Load Sharing in a Distributed IMS Architecture

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Executive Summary

The IP Multimedia Subsystem (IMS) serves as universal platform for fast and standardized creation of mobile services. Typical deployment models for the IMS favor centralized session control and application servers. Furthermore, they rely on sophisticated border elements for, e.g., policy enforcement. One step towards a simpler architecture is the integration of call control, application server, and media functions into border elements. This leads to a distributed IMS architecture with equal processing nodes, which drastically reduces system complexity and scales on functional module instantiation basis.

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