Packet transmitter and method for timestamping packets
US9929928B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 2015 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Dec 24, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/0852
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmit datapath and a method for timestamping packets. The datapath comprises a timestamp unit located along a packet bus. The timestamp unit is configured to timestamp a packet with its predicted departure time onto a link, the predicted departure time based on an actual departure time of a preceding packet and the lengths of all intervening packets, when the packet bus has been continuously full of the intervening packets. The method comprises determining the predicted departure time of a packet based on an actual departure time of a preceding packet and the lengths of all intervening packets, minimizing the inter-frame gaps between the intervening packets, and timestamping the packet with the predicted departure time. The timestamp method may be a 1-step timestamp method. A packet may be timestamped with its predicted departure time upstream from where the packet is protected. The protection may be MACSec protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.