Optical networks have been widely implemented and they are usually used as the backbone of high-capacity telecommunication infrastructures. However, the nowadays traffic demand over these networks has increased in a way that congestion over the architecture is considerable. Due to the high costs of implementing new optical links, the routing and wavelength assignment process become an important...

Autoregressive integrated moving average (ARIMA) models are used in different researches for modelling and forecasting of traffic and Quality of Service (QoS) parameter values in telecommunication networks to make reasonable short, mediumand long-term predictions. We propose methodology to use ARIMA models for QoS prediction in network scenarios based on a preliminary detection and elimination ...

Visual exploration of massive data sets arising in the telecommunication industry is a challenge. This paper describes a number of different techniques for visually exploring large data sets. The techniques cover a wide range of techniques, including statistical 2D displays, pixel-oriented displays, and dynamic 3D displays with variable resolution. The techniques have been successfully applied ...

Telecommunication networks of known reliability are frequently upgraded as traffic patterns change. In this paper we will present theorems and an algorithm which could be used to solve the problem of adding a single link of known failure probability to a network such that the marginal increase in 2-terminal reliability is maximized. The theorems presented will subsequently be used to derive upp...

This paper suggests new queuing models, in the Markovian framework, which can tackle the presence of burstiness in the traffic and autocorrelations among the inter-arrival times of packets in the performance evaluation of next generation networks. These models are essentially based on certain generalizations of the Quasi Birth-Death (QBD) processes. Efficient steady state solution of these new ...

Broadband satellite communication networks, operating at Ka band and above, play a vital role in today’s worldwide telecommunication infrastructure. The problem, however, is that rain can be the most dominant impairment factor for radio propagation at these frequencies. This paper, addresses bandwidth and time-slot allocation problem for rain faded DVBRCS satellite networks. We formulate the ta...

Global telecommunication systems are at the heart of the Internet revolution. To support Internet traffic they have built-in redundancy to ensure robustness and quality of service. This requires complex fault management. The traditional hard approach is to reduce the number of alarm events (symptoms) presented to the operating engineer through monitoring, filtering and masking. The goal of the ...

We consider a multi-station fluid model with arrivals generated by a big number of non-homogeneous heavy-tailed On/Off sources. If the model is feedforward in the sense that fluid cannot flow from one station to other with lighter tail distributions, we prove that under heavy-traffic, the scaled workload converges in distribution to a reflected fractional Brownian motion process with multidimen...

Currently, there is a great need in communities, such as telecommunication network simulation and transportation systems simulation, to be able to publish/pull models to/off the Web and assemble and simulate a virtual configuration of choice by the end-user. For example, in Internet simulations, users would like to be able to search for the most efficient/relevant traffic source models, network...