E. Le Rouzic

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We tackle the problem of reducing power consumption in IP-over-WDM networks, targeting the power-aware logical topology design (LTD). Unlike the previous work in the literature, our solution reduces the power consumption with consideration of the cost (in terms of reconfigured traffic) incurred when the network is reconfigured. We first formulate the LTD(More)
—In this paper, quality of transmission (QoT)-aware lightpath provisioning schemes for transparent optical networks are proposed and assessed. The main idea is to overcome lightpath blocking due to excessive physical impairments (i.e., unacceptable QoT) by means of successive lightpath set up attempts performed by generalized multiprotocol label switching(More)
Transparent optical mesh networks are an appealing solution to provide cost-effective high bandwidth connections eliminating the need of expensive intermediate electronic regenerators. However, the implementation of transparent optical networks requires to take into account physical impairment information for effective lightpath setup. In this paper, we(More)
Nowadays, impairment-aware connection provisioning is a hot topic due to the evolution of optical networks to all-optical infrastructures and to the need to maintain or enhance Quality of Service (QoS). Most of the research efforts in this field use complex, analytical models of impairments as the basis for the connection provisioning decision. However,(More)
We propose an all-optical networking solution for a wide area network built on shared multipoint-to-multipoint lightpaths that, for short, we call "multipaths." A multipath concentrates the traffic of a group of source nodes on a wavelength channel using an adapted medium access control protocol and multicasts this traffic to a group of destination nodes(More)
The paper studies the impact of ultra long haul WDM transmission systems and traffic volume on the cost of translucent (or hybrid) optical transport networks. The cost of translucent networks is evaluated as a function of the reach of WDM systems using the prices of commercially available network elements and is compared with the cost of the corresponding(More)
New time-slotted subwavelength switching paradigms have been proposed as promising solutions to exploit the subwavelength bandwidth overcoming many limitations of traditional optical burst switching (OBS) schemes. Since these new paradigms are based on fix-sized bursts transmitted during time slots, the efficient assembly of IP packets into optical bursts(More)
We propose an all-optical networking solution for an Internet core network based on the notion of multipoint-to-multipoint lightpaths that, for short, we call multipaths. The multipath MAC protocol concentrates the traffic of a cluster of source nodes on a wavelength channel and multicasts this traffic to a cluster of destination nodes. The proposed network(More)
With the continuing growth of traffic, improving the flexibility and the transparency of optical networks are very important challenges that operators have to face. In this paper, we present a networking technique based on optical multi-band Orthogonal Frequency Division Multiplexing. The optical multi-band OFDM approach enables optical switching at fine(More)
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