Unmanned Aircraft Systems

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Suzanne Odom - One of the best experts on this subject based on the ideXlab platform.

David Woolard - One of the best experts on this subject based on the ideXlab platform.

Timothy X. Brown - One of the best experts on this subject based on the ideXlab platform.

  • Secure Distribution of Spectrum Policies to Cognitive Radios in Unmanned Aircraft Systems
    AIAA Infotech@Aerospace 2010, 2010
    Co-Authors: Timothy X. Brown, Douglas Sicker
    Abstract:

    *† Unmanned Aircraft Systems compared to manned Aircraft have an inherently greater need for wireless communication and associated spectrum to command and control the Aircraft and its payload. Cognitive radios have the potential to increase the amount of available spectrum and improve spectrum management for wireless communication in Unmanned Aircraft Systems. Spectrum access is dynamically managed through spectrum policies. This paper describes a model for secure distribution of these policies to the Unmanned Aircraft system ground control stations and analyzes its performance. It is shown that existing security mechanisms can be used to provide secure distribution, that the performance requirements are modest, and the system is robust to outages and denial of service attacks. Nomenclature pi = ith policy si = size of policy pi ti = time that policy pi is valid R = data rate N = number of entities accessing a policy I. Overview

  • airborne communication networks for small Unmanned Aircraft Systems
    Proceedings of the IEEE, 2008
    Co-Authors: Eric W. Frew, Timothy X. Brown
    Abstract:

    This paper explores the role of meshed airborne communication networks in the operational performance of small Unmanned Aircraft Systems. Small Unmanned Aircraft Systems have the potential to create new applications and markets in civil domains, enable many disruptive technologies, and put considerable stress on air traffic control Systems. We argue that of the existing networked communication architectures, only meshed ad hoc networking can meet the communication demands for the large number of small Aircraft expected to be deployed in future. Experimental results using the heterogeneous Unmanned Aircraft system are presented to show that meshed airborne communication is feasible, that it extends the operational envelope of small Unmanned Aircraft at the expense of increased communication variability, and that net-centric operation of multiple cooperating Aircraft is possible. Additionally, the ability of airborne networks of small Unmanned Aircraft to exploit controlled mobility to improve performance is discussed.

  • Networking Issues for Small Unmanned Aircraft Systems
    Journal of Intelligent and Robotic Systems, 2008
    Co-Authors: Eric W. Frew, Timothy X. Brown
    Abstract:

    This paper explores networking issues that arise as a result of the operational requirements of future applications of small Unmanned Aircraft Systems. Small Unmanned Aircraft Systems have the potential to create new applications and markets in civil domains, enable many disruptive technologies, and put considerable stress on air traffic control Systems. The operational requirements lead to networking requirements that are mapped to three different conceptual axes that include network connectivity, data delivery, and service discovery. The location of small UAS networking requirements and limitations along these axes has implications on the networking architectures that should be deployed. The delay-tolerant mobile ad-hoc network architecture offers the best option in terms of flexibility, reliability, robustness, and performance compared to other possibilities. This network architecture also provides the opportunity to exploit controlled mobility to improve performance when the network becomes stressed or fractured.

Sang Hyun Kim - One of the best experts on this subject based on the ideXlab platform.

Luc Rolland - One of the best experts on this subject based on the ideXlab platform.

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