Project Overview:

  • Principal Investigators: Prof. Sanjib Sur; Prof. Srihari Nelakuditi; Prof. Guoan Wang

  • Team:
    • Graduate Students: Moh Sabbir Saadat; Jinqun Ge; Aakriti Adhikari;

    • Undergraduate Students: Austin Hetherington; Timothy Dayne Hooks;

  • Support: NSF CNS Core Program: NSF #1910853
    CNS Core: Small: Software-Hardware Reconfigurable Systems for Mobile Millimeter-Wave Networks

  • Synopsis:

    Millimeter-wave is a core technology for next-generation wireless and cellular networks (5G and beyond). Networks using millimeter-wave technologies are expected to satiate the rapidly growing customer appetite for mobile data and to meet the stringent throughput, latency, and reliability requirements of emerging applications, such as immersive virtual and mixed reality, tactile internet, vehicular communications, and autonomous vehicles safety. However, high directionality, high channel dynamics, and sensitivity to blockages render state-of-the-art millimeter-wave technologies unsuitable for low-latency, high performance, and ultra-reliable applications. This research project focuses on designing software-hardware reconfigurable systems to address the key challenges and improve the performance, availability, and reliability of mobile millimeter-wave networks. This project will impact the broader population positively because it yields near-term benefits in 5G infrastructure and paves the way for long-term millimeter-wave research. Furthermore, this project will engage in outreach activities and involve a diverse set of students, particularly, women and minorities, leveraging the experimental nature of the research on next-generation wireless and cellular networks.

    The project addresses the key challenges by executing three thrusts: (1) MilliNet: To overcome high signal attenuation, millimeter-wave radios must focus their power via highly directional, electronically steerable beams. But, aligning the beams and maintaining the link between devices during obstruction and mobility are the fundamental barriers toward reliable connection. MilliNet, a faster beam alignment protocol, draws on ideas from the sparse channel recovery, allowing the radios to quickly discern the best physical millimeter-wave paths even under thousands of beams and picocell choices. (2) ReconMilli: To achieve spectrum flexibility, next-generation radios must be able to operate over a wide range of the spectrum, from micro-wave to millimeter-wave. But the fundamental challenge is that physical space on mobile devices is limited. ReconMilli, a reconfigurable antenna design, joins multiple millimeter-wave antennas physically into a micro-wave antenna, but splits it, when needed, into multiple millimeter-wave antennas; thus, achieving spectrum flexibility and saving physical space. (3) LiMesh: To make the deployment and maintenance of a 5G picocell mesh easy, mobile operators will use multi-Gbps fixed millimeter-wave links. Yet, disruptions in the wireless mesh are common; but, more importantly, such disruptions are catastrophic for ultra-reliable connectivity. LiMesh, an ultra-reliable picocell mesh design, leverages the fixed geometrical arrangement of the directional links to infer disruptions using a space-time failure correlation metric proactively. The research project will design, build, and empirically validate the proposed systems in millimeter-wave wireless test-beds.

Publications and Other Products:

  • A Case for Temperature-Aware Scheduler for Millimeter-Wave Devices and Networks
    Moh Sabbir Saadat, Sanjib Sur, Srihari Nelakuditi
    ICNP'20 The 28th IEEE International Conference on Network Protocols, Madrid, Spain, October 2020
    [ Paper ]

  • Poster: Bringing Temperature-Awareness to Millimeter-Wave Networks
    Moh Sabbir Saadat, Sanjib Sur, Srihari Nelakuditi
    MobiCom'20 ACM International Conference on Mobile Computing and Networking, London, UK, September 2020
    [ Paper ]

  • CmWave to MmWave Reconfigurable Antenna for 5G Applications
    Jinqun Ge, Guoan Wang
    AP-S'20 IEEE Antenna and Propagation Symposium, Quebec, Canada, July 2020

  • US Patent Application 63/055,386, Heat Dissipation for Millimeter-Wave Devices with Antenna Switching,
    Sanjib Sur, Moh Sabbir Saadat, Srihari Nelakuditi, Filed on July 2020

  • US Patent Application 63/025,333, Methods and Integrated Structures of Heat Dissipation for Microwave Antennas,
    Guoan Wang, Jinqun Ge, Sanjib Sur, Srihari Nelakuditi, Filed on May 2020

  • US Patent Application 62/924,436, A Reconfigurable Antenna Design for Centimeter-Wave and Millimeter-Wave,
    Sanjib Sur, Guoan Wang, Srihari Nelakuditi, Filed on Oct. 2019

Education, Outreach and Other Broader Impacts:

  • PI Sur served as a co-chair for ACM mmNets 2020, held in conjunction with ACM MobiCom.

  • PI Sur participated as the head judge for Math and CS competition in UofSC Science and Engineering Fair.

  • PI Sur developed and taught a Graduate IoT class with 5G Millimeter Wave: Wireless and Mobile Systems for the IoT.

  • We have recruited an URM undergraduate researcher to participate in the project during Summer'20. We have also recruited another undergraduate researcher in Fall'20 through REU. Our team involves female and URM students.

Open-Source Software and Data Release:

  • Thermal characterization data from 60 GHz millimeter-wave devices is available now for downloading! This is the data base for our Aquilo project (paper in ICNP'20, poster in MobiCom'20). By downloading the data, you accept the following terms:
    • The data is for non-commercial use only (see details in the license file).

    • For any reuse or distribution, you must make clear to others the license terms of this work.

    • If you use it in your research work, please acknowledge the source and cite the appropriate paper(s) in the publication list above.
      Accept and download.

  • Temperature-aware multi antenna scheduler code: Coming soon.

  • ANSYS HFSS simulation for 28 GHz to 6 GHz reconfigurable antenna: Coming soon.