Mahmoud Ashmawy

848-***-**** adi2h8@r.postjobfree.com

Permanent Resident / Green Card holder

QUALIFICATIONS SUMMARY

An RF/Wireless/Modem Test Engineer with 4 years of expertise/experience in Telecommunication & Networking industry.

Expertise and experience in RF Performance Analysis, RAN Data Analysis, Comprehensives Optimization reports, Log files analysis & Reports, Rollout and Analysis of NB-IoT RF network infrastructure and Site build Scripting

Deep understanding of RF Signal propagation, Site design, deployment for 4G/5G LTE and CDMA technologies.

Strong understanding of 5G concepts such as Hybrid Beam forming, Massive MIMO, Network Slicing, New Waveforms, LTE-NR interworking & co-existence, SA, and NSA network architecture, 5G Numerologies

Deep understanding and deployment expertise of LTE: Call flow, RAN Architecture, Protocol stack [RLC, MAC Controller, MAC Scheduler, Physical Layer], Carrier Aggregation, VoLTE architecture, IMS registration call flow, handover process, IMS Core entities (P/I/S-CSCF, HSS, SLF)

Proficient with Concepts of Data Communication, Digital Communication (Modulation, Multiplexing, Sampling, Noise figure, circuit switching, packet switching, Link budget calculations).

Good knowledge of Radio network KPIs for Accessibility, Retain-ability, Mobility, Availability and Utilization

Strong in Radio Network Optimization & Resource Sharing Techniques (CDMA/WCDMA/OFDM/SC-FDMA).

Strong regression testing experience in new development models to minimize bugs for ship approval to network carrier.

Proven ability to work with people of diversified backgrounds and deliver results, Optimization of systems and test engineering. Intrigues by complex engineering problems and different approaches to it with concise decision making.

TECHNICAL SKILLS

Languages: Strong in Python, MATLAB, Data Structure. Knowledgeable in Java/JavaScript, HTML, SQL, C++, Web Programming.

Network Protocols: SIP, TCP/IP, ICMP, DHCP, DNS, SSH.

Switching: VLAN, VTP. Knowledgeable in Network & Routing like RIPv2, ISIS, EIGRP, OSPF, BGP, MPLS, NAT, IPSEC.

Tools & Platforms: Atoll, QCAL, Windcatcher, QXDM, QPST, QCAT, Shannon, Wireshark, Odin, Ericsson ENM/AMOS, OSS, NETACT (Nokia, LSM (Samsung), GSM, UMTS & LTE OSS, (ALU), Tableau, Trips, JDSU, X-Cal, QXDM, QPST, X- CAP, Q-CAT

OS: Windows XP, VISTA,7,8,10, Linux/Unix, Mac OS

LAB Equipment: Oscilloscope, Network Analyzer, Spectrum Analyzer, RF test equipment.

Documentation Tool: Microsoft Word, Excel, PowerPoint.

PROFESSIONAL EXPEREINCE

SAMSUNG, LTE/5G Software Test Engineer, Overland Park, Kansas, Consultant July 2020- Present

Evaluating/Testing Features for LTE / 5G /mmWave bands on SAMSUNG devices for Sprint, T-Mobile, Verizon.

Ensure that the testing is carried out as per the defined standards and procedures.

Perform software testing in all phases of the design-develop-test-release-maintain software life cycle Requirements/Qualifications

Detect and track software defects and inconsistencies.

Conducting different test cases related to 5G attach-detach, mobility, leg switch, EN-DC carrier aggregation, LTE only mode, throughput, VoLTE, different operators and their bands, HPUE, different modes of tethering, MIMO, QAM, etc.

Creating test designs, processes, cases, and test-product documentation. Detect & track software defects & inconsistencies.

Analyzing the testing results and submitting the report to the development team

Platform utilized: QXDM, QPST, Shannon, QCAT-Wire shark. Specifically utilized diagnostic tools such as QXDM to collect logs, Umetrix Data for throughput and collecting on-device logs.

SPRINT, 5G / LTE / RAN Analyst Engineer, Overland Park, Kansas Consultant Feb 2020 – May 2020

Site analysis with Tableau.

Performed detailed short/long term KPI monitoring and analysis. Identifies discrepancies and determines Root-Cause.

Created Excel Macros, used Excel to create Pivot Tables, Pivot Charts, lookup, and other formulas for Data Analysis.

Prepared PPT’s and market level analysis to client with the Detailed Block Calls and Call Drops/Negative Call Analysis for VoLTE and LTE Calls based on the IMS messages, log Trace messages, layer 3 messages. (IMS SIP Bye, IMS Cancel, paging issues, etc.,).

Evaluated and mitigated potential coverage or interference problems. Performed network analysis and troubleshooting

Responsible on daily availability top offender analysis Central Region & daily Missing Cells for Central Region.

Identified optimization options and tower location needs for new cells. factoring, performance, capacity, and population.

SAMSUNG, RAN/LTE Engineer, Schaumburg, IL, Consultant Apr 2018 – Jun 2019

Worked as NH team member for Samsung CDU30 and M-MIMO deployment projects for sprint. Site analysis with Tableau.

Responsible for tracking and maintaining the performance of each eNB after migration and determine any discrepancies by identifying top offenders in KPI’s using Samsung LSM tool.

Created Excel Macros, used Excel to create Pivot Tables, Pivot Charts, lookup, and other formulas for Data Analysis.

Prepared PPT’s and market level analysis to client with the Detailed Block Calls and Call Drops/Negative Call Analysis for VoLTE and LTE Calls based on the IMS messages, log Trace messages, layer 3 messages. (IMS SIP Bye, IMS Cancel, paging issues, etc.,).

Evaluated and mitigated potential coverage or interference problems. Performs network analysis and troubleshooting.

Involved in all migration roles and responsibilities from CIQ creation, site scripts, traffic check and parameters Audit, site optimization and NH report submission.

Provided complete optimization techniques for optimal site/cluster performance (antenna selection, tilts, neighbor list, parameters, tools, and audit process),

Developed migration and eHRPD scripts required for Config FDD+TDD before migration and audits for NBR, PLD and eCSFB after migration. Utilized MapInfo to collect cluster information.

Ran LSMs dumps (Unix/GUI) after updating eNB lists and pulling inventory data files.

Provided NH troubleshooting as needed and track RF ATP and No Harm acceptance.

Created and managed Customer Information questionnaires (CIQ).

Worked with the DT team, Implementation and Operations Teams on the cell site’s antenna and RF equipment configuration, database parameters and doing Visual Check for the site.

Performed ATP on 700, AWS-1, AWS-2, PCS, PCS-2, 850 MHz bands & E911 testing.

Created/drafted route map for cluster drives & link Budget testing using tools like google earth, MS Street & Trips.

Setup, calibrate, maintain, troubleshoot various testing equipment depending on the testing scenarios & maintained a detailed inventory of each test equipment used in the NE market.

Communicated with RAN commissioning team & worked closely in resolving site issues by suggesting parameter changes.

Worked extensively on NBIOT & EMTC by using QXDM, QPST, QMI Test Pro & benchmarked the results before & after.

Post-processed & created detailed documents on data obtained from ATP & cluster drives using X-CAP, XRO & Q-CAT.

TTS Wireless, LTE Design & Performance Engineer, Dallas, TX, Consultant Jun 2016 – Mar 2018

Worked for T-Mobile in multiple markets. Performed detailed short/long term KPI monitoring and analysis.

Worked on site performance to ensure it meets KPI.

Checked Cells degradation and Traffic loss and make first Troubleshooting before escalating.

Checked RET’s, Alarms for LTE, UMTS, GSM / Lock and Unlock Cells / run Site Parameters/ trace site problem from log history.

Responsible on site pre-lunch till activity done then push site to post lunch then close site out if it has good KPI.

Performed Close Out, degradation & KPI daily reports, troubleshoot, set parameters, correct the RET's, Check RIOT & E911 Calls.

Utilized TPIM, RIOT, CBN, Tick insight, AMOS, IMNOS, Ericsson OSS,2G commands.

Reviewed LTE Nokia SCOP, Construction Diagram (CD) and Create CIQ for Multiple T-Mobile Markets to ensure that GC team are following Design according to Port Matrix and Plumbic Diagram in RFDS.

Modified RFDS on RFDS national Tool for different Configuration, Technologies & Set it to LB based on real current configuration.

Worked with Different type of Antenna (Dual-Quad-Hex for lower, Main and Combination band)

Utilized NetAct, Nokia RBS, site Query Tool, National RFDS Tool, TPIM, BTS Manager, prepare a propagation budget using Atoll.

Completed RF optimization of wireless network by completing Drive Test for AT&T LTE Network., VLOTE Call Scenario, CSFB Call Scenario, DL throughput test and UL throughput test.

Completed Excel report by using Vlookup, Pivot Tables, Countif and many other conditional formatting & formulae along with Macros to perform repetitive daily task.

LCC Inc., RAN / RF Engineer, Jacksonville, Fort Meyer/Florida, Consultant Aug 2015 – Jan 2016

Worked on 1900/800 and 2.5 LTE performance and optimization for Ericsson, Nokia, and Samsung

Used test equipment (XCal) to collect cluster drive data in the Ft. Myers market to measure RSRP, PCI, intra/inter handovers, identify call failures and drop calls, and confirm LTE throughput speeds as requested from the local RF Lead.

Implemented parameter changes on the Ericsson 1900/800 LTE platform as requested from the local RF Lead Engineer

Used RF tools (Xynergy, Wincatcher, WiGuru, Map Info) to analyze performance KPI (CDR, CFR, and throughput) to improve LTE network reliability and troubleshoot customer complaint issues.

Ericsson Cairo-Egypt Jan 2007 – May 2015

Job Title: RAN Support Engineer

Acting as Team Lead .

Working and Troubleshooting on Customer Complains and Network KPIs degradation.

Testing (TEMS, Spectrum Analyzer). Tracking packet and Analyze using Wireshark.

Integrations and Troubleshooting for the new Ericsson 6102 cell sites equipped with DUL, DUW and DUG for 4G LTE, WCDMA and GSM technologies

Script creation, SW Upgrade, License installation and LTE integration.

Checking and solving problems with RSSI, VSWR and TMA voltages on Feeders for the new sites

Citrix Neighborhood to manage OSS and declare new sites, run Relations scripts, Use Element Manager to read and modify eNodeB and NodeB configurations

Running scripts to declare new MO s into the site and saving CV s

Troubleshooting on new eNodeB sites, declaring new MO s or deleting MO s,

Troubleshooting of the alarms and clean-up of present errors during integration.

BTS integration, expansion, rehoming, upgrade software, change parameter, MO handling, Implement SW correction packages (Upgrades)

Integration of the Ericsson DUG, DUW and DUL Integration of the Ericsson DUG, DUW and DUL

Implement ZTE major, minor and immediate CRs. Troubleshooting ZTE alarms Support for RF Team taking care of the configuration of the RBS to minimize KPI s issues configuring Powers, Loss and Delays against CIQ.

Execution Radio Parameters on Network. Abis/IP Migration /Abis.Optmization Migration

S/W upgrade/LAC Splitting

EDUCATION

Bachelor of Engineering in Electronics & Communication Engineering Aug 2010 – May 2015

Helwan University, Egypt

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