ETSI TR 123 977-2004 全球移动通信系统(UMTS).宽带和资源节约(BARS)以及电路交换(CS)网的语音增强3GPP TR 23.977(版本6.1.0,第6次发布)
Universal Mobile Telecommunications System (UMTS); Bandwidth And Resource Savings (BARS) and speech enhancements for Circuit Switched (CS) networks 3GPP TR 23.977 version 6.1.0 Release 6