What is SRVCC call flow?

What is SRVCC call flow?

SRVCC stands for Single Radio Voice Call Continuity. Putting it simple, it is a Handover technology between “VoIP over IMS in LTE” and Voice Call (CS) in a legacy system (e.g, WCDMA). It means it is for Handover between a Packet call in LTE and a Circuit Call in a legacy system (WCDMA).

What is SRVCC in telecom?

Single Radio Voice Call Continuity (SRVCC) provides an interim solution for handing over VoLTE (Voice over LTE) to 2G/3G networks. The voice calls on LTE network are meant to be packet switched calls which use IMS system to be made.

What is CSFB and SRVCC in LTE?

CSFB (CS Fall Back): whenever the UE have the need to place a call, make it revert (fallback) for legacy networks. SRVCC (Single Radio Voice Call Continuity): ensure that purely LTE (VoLTE) calls are transferred (via handover) to the legacy networks in a transparent manner.

What is SRVCC in 5g?

Along with LTE introduction, 3GPP also standardized Single Radio Voice Call Continuity (SRVCC) in Release 8 specifications to provide seamless continuity when an UE handovers from LTE coverage (E-UTRAN) to UMTS/GSM coverage (UTRAN/GERAN).

What is the function of SRVCC?

Single Radio Voice Call Continuity (SRVCC) allows an ongoing MMTel voice call over LTE to be handed over to the circuit-switched domain in GSM or WCDMA when losing LTE coverage, in order to reduce the number of dropped calls.

What is difference between CSFB and VoLTE?

CSFB vs VoLTE​ CSFB (Circuit Switch Fallback) is a technology that supports voice and SMS services in 4G networks using the 2G/3G systems. VoLTE (Voice over LTE), on the other hand, means that a call is made through a 4G network (Making calls over IP).

What is EPS fallback in 5G?

EPS Fallback is a mobility trigger for improving voice KPI (Key Performance Indicator) which enables 5G phones to use NGC (Next Generation Core) with New Radio for all data traffic while allowing phones to switch to LTE (Long Term Evolution) EPC (Evolved Packet Core) for voice calls.

What is the difference between SRVCC and eSRVCC?

SRVCC, proposed by 3GPP, is aimed to resolve the voice call continuity problem facing subscribers at early LTE deployment phase. eSRVCC is introduced to shorten the speech gap caused by SRVCC handovers.