An Ge

On optical burst switching and self-similar traffic

In this letter we consider burst switching for very high speed routing in the next generation Internet backbone. In this scenario, Internet protocol (IP) packets to a given destination are collected in bursts at the network edges. We propose a burst assembly mechanism that can reduce the traffic autocorrelation or degree of self-similarity, and at the same time keep the delay due to burst formation limited at the network edges.

A new scheduling algorithm for asynchronous variable length IP traffic incorporating void filling

We demonstrate that optimum switch performance can be achieved by matching the basic delay line unit in the optical buffer to the degree of self-similarity of the input traffic, in tandem with a scheduling algorithm for void filling.

Traffic engineering in metro Ethernet

Traffic engineering is a critical issue that has to be addressed in metro Ethernet networks for proper and efficient resource utilization as well as facilitating quality of service. This article aims at understanding the relevant issues and outlines novel algorithms for multipoint-TE in the metro Ethernet. We first propose a grouping scheme that extends the current label space in the provider domain and allows for a large number of VLANs to be provisioned efficiently. Next, the issues of load balancing, multiple spanning trees, and interaction between grouping and bandwidth provisioning are discussed, and solutions are provided. Finally, we address differentiated survivability in next-generation Ethernet and provide a novel scheme based on multiple spanning trees. The schemes proposed in this article are shown to be scalable, bandwidth-efficient, and practical for both the customer and the provider.

Differentiated Survivability in Ethernet-Based MAN/WAN

In this paper, we address the problem of providing differentiated levels of protection in MAN/WAN Ethernet environments. The IEEE 802.3ad bundling mechanism of Link-Aggregation is used to mitigate disruption of traffic due to link failure. We focus on the network design problem of accommodating Ethernet Virtual Connections (EVCs) traffic with given protection requirement with minimum budget utilizing novel Traffic Engineering (TE)based schemes. The initial investment cost of linkaggregate upgrade can be recovered by providing differentiated survivability services to customers.

Augmented Hose-A Traffic specification Model for Metro Ethernet

There are currently two widely used traffic specification models: The pipe and hose models. The pipe model provides the most efficient interface for the provider in terms of bandwidth allocation. However, it suffers from being complex and it requires pair-wise traffic information from the customer; which can be very difficult to obtain. The hose model, on the other hand, does not require knowledge of pair-wise traffic, but only aggregates. In addition, it is easy to specify by the customer. However, the lack of exact traffic distributions makes it least efficient in terms of bandwidth allocation. To achieve a balance between the benefits of both the pipe and hose models, we introduce the augmented hose model for metro Ethernet networks

Differentiated and fair congestion control using efficient buffer management (DifCom) for the metro Ethernet

This paper presents an efficient scheme in regulating the flow and avoiding congestion in a differentiated and fair manner for metro Ethernet. Preliminary studies have shown that the proposed scheme has the ability to promote max-min fair allocation of bandwidth across the network. It also has the ability to avoid conflicts with TCP control functions.

FWM noise reduction in bursty metro transmission

We analyze the occurrence of FWM. noise in bursty metro network transmission of Ethernet packets directly on the WDM layer. We obtain more than 5 dB reduction in FWM noise for traffic loads less than 0.7 both for uniform and self-similar traffic.

Impact of asynchronous traffic on fast optical packet switching

The effect of asynchronous traffic on the output optical SNR of gain-clamped semiconductor optical amplifier (GC-SOA) space switch matrix is studied. Variation of optical SNR at the output is observed.