CellAdvisorEduardo InzunzaBusiness Development23 May 2017

Licensed Assisted Access

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Topics

LAA Introduction

LAA Analysis

Summary

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License Assisted AccessOverview

Delivered via LTE carrier aggregation

Source : Qualcomm

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License Assisted AccessBenefits

Coexistence with WiFi

Source : Qualcomm

Listen Before Talk (LBT)

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Licensed Assisted AccessImplementationLAA Bands• Unlicensed National Information Infrastructure (U-NII) bands.

- U-NII-1 (band 252) : 5150MHz to 5250MHz (indoor only)

- U-NII-2 (band 253 and 254) : 5250MHz to 5725MHz (restricted by FCC)

- U-NII-3 (band 255) : 5725MHz to 5850MHz

• Supplemental Downlink (SDL) deployment• Applicable only for LTE-FDD carrier aggregation (CA)• Channel bandwidth of 20MHz

LAA Characteristics• Clean Channel Sensing Energy Detection : -62dBm• Maximum transmitted peak power : 1W (30dBm)• Maximum radiated power : 200mW (23 dBm)• Small Cell duty cycle {integral of Ton / integral of (Ton + Toff)} ≤ 33 %. • Small Cell Ton,max ≤ 20 msec.

Source: LTE-U Forum (ALU, E///, LG, Qualcomm, Samsung, Verizon3GPP 36.889, 36.104

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Licensed Assisted AccessImplementation

• LAA is a radio access technology providing carrier-grade wireless service in the 5GHz unlicensed band

• LTE-FDD carrier aggregation is used having an anchor or primary carrier on the licensed band and the secondary carrier on the WiFiband

• LTE channel bandwidth in 5 GHz unlicensed spectrum is 20 MHz.

Source: LTE-U Forum (ALU, E///, LG, Qualcomm, Samsung, Verizon)

LTE-Licensed746 – 756 MHz

LTE-Unlicensed5150 – 5250 MHz

10MHz 20MHz 20MHz

LAA: LTE Primary and WiFi Secondary

LTE

WiFi

ANCHOR CARRIER AGGREGATION

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Topics

LAA Introduction

LAA Analysis

Summary

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Licensed Assisted AccessSpectrum and Interference Analysis

Interference Analysis on 5GHz spectrum measuring spectrum activity with SSID de-codification, isolating activity of interference signals

U-NII-15150 to 5250

U-NII-35725 to 5850

WiFi SSID

Interference

AWS

U-NII-1 CH 36

AnchorLTE

SecondaryDownlink

LTE

LTE Anchor and Secondary Downlink Aggregation

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Licensed Assisted AccessSpectrogram Analysis

LTE and WiFi Channel Sharing

U-NII-1 CH 36AWS

LTE LTE

WiFi

WiFi

U-NII-3 CH 149U-NII-1 CH 36

LTE

WiFi

LTE

WiFi

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Licensed Assisted AccessSignal Analysis

Carrier Aggregation Signal Analysis

AnchorAWS

SecondaryU-NII-1 CH 36

U-NII-1 CH 36

Noise

AWSAnchor

LTE

AnchorAWS

SecondaryU-NII-1 CH 36

U-NII-1 CH 36

LTE

AWSAnchorLTE RF

LTE Signal Analysis of Anchor and SDL (OFF) LTE Signal Analysis of Anchor and SDL (ON)

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Topics

LAA Introduction

LAA Analysis

Summary

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• Installation• Coax Feed-line Reflection Test (VSWR/RL, DTF)• Fiber Feed-line Optical Power and Fiber Inspection

• Trouble-Shooting• PIM Detection• DAS Comparison Test

• Performance• Signal Analysis (Modulation Quality)• LTE Broadcast (MBMS)• LTE Advanced (Carrier Aggregation, MIMO 4x)

• Optimization• Coverage Mapping• RFoFiber

• Cloud Services• Automatic Tests• Asset Management• Data Management

CellAdvisor Summary

RF

FiberLTE

LTE-A

MBMS

RFoFiber

Cloud DAS

StrataSync

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