Research & Development Experiences
Research Scientist, Facebook/Meta, Menlo Park, CA, USA , since 07/2017
- Big data, applied machine learning, artificial intelligence, and their applications on ads targeting and ranking, spatial computing, connectivity, infrastructure, network planning, network optimization, etc.
** Innovations to drive impacts and values
- Work duties have end-to-end flavor, including research, initiate product ideas, modeling, data analytics, algorithm design, product related design, prototypes, validation, convert prototypes to production, visualization, data production pipeline coding, and maintenance, etc.
Senior Staff Engineer, Specialist of Data Analytics and Wireless Networks, Futurewei Technologies, Bridgewater, NJ, USA , 03/2015 - 07/2017
- Research on big data, machine learning, artificial intelligence and their applications in wireless networks (including LTE/LTE-A/5G/NR(New Radio)). Utilize artificial intelligence to help generate new-value disruptive technologies and new business opportunities, improve the performance of the wireless networks, and help reduce the OPEX and CAPEX.
- Initiatives for disruptive technologies include bringing automation in wireless networks, especially for complex problems where the traditional methods are costing tremendous engineers men-hours, yet the effectiveness or efficiency is not up to scale.
- The machine learning techniques used or under investigation include time-series modeling/predictions, supervised/unsupervised learning, classification, clustering, anomaly detection, root cause analysis, association rules, reinforcement learning, transfer learning, deep learning, etc.
- Work duties are heavily products targeted, including research, algorithms design, validation, prototyping for products, field trials/tests, product algorithm document writing, and support for the final product development and maintenance.
Senior Staff Engineer/Staff Engineer, Samsung Research America, Dallas, 11/2013 - 03/2015;
Staff Engineer/Senior Engineer, Samsung Telecommunications America, Dallas, TX, USA, 10/2008 - 10/2013
- Research and standardization on mobile broadband wireless networks
o 4G/5G standards/products patents.
o Research on next generation wireless networks; 5G PHY/MAC/network design (as one of the pioneers); research on millimeter wave communications
o Standardization in 3GPP, LTE/LTE-A, contributions to 3GPP LTE/LTE-A standards.
o Research on intelligent networks, including big data analytics, content-aware, context-aware, energy-aware networking, SDN, NFV, SON
o Research on heterogeneous networks (HetNet), including interference management, mobility management, cell detection and selection, self organized networks, small cell power control, etc; research on device-to-device communications, machine type of communications.
o Contributions to IEEE 802.16m and 802.16x WiMAX
- Research on Internet of Things, Smart Grid, Machine to Machine (M2M) communications
o Research on smart grid and green home, architecture and algorithms for demand response in Smart Grid, disaggregated energy sensing in Smart Grid
o Research on machine learning, training for energy monitoring and sensing
o Contributions to M2M communications
- Research and standardization on Wireless Personal Area Networks (WPAN)
o Contributions to IEEE 802.15 WPAN specially on Visible Light Communication (VLC)
Research Assistant, Electrical Engineering Dept., Princeton University, NJ, USA, 2003-2008.
- Research on optimization in communications and networks
o Research on utility based optimal network operations for multimedia applications
o Research on network resource allocation, network congestion control, network stability
o Proposed advanced optimization frameworks in communications and networks
o Proposed advanced algorithms and proved effectiveness
- Research on information theory
o Research on duality in information theory and proposed duality in error exponents
o Research optimization problems and algorithms in information theory and proposed improved algorithms
o Studied coding theory and proposed fountain codes over a space-time coded channel
Visiting PhD Student, Multimedia Research Lab, Motorola Labs, Schaumburg, IL USA, Fall 2007.
- Research on joint source-channel coding and scheduling in wireless video broadcasting (e.g., for mobile TV), cooperation in peer to peer (P2P) live video streaming, and cross-layer video transmission over Internet
- Proposed advanced algorithms and showed effectiveness
- Demoed advanced cross-layer video transmission
Visiting PhD Student Swiss Federal Institute of Technology (EPFL), Switzerland, Summer 2007.
- Research on network operations for competing multiple description transmissions over multiple paths, focusing on resource allocation, joint source coding and congestion control
- Proposed advanced optimization frameworks, proposed algorithms, and showed effectiveness
- Theoretically proved that opportunistic source coding (e.g., layered coding) performs better than multiple description coding when many users competing the same resource
Junior Faculty, Dept. of Electrical Engineering, Xi'an Jiaotong University, P. R. China. 2000-2003.
- Research on the 3rd Generation (3G) and beyond 3G wireless systems, focusing on multiuser detection, space-time processing technologies and multiple input and multiple output (MIMO) systems.
- One of the co- investigators for multiple projects
- Instructor on wireless communication, information theory - basic.
Visiting Scholar, New Value Group, Network Systems Development, Fuji Xerox Co. Ltd., Japan, 2000-2001.
- Research and development on multipurpose Linux servers to simplify networking
- Successfully conducted advanced prototypes of multipurpose Linux servers and tested remotely with Xerox Palo Alto Laboratory (CA, USA)
Research Assistant Personal Communications Lab, Xi'an Jiaotong University, P. R. China.
- As a graduate student, researched on power control algorithm in multimedia CDMA wireless networks.
- As a senior, designed and built a signal-tone generator circuit board (including PCB design), and won the Best Bachelor Project Award.
Standardization Activities
Nov. 2008 to Mar. 2015
- Contributed to heterogeneous networks (HetNet) including interference management (including coordinated interference cancellation and mitigation, etc.), mobility management, self organized networks, small cell power control, etc., Machine Type Communications (MTC), device to device communications, dual connectivity, Coordinated MultiPoint (CoMP) communications, etc.
- Delegate in 3GPP RAN1/RAN2. Contributions to 3GPP LTE/LTE-A
- Chaired multiple ad-hoc sessions and globally organized/led discussions on heterogeneous networks in IEEE 802.16.
- 100+ contributions to IEEE 802.16 broadband networks, 20+ contributions to IEEE 802.15 body area networks.