Local preference in anycast CDN routing
US12143443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2023 |
| Grant date | Nov 12, 2024 |
| Priority date | — |
| Expiry date | Jul 17, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/63
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments herein describe a CDN where anycast routing is used to identify a load balancer for selecting a cache in the CDN to use to deliver a requested object to a user. In one embodiment, the user performs a DNS lookup to identify an anycast IP address for a plurality of load balancers in the CDN. The user can then initiate anycast routing using the anycast IP address to automatically identify a load balancer. Once the identified balancer selects the cache, the load balancer can close the anycast connection with the user device and use a redirect to provide the user device with a unicast path to the selected cache. The user device can then establish a unicast connection with the cache to retrieve (e.g., stream) the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.