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Competitive queuing policies for pac...

Columbia University.

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Competitive queuing policies for packet scheduling.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Competitive queuing policies for packet scheduling./
作者:	Li, Fei.
面頁冊數:	80 p.
附註:	Advisers: Clifford Stein; Jay Sethuraman.
Contained By:	Dissertation Abstracts International68-11B.
標題:	Computer Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3292141
ISBN:	9780549350286

Competitive queuing policies for packet scheduling.
Li, Fei.

Competitive queuing policies for packet scheduling. - 80 p.

Advisers: Clifford Stein; Jay Sethuraman.

Thesis (Ph.D.)--Columbia University, 2008.

In the Internet, all information is aggregated into packets. The computers connected to the Internet communicate with each other by means of exchanging packets. All packets travel through communication links and network switches. If a burst of packets arrives at the same time, a network switch cannot transmit all of them on the fly. Inside a network switch, there are some output buffer(s). Arriving packets are queued in the output buffer(s), waiting to be delivered.

ISBN: 9780549350286Subjects--Topical Terms:

626642
Computer Science.

Competitive queuing policies for packet scheduling.
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502 $a Thesis (Ph.D.)--Columbia University, 2008.
520 $a In the Internet, all information is aggregated into packets. The computers connected to the Internet communicate with each other by means of exchanging packets. All packets travel through communication links and network switches. If a burst of packets arrives at the same time, a network switch cannot transmit all of them on the fly. Inside a network switch, there are some output buffer(s). Arriving packets are queued in the output buffer(s), waiting to be delivered.
520 $a Most current Internet switches adopt the First-In-First-Out (FIFO) buffering policy. Using the FIFO buffering policy, network switches send packets in the same order as they arrive. FIFO buffering policy cannot provide assured data transmission for time-critical applications or mission-critical applications due to unpredictable packet loss, end-to-end delay, out-of-order delivery, and jitter.
520 $a In the past ten years, there is rapid growth of network traffic and time-critical applications. The diversity of applications results in unpredictable packet flows and heterogeneous network traffic, and motivates us to study buffer management at the switch levels for providing better Quality of Service (QoS). The difficulty of achieving better QoS in the existing Internet infrastructure without sacrificing high resource utilization remains open.
520 $a In this thesis, we study a model in the Differentiated Services (DiffServ) QoS infrastructure, which is called the "bounded-delay model". We characterize packets by their deadlines by which they should be sent, and their payoffs when they are delivered on time. Our goal is to maximize the total value of packets sent by their deadlines. We design deterministic online packet scheduling algorithms for QoS queuing policies. We also develop novel and effective analysis techniques. Our algorithms perform better over existing solutions in terms of competitive ratio, which provides a worst-case performance guarantee for all traffic patterns. The ideas and approaches developed in this thesis explore the insights in similar online models with deadline constraints, and can be generalized and applied to other online scheduling problems.
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