CS Fallback (CSFB ) in LTE
This tutorial describe details of LTE CSBF : Circuit Switch Fall Back, which is essential for early adaptation of voice over LTE network. LTE was made for packet based services. But a majority part of today’s traffic originates from CS based services like Voice and SMS. Therefore 3GPP agreed to include an intermediate solution for CS (Circuit Switch) based services until IP-based services like VoLTE (more ..)