Synchronized ring software download
US7478382B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2004 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Mar 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
According to a disclosed embodiment of the invention, software download and installation in a ring network are synchronized in a two-stage operation in order to minimize service disruption time. In a first phase, the MPM's and UIM's in all the nodes are upgraded in parallel. Each node has two main processing modules, allowing one to be upgraded while the other continues to operate the node. In a second phase, the RIM's at the edges of a single ring segment are upgraded, one ring segment after the other, during which time each terminal node continues to operate with respect to the span connecting to its opposite side. While a span is non-operative, traffic is wrapped or diverted as necessary to maintain service of the ring. While one RIM of a node is being upgraded, the other RIM remains operational.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.