Procedures for improving call routing in PNNI networks
US7283467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Sep 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/247
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for improving call routing in a PNNI network using crankback messaging. A destination logical group node (LGN) blocked crankback procedure is used by entry border nodes, in the event of a failed connection attempt, to instruct preceding routing capable nodes to route the connection over another link. If the entry border node is in the lowest level peer group a Succeeding End Blocked (SEB) crankback message is sent to the preceding routing-capable node. If the entry border node is not in the lowest level peer group, a destination LGN blocked crankback message is sent to the preceding routing-capable node wherein the message has special information to signal the routing node that the link into the destination LGN is blocked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.