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Engineer Resume

San Diego, CA

SUMMARY

  • Wireless Communication Professional with 6+ years of experience in the field of Telecommunication. Performance, Testing, Implementation, and Operation of LTE and WCDMA Wireless Communications Networks using several technologies, including UTMS, LTE, IMS and VoLTE.
  • Proficient in using NOMAD for Audio Quality (MOS testing).
  • Knowledge on analyzing the logs using tools like QCAT, APEX.
  • Hands on experience 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.
  • Extensively performed the VoLTE field testing for the Confidential 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 Confidential QA Team during product release.
  • Experience with SRIB India and Confidential HQ to manage and resolve open defects for different Modem chipsets within critical time frame.

TECHNICAL 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

PROFESSIONAL EXPERIENCE

Confidential, San Diego, CA

Engineer

Responsibilities:

  • Responsible for validating Modem Software on Confidential VoLTE and LTE Chipsets.
  • Worked on GCF, PTCRB or carrier certification requirements for Wireless Carriers.
  • 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 basic understanding on core interface like S1, S6a, S11, Gx, Gy, Gz, S5, S6b, SGi, S1-U, NAS, Rx, S1-AP, X2-AP.
  • 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.

Confidential, San Diego, CA

Field Engineer

Responsibilities:

  • Sound knowledge in advising and performing the test plans on Confidential 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.
  • Co-ordinate with both off-shore and on-shore teams in regards to projects and issues.
  • Performed IOT testing on various Confidential chipsets at the Vendor’s site (Labs).
  • Have strong debugging skills on UE.
  • Proficient in using Android and IOS devices.
  • 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.

Confidential, Bellevue, WA

VoLTE Test Engineer

Responsibilities:

  • 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.

Confidential, Bellevue, WA

Protocol Field Test Engineer

Responsibilities:

  • 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 Confidential 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.

Confidential

Graduate Engineer

Responsibilities:

  • Performs operation, preventive and corrective maintenance and troubleshooting of all BTS equipment. Perform UMTS Data collection for 3G implementation of Idea & Airtel.
  • Monitoring successful handoffs, call drop, monitor data, voice calls.
  • Carry out Single Site Verification (SSV) for single cell testing and IFHO drives to verify inter-frequency handovers.
  • Monitor successful change of the network from 2G to 3G and vice versa and IRAT/IFHO issues.
  • Overcome issues such as CS/PS drop call, Access failure, IRAT and IFHO failure and Low Throughput issues.
  • Testing of signals and provide the signal information to Network Management System(NMS)
  • The signal information from the BTS is then evaluated at the NMS.

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