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How voice packets flows through IMS network and reach to end user?

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Volte: How ip packets flows through the IMS network when voice call initiated by user. Will ip packets goes through the CSCF nodes or through which IMS nodes it will flow to reach the end user.

posted Feb 28, 2017 by anonymous

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1 Answer

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For VoLTE service, network and UE exchange SIP signalling messages and once the SIP signalling is completed data flow in form of RTP packets start flowing between end users.
1. UE sends RTP packets to eNodeB using QCI = 1 bearer
2. eNodeB forwards to SGW and SGW to PGW
3. PGW sends packets to MRF components of IMS network
4. MRF sends packet so SBC (Session Border Controller)

answer Mar 1, 2017 by Harshita
from SBC how it will transfer to end user.
commented Mar 1, 2017 by anonymous
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