公开(公告)号：US20200220636A1

公开(公告)日：2020-07-09

申请号：US16595322

申请日：2019-10-07

Applicant: ADVA Optical Networking SE

Inventor： Michael RABINOVICH ,  Moshe TOFEF ,  Igal PINCHASOV

IPC: H04J3/06 ,  H04L7/00 ,  G06F1/14 ,  H04L12/26 ,  G06F9/54 ,  H04L29/06

Abstract: There is provided a technique of time delivery in a computing system comprising a system call interface (SCI) located in a kernel space and operatively connected to a time client located in a user space. The technique comprises: using a time agent component located in the user space to measure data indicative of delay in a system time delivery and to derive therefrom a system time delivery error TES2C; using TES2C to enable correction of system time; and sending by the SCI the corrected system time in response to a “Read Clock RT” (RCRT) call received from the time client. The method can further comprise: measuring data indicative of delays in the system time delivery for RCRT calls with different priorities; and in response to a system time request received from the time client, providing the time client with system time corrected per TES2C corresponding to the recognized priority thereof.

公开(公告)号：US20230076889A1

公开(公告)日：2023-03-09

申请号：US17941637

申请日：2022-09-09

Applicant: ADVA Optical Networking SE

Inventor： Michael RABINOVICH ,  Moshe TOFEF

IPC: H04J3/06

Abstract: There is provided a method of clock recovery and a system thereof. The method comprises: by master clock node or by client clock node, generating a first flow of time-stamped packets bearing indication of high priority of delivery and, in parallel, generating a second flow of time-stamped packets bearing indication of lower priority of delivery. By client clock node, processing the packets from the first flow separately from the packets from the second flow to define, separately for each flow, a function informative of changes of packets' delays in the respective flow over time; using the defined functions informative of changes of packets' delays in the first and the second flows over the same time intervals to assess a cause of the packets' delays changes; and applying a clock recovery algorithm in a manner differentiated in accordance with the assessed cause.