Field Engineer Wireless Communications

Chandra Goud

Ph: 312-***-****

Email: *************@*****.***

SUMMARY

Wireless Communication Professional with 8+ years of experience in the field of Telecommunication. Performance, Testing, Implementation and Operations on 5G NR/LTE and WCDMA Wireless Communications Networks using several technologies, including LTE, IMS and VoLTE.

Proficient in using NOMAD for Audio Quality (MOS testing).

Experience with Qualcomm and Samsung Modem Chipsets and with AT&T, T-Mobile network operators.

Knowledge on analyzing the logs using tools like QCAT, APEX.

Hands on experience in Field Testing of IMS, LTE, WCDMA Mobile Handsets and different smart devices in Live Radio conditions.

Knowledge on tools like QXDM, QPST, QCAT, Nomad, Datum, Wireshark.

Extensively performed the VoLTE field testing for the Samsung IMS Solution.

Hands on experience of EPS/EPC and IMS network architecture.

Knowledge on Test Plans related to VOLTE, CDMA, VOWIFI, SRVCC, E911 and checked for Audio Quality(AQ), Signal Strength (RSRP), SINR, Video Telephony (VT), HO/HI.

Knowledge on features like CSFB, VoLTE, SRVCC, CA.

Hands on experience with all the regression test activities and all different kinds of throughput tests.

Actively involved in test activities with Samsung QA Team during product release.

Experience with SRIB India and Samsung HQ to manage and resolve open defects for different Modem chipsets within critical time frame.

SKILLS

Tools: QXDM, QCAT, QPST, IRTC, Mobile Analyzer, NOMAD, KPIATS, PDC, Dumper Tool, JTAG, EFS Explorer, QMItestPro, Artemis, Odin, XCAL, Mobile Datum, PC Datum, Wireshark, IMS logger, RDX, FTAT Manager, FTAT, RITA, IRAT, SPIRENT, IPMSG.

Wireless Technology: IMS, VoLTE, LTE, HSPA+, HSDPA, HSUPA, WCDMA, UMTS, Bluetooth, VOIP.

Networking: TCP/IP, UDP, HTTP, FTP, RTP, RTCP, SIP, SDP, IPv4, IPv6, OSI Architecture,

Platforms: Microsoft Windows XP / Vista / 7, Mac OS X, UNIX / Linux

WORK EXPERIENCE

Apple, Dallas, TX

Lead Field Engineer

April 2024 – Present

My daily job duties as a Field Engineer are to work on the test cases related to Volte, Vonr, VoWiFi, Wi-Fi to LTE HO, 5G/4G Data performance, SA, NSA, CA, MIMO and different internal features.

Develop and run test plan with focus on customer experience.

Identifying issues impacting HW/System performance and perform deep dive analysis.

Generate system performance test reports with key performance indicators.

Work with team members and 3rd party vendors spread across various time zones.

Check and compare the KPIs using the REF or if the behavior is not as per expected test case, file a Radar with my findings and explain in the radar with the logs, screen shots, screen recordings why it could be the issue.

Follow up with Dev/Carrier Teams on the Modem/Network issues.

I have gained the confidence and experience working on different projects simultaneously as per the priority basis.

I am enthusiastic to test, dive deep into the logs to figure out the behavior in case of pass and failure.

Nokia, Dallas, Tx

5G IOT Test Engineer (Sep 2021 – Mar 2024)

Test cases planning including reviews/analysis of feature specifications.

Test specification work including creating/updating/reviewing test documents.

Performed test cases in Nokia Lab for Qualcomm, MediaTek, Samsung.

Have done Installation, Commissioning and Integration of 5G GNB and 4G ENB in IOT lab environment.

Tested and reported faults for assigned test cases.

Fault Investigation/Reporting which included cooperation with customer teams.

Analyze logs and troubleshoot problems from the field and customer lab.

Provide remote and Onsite support to Nokia test

Lab maintenance which includes evaluating test tools and test equipment needed prior to each release.

Upgrading and building/expanding of work stations and 5G GNB/4G ENBs as needed.

Exposure on tools linked to the job like QXDM, Wireshark, EMIL.

Provided training to team members on new features/test equipment as needed.

Google, Mountain View, CA

Sr. Test Engineer (Mar 2021 – Sep 2021)

Worked on the commercial test simulators and test systems such as 4G/5G R&S (Protocol, Throughput, LBS Barometric system), CMW 500, Keysight (5G) for wireless telephony product verification.

Troubleshoot related device and performance issues on site as required; Manage resulting log files which can include reviewing for accuracy and content, and support report construction/generation as requested

Have knowledge in setting up the cabling connections for different combinations using splitters/combiners.

Have exposure on UE log analysis on Intra/Inter Frequency Handover during connected state Mobility, Redirection, Reselection concepts.

Handset test experience with UMTS/CDMA operators.

Hands-on experience on debugging and log analysis using QXDM, QCAT

Created detailed test plans, test cases, and test automation/ scripts to validate numerous features such as wireless connectivity, networking, audio, display, video etc.

QA modem and Multi-SIM test experience.

Hands-on Experience in executing and debugging carrier test cases such as AT&T, TMO across various specifications.

knowledge of 3GPP specifications and experience in LTE Air Interface, PHY, MAC, RLC, Radio Resource Control (RRC), PDCP and NAS layer, and showcase networking protocol knowledge (TCP/IP, UDP, ICMP, STUN, VoIP) protocols

Qualcomm, San Diego, CA (Nov 2019 – Feb 2021)

Engineer I

Responsible for validating Modem Software on Qualcomm VoLTE and LTE Chipsets.

Have understanding on PHY, MAC, RLC, RRC and PDCP layers.

Experienced in laboratory testing on Simulators.

Worked on LTE/NR Non-Standalone (NSA) and NR 5G Standalone (SA) projects.

Have knowledge on IMS/EPSFB call flows, E911 call flows, Throughput testing on different bandwidths.

Proficient in analyzing the UE issues and reporting it and track it with the JIRA.

Have understanding on 5G concepts like Massive MIMO, Beam Forming, LTE-NR interworking, 5G numerologies.

Proficient in LTE/NR and 5G NR feature testing: SU-MIMO, Mutiports CSI-RS, CDRX.

Knowledge on looking at the Lower Level KPIs and decide what exactly is the issue.

Proficient in LTE/NR and 5G NR service testing: EPSFB, E911, VoWiFi, IMS, VT, RTT.

Perform testing and analysis over LTE for advanced features such as LAA, 4CC with 4x4 MIMO.

Responsible for working with a multi-discipline team (Software Development, System Design, Customer Support, ASIC Design, RF Circuits and Hardware Design) to integrate, test and commercialize QCT products.

Have exposure on UE log analysis on Intra/Inter Frequency Handover during connected state Mobility, Redirection, Reselection concepts.

Cover mobility scenarios involving Link Adaptation, Redirection, Reselection and report on any RLFs/ Handover Failures during the mobility route.

Have understanding on LTE, EPC, IMS network entities like MME, SGW, PGW, HSS, PCRF, OCS, P-CSCF, I-CSCF, S-CSCF.

Execute tethered and embedded speed tests and deduce throughputs and peak performances.

Cover Certification, Performance, IOT and Regression Test Suites for Snapdragon SDM845, MSM8998, MDM9206, SDM670, SM8150, SM8250, SM7250 modems.

Troubleshoot and debug unique modem issues with Infra vendors

In depth analysis to find root cause of failure at L1/L2/L3 protocol layers.

Have worked different issues like RLFs, HO failures, Low Throughput, High BLER, RACH Failures.

Have knowledge technically and can deal with the Customers in explaining on any issues.

Experienced in taking up the calls with customers during troubleshooting/Site bring-up.

Qualcomm, San Diego, CA (Mar2018 – Nov 2019)

Field Engineer

Sound knowledge in advising and performing the test plans on Qualcomm chipsets.

Knowledge on tools like QXDM, QPST, QCAT, Nomad, Datum, PDC, Dumper Tool, JTAG, EFS Explorer, QMItestPro, Common Antenna.

Track the issues related to UE/Network using JIRA and assign it to respective teams.

Knowledge on backing up QCN’s, loading: New Builds, Qshrink, Engineering MPSS; Provisioning, loading ADB Properties, configuring NV’s on the device according to the carrier.

Support to the IOT team to capture logs for analysis of issues in live radio network by checking both the messages exchanged with the network and internal layers primitives at protocol level.

Performed Sanity Testing before proceeding with the test plan to make sure the chip set works as expected.

Knowledge on analyzing the logs using tools like QCAT, APEX.

Knowledge on Test Plans related to VOLTE, CDMA, VOWIFI, SRVCC, E911 and checked for Audio Quality(AQ), Signal Strength (RSRP), SINR, Video Telephony (VT), HO/HI on stationary locations and mobility routes.

Proficient in using NOMAD for Audio Quality (MOS testing) and gather POLQA scores.

Daily jobs include tracking and analyzing the issues, logs, daily reports and save it at the server location.

Working with multiple teams ATT/TMO.

Proficient in identifying and analyzing the UE/tool issues.

Sound knowledge on LTE, WCDMA, VOLTE.

Knowledge on using tools like KPIATS to test the performance of the chipsets on LTE, WCDMA, WIFI.

Samsung, Bellevue, WA (Feb 2017 - Feb 2018)

VoLTE Test Engineer

Sound knowledge of LTE architecture (EPC&RAN) interfaces and hands on experience on IMS, SIP, SDP, RTP, RTCP protocols.

Responsible for VoLTE Regression Test, issue reproduction, managing and coordination of Lab and Field testing activities.

Primary stage Analysis of UE side logs to determine Network issue /device issue using IMS logger and different modem analysis tool depends on chipset.

Worked on validating VoLTE and IMS test cases in the field.

Samsung, Bellevue, WA (Jan 2016 - Feb 2017)

Protocol Field Test Engineer

Responsible for Field Testing of LTE/UMTS devices, on field and vendors Network.

Functional experience includes Protocol Testing in Live Radio conditions (LTE/UMTS) IOT and Drive/Field Testing, developing Test plan & Test cases on testing Strategy document & Specifications.

Knowledge of testing tools like QXDM, QCAT, QPST and Configuration Management tools like Samsung PLM and Clear Quest.

Performed Regression Test includes SMS, MMS, CS, PS, TPut and VoLTE features.

Testing of LTE Inter/Intra frequency Handover & Reselection.

Overcome issues such as CS/PS drop call, Access failure, IRAT and IFHO failure and Low Throughput issues

Experience with CP Crash, Kernel Panic Upload Mode, and Power Reset & Modem Crash issue.

Basic understanding of Physical/MAC/RRC layers and Call Processing concepts in VOIP, LTE/VoLTE.

Support to the IOT team to capture logs for analysis of issues in live radio network by checking both the messages exchanged with the network and internal layers primitives at protocol level.

Support to the Metrico Test Lab team for issue reproduction and provide proper logs to R&D team to resolve very critical issues.

Responsible for the analysis/troubleshooting of large scale enterprise VoIP networks

Performed Data Throughput test for Ping, UDP, FTP and HTTP for Upload and Download both using Metrico Mobile datum and PC datum, capture logs for TP issues and perform primary analysis using QCAT.

Hands on experience on Performance and Benchmarking of IMS/LTE/UMTS devices. Experience with Different User Equipment like Smart Phones, Tablets & Notes.

Providing full R&D support and maintenance for pre and post launch products, including reproduction and diagnosis of problems.

Maintaining the bug tracking and reporting system, including the regular review of outstanding problems.

EDUCATION QUALIFICATIONS

Master of Science in Computer Engineering

University of Houston Clear-Lake, Houston, TX.

Bachelor of Technology in Electronics and Communication Engineering

JNTU, Hyderabad, INDIA

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