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- The demand for wireless broadband is growing across the world. Access to high-rate wireless communication is becoming critical to the operation of any modern society. The increasing demand for spectrum requires novel solutions, capable of addressing the high-density and high-mobility expected of future wireless services.
- In this project, we address the global need for ubiquitous wireless broadband by enabling new frequencies, specifically, the millimeter wave bands to be used in future networks. We will develop a novel agile architecture capable of supporting adaptation to varying network conditions to enable efficient and seamless network operation in highly-dynamic environments characterized by high density and mobility of wireless devices.
- This architecture could provide low-cost broadband access nationwide by enabling the widespread use of millimeter wave networks without expensive infrastructure. The knowledge developed in this project will be integrated into course offerings and undergraduate education. All educational materials resulting from the proposed work will be widely shared with other universities.
- We will explore the potential offered by millimeter wave bands as a solution to the increasing traffic demand (network density) and increasing mobility of wireless services. To enable a network-level adaptation, we will use the tools of software-defined networking (SDN). An SDN architecture allows controllers to run applications, interface with database and cloud-based servers, and adapt the radios to changing channel conditions.
- The level of flexibility and adaptability required for millimeter wave networks make SDN a natural fit. We will address the theoretical and experimental issues that are impeding the deployment of millimeter wave wireless broadband systems. Specifically, we will focus on the interplay between network-level optimization and physical layer communication, channel sounding, and control. The optimization framework is based on programmability, which will be enabled by the SDN framework developed in the project.
- The SDN will interface with a cloud-based Multi-Layer Radio Environment Map (ML-REM) that builds upon the database-enabled side information techniques pioneered for the 3.5 GHz band. Over-the-air data obtained through propagation measurements will be used to construct the ML-REM. We will experimentally test the research on a joint SDN and software defined radio (SDR) testbed, with the experimental results being integrated into theoretical models for continuous improvement and testing.
- The goals of the project are as follows:
- To develop a software defined network (SDN) architecture that allows network-wide adaptation and easy reprogrammability. This approach hinges on the fact that standard cellular deployments use a conservative approach in resource allocation, which simplifies design at the cost of a lower efficiency in terms of resource utilization. On the other hand, the challenging goals of 5G demand the ability to adapt the network behavior to local network conditions in real time to optimize spectral efficiency.
- To establish the protocols and abstraction layers needed to generate high-performance and flexible spectrum sharing mm-wave networks.
- To design energy efficient beam alignment algorithms and control signaling techniques in mobile mmwave networks, with the goal of minimizing the communication overhead while maximizing the communication performance. The design of multiple access point coordination at the network level to support multiple users with minimal control overhead, and to achieve diversity in fast-varying environments, potentially using mm-wave backhaul.
- The design of a cloud-based “multi-layer radio environment map” (ML-REM) database, to allow a rich set of real-time estimates and average statistics of environmental parameters for location-based real-time control of communication parameters.
- The acquisition of mm-wave propagation measurements in several locations and propagation models to serve as input conditions for the ML-REM database. Environments considered will be indoor and outdoor, clear line-of-sight, foliage and other clutter, as well as limited non-line-of-sight.
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