Filtering Scheme for Mitigating Synchronization Inefficiency of IEEE 1588 PTP Over Packet-Switched Networks
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초록
Packet-based methods for synchronizing distributed clocks are getting tremendous attention as networks are evolving from the conventional circuit-switched to packet-switched architecture. Packet Delay Variation (PDV) inherent in packet-switched networks, especially when the network is moderately or heavily congested, is a dominant source of clock noise in the packet-based synchronization systems that are based in IEEE 1588 Precision Time Protocol (PTP). This paper presents a non-linear Sample Mode Packet Filtering (SMoPF) mechanism to smooth such a clock noise to enhance the synchronization performance of IEEE 1588 PTP. Performance of the proposed SMoPF mechanism is compared (via computer simulations in OMNET++) with that of existing sample minimum-, sample mean-, and sample-maximum filtering mechanisms considering the IEEE 1588 PTP synchronization domain on top of an arbitrarily congested packet-switched network.
Abstract
Packet-based methods for synchronizing distributed clocks are getting tremendous attention as networks are evolving from the conventional circuit-switched to packet-switched architecture. Packet Delay Variation (PDV) inherent in packet-switched networks, especially when the network is moderately or heavily congested, is a dominant source of clock noise in the packet-based synchronization systems that are based in IEEE 1588 Precision Time Protocol (PTP). This paper presents a non-linear Sample Mode Packet Filtering (SMoPF) mechanism to smooth such a clock noise to enhance the synchronization performance of IEEE 1588 PTP. Performance of the proposed SMoPF mechanism is compared (via computer simulations in OMNET++) with that of existing sample minimum-, sample mean-, and sample-maximum filtering mechanisms considering the IEEE 1588 PTP synchronization domain on top of an arbitrarily congested packet-switched network.
참고문헌 (19)
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