SlideShare a Scribd company logo

UMTS/LTE/EPC Call Flows for CSFB

Justin MA (馬嘉昌)
Justin MA (馬嘉昌)

It is a handbook of UMTS/LTE/EPC CSFB call flows. This document is originally edited by Justin MA and it is free to share to everyone who are interested. All reference/resource are from internet. If there is any copy-right issue, please kindly inform Justin by majachang@gmail.com. Thanks for your reading!

1 of 27
Downloaded 4,253 times
1
LTE CSFB Call Flows Edited By Justin MA Created: June 2014 Updated: 2014_0714 Date and Version Author Change Note 2014_0630; v1.0 Justin MA Basic call flows 2014_0714; v1.1 Justin MA Call Release with IR LTE and SAE netwroks 1/27 Ref:
2
Ref: Ericsson 2/27
3
Ref: Ericsson 3/27
4
General Voice over LTE solutions: 4/27 Ref:
5
5/27 Ref:
6
6/27 Ref:
7
Ref: Ericsson 7/27
8
Attach Procedure for LTE/WCDMA modes 8/27 Ref: 3GPP 23.272 V12.3.0
9
Basic CSFB MO Call Flow 9/27 Ref:
10
10/27 Ref:
11
Ref: ...etc 11/27
Most read
12
Mobile Originating call in Active Mode - PS HO supported 12/27 UE/MS MMEBSS/RNS MSCeNodeB SGSN Serving GW 2. Optional Measurement Report Solicitation 4b. A/Iu-cs message (with CM Service Request) 4b. CM Service Request Location Area Update or Combined RA/LA Update 5. CM Service Reject 5. CM Service Reject If the MSC is changed 3a. PS HO as specified in 23.401 [2] (preparation phase and start of execution phase) 6. CS call establishment procedure 1a. Extended Service Request 1b. S1-AP Request message with CS Fallback indicator 7. PS HO as specified in 23.401 [2] (continuation of execution phase) 1c. S1-AP Response message 4a. Location Area Update 3c. Update Bearer(s) 3b. Suspend P-GW/ GGSN 1d. MO CSFB Indication Ref: 3GPP 23.272 V12.3.0
13
Mobile Originating call in Active Mode – No PS HO support 13/27 UE/MS MMEBSS/RNS MSCeNodeB 2. Optional Measurement Report Solicitation 10b. Location Area Update 10a. Service Reject 10c. CS MO call 6. UE changes RAT then LA Update or RA Update or LAU and RAU 3a. NACC, 5. S1 UE Context Release 1a. NAS Extended Service Request SGW/PGW 4. S1-AP: S1 UE Context Release Request 1b. S1-AP UE Context Modification Request with CS Fallback indicator 7a. Suspend (see 23.060) 8. Update bearer(s) SGSN 7b. Suspend Request / Response 11. Routing Area Update or Combined RA/LA Update 3b, 3c. RRC connection release If the MSC is changed 1c. S1-AP UE Context Modification Response message 9. CM Service Request 9. A/Iu-cs message (with CM Service Request) 1d. MO CSFB Indication Ref: 3GPP 23.272 V12.3.0
14
Basic CSFB MT Call Flow 14/27 Ref:
Most read
15
Ref: Huawei 15/27
16
Ref: Huawei 16/27
17
Mobile Terminating call in idle mode 17/27 1. IAM 3. IAM 4. Paging Request 5. Paging 6. Paging 2. SRI procedure in TS 23.018 G-MSCeNodeB RNC/BSCUE MME HSS MSC VLR 8. After the UE context setup the procedure continues as described the active mode mobile terminated call procedures described in Clause 7.3 and 7.4. If the eNodeB knows that PS HO is supported the procedure in clause 7.3 “Mobile Terminating call in Active Mode - PS HO supported” may be applied from step 2, in Clause 7.3, and onwards If the eNodeB knows that PS HO is not supported the procedure in clause 7.4 “Mobile Terminating call in Active Mode – No PS HO support” shall be applied from step 2 in Clause 7.4, and onwards 7a. Extended Service Request 7b. Initial UE Context Setup 7a. Service Request Ref: 3GPP 23.272 V12.3.0
18
Mobile Terminating call in Active Mode - PS HO supported 18/27 4a. Location Area Update 4b. Paging Response 4b. A/Iu-cs message (with Paging Response) 5b. Signalling Connection Release 5b. Connection Reject If the MSC is changed 5b. Location Area Update or Combined RA/LA Update 5c. CS call establishment procedure 6. PS HO as specified in 23.401 [2] (continuation of execution phase) 5a. Establish CS connection Option 1: MSC is not changed 3c. Update Bearer(s) 3b. Suspend P-GW/ GGSN 2. Optional Measurement Report Solicitation 3a. PS HO as specified in 23.401 [2] (preparation phase and start of execution phase) 1e. S1-AP UE Context Modification Response message 1d. S1-AP UE Context Modification Request with CS Fallback indicator UE/MS MMEBSS/RNS MSCeNodeB SGSN Serving GW 1b. NAS Extended Service Request 1a. Paging Request 1a. CS SERVICE NOTIFICATION 1c. CS Paging Reject 1a. Service Request Ref: 3GPP 23.272 V12.3.0
19
Mobile Terminating call in Active Mode - No PS HO support 19/27 IF THE MSC IS CHANGED UE/MS MME MSC 3a. CCO/NACC, 3b, 3c. Signalling connection release eNodeB 2. Optional Measurement Report 9. Paging Response 9c. Location Area Update or Combined RA/LA Update 9b. Signalling Connection Release S-GW/PGW 1b. NAS Extended Service Request 1d. S1-AP UE Context Modification Request with CS Fallback indicator 1c. CS Paging Reject 7a. Suspend (see TS 23.060) 8. Update bearer(s) 7b. Suspend Request / Response 9b. CONNECTION REJECT 1A. CS SERVICE NOTIFICATION 1A. PAGING REQUEST SGSN 6.UE changes RAT then, LAU OR RA UPDATE OR LAU AND RAU 5. S1 UE CONTEXT RELEASE BSS/RNS 4. S1-AP: S1 UE CONTEXT RELEASE REQUEST 1A. SERVICE REQUEST 1e. S1-AP UE Context Modification Response message 9a. Establish CS connection Ref: 3GPP 23.272 V12.3.0
20
20/27 Ref:
21
Ref: ...etc 21/27
22
22/27 Ref:
23
Roaming Retry for CS fallback 23/27 GMSC HLR Old VMSC/VLR New VMSC/VLR MS PRN (call ref.,GMSC@, Roaming retry) 2 PRN ACK (MSRN) SRI ACK IAM (MSRN) Paging LocUpdate Authentication Procedure Update Location Cancel Location 3 Cancel Location Ack RCH (call reference, roaming retry) Insert Subscriber Data (multiple) Insert Subscriber Data (continued) Update Location Ack Further procedures related to location update. e.g. ciphering, TMSI reallocation.PRN New VMSC/VLR may delay setup until location update procedure finishes 8 PRN ACK (MSRN) 7 LocUpdate Accept TMSI Reallocation Complete Normal MT call procedure follows Old MSC stops paging timer and inform GMSC 2nd SRI ACK (MSRN) 7 2nd SRI (B, basic call interrogation) 5 REL RLCs 4 ACK HLR delays the sending of PRN until location update procedure finishes 6 SAE/LTE CSFallback Setup SRI (B, GMSC@,call Ref.,Roamingretry) 1 IAM (MSRN) Call Confirmed Ref: 3GPP 23.272 V12.3.0
24
Roaming Forwarding for CS fallback 24/27 GMSC HLR Old MSC/VLR New MSC/VLR MS SRI (B) PRN PRN ACK (MSRN)SRI ACK IAM (MSRN) Paging Location Update 2. Update Location (MTRF supported)1 3. Cancel Location (MTRF Supported And Authorized, New MSC/VLR numbers) Cancel Location Ack 6. PRN (MTRF indication, Old MSC number, last used LTE PLMN) Insert Subscriber Data (multiple) Insert Subscriber Data (continued) Update Location Ack Further procedures related to location update. E.g. ciphering, IMEI checking, TMSI reallocation. 10. New VMSC/VLR delays setup until location update procedure finishes. 8. PRN Resp (MSRN’) 9. IAM (MSRN’) Location Update Accept TMSI Realloc Complete Setup Call Confirmed Normal MT call procedure follows 4. Old MSC stops paging timer 7. After Update Location Ack is received, the new VLR returns MSRN’ to the old VLR. 5. If HLR authorises MTRF then use new MSC/VLR numbers to trigger sending of PRN Req 1. Send Identification (MTRF supported, New MSC/VLR numbers) CSFB Ref: 3GPP 23.272 V12.3.0
25
1x RTT CS Pre-Registration over EPS Procedure 25/27 1xCS CSFB UE E- UTRAN MME 1xCS IWS 1xRTT MSC 4. 1xRTT CS registration request 4a. UL/DL Information Transfer 4b. UL/DL S1 cdma2000 Tunnelling 4c. S102 Direct Transfer 6. 1xRTT CS registration response 6c. UL/DL Information Transfer 6b UL/DL S1 cdma2000 Tunnelling 6a. S102 Direct Transfer 1. UE attaches to E-UTRAN as specified in TS 23.401 5. Location update to 1xRTT CS domain 2. Decision to register with 1xRTT CS 3. Service Request procedure if the UE is in idle state . Ref: 3GPP 23.272 V12.3.0
Most read
26
CS MO call using fallback to CDMA 1x RTT network 26/27 1xCS CSFB UE E- UTRAN MME 1xCS IWS 1xRTT MSC 1. UE is E -UTRAN attached and registered with 1xRTT CS 11. 1x MO call establishment per 3GPP2 specifications 4. UE Context Modification Request 3. Extended Service Request S-GW/ P-GW 5. Optional measurement report solicitation 7. S1 UE Context Release Request 8. Suspend Notification 10. UE Context Release 2. UE decision to perform MO call in 1xCS 6. E-UTRAN triggers RRC connection release with redirection 4. UE Context Modification Response 9. Suspend Acknowledge Ref: 3GPP 23.272 V12.3.0
27
CS MT call using fallback to CDMA 1x RTT network 27/27 Ref: 3GPP 23.272 V12.3.0
LTE CSFB Call Flows Edited By Justin MA Created: June 2014 Updated: 2014_0714 Date and Version Author Change Note 2014_0630; v1.0 Justin MA Basic call flows 2014_0714; v1.1 Justin MA Call Release with IR LTE and SAE netwroks 1/27 Ref:
Ref: Ericsson 2/27
Ref: Ericsson 3/27
General Voice over LTE solutions: 4/27 Ref:
5/27 Ref:
6/27 Ref:
Ref: Ericsson 7/27
Attach Procedure for LTE/WCDMA modes 8/27 Ref: 3GPP 23.272 V12.3.0
Basic CSFB MO Call Flow 9/27 Ref:
10/27 Ref:
Ref: ...etc 11/27
Mobile Originating call in Active Mode - PS HO supported 12/27 UE/MS MMEBSS/RNS MSCeNodeB SGSN Serving GW 2. Optional Measurement Report Solicitation 4b. A/Iu-cs message (with CM Service Request) 4b. CM Service Request Location Area Update or Combined RA/LA Update 5. CM Service Reject 5. CM Service Reject If the MSC is changed 3a. PS HO as specified in 23.401 [2] (preparation phase and start of execution phase) 6. CS call establishment procedure 1a. Extended Service Request 1b. S1-AP Request message with CS Fallback indicator 7. PS HO as specified in 23.401 [2] (continuation of execution phase) 1c. S1-AP Response message 4a. Location Area Update 3c. Update Bearer(s) 3b. Suspend P-GW/ GGSN 1d. MO CSFB Indication Ref: 3GPP 23.272 V12.3.0
Mobile Originating call in Active Mode – No PS HO support 13/27 UE/MS MMEBSS/RNS MSCeNodeB 2. Optional Measurement Report Solicitation 10b. Location Area Update 10a. Service Reject 10c. CS MO call 6. UE changes RAT then LA Update or RA Update or LAU and RAU 3a. NACC, 5. S1 UE Context Release 1a. NAS Extended Service Request SGW/PGW 4. S1-AP: S1 UE Context Release Request 1b. S1-AP UE Context Modification Request with CS Fallback indicator 7a. Suspend (see 23.060) 8. Update bearer(s) SGSN 7b. Suspend Request / Response 11. Routing Area Update or Combined RA/LA Update 3b, 3c. RRC connection release If the MSC is changed 1c. S1-AP UE Context Modification Response message 9. CM Service Request 9. A/Iu-cs message (with CM Service Request) 1d. MO CSFB Indication Ref: 3GPP 23.272 V12.3.0
Basic CSFB MT Call Flow 14/27 Ref:
Ref: Huawei 15/27
Ref: Huawei 16/27
Mobile Terminating call in idle mode 17/27 1. IAM 3. IAM 4. Paging Request 5. Paging 6. Paging 2. SRI procedure in TS 23.018 G-MSCeNodeB RNC/BSCUE MME HSS MSC VLR 8. After the UE context setup the procedure continues as described the active mode mobile terminated call procedures described in Clause 7.3 and 7.4. If the eNodeB knows that PS HO is supported the procedure in clause 7.3 “Mobile Terminating call in Active Mode - PS HO supported” may be applied from step 2, in Clause 7.3, and onwards If the eNodeB knows that PS HO is not supported the procedure in clause 7.4 “Mobile Terminating call in Active Mode – No PS HO support” shall be applied from step 2 in Clause 7.4, and onwards 7a. Extended Service Request 7b. Initial UE Context Setup 7a. Service Request Ref: 3GPP 23.272 V12.3.0
Mobile Terminating call in Active Mode - PS HO supported 18/27 4a. Location Area Update 4b. Paging Response 4b. A/Iu-cs message (with Paging Response) 5b. Signalling Connection Release 5b. Connection Reject If the MSC is changed 5b. Location Area Update or Combined RA/LA Update 5c. CS call establishment procedure 6. PS HO as specified in 23.401 [2] (continuation of execution phase) 5a. Establish CS connection Option 1: MSC is not changed 3c. Update Bearer(s) 3b. Suspend P-GW/ GGSN 2. Optional Measurement Report Solicitation 3a. PS HO as specified in 23.401 [2] (preparation phase and start of execution phase) 1e. S1-AP UE Context Modification Response message 1d. S1-AP UE Context Modification Request with CS Fallback indicator UE/MS MMEBSS/RNS MSCeNodeB SGSN Serving GW 1b. NAS Extended Service Request 1a. Paging Request 1a. CS SERVICE NOTIFICATION 1c. CS Paging Reject 1a. Service Request Ref: 3GPP 23.272 V12.3.0
Mobile Terminating call in Active Mode - No PS HO support 19/27 IF THE MSC IS CHANGED UE/MS MME MSC 3a. CCO/NACC, 3b, 3c. Signalling connection release eNodeB 2. Optional Measurement Report 9. Paging Response 9c. Location Area Update or Combined RA/LA Update 9b. Signalling Connection Release S-GW/PGW 1b. NAS Extended Service Request 1d. S1-AP UE Context Modification Request with CS Fallback indicator 1c. CS Paging Reject 7a. Suspend (see TS 23.060) 8. Update bearer(s) 7b. Suspend Request / Response 9b. CONNECTION REJECT 1A. CS SERVICE NOTIFICATION 1A. PAGING REQUEST SGSN 6.UE changes RAT then, LAU OR RA UPDATE OR LAU AND RAU 5. S1 UE CONTEXT RELEASE BSS/RNS 4. S1-AP: S1 UE CONTEXT RELEASE REQUEST 1A. SERVICE REQUEST 1e. S1-AP UE Context Modification Response message 9a. Establish CS connection Ref: 3GPP 23.272 V12.3.0
20/27 Ref:
Ref: ...etc 21/27
22/27 Ref:
Roaming Retry for CS fallback 23/27 GMSC HLR Old VMSC/VLR New VMSC/VLR MS PRN (call ref.,GMSC@, Roaming retry) 2 PRN ACK (MSRN) SRI ACK IAM (MSRN) Paging LocUpdate Authentication Procedure Update Location Cancel Location 3 Cancel Location Ack RCH (call reference, roaming retry) Insert Subscriber Data (multiple) Insert Subscriber Data (continued) Update Location Ack Further procedures related to location update. e.g. ciphering, TMSI reallocation.PRN New VMSC/VLR may delay setup until location update procedure finishes 8 PRN ACK (MSRN) 7 LocUpdate Accept TMSI Reallocation Complete Normal MT call procedure follows Old MSC stops paging timer and inform GMSC 2nd SRI ACK (MSRN) 7 2nd SRI (B, basic call interrogation) 5 REL RLCs 4 ACK HLR delays the sending of PRN until location update procedure finishes 6 SAE/LTE CSFallback Setup SRI (B, GMSC@,call Ref.,Roamingretry) 1 IAM (MSRN) Call Confirmed Ref: 3GPP 23.272 V12.3.0
Roaming Forwarding for CS fallback 24/27 GMSC HLR Old MSC/VLR New MSC/VLR MS SRI (B) PRN PRN ACK (MSRN)SRI ACK IAM (MSRN) Paging Location Update 2. Update Location (MTRF supported)1 3. Cancel Location (MTRF Supported And Authorized, New MSC/VLR numbers) Cancel Location Ack 6. PRN (MTRF indication, Old MSC number, last used LTE PLMN) Insert Subscriber Data (multiple) Insert Subscriber Data (continued) Update Location Ack Further procedures related to location update. E.g. ciphering, IMEI checking, TMSI reallocation. 10. New VMSC/VLR delays setup until location update procedure finishes. 8. PRN Resp (MSRN’) 9. IAM (MSRN’) Location Update Accept TMSI Realloc Complete Setup Call Confirmed Normal MT call procedure follows 4. Old MSC stops paging timer 7. After Update Location Ack is received, the new VLR returns MSRN’ to the old VLR. 5. If HLR authorises MTRF then use new MSC/VLR numbers to trigger sending of PRN Req 1. Send Identification (MTRF supported, New MSC/VLR numbers) CSFB Ref: 3GPP 23.272 V12.3.0
1x RTT CS Pre-Registration over EPS Procedure 25/27 1xCS CSFB UE E- UTRAN MME 1xCS IWS 1xRTT MSC 4. 1xRTT CS registration request 4a. UL/DL Information Transfer 4b. UL/DL S1 cdma2000 Tunnelling 4c. S102 Direct Transfer 6. 1xRTT CS registration response 6c. UL/DL Information Transfer 6b UL/DL S1 cdma2000 Tunnelling 6a. S102 Direct Transfer 1. UE attaches to E-UTRAN as specified in TS 23.401 5. Location update to 1xRTT CS domain 2. Decision to register with 1xRTT CS 3. Service Request procedure if the UE is in idle state . Ref: 3GPP 23.272 V12.3.0
CS MO call using fallback to CDMA 1x RTT network 26/27 1xCS CSFB UE E- UTRAN MME 1xCS IWS 1xRTT MSC 1. UE is E -UTRAN attached and registered with 1xRTT CS 11. 1x MO call establishment per 3GPP2 specifications 4. UE Context Modification Request 3. Extended Service Request S-GW/ P-GW 5. Optional measurement report solicitation 7. S1 UE Context Release Request 8. Suspend Notification 10. UE Context Release 2. UE decision to perform MO call in 1xCS 6. E-UTRAN triggers RRC connection release with redirection 4. UE Context Modification Response 9. Suspend Acknowledge Ref: 3GPP 23.272 V12.3.0
CS MT call using fallback to CDMA 1x RTT network 27/27 Ref: 3GPP 23.272 V12.3.0
Ad

Recommended

IMS + VoLTE Overview
IMS + VoLTE OverviewIMS + VoLTE Overview
IMS + VoLTE Overview
Hamidreza Bolhasani
 
Packet core network basics
Packet core network basicsPacket core network basics
Packet core network basics
Mustafa Golam
 
2 g training optimization
2 g training optimization2 g training optimization
2 g training optimization
Ahmed Gad
 
2G / 3G / 4G / IMS / 5G Overview with Focus on Core Network
2G / 3G / 4G / IMS / 5G Overview with Focus on Core Network2G / 3G / 4G / IMS / 5G Overview with Focus on Core Network
2G / 3G / 4G / IMS / 5G Overview with Focus on Core Network
Hamidreza Bolhasani
 
Best practices-lte-call-flow-guide
Best practices-lte-call-flow-guideBest practices-lte-call-flow-guide
Best practices-lte-call-flow-guide
Morg
 
Cs fallback feature
Cs fallback featureCs fallback feature
Cs fallback feature
Achmad Salsabil
 
Sip Detailed , Call flows , Architecture descriptions , SIP services , sip se...
Sip Detailed , Call flows , Architecture descriptions , SIP services , sip se...Sip Detailed , Call flows , Architecture descriptions , SIP services , sip se...
Sip Detailed , Call flows , Architecture descriptions , SIP services , sip se...
ALTANAI BISHT
 
MSC(-S) R12 configuration (2).pdf
MSC(-S) R12 configuration (2).pdfMSC(-S) R12 configuration (2).pdf
MSC(-S) R12 configuration (2).pdf
ssuseraab3a8
 
190937694 csfb-call-flows
190937694 csfb-call-flows190937694 csfb-call-flows
190937694 csfb-call-flows
amakRF
 
3 g call flow
3 g call flow3 g call flow
3 g call flow
Ashish Aggarwal
 
Basic GSM Call Flows
Basic GSM Call FlowsBasic GSM Call Flows
Basic GSM Call Flows
emyl97
 
TEMS PARAMETER (3G)
TEMS PARAMETER (3G)TEMS PARAMETER (3G)
TEMS PARAMETER (3G)
Md Joynal Abaden
 
GSM CALL FLOW
GSM CALL FLOWGSM CALL FLOW
GSM CALL FLOW
SugamTripathi1
 
Simplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice CallSimplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice Call
3G4G
 
Cs fall back
Cs fall backCs fall back
Cs fall back
Muhammad Shehzad Ashraf
 
Lte principle
Lte principleLte principle
Lte principle
Hatim100
 
Sdcch
SdcchSdcch
Sdcch
Deepak Sharma
 
VoLTE Flows and CS network
VoLTE Flows and CS networkVoLTE Flows and CS network
VoLTE Flows and CS network
Karel Berkovec
 
Layer 3 messages
Layer 3 messagesLayer 3 messages
Layer 3 messages
John Samir
 
ims registration call flow procedure volte sip
ims registration call flow procedure volte sipims registration call flow procedure volte sip
ims registration call flow procedure volte sip
Vikas Shokeen
 
Csfb (circuit switch fall back)
Csfb (circuit switch fall back)Csfb (circuit switch fall back)
Csfb (circuit switch fall back)
Rishi Mahajan
 
Gsm architecture and call flow
Gsm architecture and call flowGsm architecture and call flow
Gsm architecture and call flow
Mohd Nazir Shakeel
 
Call flows
Call flowsCall flows
Call flows
Shweta Kumar PMP, ACC, CSM, CSPO
 
Lte irat-troubleshooting-guide
Lte irat-troubleshooting-guideLte irat-troubleshooting-guide
Lte irat-troubleshooting-guide
Denmark Wilson
 
Sdcch drop rate
Sdcch drop rateSdcch drop rate
Sdcch drop rate
Terra Sacrifice
 
huawei-lte-kpi-ref
huawei-lte-kpi-refhuawei-lte-kpi-ref
huawei-lte-kpi-ref
Abd Yehia
 
Umts Kpi
Umts KpiUmts Kpi
Umts Kpi
Kishore Kandi
 
CS-Core Mobile Network (General)
CS-Core Mobile Network (General)CS-Core Mobile Network (General)
CS-Core Mobile Network (General)
Hamidreza Bolhasani
 
Huawei - Access failures troubleshooting work shop
Huawei - Access failures troubleshooting work shopHuawei - Access failures troubleshooting work shop
Huawei - Access failures troubleshooting work shop
navaidkhan
 
Umts call-flow-scenarios overview
Umts call-flow-scenarios overviewUmts call-flow-scenarios overview
Umts call-flow-scenarios overview
aritra321
 

More Related Content

What's hot (20)

190937694 csfb-call-flows
190937694 csfb-call-flows190937694 csfb-call-flows
190937694 csfb-call-flows
amakRF
 
3 g call flow
3 g call flow3 g call flow
3 g call flow
Ashish Aggarwal
 
Basic GSM Call Flows
Basic GSM Call FlowsBasic GSM Call Flows
Basic GSM Call Flows
emyl97
 
TEMS PARAMETER (3G)
TEMS PARAMETER (3G)TEMS PARAMETER (3G)
TEMS PARAMETER (3G)
Md Joynal Abaden
 
GSM CALL FLOW
GSM CALL FLOWGSM CALL FLOW
GSM CALL FLOW
SugamTripathi1
 
Simplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice CallSimplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice Call
3G4G
 
Cs fall back
Cs fall backCs fall back
Cs fall back
Muhammad Shehzad Ashraf
 
Lte principle
Lte principleLte principle
Lte principle
Hatim100
 
Sdcch
SdcchSdcch
Sdcch
Deepak Sharma
 
VoLTE Flows and CS network
VoLTE Flows and CS networkVoLTE Flows and CS network
VoLTE Flows and CS network
Karel Berkovec
 
Layer 3 messages
Layer 3 messagesLayer 3 messages
Layer 3 messages
John Samir
 
ims registration call flow procedure volte sip
ims registration call flow procedure volte sipims registration call flow procedure volte sip
ims registration call flow procedure volte sip
Vikas Shokeen
 
Csfb (circuit switch fall back)
Csfb (circuit switch fall back)Csfb (circuit switch fall back)
Csfb (circuit switch fall back)
Rishi Mahajan
 
Gsm architecture and call flow
Gsm architecture and call flowGsm architecture and call flow
Gsm architecture and call flow
Mohd Nazir Shakeel
 
Call flows
Call flowsCall flows
Call flows
Shweta Kumar PMP, ACC, CSM, CSPO
 
Lte irat-troubleshooting-guide
Lte irat-troubleshooting-guideLte irat-troubleshooting-guide
Lte irat-troubleshooting-guide
Denmark Wilson
 
Sdcch drop rate
Sdcch drop rateSdcch drop rate
Sdcch drop rate
Terra Sacrifice
 
huawei-lte-kpi-ref
huawei-lte-kpi-refhuawei-lte-kpi-ref
huawei-lte-kpi-ref
Abd Yehia
 
Umts Kpi
Umts KpiUmts Kpi
Umts Kpi
Kishore Kandi
 
CS-Core Mobile Network (General)
CS-Core Mobile Network (General)CS-Core Mobile Network (General)
CS-Core Mobile Network (General)
Hamidreza Bolhasani
 
190937694 csfb-call-flows
190937694 csfb-call-flows190937694 csfb-call-flows
190937694 csfb-call-flows
amakRF
 
3 g call flow
3 g call flow3 g call flow
3 g call flow
Ashish Aggarwal
 
Basic GSM Call Flows
Basic GSM Call FlowsBasic GSM Call Flows
Basic GSM Call Flows
emyl97
 
TEMS PARAMETER (3G)
TEMS PARAMETER (3G)TEMS PARAMETER (3G)
TEMS PARAMETER (3G)
Md Joynal Abaden
 
GSM CALL FLOW
GSM CALL FLOWGSM CALL FLOW
GSM CALL FLOW
SugamTripathi1
 
Simplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice CallSimplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice Call
3G4G
 
Cs fall back
Cs fall backCs fall back
Cs fall back
Muhammad Shehzad Ashraf
 
Lte principle
Lte principleLte principle
Lte principle
Hatim100
 
Sdcch
SdcchSdcch
Sdcch
Deepak Sharma
 
VoLTE Flows and CS network
VoLTE Flows and CS networkVoLTE Flows and CS network
VoLTE Flows and CS network
Karel Berkovec
 
Layer 3 messages
Layer 3 messagesLayer 3 messages
Layer 3 messages
John Samir
 
ims registration call flow procedure volte sip
ims registration call flow procedure volte sipims registration call flow procedure volte sip
ims registration call flow procedure volte sip
Vikas Shokeen
 
Csfb (circuit switch fall back)
Csfb (circuit switch fall back)Csfb (circuit switch fall back)
Csfb (circuit switch fall back)
Rishi Mahajan
 
Gsm architecture and call flow
Gsm architecture and call flowGsm architecture and call flow
Gsm architecture and call flow
Mohd Nazir Shakeel
 
Call flows
Call flowsCall flows
Call flows
Shweta Kumar PMP, ACC, CSM, CSPO
 
Lte irat-troubleshooting-guide
Lte irat-troubleshooting-guideLte irat-troubleshooting-guide
Lte irat-troubleshooting-guide
Denmark Wilson
 
Sdcch drop rate
Sdcch drop rateSdcch drop rate
Sdcch drop rate
Terra Sacrifice
 
huawei-lte-kpi-ref
huawei-lte-kpi-refhuawei-lte-kpi-ref
huawei-lte-kpi-ref
Abd Yehia
 
Umts Kpi
Umts KpiUmts Kpi
Umts Kpi
Kishore Kandi
 
CS-Core Mobile Network (General)
CS-Core Mobile Network (General)CS-Core Mobile Network (General)
CS-Core Mobile Network (General)
Hamidreza Bolhasani
 

Viewers also liked (12)

Huawei - Access failures troubleshooting work shop
Huawei - Access failures troubleshooting work shopHuawei - Access failures troubleshooting work shop
Huawei - Access failures troubleshooting work shop
navaidkhan
 
Umts call-flow-scenarios overview
Umts call-flow-scenarios overviewUmts call-flow-scenarios overview
Umts call-flow-scenarios overview
aritra321
 
Elementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPP
Elementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPPElementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPP
Elementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPP
Louis K. H. Kuo
 
An overview of D2D in 3GPP LTE standard
An overview of D2D in 3GPP LTE standardAn overview of D2D in 3GPP LTE standard
An overview of D2D in 3GPP LTE standard
ssk
 
VoWLAN: Call Quality
VoWLAN: Call QualityVoWLAN: Call Quality
VoWLAN: Call Quality
3G4G
 
5G Crosshaul vs 5G-XHaul
5G Crosshaul vs 5G-XHaul5G Crosshaul vs 5G-XHaul
5G Crosshaul vs 5G-XHaul
3G4G
 
Overview 5G Architecture Options from Deutsche Telekom
Overview 5G Architecture Options from Deutsche TelekomOverview 5G Architecture Options from Deutsche Telekom
Overview 5G Architecture Options from Deutsche Telekom
Eiko Seidel
 
AT&T View on LTE to 5G Network Migration
AT&T View on LTE to 5G Network Migration AT&T View on LTE to 5G Network Migration
AT&T View on LTE to 5G Network Migration
Eiko Seidel
 
Call flow and MS attach in LTE
Call flow and MS attach in LTECall flow and MS attach in LTE
Call flow and MS attach in LTE
Shashank Asthana
 
Lte system signaling procedures
Lte system signaling proceduresLte system signaling procedures
Lte system signaling procedures
tharinduwije
 
Radio Frequency, Band and Spectrum
Radio Frequency, Band and SpectrumRadio Frequency, Band and Spectrum
Radio Frequency, Band and Spectrum
3G4G
 
2G/3G Switch off Dates
2G/3G Switch off Dates2G/3G Switch off Dates
2G/3G Switch off Dates
3G4G
 
Huawei - Access failures troubleshooting work shop
Huawei - Access failures troubleshooting work shopHuawei - Access failures troubleshooting work shop
Huawei - Access failures troubleshooting work shop
navaidkhan
 
Umts call-flow-scenarios overview
Umts call-flow-scenarios overviewUmts call-flow-scenarios overview
Umts call-flow-scenarios overview
aritra321
 
Elementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPP
Elementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPPElementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPP
Elementary procedures for Circuit-Switched (CS) Call Control (CC) in 3GPP
Louis K. H. Kuo
 
An overview of D2D in 3GPP LTE standard
An overview of D2D in 3GPP LTE standardAn overview of D2D in 3GPP LTE standard
An overview of D2D in 3GPP LTE standard
ssk
 
VoWLAN: Call Quality
VoWLAN: Call QualityVoWLAN: Call Quality
VoWLAN: Call Quality
3G4G
 
5G Crosshaul vs 5G-XHaul
5G Crosshaul vs 5G-XHaul5G Crosshaul vs 5G-XHaul
5G Crosshaul vs 5G-XHaul
3G4G
 
Overview 5G Architecture Options from Deutsche Telekom
Overview 5G Architecture Options from Deutsche TelekomOverview 5G Architecture Options from Deutsche Telekom
Overview 5G Architecture Options from Deutsche Telekom
Eiko Seidel
 
AT&T View on LTE to 5G Network Migration
AT&T View on LTE to 5G Network Migration AT&T View on LTE to 5G Network Migration
AT&T View on LTE to 5G Network Migration
Eiko Seidel
 
Call flow and MS attach in LTE
Call flow and MS attach in LTECall flow and MS attach in LTE
Call flow and MS attach in LTE
Shashank Asthana
 
Lte system signaling procedures
Lte system signaling proceduresLte system signaling procedures
Lte system signaling procedures
tharinduwije
 
Radio Frequency, Band and Spectrum
Radio Frequency, Band and SpectrumRadio Frequency, Band and Spectrum
Radio Frequency, Band and Spectrum
3G4G
 
2G/3G Switch off Dates
2G/3G Switch off Dates2G/3G Switch off Dates
2G/3G Switch off Dates
3G4G
 
Ad

Similar to UMTS/LTE/EPC Call Flows for CSFB (20)

LTE Call Flow Procedures ,Intra LTE HO procedure
LTE Call Flow Procedures ,Intra LTE HO procedureLTE Call Flow Procedures ,Intra LTE HO procedure
LTE Call Flow Procedures ,Intra LTE HO procedure
HarishkumarM34
 
C22 20090615-030 via csfb support
C22 20090615-030 via csfb supportC22 20090615-030 via csfb support
C22 20090615-030 via csfb support
karthick2007
 
lte-to-3g-circuit-switched-fall-back.pdf
lte-to-3g-circuit-switched-fall-back.pdflte-to-3g-circuit-switched-fall-back.pdf
lte-to-3g-circuit-switched-fall-back.pdf
Arbab Husain
 
Circuit switched fallback
Circuit switched fallbackCircuit switched fallback
Circuit switched fallback
Subhash Kumar
 
Signalling in EPC/LTE
Signalling in EPC/LTESignalling in EPC/LTE
Signalling in EPC/LTE
Leliwa
 
43779871hgu-LTE-Voice-Call-Handover.pptx
43779871hgu-LTE-Voice-Call-Handover.pptx43779871hgu-LTE-Voice-Call-Handover.pptx
43779871hgu-LTE-Voice-Call-Handover.pptx
banazjalil59
 
CS Services in LTE
CS Services in LTECS Services in LTE
CS Services in LTE
Darshan Patil
 
Future-of-Voice-.pptx
Future-of-Voice-.pptxFuture-of-Voice-.pptx
Future-of-Voice-.pptx
SandeepSingh1838
 
Lte call flows_att_best_practices_lte_pe
Lte call flows_att_best_practices_lte_peLte call flows_att_best_practices_lte_pe
Lte call flows_att_best_practices_lte_pe
Hatim100
 
Call Forwarding
Call ForwardingCall Forwarding
Call Forwarding
Akash Agrawal
 
Csfb
CsfbCsfb
Csfb
Prashant Sengar
 
259711021-LTE-Training.pptx
259711021-LTE-Training.pptx259711021-LTE-Training.pptx
259711021-LTE-Training.pptx
ssuser6f5356
 
11_CSFB call flow_II.....................
11_CSFB call flow_II.....................11_CSFB call flow_II.....................
11_CSFB call flow_II.....................
SandeepSha3
 
Wcdma callflow
Wcdma callflowWcdma callflow
Wcdma callflow
nayanangshu
 
Callflows 121002232008-phpapp01
Callflows 121002232008-phpapp01Callflows 121002232008-phpapp01
Callflows 121002232008-phpapp01
Abiy Almaw
 
Call processing and handover.eng
Call processing and handover.engCall processing and handover.eng
Call processing and handover.eng
Neelabh Krishna
 
Chap 4. call processing and handover.eng
Chap 4. call processing and handover.engChap 4. call processing and handover.eng
Chap 4. call processing and handover.eng
sivakumar D
 
LTE Call Processing and Handover
LTE Call Processing and HandoverLTE Call Processing and Handover
LTE Call Processing and Handover
Sitha Sok
 
Overview 3GPP NR Physical Layer
Overview 3GPP NR Physical LayerOverview 3GPP NR Physical Layer
Overview 3GPP NR Physical Layer
Eiko Seidel
 
20121129 lte basic procedures (2)
20121129 lte basic procedures (2)20121129 lte basic procedures (2)
20121129 lte basic procedures (2)
Debasish Sahoo
 
LTE Call Flow Procedures ,Intra LTE HO procedure
LTE Call Flow Procedures ,Intra LTE HO procedureLTE Call Flow Procedures ,Intra LTE HO procedure
LTE Call Flow Procedures ,Intra LTE HO procedure
HarishkumarM34
 
C22 20090615-030 via csfb support
C22 20090615-030 via csfb supportC22 20090615-030 via csfb support
C22 20090615-030 via csfb support
karthick2007
 
lte-to-3g-circuit-switched-fall-back.pdf
lte-to-3g-circuit-switched-fall-back.pdflte-to-3g-circuit-switched-fall-back.pdf
lte-to-3g-circuit-switched-fall-back.pdf
Arbab Husain
 
Circuit switched fallback
Circuit switched fallbackCircuit switched fallback
Circuit switched fallback
Subhash Kumar
 
Signalling in EPC/LTE
Signalling in EPC/LTESignalling in EPC/LTE
Signalling in EPC/LTE
Leliwa
 
43779871hgu-LTE-Voice-Call-Handover.pptx
43779871hgu-LTE-Voice-Call-Handover.pptx43779871hgu-LTE-Voice-Call-Handover.pptx
43779871hgu-LTE-Voice-Call-Handover.pptx
banazjalil59
 
CS Services in LTE
CS Services in LTECS Services in LTE
CS Services in LTE
Darshan Patil
 
Future-of-Voice-.pptx
Future-of-Voice-.pptxFuture-of-Voice-.pptx
Future-of-Voice-.pptx
SandeepSingh1838
 
Lte call flows_att_best_practices_lte_pe
Lte call flows_att_best_practices_lte_peLte call flows_att_best_practices_lte_pe
Lte call flows_att_best_practices_lte_pe
Hatim100
 
Call Forwarding
Call ForwardingCall Forwarding
Call Forwarding
Akash Agrawal
 
Csfb
CsfbCsfb
Csfb
Prashant Sengar
 
259711021-LTE-Training.pptx
259711021-LTE-Training.pptx259711021-LTE-Training.pptx
259711021-LTE-Training.pptx
ssuser6f5356
 
11_CSFB call flow_II.....................
11_CSFB call flow_II.....................11_CSFB call flow_II.....................
11_CSFB call flow_II.....................
SandeepSha3
 
Wcdma callflow
Wcdma callflowWcdma callflow
Wcdma callflow
nayanangshu
 
Callflows 121002232008-phpapp01
Callflows 121002232008-phpapp01Callflows 121002232008-phpapp01
Callflows 121002232008-phpapp01
Abiy Almaw
 
Call processing and handover.eng
Call processing and handover.engCall processing and handover.eng
Call processing and handover.eng
Neelabh Krishna
 
Chap 4. call processing and handover.eng
Chap 4. call processing and handover.engChap 4. call processing and handover.eng
Chap 4. call processing and handover.eng
sivakumar D
 
LTE Call Processing and Handover
LTE Call Processing and HandoverLTE Call Processing and Handover
LTE Call Processing and Handover
Sitha Sok
 
Overview 3GPP NR Physical Layer
Overview 3GPP NR Physical LayerOverview 3GPP NR Physical Layer
Overview 3GPP NR Physical Layer
Eiko Seidel
 
20121129 lte basic procedures (2)
20121129 lte basic procedures (2)20121129 lte basic procedures (2)
20121129 lte basic procedures (2)
Debasish Sahoo
 
Ad

More from Justin MA (馬嘉昌) (12)

電信顧問的特質與基本技能
電信顧問的特質與基本技能電信顧問的特質與基本技能
電信顧問的特質與基本技能
Justin MA (馬嘉昌)
 
To Calculate the Maximum LOS Coverage
To Calculate the Maximum LOS CoverageTo Calculate the Maximum LOS Coverage
To Calculate the Maximum LOS Coverage
Justin MA (馬嘉昌)
 
UMTS/WCDMA Mobile/UE Geolocation
UMTS/WCDMA Mobile/UE GeolocationUMTS/WCDMA Mobile/UE Geolocation
UMTS/WCDMA Mobile/UE Geolocation
Justin MA (馬嘉昌)
 
UMTS/HSPA Mobile Measurements in Air/Uu
UMTS/HSPA Mobile Measurements in Air/UuUMTS/HSPA Mobile Measurements in Air/Uu
UMTS/HSPA Mobile Measurements in Air/Uu
Justin MA (馬嘉昌)
 
UMTS/WCDMA Mobile Measurements in Air/Uu
UMTS/WCDMA Mobile Measurements in Air/UuUMTS/WCDMA Mobile Measurements in Air/Uu
UMTS/WCDMA Mobile Measurements in Air/Uu
Justin MA (馬嘉昌)
 
LTE Mobile Measurements in Air/eUu interface
LTE Mobile Measurements in Air/eUu interfaceLTE Mobile Measurements in Air/eUu interface
LTE Mobile Measurements in Air/eUu interface
Justin MA (馬嘉昌)
 
UMTS/LTE/EPC Call Flows for Handovers
UMTS/LTE/EPC Call Flows for HandoversUMTS/LTE/EPC Call Flows for Handovers
UMTS/LTE/EPC Call Flows for Handovers
Justin MA (馬嘉昌)
 
UMTS/LTE/EPC Basic Call Flows
UMTS/LTE/EPC Basic Call FlowsUMTS/LTE/EPC Basic Call Flows
UMTS/LTE/EPC Basic Call Flows
Justin MA (馬嘉昌)
 
UMTS/WCDMA Call Flows for Handovers
UMTS/WCDMA Call Flows for HandoversUMTS/WCDMA Call Flows for Handovers
UMTS/WCDMA Call Flows for Handovers
Justin MA (馬嘉昌)
 
UMTS/WCDMA Call Flows for PS services
UMTS/WCDMA Call Flows for PS servicesUMTS/WCDMA Call Flows for PS services
UMTS/WCDMA Call Flows for PS services
Justin MA (馬嘉昌)
 
UMTS/WCDMA Call Flows for CS services
UMTS/WCDMA Call Flows for CS servicesUMTS/WCDMA Call Flows for CS services
UMTS/WCDMA Call Flows for CS services
Justin MA (馬嘉昌)
 
LTE RF Planning Tool - Atoll
LTE RF Planning Tool - AtollLTE RF Planning Tool - Atoll
LTE RF Planning Tool - Atoll
Justin MA (馬嘉昌)
 
電信顧問的特質與基本技能
電信顧問的特質與基本技能電信顧問的特質與基本技能
電信顧問的特質與基本技能
Justin MA (馬嘉昌)
 
To Calculate the Maximum LOS Coverage
To Calculate the Maximum LOS CoverageTo Calculate the Maximum LOS Coverage
To Calculate the Maximum LOS Coverage
Justin MA (馬嘉昌)
 
UMTS/WCDMA Mobile/UE Geolocation
UMTS/WCDMA Mobile/UE GeolocationUMTS/WCDMA Mobile/UE Geolocation
UMTS/WCDMA Mobile/UE Geolocation
Justin MA (馬嘉昌)
 
UMTS/HSPA Mobile Measurements in Air/Uu
UMTS/HSPA Mobile Measurements in Air/UuUMTS/HSPA Mobile Measurements in Air/Uu
UMTS/HSPA Mobile Measurements in Air/Uu
Justin MA (馬嘉昌)
 
UMTS/WCDMA Mobile Measurements in Air/Uu
UMTS/WCDMA Mobile Measurements in Air/UuUMTS/WCDMA Mobile Measurements in Air/Uu
UMTS/WCDMA Mobile Measurements in Air/Uu
Justin MA (馬嘉昌)
 
LTE Mobile Measurements in Air/eUu interface
LTE Mobile Measurements in Air/eUu interfaceLTE Mobile Measurements in Air/eUu interface
LTE Mobile Measurements in Air/eUu interface
Justin MA (馬嘉昌)
 
UMTS/LTE/EPC Call Flows for Handovers
UMTS/LTE/EPC Call Flows for HandoversUMTS/LTE/EPC Call Flows for Handovers
UMTS/LTE/EPC Call Flows for Handovers
Justin MA (馬嘉昌)
 
UMTS/LTE/EPC Basic Call Flows
UMTS/LTE/EPC Basic Call FlowsUMTS/LTE/EPC Basic Call Flows
UMTS/LTE/EPC Basic Call Flows
Justin MA (馬嘉昌)
 
UMTS/WCDMA Call Flows for Handovers
UMTS/WCDMA Call Flows for HandoversUMTS/WCDMA Call Flows for Handovers
UMTS/WCDMA Call Flows for Handovers
Justin MA (馬嘉昌)
 
UMTS/WCDMA Call Flows for PS services
UMTS/WCDMA Call Flows for PS servicesUMTS/WCDMA Call Flows for PS services
UMTS/WCDMA Call Flows for PS services
Justin MA (馬嘉昌)
 
UMTS/WCDMA Call Flows for CS services
UMTS/WCDMA Call Flows for CS servicesUMTS/WCDMA Call Flows for CS services
UMTS/WCDMA Call Flows for CS services
Justin MA (馬嘉昌)
 
LTE RF Planning Tool - Atoll
LTE RF Planning Tool - AtollLTE RF Planning Tool - Atoll
LTE RF Planning Tool - Atoll
Justin MA (馬嘉昌)
 

Recently uploaded (20)

New Ways to Reduce Database Costs with ScyllaDB
New Ways to Reduce Database Costs with ScyllaDBNew Ways to Reduce Database Costs with ScyllaDB
New Ways to Reduce Database Costs with ScyllaDB
ScyllaDB
 
Improving Developer Productivity With DORA, SPACE, and DevEx
Improving Developer Productivity With DORA, SPACE, and DevExImproving Developer Productivity With DORA, SPACE, and DevEx
Improving Developer Productivity With DORA, SPACE, and DevEx
Justin Reock
 
Securiport - A Border Security Company
Securiport - A Border Security CompanySecuriport - A Border Security Company
Securiport - A Border Security Company
Securiport
 
ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....
ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....
ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....
Jasper Oosterveld
 
Maxx nft market place new generation nft marketing place
Maxx nft market place new generation nft marketing placeMaxx nft market place new generation nft marketing place
Maxx nft market place new generation nft marketing place
usersalmanrazdelhi
 
Droidal: AI Agents Revolutionizing Healthcare
Droidal: AI Agents Revolutionizing HealthcareDroidal: AI Agents Revolutionizing Healthcare
Droidal: AI Agents Revolutionizing Healthcare
Droidal LLC
 
Dev Dives: System-to-system integration with UiPath API Workflows
Dev Dives: System-to-system integration with UiPath API WorkflowsDev Dives: System-to-system integration with UiPath API Workflows
Dev Dives: System-to-system integration with UiPath API Workflows
UiPathCommunity
 
Introducing the OSA 3200 SP and OSA 3250 ePRC
Introducing the OSA 3200 SP and OSA 3250 ePRCIntroducing the OSA 3200 SP and OSA 3250 ePRC
Introducing the OSA 3200 SP and OSA 3250 ePRC
Adtran
 
UiPath Community Zurich: Release Management and Build Pipelines
UiPath Community Zurich: Release Management and Build PipelinesUiPath Community Zurich: Release Management and Build Pipelines
UiPath Community Zurich: Release Management and Build Pipelines
UiPathCommunity
 
Agentic AI - The New Era of Intelligence
Agentic AI - The New Era of IntelligenceAgentic AI - The New Era of Intelligence
Agentic AI - The New Era of Intelligence
Muzammil Shah
 
Gihbli AI and Geo sitution |use/misuse of Ai Technology
Gihbli AI and Geo sitution |use/misuse of Ai TechnologyGihbli AI and Geo sitution |use/misuse of Ai Technology
Gihbli AI and Geo sitution |use/misuse of Ai Technology
zainkhurram1111
 
STKI Israel Market Study 2025 final v1 version
STKI Israel Market Study 2025 final v1 versionSTKI Israel Market Study 2025 final v1 version
STKI Israel Market Study 2025 final v1 version
Dr. Jimmy Schwarzkopf
 
Supercharge Your AI Development with Local LLMs
Supercharge Your AI Development with Local LLMsSupercharge Your AI Development with Local LLMs
Supercharge Your AI Development with Local LLMs
Francesco Corti
 
6th Power Grid Model Meetup - 21 May 2025
6th Power Grid Model Meetup - 21 May 20256th Power Grid Model Meetup - 21 May 2025
6th Power Grid Model Meetup - 21 May 2025
DanBrown980551
 
Offshore IT Support: Balancing In-House and Offshore Help Desk Technicians
Offshore IT Support: Balancing In-House and Offshore Help Desk TechniciansOffshore IT Support: Balancing In-House and Offshore Help Desk Technicians
Offshore IT Support: Balancing In-House and Offshore Help Desk Technicians
john823664
 
TrustArc Webinar: Mastering Privacy Contracting
TrustArc Webinar: Mastering Privacy ContractingTrustArc Webinar: Mastering Privacy Contracting
TrustArc Webinar: Mastering Privacy Contracting
TrustArc
 
Let’s Get Slack Certified! 🚀- Slack Community
Let’s Get Slack Certified! 🚀- Slack CommunityLet’s Get Slack Certified! 🚀- Slack Community
Let’s Get Slack Certified! 🚀- Slack Community
SanjeetMishra29
 
AI Trends - Mary Meeker
AI Trends - Mary MeekerAI Trends - Mary Meeker
AI Trends - Mary Meeker
Razin Mustafiz
 
Microsoft Build 2025 takeaways in one presentation
Microsoft Build 2025 takeaways in one presentationMicrosoft Build 2025 takeaways in one presentation
Microsoft Build 2025 takeaways in one presentation
Digitalmara
 
End-to-end Assurance for SD-WAN & SASE with ThousandEyes
End-to-end Assurance for SD-WAN & SASE with ThousandEyesEnd-to-end Assurance for SD-WAN & SASE with ThousandEyes
End-to-end Assurance for SD-WAN & SASE with ThousandEyes
ThousandEyes
 
New Ways to Reduce Database Costs with ScyllaDB
New Ways to Reduce Database Costs with ScyllaDBNew Ways to Reduce Database Costs with ScyllaDB
New Ways to Reduce Database Costs with ScyllaDB
ScyllaDB
 
Improving Developer Productivity With DORA, SPACE, and DevEx
Improving Developer Productivity With DORA, SPACE, and DevExImproving Developer Productivity With DORA, SPACE, and DevEx
Improving Developer Productivity With DORA, SPACE, and DevEx
Justin Reock
 
Securiport - A Border Security Company
Securiport - A Border Security CompanySecuriport - A Border Security Company
Securiport - A Border Security Company
Securiport
 
ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....
ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....
ELNL2025 - Unlocking the Power of Sensitivity Labels - A Comprehensive Guide....
Jasper Oosterveld
 
Maxx nft market place new generation nft marketing place
Maxx nft market place new generation nft marketing placeMaxx nft market place new generation nft marketing place
Maxx nft market place new generation nft marketing place
usersalmanrazdelhi
 
Droidal: AI Agents Revolutionizing Healthcare
Droidal: AI Agents Revolutionizing HealthcareDroidal: AI Agents Revolutionizing Healthcare
Droidal: AI Agents Revolutionizing Healthcare
Droidal LLC
 
Dev Dives: System-to-system integration with UiPath API Workflows
Dev Dives: System-to-system integration with UiPath API WorkflowsDev Dives: System-to-system integration with UiPath API Workflows
Dev Dives: System-to-system integration with UiPath API Workflows
UiPathCommunity
 
Introducing the OSA 3200 SP and OSA 3250 ePRC
Introducing the OSA 3200 SP and OSA 3250 ePRCIntroducing the OSA 3200 SP and OSA 3250 ePRC
Introducing the OSA 3200 SP and OSA 3250 ePRC
Adtran
 
UiPath Community Zurich: Release Management and Build Pipelines
UiPath Community Zurich: Release Management and Build PipelinesUiPath Community Zurich: Release Management and Build Pipelines
UiPath Community Zurich: Release Management and Build Pipelines
UiPathCommunity
 
Agentic AI - The New Era of Intelligence
Agentic AI - The New Era of IntelligenceAgentic AI - The New Era of Intelligence
Agentic AI - The New Era of Intelligence
Muzammil Shah
 
Gihbli AI and Geo sitution |use/misuse of Ai Technology
Gihbli AI and Geo sitution |use/misuse of Ai TechnologyGihbli AI and Geo sitution |use/misuse of Ai Technology
Gihbli AI and Geo sitution |use/misuse of Ai Technology
zainkhurram1111
 
STKI Israel Market Study 2025 final v1 version
STKI Israel Market Study 2025 final v1 versionSTKI Israel Market Study 2025 final v1 version
STKI Israel Market Study 2025 final v1 version
Dr. Jimmy Schwarzkopf
 
Supercharge Your AI Development with Local LLMs
Supercharge Your AI Development with Local LLMsSupercharge Your AI Development with Local LLMs
Supercharge Your AI Development with Local LLMs
Francesco Corti
 
6th Power Grid Model Meetup - 21 May 2025
6th Power Grid Model Meetup - 21 May 20256th Power Grid Model Meetup - 21 May 2025
6th Power Grid Model Meetup - 21 May 2025
DanBrown980551
 
Offshore IT Support: Balancing In-House and Offshore Help Desk Technicians
Offshore IT Support: Balancing In-House and Offshore Help Desk TechniciansOffshore IT Support: Balancing In-House and Offshore Help Desk Technicians
Offshore IT Support: Balancing In-House and Offshore Help Desk Technicians
john823664
 
TrustArc Webinar: Mastering Privacy Contracting
TrustArc Webinar: Mastering Privacy ContractingTrustArc Webinar: Mastering Privacy Contracting
TrustArc Webinar: Mastering Privacy Contracting
TrustArc
 
Let’s Get Slack Certified! 🚀- Slack Community
Let’s Get Slack Certified! 🚀- Slack CommunityLet’s Get Slack Certified! 🚀- Slack Community
Let’s Get Slack Certified! 🚀- Slack Community
SanjeetMishra29
 
AI Trends - Mary Meeker
AI Trends - Mary MeekerAI Trends - Mary Meeker
AI Trends - Mary Meeker
Razin Mustafiz
 
Microsoft Build 2025 takeaways in one presentation
Microsoft Build 2025 takeaways in one presentationMicrosoft Build 2025 takeaways in one presentation
Microsoft Build 2025 takeaways in one presentation
Digitalmara
 
End-to-end Assurance for SD-WAN & SASE with ThousandEyes
End-to-end Assurance for SD-WAN & SASE with ThousandEyesEnd-to-end Assurance for SD-WAN & SASE with ThousandEyes
End-to-end Assurance for SD-WAN & SASE with ThousandEyes
ThousandEyes
 

UMTS/LTE/EPC Call Flows for CSFB

  • 1. LTE CSFB Call Flows Edited By Justin MA Created: June 2014 Updated: 2014_0714 Date and Version Author Change Note 2014_0630; v1.0 Justin MA Basic call flows 2014_0714; v1.1 Justin MA Call Release with IR LTE and SAE netwroks 1/27 Ref:
  • 4. General Voice over LTE solutions: 4/27 Ref:
  • 8. Attach Procedure for LTE/WCDMA modes 8/27 Ref: 3GPP 23.272 V12.3.0
  • 9. Basic CSFB MO Call Flow 9/27 Ref:
  • 12. Mobile Originating call in Active Mode - PS HO supported 12/27 UE/MS MMEBSS/RNS MSCeNodeB SGSN Serving GW 2. Optional Measurement Report Solicitation 4b. A/Iu-cs message (with CM Service Request) 4b. CM Service Request Location Area Update or Combined RA/LA Update 5. CM Service Reject 5. CM Service Reject If the MSC is changed 3a. PS HO as specified in 23.401 [2] (preparation phase and start of execution phase) 6. CS call establishment procedure 1a. Extended Service Request 1b. S1-AP Request message with CS Fallback indicator 7. PS HO as specified in 23.401 [2] (continuation of execution phase) 1c. S1-AP Response message 4a. Location Area Update 3c. Update Bearer(s) 3b. Suspend P-GW/ GGSN 1d. MO CSFB Indication Ref: 3GPP 23.272 V12.3.0
  • 13. Mobile Originating call in Active Mode – No PS HO support 13/27 UE/MS MMEBSS/RNS MSCeNodeB 2. Optional Measurement Report Solicitation 10b. Location Area Update 10a. Service Reject 10c. CS MO call 6. UE changes RAT then LA Update or RA Update or LAU and RAU 3a. NACC, 5. S1 UE Context Release 1a. NAS Extended Service Request SGW/PGW 4. S1-AP: S1 UE Context Release Request 1b. S1-AP UE Context Modification Request with CS Fallback indicator 7a. Suspend (see 23.060) 8. Update bearer(s) SGSN 7b. Suspend Request / Response 11. Routing Area Update or Combined RA/LA Update 3b, 3c. RRC connection release If the MSC is changed 1c. S1-AP UE Context Modification Response message 9. CM Service Request 9. A/Iu-cs message (with CM Service Request) 1d. MO CSFB Indication Ref: 3GPP 23.272 V12.3.0
  • 14. Basic CSFB MT Call Flow 14/27 Ref:
  • 17. Mobile Terminating call in idle mode 17/27 1. IAM 3. IAM 4. Paging Request 5. Paging 6. Paging 2. SRI procedure in TS 23.018 G-MSCeNodeB RNC/BSCUE MME HSS MSC VLR 8. After the UE context setup the procedure continues as described the active mode mobile terminated call procedures described in Clause 7.3 and 7.4. If the eNodeB knows that PS HO is supported the procedure in clause 7.3 “Mobile Terminating call in Active Mode - PS HO supported” may be applied from step 2, in Clause 7.3, and onwards If the eNodeB knows that PS HO is not supported the procedure in clause 7.4 “Mobile Terminating call in Active Mode – No PS HO support” shall be applied from step 2 in Clause 7.4, and onwards 7a. Extended Service Request 7b. Initial UE Context Setup 7a. Service Request Ref: 3GPP 23.272 V12.3.0
  • 18. Mobile Terminating call in Active Mode - PS HO supported 18/27 4a. Location Area Update 4b. Paging Response 4b. A/Iu-cs message (with Paging Response) 5b. Signalling Connection Release 5b. Connection Reject If the MSC is changed 5b. Location Area Update or Combined RA/LA Update 5c. CS call establishment procedure 6. PS HO as specified in 23.401 [2] (continuation of execution phase) 5a. Establish CS connection Option 1: MSC is not changed 3c. Update Bearer(s) 3b. Suspend P-GW/ GGSN 2. Optional Measurement Report Solicitation 3a. PS HO as specified in 23.401 [2] (preparation phase and start of execution phase) 1e. S1-AP UE Context Modification Response message 1d. S1-AP UE Context Modification Request with CS Fallback indicator UE/MS MMEBSS/RNS MSCeNodeB SGSN Serving GW 1b. NAS Extended Service Request 1a. Paging Request 1a. CS SERVICE NOTIFICATION 1c. CS Paging Reject 1a. Service Request Ref: 3GPP 23.272 V12.3.0
  • 19. Mobile Terminating call in Active Mode - No PS HO support 19/27 IF THE MSC IS CHANGED UE/MS MME MSC 3a. CCO/NACC, 3b, 3c. Signalling connection release eNodeB 2. Optional Measurement Report 9. Paging Response 9c. Location Area Update or Combined RA/LA Update 9b. Signalling Connection Release S-GW/PGW 1b. NAS Extended Service Request 1d. S1-AP UE Context Modification Request with CS Fallback indicator 1c. CS Paging Reject 7a. Suspend (see TS 23.060) 8. Update bearer(s) 7b. Suspend Request / Response 9b. CONNECTION REJECT 1A. CS SERVICE NOTIFICATION 1A. PAGING REQUEST SGSN 6.UE changes RAT then, LAU OR RA UPDATE OR LAU AND RAU 5. S1 UE CONTEXT RELEASE BSS/RNS 4. S1-AP: S1 UE CONTEXT RELEASE REQUEST 1A. SERVICE REQUEST 1e. S1-AP UE Context Modification Response message 9a. Establish CS connection Ref: 3GPP 23.272 V12.3.0
  • 23. Roaming Retry for CS fallback 23/27 GMSC HLR Old VMSC/VLR New VMSC/VLR MS PRN (call ref.,GMSC@, Roaming retry) 2 PRN ACK (MSRN) SRI ACK IAM (MSRN) Paging LocUpdate Authentication Procedure Update Location Cancel Location 3 Cancel Location Ack RCH (call reference, roaming retry) Insert Subscriber Data (multiple) Insert Subscriber Data (continued) Update Location Ack Further procedures related to location update. e.g. ciphering, TMSI reallocation.PRN New VMSC/VLR may delay setup until location update procedure finishes 8 PRN ACK (MSRN) 7 LocUpdate Accept TMSI Reallocation Complete Normal MT call procedure follows Old MSC stops paging timer and inform GMSC 2nd SRI ACK (MSRN) 7 2nd SRI (B, basic call interrogation) 5 REL RLCs 4 ACK HLR delays the sending of PRN until location update procedure finishes 6 SAE/LTE CSFallback Setup SRI (B, GMSC@,call Ref.,Roamingretry) 1 IAM (MSRN) Call Confirmed Ref: 3GPP 23.272 V12.3.0
  • 24. Roaming Forwarding for CS fallback 24/27 GMSC HLR Old MSC/VLR New MSC/VLR MS SRI (B) PRN PRN ACK (MSRN)SRI ACK IAM (MSRN) Paging Location Update 2. Update Location (MTRF supported)1 3. Cancel Location (MTRF Supported And Authorized, New MSC/VLR numbers) Cancel Location Ack 6. PRN (MTRF indication, Old MSC number, last used LTE PLMN) Insert Subscriber Data (multiple) Insert Subscriber Data (continued) Update Location Ack Further procedures related to location update. E.g. ciphering, IMEI checking, TMSI reallocation. 10. New VMSC/VLR delays setup until location update procedure finishes. 8. PRN Resp (MSRN’) 9. IAM (MSRN’) Location Update Accept TMSI Realloc Complete Setup Call Confirmed Normal MT call procedure follows 4. Old MSC stops paging timer 7. After Update Location Ack is received, the new VLR returns MSRN’ to the old VLR. 5. If HLR authorises MTRF then use new MSC/VLR numbers to trigger sending of PRN Req 1. Send Identification (MTRF supported, New MSC/VLR numbers) CSFB Ref: 3GPP 23.272 V12.3.0
  • 25. 1x RTT CS Pre-Registration over EPS Procedure 25/27 1xCS CSFB UE E- UTRAN MME 1xCS IWS 1xRTT MSC 4. 1xRTT CS registration request 4a. UL/DL Information Transfer 4b. UL/DL S1 cdma2000 Tunnelling 4c. S102 Direct Transfer 6. 1xRTT CS registration response 6c. UL/DL Information Transfer 6b UL/DL S1 cdma2000 Tunnelling 6a. S102 Direct Transfer 1. UE attaches to E-UTRAN as specified in TS 23.401 5. Location update to 1xRTT CS domain 2. Decision to register with 1xRTT CS 3. Service Request procedure if the UE is in idle state . Ref: 3GPP 23.272 V12.3.0
  • 26. CS MO call using fallback to CDMA 1x RTT network 26/27 1xCS CSFB UE E- UTRAN MME 1xCS IWS 1xRTT MSC 1. UE is E -UTRAN attached and registered with 1xRTT CS 11. 1x MO call establishment per 3GPP2 specifications 4. UE Context Modification Request 3. Extended Service Request S-GW/ P-GW 5. Optional measurement report solicitation 7. S1 UE Context Release Request 8. Suspend Notification 10. UE Context Release 2. UE decision to perform MO call in 1xCS 6. E-UTRAN triggers RRC connection release with redirection 4. UE Context Modification Response 9. Suspend Acknowledge Ref: 3GPP 23.272 V12.3.0
  • 27. CS MT call using fallback to CDMA 1x RTT network 27/27 Ref: 3GPP 23.272 V12.3.0