VoLTE IMS Architecture

VoLTE IMS Architecture

• VoLTE SIP Handset : SIP Support , UAC , UAS , User Agent , SIP-UA
• Underlying LTE Network : MME , SGW , PGW , PCRF , HSS , Dedicated Bearer , QCI , Default Bearer
• IMS Core : SIP Servers , P-CSCF , I-CSCF , S-CSCF , TAS , MMTEL , BGw , MRF , ATCF , ATGW , IBCF , MGCF , IM-MGW , TrGW
• Voice Core or PSTN Network for Break-in or Break-out Calls