The service triggering mechanism of current IMS not only leads to heavy load of the S-CSCF entities, but also limits the provision of feasible service which makes use of context information. Thus, a ubiquitous-computing enabled service triggering and executing pattern in converged network is introduced. Via analyzing service pattern of current IMS architecture, a novel mechanism that introduces P2P like service triggering based on terminal side coordination is introduced, which results in the conversion from central service control to the negotiation service triggering pattern based on context information among terminals. In this new service pattern, context aware triggering is supported. Moreover, service can be executed in a distributed way which means service logic can be composed of terminal and server parts. A detail scenario is also discussed in this paper.
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