Fiber to the Home/Fiber to the Premises: What, Where, and When?

Koonen, Ton

doi:10.1109/jproc.2006.873435

Cited by 270 publications

(115 citation statements)

References 14 publications

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“…They both have antithetical advantages and disadvantages based on their respective topologies. For example, SS-type systems have the advantages that they can provide dedicated access lines to subscribers, they are transparent between the OLT and ONUs, and they can reliably and safely provide or upgrade different services separately (they have excellent expandability) [16], [17]. Although the high cost of providing the current 100 Mbps-grade services has been pointed out, once the fiber infrastructure is installed, upgrade costs are limited to only costs for individual ONUs and associated OLTs, and migration is easy.…”

Section: Current Ftthmentioning

confidence: 99%

Optical Access Architecture Designs Based on WDM-Direct toward New Generation Networks

Miyazawa

Harai

2010

IEICE Trans. Commun.

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SUMMARYWe present our proposed designs of optical access architecture based on WDM technology toward new-generation networks for two types of topologies: Single-star (SS) and passive-double-star (PDS). We adopt the concept of WDM-direct which links multiple wavelengths to each optical network unit (ONU). Our proposed architecture based on WDM-direct can achieve more than 10 Gbps access per ONU. Moreover, our architecture can provide not only conventional bandwidth-shared services but also bandwidth-guaranteed services requiring more than 10 Gbps bandwidth by establishing end-to-end lightpaths directly to each ONU, and thus meet high requirements of QoS in new-generation networks. Firstly, we show our proposed designs of SS-type architecture, and experimentally demonstrate the system. We confirm that the optical line terminal (OLT) successfully switches between packet/lightpath data transmissions for each ONU. In addition, we measure and evaluate optical power loss in upstream/downstream transmissions between the OLT and ONUs. Secondly, we show our proposed designs of PDS-type architecture, and theoretically analyze and evaluate the bit-rate capacity of the system.

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Section: Current Ftthmentioning

confidence: 99%

Optical Access Architecture Designs Based on WDM-Direct toward New Generation Networks

Miyazawa

Harai

2010

IEICE Trans. Commun.

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“…The three architectures are point to point architecture, active star architecture and passive star architecture [4] . Fig.…”

Section: Non Secured Pon Architecturesmentioning

confidence: 99%

Protection for an Immediate Split Structure of Tree-Based EPON Architecture-Ideal Condition Analysis

Ab-Rahman¹,

Aziz²,

Jumari³

2009

American J. of Engineering and Applied Sciences

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Problem statement: Ethernet Passive Optical Network (EPON) was proposed to overcome the bandwidth bottleneck at the Access Networks due to its simplicity, cost effective and wide spread deployment. A failure in access networks can cause serious problems, because access network transmit aggregated high speed traffic from hundreds of subscribers. Protection and restoration mechanisms have been applied in backbone networks, but access networks are not considered significantly in the scope of survivability. Approach: In this study, we proposed a cost effective protection scheme for a novel tree-based EPON architecture. Immediate Split Structure (ISS) means the signal was totally split after pass through the first optical splitter. This was the second proposal method after first suggestion using Optical Cross Add and Drop Multiplexer (OXADM) as a restoration switch. In this study we used only 2 × 2 and 2 × 1 optical switches combination to divert the traffic to the alternative path. Three faulty conditions were considered in this research and OptiSystem, Inc software was used to prove the solution feasibility. Results: The Bit Error Rate (BER) performances were measured by a 1.25 Gb sec −1 Non-Return-to-Zero (NRZ) pseudo random binary sequence (PRBS) with a pattern length of 2 31-1 for the downstream traffic between the OLT and 8 ONUs. Our results were obtained by observing bit error rates, eye diagrams and optical power levels in ideal condition. Conclusion: The survivability of EPON is necessary to provide seamless services and ensure network reliability. Single failure in the line connected will activate dedicated protection while shared protection was activated when both fiber (working and standby fiber) are breakdown. We analyzed the system in ideal condition to prove the system feasibility.

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“…Recent predictions, however, assume the introduction of 1 Gbit/s per user already within a decade [see Table I] 8 . In this case, at the nodes of the access networks data in the Tbit/s range would have to be routed 9 . Currently available electronic equipment is far from being able to handle such high bitrates.…”

Section: Technical Aspects Of Ultrafast Communicationmentioning

confidence: 99%

Ethical Aspects of Research in Ultrafast Communication

Driessen

2009

The International Library of Ethics, Law and Technology

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This chapter summarizes the reflections of a scientist active in optical communication about the need of ethical considerations in technological research. An optimistic definition of ethics, being the art to make good use of technology, is proposed that emphasizes the necessarily involvement of not only technologists but also experts in humanity. The paper then reviews briefly the research activities of a Dutch national consortium where the author had been involved. This mainly academic research dealt with advanced approaches for ultrafast communication. In the next section an assessment is given of the potential impact of the technological results on society. In order to emphasize the positive aspects and counteract the negative ones, three steps are proposed: (i) create conditions for a dialogue between experts in ethics and technology; (ii) work out scenarios for the introduction of new techniques in society; (iii) anticipate opportunities and threats. Finally the conclusions are presented.

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Fiber to the Home/Fiber to the Premises: What, Where, and When?

Cited by 270 publications

References 14 publications

Optical Access Architecture Designs Based on WDM-Direct toward New Generation Networks

Optical Access Architecture Designs Based on WDM-Direct toward New Generation Networks

Protection for an Immediate Split Structure of Tree-Based EPON Architecture-Ideal Condition Analysis

Ethical Aspects of Research in Ultrafast Communication

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