公开(公告)号：US20170237512A1

公开(公告)日：2017-08-17

申请号：US15502856

申请日：2014-09-12

申请人： Siemens Canada Limited

发明人： Michael Galea ,  Michael Pustylnik ,  Amin Abdul

IPC分类号： H04J3/06

CPC分类号： H04J3/0667 ,  H04J3/0641 ,  H04J3/0644 ,  H04W56/001

摘要： A method of facilitating clock synchronization over redundant networks may include, when a SYNC message and a DELAY_REQ message of a PTP clock synchronization cycle are carried by different redundant networks, adjusting a timestamp associated with one of the messages to emulate carriage of the SYNC message and the DELAY_REQ message by the same redundant network. In a method of facilitating PTP clock synchronization, an indicator of an operational status of each of a pair of redundant networks for carrying messages from a slave clock to a master clock may be embedded in a PTP message destined for the slave clock. An indicator of which one of the pair of redundant networks is valid for PTP clock synchronization may be obtained from a PTP message destined for the master clock. PTP messages to the master clock may be selectively relayed based on whether the PTP messages have been received from the valid one of the redundant networks.

公开(公告)号：US11516119B2

公开(公告)日：2022-11-29

申请号：US16971266

申请日：2018-03-23

申请人： Siemens Canada Limited

发明人： Amin Abdul ,  Michael Pustylnik ,  Tiejun Wang

IPC分类号： H04L45/48 ,  H04L41/0813 ,  H04L41/12 ,  H04L45/021 ,  H04L45/28 ,  H04L45/52 ,  H04L45/00 ,  H04L12/46

摘要： A method of providing a path between bridges of a first network segment. The first network segment is configured using a Spanning Tree Protocol (‘STP’). The method includes providing a second network segment interconnecting first and second bridges of said first network segment. The second network segment is operable to transmit frames adherent to a High-availability Seamless Redundancy (‘HSR’) network control protocol and to discard the STP control data frames. The method also includes modifying at a first Redundancy Box (‘RedBox’) STP control data frames to form modified data frames adherent to the HSR protocol. The method also includes modifying at a second RedBox, the modified data frames to re-form the STP control data frames.

公开(公告)号：US10348429B2

公开(公告)日：2019-07-09

申请号：US15502856

申请日：2014-09-12

申请人： Siemens Canada Limited

发明人： Michael Galea ,  Michael Pustylnik ,  Amin Abdul

IPC分类号： H04J3/06 ,  H04W56/00

摘要： A method of facilitating clock synchronization over redundant networks may include, when a SYNC message and a DELAY_REQ message of a PTP clock synchronization cycle are carried by different redundant networks, adjusting a timestamp associated with one of the messages to emulate carriage of the SYNC message and the DELAY_REQ message by the same redundant network. In a method of facilitating PTP clock synchronization, an indicator of an operational status of each of a pair of redundant networks for carrying messages from a slave clock to a master clock may be embedded in a PTP message destined for the slave clock. An indicator of which one of the pair of redundant networks is valid for PTP clock synchronization may be obtained from a PTP message destined for the master clock. PTP messages to the master clock may be selectively relayed based on whether the PTP messages have been received from the valid one of the redundant networks.

公开(公告)号：US20210083969A1

公开(公告)日：2021-03-18

申请号：US16971266

申请日：2018-03-23

申请人： Siemens Canada Limited

发明人： Amin Abdul ,  Michael Pustylnik ,  Tiejun Wang

IPC分类号： H04L12/753 ,  H04L12/703 ,  H04L12/781 ,  H04L12/721 ,  H04L12/755 ,  H04L12/24

摘要： A method of providing a path between bridges of a first network segment. The first network segment is configured using a Spanning Tree Protocol (‘STP’). The method includes providing a second network segment interconnecting first and second bridges of said first network segment. The second network segment is operable to transmit frames adherent to a High-availability Seamless Redundancy (‘HSR’) network control protocol and to discard the STP control data frames. The method also includes modifying at a first Redundancy Box (‘RedBox’) STP control data frames to form modified data frames adherent to the HSR protocol. The method also includes modifying at a second RedBox, the modified data frames to re-form the STP control data frames.