TECHNICAL SKILLS

• VoLTE/EPC/IMS/LTE/MSS systematical, end - to-end, extensive hands-on I&V experiences on PCRF, HSS, SGSN/MME, GGSN/GW, ePDG, eNB, CSCF, SBC, TAS, MRFC/P, MSC, MGW, SIP, RTP, Diameter, GTPv2/v1, S1AP, NAS, RRC, XCAP, H248, BICC/ISUP, MAP, SS7, SIGTRAN
• Deep understanding 3GPP/GSMA/ITU-T/IETF/ETSI standard series with details, able to reach out specific doc/chapter quickly if need be, update-to-date knowledge at 5G NGC/NR standard series, NB-IoT R13 updated specs, NFV standard, telecom data analyzing tech solution analysis, verification for VoLTE, VoWiFi, EPC/LTE/PCC, IMS, E2E QoS, SRVCC, 3G, plus 6 years customer support. Strong analytical skills to reproduce issues, quickly isolate it then locate root cause to fix. Successfully lead many large scale PoC, Field, Commercial wireless network verification, times assign into key projects at crucial moment to resolve complex issue

PROFESSIONAL EXPERIENCE

4G IP Solution Architect / Senior Verification Engineer

Confidential, Plano

Responsibilities:

• Customer unit pre-sale RFI/RFP clarification, product SoC(Statement of Compliant) analyzing, MRD(Market Requirement Development) request to R&D, customer presentation, end-to-end solution design.
• Create use case and test specification, plan and I&V(Integration&Verification), provide technical support and mentor team member, lead trouble-shooting and follow up discussion by collaborate solution team, R&D team, partners, vendors, or competitors when roaming and interworking in need, write regular customer report and issue follow up till final solution.
• Latest knowledge on 5G NGC/NR standard TR 23.799,TS 23.501/38.300 , NB-IoT R13 last June updated spec call flow.
• NFVI cloud execution hypervisor and cloud manager Atlas integration, VNF vEPC installation, configuration and verification.
• AT&T VoLTE/ViLTE First Field verification EPC technical lead, test execution, technical guidance to team members, issue resolve, use UE QXDM, Tektronix-Iris, Spirent nomad, Aeroflex UE simulator, JIRA, defect QA tools, etc.
• 4G PCRF/PCC I&V, manage policy for TMO/Rogers/Videotron/Southernlinc/EKN/Globalstar PCRF, by 23.203/29.212/29.213/29.214.
• T-Mobile VoLTE UDC trail PCRF-FE/HSS-FE engineer by TS 23.335, 29.335/23.203 , subscriber data retrieval and call test at:
• Telus VoLTE KPI consulting EPC test lead, weekly performance data collection and analyzing, write optimization report example like:
• Rogers VoLTE S8HR Roaming Solution Design, PCRF/EPC Solution Architect RFI/RFP with GSMA IR65/IR88 for feature like:
• Globalstar Voice over UMTS Satellite network testing by customized solution:
• Rogers VoWiFi/VoLTE network Integration and verification project, PCRF/EPC responsible:Write VoWiFi MO/MT/Registration, handover between VoWiFi and VoLTE call flow diagram with TS 23.402/23.401 o Verify E2E flow, ePDG, HSS, AAA at interface S2b/S6b,SWx,SWm/SWu interface by TS 29.274/29.273/24.302 ,rfc7296 o Integrate and E2E verify E911 Global PCRF FFI(First Feature Implementation) with TS 23.167/24.229 o Verify end-to-end VoLTE for audio and ViLTE for video services with IR.92/IR.94

4G EPC/LTE Senior Solution Integrator

Confidential

Responsibilities:

• CM(China Mobile) R&D Lab EPC/LTE function and MVV test E/// Test Lead, customer Q&A SPOC(Single Point of Contact), plan and build up test network under resource and schedule constrained environment, coordinate concurrent test and multi vendors with NSN, ALU, Moto, HW, ZTE, ensure test progress with quality, project completed on time, within budget.
• Customer unit pre-sale RFI/RFP clarification, product SoC(Statement of Compliant) analyzing, MRD(Market Requirement Development) request to R&D, customer presentation, end-to-end solution design.
• Responsible develop test methodologies and use cases, mentor junior engineer, classify and prioritize pop up issues to minimize impact on main activity, parallel debug and locate root cause rapidly, resolve it internally or engage system engineer, R&D team if need, report and update project stakeholders, management for overall assessment as well.
• Hands-on I&V PCRF/ MME/PSGW/HSS/DRA/eNB, handover,IRAT with 23.401/29.272/29.274/24.301/36.413/23.203/29.212/36.300.
• CM GPRS PCRF/PCEF Gx interface MVV test by E/// PCRF with NSN/HW/ZTE PCEF(GGSN), E/// PCEF(GGSN) with NSN/HW/ZTE PCRF.
• CM EPC PCRF(E/// SAPC) Network Acceptance License test for PCC function, Gx interface MVV with NSN/HW/ZTE GGSN/PGW.
• CM TD-LTE Large Scale Field Trial EPC lead, drive test, function and performance verification, collaborate with product, R&D team.
• Key project assignment examples at the crucial moment of project:
• CM LTE 18 cell peak throughput test lead, to setup test bed, coordinate eNB/IP backbone/EPC team, analysis bottleneck, resize link aggregation ports, adjust network topo to reach best LTE performance, to compete with NSN, HW solution.
• Hong Kong SmarTone LTE Multi-Vendor test project Team lead for S1/X2 testing with ZTE eNB, to keep market share.
• CM field customer EPC/LTE RFI/RFP emergency onsite solution support, to improve sale opportunity and win the contract.

IMS Senior Solution Integrator

Confidential

Responsibilities:

• Hands-on HSS, SLF, P/I/S-CSCF, TAS, SBC, MRFC/P, PGM, IMS-M, DNS, with protocol SIP, SDP, RTCP/RTP, MSRP, Diameter, LDAP, XCAP at Cx/Dx/Sh/Mw/Mi/Mj/Mg by 3GPP 29.228/29.229/29.328/29.329/29.163 , to test MMTEL 24.173 CFW/Conference, etc.
• Customer Unit Sale support and Product SoC, Solution analyzing for MMTEL, RCS, Messaging, VPMN, BCS, Centrex, SIP-BICC, etc.
• Test lead CM(China Mobile) R&D Lab IMS Function and MVV test with NSN/ALU/Huawei, develop test case instruction, setup test network, instruct team members work scope, worked with project stakeholder to complete test on time with quality assurance,
• HK Smartone IMS-CS interwork test by HSS/HLR by TS 29.002, CSCF/BGCF/MGCF with TS 29.163/24.229 , Q.765.5. rfc3261/3264.
• Sweden R&D Mobile-IMS Push-to-Talk/Weshare over GPRS/CS test by CSCF/HSS/PGM/MRFP,OMA-TS-PoC/Presence/XDM speci.

3G Senior Verification Engineer

Confidential

Responsibilities:

• Hands-on 3GPP R4 MSS network MSC-S, MGW, HLR, RNC, Codec call flow validate on Nc, Mc, Nb, Iu-CS/PS by BICC/ISUP, MAP, RANAP, RASAP, NbUP, INAP, SCTP, M3UA, with Q.1902.4/Q.765.5/Q. 763/29.002/25.413/25.423/25.415/ Q.1600/rfc4960/rfc4666.
• Test lead CM R&D Lab technical issue analyzing, internal discussion with System Architect/R&D, customer clarification session, handle multi-vendor interworking(Nokia/Alcatel/Lucent/Siemens/Motorola/Huawei/ZTE), ensure pass rate and complete on time.
• CM lab MPBN(Mobile Packet Backbone) site solution project with Cisco, Alcatel, HW router as Technical responsible, to verify signaling message re-route scenario from router IP link interrupt to convergence recovery.