San Francisco Bay Area
Over 10 years of Modem System experience across technologies viz. 5G NR NSA / SA, LTE / LTE-A, and NB-IoT. Significant contributions towards all stages / cycles of Modem Commercialization – with a strong dedication and commitment to learn new technologies. CORE COMPETENCIES Simulation Tools: Protocol Conformance/ Certification Test System Simulators of Anite, Anritsu, Rohde & Schwarz, Datang and StarPoint Infra IOT: Ericsson, Nokia, Samsung Debugging Tools: QXDM, APEX, QCAT, QPST, QMI Test Pro, Wireshark, Sanjole WaveJudge, JTAG Programming : C, Perl, CGI, K-shell, HTML, Expect, Tcl/TK
5G Modem Application Engineer (Qualcomm, Santa Clara) Sep ‘19 – Present Driving / Supporting the areas of 5G NR PHY / Access Stratum layers in 5G NR NSA and SA technologies as part of 5G commercialization efforts with SDX55 and SDX60 modems. Roles / Responsibilities – • Leading the support in 5G NR mmWave Beam Management area. Supported in root-causing multiple UE / gNB Beam Management issues raised during Infra IOT, Carrier IOT, Performance testing and live NW deployment testing with complete technical ownership. • Driving the Enhancements and Optimizations to improve the performance in the areas of RACH, beam selection, beam refinement and codebook design. • Expertise in handling UE issues across different 5G protocol layers - ACQ, RACH, BLER, Data Stall • Expertise in 5G NR Protocol Stack, 5G NR NSA (EN-DC) and SA technologies, NR-NR DC (FR1+FR2) 5G Conformance Test Lead (Qualcomm, San Diego) Jun ‘17 – Sep ‘19 Led the 5G GCF / Conformance test team. Represented Qualcomm in 3GPP RAN5 discussions globally for 5G NR signaling. Roles / Responsibilities – • Being the Rapporteur of RRC, actively led the scoping efforts of RRC work plan for 5G NSA and SA technologies in RAN5 – responsible for driving / interfacing with global players • Driving test requirements gathering across RAN groups for 5G NSA and SA. Covering the following core specs - 3GPP TS 38.331, TS 36.331, TS 38.300 and TS 37.340 • Responsible for defining all RRC layer test cases in 3GPP Conformance test spec TS 38.523-1 – complete Standards ownership in 3GPP RAN5 • Drove the validation efforts of TS 38.523-1 5G test cases on SDX50 and SDX55 modems to maintain leadership in the PTCRB/GCF area.
Responsible for and leading the bring-up of CMCC NS-IOT Certification Test Suites from Protocol side. Experienced in performing GCF/ PTCRB Protocol Conformance test methodologies specified in 3GPP TS 36.523-1 to find software deficiencies in Qualcomm Modem System software. Well-versed in analyzing, debugging and root-causing the control plane protocol stack issues across different Layers of UE stack and suggest required changes to fix those issues. Key Accomplishments: • Technical ownership of the CMCC Certification process (Conformance and NS-IOT test suites) from protocol side across multiple modem chipsets • Commended for driving the collaboration efforts with multiple Test Equipment vendors for successfully bringing-up CMCC NS-IOT Certification test suite involving TDD-LTE, TDD-LTE<=> IRAT (TDSCDMA/ GSM) in a short time • Commended for collaborating with customer companies to successfully bring-up new features such as Rel-10 LTE-Advanced Minimization of Drive Tests, ZUC, eICIC, MFBI, FDD-LTE<=> IRAT (GERAN/ UTRAN/ CDMA1x/ HRPD) and IMS • Applauded for finding critical deviations in the behavior of Qualcomm UE from requirements of 3GPP and 3GPP2 specifications during conformance and new feature testing • Found key issues in 3GPP Test Specification documents and suggested corrections in the core specifications • Gained significant knowledge on 3GPP Specifications, LTE and LTE<=>IRAT signaling, protocol stack and different Layers of LTE Tools used: • Gained a significant hands-on experience on QXDM, APEX, QCAT, QPST, Sanjole WaveJudge, Protocol Conformance Test System Simulators of Anite, Anritsu, Rohde & Schwarz, Datang and StarPoint, Wireshark, JTAG
Perform GCF/ PTCRB Protocol Conformance test methodologies specified in 3GPP specification 36.523-1 using Qualcomm UE to find software deficiencies in Modem System software. Responsible for analyzing, debugging and root-causing the control plane/ signaling issues across all Layers of UE stack and suggest required changes to fix those issues. Obtained significant debugging skills to analyze and debug UE control plane protocol stack issues. Gained knowledge in installing software and incremental updates to different Qualcomm chipsets. Key Accomplishments: • Commended for collaborating with customer companies to successfully bring-up new features such as Rel-10 LTE-Advanced Minimization of Drive Tests, LTE-A ZUC, FDD-LTE<=> IRAT (GERAN/ UTRAN/ CDMA1x/ HRPD) and IMS • Commended for driving the collaboration efforts with multiple Test Equipment vendors for successfully bringing-up CMCC Certification test suite involving TDD-LTE, TDD-LTE<=> IRAT (TDSCDMA/ GSM) in a short time • Involved in the complete chipset certification test cycle – like bring-up, regression and chipset certification IOT of latest Qualcomm Snapdragon 800 chipset • Applauded for finding critical deviations in the behavior of Qualcomm UE from requirements of 3GPP and 3GPP2 specifications during conformance and new feature testing • Found key issues in 3GPP and 3GPP2 Test Specification documents and suggested corrections in the core specifications • Initiated and moderating ‘LTE Short Talk’ program within GCF Team • Gained significant knowledge on 3GPP Specifications, LTE and LTE<=>IRAT signaling, protocol stack and different Layers of LTE Tools used: • Gained a significant hands-on experience on QXDM, APEX, QCAT, QPST, Sanjole WaveJudge, Protocol Conformance Test System Simulators of Anite, Anritsu and Rohde & Schwarz, Wireshark, JTAG
Performed unit testing and software code integration of IQStream product – An adaptive content optimization technology for the real-time RAN or 3G networks. Gained significant knowledge on data comparing at different network elements of 3G system. Key Accomplishments: • Developed complete test plan and scripts to simulate real live network scenarios to test the IQStream optimization solution software
Spearheaded development of performance test tools and testing of LTE network elements, specifically end to end call processing. The test strategies involved basic attach and detach, handover, tracking area update and service request carried over using Qualcomm, Aeroflex and GC Thor data cards (dongles). Obtained experience in analyzing eNodeB performance measurement (PM) parameters. Gained significant knowledge in installing eNodeB software as well as incremental updates and configuration using LTEMgr. Key Accomplishments: • Applauded for identifying deviations in the behavior of key network elements such as eNB, MME and Qualcomm dongle from requirements of 3GPP standards during IOT, sanity and regression testing • Acquired significant knowledge to take the technical ownership of a proactive automated alarm framework • Found and root-caused issues with key legacy eNodeB performance measurement (PM) parameters • Gained significant knowledge on LTE call processing and RF interface, 3GPP LTE specifications, LTE protocol stack, LTE PHY layer and OFDMA Tools used: Gained a significant hands-on experience on Wireshark, Iperf, Digital attenuator tools, QXDM, QCAT, QPST, MXA signal analyzer