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Efficient and fine scheduling algorithm for bandwidth allocation in Ethernet passive optical networks
Centre for Optical and Electromagnetic Research, Joint Laboratory of Optical Communications, Zhejiang University, Hangzhou 310027, China.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Fotonik och optik (Stängd 20120101), Fotonik (Stängd 20120101). (NEGONET)
KTH, Skolan för elektro- och systemteknik (EES), Centra, Alfvénlaboratoriet.ORCID-id: 0000-0002-3401-1125
2006 (Engelska)Ingår i: IEEE Journal of Selected Topics in Quantum Electronics, ISSN 1077-260X, E-ISSN 1558-4542, Vol. 12, nr 4, s. 653-660Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A novel fine scheduling algorithm is introduced for upstream bandwidth allocation in an Ethernet-based passive optical network. This scheduling algorithm consists of an inter optical network unit (ONU) scheduler at the optical line terminal (OLT) and an intra-ONU scheduler at each ONU. In the inter-ONU scheduling, a novel GATE/REPORT approach is introduced to eliminate the unused remainders without transmission delay and maximize the utilization of bandwidth. Our novel intra-ONU scheduler gives fair bandwidth allocation to the queues of different priorities for each user in a hierarchical and decentralized way. Numerical results have shown that our overall scheduling algorithm can fulfill various requirements of delay and throughput for the transmission of multimedia traffic for each end user..

Ort, förlag, år, upplaga, sidor
2006. Vol. 12, nr 4, s. 653-660
Nyckelord [en]
dynamic bandwidth allocation, Ethernet passive optical network (EPON), hierarchical scheduling, optical access technologies, unused remainder, ACCESS NETWORK, SERVICE, EPON, PONS
Nationell ämneskategori
Telekommunikation
Identifikatorer
URN: urn:nbn:se:kth:diva-14007DOI: 10.1109/JSTQE.2006.876607ISI: 000239745000021Scopus ID: 2-s2.0-33747242027OAI: oai:DiVA.org:kth-14007DiVA, id: diva2:329074
Anmärkning

QC 20100707

Tillgänglig från: 2010-07-07 Skapad: 2010-07-07 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
Ingår i avhandling
1. Design, analysis and simultion for optical access and wide-area networks.
Öppna denna publikation i ny flik eller fönster >>Design, analysis and simultion for optical access and wide-area networks.
2009 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Due to the tremendous growth of traffic volume caused by both exponential increase of number of Internet users and continual emergence of new bandwidth demanding applications, high capacity networks are required in order to satisfactorily handle the extremely large amount of traffic. Hence, optical fiber communication is the key technology for the network infrastructure. This thesis addresses design, analysis and simulation of access and core networks targeting important research problems, which need to be tackled for the effective realization of next generation optical networks.

Among different fiber access architectures, passive optical network (PON) is considered as the most promising alternative for the last mile connection due to its relatively low cost and resource efficiency. The inherent bursty nature of the user generated traffic results in dynamically changing bandwidth demand on per subscriber basis. In addition, access networks are required to support differentiated quality of service and accommodate multiple service providers. To address these problems we proposed three novel scheduling algorithms to efficiently realize dynamic bandwidth allocation in PON, along with guaranteeing both the priority and fairness of the differentiated services among multiple users and/or service providers. Meanwhile, because of the increasing significance of reliable access to network services, an efficient fault management mechanism needs to be provided in PON. In addition, access networks are very cost sensitive and the cost of protection should be kept as low as possible. Therefore, we proposed three novel cost-effective protection architectures keeping in mind that reliability requirement in access networks should be satisfied at the minimal cost.

Regarding the optical core networks, replacing electronic routers with all-optical switching nodes can offer significant advantages in realizing high capacity networks. Because of the technological limitations for realizing all-optical nodes, the focus is put on the ingenious architecture design. Therefore, we contributed on novel switching node architectures for optical circuit and packet switching networks. Furthermore, we addressed different aspects of routing and wavelength assignment (RWA) problem, which is an important and hard task to be solved in wavelength routed networks. First, we proposed an approach based on the information summary protocol to reduce the large amount of control overhead needed for dissemination of the link state information in the case of adaptive routing. In addition, transparency in optical networks may cause vulnerability to physical layer attacks. To target this critical security related issue, we proposed an RWA solution to minimize the possible reachability of a jamming attack.

Finally, in order to evaluate our ideas we developed two tailor-made simulators based on discrete event driven system for the detailed studies of PON and switched optical networks. Moreover, the proposed tabu search heuristic for our RWA solution was implemented in C++.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2009. s. 86
Serie
Trita-ICT/MAP ; 1653-7610
Nyckelord
fiber access networks, passive optical network, dynamic bandwidth allocation, reliability, switched optical networks, switching node, optical circuit switching, optical packet switching, routing and wavelength assignment, security
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:kth:diva-10348 (URN)
Disputation
2009-05-08, Sal C1, KTH-Electrum, Isafjordsgatan 22, Kista, Stockholm, Sal C1, KTH-Electrum, Isafjordsgatan 22, Kista, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning
QC 20100707Tillgänglig från: 2009-05-08 Skapad: 2009-05-07 Senast uppdaterad: 2010-07-08Bibliografiskt granskad

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Chen, JiajiaHe, Sailing
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Totalt: 491 träffar
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