8. VoLTE Evolution ( Including CSFB , SMS over SGs Flows , VoLTE Flows )

Volte evolution ( Including CSFB , SMS over SGs Flows , VoLTE Flows )

https://telecomtutorial.info

We are going to see evolution of 2G , 3G networks to 4G LTE and further to VoLTE IMS . By End of this module , You will be able to get detailed understanding of :-

Section # 1 (Evolution of Telephony)
Difference between 2G / 3G –vs- 4G Non-VoLTE –vs- VoLTE Networks
Services in Non-VoLTE 4G Vs VoLTE Networks
The Problem with 4G (Non-VoLTE) Network ?

Section # 2 (Voice Service Flow)
Call in CS Core 2G / 3G Networks
Call via CSFB where VoLTE is not available along with 4G
Call in VoLTE where both 4G & VoLTE exists

Section # 3 (SMS Service Flow)
SMS in CS Network : Using 2G / 3G
SMS over SGs : SMS transit via SGs Link between 4G & 2G/3G
SMS in VoLTE : over 4G Network using IP SM GW

Section # 4 ( CS Network Integration with VoLTE Networks )
Re-use CS Network for VoLTE
SRVCC between 4G and 2G/3G Networks
Break-out Call to PSTN , or Break-in Call from PSTN
IMS to CS Network connectivity for General Purpose - OCS via ( CAMEL  , Ro ), VAS Services ( Reuse CS ) , SMSC & USSD ( Reuse CS ) , TADS & Break-out to CS , Break-in Call from CS Core , Voice Mail , Short Codes , Toll Free , Emergency Call etc ..

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