End to End Quality of Service in UMTS Systems
Wei Zhuang · InTech eBooks · 2012
About ten years ago, WCDMA 1 based the third generation mobile systems started to be deployed worldwide. Besides to support basic mobile data services such as file transfer and internet surfer, etc., UMTS has one of the most significant archievements which can support a richer variety of services with QoS guarantee, such as video, VOIP, etc. Quality of Service (QoS) is defined as ”the collective effect of service” performance, which determines the degree of satisfaction of a user of the service in the ITU-T recommendation E.800. At a technical level, QoS can be characterized by service availability, delay, jitter, throughput, packet loss rate (Nortel White Paper, 2002).