Scott Seongwook Lee

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The paper presents approaches for fault tolerance and load balancing in QoS provisioning using multiple alternate paths. The proposed multiple QoS path computation algorithm searches for maximally disjoint (i.e., minimally overlapped) multiple paths such that the impact of link/node failures becomes signiicantly reduced, and the use of multiple paths(More)
— Today's emerging traffic is far removed from the traffic trends seen during the early days of Ethernet technology. As a result, the current IEEE 802.1 standards and its extensions to the Spanning Tree protocol fall short of providing satisfactory quality of service for traffic which has a significant amount of QoS-sensitive multimedia and VOIP traffic. In(More)
— In this paper, we propose the use of QoS routing to enhance the support of IP Telephony. Our proposed scheme is based on QoS intradomain OSPF routing, an extension of the conventional OSPF routing protocol. A DiffServ model is used (no per flow signaling, nor per flow accounting at intermediate nodes). Processing O/H is shifted from core to edge routers,(More)
In order to provide practical QoS services, we propose a new traffic engineering approach for low-cost and fast QoS provisioning. The new scheme utilizes network resources more evenly by exercising an enhanced QoS path computation algorithm that finds maximally disjoint multiple QoS paths. An efficient mechanism for managing computed paths and allocating(More)
Efforts to provide connection oriented service over the inherently best-effort Internet started almost right after its birth. Today, there exist a multitude of solutions that have been proposed but have never been implemented due to their impracticability. We propose a practical solution for fast, low cost, scalable, and yet accurate QoS routing. We propose(More)
In this paper, we present an 'emulation environment' for the design and planning of QoS-enabled IP networks. Specifically, QoS support for real-time traffic in future IP networks require 'fault tolerance' for mission-critical applications such as tele-medicine. Based on this premise, our goal is to design the QoS network system for the traffic management so(More)
In this paper, we introduce a practical network management system with QoS for multimedia traffic. Today, multimedia applications have evolved significantly and have become an essential part of the Inter-net. In order to effectively support the newly emerging network traffic, the underlying network protocols need to be aware of the characteristics and(More)
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