Rohde & Schwarz OTA Test Forum

DEVICE CERTIFICATION AND PERFORMANCE

TESTING FOR OTA: TODAY AND TOMORROW

RONALD BORSATO

OTA CHIEF TECHNICAL OFFICER

PCTEST ENGINEERING LABORATORY

PCTEST CONFIDENTIAL

CTIA/PTCRB Certification Testing for OTA

Performance Testing for OTA

5G Impacts

Certification Testing (OTA and RF/Protocol)

OTA PerformanceTesting

Agenda

CTIA/PTCRB Certification Testing for OTA

PCTEST CONFIDENTIAL

CTIA OTA Test Plan.

• Full Test Plan Title

“CTIA Test Plan for Wireless Device Over-the-Air Performance”

• Overview of Key Testing Requirements for SISO OTA

• Cellular TRP and TIS in Free Space, Beside Head/Hand, and Hand Only Phantom Test Configurations

• GSM/GPRS/EGPRS/WCDMA/LTE/CDMA/1xRTT/1xEV-DO

• 2DL and 3DL Carrier Aggregation Configurations for LTE

• A-GNSS TIS in Beside Head/Hand and Hand Only Phantom Test Configurations

• GSM/WCDMA/CDMA Control Plane, LTE User Plane or Control Plane

• Intermediate Channel Desensitization Testing

• Cellular and A-GNSS

• Laptop/Tablet and M2M TRP and TIS Testing for Cellular and A-GNSS in Free-Space

PCTEST CONFIDENTIALCTIA OTA v3.6.x Test Plan (Mandatory as of 10/15/2016)

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• Current required revision is Version 3.6.2

• Updates from Version 3.5.2:

• Additional Downlink LTE Carrier Aggregation Aspects

• Additional 2 DL CA Combinations With Harmonic/Intermodulation Issues

• 3 DL CA Combinations with ICS Logic

• Alternate Phantoms

• Wide PDA Hand (72mm to 92mm wide devices)

• LTE Control Plane A-GNSS OTA

• Test Time Reduction Considerations

• Reduced Legacy RAT Testing for Fully Tested LTE Bands

• Spiral TRP

PCTEST CONFIDENTIALCTIA OTA v3.7 Test Plan (Released in June 2017)

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• Mandatory date: November 30, 2017

• Updates from Version 3.6.x:

• OTA Performance of Wrist-Worn Devices (Informative)

• Testing will be based on a CTIA-designed arm phantom which provides OTA performance measurements with low uncertainty regardless of DUT strap size

• Category M1 TRP/TIS (Informative)

• New Operating Bands

• Band 66 and Band 70

• A-GNSS OTA

• Transmit Antenna Switching for Band 13 LTE A-GNSS

• Addition of SIB8/SIB16 for LTE A-GNSS

• Standalone GNSS OTA Guidelines (Informative)

• Further Test Time Reduction Considerations

PCTEST CONFIDENTIALCTIA OTA v3.8 Test Plan(Projected Release in January 2018)

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• Projected Mandatory Date: May 31, 2018

• Updates from Version 3.7.x:

• Changing from individual TIS (I-TIS) to combined TIS (C-TIS)

• OTA Performance of Wrist-Worn Devices (Normative)

• Category M1 TRP/TIS (Normative)

• Metropolitan Beacon System OTA (Indoor Positioning)

• LAA and any additional 2DL and 3DL CA combinations

• CA testing simplifications

• Alternate OTA test procedure for devices intended to operate at a very low transmit duty-cycle

• Further Test Time Reduction Considerations

• Optional Test Procedures

• Bluetooth and BluetoothLE

• ZigBee

PCTEST CONFIDENTIALCTIA 2x2 DL MIMO OTA Ver1.1.x Test Plan (Mandatory as of 4/1/2017)

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• CTIA “Test Plan for 2x2 Downlink MIMO and Transmit Diversity OTA Performance, Ver1.1 Published August 2016

• Scope Includes:

• SIR-Controlled Test Procedure for FDD Using the Multi-Probe Anechoic Chamber (MPAC)

• Receiver performance based on usage case (orientations) and RF environmental condition

• Control of the SIR allows evaluation of EUT’s spatial multiplexing performance similar to actual networks

• SCME Urban Macro Channel Model with operation in Open Loop Spatial Multiplexing (OL-SM) mode

• MIMO Average Radiated SIR Sensitivity (MARSS) Receiver Performance

• Averages Signal to Interference Ratio (SIR) levels resulting in 95%, 90%, and 70% of maximum throughput

• Updates from Ver1.0 to Ver1.1:

• Added upper limit of 30dB for SIR

• MARSS Performance Metric updated to reflect treatment of test points that are not capable of achieving the target throughput

• Added Channel Model Validation test limits

PCTEST CONFIDENTIALCTIA 2x2 DL MIMO OTA Ver1.1.x Test Plan (Mandatory as of 4/1/2017)

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• Updates from V1.1 to V1.1.1 (V1.1.1 released September 2017)

• Clarification that SIR is defined at a per resource element level

• Clarification that all UE antennas shall be enabled and in normal operating state duringtest

• Clarification that Data Mode Landscape (DML) would be using Right Tilt

• Clarification that Tablets fitting device size/antenna separation requirements to be tested in same orientations as handsets

• FYI – Scope for V1.2

• MIMO testing for TDD in SIR Environment

• Additional mechanical use cases for operating bands below 1 GHz; DMSU and DML-LeftTilt

• De-scope TM2 for UE-noise limited case due to decision to move to dual receiver TIS in main OTA Test Plan

• RTS (as per MOSG150906_R6 [1] including all RTS-related stipulations agreed therein)

• Optional VRC Test Utilizing TR 37.901 Follow-CSI Approach

PCTEST CONFIDENTIALCTIA WiFi Mobile Converged Devices v2.0.3Test Plan (Mandatory as of October 01, 2015)

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• CTIA “Test Plan for RF Performance Evaluation of Wi-Fi Mobile Converged Devices” Version 2.0.3. Published September 2016

• Scope Includes:

• Wi-Fi for 802.11a/b/g/n

• Wi-Fi Conducted Power and Sensitivity Tests

• Radiated RF Tests: Wi-Fi TRP, Wi-Fi TIS, Wi-Fi Rx Sensitivity w/Cellular active, Cellular Rx Sensitivity

with Wi-Fi active

• Baseline methodology is CTIA OTA TRP/TIS

Performance Testing for OTA

PCTEST CONFIDENTIAL

Performance Testing for OTA.

• Operator Driven

• Focus in Areas not Addressed by Certification:

• Bluetooth, NFC, GPS, Co-Existence, Internal Desense at Operator Specific Channels

• Alternate Metrics (Near-Horizon Partial Quantities, Antenna Efficiency, ECC,etc.)

• Alternate Test Environments (Reverberation Chamber w/ and w/o Channel Emulator, Small Chambers, etc.)

• Alternate Device Positioning, Alternate Phantoms (Ground Plane, Body-Worn, Lap/Table,etc.)

• Targeted OTA Tests/Metrics based on Device Type

• Operator Specific RF Channel Configurations and Channels

• Operator Specific Pass/Fail Requirements

• Goal is to Derive Expected Network Performance/Coverage from Performance Test

• Certification Testing Metrics may not Allow for a Full Evaluation

5G Impacts

PCTEST CONFIDENTIAL

5G Impacts for Certification Testing.

• Device Testing for Operating Bands > 6 GHz:

• Conducted Testing Impractical for Antenna Arrays

• OTA Baseline Test Method

• Degrees of Freedom for Device Orientation and Measurement/Link Antenna Orientation

• Radio Performance and Protocol Areas Need Specific OTA Solutions

• Antenna Performance

• RF (Tx/Rx Characteristics)

• Radio Resource Management

• Demodulation Performance

• Protocol Conformance (Possible Mix of RF and RRM)

• Test System Simplification for Complex Test Environment Required

• Conformance Test System Complexity, Size, and Cost Need to Meet Market Needs

• Minimize Impact to Test System Operators (OTA Knowledge Now Required)

DRAFT 3GPP TR 38.810

PCTEST CONFIDENTIAL

5G Antenna Array15

Full Brute Force

Beam Steering

Solution with

Channel Emulation

Impractical

IC1004 TD(15)12048

Dublin, Ireland

January 28-30, 2015

PCTEST CONFIDENTIAL

RF/RRM Conformance < 6 GHz16

Test Equipment

Connected to Shield

Box with RF Cables

PCTEST CONFIDENTIAL

RF/RRM Conformance > 6 GHz17

Test Equipment

Connected to Full

Anechoic OTA

Chamber

Chamber Size TBD

Facility Impact TBD

PCTEST CONFIDENTIAL

5G Impacts for Certification Testing.

• Far-Field

• Chamber Size

• Path Loss

• Measurement Distance

• Device Size

• Antenna Size

• Impact of Test Equipment Power and Sensitivity Requirements

• Device Positioning

• Device Centering vs. Antenna Array Centering

• Positioning Accuracy

• Impact of Test System Uncertainty

DRAFT 3GPP TR 38.810

PCTEST CONFIDENTIAL

5G Impacts for Certification Testing.

• UE Antenna Beamwidth

• UE Antenna Beamwidth Unknown

• Impact of Certification Measurement System Sampling

• Certification Test Metrics

• TRP vs. EIRP

• C-TIS vs. EIS

• Efficiency?

• UE Test Functions

• Beam Lock

• Others

PCTEST CONFIDENTIAL

5G Impacts for OTA Performance Testing.

• Impact to Performance Testing

• Operator-Specific Test Conditions and/or Test Metrics may Impact Baseline Test Method

• Previously Re-Use of Baseline Test Method was MorePractical

• Reliance on UE Test Functions and Implementations

• Implementation Errors may Obscure PerformanceMeasurement

• Possible Performance Tests with Baseline Test Setup Impact

• Beam Tracking/Beam Acquisition

• Interworking (Handover, UE Measurements, etc.) with Multiple Beams

Thank you for your attention!.