Inter-vehicle communication implementation method based on OCC double-exposure-duration camera receiving mode and distance perception
A technology of inter-vehicle communication and receiving mode, which is applied in the field of inter-vehicle communication based on OCC double-exposure time-length camera receiving mode and distance perception, which can solve the problems of limiting inter-vehicle communication transmission distance and communication quality, and improve system throughput , Expand the communication distance, improve the effect of communication quality
Active Publication Date: 2021-06-01
JILIN UNIV
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However, in actual scenarios, this single fixed transceiver mode will greatly limit the transmission distance and communication quality of inter-vehicle communication.
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[0032] The invention provides a method for realizing inter-vehicle communication based on OCC double-exposure duration camera receiving mode and distance perception. In order to make the technical solution and features of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings.
[0033] figure 1 It is a schematic diagram of the inter-vehicle communication scenario based on the OCC double-exposure duration camera receiving mode and distance perception. Car A is the sending end, and cars B, C, and D are receiving ends. The receiving end camera includes two receiving modes: long exposure time and short exposure time. Car A sends the information transmitted to cars B, C, and D through the 8×8 LED array at the rear. Cars B, C, and D analyze the number of pixels occupied by the LED array captured by the camera at the receiving end, and independently determine which car A belongs to. The distance range cat...
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The invention relates to an inter-vehicle communication implementation method based on an OCC double-exposure-duration camera receiving mode and distance perception, and the method comprises the following steps: enabling a transmitting end to collect to-be-transmitted information, and classifying the information according to short, medium and long transmitting distance categories to form three paths of code streams; encoding the three paths of code streams in a hierarchical encoding mode to form a data frame to be transmitted; after each LED of the LED array at the transmitting end completes mapping with the code elements in the data frame, transmitting the carried code elements in the form of light by a multi-stage PWM modulation technology of time slot transmission; and enabling a receiving end to realize synchronization with the sending end by receiving the synchronization frame, judging a distance range to which the sending end belongs and a camera mode used when receiving a subsequent data frame according to the synchronization frame, and completing demodulation of data frame information after judgment of a gray threshold. The receiving mode of the receiving end camera is dynamically adjusted by introducing the hierarchical coding and distance sensing technology, the inter-vehicle communication quality can be effectively improved, the communication distance is expanded, and the system throughput is improved.
Description
technical field [0001] The invention relates to the technical fields of optical communication and intelligent transportation, in particular to a method for realizing inter-vehicle communication based on OCC double-exposure duration camera receiving mode and distance perception. Background technique [0002] Optical Camera Communication (OCC) uses high-speed flashing LEDs as the sending end, free space as the channel, and the camera as the receiving end to transmit information. It is a green and environmentally friendly communication technology that is free from electromagnetic interference. OCC technology uses light as a carrier, and can realize reliable transmission of information in the Internet of Vehicles under the condition of poor network quality. At the same time, OCC technology uses the camera as the receiving end, which has a natural diversity receiving advantage, and can realize MIMO without changing the infrastructure. Therefore, applying OCC technology to the Int...
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IPC IPC(8): H04B10/50H04B10/524H04B10/60
CPCH04B10/502H04B10/524H04B10/60
Inventor 石文孝刘安琪邵馨蕊刘维孙宇峰王强
Owner JILIN UNIV