Impact of statistical multiplexing on voice quality in cellular networks

Authors:
Thomas Enderes;Swee Chern Khoo;Clare A. Somerville;Kostas Samaras
Affiliations:
Lucent Technologies, Optimus, Swindon SN5 6PP, UK;King's College London, Strand, London WC2R 2LS, UK;Lucent Technologies, Optimus, Swindon SN5 6PP, UK;Raycap Corporation, Telou & Petroutsou 14, Maroussi, Athens 15124, Greece
Venue:
Mobile Networks and Applications - Analysis and Design of Multi-Service Wireless Networks
Year:
2002

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Abstract

This paper examines the quality of transmission of voice over cellular, packet-switched networks. The medium access mechanism in the uplink is simulated under various statistical multiplexing scenarios in order to assess the effect of front-end clipping on voice quality. Moreover, the simulation is implemented in a real-time demonstration platform utilized to acquire subjective indicators of voice quality by performing Mean Opinion Score (MOS) tests. Results from the MOS tests are reported, and an analysis of the obtained speech samples is presented. Finally, the results are summarized and potential further directions for the simulation tool and the speech models are discussed.