transceiver board for video, sound, text Information reception and restoration display.

[0071] The vehicle-mounted unit collects data while the vehicle is running, and transmits the data to a nearby vehicle-mounted unit, or uploads the data to the roadside unit. The vehicle-mounted unit includes an informatio...