Ray S. Lee

TEL: (214)810-6168  email:rayshanlee1@gmail.com

 

Summary

·         Team-oriented Software Engineer/System Architect with over 20 years experience in telecommunication software design and management

·         Designed the scalable OSS architecture that manages eNodeB and EPC (MME, HSS, PCRF and S/P Gateway) via SNMP interface and provided performance evaluation capabilities interact with marketing toolset.

·         Led team of integration engineers to perform Interoperability test between eNodeB, MME, HSS, PCRF and S/P Gateway and carrier OSS system.

·         Designed Performance Management solutions that collect current data from NE and provide analysis tool to detect troubles early before a costly service outage occurs.

 

Education:

·         M.S. in Computer Science (EE/CS) from Northwestern University.

 

Accomplishments

·         Received fellowship award from AT&T on paper submission to 3GPP LTE Performance Management Technical work group

 

Skills:

Object Oriented Design, CORBA, C/C++, Java, XML,

SNMP, Network Management System, Element Management System

LTE/WiMAX, UMTS              

Rational Rose/Visio 2000/MS Project

 

Experience:

AT&T, San Ramon, CA               2008 – Present

Principal Member of Technical Staff

·         Managed RFP efforts and met with all potential vendors for product presentations, requirement analysis. Defined system requirement and detail technical work items to vendors’ technical team. Oversee the RFP process to ensure products can fulfill the requirement of future deployment.

·         Managed FFA for LTE services on four US Zones. Successful field trial starting from FFA lab to production. Deployed 625 systems which are now installed and turned up within nationwide LTE network. More than 90,000 subscribers with LTE CSFB service supported to date.

·         Worked closely with vendors on defining requirement/specifications for variety of Overload Control tools to prioritize/classify traffic during congestion period, perform end-to-end overload control to mitigate the congestion issue and ensure services can be delivered during overload condition.

·         Lead an AT&T PM OSS team to integrate LTE S/P Gateway Northbound interface on Performance Management. Achievement includes: Implement PM data collection on 15 minutes, hourly and daily report. Graphic design for Performance Trending.

·         Lead an AT&T FM OSS (Netcool team) team to integrate LTE S/P Gateway Northbound interface on Fault Management. Achievement includes: fault correlation, root cause analysis on transport layer and real time monitoring of traps from each individual Network Equipment.

·         Work with S/P Gateway vendors’ EMS team to design the northbound interface, perform IOT testing, and write/implement integration test plan.

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Samsung, Richardson, TX               2005 – 2008

Senior System Architect

·         Lead a Long Term Evolution (LTE) team to launch high speed wireless network nationwide that provides high speed data services using LTE devices and future voice plan.

·         Led team of IOT test engineer to perform Diameter-based application IOT which includes PCRF Gx interface testing with PGW, Sp interface testing with SPR and real time usage update with Balance Manager via Sy-like interface.

·         Managed RFP efforts and met with customers for product presentations, requirement analysis. Defined system requirement, provided requirement documentation for development team and prepare answers to RFP.

·         Designed the scalable EMS architecture that manages eNodeB and EPC (MME and S/P Gateway) via TL1 and SNMP interface and provided northbound SOAP and SNMP interface to customer’s OSS suite.

·         Designed Performance Management solutions that collect current data from NE and provide analysis tool to detect troubles early before a costly service outage occurs.

·         Led team of MME and Gateway engineers to perform Interoperability test with PCRF vendor for policy control in multi-vendor environment. Led team of engineers to perform Lawful Interception functionality test with third party vendor.

·         Led team of test engineers to perform CSFB on S102 Interface Interoperability test with IWS.

·         Led team of test engineers to perform Interoperability test on S101 interface between eRNC and MME on tunneling procedures.

·         Led team of System Engineers to demonstrate a proof of concept Application Architecture which enables LTE mobile subscribers to perform video streaming, video conferencing, online gaming and rapid file transfers with data speed up to 75mbps.

 

 

 

IXIA Corp., Richardson, TX               1989 - 2005

Senior Member of Technical Staff

Lead an IP-based IMS performance test team to perform interoperability test between existing wireline, wireless and emerging IP-based communications networks.

Major achievements include

·         Design call session control for SIP based protocol verification tool which can stress test million of INVITE messages per test module to allow customer to perform bandwidth utilization analysis in the lab environment.

·         Worked closely with customer’s product validation team and provide the protocol breadth, stack depth, and traffic/signaling capacity required to stress and verify IMS network elements

·         Strong hands-on in full-cycle application development from requirement gathering, high level design, detail design and product deployment

·         Design test suites which utilize scripting language to formulate configurations for any of the four primary IMS functional areas: access network, core network, interworking elements, and application servers. Key test scenarios include: Standard call generation, Function test suite creation, Negative testing, Handover scenarios, Load and capacity testing, Application signaling and bearer traffic

·         Delivered a GUI-based EMS to be integrated into customer’s NOC. EMS manages the OSMINE-certified devices, providing service providers with all the fault, configuration, accounting, provisioning and security (FCAPS) features required for a manageable and reliable Triple Play service offering. It automates a number of complex, tedious, and error-prone tasks, thereby raising productivity, improving accuracy and reducing operational costs.

·         Designed Performance Management solutions that collect current data from NE and provide analysis tool to detect troubles early before a costly service outage occurs.

·         Coordinated with other IPTV equipment vendors and led the team to perform interoperable/trial test between media server, DSLAM IP concentrator/IGMP proxy functionality and CPEs.