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!
We are going to cover complete list of VoLTE IMS KPI and performance Indicators . This includes :-
VoLTE IMS Control Plane KPI
- RSR : Registration Success Ratio (%)
- CSSR : Call Setup Success Rate (%)
- CST : Call Setup Time (s)
- MHT/ACD : Average Call duration (s)
VoLTE IMS User Plane KPI
- Mute Rate (%)
- MOS Score (1-5)
- RTP Packet Loss (%)
- One Way Calls (%)
Packet Core 4G Network LTE KPI
- Volte Attach Success Rate (%)
- VoLTE QCI=5 Paging Success Rate (%)
- Dedicated Bearer Activation Success Rate (%)
- IMS IP POOL Utilization (%)
- Create Bearer Success Rate (%)
Radio VoLTE KPI
- Call Drop rate (%)
- SRVCC Success Rate (%)
- Handover SR (%)
VoLTE Basic callflows in IMS network v2 - includes Registration, Basic VoLTE Call, SDP, Interconnect, Roaming, highlights important SIP headers for session routing and user identities.
LTE specifications support the use of multiple antennas at both transmitter (tx) and receiver (rx). MIMO (Multiple Input Multiple
Output) uses this antenna configuration.
LTE specifications support up to 4 antennas at the tx side and up to 4 antennas at the rx side (here referred to as 4x4 MIMO
configuration).
In the first release of LTE it is likely that the UE only has 1 tx antenna, even if it uses 2 rx antennas. This leads to that so called
Single User MIMO (SU-MIMO) will be supported only in DL (and maximum 2x2 configuration).
ims registration call flow procedure volte sipVikas Shokeen
This PDF , VoLTE IMS Registration tutorial covers IMS Registration sip procedure in depth & Provides extract of 3GPP / GSMA Specs , I am covering below call flow in Depth :-
- LTE Attach & Default Internet EPS bearer
- Role of QCI-1 ( Voice ) , QCI-5 (SIP Signaling) , QCI-6 to 9 (Internet)
- Default Vs Dedicated Bearer in LTE
- Default IMS EPS bearer in LTE
- SIP and IMS Registration
- TAS Registration
VoLTE Flows and legacy CS network. Basic call routing to and from CS network using BGCF, MGCF, MGW. ENUM role in routing. IMS Cetralized Services (IMC) and SRVCC scenarios.
Circuit Switched Fallback (CSFB) is the most commonly used method to support voice services over Long Term Evolution (LTE) networks today, as the deployment of IP Multimedia Subsystem (IMS) is still in its infancy.
We are going to cover complete list of VoLTE IMS KPI and performance Indicators . This includes :-
VoLTE IMS Control Plane KPI
- RSR : Registration Success Ratio (%)
- CSSR : Call Setup Success Rate (%)
- CST : Call Setup Time (s)
- MHT/ACD : Average Call duration (s)
VoLTE IMS User Plane KPI
- Mute Rate (%)
- MOS Score (1-5)
- RTP Packet Loss (%)
- One Way Calls (%)
Packet Core 4G Network LTE KPI
- Volte Attach Success Rate (%)
- VoLTE QCI=5 Paging Success Rate (%)
- Dedicated Bearer Activation Success Rate (%)
- IMS IP POOL Utilization (%)
- Create Bearer Success Rate (%)
Radio VoLTE KPI
- Call Drop rate (%)
- SRVCC Success Rate (%)
- Handover SR (%)
VoLTE Basic callflows in IMS network v2 - includes Registration, Basic VoLTE Call, SDP, Interconnect, Roaming, highlights important SIP headers for session routing and user identities.
LTE specifications support the use of multiple antennas at both transmitter (tx) and receiver (rx). MIMO (Multiple Input Multiple
Output) uses this antenna configuration.
LTE specifications support up to 4 antennas at the tx side and up to 4 antennas at the rx side (here referred to as 4x4 MIMO
configuration).
In the first release of LTE it is likely that the UE only has 1 tx antenna, even if it uses 2 rx antennas. This leads to that so called
Single User MIMO (SU-MIMO) will be supported only in DL (and maximum 2x2 configuration).
ims registration call flow procedure volte sipVikas Shokeen
This PDF , VoLTE IMS Registration tutorial covers IMS Registration sip procedure in depth & Provides extract of 3GPP / GSMA Specs , I am covering below call flow in Depth :-
- LTE Attach & Default Internet EPS bearer
- Role of QCI-1 ( Voice ) , QCI-5 (SIP Signaling) , QCI-6 to 9 (Internet)
- Default Vs Dedicated Bearer in LTE
- Default IMS EPS bearer in LTE
- SIP and IMS Registration
- TAS Registration
VoLTE Flows and legacy CS network. Basic call routing to and from CS network using BGCF, MGCF, MGW. ENUM role in routing. IMS Cetralized Services (IMC) and SRVCC scenarios.
Circuit Switched Fallback (CSFB) is the most commonly used method to support voice services over Long Term Evolution (LTE) networks today, as the deployment of IP Multimedia Subsystem (IMS) is still in its infancy.
Overview 5G Architecture Options from Deutsche TelekomEiko Seidel
At 3GPP RAN#72 5G Architecture discussion took place. This document lists all options that are under discussion.
Source: RP-161266 at RAN#72 Deutsche Telekom
AT&T View on LTE to 5G Network Migration Eiko Seidel
3GPP currently investigates possible 5G architecture options and how to migrate from LTE to 5G. The first stip will be to use Dual Connectivity with 5G while LTE is the Primary Cell. This will allow for very early deployments. Further steps are still to be defined and highly depend on the relation of EPC and Next Generation Core.
This presentation & video explains electromagnetic spectrum, frequency, band, bandwidth and how these concepts are used in mobile technology. We also look at antennas for smartphones including 2G, 3G, 4G and 5G
Presented by Tobias Engel <tobias@ccc.de>
Available to download from: https://berlin.ccc.de/~tobias/31c3-ss7-locate-track-manipulate.pdf
Shared with permission
The Saudi Arabian Grid Code has been developed to define the rules and regulations for various
Participants for accessing and using the Transmission System of the National Grid SA, a whollyowned
subsidiary of the Saudi Electricity Company. The Code has already established in the first
issue the obligations of the National Grid SA and other Grid Users—Generators, Distribution
Entities, and Directly-connected Customers—for accessing and using the Grid, in specific to: (i)
define obligations, responsibilities, and accountabilities of all the parties towards ensuring open,
transparent, non-discriminatory, and economic access and use of the Grid while maintaining
its safe, reliable, and efficient operation; (ii) define minimum technical requirements for the
Participants; and (iii) set out the information exchange obligations of the Participants.
Through its 7 chapters, the Saudi Arabian Grid Code attempts to cover matters such as defining of
technical, design, and operational criteria for Grid access and use, planning for Grid development
and reinforcement, System operation criteria and standards, Scheduling and Dispatch of supply
and demand resources, exchange of data and information, and metering policies and systems to
account for the Power and Energy transactions in the Grid.
Chapter 1, General Conditions, contains provisions which are of general nature and apply to all
sections of the Grid Code. Their objective is to ensure that the various sections of the Grid Code
work collectively and in harmony with each other for the benefit of all Participants.
Chapter 2, Connection Code, specifies basic principles and establishes a set of technical, design,
and operational conditions for the Users for connecting to and using the Grid. It also contains
information about the performance characteristics of the Transmission System at the Connection
Point to enable the Users to design their own facilities and schemes accordingly.
Chapter 3, Planning Code, provides a framework for enabling the TSP and Users to interact in
relation to planning and development of the Transmission System and also specifies the data and
information that they have to exchange with each other for this purpose.
It is a knowledge book of WCDMA mobile geolocation.
For outdoor environment.
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!
It is a handbook of WCDMA/HSPA mobile measurements in Air/Uu interface.
For FDD
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!
It is a handbook of WCDMA mobile measurements in Air/Uu interface.
For FDD and Non-HSPA
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!
It is a handbook of UMTS/LTE/EPC handover 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!
It is a handbook of UMTS/LTE/EPC basic 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!
It is a handbook of UMTS/WCDMA call flows for Handovers.
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!
It is a handbook of UMTS/WCDMA call flows for PS services.
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!
It is a handbook of UMTS-WCDMA call flows for CS services.
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!
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
The field of Information retrieval (IR) is currently undergoing a transformative shift, at least partly due to the emerging applications of generative AI to information access. In this talk, we will deliberate on the sociotechnical implications of generative AI for information access. We will argue that there is both a critical necessity and an exciting opportunity for the IR community to re-center our research agendas on societal needs while dismantling the artificial separation between the work on fairness, accountability, transparency, and ethics in IR and the rest of IR research. Instead of adopting a reactionary strategy of trying to mitigate potential social harms from emerging technologies, the community should aim to proactively set the research agenda for the kinds of systems we should build inspired by diverse explicitly stated sociotechnical imaginaries. The sociotechnical imaginaries that underpin the design and development of information access technologies needs to be explicitly articulated, and we need to develop theories of change in context of these diverse perspectives. Our guiding future imaginaries must be informed by other academic fields, such as democratic theory and critical theory, and should be co-developed with social science scholars, legal scholars, civil rights and social justice activists, and artists, among others.
Designing Great Products: The Power of Design and Leadership by Chief Designe...
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:
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
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