Context-sensitive call control using constraints and rules

Authors:
David Lesaint;Deepak Mehta;Barry O'Sullivan;Luis Quesada;Nic Wilson
Affiliations:
BT Research & Technology, BT, UK;Cork Constraint Computation Centre, University College Cork, Ireland;Cork Constraint Computation Centre, University College Cork, Ireland;Cork Constraint Computation Centre, University College Cork, Ireland;Cork Constraint Computation Centre, University College Cork, Ireland
Venue:
CP'10 Proceedings of the 16th international conference on Principles and practice of constraint programming
Year:
2010

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Abstract

Personalisation and context-awareness are fundamental concerns in Telephony. This paper introduces a rule-based system - 4CRULES - which enables context-sensitive call control by the means of feature configuration rules. 4CRULES is interoperable with standard context services and compositional feature architectures. It has been designed to resolve feature interactions, manage conflicting preferences, and mitigate the uncertainty affecting context data. This is achieved through a constraint optimisation model that maximises adherence to user requirements and domain constraints. Experiments on a suite of instances confirm the practicality of the approach and highlight performance- and adherence-critical factors.