Solomonides, Christos; (2001) The evolution of control architectures towards next generation networks. Doctoral thesis (Ph.D.), University College London (United Kingdom).

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Abstract

This thesis describes the evolution of control architectures and network intelligence towards next generation telecommunications networks. Network intelligence is a term given to the group of architectures that provide enhanced control services. Network intelligence is provided through the control plane, which is responsible for the establishment, operation and termination of calls and connections. The work focuses on examining the way in which network intelligence has been provided in the traditional telecommunications environment and in a converging environment. In the case of the traditional telecommunications environment, the thesis examines the Intelligent Network (IN) architecture as a case scenario. In the case of the converging telecommunications environment, the work focuses on examining the relation and impact of emerging architectures and protocols and the ways in which these can inter-work with the IN. The discussion is presented using a taxonomy reference model of network intelligence architectures and their relation to the IN. For example, a protocol based on existing IN capabilities is presented that allows end users to engage in electronic commerce without the need for credit cards. The control plane architecture in the Public Switched Telephony Network (PSTN) is heavily based on state machines. The role of state models and the reliance of IP-based protocols on state models are also examined. For this, IP-based architectures are examined and the extent of state utilisation is presented. This enables a classification of IP-based architectures and protocols to be drawn with regard to state utilisation. The role of existing network intelligence within the context of open programmable networks and application servers is also examined. The work identifies the need for a common communications framework between third-party service providers. This is the focus of the API server architecture, which draws from IN concepts and from approaches in the IP domain.

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