ALEXANDRIA, Va., June 12 -- United States Patent no. 12,301,689, issued on May 13, was assigned to Comcast Cable Communications LLC (Philadelphia).

"Content delivery network routing using border gateway protocol" was invented by Brian Field (Evergreen, Colo.), Jan Van Doorn (Castle Rock, Colo.) and Jim Hall (Centennial, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An announcement protocol may allow disparate, and previously incompatible, content delivery network caches to exchange information and cache content for one another. Announcement data may be stored by the respective caches, and used to determine whether a cache is able to service an incoming request. URL prefixes may be included in the anno...