STEPHEN  T.  NGUYEN

 

3724  Lowrey  Way 

Plano, Texas  75025 

(214) 886 – 5909

nguyens9@yahoo.com

U.S Citizen

 

 

OBJECTIVESeeking a challenging Systems/RF/SoftwareTest/QA/Field/Technical Support Engineer position in Communications and Network Systems to utilize knowledge gained from education with special interest in RF, Femtocell/Small Cell, LTE, Wireless – Nokia and Alcatel-Lucent, Ericsson (CDMA, GSM, UMTS, GPRS, HSDPA, UTRAN, and Cellular Handsets), IMS-PTT/PTS (Push-to-Talk/Show), LMR (Land Mobile Radio – P25), PBX, GPS, SoftSwitch, VoIP, OC3-192, IPTV, DSL/ADSL, SONET, Software and Hardware Development.

 

EDUCATIONTHE UNIVERSITY OF IOWA, Iowa City, Iowa.

B.S.E.E., Bachelor of Science in Electrical Engineering, 1991.

 

COMPUTER SKILLS

C, UNIX, Linux, SQL, ClearQuest, ClearCase, DOORS, Test Director, HP Quality Center, ADA Programming, Labview, Microsoft (Excel, Word, Power Point,…)

 

CCNA, BGP, MPLS

 

WORK EXPERIENCES

Alcatel- Lucent Inc., Plano, Texas.

01/96 – PresentSr. Systems Integration & Test Engineer.

CDMA, GSM, UMTS, 4G LTE, LMR, RF, IPTV, IMS, VoIP

 

GSM, UMTS, 4G LTE, RNC/UTRAN, CS/PS Engineer

·               Contribute and work closely with the sales team (Pre/Post-Sales), customers, NOC, TAC, and technical teams by providing architecture, promotion packages, system specification documentation for the E2E, Femtocell/Small Cell, LTE requirements and road map information related to products covered by the role.

·               Developed test beds, test plan, test procedures/scripts, test cases, regression test, CIQ, MOPs, GUI, UAT/ATP, Client/Server Web Application, API, SDLC, HP Quality Center, HP/Mercury Suite, QC/ALM, Test Director, Spirent Test Center  based on test requirements extracted from hardware and software functional specifications, and product required documents.

·               Automated and manual verification; analyzing test output, reporting bugs, verifying bug fixes, and review technical documentation based on Software Applications. 

·               Developed technical, training documentation, training materials, procedures, reports, and Computer Based Training (CBT) products.

·               Working knowledge of Database (SQL, Oracle, Sysbase), OS (Windows, Unix, Linux, Solaris, AIX).

·               Experienced in deployments with Layer 2, 3 technologies, RLC, RRC, DPCP, TCP/IP, IGMP, RTP, RTSP protocols.

·               Automated and manual testing; QXDM, QPST, Data KPI and tools, analyzing test output, reporting bugs, verifying bug fixes, and review technical documentation based on Software Applications. 

·               Experienced testing and troubleshooting products CDMA/1xRTT/EVDO, GSM, UMTS, HSDPA, GPRS, SGSN/GGSN (Gr, Gn, Gi, Ga Interface), UMA, WiFi, OSS, BSS/RAN, OMC/RAN, BTS/NodeB, IuCS, IuPS, Iur, Iub,…

·               Experienced in debugging, analyzing, capturing, and generated software problem reports when test case failures in Gn, Gi, Gr, Ga link, GPRS (SGSN/GGSN) network, IP phone, Handset SIP Phone.

·               Experienced and understand in UMTS wireless infrastructure protocols in IP core, data, IP QoS, and L2/L3 IP network architecture.

·               Strong knowledge in IP based networks, Cisco 7609 (MAR/OAR), Cisco 12410 (IAR), Cisco 4948/6509 (OAS), BGP Internet Service, OSPF, MPLS,…

·               Create/Prepare/Update work orders/Trouble tickets/Status (Remedy, PVCS, DDTS, ClearQuest, ClearCase…) report for every issues related to systems or components, address customer request/issue include installation/configuration, software/hardware upgrade throughout demo/trails/migration to customer labs and production.

RF Engineer

·               Coordinate/schedule/track engineering tasks, negotiate/establish specifications for changes/additions; keep customer informed of progress/changes to schedule; lab setup, and provide technical support to customers at installation of new features. 

·               Performed analysis of measured data, in order to modify network design and enhance performance. Ensure the deployment of an optimum system, the service provider in line with the objective and the strategy adopts service coverage. (eg; E911 configuration management, LMR P25, Public Safety Answering Point – Support PSAP for new deployment phase, validation and testing radio system)

·               Developed test beds, test plans, test site scheduling, site survey, equipment calibration and setup, RF signal measurement and data analysis (e.g:  Antenna/Tower, Tx/Rx, Repeaters, RF Coverage, RFI (Radio Frequency Interference), HF (3-30MHz), VHF (30MHz-300MHz), UHF (300MHz-3GHz).

·               Performed microwave interference analysis as prior to actual RF transmission from a base station of a wireless network, remove or relocate microwave links to avoid any interference caused by the wireless system.

·               Experienced with Nera; Microwave radio relay systems, telecommunications management networks, and mobile satellite communications systems (VSAT)

·               Defined the requirements and establish the design criteria to identify the network planning tools to use and the required databases.

·               Identified base station sites for system coverage provision, and perform site surveys with other network implementation teams, in order to verify suitability of the sites for zoning acquisition and construction.

·               Implement high performance operational wireless networks which include initial RF network design, re-design, regular design reviews, RF build verification, system RF acceptance, IRAT (Inter Radio Access Technology) procedures (Handover video to GSM/UMTS, 2G vs 3G HO), eHRPD  hand-off between 4G (LTE) and 3G (eHRPD/CDMA) data works (1xRTT and EV-DO), optimization and continuous technical support to all deployment teams.

·               Interacted with Software Development team when receive problems or tracking problems.  Keep teammates informed about any problems seen while testing, test tool (JDSU, TEMS, Actix, Agilent).

 

IPTV, CVoIP, IMS Engineer

·               Experienced about IPTV (AT&T - Uverse) is provided in conjunction with VOD (Video On Demand) and may be bundled with Internet Service referred to as Triple Play service such as Web access and VoIP.

·               Experienced about next generation network technologies like: PON (EPON/GPON – TWC/BHN/CableLabs) – eg; GPON-Gigabit Passive Optical Network (single optical fiber is typically 32 and it consists of OLT (Optical Line Termination) at the service provider’s central office and a number of ONUs (Optical Network Units) near end users.

·               Testing Lightspeed 7750 (IP Routing-BSR-Broadband Service Router), 7450 (Ethernet Switch-BSA-Broadband Service Aggregator), 5620 SAM (GUI-Oracle DB), 7330 (FTTN Access), 7340 (FTTP Access), 5526 AMS (Access Management System), etc… Comprehend/assess networking/product issues as related to Triple Play (IP Architectures) integrated solution, defined by Alcatel & End Customers.

·               Experienced E/GPON and IPTV deployments with Layer 2, 3 technologies, TCP/IP, IGMP, RTP, RTSP protocols.

·               Working knowledge of Database (SQL, Oracle, Sysbase), OS (Windows, Unix, Linux, Solaris, AIX)

·               Defined drive routes (OSPF, BGP, IS-IS, Vlan,...), testing conditions and directs drive test teams based on project requirements.

·               Experienced with video technologies such as formats bit-rates, encoding, compression, streaming, multicasting.

·               Experienced in MPEG1-2 and 4, AC3, HE-AAC, Dolby Digital Plus, digital video and audio.

·               Create/Prepare/Update work orders/Trouble tickets/Status (Remedy, PVCS, DDTS, ClearQuest, ClearCase…) report for every issue related to systems (Netcool Fault Monitoring) or components, address customer request/issue include installation/configuration, software/hardware upgrade through out demo/trails/integration/migration to customer labs and production.  Worked as both an individual contributor and as part of multi-disciplinary teams.

·               Experienced about IPTV is provided in conjunction with VOD (Video On Demand) and may be bundled with Internet Service referred to as Triple Play service such as Web access and VoIP.

·               VHO (Video Hub Office) – Source for all video servers and video stream – Authentication of STBs (Set Top Box), Video CPE, IPTV Middleware.

·               IS POP – Provides IP Addresses and route to the Internet Backbone – Authentication of Residential Gateway (RG).

·               IP POP – VoIP SoftSwitching, feature server, and Gateways to the PSTN – Authentication of VoIP CPE (Radius, LDAP, DHCP)

·               Develop test plan and test execution for IP Service Assurance and Analysis of Connection with test modules support IPTV, VoIP, FTTx.

·               Experienced with system FTTP, FTTC and FTTH for GPON, EPON, DSL, ADSL and ONTs (SFU-Single Family Unit, MDU-Multiple Drilling Unit-WiFi), testing triple play solution for voice, data and video for data down stream up to Gigabit per second and HDTV.

·               Home (STB, Triple Play) – RG - ONT (SFU/POTS) – FTTx (GPON/EPON) – Broadband Switch 7450 – Broadband Service Router 7750 (DHCP, VHO,…).

·               Provisioned/Integrated the correct amount of bandwidth, dropping packets, CRC errors, host setting, stream setting, peak rates setting,…

·               Develop test plan and test execution, ATP (Acceptance Test Procedures) for IP Service Assurance and Analysis of Connection with test modules support IPTV, VoIP, FTTx.

·               Experienced with system FTTP, FTTC and FTTH for GPON, BPON and ONTs (SFU-Single Family Unit, MDU-Multiple Drilling Unit-WiFi), Set Top Box (STB) testing triple play solution for voice, data and video for data down stream up to Gigabit per second and HDTV 

 

Systems Test Engineer VoIP, IMS

·               Responsible for defining, scheduling, development maintenance, and custom release based on major feature releases, plus specifications for changes/additions for new and existing products based on customer feedback.

·               Developed and planned from the concept to the product development.

·               Developed test plans, test procedure, and test cases for VoIP, PS/CS Call, IMS/Push-To-Talk/Push-To-Show, and PoC features based on OMA specifications, 3GPP Standards, MRS.

·               Experienced in testing tool DebugMux, Wireshark, Empirix, TSP, Package capture and analysis, DNS and global load balancing.

·               Experienced in debugging, analyzing, capturing, and generated software problem reports when test case failures in Gn, Gi, Gr, Ga link, GPRS (SGSN/GGSN) network, IP phone, Handset SIP Phone.

·               Hand on and in depth know-how of VoIP, IMS architecture, SIP protocol, HTTP, SIP, DHCP, DNS, LDAP, Diameter, Streaming Protocols, Presence, RTP, RTCP, XCAP/XML, and TCP/UDP/IP, IPv4, SMTP, SNMP Management.

·               Developed test plan, test procedures/scripts, test verification, UAT, (automation and manual) based on test requirements extracted from hardware and software functional specifications, and product required documents. (eg;  HP/Mercury Interactive testing tool – Quality Center/Test Director).

·               Developed C/UNIX for coding, debugging, and testing (SUN, HP).

·               Experienced in writing scripts for automated test suits for regression, stress test, and documentation test results using TAPI (Tcl/tk), Test Director,…

·               Experienced SoftSwitch, Broadsoft testing, hands on testing with VoIP, VoATM, Voice  networks using H.323,  and voice response systems (T1/E1, SNMP, Codec G.711, G.729) and deploys automated test voice products (TDM, SS7, CAS, BRI, ISDN, DTMF, VGW, MGCP, GWC, H.248, AIN, Cisco).

·               Analyzed new technologies and solutions, visioning new technical possibilities and educating R&D, marketing and management.

02/92 – 01/96DSC Communications Corporation, Plano, Texas.

Sr. Systems Integration & Test Engineer

·               Coordinate/schedule, develop, interface with multiple internal group, and support full range of technical/product development requirements to resolve problems associated with failing test cases

·               Developed test plans, test cases, configuration, controlling test systems, analysis products for support of system test and evaluation (SUN, HP).

·               Integration and test a large high level software/Network Management Systems, testing of Switching Systems and Network Protocols (SS7, PBX, ATM & Frame Relay (Frame/Packet Switching, Cell Relay/ATM), TCP/IP, ISDN, SONET).

·               Worked on SONET measurement STS-1, OC-1 up to OC-48 transmission and multiplex testing, alarm stimulus/response testing, overhead and path trace programming and display, and clear channel OC-3 testing.

·               Worked on ATM measurement with variable rate cell generation for DS1, DS3 or OC3 rates, cell delay, cell loss count, cell loss ratio, traffic and performance analysis, alarm monitor, PVC, SVC, CAC, SNMP, MIBs, LMI, Congestion Handling, and ejection (AAL1, 3&4, 5, and VP/VC rates).

·               Experienced in writing scripts for automated testing (LoadRunner, WinRunner ,SUN, HP).

·               Knowledge of the purpose and process for reviewing specifications, design documents and code.

·               Experienced in problem tracking tools, coordinating and supporting failure review, analysis, corrective action, and hand-on experience in the lab environment.

·               Excellent communications and customer skills.

 

 

06/89 – 01/92Network Engineering Consulting, Iowa City, Iowa.

RF/System Engineer – Nortel Networks Division.

·               Performed analysis of measured data, in order to modify network design and enhance performance. Ensure the deployment of an optimum system, the service provider in line with the objective and the strategy adopts service coverage.

·               Developed test plans, test site scheduling, equipment calibration and setup, RF signal measurement and data analysis.

·               Performed microwave interference analysis as prior to actual RF transmission from a base station of a wireless network, remove or relocate microwave links to avoid any interference caused by the wireless system.

·               Defined the requirements and establish the design criteria to identify the network planning tools to use and the required databases.

·               Identified base station sites for system coverage provision, and perform site surveys with other network implementation teams, in order to verify suitability of the sites for zoning acquisition and construction.

·               Implement high performance operational wireless networks which include initial RF network design, re-design, regular design reviews, RF build verification, system RF acceptance, optimization and continuous technical support to all deployment teams.

·               Excellent technical and verbal communication and interpersonal skills.

 

ACHIEVEMENTCertificate of Achievement in the Supervisory and Management.

ATE Systems, T-Berd 224, Fire-Berd 6000, Sage 903A, Oscilloscopes, SS7, Understanding Wireline & Wireless, Data Network/Communication, LAN/WAN Networks, Networking, Network/Spectrum Analyzer, Signal Generator, Power Meter, Antenna, Tx/Rx Signal, DS1, DS3, ISDN , SONET, ATM, QoS, ADSL, IP, IPv4, SNMP, HLR & MSC, BSC, BTS, TDMA (HP-8920B), CDMA (HP-8924C), IS-95, IS-136, CDMA 2000, GSM (Rhode & Schwarz - CMU 200), WSS (Wireless Soft Switch), WMG (Wireless Media Gateway), Nethawk Analyzer,  Distributed Network Analyzer (HP-DNA), Spirent Test Center, Empirix/Hammer Analyzer, Wireshark, Empirix XMS Analyzer, Abacus 5000, UMTS, SGSN/GGSN, GPRS, HSDPA, TEMS, Actix, Agilent, Flexi BTS, Anite Nemo, Nera.

ALU FTTN 7330, 7340, 7342, E/GPON, Light Speed IP Routing 7450, 7750

 

AWARDS &ACTIVITIES             

Outstanding Honor Mathematics and Sciences, The University of Iowa.

Member of Institute of Electrical and Electronic Engineering (IEEE), The University of Iowa.

Interested in travel, swimming, soccer, and reading scientific materials.

 

REFERENCESAvailable upon request.