Integration of HSR and IEEE1588 over Ethernet networks

Some of the key infrastructure requirements for Smart Grid are the uninterrupted and reliable distribution of network data, information security and distribution of time information among network elements in order to accurately timestamp and correlate different network events. High Availability Seamless Ring (HSR) enabled networks can provide zero recovery time and PTPv2 enabled network can provide sub-microsecond accuracy. Although the integration of HSR and PTPv2 seem a natural next step to achieve high availability and time synchronization requirements of IEC61850, there are some assumptions made in the design of HSR and PTPv2 that are orthogonal in nature. This paper presents an instance of network design that integrates these two technologies by using the subset of PTPv2 without compromising network precision. Information security is beyond the scope of this paper.