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The continued increase in Internet traffic, particularly in metro networks, is spurring wide deployment of optical networking technologies for wavelength routing. In metro networks, the number of nodes traversed can be very large and hence the optical filtering penalty incurred in the ROADM/OXC nodes can be critical as it degrades fiber frequency utilization. This presentation elucidates how grouped...
The development of OXCs/ROADMs has so far mainly focused on the number of input/output fibers to/from optical nodes. This presentation will clarify the implications of node/fiber/WSS degree on OXC/ROADM performance. We show how to create very large-scale and cost-effective OXCs/ROADMs by exploiting current technologies.
To offset the impairment caused by imperfect optical filtering at ROADMs/OXCs, guard bands must be inserted between optical channels. The resulting degradation in frequency utilization detracts from the benefit of next-generation elastic optical path networks. To overcome this problem and achieve an ICT infrastructure with the required level of resiliency, we add path-granularity-level shared protection...
The future transport bottleneck lies in the transport node systems and hence node technology needs to be advanced. The situation will be more prominent in metro than core networks, since the former has the greater traffic increase. Optical nodes for metro networks have different requirements from those of core networks. This presentation investigates them and summarizes recent technology advances...
Future optical networks need flexible and large-scale optical cross-connect systems that can support the ever-increasing Internet traffic and advanced wavelength services. Recent advances in system development and the challenges tackled are presented.
Power reduction and throughput enhancement are critical issues in core/metro networks. Recent advances in and the future roles of electrical and optical transport technologies are discussed. Exploiting optical technologies is the best way of achieving the above goals. Important optical technologies that need to be developed are discussed; they include agility and elasticity of optical paths and large...
Optical routing technologies will surely be the key to creating future bandwidth abundant and green networks. Considering future services and the need to create virtual fiber networks, the introduction of wavebands is a next important step.
This paper discusses the prospects of and challenges facing the next generation transport network architectures. Enhancements expected in optical path technologies are highlighted and state-of-the-art key enabling technologies are demonstrated.
This paper investigates the impact of waveband capacity on the cost of hierarchical optical path networks with waveband and wavelength path protection. Numerical experiments demonstrate the importance of waveband capacity optimization.
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