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CSFB and SMSoSGs ver 16 - Leliwa

Leliwa Technical Bulletin csfb and SMSoSGs Date: Date: Revision: 003/CAS/002. Author: Jakub Bluszcz Copyright 2010 Leliwa . All Rights Reserved. 1. Leliwa Technical Bulletin csfb and SMSoSGs Table of contents Topic Page Architecture ..4. Co-existence with IMS ..5. Attach procedure ..7. TA/LA update Mobile originating call ..11. Mobile Terminating Call ..13. Acronyms and Abbreviations ..17. References ..18. 2. csfb and SMSoS Leliwa Technical Bulletin Introduction The CS FallBack ( csfb ) in EPS enables the provisioning of voice and other CS-domain services ( CS UDI video, LCS, USSD) by reuse of CS. infrastructure when the UE is served by E-UTRAN. A csfb enabled terminal, connected to E-UTRAN may use GERAN or UTRAN to connect to the CS-domain. This function is only available in case E-UTRAN coverage is overlapped by either GERAN coverage or UTRAN coverage. CS domain service GERAN MSC CS network /UTRAN server HO or cell reselection SGs CS-domain service Paging or Service Request examples: voice, CS UDI video, E-UTRAN MME LCS, USSD.

CSFB and SMSoS Leliwa Technical Bulletin 3 Introduction Introduction The CS FallBack (CSFB) in EPS enables the provisioning of voice and other

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Transcription of CSFB and SMSoSGs ver 16 - Leliwa