SUMMARY:

Experienced Systems Test Engineer worked on VoLTE, LTE, EVDO (Rev 0 & Rev A) and CDMA 1x wireless technologies. Quick learner focused on accuracy, timely execution, results oriented contributor with excellent communication skills. Seeking for an opportunity as a Systems Engineer, and to gain experience in feature/software development aspects of the system

SKILL:

Wireless Technologies, Standards: VoLTE / IMS call flows, Video over WIFISIP / RTP / DIAMETER protocols, 3GPP TS 24. .6.1 RFC 3261, RFC 3550, RFC 3665

LTE, EV: DO Rev A, eHRPD, CDMA - 2000

LTE eNodeB Tools: WIPS, NEM, LTE eNodeB (LR13.1 LA5 Software), Sherpa

LTE UE Tools: IRISVIEW, ACCUVER (XCAL-P, XCAL-M), Windcatcher, Netscout, Wireshark, QXDM, QPST

Automation Tools: Aida, Easy Test

LTE UEs: Confidential Cat3 (9600, 9615), Sequans Cat4, LG Cat3 UEs

Wireless Equipment: Spirent Channel Emulator and Call Box, Agilent Spectrum Analyzer

Operating Systems: LINUX, Sun Solaris, Windows XP, Windows 7

Programming Languages: Python, PERL, TCL, C, Verilog, MATLAB, Assembly

Documentation Tools: Bug Tracking Tools, Version Control Tools, Code WarrioVISA STATUS:U.S Citizenship

PROFESSIONAL EXPERIENCE:

IMS / SIP Protocol Stack Engineer

Confidential, Waltham, Massachusetts

Responsibilities:

• Functional call flow verification on Video over WIFI and Voice Over LTE combinational scenarios
• Functional call flow verification at LTE and IMS protocol level on the Verizon IMS pre-production network. Analyzing IRISVIEW network logs and ACCUVER Device logs for the end to end Voice/Video calls Over LTE (VoLTE) on LG and Samsung devices
• Knowledge of VoLTE network elements such as Presence Server, TAS, CSCF, SCG, MSC, HLR,
• Acquire Performance/KPI numbers for the packet loss, RTP, jitter etc., to measure video quality using ACCUVER logs

LTE RAN Systems Test Engineer

Confidential, New Providence, New Jersey

Responsibilities:

• Verification of the first time bring up and functionality of the Controller Module Hardware Board (CCM) in the 4G LTE Confidential eNodeB base station
• Ensuring that all the subsystems of the eNodeB such as Modem / baseband board, GPS unit, Clocks, Radio Receiver Heads are functional in the presence of the new CCM board
• Ensure the LTE first call is made successfully and maximum throughput is obtained
• Ensure KPI numbers such as boot up time associated with each of the subsystems on the eNodeB along with the new controller board are better than those of its predecessor
• Run overnight stability tests such as continuous attach / detach, handovers with and without traffic and debug crashes
• Working closely with hardware team to resolve board level issues
• Basic LTE call flow verification, RRC IDLE, RRC CONNECTED states, context registration
• LTE eNodeB Database creation for various configurations such as Dual band (band17, band4), Dual Carrier (5, 10, 15, 20) MHz support, MIMO vs Transmit Diversity
• Inter eNodeB, intra eNodeB handovers in idle state and active state for Lossless Handover and Seamless Handovers transmission techniques
• Verify that maximum throughput is achieved in both the uplink and downlink data transfers
• Establishment of QoS bearers for various applications like Video Telephony, VoIP (SIP / IMS); verify number of resource blocks, packets are allocated as expected
• Verification of PDSCH / PDCCH power levels for variable path-loss in the end to end call
• Link Adaptation Testing to ensure mobile performs well under various fading environments (EPA 5, EVA 120) Low/ Medium/ High correlation propagation profiles, using SPIRENT Channel Emulator. Uplink and Downlink throughput is measured and compared against the simulation results of the LTE channel Models
• Various logs collection and analysis including the Layer1 / Layer 2, modem logs, platform, radio receiver head logs, UE QXDM logs, Sherpa logs on eNodeB end to help debug

IOT Test Engineer

Confidential, Richardson, Texas

Responsibilities:

• Validating mobiles from various vendors against the CCF standards like CCF-57 thus ensure the product meets the global industry standards and is delivered to the carriers in the market

Technical Lead Engineer

Confidential, Redwood City, California

Responsibilities:

• Hands-On experience, Executing and Analyzing logs for LTE (basic call flow), CDMA, 1x EVDO, to validate SFN, IOT Conformance Tests (C.S0043, C.S0037, C.S0094), Carrier Specific Tests (Verizon, ATT) using Agilent, Anritsu, Spirent test equipment

Sr. Systems Test Engineer

Confidential, San Diego, California

Responsibilities:

• Worked with system design engineers in implementing RF transceiver of a BEACON CHARGER as per the FCC requirements. Tests include characterization of wideband vs narrowband signal with FSK/ GFSK modulation for various RF metrics such as Channel Power, Channel Power Density, Spectral Flatness, and Harmonic Peak Power using a Spectrum Analyzer, Signal Generators and Power Amplifiers
• Execute tests on BOOT / SECURE BOOT architecture of AMSS for boot-loaders, OEM certificates. Implemented hardware rework, such as blow fuses on the chipset to enable specific hardware configurations as per the hardware manuals
• Tested low level embedded modules such as USB, UART, touch screen, keypad, and headset functionality at the driver level. Worked with the software developers in debugging issues and executed test plans

Hardware Integration Engineer

Confidential, Austin, Texas

Responsibilities:

• Generated top level RTL net-list for very large scale designs such as cellular baseband / application processors, modems, accelerators targeted to implement advanced 3GPP Rel8(LTE), Rel7(HSPA+), Rel6 and advanced 2G standards. Also provided support for legacy 3G and 2G standard designs in 90nm and 65nm process technologies
• Developed TCL scripts to map the IPS, AXI, AHB bus connections between IP blocks.
• Worked with third party tool vendors like Cadence and Synopsys to report and resolve design and tool issues
• Performed static timing analysis for all process, voltage, temperature corners in scan and functional modes, reported and resolved timing violations, design rule checks for worst and best case scenarios
• Developed chip-level constraints and exceptions, redefined clocks at the low power clock gating, wrote TCL scripts to setup static timing analysis for multiple chip designs
• Modified the timing constraints for ARM and DSP, resulted in run-time gain by 50%
• Integrated vendor supplied Built In Self Test (BIST) memory insertions with wrappers for IP blocks for two tape-outs with no post-silicon issues. Verified the modified RTL by running integrity checks and logic equivalency checks
• Modified RTL according to the specifications for stand-alone verification of IP blocks

Systems Test Engineer

Confidential, San Diego, California

Responsibilities:

• Hands on testing experience with RF channel, base station simulators, GPS, Media FLO, JTAG, FPGA test equipment
• System testing of ASIC chips that form the core of cell phones
• Development of test plans and automation requirements for various features such as quality of service, cell reselection and handover
• Feature development for optimized data call set-up times and performance
• Optimization of hybrid-mode (EV-DO and 1x) performance for bad coverage areas
• Verification of the physical layer performance of the mobile in the Idle, Acquisition states
• Feature testing of EV-DO protocols (authentication & session management protocols), call processing and call flow signaling
• Worked on RLP signaling and data path verification for application layer protocols such as TCP/IP, UDP, and ICMP
• Worked on Broadcast & Multicast Technology pioneered by Confidential
• Measurement of battery-level current consumption of the mobile during idle and traffic states, analyzing 1x and EV-DO wake-up current profiles and estimating the stand-by time