Measuring speech quality is an increasingly important aspect in Voice over Internet Protocol (VoIP) networks for legal, commercial and technical reasons. To measure the speech quality of live-traffic, a non-intrusive solution is needed. The E-Model proposed by the International Telecommunication Union-Telecommunication Standardisation Sector (ITU-T) achieves this, but it requires subjective tes...

The continuous growth of subscribers and the large variety of requested services in cellular communication networks are driving the telecommunication industry to provide ubiquitous information access and diversified services by requiring different bandwidth and Quality of Service (QoS). Proposals being pursued in several studies and field implementations address these needs using hierarchical a...

This paper presents a multiobjective optimization algorithm for solving tri-objective optimization problems with objectives of very different scales. As a version of the Multiobjective Evolutionary Algorithm based on Decomposition (MOEA/D), it adopts the Normal Boundary Intersection (NBI) based Tchebycheff approach to decompose a multiobjective optimization problem into a number of single objec...

This paper presents our approach integrating a high level of intelligence within telecommunication networks. Artificial intelligence has proved its efficiency in resolving complex issues in different fields like air traffic control, robotics, and medical diagnosis. However its usage in telecommunication networks is still very moderated. The main objectives of our framework is to encourage the d...

A model of an overall telecommunication network with virtual circuits switching, in stationary state, with Bernoulli-Poisson-Pascal (BPP) input flow, repeated calls, limited number of homogeneous terminals and 8 types of losses is considered. One of the main problems of network redimensioning is estimation of the traffic offered in the network because it reflects on finding of necessary number ...

With the commercialization of fifth-generation (5G), rapid popularity mobile Over-The-Top (OTT) voice applications brings huge impacts on traditional telecommunication call services. Tunnel encryption technology such as Virtual Private Networks (VPNs) allow OTT users to escape supervision network operators easily, which may cause potential security risks cyberspace. To monitor harmful in contex...

In criminal investigations, telecommunication wiretaps have become a common technique used by law enforcement. While phone-based wiretapping is well documented and the procedure for their execution are well known, the same cannot be said for Internet taps. Lawfully intercepted network traffic often contains a lot of encrypted traffic making it increasingly difficult to find useful information i...

Network Function Virtualization (NFV) allows datacenters to consolidate network appliance functions onto commodity servers and devices. Currently telecommunication carriers are re-architecting their central offices as NFV datacenters that, along with Software-Defined Networking (SDN), help network service providers to speed deployment and reduce cost. However, it is still unclear how a carrier ...

Queueing theory plays an important role in the design of telecommunication networks. Simple models, like fluid queues or classical single-server queues, can often be used to obtain insightful results, e.g., to predict the global traffic behavior. Traditional queueing models typically assume that the interarrival and service times have finite variance (e.g., exponential or Erlang distribution). ...