An asynchronous adaptive media server mechanism permits a user to navigate around a modelled multimedia space as quickly as input events or instances are handled. The mechanism permits cancellation of outstanding queued requests that have become obsolete as the user navigates out of the area for which...http://www.google.com/patents/US5544318?utm_source=gb-gplus-sharePatent US5544318 - Asynchronous media server request processing system for servicing reprioritizing request from a client determines whether or not to delay executing said reprioritizing request
