On February 23, 2026, InterDigital and its subsidiary DRNC Holdings filed a lawsuit in the U.S. District Court for the Western District of Texas, alleging that Amazon and its subsidiary Amazon Web Services Inc. infringed multiple content delivery network (CDN) patents acquired through acquisitions.

According to the public complaint, Amazon's Prime Video streaming service, CloudFront content delivery network service, and Fire series terminal devices implement the patented technical solutions in their content caching, request routing, edge node management, and data distribution mechanisms. These implementations fall within the scope of the relevant patent claims. Therefore, InterDigital requests the court to find Amazon liable for patent infringement and order it to bear corresponding damages.

The patents involved in this case include:

US 7,921,259: Pertains to cache update and content invalidation control mechanisms within content delivery networks, focusing on achieving content synchronization and cache consistency management in distributed node environments.

US 10,116,565: Pertains to dynamic content request routing and transmission optimization technology, selecting paths and accelerating processing for user requests based on network status or node load.

US 8,745,128: A distributed cache validation and version control method for verifying content validity and ensuring accuracy in multi-node environments.

US 9,015,416: A content distribution policy and configuration control system covering mechanisms to set distribution rules and cache strategies for different content types.

US 8,868,701: Pertains to edge server resource scheduling and load distribution methods for optimizing bandwidth and computational resource utilization in distributed server environments.

US 8,583,769: Pertains to multi-tier content delivery network system architecture design, including content replication, inter-node collaboration, and request forwarding mechanisms.

...

Scan to access the full text