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In this paper, we assess a new technology, WDM Slotted Add/Drop Multiplexer (WSADM) which has been proposed as a new transport network technology based on sub-wavelength switching. This solution is envisaged to be deployed in the metropolitan area in order to improve bandwidth utilisation and minimise the overall cost of the network. In order to assess the relative cost of WSADM, we compare it, on...
In this paper we assess the performance delivered in a metro network by two optical packet switching architectures, enabling sub-wavelength switching granularity. We compare POADM (Packet Optical Add/Drop Multiplexer) with TWIN (Time-domain Wavelength Interleaved Network). These technologies are envisaged to be deployed in the metropolitan area in order to improve bandwidth utilization and minimize...
Abstract—In this paper, we study several alternatives of protection for a time-domain wavelength interleaved network (TWIN), an optical burst switching technology for transport networks with active edge nodes, passive core nodes, and time-slotted operation. The main difference between those alternatives concerns the degree of resource sharing (transmitters, receivers, and wavelengths). After an extended...
The continuous growth of the traffic at a rapid pace raises challenges related to the efficient use of resources and saving of energy in the transport network. The new traffic pattern is characterized by faster growth of metro traffic compared with core, due in part to video content replication. In this paper, we compare the resource requirements of three different transport technologies (optical...
The present paper attempts to answer the question ”is it worth implementing dynamic resource allocation in a metropolitan network ?”. Our study evaluates the gain (CAPEX and OPEX) to expect in a Time-Domain Wavelength Interleaved Network (TWIN) when the number of active Tx/Rx changes, over the day, according to the traffic matrix. We assume that TWIN is implemented in an SDN framework in which burst...
We propose a comprehensive scalable algorithm simultaneously assessing the routing, scheduling and virtualization in Time-Domain Wavelength Interleaved Network (TWIN). TWIN is an energy-efficient optical burst switching technology for metropolitan area and data center intra- and interconnections, with destinations using separate allocated sets of wavelengths for the reception. Given the costs of the...
This paper compares the respective efficiencies of the control and the management planes in performing resource allocation for TWIN (Time-domain Wavelength Interleaved Networking) optical networks used to aggregate and distribute traffic within a metropolitan area. While the Management Plane driven MAC (MP-MAC) protocol is based on an quasi-static configuration derived from optimization model, the...
Facing a tremendous IP traffic growth that does not bring significant revenues, ISPs need to improve network efficiency. They work with equipment manufacturers on solutions to improve synergies between the packet and the optical layer. If the available IP & Optical convergence solutions answer today's issues, they do not help handling the traffic pattern changes that Over The Top (OTT) players'...
We present for the first time the experimental demonstration of a Real-Time control-plane on the Multi-hEad sub-wavElength swiTching (MEET), Metro architecture. The key control assets are calculated and provided to the edge nodes in a form of grant files. These grant files eliminate the contention possibility at source nodes and destinations, thus they offer a lossless passive optical grooming and...
This paper proposes a novel Metropolitan Area Network (MAN) architecture called Multi-hEad sub-wavElength swiTching (MEET). Compared with the current architectures, MEET proposes to aggregate traffic using passive optical nodes instead of using electrical nodes (switches and routers). Several options regarding a potential control plane are compared in terms of resource allocation efficiency. Two options...
Resource allocation mechanism remains a challenging issue in the conception of the actual and future networks. In this paper, we study several resource allocation schemes for the control plane of a lossless Optical Burst Switching (OBS) solution. We carry out a comparison of the proposed schemes using simulation approach. The performances of the proposed schemes are compared in terms of waiting time,...
One of the main drawbacks of classical Optical Burst Switching (OBS) solutions is the loss of bursts when contentions occur. Time-domain Wavelength Interleaved Networking (TWIN) is a lossless solution with contention resolution in the edge nodes providing a simple and passive switching in the core nodes and satisfying both low-energy and efficient bandwidth use criteria. However, this solution requires...
The increasing of traffic in transport networks, and consequently of the power consumption, is motivating to search new solutions to improve the energy efficiency of the networks. In this work, we investigate new switching paradigms based on time-domain optical sub-wavelength switching technologies and we determine the dimensioning of networks employing these technologies. In particular, we quantify...
InterCell Interference Coordination (ICIC) is a major RRM (Radio Resource Management) feature recently included in wireless OFDMA networks. This paper studies OFDMA/ICIC algorithms. The model of networks considered is based on the LTE and WiMAX physical layers. After a state-of-the-art, we compare the simulation results of some of the proposed ICIC algorithms. We propose some adjustments to these...
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