SDN-based WLAN designs

Multi-Input Multi-Output (MIMO) technology is emerging as the default choice for wireless networks. The wireless industry is continuously pushing toward increasing the number of antennas per device. Simultaneously, there is a proliferation of wireless devices with diverse form factors. These range from large devices, like desktops and laptops, to small devices, like temperature or light sensors, and a whole range of devices in between, like smartphones and tablets. The physical size of these devices intrinsically limits the maximum number of antennas that they can support. The combination of these two conflict trends - a growth in the maximum number of antennas per device, and an increase in device diversity - means that future wireless networks will be populated by heterogeneous APs and clients supporting different MIMO capabilities. Our research goal is to design multiuser MIMO systems that enable efficient medium sharing among users with heterogeneous hardware capabilities and dynamic channel conditions.

RF-based sensing

With the growing popularity of IoT applications, human increasingly need a more friendly and flexible interface to interact with "things" and be understand by "things". Conventional designs heavily rely on camera or wearable/tangible devices to sense human behaviors. Those approaches, however, have a key concern about privacy and might not be feasible all the time. RF-based sensing, hence, gains lots of attention nowadays. By understanding the tiny variation of RF signals, it is possible to sense the small changes in environments. This technique creates several interesting IoT applications that help develop human augmentation. For example, human can perform gesture to remotely control different machines in home without equipping any physical devices. Or, home care can be realized without introducing the intrusion into the privacy of individuals. We hope to leverage those rich RF signals to look for new IoT applications.

Wireless multimedia systems

Statistics have shown that 50% of US Internet traffic is video streamed from Netflix and YouTube. How to efficiently stream a large amount of video traffic while providing quality of service is still one of the most challenging network problems. We are developing mobile video applications and new architectures to adapt to dynamic network conditions and improve video experience on wireless mobile devices. On the other hand, social networks, such as Facebook and Twitter, is a new form of multimedia networks connecting people on the Internet. We are also interested in exploiting networking concepts and skills to understand social behaviors and study how to distribute influential information over social networks.

Research Grant

  • Remote Home Healthcare using WiFi Signals
    MOST(優秀年輕研究學者計畫) 106-2628-E-009-004-MY3, PI (Aug 17 – Jul 20)
  • Sub-meter Localization in Smart Factory
    Delta-NCTU Cooperation Project, PI (May 17 – Apr 18)
  • On Enabling Flexible Uplink Network MIMO Clustering
    MOST(優秀年輕研究學者計畫) 104-2628-E-001-004-MY2, PI (Aug 15 – Jul 17)
  • Performance Enhancement for Wireless Multi-Party Conference Call
    AWIND Cooperation Project, PI (Jun 15 – May 16)
  • Non-Orthogonal Medium Access for Full-Duplex Communications
    Industrial Technology Research Institute Cooperation Project, PI (May 15 – Mar 16)
  • Cross-layer Network Designs of 5G Ultra Dense Small-Cell Networks
    Academia Sinica Thematic Project, AS-104-TP-A05, PI (Jan 15 – Dec 17)
  • SDN-enabled Cloud-based Wireless/Broadband Network Technologies & Services
    MOST University-Industry Collaboration Projects, MOST 103-2622-E-009-012, Co-PI (Aug 14 – Jal 16)
  • Next-Generation Collaborative Vehicle Safety System
    Intel-NTU Connected Context Computing Center, Co-PI (Jan 14 – Dec 15)
  • Access Control and Rate Adaptation for Heterogeneous Full-Duplex Wireless Networks
    MOST 103-2221-E-001-017-MY2, PI (Aug 14 – Jul 16)
  • Next Generation Random Access Multi-User MIMO Networks
    NSC (優秀年輕研究學者計畫) 102-2221-E-001-012-MY2, PI (Aug 13 – Jul 15)
  • Information Delivery Middleware for Disaster Management over Heterogeneous Interwoven Communication Networks
    NCP 102-2219-E-002-022-, Co-PI (May 13 – Apr 14)
  • Enhance QoS of FreeRDP-based Cloud Virtual Desktop
    Institute for Information Industry Cooperation Project, PI (Mar 13 – Nov 13)
  • Resolution Adaptation based on Network Quality and Region Importance for Desktop Virtualization
    Institute for Information Industry Cooperation Project, PI (Mar 12 – Nov 12)
  • Content Diffusion over Mobile Social Networks
    NSC 100-2221-E-001-005-MY2, PI (Aug 11 – Jul 13)
  • OpenISDM – Sub-Project 6: Open Information Gateway
    Academia Sinica Thematic Project, AS-101-TP2-A01, Co-PI (Jan 12 – Dec 14)
  • Rate-Adaptive Video Multicast for Heterogeneous Clients over Wireless Networks
    NSC 99-2218-E-001-005-, PI (Mar 10 – Jul 11)
  • Load Balancing for Large Scale Upload Transmission and Processing
    Institute for Information Industry Cooperation Project, Co-PI (Feb 10 – Dec 10)
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