Telecommunication companies have received a great deal of research attention, which have many advantages such as low cost, higher qualification, simple installation and maintenance, and high reliability. However, the using of technical maintenance approaches in Telecommunication companies could improve system reliability and users' satisfaction from Asymmetric digital subscriber line (ADSL) ser...

the hierarchical hub location problem is encountered three-level network that is applied in production-distribution system, education system, emergency medical services, telecommunication network, etc. this paper addresses the hierarchical hub covering problem with single assignment accounting for mandatory dispersion of central hubs restriction as a special case. this formulation with incorpor...

Nowadays, mobile users can switch between different available networks, for example, nearby WiFi networks or their standard mobile operator network. Soon it will be extended to other operators. However, unless telecommunication operators can directly benefit from allowing a user to switch to another operator, operators have an incentive to keep their network quality of service confidential to a...

The Internet Protocol Network Design Problem with Reliability and Routing Constraints (IPRR) can be shortly stated as follows. A telecommunication network is given in terms of a set of nodes and a set of traffic demands; we want to define the minimum cost capacity reservation such that all the traffic is routed even under fault scenarios. Capacity is provided by reserving some already installed...

The technological revolution witnessed by the telecommunications industry is leading to the development of new applications, products and protocols, which in turn solicits widely accessible, highly reliable and high quality networks. To meet the stringent quality and reliability requirements of today’s complex communication networks, efficient test methodologies are necessary at all levels. Con...