Performance, models and topologies of common channel signalling system number seven.
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Date
1998
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Abstract
An Intelligent Network (IN) can be visualised as a central computer interconnected to
the telecommunication network that allows the creation and deployment of services as
consumer demand arises. Messages or information are transferred between the central
processor and exchanges by a standardised form of signalling, known as Common
Channel Signalling System Number Seven (CCS7).
The thesis focuses on CCS7 performance, models and topologies. A requirement of
the research entails the study of the CCS7 performance parameters: signalling delays
and signalling network dependability. Signalling delays may be comprised of
signalling message transfer delays within the message transfer part and queueing
delays. Signalling network dependability usually include availability, reliability,
maintainability and network robustness.
For the purpose of modelling, the decomposition of the CCS7 message transfer part
into subsystems is essential. A generic model for the message transfer part was used
to implement certain functionalities of CCS7 in OPNET. OPNET (Optimised
Network Engineering Tools) is a comprehensive engineering system capable of
simulating large communication networks with detailed protocol modelling and
performance analysis. The simulation software (OPNET) and performance parameters
were used to analyse CCS7 networks resulting in the selection of a particular
topology for a given region.
The network structures analysed include the mesh topology, standard quad topology,
hierarchical topology and Telstra's new topology. It was found that the mesh structure
had the best simulated and availability/reliability results but was impractical for large
networks due to the cost implications. This cost factor led to the selection of a
hierarchical signalling system for Kwa-Zulu Natal.
Description
Thesis (M.Sc.Eng.)-University of Durban-Westville, 1998.
Keywords
Signal theory (Telecommunication), Theses--Electrical engineering.