CONTENT PROTECTION BASED ON WIRELESS PROXIMITY ESTIMATION

摘要

A wireless content protection system includes a coordinator, a source device, and a sink device. The coordinator includes a scheduler. The source and sink devices each have a content protection manager. One of the content protection managers allocates and releases bandwidth via the coordinator for a test message and a response message for a round-trip time computation. The protected content can then be transmitted only if the distance between the source and the sink estimated through said round-trip time measurement is within an allowed range.