4G World 2012 CSFB Original

© 2012 Qualcomm Technologies, Inc. All rights reserved. 1

CSFB Performance

October 2012


High-Level Multimode Options for LTE Voice

Long-Term Voice Solution LTE VoIP Handsets

Initial Launches Data Devices

Initial Voice Solution LTE Data Handsets

2G/3G Coverage Continuity and Roaming

LTE for Data Only LTE for Data

2G/3G for Voice

Simultaneous LTE VoIP

and Rich Data Services

LTE/3G/2G

Multimode

(Redirection,

PS Handover)

Dual-Radio

1x Voice + 4G Data

Circuit Switched

Fallback to 2G/3G

CS Voice and Data

VoLTE with Single Radio

Voice Call Continuity

VT and RCS-Enabled

Services and Apps

+ CSFB for Roaming


First Step for LTE Voice Support Circuit Switched Fallback (CSFB)

Enables global voice/SMS roaming and interworking for LTE devices

Fully standardized for 2G and 3G

Utilizes mature/ubiquitous 2G/3G networks for voice

Commercially launched across all LTE regions

Strong global ecosystem

Reliability comparable to native CS calls

Subsecond incremental call setup time in live networks

CSFB Enables Single Radio Device Architecture

with Better Cost, Power, and Form Factor


3GPP CSFB Network 3GPP2 CSFB Network

CSFB Network Architecture

S4 S3

SGs

S11

S1-C

S1-U

S5/S8 SGi

SGSN

MME MSC/

VLR

P-GW S-GW

E-U

TR

AN

S1-U

S102

S11

S1-C A1

MME MSC/

VLR

1x

IWS

P-GW S-GW

E-U

TR

AN

S5/S8 SGi


CSFB Summary Device is registered for both CS and PS services via LTE

CS voice pages are delivered over LTE

Device remains on LTE except for voice calls

SMS can be received over LTE

For voice calls, UE falls back to UMTS/GSM/C2K

Mobility methods supported:

Method Target Info Target Prepared Measurements LTE → W LTE → G LTE → C2K

Redirection Target Frequency No Optional Yes Yes Yes

Cell Change Order Target Cell No Required No Yes No

Handover-Based Target Cell Yes Required Yes Yes Yes


CSFB to UTRAN Call Setup Delay (Mobile-Originated)

Redirection-Based CSFB Call Setup Delay with

SI Tunneling Is Comparable to Legacy Call Setup Delay

4000 4000 4000

2530

530 380

0

1000

2000

3000

4000

5000

6000

7000

Redirection Rel 8 Redirection Rel 9 (SI Tunnel) PS Handover

AdditionalCSFB Delay

UTRAN Legacy

Data shown redirection scenarios is based on results from LAB and field testing. Data shown for handover scenario is based on internal Qualcomm Technologies testing.

Call

Setu

p D

ela

y (

ms)


CSFB to UTRAN Call Setup Delay (Mobile-Terminated)

Redirection-Based CSFB Call Setup Delay with

SI Tunneling Is Comparable to Legacy Call Setup Delay

2640 2640 2640

2530

530 380

0

1000

2000

3000

4000

5000

6000



UTRAN Legacy


Call

Setu

p D

ela

y (

ms)


CSFB PS Data Interruption

The Handover Option Provides the Lowest Data Interruption Time;

For the Redirection Options, ISR Can Significantly Reduce Data Interruption Time

6770

4770

300

2770

770

300

0

1000

2000

3000

4000

5000

6000

7000

8000


Without ISR

With ISR


CS

FB

PS

Data

Inte

rruption (

ms)


CSFB to GERAN Call Setup Delay (Mobile-Originated)

RRC Release with SI Tunneling Provides the Best CSFB Solution

3900 3900 3900 3900

2560

560

2960 2660

0

1000

2000

3000

4000

5000

6000

7000

8000

Rel 8 RRC Release Rel 9 RRC Release(SI Tunnel)

Rel 8/Rel 9 CCO/NACC Rel 8/Rel 9 Handover


GERANLegacy

Data shown is based on internal Qualcomm Technologies testing.

Call

Setu

p D

ela

y (

ms)


1xCSFB Call Setup Delay

e1xCSFB Offers the Shortest Call Setup Time

1700

4260 4000

4700

1650

2390

0

1000

2000

3000

4000

5000

Mobile-Originated Mobile Terminated

Native 1x

Rel 8 1xCSFB

e1xCSFB

1xC

SF

B C

all

Setu

p D

ela

y


Dual Radio vs. e1xCSFB

*Some 1x and LTE band combinations may need special attention. **If LTE roaming is not in place then the device will camp on 1x network, provided 1x roaming agreement is in place. *** Dependency on PRL configuration

Metric Dual Radio Solution e1xCSFB

Estimated MO Call Setup Delay 50ms+e1xCSFB Best

Estimated MT Call Setup Delay 1870ms+e1xCSFB Best

Standby Power Consumption 1x+LTE Idle Standby Best (LT-Only Standby)

User Experience Best (Simultaneous Voice and Data [SVD]) No SVD

Device Cost Higher Lower

Network Cost Lower (No Network Impact) Higher

Outbound Roaming No Network Impact* Needs LTE Roaming to Support e1xCSFB**

Inbound Roaming 1x voice, Data on EV-DO*** All Inbound Roamers Allowed

SMS Need IMS to Offload from 1x Network Reuse S102 to Offload from 1x n/w

Future Considerations VoLTE Will Require Nationwide LTE S102 Can Be Reused for SRVCC


In Conclusion CSFB offers a solution with the cost, size, and battery life advantages of single-radio solutions,

LTE data speeds, and reliability/ubiquity of 2G/3G voice

Redirection-based CSFB using Release 9 SI Tunneling, for both 3G and 2G offer call delays within subseconds of legacy call setup delay

Redirection-based CSFB offers call reliability on par with legacy call setup reliability

Compared to dual radio solution, e1xCSFB offers more cost effective device solution and also with shorter call setup delay

Additional details on CSFB are also available at: http://www.qualcomm.com/media/documents/circuit-switched-fallback-first-phase-voice-evolution-mobile-lte-devices


© 2012 Qualcomm Technologies, Inc. All rights reserved. Qualcomm, Snapdragon, and Gobi are trademarks of Qualcomm Incorporated, registered in the

United States and other countries. Trademarks of Qualcomm Incorporated are used with permission. Other products and brand names may be trademarks

or registered trademarks of their respective owners.

Qualcomm Technologies, Inc

5775 Morehouse Drive

San Diego, CA 92121-1714

14

Agenda

1:30 pm The 1000x mobile data challenge

- 1:30 How do we enable 1000x? Rasmus Hellberg, Sr Director, Tech Marketing,

- 1:45 How do we get access to new spectrum to reach 1000x? Prakash Sangam Director, Tech Marketing

- 2:00 Taking HetNets to the next level for 1000x Rasmus Hellberg Sr Director, Tech Marketing

- 2:15 The small cell products to power 1000x Prakash Sangam Director, Tech Marketing (3G/4G small cells, Wi-Fi)

2:45pm The Chipset evolution and multimode challenges

- 2:45 Smartphone signaling and power enhancements Sunil Patil, Director, Product Management

- 3:05 Solving the global multimode and carrier aggregation challenges Peter Carson ,Sr Director Marketing

- 3:25 Circuit switched fallback, performance and interworking Sunil Patil, Director, Product Management

(LTE FDD/TDD GSM, UMTS, TD-SCDMA, 1X)

3:45pm The Voice and data Service evolution—together with Ericsson

- 3:45 The latest on VoLTE Eric Parsons, Strategic Product Manager, (RCS, SRVCC VoLTE, VoIP over other accesses) , LTE, Ericsson

- 4:00 How do we achieve the Smart Pipe? (QoS and more) Peter Carson, Sr Director Marketing

- 4:10 LTE Broadcast services and opportunities Mazen Chmaytelli, Sr Dir, Business Dev.

4G World Wednesday October 31st 1:30pm to 4:30pm

Documents

4G World 2012 CSFB Original