Integrated adaptive anycast for content distribution
US10033605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2017 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Jun 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1021
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system includes first and second cache servers a domain name server, and a route controller. The cache servers are each configured to respond to an anycast address. Additionally, the first cache server is configured to respond to a first unicast address, and the second cache server is configured to respond to a second unicast address. The router controller configured to determine wither the status of the first cache server is non-overloaded, overloaded, or offline. The route controller is further configured to instruct the domain name server to provide the second unicast address when the status is overloaded or offline, and modify routing of the anycast address to direct a content request sent to the anycast address to the second cache server when the status is offline. The domain name server is configured to receive a request from a requestor for a cache server address. Additionally, the domain name server is configured to provide an anycast address to the requestor when the status of the first cache server is non-overloaded, and provide the second unicast address to the requestor when the status of the first cache server is offline or overloaded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.