Objective

• A goal - oriented, hard-working and creative technologist aspiring to gain more learning, enhance skills & deliver efficiency to walk the success path together.

SUMMARY

• Master’s degree & 5+ years of professional experience in Wireless/Tele communications
• Solid understating of call flows for LTE Initial attach, IMS registration, VoLTE, VTLTE, VoWiFi, VoLTE conference, E911oIMS, SRVCC, CSFB, re-selection, handovers, IRAT, UL/DL throughput, carrier aggregation etc.
• Solid understanding of LTE’s EPS N/W architecture, air Interface & call processing concepts such as initial system acquisition, UL/DL sync, MIB/SIBs, cell selection/reselection, RACH process, attach process, measurement config, handover events, RLF, idle/connected mode procedures, default/dedicated bearers, QOS etc.
• Good understanding of multiple access schemes (OFDMA/SCFDMA), multiple antenna techniques (MIMO), modulation techniques (QPSK, 16/64 QAM), DCI/UCI formats, DL/UL channels, physical resource block, user/control plane, CQI, PMI, RI, RSRP, RSRQ, RSSI etc.
• Good understanding of VoLTE RAN features such as SPS, TTI-B, RoHC & C-DRX; POLQA measurements (MOS), jitter, E2E delay, SIP, SDP, RTP, RTCP, IP, TCP, UDP etc.
• Good understanding of LTE’s PHY, MAC, RLC, PDCP, RRC & NAS layer’s functions.
• Hands-on experience with R&S CMW 500, Spirent, W2Bi QP, Agilent 8960 etc.
• Familiar with 3GPP & 3GPP2 technologies/standards such as LTE, UMTS/WCDMA, 1X etc.

PROFESSIONAL EXPERIENCE

Modem System Test Engineer

Confidential

Responsibilities:

• As a member of QCT's modem test group responsible for verifying modem software's protocols/features, characterizing system performance, stability testing, system level feature testing, executing test strategies/plans, analyzing logs, troubleshooting issues, reproducing issues and working closely with developers.
• Conformance testing for VZW’s VoLTE E911, SFN testing, LTE data retry, LTE data throughput, LTE IMS registration & Retry etc. using R&S CMW 500, Spirent, W2Bi etc.
• Extensive use of Tools such as QXDM, QPST, QCAT, APEX, QMITP, Wireshark etc.
• IOTs with Carriers & Infra vendors such as Confidential & Confidential, VZW, TMO, E///, ALU, NSN etc. Confidential their labs and tested scenarios such as LTE attach, IMS registration, VoLTE, VoLTE conference, VTLTE, VoLTE to VT upgrade/downgrade, inter & intra frequency PSHOs, SRVCC, E911oIMS, CSFB, UL/DL throughput etc.
• Performed POLQA measurements (MOS) under different channel conditions.
• Tested Confidential & Confidential ’s ADAPT 10776 tests on Captive NW, VZW’s IOT test suites and TMUS IOT test suites Confidential operator’s labs for certification and carrier acceptance.
• Tested, flashed & calibrated various chipsets/modems (8960, 8974, 8992, 8994, 8996, 9x15, 9x25, 9x35, 9x45) on different platforms (Android & Windows) & on different PLs.
• Supported development of test plans and procedures from operator’s requirements, standards and feature documents.
• Raise CRs/JIRAs for issues, help developer team in isolating the issue and finding the root cause & then verifying the fix to make the device bug free.
• Possess excellent inter-personal skills and have interfaced with network/Infra vendors, operators and OEMs across U.S.A.

Device Test Engineer

Confidential

Responsibilities:

• Performing basic protocol sanity, regression & stability testing for new AP, CP & LTE builds; IOT/lab/field testing of various mobile devices.
• Extensive use of tools such as NNEXT, RDX, Odin, QXDM, QPST, QMITP, QCAT etc.
• Responsible for loading the new Binaries in to the devices (Flashing), update RF calibration data, and execution of stationary and field test cases, providing the AP, CP, and SYS Dump Logs for various devices.
• Responsible for testing features like mobile origination/ termination, long calls, basic sanity, regression, throughput, CSFB, stationary and mobility testing etc.
• Responsible for performing IRAT handover testing, cell selection & reselection tests, mobility, PS, CS, SMS & supplementary services, KPI testing, datum for throughput.
• Responsible for keeping track of issues raised by field testing team, monitoring the status of the issue, and close the issue after it is resolved, tracking the test reports, and provide support to the development team in reproducing and reporting issues.
• Responsible for going through the analysis of the issues which has been raised by the field testing team and to provide support to the field test engineers.

Associate RF Engineer

Confidential

Responsibilities:

• Performed RF drive testing using TEMS Investigation to carry out signal strength measurement and coverage analysis of the network; performing site pre check, SSD (Site shakedown) & SSV (single site verification) in all sectors & different clusters.
• Collected UE measurements for all cells and scanner data using TEMS and coordinate with RF Engineers to optimize network, reduce drop calls and reduce interference levels.
• Performed sector testing to identify sector swaps, handoffs and reported it to RF engineers; conducted IRAT testing on UMTS boundaries to check handoffs between UMTS and LTE & used Microsoft streets & trips for route determination & navigation.
• Responsible for exporting the drive test data and arranging it in Microsoft excel & creating reports for the client by plotting the data using MAPINFO Professional.
• Responsible for assisting senior RF engineers in improving performance of the network and varying the parameters such as electrical and mechanical tilts, adding neighbors for successful handoffs and to reduce dropped calls due to coverage holes.
• Responsible for monitoring the 3G data service, handoffs between LTE & UMTS upload/download activities, pinging, and making multiple long and short calls.
• Responsible for troubleshooting the drive test equipment upon failure, setup communications ports, coordinate drive routes and update maps etc.