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This paper points out the benefit and scope of circuit switching in the future optical Internet. Given the increasingly excessive energy consumption by IP-based Internet routers which may lead to a constraint on Internet growth, the profile of Internet traffic and the high utilization achievable by dense wavelength division multiplexing, a conclusion can be made that efficient design of telecommunications...
In current optical switches, an entire wavelength is switched from a source node to a single destination node, thereby precluding fractional wavelength allocation. This limitation results in two major problems: (i) N(N-1) wavelengths are required to fully connect a network with N edge nodes; and (ii) traffic arriving at the core switch from multiple optical links cannot be groomed in the optical domain...
Today Energy Consumption is one of the fundamental topics also for telecommunication networks. In this paper, we report a numerical investigation about energy saving in a transport network both exploiting the transmission properties that permit to reduce 3R equipments and reducing optical links during low traffic periods.
To cope with increasing traffic, optical networks have steadily adopted faster interfaces. Interfaces working at 40 Gb/s were recently introduced in networks already deployed at 10 Gb/s; moreover, 100 Gb/s interfaces have been demonstrated in laboratory experiments. As this upgrade in bit-rate tends to evolve over time scales faster than the lifetime of deployed systems, wavelength division multiplexed...
This paper outlines the market for transparent optical networks and how these have developed, from their simple origins of saving the costs of OEO regeneration in point-to-point WDM links, to today's ring and mesh networks with flexible/reconfigurable nodal traffic access, using multi-way ROADM's. The paper then reviews and compares the technology options for multi-way ROADM's and the impact that...
In this paper we present a new optical networking platform called optical packet switch and transport or OPST. We present some techno-economic modelling results that show how OPST can reduce the total cost of ownership (TCO) of a Metro Network by up to 50%, it can reduce the power consumption by up to 75%, and space requirements are reduced by up to 50%. OPST outperforms existing equipment by having...
The efficient accommodation of sub-wavelength client flows on optical channels is a current challenge for resources use optimization in GMPLS controlled optical networks. While optical channels capacity usually exceeds 10 Gbit/s, client connections requests show finer granularity. This paper concentrates on the design and implementation of a GMPLS-controlled grooming capable transport infrastructure...
Recently, 160 to 640 Gbit/s/port colored optical packet switch prototypes are demonstrated. Arrayed burst-mode Tx./Rx., all-optical multiple label processor, high-speed polarization independent optical switch, optical buffer with FDL, parallel and pipelined buffer manager, and burst-mode EDFA are introduced as key technologies. Effects of polarization rotation due to the field transmission on the...
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