Latency tracking
US10574576B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2017 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Dec 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/618
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Some embodiments of the invention provide a path-and-latency tracking (PLT) method. At a forwarding element, this method in some embodiments detects the path traversed by a data message through a set of forwarding elements, and the latency that the data message experiences at each of the forwarding elements in the path. In some embodiments, the method has a forwarding element in the path insert its forwarding element identifier and path latency in a header of the data message that it forwards. The method of some embodiments also uses fast PLT operators in the data plane of the forwarding elements to detect new data message flows, to gather PLT data from these data message flows, and to detect path or latency changes for previously detected data message flows. In some embodiments, the method then uses control plane processes (e.g., of the forwarding elements or other devices) to collect and analyze the PLT data gathered in the data plane from new or existing flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.