NDLI: A novel decentralized ethernet-based PON access architecture for provisioning differentiated QoS

Content Provider	IEEE Xplore Digital Library
Author	Sherif, S.R. Hadjiantonis, A. Ellinas, G. Assi, C. Ali, M.A.
Copyright Year	1983
Abstract	To date, the mainstream ethernet passive optical network (EPON) bandwidth allocation schemes as well as the new IEEE 802.3ah Ethernet in the first mile Task Force specifications have been centralized, relying on a component in the central office [optical line termination (OLT)] to provision upstream traffic. Hence, the OLT is the only device that can arbitrate time-division access to the shared channel. Since the OLT has global knowledge of the state of the entire network, this is a centralized control plane in which the OLT has centralized intelligence. This paper proposes novel distributed EPON architectures, and in the process proves that these distributed networking architectures and the associated bandwidth allocation algorithms and protocols have characteristics that make them far better suited for provisioning quality of service (QoS) schemes necessary for properly handling data, voice, video, and other real-time streaming advanced multimedia services over a single line. Specifically, this paper proposes a novel ethernet over star coupler-based PON architecture that uses a fully distributed time-division multiple-access (TDMA) arbitration scheme. Supported by the decentralized scheme, this paper proposes several QoS-based dynamic bandwidth allocation (DBA) algorithms in which the OLT is excluded from the implementation of the time slot assignment. In contrast with the mainstream centralized EPON architectures that combine priority queuing [intra-optical network unit (ONU) scheduling] with DBA schemes (inter-ONU scheduling), the proposed distributed EPON architecture supports differentiated services through the integration of both scheduling mechanisms at the ONU (intra-ONU scheduling). The introduction of this integration feature that can only be supported by a decentralized architecture provides better QoS guarantees. Furthermore, in addition to the added flexibility and reliability, the overall performance of the proposed decentralized EPON architecture and the associated bandwidth allocation algorithms are shown to be at least as efficient as their centralized counterparts.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2483
Ending Page	2497
Page Count	15
File Size	1125050
File Format	PDF
ISSN	07338724
Volume Number	22
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Passive optical networks EPON Quality of service Channel allocation Optical network units Ethernet networks Streaming media Central office Optical devices Optical fiber networks simulation Dynamic bandwidth allocation (DBA) Ethernet-based passive optical network (EPON) fiber-to-the-home (FTTH) modeling quality of service (QoS) scheduling
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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