Section: 5.5.3.7 Charging Principles for Roaming Architecture for Voice over IMS with Local Breakout
Content: The Roaming Architecture for Voice over IMS with Local Breakout is described in the TS 23.228[ IP Multimedia Subsystem (IMS); Stage 2 ]  [209]. The roaming charging procedures for Roaming Architecture for Voice over IMS with Local Breakout shall be based on the existing principles described in clauses 5.5.3.1, 5.5.3.2 and 5.5.3.4. Additionally, roaming charging data for Roaming Architecture for Voice over IMS with Local Breakout shall provide the following information: - Indicator whether loopback or home routing has been applied - Final destination for the session when loopback is applied - Indicator whether OMR (Optimal Media Routing) has been applied - Charging data created by VPLMN after the loopback must be assigned to a user identified by the P-Asserted-Identity. NOTE: this is different from charging data collected for interconnection accounting, where identity of served user is optional and not relevant for post-processing. Details are described in the TS 32.260[ Telecommunication management;Charging management;IP Multimedia Subsystem (IMS) charging ]  [20]