Method and apparatus for measuring one-way delay at arbitrary points in network
US7519006B1 · kind B1 · utility
65Cited by
24References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2004 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | May 2, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Timestamps are inserted into trace packet expiration messages to identify delay in a network. A Time To Live (TTL) value in the trace packet is varied to intentionally cause an intermediate node in the network to discard the trace packet and send back the packet expiration message. The intermediate node sending the packet expiration message inserts a time value in the message indicating when the intermediate node received the trace packet. The time value is then used to determine the time required for the trace packet to reach the intermediate node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.