I-CSCF in IMS Network
I-CSCF refers to "Interrogating Call Session Control Function". It selects the appropriate S-CSCF to handle the user's session. And accordingly, it routes the SIP signalling messages to the selected S-CSCF.
In addition, the I-CSCF serves as the contact point within the IMS network for all inbound SIP signalling traffic from external networks.
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VoLTE (Voice over LTE) Introduction
While the UE attached to LTE network, the UE can initiate, or receive a voice or a video call. The UE achieves this, by connecting to an external network, which is the 'IMS' network. We can call this, Voice over LTE (VoLTE). This is exactly like when you would like to create a call, while…
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What is an ‘EPS Bearer’ in LTE ?
During 'LTE attach' procedure, the network establishes this EPS Bearer between the UE and the PGW. The PGW assigns an IP address for this Bearer. The UE uses this IP address, in order to communicate with the PDN. In addition, the PGW assigns a QoS for this Bearer, which guarantees the QoS for the data…
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