Managing Distributed Feature Interactions in Enterprise SIP Application Servers

Citation

Kolberg M, Buford J, Dhara K, Wu X & Krishnaswamy V (2009) Managing Distributed Feature Interactions in Enterprise SIP Application Servers. In: IEEE International Conference on Communications, 2009. ICC '09. IEEE International Conference on Communications (ICC) IEEE International Conference on Communication (ICC), 2009. ICC '09, Dresden, Germany, 14.06.2009-18.06.2009. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), pp. 1-6. https://doi.org/10.1109/ICC.2009.5199162

Abstract
Several trends in SIP application server deployments exacerbate the classic problem of feature interaction in large enterprise telephony environments: use of distributed feature servers, mixing of legacy and green-field feature servers, and the co-existence of multiple third-party feature implementations provisioned in the same environment. Next-generation SIP application servers will include an application router (AR) to provide more control over feature sequencing. As we discuss here, the AR can be augmented to incorporate feature interaction detection and resolution logic. We describe a novel design for run-time feature interaction detection and resolution in an environment of distributed feature servers using a SIP application server with application routing function, such as that defined in JSR 289. The approach is based on the algorithm of the Kolberg-Magill (K-M) method for feature interaction detection. Here we extend the notation of the algorithm to cover advanced call control services, enable the algorithm to work in topologies involving B2BUAs and SBCs, and test the approach with a substantial feature set of 32 features.

Keywords
Communication Services; SIP; Feature Interactions; Runtime Approach; Computers Access control; Wireless communication systems.; Computer networks

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