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Capacity optimization for adaptive multi-rate in UMTS systems

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4 Author(s)
G. Helmer ; WCDMA Syst. Design, Ericsson Eurolab Nurnberg, Nuremberg, Germany ; A. Garavaglia ; G. Knopp ; W. Koch

Adaptive multi-rate (AMR) can be used for voice applications in UMTS systems where high spectral efficiency and system stability are required while guaranteeing; good speech quality. We investigate the trade-off between the system resource utilization and the provided quality of voice services, by proposing a method that considers both aspects of quality and capacity for the optimal assignment of speech data rates in 3rd generation cellular systems. Preliminary results, obtained with a simple model, indicate that a substantial capacity increase can be achieved in comparison to non-optimal cases. Moreover, the simplicity of the approach allows a straightforward application in real-time assignment strategies.

Published in:

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th  (Volume:7 )

Date of Conference:

26-29 Sept. 2004