Design and Hardware Implementation of Improved Precision Time Protocol for High Speed Automotive Wireless Transmission System

In this paper, a proposed hardware architecture implementation of more accuracy Precision Time Protocol (PTP) is presented. This approached design can be integrated into the wireless communication system for factory automation (FA) devices. In order to increase the closeness of the PTP harmony, we propose two approaches to improve the accurate synchronization to the nanosecond level by reducing the effects of asymmetric path delays of transmissions between master (MS) and slave (SL). The first one is the PTP protocol implementation at PHY layer to remove the random transmission jitters caused by higher layers. The second one is the full hardware implementation to remove the imbalanced timing made by the uneven hardware designs between MS and SL. Besides, a low overhead 3-frames exchange PTP approach to increase throughput of the transmission system is presented. We also implement successfully the PTP hardware design architecture and the SoPC of PHY-MAC and PTP integration system.