SUMMARY

• 6 years Extensive experience in performing Device & Network testing, interpretation and execution on GSM/ UMTS/CDMA/ GPRS/ EDGE/ HSDPA /HSUPA and LTE networks
• Expertise in LTE technology nodes MME, SGW, PGW, GGSN, PDSN, HSS and IP stacks for domestic and international markets in both 3GPP and 3GPP2 mobile communication standards.
• Experience in working on Radio Access Networks (RAN) and Core networks like NodeB, eNodeB, RNC, EPC,
• MME’s
• Strong background in Wireless Communication (GSM, TDMA, CDMA, EDGE, EVDO, UMTS, WCDMA, LTE) and Data Communication Protocols.
• Excellent knowledge of the following UE side protocols: RRC, NBAP, RANAP, RLC, MAC, TCP/IP
• Experience in analyzing LTE KPI’s like call setup failures, RSRP, RSRQ, Handover success, Handover
• Threshold, Average UL and DL throughputs, UE Tx power, etc.
• Strong knowledge and experience on packet testing for VOLTE call flow.
• Good knowledge on the nodes and functions of IMS/AS platforms.
• Basic knowledge of In - Building Radio Planning & LTE Radio Network also familiar with In-Building and LTE Design Optimization Process.
• Experience in shell scripting to modified the automated test case.
• Batch/Shell, PythonScripting, TCP/UDP protocols, Analyzing packet transfer data, WiFi knowledge, Design Test plans, Document test cases.

TECHNICAL SKILLS

Tools: QXDM, ACTIX, APEX, JDSU, NEMO, MAPINFO, MATLAB, OPNET

Programming Skills: C++, VHDL

Software Packages: MS Visual Studio 2012, MS Office 2013

Hardware: Agilent multi band RF scanner-GSM, CDMA, LTE, and UMTS, PCTEL scanner, Agilent Spectrum Analyzer

PROFESSIONAL EXPERIENCE

RF Engineer

Confidential, Irvine, CA

Responsibilities:

• LTE site functionality test (shakedown), Pre - Post launch cluster drives using DataPro
• Provide training to new team members related to LTE shakedown, cluster drive process and DataPro
• Crossed lines identify/ report, Low throughput due to PIM problems, Low throughput due to unbalanced TX path (problems with lines) and assist cell tech in troubleshooting.
• Data Processing (Windcatcher) and analysis: Create Cluster drive report, PCI plots
• Analyze various RF parameters including RSRP, UL and DL throughputs, handover failures, attach failures and session errors. KPI Monitoring of the worst offender sites
• Understanding of digital communications systems, RF propagation, CDMA, OFDM, telecommunications concepts
• Understanding of Physical/MAC layers and Call Processing concepts in one or more of the following air interface standards
• Worked on several special projects, including PTT testing, cubical testing, and ATP.
• Analyzed and assisted in resolution of network performance problems related to dropped calls and collection; performed post processing using MapInfo tools.
• Partnered with Optimization Team for network troubleshooting and trouble ticket resolution.
• Performed cell site audits and antenna adjustments.
• Demonstrated success in understanding EVDO Technology (served as only technician working on EVDO launch project), as well as performing RLP Throughput tests and FTP upload/downloads.
• Conducted audits to correct site problems; organized Drive Test team to optimize cleared clusters on system, which greatly enhanced system performance.
• Served as troubleshooter to analyze problems and correct equipment due to improper installation, factory defects or faulty telecom circuits, lines or antennas.
• Neighbor list addition for sites, add physical and logical sites to BSC and set Beacon and Border targets for ISSHO (inter system soft handoff), ISHHO (inter BSC hard handoff) drives.
• Analysis of inter system handover drives using Windcatcher Plus and prepare presentations for the customer
• Create drive routes, cluster boundaries etc. in MapInfo and Street Atlas for various drive teams.
• Coordinate with drive teams during cuts and assigning them drive routes and sites for shakedown

LTE Engineer

Confidential, Columbus OH

Responsibilities:

• Performed target field regression test on 4G LTE supported modem in networks such as ATT, TMO.
• Intense testing on VoLTE for voice call in LTE on Qualcomm UE for Trial quality
• Coordinating with systems engineering, project management and software development teams to meet inter-operability test goals and enable smooth integration of the LTE and VoLTE/IMS solution in infra-vendor and carrier labs.
• Interfacing with network operators and vendors for integration of LTE/VoLTE solution.
• Analysis of logs collected during Inter-Operability testing to ensure compliance of the solution with standard LTE and SIP specifications.
• Triaging and following up with Systems Engineering (on consistency with specifications and standards) and development team (on bugs identified during analysis of IOT logs)
• Consolidating and reporting results Confidential the end of test cycles.
• Scheduling and resource allocation for IOT test activities - working with Product Management teams and creating test schedule.
• Training and mentoring engineers on LTE and SIP log analysis.
• Performance measurement of Sprint Network Vision for CDMA/EVDO/LTE for Samsung Telecom America.
• Radio optimization, parameters consistency check, monitoring of KPI’s and maintenance of performance and quality of service.
• Employed optimization techniques (antenna selection for optimal performance, mechanical/electrical tilting, transmit power settings, antenna clearance, neighbor list analysis) for optimal site and cluster performance
• Analyzed drive test results for call drops/blocks, coverage issues, network traffic, throughput, sector swaps, congestion and interference.
• Responsible for tuning up network performance by setting up/change CDMA/EVDO/LTE system parameters Ec/Io, Ec, Active set windows, minimizing ping pong effects, antenna diversity configurations, improving Walsh code utilization by changing radio configuration, reducing PN conflicts by analyzing PN offset planning.
• Experienced in LTE site /cluster level optimization ( throughput testing, Intra/ Inter eNodeB handover testing, latency, call success testing, PCID and RACH verification, Interference control, Handover parameters optimization, checking TAC values).
• Performed coverage improvement using RET changes, Antenna diversity, call selection and reselection threshold. Interference control; thereby improving SINR, CQI and improving DL/UL throughputs.
• Handover optimization for S1, X2 handovers using generated events. eHRPD handover optimization.
• Enabling/adding missing X2 links for 4G LTE network
• Network level reports generation and analysis (No harm reports, Cluster acceptance reports ets). Soft Handoff/Hard handoff analysis, down link power, Traffic Statistics, Analysis with various SHO trigger events and threshold fine tuning for optimum Soft/Hard HO performance .Defining and maintaining the consistency of Neighbor relations, border carrier definitions

System Test Engineer

Confidential, Boston-MA

Responsibilities:

• Pre-Launch tuning of VOLTE and L13B.
• Coordination with SME's to assist end to end troubleshooting of LTE and VoLTE issues.
• Assisting in IMS core problem resolution and analyzing/isolating to elements such as P-CSCF, S-
• CSCF, MGCF, MFR, TAS, AS
• Assisting and troubleshooting VoLTE call failure scenarios, IMS Registration issues.
• Understanding and troubleshooting the call flow of VOLTE.
• Worked the features like SRVCC, iRAT testing
• Good understanding of SIP/IMS signaling.
• Performed various tests like VOLTE Regression, HI CAP, VOLTE MOS and VOLTE-E911.
• Trouble shooting the IMS-Registration issues.
• Reviewed SIP messages for 4G calls: 401, 409, 403, 200,100, 180,183, PRACK, Cancel, Notify, Subscribe, etc.
• Good understanding on RTP, SDP, RTCP
• Setting the APN’s and verifying the servers using both AWS and 700 bands.
• End to End testing and verification of new features on MME/IMS.
• Performing Volte END to END Signaling
• Performing Volte messaging.
• Performing S1/X2 HO between volte calls and also performing throughput background Confidential the same time
• Tracking the coverage containment implementation using the weekly KPI reports for the markets.
• Experiencewith Installing and administeringLinuxhosts for networking purposes.
• Experience in Shellscriptingusing sed, awk programming. FTPing files, split large files to process, archival process, running jobs in background, system load monitor etc

RF Optimization Engineer

Confidential, Phoenix, AZ

Responsibilities:

• Worked on Post optimization of 600 sites for Antenna Swap project Confidential &T Phoenix market.
• Assigning UMTS carriers to the GSM sites based on capacity and mobility parameters.
• Verify and ensures correct Tilts and Azimuths are implemented after Antenna Swap.
• Verify System return loss sweeps using Anritsu Master Tool.
• Analyzing Drive test data with ACTIX/TEMS and Reporting of RF and Network Problems like Pilot Pollution, Weak Coverage area, Drop Calls, Access Failures, Handovers Problems (Intra Frequency, IFHO, IRAT, and Low Throughput).
• Analyzing Drive test data with ACTIX/TEMS and Reporting of RF and Network Problems like Pilot Pollution, Weak Coverage area, Drop Calls, Access Failures, Handovers Problems (Intra Frequency, IFHO, IRAT, and Low Throughput).
• IRAT Optimization, reviewing new features recommended settings, monitoring implementation and optimizing the feature parameters and troubleshooting hardware problems causing KPIs degradations in network. Provide support to RF Drive team.
• Familiar with Random Access Channel (RACH) procedure.
• Hands on experience in Cluster Analysis using ACTIX and making reports and submitting it to Market Lead.
• Drop calls and Event Analysis for the Clusters and providing recommendations in the Analysis Reports.
• Experience in neighbor Optimization.