GNSS Aided Precision Multi-clock Synchronization

Precision Time Protocol (PTP) defined by the IEEE standard is a precision clock synchronization protocol (IEEE1588) for achieving high-precision synchronization in distributed systems by means of network communication and local computing technology. Although PTP system offers sub-microsecond clock synchronization in local area network by software-only implementation, it is difficult to meet the requirement of communication network which requires higher clock synchronization performance. This paper proposes a PTP system aided by Global Positioning System (GPS)/BeiDou Navigation Satellite System (BDS), which attains nanosecond performance.