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Performance analysis of a proposed hybrid optical network

Liamcharoen, Natthapong (2016) Performance analysis of a proposed hybrid optical network. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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This dissertation discusses a novel Hybrid Optical Network (HON) that can provide service differentiation based on traffic characteristics (i.e., packet, burst, and long-lived flow) with QoS guarantee not only in network layer, but also in physical layer. The DHON consists of sophisticated edge-nodes, which can classify, monitor, and dynamically adjust optical channels in the core layer as traffic variation. The edge nodes aggregate traffic, identifying end-to-end delay by ingress queuing delay or burst timeout. The network can estimate number of channels by arriving traffic intensity and distribution with estimated upper-bound delay. The core layer employs two parallel optical switches (OCS, OBS) in the same platform. Thanks to the overflow system, the proposed network enhances utilization with fewer long distance premium channels. The premium channel can quickly handle burst traffic without new channel assignment. With less overprovisioning capacity design, the premium channel enhances utilization and decrease number of costly premium channels. This research also proposes mathematic models to represent particular DHON channels (i.e., circuit, packet, and burst). We employ method of moments based on overflow theory to forecast irregular traffic pattern from circuit-based channel (i.e., M/M/c/c) to overflow channel, in which G/G/1 model based on Ph/Ph/1 matrix can represent the overflow channel. Moreover, secondary channel supports packet-based traffic over wavelength channel with two service classes: Class I based on delay sensitive traffic (i.e., long flow) and Class II for non-delay sensitive traffic (e.g., best effort). In addition, mixture of traffic in the wavelength channels is investigated based on M/G/1 and M/G/2 with specific service time distribution for particular class. Finally, we show our DHON based on (O-O-O) switching paradigm has improved the performance over typical (O-E-O) switching network architecture based on NSF topology.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Liamcharoen, Natthapongnal14@pitt.eduNAL14
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorThompson, Richardratpitt@gmail.comRAT
Committee MemberTipper, Davidtipper@tele.pitt.eduTIPPER
Committee MemberWeiss, Martinmbw@pitt.eduMBW
Committee MemberKrishnamurthy, Prashantprashk@pitt.eduPRASHK
Committee MemberQiao,
Date: 30 September 2016
Date Type: Publication
Defense Date: April 2015
Approval Date: 30 September 2016
Submission Date: 29 July 2016
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 173
Institution: University of Pittsburgh
Schools and Programs: School of Information Sciences > Telecommunications
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: "hybrid optical network", "performance analysis", overflow, "QoS in optical network"
Date Deposited: 30 Sep 2016 15:11
Last Modified: 15 Nov 2016 14:35


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