4G LTE 5G Telecom IP Multimedia Subsystems IMS RAN Core Network

Arif M. Mithaiwala

TELECOM – TECHNICIAN ENGINEERING Electrical / Software / IT / Test / Field / Tech / Support / Engineering

P.O. Box 706 Maple Shade NJ 08052

******@***.***

Landline: 847-***-****

Mobile: 847-***-****

www.linkedin.com/in/ArifMM

SUMMARY

PLATFORMS - Windows 98/2000/NT, A+ Certification knowledge.

UNIX – Solaris - KSH & BOURNE shell - UNIX INTERNALS – Basic scripting.

PROGRAMMING - PERL, ‘C’, BASIC, Excel

NETWORKING - STRONG KNOWLEDGE OF NETWORKING - Data Transmission, Packet Transmission, Internetworking & Network Applications.

TELECOM TEST EQUIPMENT/TOOLS/APPLICATIONS -RadioComm, Datalogger, Multimedia Workbench, RSD, RTA, AOL logging. Spectrum Analyzer, Communication Testers, Wireless, XCAL

Simulator, Bluetooth, Bugzilla, Jira, ClearCase QPST Service Programming. IRISView, Snooper QXDM Wireshark.

Anite, Agilent, Spirent ADB & Logcat

STANDARDS Tested Electronic Components based on ISO 9000-9001 compliance. Familiar with wireless Standards IITU-R IMT-2000, 3GPP – [ UMTS – Rel 99 & Rel 4 thru 12 – HSPA – LTE ] & 3GPP2 [ CDMA / WCDMA – CDMA 1xEVDO ] & Organizational Partners ETSI & IEEE 802.1x standards. DOCSIS LTE and 5G

Sound knowledge of Software Engineering, Test Engineering, Software Quality Assurance, Agile and Waterfall SDLC & testing

and Experimentation heuristics, principles and processes.

Well versed with GSM/CDMA/UMTS/LTE/WiMax/IMS Network and Mobile systems Test/Field

Engineering. IEEE WCP Wireless Mobile Professional Certification knowledge

WIFI - DOCSIS RF Cable Modem Standard. Devices, CMTS, CM, EMTA and eDVA Knowledge and experience with Wifi 802.11a,g,n,ac standards. Troubleshooting of Wifi cable modems. Public and home Wifi functionality of Comcast cable modems - Arris and other products and legacy products. Experience with Comcast Wifi certification. Sound knowledge of WIfi Architecture - distribution system, CMTS and servers and WLAN Radio communication and security aspects. WLAN Design and Implementation and Surveying and troubleshooting. IoT machine device testing. Inter-RAT Handovers - 4G LTE to Wifi Handovers. Verification of Modem Registration procedure with CMTS – Channel Lock, DHCP, ToD, TFTP & Registration

4G TECHNOLOGIES, ARCHITECTURE & PROTOCOLS - PTCRB Certification Requirements and Tests Manual Handset Testing experience. Well versed with 3GPP 4G LTE protocols, Registration procedures, log analysis, KPIs – Conformance Testing, AT Commands, LTE EPC Elements – PGw, SGw MME – User / Control Planes, interfaces, functions, MIBs/SIBs & IEs, RACH procedures, Default/Dedicated Bearer, RRC messages, protocol stacks of UE/eNodeB/MME, PHY, RLC & MAC Functions. OFDMA frame and Resource Block and Bandwidth. Cell ID PSS SSS calculations. Registration Call Flow, Channel Mappings, Initial Access Procedures and Android – ADB shell & Unix commands. Experience with SIP, IMS and VOLTE and Carrier Aggregation. Well versed with Log Analysis

5G TECHNOLOGIES, ARCHITECTURE & PROTOCOLS - AMF, AUSF, SMF, UPF, UDM, PCF & AF, NRF, NSSI & NEFservices. Virtualization and network slicing. Identifiers and procedures. Voice over 5G & IMS. Security procedures and air interface. Well versed with 5G NR theory.

Knowledge of SDLC Agile, SCRUM, Waterfall

Insightful, results driven. Successful and timely completion of projects. Systematic and efficient approach to technical work.

Excellent verbal and written communication skills.

Letters of recommendation from engineering school and managers

Currently Available Immediately

WORK EXPERIENCE

5G NR Test Plan Lead Engineer Coordinator – 100% Remote

VERIZON, Bedminster, NJ

October 12th 2022 – August 16th 2024

- 5G NR Test Plan Development and Requirement Plan analysis.

- Coordination of Package Release of all Test Plans and Requirement Plans tagged for specific markets and categories.

Database queries and analysis in Excel. Co-ordination with OEMs - Samsung

- 5G NR Test Plan co-ordination - IMS Field and Test Requirement and Plan design

- VONR Test plan design, Field Test Plan creation

- Tests for Inter-RAT Handovers – TDD to FDD, 5G to LTE, LTE to Wifi and 5G to Wifi

- Samsung markets IP Multimedia Subsystems – IMS Field and Lab IOT testing

- Meetings with Samsung for Test Plans and Requirement Plans releases for IOT Lab and Field Testing

5G NR Test Engineer

COMCAST, Philadelphia, PA Tech Mahindra

November 23rd 2021 – July 22nd 2022

- Lab Testing of Samsung 5G NR gNb and Radio using Keysight’s Airmosaic Testing Platform

- Analysis of Wireshark logs for layer 2 RLC & 3 RRC messages and IEs for connectivity, performance, and various

Samsung defined features – over 50 features and test cases.

- Keysight equipment - SDRs – Software Defined Radios emulating the UE, Linux based UE Simulator Servers, and

configuration of Cells – N48 CBRS and N71 - with the Airmosaic platform and eLSU server. Simulation of Handover

procedures, Radio Link Failure Re-Establishment, Connectivity, Throughput, SSB configurations etc and verification in

Wireshark layer 2 & layer 3 logs.

- Configuration of Keysight and Samsung Core for various test cases. Configuration of parameters in gNb using Samsung

platform USM for test cases

- Detailed daily reporting of test results. Defect reporting – Jira

- Testing done on Samsung Equipment – BBUs, Cu’, Du’s and Radios configured with MIMO with Samsung tools

LTE Network Engineer

SMART SKY NETWORKS, Sterling VA Amititech LLC

July 26 ’21 – Nov 4th ’21

- Configuration and integration activity of LTE network – access and core network – eNodeB baseband units and radio

Antennas. Implementation of method of procedures.

- Linux based environment. Tool XSHELL to control Linux-UNIX based BBUs baseband units and RRHs radio antenna and

Peripheral equipment. 6 to 12 sector cell sites.

- Upgrade of enodeb baseband units and radio antenna software remotely. Linux commands. Support of onsite

technicians.

- LTE Equipment is for implementation of airborne LTE connectivity in airplane. Supported flight testing by monitoring

Logs in real time for performance - SINR, RSRP, QCI, S1-AP, GTP-U and GTP-C and throughput rate messages generated

by Linux commands. Handover and tracking area update monitoring. Context release monitoring. Logs integration and

upload to cloud storage. Remote enodeb and radio control. Core Netowork logs – EPC MME S1-AP S1-MME & RRC logs.

- Retrieval of Baseband unit logs via Python script automatically and manually using unix-linux commands ssh, scp etc.

- Control of radio antennas via web based access to turn radiation on and off to control radiation for test scenarios.

- Write up of report of flight LTE network performance analysis.

Tester

T-MOBILE, Philadelphia, PA Further LLC

March 3rd ‘21 – March 15th ‘21

- Testing of E911 PSAP calls on different bands on T-Mobile 4G LTE 5G network.

Test Engineer

CHARTER COMMUNICATIONS, Denver, CO Tech Mahindra

Feb 20th ’20 – March 25th ’20

-IOS and Android device certification. Charter Wifi to Charter owned LTE network - non-licensed bands handover testing. Wifi Home and Commercial Wifi Testing. Verification of 8021.11(r) & 802.11( k) and applicability of 802.21 MIH ( Media Independent Handover ) standards for handover to LTE

-Analysis of KPIs delay, rate, RSSI, Packet loss, SNR & Captive portals.

-Connection Manager Charter’s proprietary app to control handover criteria – MIH

-Software Regression and functional and performance testing. Inter-RAT Handovers - LTE to Wifi Handovers

Test Engineer

CRESTRON, Rockleigh NJ Altran

Sept 2019 – Nov 2019

-Unified Communication product applications – Teams and Skype For Business – performance and usability – requirement based testing. Exploratory testing. Performance testing of UC and AV peripherals.

IBM PC Microsoft based software upgrades. Ethernet connected monitors and peripherals functional testing.

Configuration of software systems.

-Driver tests. Cloud based control tests. Logs. Bug filing – Jira

Test Engineer

COMCAST Inc, Moorestown, NJ Infosys

Jul 2017 – May 2019

-Cable Modem – legacy & retail devices – Arris, Cisco, Technicolor, RF & performance testing. DOCSIS protocol

-Test cases / modules setup for performance, sanity and regression testing for software releases. Triage and Troubleshooting.

-Verification of Modem Registration process with CMTS - Channel Lock, DHCP, ToD, TFTP & Registration

-Testing in Production and lab networks. Firmware upgrades

-File Servers. SNMP - MIBs commands.

-Wifi Certification Tests – HGM database tests. GRE tunnel failover tests. Wireshark pcap log analysis. Throughput versus Range iPerf tests. Chamber Tests. RF Isolation Tests.

-Erouter tests. DMZ, Port Forward Firewall tests. Bridge mode tests. FTP server tests.

-MTA phoneline provisioning. Logging into CMTS and CMTS commands.

-IMS call testing and SIP logs. HP Alm test repository and Jira to document test failures & change requests.

-Wireshark logs analysis for MTA voice tests – RTP stream - HD, non-HD voice calls & data streams.

-Tools Teraterm, Putty, SSH

-Regression and user story requirements functional and UAT testing – Agile & SCRUM SDLC testing - of Xfinity Connect App functionality – Email, Voice & Text.

Integration Technician

ZONES Inc, Carol Stream, IL

Oct 2016 – Nov 2016

-Integrated Laptops and Servers for different clients. Updated Firmware.

-Configured Networking – installed NIC cards, configured motherboard.

-Generated paperwork for each project. Entry of Shipment paperwork in system.

Audit IMS Engineer – 100% Remote

ALCATEL LUCENT NOKIA, Naperville, IL

Nov 2014 – May 2016

-Creation of data files for IMS – IP Multimedia Sub-systems network elements – Ieccf, SCG – Service Continuity Gateway, CTS- Call Telephony Server.

-Configuration parameters –System and Network parameters - IP4 IPV6 LAN port and other IMS configuration parameters for auditing of live elements - Ieccf, SCG, and CTS – Protocols SIP Call flows parameters and other configuration information.

-Analyzed log files and retrieval of configuration parameters from Lab – Unix and GUI

-Reviews of Method of Procedures- MOPS - for field implementation of IMS elements.

-VOLTE call parameters.

Technician

MOTOROLA, Schaumburg, IL

Mar 2014 – Aug 2014

-Repair and configuration of two way radios.

-Use of Oscilloscope, Signal Analyzers for testing of radios per signal and other Quality related specifications.

Test Engineer

MOTOROLA, Libertyville IL Tech Mahindra

Aug 2013 – Nov 2013

-RF and applications testing of 3G / UMTS / LTE handsets for Verizon, AT&T and T-Mobile.

-End to End Testing of VOLTE calls. PHY MAC RLC PDCP S1-AP layer testing.

-Regression performance software testing. Drive testing for call performance and throughput.

-PTCRB compliant tests.

Test Engineer

AT&T, Elmhurst, IL

May 2013 – May 2013

-LTE / 4G and IMS VOIP / Volte Call performance testing – Snooper Tool for registration parameters – trace & logs

-QXDM Pcap logs for Wireshark. Registration procedures.

-IMS training – A grade – IMS Call testing. Voip testing.

-IRISVIEW Tool for session analysis and call trace between Call State Control Function Servers.

-SIP Signalling between S-CSCF & MGW / MGCF/ SGW & BGCF. Familiar with IMS network elements.

-Chicago & Minneapolis – Ericsson & Lucent MSCs RF Performance and Troubleshooting and CRs.

Test Engineer

VERIZON WIRELESS, Boston, MA

Jun 2012 – Sep 2012

-CDMA and EV-DO test equipment Agilent BTS – e-Node B emulator and Channel Emulator, Network Emulator, Faders, Switches and PDSN.

-Software applications for CDMA 2000 1xRTT Format and EV-DO Format. Analysis of related TIA standards and IMT-2000 standards and CDMA2000 IOT test standards.

-UNIX adb shell work. PRL files modification - parameters SID NID & Configuration files. Method of Procedure and reports of test results. AT commands

-RF conformance and performance testing for RF mobiles and modules. Test Reports. PTCRB Pre--Certification testing projects for machine to machine CDMA and EV-DO modules. RF Parametric Data throughput tests. Mobile IP testing.

Test Engineer

AT&T, Hoffman Estates, IL

Jun 2011 – Feb 2012

-Software Performance testing. Brew/Windows/Android – Device Testing – Pantec, Motorola, HTC

-Field/Drive/IOT Testing & Lab Testing for WCDMA/UMTS/LTE & 2G/3G performance testing.

-Testing involved - AGPS, E911, Handover, Wifi, CIQ client tests, Multi-RAB, E-DCH, JAVA.HSPDA - LTE- FTP/UDP/HTTP upload/download tests.

-Tool "Metrico" for untethered test cases.

-Untethered/Tethered data performance and non-data performance tests.

Device Test Engineer WiMax

SPRINT, Washington DC

Aug 2010 – Sep 2010

-HTC Hardware - Performance Testing – TCP / UDP throughput characterization on Samsung, Motorola & Huawei RANS - Receive Sensitivity – External Wifi Interference tests – Mobility Management Drive testing – Longetivity – Latency testing. IOT Testing. ADB shell

-XCAL WiMax tool – Layer 3 Wimax signal analysis. Used Spectrum analyzer and XCAL at BS ports [ in Lab ] for WiMax modulated signals. UNIX based HTC PC Suite

-Analyzed WiMax Test Reports. Used Wireshark for DHCP messaging and Latency and NE testing. Drive Testing 3G / 4G performance.

Device Test Engineer

CELLULAR SOUTH, Jackson, MS

Apr 2010 – May 2010

- Analysis of network scripts and generation of script files – network parameters.

-Communication with OEMs, developers and network personnel.

-Testing CDMA EVDO mobile functionality. Software functionality. Drive testing – RAN A-12 authentication testing, OTAP tests. 3G / EVDO service functionality testing.

Tester

HARRIS CORP., Lynchburg, VA

Jan 2010 – Jan 2010

-Windows based console setup for two way Radio RF communication system. Performed tests on UNIX servers.

-Installed the UNIX operating system on component server of the system.

-Performed testing for functionality of software – networking functionality tests.

-Performed analysis for consistency in release documents and test cycles

Test/Field/ Integration Engineering

MOTOROLA, Chicago IL

Jan 2005 – Feb 2009

-Performed software/systems Testing- Validation activities for WiMAX software releases.

-Pre-box functional testing – Handovers, network entry of MSS MSS configuration and RF testing. UNIX based servers.

-Pre-integration and integration test activities for the Izar CR R2.73.1 program – requirement specifications reviews for the gates/stages of cycle. Testing - SW Metrics - User Trial 2G and UMTS W-CDMA mobiles.

-System/performance testing of GSM phones - software requirements and software release notes.

-Analysis of tests and base station logs for failed tests and root cause analysis using layer 3 logs information. Analysis - call tracing in OMC and Handover analysis at MSC. Stress testing ROM code installations.

-SW metrics CR tracking. - Root Cause Analysis using layer 3 log information. Supported activities for the STRR-System test readiness review - Field Test stage testing for VERIZON Project.

-IOT tests. RF performance and regression and error reports.

Field Engineer at Motorola / Verizon

-Performed transmit RF calibration and audit tests of transceivers at 3 sector sites for all carriers using LMF controlled test equipment, - implementation of EVDO - in the Sacramento CA VERIZON Wireless market.

-Commissioned 27 sites for Verizon.

-Validation activities for BTS

Prior to 2005 worked on various contracts in the capacity of Test & Field Engineering:

-LUCENT TECHNOLOGIES Naperville, IL Test Engineer - 2000-2001 - 5ESS telecom switch - UNIX

-MOTOROLA Schaumburg, IL Test Engineer - 1999-2000 - iDEN - PCS - OMC - BTS testing

-APPLIED TELECOM Lisle, IL Test Engineer - 1999 - Validation multiplexer board - SONET - Parameter Register mappings

-METHODE ELECTRONICS Chicago IL Test Engineer - -1998 - TX RX tests Fiber Optics Transceivers

-MOTOROLA McHenry IL Test Engineering Technician - 1997 - CDMA BTS RF TX RX testing.

-SCHLUMBERGER GECO-PRAKLA Dallas, TX Software/Systems Engineer - 1995-1996 - Designed a Software tool to time Radio Seismic Data Acquisition process.

-INTERVOICE, INC. Dallas, TX - Programmer Analyst -1993-1994 Modification of Telephony Voice Response Systems.

ADDITIONAL INFORMATION

-April 4th – June 12th 2017 – Worked at Measurement Inc as Grader. Grading of High & Middle School Exam Papers

-Aug 2016 - June 2017 & Nov 2012 - May 2013 & Jan 2011 - June 2011 - Worked part-time at Walmart Inc as Sales Associate

-Oct 2009 - Nov 2009 - Worked as AOI Inspection Technician at Plexus Inc

-2002 - 2004 Worked on various temporary contracts in retail, as exam paper grader & technician through agencies.

-May 1992 - Dec 1992 Worked as Component Engineer prior to graduation at Magnetek Inc.

-Comcast work was on several projects through full time employment with services agency company.

-Charter work was called off due to virus

-Worked temporary work March 3rd 2021 to March 15th 2021 on E911 PSAP call testing.

-US CITIZEN

-Available Immediately.

EDUCATION

Bachelor of Science, Electrical Engineering (BSEE)

PURDUE UNIVERSITY, Fort Wayne, IN

– 1992

Major GPA: 3.4/4.0; Overall GPA: 2.8/4.0

An “ABET” ACCREDITED PROGRAM

RELEVANT COURSES -Communication Systems & Lab (A, A) Microprocessor Sys & Interfacing (B)

Programming (A’s & B’s): BASIC, ‘C’, Assembly, PSPICE, MathCAD

DESIGNED AN IBM PC BASED AUDIOMETRIC SYSTEM FOR THE HEARING IMPAIRED USING ‘C’, DOS, DATA ACQUISITION, DSP & SIGNAL ANALYSIS.

(Design Project)

DEANS LIST & HONORS LIST IN JUNIOR AND SENIOR YEARS

Recent Courses:

5G Technologies, Architecture & Protocols, 4G Technologies, Architecture & Protocols

Software Project Management, Agile Business Analysis & Fundamentals Of Business Analysis

Wifi 802.11 WLAN And PAN Radio And Networking Fundamentals

Personnel - Engineering Manager

Dear Ma’am/Sir,

I would like to apply for a position drawing upon Software/Systems/Telecom Test Engineering,

Quality Assurance or Field Customer Support Work or Test Management or Coordination.

I have performed engineering functions calling upon test engineering, field-customer support, and design engineering and network engineering. I have done this work with sound analysis & application of the pertinent theories involved.

My recent projects have been with 4G LTE and 5G NR. I have taken courses in 4G LTE and 5G and as such have sound theoretical knowledge of the architiecture, network elements, protocols and interfaces of the systems. I have worked on Lab Test Engineering and Test Plan Development and Test Plan Package Releases to Vendors.

I worked on VOTLE and IMS – IP Multimedia Subsystems – with configuration of network and system parameters of the CSCFs – Call State Control Functions – within IMS. I have worked with network and device testing and data work. I have experience with SIP for IP Multimedia – IMS - and related protocols.

I am well versed with the access technologies TDMA, CDMA, OFDMA and with mobile cellular architecture and design fundamentals – air access capacity and coverage, spectrum considerations and related KPIs and with KPIs related to Mobility Management – Registration, admission control, power control and handoffs.

I am well versed with the wireless access technology standards - 3GPP and 3GPP2 & related committees and standard organizations and the evolution of 3GPP based 2G, 3G, GSM, GPRS, EDGE, and UMTS. LTE and 4G, 5G systems and, the 3GPP2 based CDMA & EV-DO system and its several revisions.

Prior to this, I have experience with WIFI RF cable modem testing with the DOCSIS protocol. I have experience testing the Wifi Modems.

I have worked on Mobile Device Testing from the Wifi and LTE – 5G – Wireless perspectives.

I have worked with OEMs and Wireless Service Providers on different contracts.

I am well versed with networking engineering – Data Transmission, Packet Transmission, Internetworking and Network Applications and related wireless and LAN WAN networking concepts.

I have demonstrated the objectivity and judgment that test engineering calls for, by thorough

systems analysis and, comprehension of the criticality of the system/subsystem/modules being tested.

I have also worked in the capacity of field engineering, interacting with customers. I have very good verbal and written communication skills. I have worked in the customer service and sales areas on temporary assignments and other technical assignments in the retail as well as manufacturing environments.

I have worked on several field implementation projects commissioning of EV-DO where I commissioned and performed testing at many sites in Sacramento CA. I have set up the Billing accumulator for Motorola’s iDEN system

I am open to travel.

With regard to programming, I have worked with ‘C’ in the past. I am well versed with user level UNIX – ksh and Bourne shell and with Perl. I have done some programming & scripting work in the contracts I have worked on. I am well versed with SDLC - the software development life cycle – Agile and Waterfall – and have worked on regression testing and testing of user stories and requirements.

Recently, I have taken courses in networking, 4G LTE and 5G and Wifi Technology and also rudimentary courses in Software Project Management, Software Testing, Agile Testing, and, in Agile Business Analysis and Fundamentals.

An opportunity which calls for technical analysis and its co-ordination and basic management or a test engineering position, would be a very good match with my analytical and communication skills and my technical experience.

I am available immediately. I can work on W-2 or 1099 or C2C

Please contact me at mobile 847-***-**** or ******@***.***, if I can provide you with additional information.

Thank you very much for your time and consideration. Best Wishes.

Sincerely,

Arif Mithaiwala

Contact this candidate