63GPP TS 23.207. End-to-End Quality of Service(QoS) Concept and Architecture, 2012.
73GPP TS 23.228. IP Multimedia Subsystem(IMS) Stage2, 2013.
83GPP TS 23.216. Technical Specification Group Service and System Aspects; Single Radio Voice Call Continuity (SRVCC); Stage 2, 2013.
93GPP TS 24.173. IMS Multimedia Telephony Service and Supplementary Services; Stage 3, 2013.
103GPP TS 24.229. IP Multimedia Call Control Protocol Based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP): Stage 3, 2012.
