Abstract
In this paper we present a novel rejoin scheme for collaborative graphics editing systems in ubiquitous environments. The term `rejoin' is used to donate a mechanism that allows a late-coming participant to join an ongoing collaborative session after he quits from the former session. Generally, this requires that participants in the current session provide the rejoiner with the state of shared workspace to initialize the application instance of the latecomer. We propose the rejoining scheme that is based on the user interest prediction algorithm to promote the efficiency of rejoin process especially for those embedded mobile devices. The scheme and related algorithm are tested in our prototype system and proved that they can work well in ubiquitous environments.
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