NDLI: Fault-tolerable and SLA-supportive architecture for TWDM-PON systems

Content Provider	Springer Nature Link
Author	Rawshan, Fahmida Park, Youngil
Copyright Year	2015
Abstract	In this paper, a protection architecture that can be applied to NG-PON2 system, or TWDM-PON, is proposed. NG-PON2 system provides bandwidth as much as 80 Gbps in downstream, and the system failure may cause a serious problem. Therefore, its protection becomes more important issue. We solved this problem by making a pair of OLTs protect with each other. If one OLT is out of order, the protection OLT provides service to two ONU groups in the proposed scheme. For this purpose, each OLT is equipped with two downstream wavelengths: one for itself and the other for the protection. It enhances the reliability of PON systems, which is essential for business application. Since the next generation PON system accommodates many types of users, its service level must be differentiated and this property should be maintained even during a protection mode. To meet this condition, we introduce a bandwidth management scheme to ensure the QoS of each ONU and to maximize the total transmission efficiency at the same time. A shared bandwidth allocation is used for this purpose, and it is compared with exclusive bandwidth allocation scheme. Performance of the proposed systems is studied through extensive analysis.
Starting Page	143
Ending Page	149
Page Count	7
File Format	PDF
ISSN	1387974X
Journal	Photonic Network Communications
Volume Number	30
Issue Number	2
e-ISSN	15728188
Language	English
Publisher	Springer US
Publisher Date	2015-04-03
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Passive optical network (PON) TWDM-PON Exclusive bandwidth allocation Shared bandwidth allocation QoS Service level agreement (SLA) Self-similar traffic Computer Communication Networks Electrical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Computer Networks and Communications Electrical and Electronic Engineering Hardware and Architecture Software

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