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Fiber to the Antenna

Fronthaul Test

Summer 2018

2© 2018 Viavi Solutions Inc.www.viavisolutions.com

FTTA Installation Webinars

• Fiber Inspection and Connectivity• Cable and Antenna Test• Fronthaul Installation Test• Fiber Certification

For more information, visit viavisolutions.com/ftta

http://www.viavisolutions.com/


Fronthaul Life Cycle – Understanding the need

Construction / Installation

Commissioning / Acceptance

Maintenance / Troubleshooting

Optimization

Construction/ Installation is not the first phaseA significant amount of planning went into site selection which installers must be aware of

Installation is typically performed by multiple teams, cooperating to deliver a quality site

Commissioning / Acceptance verifies construction before starting the maintenance phase



Deployment Life Cycle and Working Groups



What challenges are faced when installing the fronthaul?Service Provider Perspective

• Consistency in testing• Need to increase installation quality to avoid maintenance problems from

the start• Optimizing and improving the installation process to reduce delays• Improving contractor efficiency to improve the cost model

Contractor Perspective

• Improve Quality to reduce “free” re-work• Make the documentation deliverables easy to produce to accelerate

ticket close out• Improve efficiency to improve project profitability



Fronthaul Installation: T-BERD 5882, Job ManagerAll-in-one Solution – One 30 Minute Close-Out Summary ReportOtherwise a very complex job

P5000i Fiber Microscope

Ethernet Tests – Timing, PoE, CAT Cable DiagnosticsE

RFoFiber Analysis – PIM Detection, Diversity ImbalanceRF

OTDR – insertion loss, optical power, reflectance, impairmentsOT

CPRI BERTCB

CS Cloud Services – asset management, test report storage

Fiber Inspection IN

CPRI Check & BBU Emulation – RRH firmware, SFP type, Serial #C

RET Test – read and adjust anglesR

VSWR TestV

SI Satellite Antenna Installation

JunctionBox - Fiber

OTDR

CPRI CheckBBU

Emulation

Microwave Backhaul

Fiber Inspection

CSR

BB

U

PIM DetectionInterference AnalysisDiversity Imbalance

RET VSWR

JunctionBox - Fiber

Fiber

RRH

RJ-45 – Cat “x” STP

RJ-45 Cable Diagnostic

POE Check

Satellite Antenna

Installation

Per–HopEthernet

BERT

PTP TimingTBERD 5800Job Manager

TBERD 5800-EPP

TBERD 5882

4100 Series OTDRs

StrataSyncCloud

Services

Asset and Calibration Tracking

Installed Separately



Job Manager …

is a workflow tool included in the TBERD-5800 at no additional cost

executes test plans created prior to going to a job site making it easy to load test templates

provides customizable job guidance

improves quality and efficiency via repeatability

makes it easy to close out jobs by summarizing reports from multiple tests

Job Manager …

is not required to run a test

is not a paid feature or subscription service

does not dictate parameters or pass/fail criteria for specific tests

does not require a test plan administrator

does not force a workflow, it’s only a checklist

What is Job Manager?



Benefits to creating a test plan before testing

Reduce Typing Guide Technicians

Ensure the job is Done Right

Summarize Status

Create complex jobs with multiple tests

Fill out job info once before getting to site

Eliminate the need to fill in info at the job site

Step by step checklist

Ensure all tests are done

Visual guides embedded in checklist provide guidance

Single summary report provides comprehensive proof all tests pass

All test details still available in the reports

Avoid time consuming manual documentation steps

Make every tech an expert just by following the plan



Job Manager in DetailCreate a single close-out report containing the status of all tests

Load jobs from a file imported onto instrument

Job information applied to all tests

View each required test in the plan

Saving test reports moves status of each step from To Do to Pass, Fail, or Complete

Launch each test

Customizable guidance



Guide technicians through connections and manual steps

PDF document loaded on test set

Launch the test after connecting



Tech CreatedEach technician creates a test plan for his own jobs

Saves time at the job site

Delivers maximum flexibility

Who owns the test plans – you decide?

3rd Party CreatedTest plan communicates what needs to be done

Manager or project leads create them

Increase consistency and alignment on job tasks

Automatic Job CreationAPI lets you directly create test plans

Integrated with OSS

Immediate job creation and immediate close-out

Improve efficiency



CPRI Check with RFoCPRISimplified workflow for ensuring proper RRH installation

Check local optic

Check CPRI Protocol

Login to RRH - RRH ID- Set antenna tilt

- Check VSWR- Check PIM

Note: Currently the full flow only supports ‘ALU’ RRH

View live spectrum & spectrogram during test



RRH Identification

Logs into the Remote Radio Head (RRH) and reports information about it



RAN Installation RET Test

Detect Multiple Antennas

Set tilt on each antenna



Checking VSWR as part of RAN Installation

What is VSWR?

Voltage Standing Wave Ratio, is a measure of how efficiently radio-frequency power is transmitted from a power source, through a transmission line, into an antenna.

In an ideal system, 100% of the energy is transmitted.

In real systems, some of the power is reflected back toward the source (like an echo).

Reflections cause destructive interference.

VSWR measures these voltage variances.

Values closer to 1 are better.



The importance of Diversity Imbalance

Measure receive power levels on 4 antennas to ensure similar levels



Detecting PIM as part of RAN Installation

What is PIM?

PIM stands for Passive Intermodulation. PIM is the generation of interfering signals caused by nonlinearities in components of a wireless system. Two signals mix together and cause interference.

This usually happens anywhere that two different metals come together.

It is caused by rust, corrosion, loose connections, dirt, oxidation, and any similar contamination. Even nearby metal objects can cause PIM.

Two RF signals relatively close in frequency are required to trigger PIM effects. The higher the power used, the greater the PIM signals generated.

Interfering signals can raise the noise floor and block desired signals. End effects include dropped calls, decreased system capacity, and decreased data rates.

How do we detect PIM?

Connect to the RRH and instruct it to transmit at maximum power.

Use receiver to listen for interference.



Passive Intermodulation (PIM)

Set threshold and bandwidth

Measured by transmitting a test signal and calculating slope of min hold

Pass/Fail on up to 4 antennas

Visualization of PIM in spectrum analysis



• Verify installed satellite antennas have no “blind spots” are not blocked from line of sight to satellites

• Run a 12 to 24 hour CNO Spectrogram to confirm good signal strength from multiple satellites in diverse sky plot positions

Satellite Antenna Installation



Microwave Backhaul – Getting traffic back to the MSO

Ethernet Tests – Timing, PoE, CAT Cable DiagnosticsE

TB/MTS 5882

JunctionBox - Fiber

Microwave Backhaul

CSR

BB

U

JunctionBox - Fiber

Fiber

RRH

RJ-45 – Cat “x” STP

RJ-45 Cable Diagnostic

POE CheckPer–HopEthernet

BERT

PTP Timing

Job Manager

TB/MTS 5800-EPP

PTP Timing

Per–HopEthernet

BERT

RJ-45 Cable

Diagnostic

Validate Microwave as Boundary Clock- PTP Wander Analysis- One Way or Two Way PDV Analysis- Max|TE| Analysis- T1/E1, 1PPS or 10MHz Wander Analysis

Ethernet Backhaul Per-Hop BERT- RFC 2544- Y.1564- RFC 6349 (TrueSpeed)- QuickCheck- Configurable Pass/Fail- KPIs: Throughput, Jitter, Delay, Frame

Loss Rate & Burstability

- Twisted Pair Cable Distance- WireMap Test- Shield ground continuity Test- TB/MTS-5800-EPP L1 Ethernet traffic reflector

PoE Check - Roadmap item – query PSE for PoE Type & power

Installed Separately



Enhanced Cable Diagnostics – Testing STP Outdoors

TB/MTS 5800-EPP – Ethernet Peering Partner – is used on the far end to complete shield ground & wiremap test

TB/MTS 5800-EPP (Ethernet Peering Partner) is a layer 1 traffic reflector▫ Supports reflecting RFC 2544, Y.1564 or QuickCheck Tests over the cable

All cable diagnostic test results are integrated with Job Manager

3 main test

1. Cable Length – is the cable under 100 meters2. Cable Wiremap – are pin-outs correct3. Shield ground continuity test – did I crimp it

down correctly?



Questions

Contact Joe Gomez:[email protected]


www.viavisolutions.com


fiber to the antenna - viavi solutions...antenna installation per–hop ethernet bert ptp timing...

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