1

Extending the benefits of LTE Advanced to unlicensed spectrum

Nov, 2014

2

Extending the benefits of LTE Advanced to unlicensed spectrum

Features to protect Wi-Fi neighbors

Longer range and increased capacity1 Thanks to LTE Advanced anchor in licensed spectrum with robust mobility

Common LTE network with common authentication, security and management.

Coexists with Wi-Fi Unified LTE Network

Better network performance Enhanced user experience

Carrier aggregation

Ideal for small cells

F1LTE in

Licensedspectrum

LTE inUnlicensedspectrum

5 GHz

700MHz to 3.8GHz

1 Compared to carrier Wi-Fi

3

LTE-U Carrier Aggregation Modes

TDD TDDLicensed Unlicensed

DL TDD

Licensed FDD UnlicensedUL

LTE-UCarrier Aggregation (CA)

TDD DL

Licensed Unlicensed

DL DL

Licensed FDD UnlicensedUL

LTE-U Supplemental Downlink (SDL)

4

LTE-U Deployment ModelsLTE-U Picocells / Metrocells

LTE-U Indoor Small Cells

Single LTE network for licensed and unlicensed• Integrated eNB

• Same core elements

• Same mobility and security framework

MME

Macro

Small Cell

OA&M P/S-GWLicensedLTE

LicensedLTE

LTE-U

LTE-U ideal for small cells• Outdoor picocells, metrocells

• Indoor small cells for enterprise and residential

• Possibly integrated with Wi-Fi

5

Certain regions only have tx power and emissions requirements− US, Korea, China, India and other markets

− In principle compatible with LTE Rel-10/11/12

− New RF band support (e.g. 5GHz) needed at both UE and eNB

− Coexistence and fair sharing can be achieved by non-standards, radio resource management implementation

Certain regions have additional channel occupancy requirements− For example: Europe, Japan

− LTE needs “Listen Before Talk” feature based on PHY/MAC enhancements

− Target LTE Rel-13 and beyond

Regulatory Aspects for Unlicensed Operation

Coexistence and fair sharing with WiFi is a requirement for LTE-U in all regions

6

20MHz

20MHz

20MHz* * * * * * * * * * * * * ** *

Up to 500 MHzavailable

5.33 GHz

5.49 GHz

5.835GHz

Unlicensed 5 GHz band

5.15 GHz

LTE-U is designed to coexists with Wi-Fi

Dynamically select clear channel: channel selection based on interference1

Sensing channel availability

Time

~2-10 ms with ‘Listen Before Talk’ features

3 Release unlicensed channel at low traffic load: fall back to licensed spectrum operation only

LTE is on

< 10 ms short gapAdaptive on/off duty cycle with CSAT depending on channel utilization

Sensing channel utilization

LTE is off LTE is off

Time

~100+ ms long gap

Mitigate if no clear channel is available: co-channel co-existence features2

Carrier Sensing Adaptive Transmission (CSAT) for fair co-existencewith Wi-Fi with 3GPP R10/11/12 for non-LBT regions e.g. US, Korea, China.

Optimized LTE waveform for Listen-Before-Talk targeting 3GPP R13 to meet regulatory requirements for LBT regions e.g. EU, Japan

* These 5GHz channels typically require DFS, Dynamic Frequency Selection

7

LTE-U: Improves User Experience in Pico Deployments

LTE-U offers gain of ~3X over Wi-Fi

LTE-U is a good or better neighbor to other operator’s Wi-Fi

LTE HetNets +Wi-Fi (both operators)

LTE HetNets +Operator A: Wi-Fi

Operators B: LTE-U

LTE HetNets +LTE-U (both operators)

DL Median User Throughput Gain of LTE-U SDL

1.1X1X

3.1X

3.6X

3GPP D1 model, two operators each deploys 4 Picos per macro in a cluster of 50m radius, 2/3 users in/near the cluster, bursty traffic load of 750Mbps. 10MHz LTE HetNets with FeICIC/IC + 8x40MHz unlicensed channel in 5GHz, 27dBm SC/AP EIRP, DL 2x2 MIMO, realistic rate control, Wi-Fi uses 802.11ac with LDPC codes, LTE-U uses ChS, OSDL and CSAT. Median or 5%tile statistics are across users that have an unlicensed carrier (Wi-Fi or LTE-U SDL).

LTE-U Gain over Wi-Fi

4 clustered Picos per Macro per

operator

8

LTE-U and Wi-Fi use the same configuration: outdoor SC/AP 2Tx/2Rx same Tx power (20dBm), same antenna gain(2dBi), 20MHz bandwidth, UE/STA use 1Tx/2Rx, 5GHz. LTE-U uses TDD config 2 with no DL data on special SF (60% DL duty cycle). Wi-Fi supports 802.11g/n modes.

LTE-U Offers Better Coverage Than Wi-Fi

9

12/2013: First introduction of the concept at 3GPP RAN #62

2/2014: Industry workshop among interested parties

3/2014: More discussions at 3GPP RAN #63

6/2014: RAN workshop in Sophia Antipolis, France on Jun 13th (following 3GPP RAN #64)− The workshop was well attended and fundamentally no one was against studying this topic in Rel-13

9/2014: LAA* was approved as a Rel-13 Study Item (SI) in 3GPP RAN#65− Supported by over 40 companies and the SI scope covers both SDL and CA(DL/UL)

− The SI is expected to conclude by June 2015 followed by a Work Item

NOTE: 3GPP Rel-13 ASN.1 freeze is scheduled for 1H2016

3GPP Status and Way-forward

* LAA: Licensed-Assisted Access

10

A leader in all solutions to best leverage unlicensed spectrumCommitted to continued leadership in both Mobile 3G/4G and Wi-Fi

1With Wi-Fi for backward compatibility

Licensed SpectrumCleared spectrum for 3G/4G,

ASA for 3G/4GExclusive use

Unlicensed SpectrumMultiple technologies

(Wi-Fi, LTE in unlicensed)Shared use

Local area access for private/residential, enterprise users

Mobile broadband

Local area access

Mobile operator managed service with unified LTE network aggregating licensed and unlicensed spectrum1

Mobile operator managed service with tighter Wi-Fi integration for better offload and enhanced services

3G/4G for licensed and carrier Wi-Fifor unlicensed spectrum

LTE Advanced for licensed and unlicensed spectrum

Wi-Fi in unlicensed spectrum

11

For more information on Qualcomm, visit us at: www.qualcomm.com & www.qualcomm.com/blog

© 2013 QUALCOMM Incorporated and/or its subsidiaries. All Rights Reserved.

Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries. Other products and brand names may be trademarks or registered trademarks of their respective owners.

References in this presentation to “Qualcomm” may mean Qualcomm Incorporated, Qualcomm Technologies, Inc., and/or other subsidiaries or business units within the Qualcomm corporate structure, as applicable.

Qualcomm Incorporated includes Qualcomm’s licensing business, QTL, and the vast majority of its patent portfolio. Qualcomm Technologies, Inc., a wholly-owned subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm’s engineering, research and development functions, and substantially all of its product and services businesses, including its semiconductor business, QCT.

Thank youFollow us on: