SUMMARY:

• 6 years of experience in IT, Testing, Manufacturing, Telecommunication and Technical Support.
• Experience working in the cellular industry in a field/operations position.
• Working knowledge of the 3GPP IMS architecture. Have a thorough knowledge on the Optical Transport Network architecture and MPLS platforms.
• Proficient in VoIP infrastructure and protocols - SIP, MGCP, SCCP and SRTP.
• Strong understanding of both analog (traditional dial) and IP (VOIP) dial solutions.
• Analyzed and fixed issues in Android Video Telephony and VOIP/RCS issues.
• Experience in network administration, network domain controllers, Cisco routers, switches, firewalls, Cisco Works, network monitoring technology, network encryption technology, and switch network technology.
• Thorough knowledge of network and communications architecture, hardware and protocols including, but not limited to, routers, switches, VPN, Wireless, SAN an NAS.
• In-depth knowledge of Cisco ASA and Juniper Netscreen Firewall security, spanning-tree.
• Thorough understanding of WLAN technologies including knowledge of wireless technology 802.11 b/g/n/ac.
• Possess good understanding of Events and Handovers such as X2 handover, S1 Handover, LTE to 3G Handover, LTE to 3G cell Reselection etc.
• Knowledge of Circuit-Switched call from LTE to UMTS/GSM/1X using CSFB (Circuit Switched Fall Back)
• Analyzed and fixed issues in Android Video Telephony and VOIP/RCS issues.
• Good understanding of LTE Architecture (eNodeB, MME, S-GW, PDN-GW) Network Elements and Interfaces and BTS architecture.
• Understanding of LTE Protocol stacks MAC, RLC, PDCP, analysis of layer 3 messages mainly RRC layer.
• Worked on SRLTE and SVLTE capable devices and test both functionalities in a controlled lab environment.
• Advanced knowledge of designing, implementation and troubleshooting L3 routing protocols including RIP (Routing Information Protocol), EIGRP (Enhanced Interior Gateway Routing Protocol), OSPF, IGRP, MP-BGP, LDP, BGP v4, MPLS.
• Competent understanding of network concepts, IPv4/6, TCP/IP stack and common Internet protocols such as HTTP, HTTPs, SSH, DNS, FTP etc.
• Proficient in advanced software applications including MS Office, MATLAB and Microsoft Visual Studio.
• Strong object oriented programming and scripting skills in C, C++, LUNIX and UNIX. Extensive practical scripting and/or development experience in shell, Per, Python, TCL.
• Proficient in developing web page quickly and effectively using HTML 5, CSS3, JavaScript and J-QUERY.
• Involvement in using various IDE's, Dreamweaver, Notepad++, eclipse, Adobe Photoshop.
• Expertise in creating Test Plan, Test Cases and Scripts based on Business requirements, Functional Specifications and Technical/Solution design documents.
• Experienced with system performance drive tests including cell site shakedown/ verification, soft/softer handoffs, cluster or market benchmark drive tests.
• Good understanding QOS services. Good experiences in F5 load balancer.
• Study and analyze current modem chipset architecture and participate in future recommendation for upcoming chipsets

TECHNICAL SKILLS:

Technical Tools: QXDM, QCAT, QPST, QMICM, QMI Test Pro, Wireshark, LAB view, Empirix Call Analyzer, Oscilloscope, Power Supply, and Spectrum Analyzer, JDSU (Agilent), Iris View Commscope BTS equipment, AutoCAD, Putty.

Web Technologies: HTML, HTML 5, CSS, BLUE-JS, BLUE-UI, CSS3, JavaScript, Require-js, Node-js, JQuery,AJAX, XHTML, XML, JSON, MVC Design, svn

IDE & Editors: Notepad++, Visual Studio 2010, Eclipse, NetBeans, Dreamweaver. Application Server Apache, IIS.z.

Database& servers: SQL Server 2005, MySQL, GIT, oracle, TFS.

PROFESSIONAL EXPERIENCE:

Confidential,

Test engineer

Responsibilities:

• Analyzing call processing/protocol issues, certification issues during RF/protocol testing, integrating SW fixes.
• Use Iris/IMS view and debug SIP call flows. Analyze VoLTE SIP drops and lost call through IRIS view.
• Analyses of SIP flow using Wireshark. Analyze and verify IPv4 and IPv6 dual stack using Wireshark. Troubleshoot network performance issues via Wireshark.
• Capture the SIP, UDP and RTP using the Wireshark network Analyzer, Empirix-Hammer and Broadsoft logs.
• Executed Error scenarios such as IMS Registration failure, Invite failure and missing headers.
• Perform traces and simulate scenarios through the Switches, Base Stations, Wireless Towers, and Authentication Servers (AAA, HLR, and HSS). Work closely with the New Features Group to assist in the deployment of new features and devices.
• Perform Volte analysis on RTP audio gaps, sip call drops, sip failures, QCI 1 dedicated bearer drops, Volte bearer setup failure analysis by using Wireshark and IRIS view packet traces. Created and performed 4G LTE acceptance test plan (ATP) validation for TCP/IP/UDP/RTCP/RTP/SIP/ETHERNET protocols.
• Follow test plan, execute the test cases, detect defects, create defect tracking, re produce the defects.
• Perform VoLTE/ IMS, SRVCC, Voice over Wi-Fi (VoWiFi) tests.
• Device IOT testing on LTE network and CDMA, Embedded product testing.
• Working on testing and implementation of E-911 and LBS features on the handset and on the network.
• Live E911 PSAP and VoLTE tests involving SRVCC, call performance and voice quality check, AGPS coordinates and eCID for Small Cells including verification of CS fallback and analysis of SIP messages.
• Utilized switch statistical data to examine relevant traffic and network performance related issues.
• Verified the Idle mode cell reselection drive test Inter MME Intra MME scenarios executed on 3G UMTS to Legacy network (LTE, 1x CDMA) vice versa. Support ALU, ERICSSON eNB configuration.
• Monitoring, executing post migration regression tests assuring network meets agreed KPIs and properly charges the subscribers internally in the ASR5000 charging system and other NEs through standardized interfaces (DIAMETER: Gx/PCRF, Gy/Online Charging System; GTPP: Ga/Offline charging system; RADIUS)
• Successfully tested WiFi arrays which utilized 802.11a/b/g/n/ac.
• Experience working with Apache and VMs / JBOSS/Red Hat/ Experience with IP Multimedia Subsystem platform.
• Testing Android Video / audio Telephony features and debug the failures by Analyzing Adb Logs
• Testing and troubleshooting network connectivity issues applying the OSI model.
• Hands on experience working on IP Gateways and PSTN interface.
• Worked closely with H.323, SIP, and MGCP in medium to complex customer networks.
• Responsible for maintaining and troubleshooting Avaya VoIP technology across Corporate WAN/LAN with a Cisco backbone connected via MPLS network.
• Ensure proper standards are met throughout all verticals including RF standards, installation standards, QA standards and best practices.
• Installation and implementation of WAN circuit hardware, routers, firewalls, load balancers, IP Gateways, Layer 2/Layer 3 LAN switches, wireless controllers, and controlled or standalone access points.
• Provide support for IP management on F5 Networks equipment. Performed Quality of Service testing using cisco Access Point.
• Involved in troubleshooting of DNS, DHCP and other IP conflict problems.
• Performed Voice and Data quality tests using Spirent Nomad, Datum, and QPST QXDM software .
• Tested WiFi calls in an AP exclusively to create different WiFi AP loading conditions using IXIA management Veriwave tool with a variety of traffic types, and evaluate the performance KPIs of WiFi voice/video calls.
• Loaded the WiFi network to different channel utilization levels to measure throughput/latency Confidential each level to perform 1 to 10 simultaneous WiFi voice calls Confidential each level, with the device with and without QoS support.
• Measure the MOS score for downlink and uplink using the Spirent Nomad tool and also measured the packet loss/jitter for downlink and uplink voice RTPs using IMS device logs.
• Preparing reports for voice quality testing which compare KPIs like call drops and call duration.
• Provide consulting and implementation management for VoWiFi solution based on IMS architecture and unique implementation solution.
• Worked on LTE iWLAN feature with ePDG server for seamless mobility between 3GPP network and non-3GPP network.
• Validated some PDNs can receive and transmit data on WLAN + ePDG while others can do so on LTE simultaneously with the availability of both WLAN and LTE.
• Working closely with SMEs on VoLTE for Business/One Talk project. Involved in End to End VoLTE for business device and MEP testing and also involved in FOA V4B testing.
• Involved in developing automated script for back-end testing using Selenium WebDriver.
• Participated QA weekly meetings and various other meetings and discussed Enhancement and Modification Request issues and defects in the application.
• Utilize and troubleshoot OpenStack Components: Nova, Cinder, Swift, Neutron, Glance,

Confidential - Austin, TX

Modem Test Engineer

• Responsible for manual and automated testing and verifying network protocol requirement for different embedded modems supporting LTE/TDSCDMA/GPRS.
• Responsible for all the product stability test efforts to bring up Confidential chip MSM8610, MSM8974,MDM9635, MDM9x45, MSM8994, MSM8992, MSM8952, MSM8909.
• Collecting and analyzing logs for various devices to check the functionality and network connectivity using Throughput Testing, Regression Testing, KPI Testing, and Sanity Testing.
• Responsible for testing Confidential 's IMS solution for services such as Voice over LTE (VoLTE) and Video Telephony (VT).
• Development and verification of radios and power management device drivers for Confidential 's commercialized RF Integrated Circuit (RFIC) and Power Management Integrated Circuit (PMIC). Responsibilities include SRD/SDD/ICD, software interface development for radio frequency device driver, baseband modem physical layer software, and firmware.
• Execute lab conformance test plans in the Confidential lab environment using various tools and test equipment. Test and verify network protocol requirements for complex digital modem products supporting VoWifi, VoLTE, LTE, UMTS (HSPA+) and C2K technologies.
• Testing device (stationary/mobile) functionality during different kinds of handovers and analyzing the messages exchange between UE and network on particular Software Builds.
• Evaluated wireless devices through OTA, LAB, Field and Application testing for GSM, WCDMA and LTE provisioned handsets.
• Tested SMS, MMS, HTTP Browsing, Media RTSP Streaming, Bluetooth, WiFi, GPS, and Telephony on BREW, Android, and other device platforms.
• Good understanding of Android logs & Application Testing using Linux Android Perl and shell commands, collect required logs and report it to debugging team for further Analysis.
• Perform initial Analysis of the CRASH Dumps using Crash Scope. Analysis of Android Logs to determine the test action causing the issue.
• Development and execution of test plans for modem product lines and system level features.
• Provided backend APIs to enable application programmers to access low-level hardware functions by using .vxd Win98 and .sys Windows2000/XP WDM (Windows driver mode). The lower level device drivers where accessed through ActiveX OCX model to expose methods, events, and data. Assist Software Engineers in developing PCI memory read/write functions to modem scratch-pad and devices.
• Perform Field testing using QXDM with reference devices and customer devices for IRAT scenarios. Field testing includes latest software build testing, collecting logs, finding system crashes for lab debugging. Performing FTP/UDP throughput test cases for single/dual carrier, single/dual SIM.
• Perform Confidential &T 10776 Acceptance testing in emulated lab environment, support validation team to meet Confidential &T technical requirement and Test Plan.
• IRAT testing of the chipset using Rohde & Schwarz CMW500. IRAT scenario as a replica of mobility, in and out coverage and cell edge.
• Experience with writing post-processing scripts using Python to extract Key performance Indicators (KPIs) and debug degradation in performance.
• Using Perl/Python scripts to flash modem build images on multiple devices with upcoming modems for IOS and Android devices.
• Experienced in automating given test cases into test scripts using TCL.
• Triaging issues seen in internal testing by using Trace T32 (JTAG) and helping developers for further debugging. Reporting Modem, Apps, Power, WCNSS, Boot Crashes from the devices on particular Software build.
• Worked with various teams to stabilize the 8x10 chip set. Helping them in reproduce issues with the Engineering Builds. Following up with developers on JIRA tickets and also collecting required logs for further analysis.
• Develop and debug different problems with the beacons association/dis association roaming and power management of the 802.11 protocol.
• Calibrating/Bench Validation of RF paths involving signaling and non-signaling tests on QCT based BB products for RATs including GSM, WCDMA and LTE using Confidential calibration tools QSPR, QRCT, R&S CMU 200/CMW 500 Call boxes. Worked with LTE modem test team for feature breakout between LTE modem test team and WLAN test team.

Confidential - Berkeley, CA

Lead RF Field Engineer

Responsibilities:

• Lead a drive-test team in the field to collect CW (continuous wave) path-loss data. Ensure that test kit is complete, with back-up equipment, so all test gear is working properly, calibrated and accurate.
• Perform walk testing, Benchmarking and drive testing for WCDMA, GSM, UMTS, CDMA 1x/EVDO, AWS, VoLTE, LTE network, site verification and troubleshooting.
• Manage team logistics such as air travel, van rental, hotels, and etc. while in the field. Worked on various workflows like Travel Request, Travel Expense, Mass leave approval and Time Correction.
• Understand and follow drive testing procedures as prescribed by Newfield.
• Work in concert with Newfield RF engineers and others Confidential headquarters to coordinate effective test plans, test schedules with clients.
• Worked with client cell technicians, RF engineers and real estate managers to obtain timely access to cell sites and to trouble-shoot issues quickly.
• Developed LabVIEW test programs to aid product in development, testing and analyzing product during the development cycle.
• Maintain accurate records of field activities in order to comply with contractual obligations.
• Running basics RF test cases on CMW 500 to ensure quality before sending out test units to operator’s and other test vendors.
• Knowledge of JDSU software for Collecting RF Mobile Network Data and Throughput.
• Experience with RF testing and optimization tools including: TEMs, Spectrum Analyzer, JDSU.
• Designing, network planning and optimizing 802.11 a/b/g/n wireless LANs using Wifi module.
• Development of Radio propagation model for MM Wave and 5G (28 GHz).
• Assist with configuring and troubleshooting issues on the CSR (Cell Site Router) for IP Backhaul connectivity between RAN equipment and Routers, which provided Bear Signaling and OAM Interaction.
• Duties include call NOC for alarms clearance, troubleshoot and install LMU and route cables according to True Position LMU & BTS integrated document guide.
• Site survey prior to Mount LMU, GPS and Dial-Link (BSXL) antennas plus configured and run functional testing ProComm Plus software.
• Design suggestions for the upcoming LTE/UMTS sites based upon the traffic pattern. Selection of appropriate eNodeB/ NodeB candidates for building and integration. Decommissioning request of under-utilized sites
• Tested antennas for radiation patterns in an anechoic chamber and gained experience with Electromagnetic and RF measurement equipment like Network Analyzers, Spectrum Analyzers, RF Faders, Splitters and Signal Generators.
• Analyze propagation modeling and “drive test” measurements and make recommendations for site optimizations.

Confidential - Bridgewater, NJ

Device Test Engineer

Responsibilities:

• Strong experience with GSM, UMTS, LTE,VOLTE and IMS wireless technologies and knowledge END to END call flows, PDP sessions, Attach procedures, Handovers, Detach procedures and PDP sessions.
• Good understanding of GSM, GPRS, UMTS, LTE and IMS architecture including the functionality of different network nodes like NodeB, eNodeB, SGSN, GGSN, MSC/VLR, MME, HLR/HSS, S-GW, P-GW.
• Performed System testing, Functionality testing, Black box testing, GUI testing, Back-end testing, Regression testing, Parametric testing, Protocol testing, IOT testing, AGPS/SUPL testing, Audio testing, KPI Testing for phones and tablets on GSM, UMTS, LTE and VoLTE technologies.
• Analyzed and reported KPI (Key Performance Index) results to RF and Field Teams to benefit the teams in identifying Hardware, Software or Configuration issues on the RAN Nodes.
• Strong experience in many tools including but not limited to NOMAD, Spirent, QXDM, NNEXT, TEMS, X-Cal, QPST, QCAT, IRTC, STT, ODIN, MTM terminal, RDX, DU Meter, Wire shark, DATUM android application and DATUM PC Client.
• Worked closely with the Product and Engineering teams to refine acceptance criteria, write detailed test plans, and build/maintain detailed test cases.
• Create command sequences for Long call, short call, and record into log file. Involved in Code reviews, Code Optimization and Performance improvement.
• Data throughput testing on phones and tablets for data types like HTTP, UDP, FTP, Web browsing and Ping in both stationary and mobility environments and comparison with the other phones for GSM/UMTS/LTE Technologies.
• Performing Data performance test in USB tethering mode, WI-FI Hotspot mode and On-Device mode using Datum android application and Datum PC client.
• Analyze and verify IPv4 and IPv6 dual stack using QXDM and Wireshark
• Testing of Confidential phones and tablet for different carriers like Confidential against the reference phones
• Daily interface with Field Operations/Engineers and Project Teams to install, commission, provision, execute Hardware & Drive Test ATP, as well as the commercial launch of RAN 4G LTE (2.5 GHz, 1900 &800 MHz), 3G (1900 & 800Mhz) and WiMAX nodes.
• Logging of the phones with different chipsets like Confidential, Confidential and with tools like QXDM/QPST, and NNEXT. Logging bugs with using DM tool such as QXDM. Monitor and support defects, troubleshoot and log issues.
• IRAT and SRVCC testing to verify handover procedures between different wireless technologies.
• AGPS testing and 911 testing to verify the GPS location provided by phones.
• Responsible to get QXDM logs, NNEXT logs, IRTC and STT Logs, or Silent logs for the issue debugging.
• Experienced to get the radio log for the device through ADB command.
• Used TCL scripts for manual and automation test cases.
• Work with our product development team to increase product functionality with PKI's, digital certificates, and new wireless 802.11 standards.
• Manually performed Mobile originating and mobile termination call testing in the field along with recording of the call failures on the phones and marking the locations on GPS Logger.

Confidential - Reston, VA

RF Engineer

Responsibilities:

• Perform drive testing using Anite Nemo Outdoor/Agilent/Tems/Actix providing benchmarking solution to Confidential.
• Test equipment for system optimization using TEMS and JDSU of wireless public safety ordinances file regulatory documents, issue operational work orders, update databases, and create project reports.
• Perform site verification and missing neighbor detection using drive test data
• Helped in post processing using wind catcher tool to determine the quality of data.
• Sector verifications. Soft Handover/Hard Handover, RNC -RNC handover Testing.
• Perform drive testing of Confidential &T cell sites and analyzed Sector Swap, dropped call, blocked call.
• Prepared KPI reports for Drop Call Percentage, Call Setup success Rate, Ec/Io, CS/PS origination failures, Handover success ratio.
• Pre and Post RNC Re-home testing and Report generation.
• RAN and EPC Core elements integration and performance testing.
• Parameter recommendation for achieving proper traffic distribution between UMTS Layer and GSM network.
• Responsible for contributing in the RF Design of the existing regional LTE network, Prepare FCC/FAA submissions in a timely manner.
• Perform radio engineering evaluation for system planning and site acquisition.
• Update all project trackers, and work closely with local RF Engineer and Regulatory Specialist to prepare necessary zoning/regulatory filings for sites ensuring that compliance is met.
• Utilize propagation tools and other RF related equipment for propagation, coverage review, zoning and regulatory.
• Monitors system performance indicators such as dropped calls, blocked calls, origination failures, handoff failures, review capacity reports and forecast for short and long term site/system requirements. New Builds: issuing search rings, running RF propagation, attending site walks, site selection, filing regulatory submissions (EME, TVW's, e911), review construction drawings, and creating RF designs(antenna selection, centerline, azimuths, down tilts). Site modifications: initiate RF design for Carrier add projects and site optimization projects. Work closely with counterparts in Real Estate, project management, system performance and RF design.
• Perform CSFB testing to verify LTE call success rate and call drop rate, speed test and E911.
• Analyzed various RF parameters such as RSRP, RSRQ, RSSI, SNR, and Average Power and made sure they fall under acceptable range.
• Troubleshoot VSWR issues within the base station lines and antenna system. Integrate and optimize BTS to new eNodeB's capacity additions into the existing network for outdoor Macros Cell Sites and indoor DAS Cell Sites. Coordinated with network operations, traffic, and RF engineering to perform cover and capacity demand improvements including antenna/carrier modifications and BTS additions.

Confidential, TX

Manufacturing Support Engineer

Responsibilities:

• Develops manufacturing processes by studying product requirements; researching, designing, modifying, and testing manufacturing methods and equipment; conferring with equipment vendors.
• Experienced in effectively trouble shooting, Pre-testing and Running Verifying dwelling, Engineering hold and cosmic hold units upgrading, building, repairing and installing PC/server hardware and software using methods' and special written instruction in accordance of HP quality policy. Able to log into machines using a point-to-point connection, telnet, remotely, and/or hyper terminal.
• Create Excel sheets for Issue Tracker, holding and floating, failing unit for Engineer, supervisor and Management containing product, prepare MQD form in shop floor.
• Trouble-shoot hardware, such as, motherboards, memory, network cards, CPU's, and cables. All hardware issues are logged into the manufacturing quality data base.
• Review engineering drawings and make necessary updates using AutoCAD, Pro/Engineer and Wind-chill.
• Participates with engineers in the debugging and troubleshooting of new and existing products.
• Automated repetitive tasks with Bash, PowerShell and C#.
• Improves manufacturing efficiency by analyzing and planning work flow, space requirements, and equipment layout.
• Running and setting up a semi-automatic machine responsible for the production of Thermal Inkjet Print heads.
• Identify and segregate product according to quality standards.
• BIOS updates are performed on all servers such asset tag, serial number using shop floor and MCS. Data entry into multiple computer systems.
• Take corrective actions per Standard Operating Procedures (SOP’s).