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QoS-based recovery of multimedia objects

Distributed applications such as teleconferencing using high-speed networks are realized by using multiple multimedia objects. It is critical to discuss how a multimedia object supports quality of service (QoS) required by applications in the presence of object faults. We newly define global states of objects, which are consistent with respect to QoS supported by objects. Based on the QoS-based consistency, we discuss the recovery of objects from some states which do not satisfy QoS.