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An energy-saving strategy for application-centric networks is proposed. A new architecture for energy-efficient Ethernet that meets the quality of service requirements for different classes of service is studied.
Due to the ever-growing network capacity demand, energy-efficient and scalable networking solutions are needed in all networking segments. In this paper, three metropolitan ring architectures are considered and compared for resource and power utilization: Ethernet, Reconfigurable Optical Add-Drop Multiplexers (ROADM), and an optical packet switching (OPS) scheme called Packet Optical Add-Drop Multiplexers...
In this paper we present an approach for supporting best effort traffic on an ECOFRAME ring network which has been dimensioned primarily for Guaranteed Traffic. This approach is reservation based, and is combined within the ECOFRAME MAC with the opportunistic access method used for Guaranteed traffic. The reservation method is intended to both protect the Guaranteed traffic and allocate fair shares...
This paper considers optical WDM multi-ring metro networks that can be used to support simultaneously multiple client layers. In each ring, time is slotted and Optical Packet Switching (OPS) is implemented thanks to an out of band control channel. Optical packets are thus transparently transmitted between any two nodes on a given ring. We propose here a novel MAC protocol that supports multiple client...
This paper analyses techno-economical and performance aspects of a Packet-Optical Add/Drop Multiplexer (P-OADM) based ring network. The paper demonstrates that this solution could reduce CAPEX of nodes while maintaining high network performance.
The paper compares four architectural designs for packet-OADM-based unidirectional WDM rings, in terms of design cost and scheduling complexity. The tradeoffs between design cost and scheduling complexity are analyzed.
The Ethernet PON (EPON), standardized by the IEEE Ethernet First Mile Alliance, is viewed by many as an attractive solution to deliver very high-speed broadband access. While downstream traffic is broadcasted to all customers, the access of upstream traffic to the fiber has to be arbitrated in order to avoid collisions. This is achieved by designing both a dynamic bandwidth assignment (DBA) that shares...
With the rapid dependency on the Internet for business, and the fast spread of powerful destructive DoS/DDoS attack tools, the detection and thwarting of these attacks is primordial for ISP, enterprises, hosting centers, etc. In this paper, we present the implementation of a new framework, for efficient detection and identification of flooding attacks over high speed links. To accomplish that, we...
The present paper considers a WDM optical packet ring in which multiple wavelengths are operated in a synchronous manner. This architecture attempts to blend packet switching techniques with optical transparency in order to offer a flexible MAN architecture able to accommodate large amounts of traffic demands. This architecture also performs traffic ldquogroomingrdquo (aggregation between different...
This paper addresses the impact of traffic profiles on the efficiency and performance of synchronous optical packet rings. Synchronous optical packet rings are developed to replace the currently deployed circuit based MAN architectures. The studied system differs from the well known resilient packet ring in the sense that optical packets are not electronically processed when transiting through nodes;...
The Broadband Passive Optical Network (PON) technology is a promising approach to establish a cost-effective access network. It is intended to provide a simple, low cost, scalable solution capable of delivering broadband access to end users, by passively sharing a single optical fiber transmission system between several packets. While downstream traffic is broadcast to all packets, the access of upstream...
Broadband Passive Optical Network (PON) technology is a promising approach to establish a cost-effective access network. It is intended to provide a simple, low cost, scalable solution capable of delivering broadband access to end users, by passively sharing a single optical fibre transmission system between several customers. While downstream traffic is broadcasted to all customers, the access of...
This paper addresses the issue of multiservice support in IEEE 802.16 or WiMAX networks. The capacity for supporting multiple service classes is indeed important for any access technology where bandwidth is limited, which is the case for IEEE 802.16. The standard currently proposes four traffic classes, and specifies that for uplink traffic, the first one (UGS) receives periodic grants whereas the...
This paper presents a mechanism for dynamic resource management and discusses its relevance for traffic in IEEE 802.16 broadband wireless network. The basic goal is to minimize the amount of bandwidth being actually provisioned for committed bandwidth traffic while keeping the cost of MAC signalling to a minimum. In particular, this mechanism restricts the provisioned bandwidth to a predefined minimum...
This article proposes a new architecture, which once implemented, would help in achieving end-to-end quality of service (QoS) requirements of an application which is being served in an interworking system of IEEE 802.16/WiMAX and IEEE 802.11e/WiFi networks. Our approach strives at mapping the QoS requirements of an application originating in IEEE 802.11e network to a serving IEEE 802.16 network and...
This paper addresses the problem of resource allocation for ATM connections carrying either CBR or VBR applications, for the first generation of ATM equipments. Evaluating the resources needed for the transfer phase of an ATM connection is a first step in the design of a CAC taking into account both call and transfer level QoS. The required amount of resources is estimated on the basis of traffic...
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