Technique for maintaining and enforcing relative policies with thresholds
US9197533B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Nov 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/125
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A technique dynamically maintains and enforces relative policies for a prefix in a computer network. According to the novel technique, a node (e.g., an optimized edge router, OER) monitors performance characteristics for a particular prefix policy over a current path, and maintains a long-term average (LTA) value and a short-term average (STA) value of the performance characteristic. In the event the STA is worse than the LTA by a configurable amount, the prefix is considered “out-of-policy” (OOP) for that policy, and a new path may be selected accordingly. Otherwise, the prefix is considered “in-policy,” and the current path is upheld. Notably, a threshold may be manually configured to account for slow performance deterioration or “spikes,” such that if the performance characteristic (or STA) surpasses the threshold, the prefix is considered OOP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.