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1

Design and development of a new architecture of sliceable bandwidth variable transponder

Ujjwal T., Jaisingh T.

Opto-Electronics Review

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2017

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Vol. 25, No. 1

46--53

EN

In this paper we propose a new sliceable bandwidth variable transponder (SBVT) architecture with the separate analysis on the transmitter and receiver section. In transmission section we propose a distance module (DM) which is a programmable module. It divides a data stream/main stream (which employs a super-channel) into sub-stream and assigned modulation technique to each sub-stream based on their light path distance detailing the concept of sub-channel. In this paper, we have also proposed an algorithm for the distance module. Next we propose a modulation and transmission module (M&TM), where, planar light wave circuit (PLC) is used for enabling three modulation techniques (PM-16QAM, PM-QPSK and PM-BPSK). Finally, we propose the receiving section, which is designed to support three modulation techniques. It consists of two demodulator circuits, one for PM-16QAM/PM-QPSK and the other for PM-BPSK. In this proposed work, we focus on the multi-mode interference (MMI) devices (MMI coupler and MMI splitter) because of their photonic integration technology which is necessary for the implementation of SBVT. Lastly, we propose an elastic optical node architecture which removes the limitations of previously discussed node architecture for long distance communication.

2

Developing a Ring-Based Optical Network Structure with Glass-Through Nodes

Caserta M., Schwarze S., Voß S.

Journal of Telecommunications and Information Technology

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2012

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nr 2

13-20

EN

An important issue in designing optical transport networks (OTN) is security. The concept of 1+1 protection requires to connect each origin-destination(OD)-pair by at least two node-disjoint paths. In the case of a single edge or node failure, the connection of all OD-pairs is maintained under 1+1 protection. On a ring, 1+1 protection is given naturally. Moreover, on rings, the routing effort is typically decreasing. These observations motivate the investigation of ring structures for OTN. When developing a ring structure for telecommunication networks, several subtasks can be identified. Ringshave to be designed, OD-pairs have to be assigned to rings, communication among rings has to be defined, a proper flow routing has to be chosen, and rings have to be dimensioned regarding flow capacity. In this paper, we address the first two issues, namely generation of rings and assignment of OD-pairs to rings. Our approach allows to distinguish active and non-active (glass-through) nodes in OTN. Active nodes are equipped with active routing hardware that weakens the optical signal and has impact on feasible ring lengths. Non-active nodes do not influence the optical signal. Although a consideration of active/non-active nodes is important in ring design, only a few references address this issue. We propose an algorithm for generating random ring candidates. Moreover, we present a mathematical model for the assignment of OD-pairs to rings subject to a feasible choice of active nodes. We test our methods using a case of Deutsche Telekom.

3

Konsolidacja ruchu w optycznych sieciach transportowych

Jajszczyk A., Lasoń A., Rząsa J., Szymański A.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2005

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nr 7

239-244

PL

Przedstawiono problem konsolidacji ruchu w wielowarstwowych, optycznych sieciach transportowych. Omówiono możliwe sposoby ich adaptacji do zmieniających się wymagań oraz wskazano potencjalny wpływ zmian architektur sieciowych na problem konsolidacji ruchu. Przedstawiono definicję problemu sterowania ruchem w wielowarstwowychsieciach telekomunikacyjnych oraz dokonano klasyfikacji algorytmów konsolidacji ruchu.

EN

In the paper, the traffic grooming problem is presented. Moreover, a short description of possible adaptation scenarios for contemporary optical transport networks is provided. The influence of the network adaptation on the traffic grooming problem is discussed. The definition as well as classification of the traffic grooming algorithms are shown.

4

Mikrozwierciadła krzemowe w sieciach optycznych, modelowanie mikrozwierciadeł krzemowych

Zieliński M.

Mikroelektronika i Informatyka : prace naukowe

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2004

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Z. nr 4

245-250

5

Sieć z komutacją pakietów w warstwie optycznej

Sadowski J.

Telekomunikacja i Techniki Informacyjne

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2002

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nr 1-2

41-58

PL

Scharakteryzowano specyficzne właściwości ruchu typowego dla sieci Internet i architekturę przyszłych optycznych sieci transportowych. Przedstawiono korzyści, wynikające z zastosowania komutacji w warstwie optycznej. Ponadto zaprezentowano koncepcję optycznej transparentnej sieci pakietowej oraz sieci optycznej, wykorzystującej technikę etykietowanej grupowej komutacji pakietów optycznych LOBS.

EN

The article presents specific characteristics of Internet traffic and the architecture of the future optical transport networks resulting from it. Also the advantages of using the optical packet switching technology are shown. Moreover, the optical transparent packet network paradigm and the labeled optical burst switching paradigm are presented.