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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