Feedback control method and device in ATM switching system
US6671257B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2000 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Feb 5, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5652
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an ATM switching system, an ABR service is implemented with a specific ABR control capability. A subscriber line processing device includes calculating a turnaround delay time of a cell, based on a period during which the cell doubles back at a terminal. A switch or a demultiplexer capable of detecting congestion. A rate calculator calculates a transmission rate corresponding to an output channel, and writes the calculated rate to the cell. A rate changer changes the transmission rate according to congestion. The rate changer counts the number of communicating connections. Then the number of communicating connections which should exist in a certain predetermined period is estimated based on the counted number of communicating connections. A coefficient is determined based on the estimated number of communicating connections and an actual number of communicating connections, and a next estimated value is estimated using the coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.