Lucy (Yunqing) Liu

***** ** **** ** ********, WA 98006

425-***-**** acb49g@r.postjobfree.com

Objective:

Experienced professional with 7+ years in designing/testing mobile web product and technical project

management seeks RF performance Engineer position to utilize strong System Design / Mobile Testing

experience, exceptional Organizational Ability and Communication Skills.

Skills:

Extensive System and Web Application Experience on Windows/Linux platform

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Expert Knowledge of Wi Fi specification (802.11 a, b, g, i), and Wi Fi/Bluetooth device testing

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Expert knowledge on Network protocol (TCP, UDP, IP etc.)

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Comprehensive System Deployment and Administration skills

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Excellent system and Application troubleshooting capability, Incident Management

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Good with different technologies like GSM, UMTS, CDMA and LTE

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Good RF fundamentals understanding of Radio Frequency (RF) systems and propagation

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Proficiency with RF test equipment and tools, such as, Spectrum Analyzer, Network emulator, call box,

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etc.

Professional Expérience:

T Mobile USA, Bellevue, WA 2008 – Present

System Design Engineer

Major Project Assignments:

Business Tool (BT) Flex receives Text messaging records. Using this information, it offers T Mobile two

extremely useful features: the Message History Tool, and the Business Objects reporting interface.

Primary responsible for design, implementation and daily operation for the BT Text message system, including

system API design, Storage design and implementation, staging environment setup and testing, Web

Reporting Site design and implementation, documentation and operational hand off to tier II NOC

Responsible for defining and maintaining Web Based BT(Business Tool) platform for Text messaging

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Reporting

Primary contributors to design Storage features and Reporting of the Message History Tool, and the

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Business Objects reporting interface

Reviewed vendor architecture and feature proposals

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Monitor BT platform and makes technical/process recommendations for improving efficiency

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Review MOP and Drive BT upgrade successfully in lab and production.

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Test and troubleshoot the call flow of any individual Text message or any class of Text messages

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Leading cross functionally to ensure the teams implement the business vision efficiently

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T Mobile USA, Bellevue, WA 2006 2008

RF / Mobile Terminal Engineer

Lead engineer to design, implement and hand off the first Wi Fi UMA device system in T Mobile

Primary contributors to design UMA handset feature, driven technical details into handsets and ensure

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better performance, launched 1st UMA device in 2006

Responsible for testing interoperability of UMA handset with various AP and found issues related to

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connectivity, range, and voice quality

Test and resolved key issues for seamless hand over between Wi Fi and GSM network, multiple call

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support on UMA network at one AP, efficient bandwidth utilization, QoS implementation

Conducted testing activities in all phases of the development process, including analyzing systems

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requirements for testability; deriving test requirements and test plans

Traced, Analyzed and Troubleshoot UMA TCP Dump with Ethereal Simulator and Spectrum Analyzer

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Performed and verified handset data testing and validation: NAB, JAVA, JAVA Status, OTA, WAP/my5,

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FOTA, Wi Fi and drive testing

Reported new bugs; maintain issues lists (Mercury Quality Center), and requirements documents

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Communicated in the company positions to various vendors and suppliers, coordinating issues and

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analyzing/troubleshooting problems

IBM (CHINA) COMPANY LTD., Beijing, China 1999 2001

Quality Assurance Engineer

• Defined and tracked quality assurance metrics such as defect densities and open defect counts.

• Designed ATP cases and process flow for the internal Asset Management tool

Developed retrogression testing scripts with SQL and implemented final testing of new IBM CAAPS

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database

SIEMENS (CHINA) COMPANY LTD., Beijing, China 1998 1999

Base Station System Engineer

• Tested Italtel BTS902 Um interface with Racal and identified defects with the Base Station RF Combiner

• Traced and Analyzed Siemens BTS 60 Base Station Um interface message for ATP with China Unicom

• Site survey for macro and micro cells (antenna location recommendation, propagation tests, etc for in

building coverage for the “Shopping Center”).

EDUCATION

M.S. Electrical Engineering, Alfred University, Alfred NY, USA, 2004 2005

B.S. Electrical Engineering, Alfred University, Alfred NY, USA, 2002 2003

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