ASSESMENT OF NEXT GENERATION NETWORK, SERVICES AND MIGRATION STRATEGIES The Case of Ethiopian Telecommunication Corporation
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Date
2005-08
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Addis Ababa University
Abstract
The development of telecommunication systems during the past two decades has been
from the circuit switched towards the packet switched paradigm. Initially a distinction
was made between telecommunications and computer networks which is hardly
applicable in today's reality. Incumbent network operators are running legacy circuitswitched
telephony networks which inhibit them from enjoying the benefits of packet
switching. Many operators have now started the paradigm shift in the telephony network
by moving to packet based technologies. This new approach is often called Next
Generation Networks (NGN). According to ITU Next Generation Network (NGN) is a
packet-based network able to provide telecommunication services and able to make use
of multiple broadband, QoS-enabled transport technologies and in which service-related
functions are independent from underlying transport-related technologies. It offers
unrestricted access by users to different service providers. It supports generalized
mobility which will allow consistent and ubiquitous provision of services to users
NGN enables the network operators to run all services on one network, i.e. voice, data
and video.
In this thesis the transformation of the legacy network to NGN in general and the
Ethiopian Telecom migration in particular will be examined. This work reviews the
evolution of voice telecommunications and attempts to analyze the network and service
point of view as the industry migrates from circuit switched networks to packet switched
networks. For the network part, the work tries to asses the legacy PSTN network
elements with the NGN softswitched network. In the service part, a service modeling
tool from Alcatel have been used to analyze and model next generation network services
for the case of Ethiopian Telecommunication Corporation
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Keywords
Telecommunication, Corporation