Assessment of the quality of GSM and UMTS services


Between September and October 2011 ANACOM carried out another study for the assessment of the quality of voice and video-telephony services and of coverage provided by the GSM and WCDMA (UMTS) networks of operators OPTIMUS, TMN and Vodafone in the main urban agglomerations and on the major roads of mainland Portugal.

The study relies on field tests performed from the user's standpoint, by using an automatic measurement system that reflects the several features affecting the quality of the services, namely: Network coverage, service accessibility, call completion rate and call set up time, call listening quality and call visual quality.

Mobile communications systems offer good GSM coverage levels and a good performance for the voice service in the urban agglomerations and on the major roads of mainland Portugal. The sample used provided global results for each operator, with a maximum error below 2.3% in urban UMTS agglomerations, and below 3.5% on major roads, for a 95% confidence level.

The video-telephony service and the WCDMA coverage perform differently according to the location. In urban agglomerations the video-telephony service shows good performance levels and WCDMA coverage is good. On major roads, performance and radio coverage levels are fair for operators OPTIMUS and TMN, and poor for Vodafone Portugal.


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