ETSI TS 102 250-2-2004 语音处理,传输和质量方面(STQ).GSM和3G网络中流行业务的QoS方面.第2部分:业务质量参数及其计算的定义(版本1.2.1)
Speech Processing, Transmission and Quality Aspects (STQ); QoS aspects for popular services in GSM and 3G networks; Part 2: Definition of Quality of Service parameters and their computation V1.2.1