QUERY CACHING IN A SYSTEM WITH A CONTENT DIRECTORY SERVICE

摘要

A caching device (70) queries (203a) the CDS of a serving device (MS-a) for media content information and stores the results (204a) for later retrieval. The query (203a) can be made in response to receiving a request (202) from a querying device (UI, 21) to perform the query or in response to a query formulated by the caching device itself. The cached results can be accessed by the querying device in preference to re-performing the required query. The cached results can be maintained up-to-date at the request of the querying device (21) or automatically without involvement of the querying device.