Change search
ReferencesLink to record
Permanent link

Direct link
High utilization of wavelengths and simple interconnection between users in a protection scheme for passive optical networks
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Photonics.
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Photonics.ORCID iD: 0000-0001-6704-6554
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
2008 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 20, no 5-8, 389-391 p.Article in journal (Refereed) Published
Abstract [en]

A novel protection architecture for passive optical networks (PONs) is presented and evaluated. It is based on the cyclic property of arrayed waveguide gratings (AWGs) and the interconnection between two adjacent optical network units. The proposed scheme is compatible with both wavelength-division-multiplexing (WDM) PONs and hybrid WDM/time-division-multiplexing PONs. It is compared with two existing schemes and shown to have several advantages: 1) 50% less wavelengths is needed; 2) the fiber interconnections are simplified; 3) the connection availability is improved by one order of magnitude.

Place, publisher, year, edition, pages
2008. Vol. 20, no 5-8, 389-391 p.
Keyword [en]
hybrid wavelength-division-multiplexing/time-division-multiplexing (WDM/TDM) passive optical network (PON), protection, wavelength-division-multiplexing (WDM), passive optical network (PON)
National Category
URN: urn:nbn:se:kth:diva-14011DOI: 10.1109/LPT.2007.915655ISI: 000257952800021ScopusID: 2-s2.0-40749096828OAI: diva2:329091
QC 20100707Available from: 2010-07-07 Created: 2010-07-07 Last updated: 2013-11-19Bibliographically approved
In thesis
1. Design, analysis and simultion for optical access and wide-area networks.
Open this publication in new window or tab >>Design, analysis and simultion for optical access and wide-area networks.
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
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++.

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. 86 p.
Trita-ICT/MAP, 1653-7610
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
National Category
urn:nbn:se:kth:diva-10348 (URN)
Public defence
2009-05-08, Sal C1, KTH-Electrum, Isafjordsgatan 22, Kista, Stockholm, Sal C1, KTH-Electrum, Isafjordsgatan 22, Kista, Stockholm, 10:00 (English)
QC 20100707Available from: 2009-05-08 Created: 2009-05-07 Last updated: 2010-07-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Chen, JiajiaWosinska, LenaHe, Sailing
By organisation
PhotonicsElectromagnetic Engineering
In the same journal
IEEE Photonics Technology Letters

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 60 hits
ReferencesLink to record
Permanent link

Direct link