Estimating available bandwidth and enhancing narrow link bandwidth estimations in telecommunications networks using existing user traffic
US7768933B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 14, 2005 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Oct 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/106
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Without using additional probing packets, estimates of the narrow link bandwidth and available bandwidth of a network path are computed based on existing traffic. The network can be of different types such as a wireless battlefield network context or a wired or wireless commercial network environment. “Fast packets”, i.e. those packets which do not experience any queuing delay in the network, are identified. Fast packets are identified to resolve end-to-end packet delay into its constituent components (deterministic, transmission and queuing delays), estimate path utilization and eliminate the uncertainty (false alarms) that causes the prior art method to lose its effectiveness. An estimation algorithm computes end-to-end transmission delay and end-to-end deterministic delay of fast packets traveling along a path in a network. Examples of deterministic delay include satellite propagation delays and clock effects. Then, based on the results of the fast packet identifying algorithm, two logic branches are followed. A first branch calculates utilization and a second branch calculates narrow link bandwidth. The narrow link bandwidth is determined from the packet pair dispersion. The av…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.