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Characteristics and Methods of Bandwidth Allocation According to Flow Features for QoS Control on Flow-Aware Network  

Kim, Jae-Hong (School of Electronic and Information Engineering Hankuk University of Foreign Studies)
Han, Chi-Moon (School of Electronic and Information Engineering Hankuk University of Foreign Studies)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.45, no.9, 2008 , pp. 39-48 More about this Journal
Abstract
Recently, many multimedia services have emerged in Internet such as real-time and non- real time services. However, in this Internet environment, we have some limitations to satisfy each service feature. To guarantee the service features in Measurement-Based Admission Control(MBAC) based system on the flow-aware network, there is the method applying Dynamic Priority Scheduling(DPS) algorithm that gives a higher priority to an earlier incoming flow in all of the link bandwidth. This paper classifies all flows under several groups according to flow characteristics on per-flow MBAC algorithm based system. In each flow group, DPS algorithm is applied. This paper proposes two methods that are a DPS based bandwidth borrowing method and a bandwidth dynamic allocation method. The former is that if low priority class has available bandwidths, the flow of high priority class borrows the bandwidth of low priority class when high priority flow has insufficient bandwidth to connect a flow call. The later is that the each group has a minimum bandwidth and is allocated the bandwidth dynamically according to the excess rate for available bandwidth. We compare and analyze the characteristics of the two proposed methods through the simulation experiments. As the results of the experiment, the proposed methods are more effective than existing DPS based method on the packet loss and delay characteristics. Consequently the proposed two methods are very useful in various multimedia network environments.
Keywords
Flow-Aware Network; MBAC; QoS Control; DPS; Bandwidth Allocation Algorithm; CAC;
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