Network function virtualization (“NFV”) based communications network resilience
US10397044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2018 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Feb 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2212/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The problem of recovering from multiple link failures in a way that is quick, avoids loops, avoids packet modifications, and that avoids significant modifications to existing routers is solved by: (1) associating a network rerouting unit (NRU) with each of the plurality of routers; (2) configuring each router so that if a link (or more specifically, any link) directly connected to the router fails, the router redirects any packets whose next hop is a port terminating an end of the failed link to the NRU associated with the router; (3) executing a routing protocol on each of the NRUs whereby each NRU will learn a topology of the communications network; (4) receiving by a first NRU, a packet redirected from the router associated with the first NRU; and (5) responsive to receiving, by the first NRU, the packet redirected from the router associated with the first NRU, (i) identifying a link directly connected to the router as a failed link using a destination address in the redirected packet, and the topology of the network learned by the first NRU, (ii) determining an alternative path to the destination address of the redirected packet bypassing the identified failed link, and (iii) t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.