4G/5G Performance Optimization & Test Engineer
Resume:
Tesfamicael Adhanom
San Diego, CA.
*********@*****.***
TECHNICAL SUMMARY
Wireless technologies
4G LTE, 5G NR,UMTS/W-CDMA, CDMA 2000, 1xEV-DO Rev 0 & Rev A, 3gpp/3gpp2 standards, IMS, SIP, TCP/IP, UDP
Test & emulation solutions
Rohde & Schwarz TS-8980/CMW-500/CMU200, Keysight E7515B UXM 5G, spectrum analyzers
& signal generators, Anite SAT/SAS/CT, Spirent Systems (Spirent 8100, Test Drive II/SC, Task kit, PLTS/LTS/TTCN-3), Agilent 8960, Aeroflex, w2bi automated test solutions, Protocol analyzers
Wireless Carriers/Operators
Verizon Wireless, Sprint, AT&T, Bell Mobility, China Telecom Programming
C, C++, Perl, Python, API programming, Object Oriented Programming principles Software test & development
Requirement review, analysis, test case & process development, SDLC Software tools
Qualcomm tools (QXDM, QPST, QCAT, RL Editor), Wireshark, GitHub, ClearCase, Perforce, TeamTrack, PVCS Tracker DOORS
Project management/Communication
Project mgmt/coordination/tracking,presentation and customer facing PROFESSIONAL EXPERIENCE
Sr. Staff Engineer - System Integration & dev’t - R&D Tech Mahindra Technologies @Keysight Technologies (05/22 - 05/24) Supported Keysight Technologies inc. Tier-1 customers. Development, system integration and product validation of Keysight 4G/5G test measurement solutions. Support development, integration of systems and test solution for evaluation of 4G/5G products based on industry standards and operator requirements. Direct support of major customers in the ecosystem including major chip suppliers, OEMs and test labs. Attend technical training (Organized and Self study):
- Qualcomm 5G Certification training ( 5G NR Air Interface Training,5G NR Call Processing:SA/NSA)
- 3gpp UE conformance Test (Protocol, RF, RRM)
- 3gpp 5G protocol stack, 5G core
- Beam forming, massive MIMO, RF, VoNR, Data throughput performance debugging/Analysis
Sr. Staff Engineer - Product Dev’t, Sys. Integration & Testing - 5G Small cell NW eTeam inc @Corning inc., Wireless Division (11/2020 - 03/25/2022) Development, system integration, feature validation, performance & protocol analysis for 5G (mmWave & sub-6GHz) small cell Radio Access Networks (small cell RAN) focusing on Air interface, E2E performance, and Call Processing.
Lead & coordinate lab testing, analysis, debugging and triage of feature and system issues and coordination with cross-functional teams including engineering and product management. Requirement review and analysis, define system/feature test specifications and plans. Test automation, scripting.
Lead and coordinate interoperability testing with RAN and core network vendors as part of carrier certification and customer acceptance procedures Areas of expertise:
LTE and 5G system and 3GPP specifications and protocols, including PHY, MAC, RLC, RRC and PDCP layers. LTE/5G DL/UL scheduling, power control, beamforming, MIMO LTE and 5G air interface protocols, call processing technologies and NSA network architecture Staff Engineer - System Integration, Test & Certification Mindlance inc @ Qualcomm Technologies inc. ( 04/2015 - 06/2017) System level modem feature integration and test, feature requirements review and analysis, develop test case specifications and strategies, interoperability evaluation, troubleshooting/analyzing/triage issues, executing interoperability tests Coordinate and support Qualcomm multimode chipset modem products for conformance to operator and industry standards and requirements. Supported product certification for major NA operators (Verizon/AT&T/Sprint) and China Telecom. Area of expertise:
3GPP2/3GPP specifications and protocols (CDMA/UMTS/LTE), air interface protocols, call processing technologies and network architecture. Develop/maintain test automation utilities
and frameworks.
Digital communications systems, RF propagation, CDMA, OFDM, telecommunications concept sPhysical/MAC layers and Call Processing concepts, Wire line and wireless data protocol stacks including RLP, PPP, IP, TCP, IPV6, and MIPV6, SIP, IMS, IP telephony standards Product certification, compliance and processes - GCF/PTCRB, major NA operators
(Verizon/ AT&T/Sprint) certification including pre and post product roll out support. Staff Engineer - System Integration, Test & Certification Novatel Wireless/ Inseego Corp.(11/2008 - 12/2014) Lead and coordinate system level integration testing of Novatel Wireless broadband, M2M and IoT products for compliance to operator and industry certification requirements and specifications. Involved in the successful launch of generation of core Novatel Wireless products – MiFi Intelligent Mobile Hotspots, M2M modules and enablers, Ovation USB/Merlin Data card modems and Expedite Embedded modules - based on evolving 2G/3G/4G chipset technologies and solutions
- Coordination and technical support of UE certification testing at Carrier, IOT and 3rd party certification labs.
- Technical support of GCF/CCF/PTCRB approvals and certification
- Product testing, evaluation, analysis and debugging for compliance to operator and industry standards and specifications. Expertise in LTE modem protocol signaling conformance/ performance evaluation and debugging. Good knowledge of L1/L2/L3 LTE protocol stack. - Analysis, debugging, root causing and resolution of IOT, lab conformance, field and Operator Acceptance issues.
- Review and evaluation of carrier requirements and test plans, monitor new changes and evaluate testing and product compliance impacts
- Extensive customer and vendor interfacing/support experience- Carrier labs (VZW NDET
,Sprint STICK / Reston IOT NRT, AT&T ), Infra. IOT labs ( Alcatel-lucent, Ericsson, Nokia Siemens) 3rd party certification labs(7 Layers, Cetecom, SGS, Intertek, Tech Mahindra), Test Equipment vendors (Rhode & Swartz, Spirent, Anite, W2bi, Agilent/Keysight, AT4) - Test case / call scenario development, validation and debug of TTCN-2/3 based test cases and scripts - Anritsu RTD, Keysight PRT, Spirent, Rhode & Swartz
- Coordinate, schedule and support upgrade and maintenance of lab test equipment - Mentoring and guiding junior staff, providing lab technical support to internal engineering groups - Attended industry conferences and training seminars representing Novatel Wireless Inc., provided technical training presentations to internal teams. Area of expertise:
3GPP2/3GPP specifications and protocols (CDMA/UMTS/LTE), air interface protocols, call processing technologies and network architecture. Digital communications systems, RF propagation, CDMA, OFDM, Wire line and wireless data protocol stacks including RLP, PPP, IP, TCP, IPV6, and MIPV6, SIP, IMS, IP telephony standards Product certification, compliance and processes - GCF/PTCRB, major NA operators
(Verizon/ AT&T/Sprint) certification including pre and post launch support. group driving product testing activities.
Area of expertise:
3gpp2 specifications, cdma air interface protocols, carrier acceptance testing & product certification
EDUCATION
M.S., Computer Science
San Diego State University
B.Sc., Marine Biology
University Of Asmara,
Eritrea
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