Invention Grant
- Patent Title: Universal asymmetry compensation for packet timing protocols
- Patent Title (中): 分组定时协议的通用不对称补偿
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Application No.: US14149370Application Date: 2014-01-07
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Publication No.: US09264132B2Publication Date: 2016-02-16
- Inventor: George P. Zampetti
- Applicant: Microsemi Corporation
- Applicant Address: US CA San Jose
- Assignee: Microsemi Frequency and Time Corporation
- Current Assignee: Microsemi Frequency and Time Corporation
- Current Assignee Address: US CA San Jose
- Agency: Patterson & Sheridan, LLP
- Main IPC: H04L12/66
- IPC: H04L12/66 ; H04B10/07 ; H04J3/06

Abstract:
The notion of a “PTP aware” path is one current proposed approach to reduce asymmetry effects. In a fully PTP aware path there is the notion of on-path support mechanisms such as boundary clocks and transparent clocks at every switching or routing node. However, on-path support methods only address time-transfer errors introduced inside network elements and any asymmetry in the transmission medium, such as, for example, the fiber strands for the two directions of transmission, cannot be compensated for by on-path support mechanisms. Furthermore, in a real operational network, which may traverse different operational domains administered by different entities, full on-path support is a difficult challenge. In certain managed network scenarios full on-path support can be contemplated. Nevertheless, the universal asymmetry compensation method described herein mitigates the asymmetry in a network path, without requiring on-path support mechanisms such as transparent clocks and boundary clocks.
Public/Granted literature
- US20140192826A1 UNIVERSAL ASYMMETRY COMPENSATION FOR PACKET TIMING PROTOCOLS Public/Granted day:2014-07-10
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