Distributed control of service category request mapping
US6483807B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1999 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Mar 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5636
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Each switch along a call setup path in a network decides whether the call request should be upgraded from a non-flow-controlled service type to a flow-controlled service type. Each switch bases the decision on whether a boolean variable for the calling subscriber that appears in a management information base (MIB) is set to a value indicating that the subscriber is entitled to the upgrade. In addition, the upgrade is performed only if an interface on the route to the called party on which the call setup request is to be forwarded supports flow-controlled connections. When the call is to be upgraded, the switch replaces the service type indicator in the setup message with a value indicating a flow-controlled service type, and forwards the setup message toward the called subscriber. If the MIB variable is set to a value indicating that the upgrade is not to be performed, it is still possible for a subscriber to request flow-controlled service directly, by indicating this service type in the original call setup message. Each switch also makes a call downgrade decision. When a call setup message is received requesting flow-controlled service but destined for an interface that does not …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.