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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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Author: search.filters.author.Chen, JRSubject: search.filters.subject.QoS

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    Providing service differentiation in wireless networks
    (2001-04-01)
    Lee, CL
    ;
    Chen, YC
    ;
    Chen, JR
    ;
    資訊工程學系
    ;
    Department of Computer Science
    Differentiated services: (Diffserv) model is one of the possible solutions for providing quality of service (QoS) on the Internet. Most existing approaches assume that the packet loss is an indication of network congestion and thus reduce the sending rates: of sources. For wireless networks, the assumption is not proper since packet losses may he caused by other reasons, such as fading and interference of the signal. Therefore, these approaches do not work well in wireless networks. In this paper, we propose an approach which is able to provide service differentiation in wireless environments. In our approach, the rate share of a connection is determined by the associated weight. By keeping a proper amount of extra data in the network, the proposed approach can achieve weighted proportional fairness, which can provide selective QoS without any particular support, from the network. We use the ns simulator to evaluate our approach. Simulation results show the validity of the proposed approach.
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    A scalable architecture for differentiated services
    (2002)
    Lee, CL
    ;
    Chen, JR
    ;
    Chen, YC
    ;
    交大名義發表
    ;
    National Chiao Tung University
    Differentiated services (DiffServ) model is a potential solution for providing quality of services (QoS) on the Internet. In this paper, we propose a scalable architecture that fulfills the design philosophy of the DiffServ model. Different from other existing architectures, our proposed architecture puts complexity on edge routers so that core routers do not need to support any specific function for service differentiation. Further, the proposed architecture only needs few additional functions in edge routers. Thus its deployment is simpler than most existing architectures. We also address how to achieve weighted proportional fairness solely by edge routers.