Modem & field test engineer Resume San Ramon, CA - Hire IT People (2024)

SUMMARY

• Around 4+ years experience with testing and evaluating mobile devices Manually.
• Knowledge of LTE Network Architecture, LTE Air Interface, LTE Handover Procedures, LTE Reselection procedures, LTE 3GPP IRAT, CSFB Procedures, Carrier Aggregation and LTE FDD procedures.
• Good knowledge in LTE: Power on Sequence, RACH Procedure, Attach Procedure, OFDM & MIMO.
• Experienced in carrying out ATT Carrier Acceptance, Conformance and Data Throughput testing.
• Good understanding of differentRadio Access Technologies(RAT)andrespectivearchitecture.
• Good understanding ofNR,LTE and SIP call flows.
• Conversant with different 3GPP TS,RFC,and IR 92.
• Possess good Understanding of LTE - Frequency Scan, Initial Acquisition, SIB, MIB Procedures, Random Access Procedure (RACH), RRC Procedures, Idle & Connected Mode Measurements, Setup and tear down of SRB’s & DRB’s, Default and Dedicated Bearers set up, Handover, LTE to WCDMA, IRAT, CSFB Procedure, SRVCC etc.
• Knowledge of simulator R&S, willing to learn with team, Desire to work in lab environment.
• Knowledge of python programming.
• Hand-on experience in link master LML,LMA.
• Well versed in defect logging & test case development.

PROFESSIONAL EXPERIENCE

Modem & field test engineer

Confidential, San Ramon, CA

Responsibilities:

• FOTA, checking normal behaviour following user initiated update to latest firmware.
• Performing different test case manually VoLTE E911 AGPS capable device, WPS call(VoLTE), Firstnet services calls,Hidden caller ID,performing DDS activation .
• Writing different test procedures, assigning test cases within team.
• Trouble shooting Volunteer issues & finding root cause manually, capturing logs using ADB & manually
• Reporting issues & Collaborating with different vendors Samsung, Sonim, LG, Motorola, Kyocera, Emblem,Q1W,Netgear.
• Different Sector testing NR (SA&NSA), logging using linkmaster LML.
• Hands on Experience on (E-Sim) and Emergency call (E911) testing on all Android devices.
• Verifying Modem software's protocols/features, performance, and stability metrics in different radio access technologies like LTE, 5G, and VoWifi.
• Design documents and specs and coming up with best strategies and test plans.
• Executing test strategies and test plans, log analysis, troubleshooting/analyzing problems, optimizing system performance and improving the stability of the product.
• Validation of Wireless network nodes/interfaces for LTE / UMTS / GSM like MME / RAN/BSC, SGW/SGSN, PGW/GGSN, eNb, GSM BTS, S1, X2, S5/S8, Gx, Gy, IMS, HSS/HLR and other network support nodes to provide end-to-end network diagnostics as per 3GPP technical specification.
• Working on Features like RTT (Real Time Texting), RCS Messaging, SIP Calling, Spam Call Detection .
• Modem and Telephony testing feature, which includes Video Telephony, EMBMS (VZW), Sim Lock Features, across different RAT's on Flagship devices.
• Analyzing and reporting Android Crashes that occur during automation testing, report bugs on scripts and test cases.
• Manage, execute, and analyze the failures via ADB and raise the bugs using Bug tracking tool.

QA Engineer

Confidential, Plano,TX

Responsibilities:

• Performed test, analysis, and evaluation of modem chipsets used in upcoming mobile devices, in operating environments to ascertain their efficacy for certification and accreditation.
• Performed testing on Verizon, Sprint, ATT & Confidential -Mobile devices with IMS-based services such as VoWi-Fi, ViWiFi, VoLTE, ViLTE, iWLAN, RTT, RCS, Spam Call Detection, and Messaging Services.
• Performed functional and regression testing of the modem chipsets in various RAT environments.
• Performed Data Throughput.
• Performed different kinds of lab and field tests such as CS/PS Attach/Detach sequence, protocol testing, KPI, and SRVCC tests to improve the call connectivity and voice quality. Also tested the modem for data throughput and crash (load/performance) tested the modems.
• Performed various Test Cases like, IMS Registration, VOLTE Call Interaction, VOLTE Multi-RAB, Video Calling, Wi-Fi Calling, SRVCC and IRAT in order to check functionality of pre-launched device.
• Experience in data acquisition and data analysis using Shannon DM, the data logging and analysis tool for Shannon chipsets. understanding of Call Processing, L2 (MAC, RLC, PDCP), L3 (RRC), Mobility Management and Physical Layer.
• Performed in house reproduction of field issues and debugged throughput test cases during bring up to achieve peak throughput in lab by coordinating with Systems and R&D.
• Performed field tests as required by the test cases to verify the performance and functionality of the modem with respect to different carrier standards ( Confidential & Confidential and Confidential -Mobile).
• Interacted with third party suppliers and other service organizations and participate in product / service releases.
• Performed firsthand analysis of issues and coordinated with developers to resolve issues.

RF Engineer

Confidential, Dallas, TX

Responsibilities:

• Performed Single Site Verification (SSV) and cluster drives to verify the SC, soft and hard Handovers, RSCP.
• Conduct detailed and daily Cluster Drive testing WCDMA, IRAT, IFHO, HSPA analysis, GSM, UMTS, LTE and E911.
• Performed Stationary & Mobility Tests for performance critical indicators such has Signal Strength (RSSI), Reference Signal Received Power (RSRP), Interference (SINR), Peak/Average throughput.
• Analyzed various parameters such as RX quality, RX level, TX power and also analyzed the RF conditions using TEMS.
• Responsible for field testing, optimization and noting down and calculating the reading for alpha, beta and gamma sectors.
• Collecting and analyzing field drive test data and post processing.
• Coordinate with RF engineer for sectors swaps.
• Performed RF Drive Testing using TEMS Investigation to carry out radio propagation,
• Signal strength measurement and coverage analysis of the network.