US Patent 7797402 Audio-visual navigation and communication dynamic memory architectures

Buffering data associated with a spatial publishing object data store at a buffer distance proximate a user presence in a spatial publishing object space. The buffer distance comprises a measure based at least in part on: capacity of a communications path between the data store and the user platform; availability of memory at the user platform; movement of a user presence through the space; traffic in the communications path; processing resources available; amount of objects within a distance of the user presence; amount of objects in the space; type of objects; proximity of objects to the user presence; and rate of the user presence movement in the space. Movement of the user presence in the space buffers data such that data for a proximate object is available in the buffer for presenting to the user when the user's presence is a predetermined distance from the proximate object.