Media Playlist Expiration Management for Streaming Servers

The patent applies preliminary action by embedding expiration information (such as EXPIRES tags) into the playlist file before the client requests it. This allows the client to proactively know when content will expire and refresh the playlist accordingly, preventing access to expired content. The server also receives notification of expiration and can proactively remove or update expired content, ensuring reliable content lifecycle management.

The patent applies dynamics by making the playlist file dynamic with embedded expiration timestamps. Instead of maintaining static cached files indefinitely, the system dynamically tracks content expiration and automatically refreshes or removes content based on the expiration information. This allows the server to efficiently manage storage by removing expired content while ensuring clients receive updated playlists before their cached content expires.

The patent applies feedback by embedding expiration information in the playlist that provides feedback to the client about when the cached content will expire. The client uses this feedback to determine when to refresh the playlist, ensuring content freshness while maintaining playback continuity. The server also receives feedback about expiration and can enforce updates by removing or replacing expired content.