Monaco Telecom - WIMAX NW Audit_SOW _ED02

S T A T E M E N T O F W O R K

Monaco Telecom WIMAX NW Audit

Alcatel-Lucent

2Alcatel-Lucent Proprietary and Confidential © 2009 All Rights Reserved.

1- Introduction ............................................................................. 32- Radio RAN Audit Activities .......................................................... 5

2.1- LKB & Initial NW Design Assessment ............................................ 52.1.1. Description...................................................................... 52.1.2. Tasks & Requirements......................................................... 52.1.3. Deliverables..................................................................... 6

2.2- PND (Preliminary NW design) Optimization & tuning........................ 82.2.1. Description...................................................................... 82.2.2. Tasks & Requirements......................................................... 82.2.3. Deliverables..................................................................... 8

2.3- Radio Sites Survey................................................................. 102.3.1. Description..................................................................... 102.3.2. Tasks & Requirements........................................................ 112.3.3. Deliverables.................................................................... 11

2.4- Band Assignment & Freq. Plan .................................................. 122.4.1. Description..................................................................... 122.4.2. Tasks & Requirements........................................................ 132.4.3. Deliverables.................................................................... 13

2.5- Air interface Performance Assessment (Non regression Tests)........... 142.5.1. Description..................................................................... 142.5.2. Tasks & Requirements........................................................ 142.5.3. Deliverables.................................................................... 15

2.6- BS Sectors Drive test (Site Health Report).................................... 162.6.1. Description..................................................................... 162.6.2. Tasks & Requirements........................................................ 162.6.3. Deliverables.................................................................... 17

2.7- WIMAX NW Monitoring & QOS Follow up ...................................... 182.7.1. Description..................................................................... 182.7.2. Tasks & Requirements........................................................ 182.7.3. Deliverables.................................................................... 19

3- CORE IP NW Audit Activities ....................................................... 223.1- IP NW Problems History vs. IP NW Design Audit ............................. 22

3.1.1. Description..................................................................... 223.1.2. Tasks & Requirements........................................................ 233.1.3. Deliverables.................................................................... 23


1- Introduction

This document presents the scope of the WIMAX Activities that will be carried outthrough the Network Audit for Monaco Telecom WIMAX NW.

The Network Audit addresses the following networks: Connecteo in Ouagadougou (Burkina Faso) Connecteo in Douala and Yaounde (Cameroun)

However as Monaco Telecom remains the customer, further in the document, thenetworks are named “Monaco Telecom NW”

The scope of the Network Audit covers:

Radio RAN Activitieso NW RNP & Design Audito Air interface performance & Field Coverage Audito QOS Monitoring Audit & Follow up

Core IP Activities

The Audit will be basically done to the NW in the Pre-Launch Phase (Soft LaunchPhase); Further Assessment can be done using the online traffic in the NW viamonitoring the QOS of the online users in the NW.

(I) Radio RAN Audit phases Vs. Normal NW Rollout phases:

Figure 1: WIMAX Radio RAN Audit Phases vs. Normal NW Rollout Phases


The Radio RAN Audit Activities start with the Basic NW design & RNP Audit andcontinues through the Air interface performance & coverage assessment and endswith the QOS Monitoring follow up for the Online Traffic in the NW.

(II) The NW Core IP Audit:

Figure 2: WIMAX Generic NW Architecture

Figure 3: WIMAX NW Architecture (RAN + IP Core)


In this Part of the Audit only the IP core will be audited with all the IP connectionsbetween the different parts of the NW elements (servers and nodes).

2- Radio RAN Audit Activities

2.1- LKB & Initial NW Design Assessment

The Responsible RNE (Radio Network Engineer) will assess the initial NW design forMonaco Telecom NW as below,

2.1.1. Description

Through the DTQ (Detailed Technical Queries), Monaco telecom specified Someinputs for Alvarion tendering teams in order to start the NW design & Dimensioningbased on these specs, one of the basic inputs from Monaco Telecom is the NWdimensioning criteria as below,

Band in use, Carrier BW, # of carriers , Average HBA’s

Coverage Criteria & Coverage Clusters (Outdoor coverage or Indoor 1st wallor …etc)

CPE Types & Specs in usage

Min. throughput (UL or DL) at the Cell edge

Required MCS in service

Link budgets are performed to asses the maximum cell range that could be reachedby the sector taking into account all kinds of hardware losses (cable losses, filterlosses….), antenna gains, BS heights, indoor penetration and clutter lossesdepending on different kind of clutters used in the study.

2.1.2. Tasks & Requirements

The RNE (RADIO NETWORK ENGINEER) on SITE doing the Audit to assembleall the LKB’s done for the NW from the Previous RAN RNP design documentsdone by Alvarion for Monaco telecom.

The RNE (RADIO NETWORK ENGINEER) on SITE doing the Audit to assess allthe LKB values and features with their respective gains.

The RNE (RADIO NETWORK ENGINEER) on SITE doing the Audit to validateall the inputs and the outputs of the LKB’s done before using them toassess the RNP done using the RNP planning tool.

Required Support and help from the technical teams of Monaco telecom onsite for the RNE (RADIO NETWORK ENGINEER) on site doing the Audit (3rd

party – Alcatel-Lucent Engineer).


2.1.3. Deliverables

Based on the information Specified in the DTQ (Detailed Technical QueriesDocument) by Monaco telecom, ALU RNE (RADIO NETWORK ENGINEER) will becapable to calculate a generic LKB and hence compare it with the specified LKBdone by Alvarion in their initial Design and hence validate the Outputs and thestatistical cell radii and the MCS threshold levels to be used in the RNP planningtool.

Figure 4: WIMAX Sample LKB Sheet & its Deliverables

In the figure above, sample Link Budget for WIMAX 802.16e (3.5GHZ / 5MHZ channel/ CWBS / low power / Wave2 features / ALU solution) for Outdoor coverage inDense Urban using Outdoor CPE (1Tx/1Rx) for 256Kbps Minimum in UL at the celledge and its respective output.


From the Outputs of the LKB dimensioning; the statistical Cell Radii in differentClutter classes which are reflected directly on the no. of sites required to cover thearea of design & the Design levels for different MCS’s in the Network, using the NWgrid Design and using the planning tool (Atoll or Planet or …etc) the RNE (RADIONETWORK ENGINEER) can proceed with the NW designing and location of the sitesas below in the figure,

Figure 5: WIMAX sample ND & its Deliverables (MCS coverage & best server Plots)

Basically the RNP tool will determine the required No. of Sectors/sites to cover thearea of Interest and it will provide all the predictions that will be delivered to thecustomer in the PND (Coverage – RSSI, CINR plots, Best server plots and in caserequired by the customer Traffic plots can be included).

In this step the RNE (RADIO NETWORK ENGINEER) on SITE doing the Audit willgenerate a complete assessment report including all the problems seen in the InitialDesign with out recommendations for rectifications in order to be demonstratedin front of Monaco Telecom before proceeding with the recommendations report forproblems rectifications.


2.2- PND (Preliminary NW design) Optimization & tuning

2.2.1. Description

After generating a complete report on the initial NW Design done by Alvarion forMonaco telecom NW in Burkina, and all weak points are shown, the RNE (RADIONETWORK ENGINEER) on SITE doing the Audit will generate another report with allthe recommendations for all the Faults found in the basic Initial Design, suchproblems could be due to;

Wrong assumptions in the PND. Candidates Site acquisition deviation from the designed

nominal Locations. Change in Physical param’s for the acquired sites from that in

the design. CPE’s specs change (greatly affect the design). Any Modification in the customer requirements. Any other possible changes that could pop up.


The RNE (RADIO NETWORK ENGINEER) on SITE responsible for the Audit. Tools: Atoll Planning Tool (license), Mapinfo, LKB & Dimensioning Tool, MS

Office.

2.2.3. Deliverables

A Complete RNP report to be delivered indicating all the changes done to theDesign in the PND with all the details below;

Detailed Changes in the PND indicating any extras. New LKB and justifications (Optional). New RSSI Coverage plots (generic views + Map info. Export). New MCS Coverage Plots. New CINR coverage plots (if needed). New Best server plots. Any further recommendations. Clear Bench Marking between the Initial & the final case for

the NW (before & after the design Tuning).


Figure 6: Sample MCS Coverage plots Bench Marking

In This step the RNE (RADIO NETWORK ENGINEER) on SITE doing the Audit will begenerating a report with all the recommendations and hints for all faultsrectifications in the initial NW design (in case faults are found).

MCS Cov. % of City phase (1-3) Cov. % of City phase (4)64-QAM 3/4 3.9% 36.9%64-QAM 2/3 9.5% 43.7%16-QAM 3/4 11.9% 57.7%QPSK 3/4 14.2% 79.1%

16-QAM 1/2 35.6% 79.7%QPSK 1/2 50.8% 93.2%


2.3- Radio Sites Survey

2.3.1. Description

It is mandatory for the RNE (RADIO NETWORK ENGINEER) to visit the location of theSites where the WIMAX BS’s are installed with the antennas in order to assure thatclear view (Proposed HBA with respect to surrounding clutter classes), No blocking ,Diffraction losses, correct separations are taken care of , physical parameters ofSectors…etc.

Figure 7: Nominal Physical Separation values & WIMAX Site installation



1 RNE (RADIO NETWORK ENGINEER) (Alcatel-Lucent), 1 Rigger from Monacotelecom on site team.

Equipment: Compass, Meter, GPS, Digital Camera (for the panoramic views),incline-meter.

Laptop, Google earth, Mapinfo, Atoll RNP planning tool (in case of candidatevalidation), MS Office.

2.3.3. Deliverables

A complete SSR (site survey report) has to be made by the RNE (RADIO NETWORKENGINEER) to include all the data collected as below;

Panoramic snaps for 360 Degrees with step 20 degrees from the Antennainstallation location in the site.

0 deg 30 deg 60deg 90 deg

210 deg 240 deg 290 deg 310 deg

Figure 8: Panoramic Views @ the location of Ant. installation / surveyed site

Different snaps for the Rooftop entrance & power supply source & locationsof installation.

Plan view AutoCAD sketch for the rooftop and the installation of theEquipments.

Any special recommendations for the installation of the Antennas. Obstructions Matrix

Figure 9: Obstruction Matrix to be attached in the SSR


Coverage Plots for the new candidate

Figure 10: Real location on the Atoll Planning tool with its Coverage plots

2.4- Band Assignment & Freq. Plan

2.4.1. Description

Normally the Band Acquired by the WIMAX operators from the country regulatorsare taken as a whole and not standard can be any continuous band in the specifiedrange (2.3 GHZ, 2.5GHZ, 3.5GHZ,…etc) thus as a part of the responsibilities of theRNE (RADIO NETWORK ENGINEER) is to divide the assigned band into several carriers(5MHZ or 10MHZ as per the specs in the NW design) taking into consideration therequired guard bands but in an efficient manner so as not to waist the Assignedspectrum.

Figure 11: Example Band Assignment for 35MHZ allocated in the 3.5GHZ band

The 2nd part comes in planning the Carriers for the serving sectors in the area ofdesign taking into consideration the minimization of the Co-Channel effect in theNW to maximize the CINR and the capacity & performance of the NW.

Figure 12: Example Carriers planning in a 1X3X6 WIMAX deployed NW.



1 RNE (RADIO NETWORK ENGINEER) on site doing the NW Audit. Tools: Mapinfo, Google Earth, Easy RNP (optional), Atoll RNP tool - A9155

(license), MS office.

2.4.3. Deliverables

Report for the Spectrum Band Assignment with Freq. plan. Detailed report for the DL CINR & MCS plots in the NW (using Atoll Planning

tool – Optional and as per the customer request). Service can be tuned to Upgrade Existing Planned NW’s from lower no. of

Carriers to larger no. (If More Spectrum is acquired).

Figure 13: Sample MCS plots (CINR based – FP dependent)


2.5- Air interface Performance Assessment (Non regressionTests)

2.5.1. Description

Through this activity; the RNE (RADIO NETWORK ENGINEER) will participate withMonaco telecom technical teams to assess the performance of the air interface ofthe deployed NW & extract all the regressions from the field (through Air interfacetests) and escalate back to the RAN Vendor (Alvarion) in case any Performanceregressions are seen.

Sample list of tests to be performed are as below;NW entry Moving Applications Pinging RTT delay Throughput Vs. Different Radio conditions Spectral Efficiency Basic E2E tests Cell Capacity tests Load Tests


1 RNE (RADIO NETWORK ENGINEER) (per Activity testing and might be more –According to the Activity), 1 Car, 1 driver, 1 technical support engineer forsupervision.

Equipment: N X Laptops, Power sources, N X CPE’s under test (CalibratedCPE’s).

GPS & DT setup with external antenna (for the coverage performance tests).

P.S: in the Load tests & the capacity tests, more than 1 RNE (RADIO NETWORKENGINEER) are required for the multiple Actions in the same Activity (6 RNE (RADIONETWORK ENGINEER)’s are needed in the Capacity tests).


2.5.3. Deliverables

A final report is to be generated by the RNE (RADIO NETWORK ENGINEER) on sitedoing the Audit in order to show the performance from the different testingmodules and hence show the regressions (in case regressions are there).

Figure 14: Sample processed output for Certain RAN release (ALU & Motorola)

Figure 15: Sample processed output for NW entry

Cell Capacity FTP UL

0

1000

2000

QPSK 1/2 QPSK 3/4 16 QAM 1/2 16 QAM 3/4

MCS

Avg

. Thr

ough

put

[kbp

s]

Sum of Throughput [kbps] Theo. Value [kbps]

Cell Capacity FTP DL

0100020003000400050006000700080009000

10000

QPSK 1/2 QPSK 3/4 16 QAM 1/2 16 QAM 3/4 64 QAM 1/2 64 QAM 2/3 64 QAM 3/4 64 QAM 5/6

MCS

Avg

. Thr

ough

put

[kbp

s]

Sum of Throughput [kbps] Theo. Value [kbps]


2.6- BS Sectors Drive test (Site Health Report)

2.6.1. Description

The RNE (RADIO NETWORK ENGINEER) on Site doing the Audit has to perform theDrive test (or at least do the post processing of Such Drive test log files for the onAIR sites in Monaco telecom NW in Burkina), keeping in mind that the drive test canreveal lot of problems, such problems can be;

Loose jumpers/connectors Feeders with Bad VSWR Antennas Pattern deformation problems Cross cabling in the BS feeders connection Blocked/poor sectors coverage Wrong Declaration in the Operation& Maintenance centre


1 RNE (RADIO NETWORK ENGINEER) (ALU engineer), Monaco telecom RNE(RADIO NETWORK ENGINEER) on SITE, 1 Driver.

Car, Car Power inverter, external Car antenna, GPS (serial port or USB),Calibrated CPE, Laptop, SMA RF cables, Patch cords.

Tools: X-CAL, X-CAP (or equivalent used by Monaco telecom team), Map info,MS Office.

Required to check each and every Sector from the field for the followingIndicators;

RSSI CINR routes & Pie chart TX_PWR MCS DL throughput RSSI & CINR correlation


2.6.3. Deliverables

A detailed SHR report is to be delivered for each site (3 sectors in case of 1X3 andmore for more) with all the data collected and post processed.

Figure 16: Sample SHR Data

Through the SHR reports the RNE (RADIO NETWORK ENGINEER) on site doing theAudit (3rd Party – ALU engineer) can see the problems from the field.


2.7- WIMAX NW Monitoring & QOS Follow up

Through this activity, the Quality of service throughout the WIMAX RAN network willbe monitored by means of collecting and analyzing the relevant QoS indicators,implementing tools and executing specific scripts.

The aim of this activity is to provide a comprehensive and statistical view of thenetwork QoS (and it all depends on the Scripts used by Alvarion RAN vendor).

2.7.1. Description

Daily alerter monitoring

The purpose of the daily monitoring is to detect sudden peak of QoS degradation,which occurred during one day, and to propose a fast reactivity the day after.

Daily indicators are consolidated and analyzed per area in order to track peak andsudden QoS changes.

In addition, a daily worst cell list is issued and analyzed every day with the mainQoS indicators from different interfaces: BS, ASN GW, AAA, etc…

The listed worst cells are then deeply analyzed with: QoS tools Drive tests

Then, corrective actions are proposed/validated/implemented and followed up.


The RNE (RADIO NETWORK ENGINEER) on SITE doing the Audit with the help andthe support of the On site local team of Monaco telecom;

Create a dashboard to identify worst cells on each topic Correlate different indicators from different interfaces to detect the

problem source Trigger the proper actions and follow-up of the open points Reporting on the monitoring evolution Propose/implement/validate optimization tasks defined above

Alvarion QOS tools & Scripts, MS office.


2.7.3. Deliverables

This QOS Follow up activities is reported daily & weekly with the followingdocuments:

DeliverablesDaily & weekly report with all of the following chapters,

Traffic Evolution (Traffic, Cell Load, User Figures & Air interface MCSutilization…etc)

QOS (Attach_Succ_Rate, Session_Drop, Attach_Failure_Causes,Attach_Avg_Duration, Attach_Setup_Avg_Duration…etc)

CPE Measurements (RSSI, CINR, TX_PWR, …etc)

Depends on the Availability in Alvarion RAN vendor Scripts


BSHIGH

TRAFFIC BSLOW

TRAFFICS022BS2 9.92G S030BS1 0.00B

S012BS3 9.55G S036BS1 0.00B

S021BS3 9.48G S036BS2 0.00B

S016BS2 9.37G S036BS3 0.00B

S013BS1 9.31G S011BS2 1.18G

S012BS1 9.25G S016BS1 1.48G

S004BS2 9.24G S016BS3 1.82G

S013BS3 9.20G S031BS1 1.83G

S014BS1 9.18G S002BS3 10.32G

S008BS3 9.12G S006BS2 10.89G

Traffic Top Highest & Top Lowest Lists


Figure 17: Sample Weekly WIMO report Data (Alarms & NPO KPI’s from ALU solution)

With all of the above data combined, the RNO engineer in charge of the Activity canexactly track all the problems in the NW (HW & Radio problems) and henceestimate their corrective actions and follow up with their Effect on the NW qualitybefore and after the corrective actions.


3- IP CORE NW Audit Activities

The NW at the core of the WIMAX NW is basically all IP Connected, hence the IPconnections between the different Nodes and different Servers in different VLAN’sand using different Routers could lead to IP loops and Other issues which mightcause NW Elements outages, hence it was mandatory Audit the IP Core NW in theWIMAX NW for Monaco Telecom in order to secure the Commercial Launch inBurkina Faso & Cameroon.

Figure 18: Sample WIMAX NW E2E Architecture Diagram showing the IP Core NW

3.1- IP NW Problems History vs. IP NW Design Audit

3.1.1. Description

Based on a clear definition for the problem by the customer’s Technical Team onsite, the IP Engineer from Alcatel-Lucent will start the following steps;

Auditing the High level Design for the NW Tracing the Nodes and the connections Collecting traces at different nodes and levels in the NW Auditing the Low level Design for the NW Auditing the Routing protocols used Auditing the Switching Protocols used



The following requirements will be needed on site;

1 IP Engineer (ALU engineer), Monaco Telecom IP engineer on SITE. Historical Traces for any problems appeared in the NW. Access to all IP Nodes and ability to collect traces from any suspected nodes.

3.1.3. Deliverables

A detailed report with all the problems in the IP NW design will be delivered toMonaco Telecom technical teams and up on their GA (Go Ahead) a report forproposals for correction Actions will be delivered to the team on Site and will beimplemented to the NW elements with the support of the Alcatel-Lucent IPEngineer on SITE doing the Audit.


END OF DOCUMENT

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Monaco Telecom - WIMAX NW Audit_SOW _ED02