Yu-Chung Wang

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Researchers in the real-time system community have designed and studied many advanced scheduling algorithms. However, most of these algorithms have not been implemented since it is very difficult to support new scheduling algorithms on most operating systems. To address this problem, we enhance the scheduling mechanism in Linux to provide a flexible(More)
Many scheduling paradigms have been studied for realtime applications and real-time communication network. Among them, the most commonly used paradigms include priority-driven, time-driven and share-driven paradigms. In this paper, we present a general scheduling framework which is designed to integrate these paradigms in one framework. The framework is(More)
This paper describes an embedded workflow framework (EMWF) that enables flexible personal and home automation and assistive devices and service and social robots (collectively referred to as SISARL) to be built on workflow architecture The process definition language supported by EMWF is called SISARL-XPDL. It consists of a subset of the WfMC standard XML(More)
Hierarchical schedulers are useful to in tegrate different scheduling paradigms together. The original RED-Linux general scheduling framework does not support hierarchical sc hedulers eÆciently because the Dispatcher cannot tell whether a job is an aperiodic job or a real-time job. In the w ork reportedin this paper, we add an extra parameter, the group(More)
Failover for service-oriented distributed networks is a prerequisite to enabling Internet-of-Things (IoT) in the sense of deploy-once, run forever. Resource reconfiguration is required to achieve failover mechanisms upon replacement of devices or failure of services. It can be particularly challenging when services in applications have more than end-to-end(More)
Image retrieval has been popular for several years. There are different system designs for content based image retrieval (CBIR) system. This paper propose a novel system architecture for CBIR system which combines techniques include content-based image and color analysis, as well as data mining techniques. To our best knowledge, this is the first time to(More)
The Weighted Fair Queuing (WFQ) scheduler has been closely studied due to its desirable properties of bandwidth guarantee and bounded delay. However, the queuing delay bound of a communication session is tightly coupled with the session's allocated service share. To receive a low queuing delay, a session must reserve a high share. In this paper, we study a(More)