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Terminal-assisted synchronization method and system for IoV intelligent transportation system

An intelligent transportation system and auxiliary synchronization technology, applied in the field of Internet of Vehicles, can solve the problems of high complexity and low synchronization accuracy, and achieve the effect of reducing delay

Active Publication Date: 2022-03-08
SHANGHAI UNIV
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  • Application Information

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Problems solved by technology

However, most of these existing technologies have high complexity, low synchronization accuracy or easy to cause a large amount of processing delay, and it is difficult to meet the needs of existing technologies

Method used

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  • Terminal-assisted synchronization method and system for IoV intelligent transportation system
  • Terminal-assisted synchronization method and system for IoV intelligent transportation system
  • Terminal-assisted synchronization method and system for IoV intelligent transportation system

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Embodiment Construction

[0026] like figure 1 As shown, it is an example of the intelligent transportation system involved in this embodiment. This scene has M self-driving cars, where v=[v 0 , v 1 ,...,v M-1 ] of the vehicle platoon system and the moving vehicle v S mutual driving. In order to ensure safe driving, v S and v try to communicate with each other via the LTE-V sidechain communication protocol. Before direct transmission, a synchronization process is required in the V2X network, which usually includes Sidechain Primary Synchronization Signal (PSSS) and Sidechain Secondary Synchronization Signal (SSSS) synchronization.

[0027] According to the agreement, the sidechain transmission follows the traditional LTE uplink transmission scheme, which occupies 62 subcarriers through a single carrier frequency division multiple access (SC-FDMA) transmission scheme. The above synchronization process is performed every 160 milliseconds, and a detailed sidechain synchronization signal is generated...

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Abstract

A terminal-assisted synchronization method and system for an intelligent transportation system of the Internet of Vehicles. When the V2X network synchronization process is started, an oncoming vehicle sends a side chain synchronization signal to a synchronization node, and the synchronization node uses PSSS and SSSS in the side chain synchronization signal. The position of the signal and the side chain synchronization ID information are sent to other vehicles in the fleet, and other vehicles generate reference PSSS and SSSS sequences according to the received ID information, and use the received PSSS and SSSS position information to perform small-scale standard cross-correlation calculations , to achieve fast synchronization, the present invention uses shared information from other cooperative vehicles to restore the original sent SSSS signal, and jointly calculate the cross-correlation between the received signal and the pre-defined PSSS and generated SSSS signal to achieve synchronization ID detection is correct performance improvement in terms of rate, and greatly reduced processing latency.

Description

technical field [0001] The present invention relates to a technology in the field of Internet of Vehicles, specifically a terminal-assisted synchronization method and system for an intelligent transportation system of the Internet of Vehicles, which can be applied to fleet scenarios of popular intelligent transportation systems, including LTE communication and 5G communication. Background technique [0002] In cellular systems, such as Long Term Evolution (LTE) and Fifth Generation New Radio Network (5G-NR), synchronization can be performed at different levels, such as symbol level or frame level, and multi-level synchronization is usually used in practical systems. Coarse synchronization with Global Navigation Satellite System (GNSS) or Precision Time Protocol (PTP / IEEE 1588), and fine synchronization with dedicated synchronization reference signals (including Primary Synchronization Signal PSS and Secondary Synchronization Signal SSS). [0003] Existing synchronization te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/40H04W4/44H04W4/46H04W4/70H04W56/00H04L27/26
CPCH04W4/40H04W4/44H04W4/46H04W4/70H04W56/0015H04L27/2665
Inventor 陈子宣张舜卿曹姗徐树公师毅
Owner SHANGHAI UNIV
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