公开(公告)号：US20160269167A1

公开(公告)日：2016-09-15

申请号：US15164541

申请日：2016-05-25

Applicant: ABB Research Ltd

Inventor： Hubert Kirrmann ,  Jean-Charles Tournier

IPC: H04L7/00 ,  H04L29/06 ,  H04J3/06

CPC classification number: H04L7/0008 ,  G04G7/00 ,  H04J3/0664 ,  H04J3/067 ,  H04L9/3242 ,  H04L63/123

Abstract: The present disclosure provides a secure one-step IEEE 1588 clock using either a symmetric or asymmetric protection scheme. Clocks of mission-critical or highly-available devices in industrial automation systems connected to a communication network are synchronized by sending, by a master clock, a synchronization message, e.g., a single message of the one-step-clock type according to IEEE 1588, including a time stamp, and by receiving and evaluating, by a slave clock, the synchronization message. A synchronization component or module of the master clock prepares, or composes, prior to a projected send time, a synchronization message including a time stamp of the projected send time, and secures the synchronization message in advance of the projected send time. Securing the synchronization message occurs by suitable cryptographic means allowing for authentication of the time stamp at a receiving slave clock. At the projected send time, the secured synchronization message is transmitted.

Abstract translation: 本公开提供了使用对称或非对称保护方案的安全的一步IEEE 1588时钟。 连接到通信网络的工业自动化系统中的任务关键或高可用设备的时钟通过主时钟发送同步消息（例如，根据IEEE 1588的一步时钟类型的单个消息）来同步 ，包括时间戳，并且通过从属时钟接收和评估同步消息。 主时钟的同步组件或模块在投影的发送时间之前准备或组合包括投影的发送时间的时间戳的同步消息，并且在预计的发送时间之前确保同步消息。 通过允许在接收从时钟处的时间戳的认证的合适的加密装置发生保护同步消息。 在预计的发送时间，发送安全的同步消息。

公开(公告)号：US09106595B2

公开(公告)日：2015-08-11

申请号：US13741857

申请日：2013-01-15

Applicant: ABB RESEARCH LTD

Inventor： Hubert Kirrmann ,  Jean-Charles Tournier

IPC: H04L12/42 ,  H04J3/06 ,  H04L12/861 ,  H04L12/40 ,  H04L12/403 ,  H04L12/413 ,  H04L12/43 ,  H04L12/801 ,  H04L12/853 ,  H04L12/851

CPC classification number: H04L49/9094 ,  H04L12/4015 ,  H04L12/40156 ,  H04L12/40182 ,  H04L12/403 ,  H04L12/413 ,  H04L12/43 ,  H04L47/10 ,  H04L47/2416 ,  H04L47/245 ,  H04L2012/4026 ,  H04L2012/40273

Abstract: Exemplary embodiments are directed to a communication network interconnecting a plurality of synchronized nodes, where regular frames including time-critical data are transmitted periodically or cyclically, and sporadic frames are transmitted non-periodically or occasionally. For example, each node can transmit a regular frame at the beginning of a transmission period common to, and synchronized among, all nodes. Another node then receives regular frames from its first neighboring node, and forwards the frames within the same transmission period and with the shortest delay, to a second neighboring node. Furthermore, each node actively delays transmission of any sporadic frame, whether originating from an application hosted by the node itself or whether received from a neighboring node, until forwarding of all received regular frames is completed.

Abstract translation: 示例性实施例涉及互连多个同步节点的通信网络，其中包括时间关键数据的规则帧周期性或周期性地传输，并且非周期地或偶尔地发送零星帧。 例如，每个节点可以在所有节点共同并同步的传输周期的开始处发送常规帧。 然后另一节点从其第一相邻节点接收规则帧，并且将相同传输周期内的帧以最短延迟转发到第二相邻节点。 此外，每个节点主动地延迟任何零星帧的传输，无论是源自节点本身承载的应用，还是从相邻节点接收的，直到所有接收的规则帧的转发完成为止。

公开(公告)号：US10148411B2

公开(公告)日：2018-12-04

申请号：US15164541

申请日：2016-05-25

Applicant: ABB Research Ltd

Inventor： Hubert Kirrmann ,  Jean-Charles Tournier

IPC: H04L7/00 ,  H04J3/06 ,  H04L29/06 ,  G04G7/00 ,  H04L9/32

Abstract: The present disclosure provides a secure one-step IEEE 1588 clock using either a symmetric or asymmetric protection scheme. Clocks of mission-critical or highly-available devices in industrial automation systems connected to a communication network are synchronized by sending, by a master clock, a synchronization message, e.g., a single message of the one-step-clock type according to IEEE 1588, including a time stamp, and by receiving and evaluating, by a slave clock, the synchronization message. A synchronization component or module of the master clock prepares, or composes, prior to a projected send time, a synchronization message including a time stamp of the projected send time, and secures the synchronization message in advance of the projected send time. Securing the synchronization message occurs by suitable cryptographic means allowing for authentication of the time stamp at a receiving slave clock. At the projected send time, the secured synchronization message is transmitted.

公开(公告)号：US09876683B2

公开(公告)日：2018-01-23

申请号：US14577115

申请日：2014-12-19

Applicant: ABB RESEARCH LTD

Inventor： Hubert Kirrmann

IPC: H04L12/24 ,  H04L12/26 ,  H04L7/00

CPC classification number: H04L41/12 ,  H04L7/00 ,  H04L41/0206 ,  H04L41/046 ,  H04L43/0852 ,  Y04S40/164 ,  Y04S40/168

Abstract: A network management agent, device or module determine the network topology of a communication network based on at least one neighbor network or end device identity and corresponding network link communication delay collected from, determined by, and stored in a Management Information Base of, at least one first network device of the communication network. Neighbor identities and communication delays are determined according to the IEEE 1588 standard.