Andy Yi

Email: yisanjun@hotmail.com

Tel: 469-396-6506 Address: Dallas TX

Summary

• 10+ years in 4G/LTE system (Developer, FOA, commissioning, optimization);7+ years in CDMA          
• 19+ years’ direct mobile experiences with Lucent, Motorola, ZTE, Samsung and TELUS, Sprint
• Rich road test, optimization, commission, feature test, and Sprint FIT/commercial experiences
• Expertise on feature develop, RAN & RF parameters, counters and KPI deep analysis 
• Rich experiences on load balancing design and analysis (inter-band, inter-RAT, users based…)
• RAN1 standard engineer (R8~12/13) with patents, LTE System Designed for L1/L2/L3
• Experienced test cases design, and call flow analysis of RAN/EPC/3G
• End 2 end integration services on RTU/Modem, LTE/EPC, and CPE diagnose
• Experienced with TCP/IP, Unix, Assemble/C/C++, EMS/OMC, and VoIP/NGN/IMS
• System Engineering & Writing SRS & System Architecture; Lead Product development
• Trained with Spirent LTE/EPC test (eNB, MME, SGSN, eHRPD, HSS, GW)(S1, S5/8, S3,S4,S6a)
• Collaborative and interactive team work with a diverse set of partners and customers

Professional History

Senior RAN Engineer for ZTE largest LTE network rollout and optimization in USA • 2015~pre

Responsible for Commissioning RAN (eNB, EMS), network optimization and design adjustment

·   Reviewed network design/simulation, CIQ; built eNB configuration, EMS, SCTP, Baseband/RRU, and Radio parameters (MIMO, frequency, Prach, PCI…), neighbor relation…

·   Performed months’ road testing with eNB, cluster to areas, analysis, optimization suggestions for down tilt / azimuth, adjust power, Ncs, …,

·   Mitigated overshot, PCI confliction, and interferences; checked handover, cell-reselections setting, found top cell by checking handover pair for Network optimization (RSRP, Tput)

·   KPIs, RRC release, PRB utilization, Noise, MCS analysis for network Optimizations

·   Diagnosed CPE, trouble shooting and CPE logs for SQN R&D developing new releases

·   Compared N=3 and N=1 network design, and the 4 sectors and 3 sectors network design

·   Remote supported load balance test(based on user numbers) method, KPIs and report

·   Successfully Demo / Consult LTE system, build trial for new customer

·   Substituted technical support for ZTE CDMA network, conference calls with customer, guide road test, tickets review, and CDMA 1x and EVDO coverage differences troubleshooting

·   Feature communications and Planning: Cloud RAN (eICIC), Carrier Aggregations, and LAA

·   Guidance to customers on eNB commissioning, Road test and network optimizations
 

Samsung Telecom America                                                       Herndon, Virginia                          2014~2014                                                       

LTE System Engineer for Top Gun Project, Sprint FOA/FITs, KPI analytics

·   Supported Chicago market performance improvement from system team

·   Verified Sprint-Samsung Tri-band balancing performance and discussed the optimization

·   Analyzed AT&T, VZ networks’ inter-band parameters by the logs of (MIB & SIBs)

·   Worked with drive test for FITs (Indy & Minn), T2 with detailed Counts for KPIs

Ø       Tested SON feature phase 1, and analyzed PCI & RSI confliction with Perl script

Ø       Tested C-DRX, and latency analysis across MAC, RLC and PDCP

Ø       Introduced new counter, and DL Control Channel CCE aggregation level analysis

Ø       Tested FDD LTE Inactivity timer change and analyzed impact on Tri-band network

·   Provided scheduling optimization algorithm to minimize PDCCH utilization

·   Worked with Lab, completed UL Power control (P0, α) simulation and analysis for Softbank

·   Samsung feature design (LTE SON, Small cell, Positioning, HO, BF/AAS…)

 

ZTE Inc. ZTE alliance,                                     Shenzhen & Beijing  China                    2007 – 2013

LTE System Design, System requirements and interfacing standard & algorithms    09~13

·   Wrote RAN system requirements interfacing with China Mobile and TD-LTE expert group

·   Managed eNB PHY requirements, MIMO, RF specifications and LTE releases/feature

·   Evaluated most physical algorithms, and optimized eNB PHY algorithms detail design

·   eNB system software high level design (CP and UP), evaluated FPGA, DSP, and RF chips

·   Designed all inter-module (GRM/CP/UP/BB) massages for UE simulator / CPE

·   Analyzed Link budget & in/out door coverage for China Mobile, LTE 230M, and 1800M PTT

·   Co-designed SON feature with OMC, and Communicated with customer the Roadmap

·   Analyzed LTE interference and network design; Assisted the tools (APOX) development

·   Designed LTE230 OFDM symbol, Frame structure, PHY channels, CA; re-design RRC

·   End to end integrated features on LTE/EPC in Lab, and performance optimization

·   Participated in TDD-LTE optimization expert group for (PoC, Trial, Pre-commercial)

·   Conformance tested system and analyzed call flow of RAN, EPC (MME, HSS, S/PGW, PCRF)

·   Evaluated contributions RAN1 (R10~12/13), and participated in 3GPP and IMT conference

Principal Standard Engineer (RAN1) Wireless Standard and Advanced Research, ZTE Inc. 07~09

·   Represented ZTE for IMT-A, IEEE802.16e/m and LTE 3GPP RAN1 international conferences

·   Interfaced to BTS product R&D team with tech updates and release, features management 

·   Conducted research on MIMO, and initiated early C-RAN research with China Mobile

·   Jointly researched in Femto/Small cells, virtualization with company-wide team

 

Xinwei Telecom Technology Inc.                                 Beijing, China                  2005 – 2007

Xinwei, good at MIMO/BF/AAS, a sibling company of Navini System, acquired by Cisco in 2007

Senior Product Develop Manager, and Senior Standard Engineer

·   Developed IP core and guided WiMAX product (BTS & CPE/Card, phone, EMS) develop

·   Built trial network, cell site selections, road test, optimization and demonstration 

·   Participated in IMT_A and 3GPP RAN1 standardizations representing Company

 

UPT, acquired by Continuous Computing (CCPU)         Shenzhen/Beijing, China          2003 – 2005

Senior Engineer, Product Manager

·   Co-designed IP mobile core product (IMS/Gateway) for Xinwei Telecom Technology

·   Developed IAD, Session Border Controller, joint solution with SIEMENS, SONUS Soft Switch,

·   Communicated the customer requirements, partners, ODM, and total solution consulting

 

TELUS Mobility         (CDMA, iDEN and HSPA/LTE)                    Toronto, Canada                 2000 – 2003

Principal Network Planner      

·   Network plan & design with coverage & capacity, new features

·   Managed KPI, utilization, traffic forecast, and expansion budgeting / Capex

·   Evaluated new technologies, and coordinated vendor selection

·   Planed SS7 consolidation, NGN transition; SigTran test, 1X and EVDO test

 

AT&T Canada Inc.                                                                                   Toronto, Canada            1999 – 2000

IP Network Technician

·   Provisioned data/IP network with Cisco Router, Switch, ATM, SONET & T1

·   Supported IBM and AT&T joint cloud computing and storage service

·   Designed the backhaul network leased to TELUS Mobility

 

Lucent Technologies - (Nokia Networks)                                    Guangzhou, China             1994 – 1999

Technical Support Engineer, Senior Wireless System Engineer                 

·   Led MSC, PDSN tech support, eNB upgrade, network optimization antenna tilt and drive test

·   Performed system test, call trace for Lucent CDMA FOA with R&D team

·   Supported for CDMA IOT, roaming test with Motorola, Samsung and Nortel

·   Supported GSM IoT with SIEMENS and GSM handover, MAP V2 certification

·   Supported STP/SS7 conformance test, and Centrex FOA test with Chicago team

·   Technical supported ATM FOA, SDH/DACS and Network Management /EMS

 

SIEMENS - (Nokia Networks)                                                       Guangzhou, China         1993 – 1994

Technical Support Engineer    

·   Performed Lab and field test, debug, performances analysis (Jitter, wander)

·   Provided customer training on Network Management, SDH standards, EDFA

·   Supported SIEMENS-Motorola Mobile network rollout

 

Patents : The first author with 7 granted wireless patents covering MIMO/eICIC, Small Cell, TDD coexistence, Machine Type communications, Sounding RS, CA and Dynamic Virtual carriers

 

Education, Training & Self-studying

·   Pre-Doctor courses, joint Ph.D research (Wireless Communications) BUPT  2007–2012

·   Bachelor, Electronics    Tsinghua University                1988–1993

·   M.B.A.   Sorbonne                                                                                                   2004–2006

·   College English (II, III), French, Accounting          Toronto                                   2002

·   Business Management              Lawrence Tech University USA             2002–2003

·   EMS/OSS Develop & Test in Lucent Technologies UK                                         1997

·   Project Management/Team Coach/Market & Sales   Lucent China                 1998

·   (Sun) Unix System Administrator & Network Administrator                             1998

·   IPD workshop & Product Management                                                                      2006

·   Software Architecture                                                                                                       2012

·   EPC/LTE test training  (Spirent Communication)                                                    2013

·   Wireless Charging/Openflow SDN/Quantum info science (Self study)    2014-2015

·   Spirent LTE/EPC test training (eNB, MME, SGSN, eHRPD, HSS, GW) Dallas    2013

·   And ALU LTE Study: eNB, NEM, Small cells Network design and IMS                 

 

Awards

·   Top CVA (Customer Value Added) in Lucent   for China Telecom project    1996

·   Spot Award                         Lucent         CDMA FOA                                                  1997

·   Spot Award                         Lucent    GSM system test for MII certified              1998

·   Excellent Team Leader (Product team)  Xinwei Telecom                                   2004

·   Golden Team (LTE system design team)                                                       2010 & 2012

·   Excellence in Computer Programming Design                                                       1987

 

Languages (With great interests in Language and history)

Fluent in Chinese (Mandarin & Cantonese) & English; Germany (Second foreign language)

Very basic communication in French, Korean and Japanese 

 

Volunteer

Core member of RoG, 2003~2013, Supported hope backpack and hope school in China & Africa