Implementing Dynamic Spectrum Access Technology to Facilitate Sharing a Joint GovernmentIndustry Eff

1
Implementing Dynamic Spectrum Access Technology
to Facilitate Sharing a Joint Government-Industry
Effort
Defense Spectrum Summit 2007 Arlington,
VA December 13, 2007

• Edward Drocella
• Office of Spectrum Management
• National Telecommunications and Information
  Administration
• U.S. Department of Commerce

2
Overview

• Background
• What is Dynamic Spectrum Access (DSA) Technology
• DSA Analysis Challenges
• DSA Measurement Challenges
• Presidential Spectrum Policy Initiative
  Engineering and Technology Assessments
• Summary

3
Background

• The long standing practice of spectrum management
  is to respect the rights of incumbent users.
• New technologies are being developed to access
  spectrum while not causing interference to the
  incumbent users.
• To accommodate these new technologies while
  protecting the incumbents it is necessary to
  ensure that the interference mitigation
  techniques are well understood.

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What is DSA Technology?

• DSA technology allows a device to
• - evaluate its radio frequency environment using
  spectrum sensing, geo-location, or a combination
  of spectrum sensing and geo-location techniques
• - determine which frequencies are available for
  use on a non-interference basis
• - reconfigure itself to operate on the
  identified frequencies.

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DSA Analysis Challenges

• Defining DSA device usage (e.g., device density).
• Defining the characteristics, operations, and
  interference criteria of current and future
  authorized systems.
• Defining interference scenarios to develop DSA
  parameters (e.g., detection thresholds, detection
  move times) based on aggregate interference to
  the authorized systems.

6
DSA Measurement Challenges

• Measurements to verify that the concept of DSA
  actually works
• - laboratory testing and
• - field testing.
• Compliance measurement procedures
• - defining test signals
• - measuring DSA response to test signals and
• - defining pass/fail criteria.

7
Presidential Spectrum Policy Initiative
Engineering Analysis and Technology Assessments

• The Presidential Spectrum Policy Initiative
  addresses implementing new technologies such as
  DSA under the following projects
• - Spectrum Engineering Best Practices Handbook
• - Spectrum Sharing Innovation Test-Bed

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Spectrum Engineering Best Practices Handbook

• Develop a handbook documenting the best practices
  in spectrum engineering for use by regulators,
  technology developers, manufacturers, and service
  providers.
• The Best Practices Handbook will bring together a
  common set of approaches for conducting
  engineering analyses and will develop a common
  set of criteria for performing technical studies
  to evaluate emerging technologies.
• The Best Practices Handbook will guide the
  technical discourse on policy issues involving
  the potential interference impact of one system
  or technology on another.

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Spectrum Innovation Sharing Test-Bed

• NTIA, the FCC, and federal agencies are to
  develop a plan to increase sharing of spectrum
  between federal and non-federal users.
• NTIA and the FCC are to establish a spectrum
  sharing test-bed where federal and non-federal
  users can study the feasibility of increasing the
  efficient use of the spectrum.
• As part of establishing the spectrum sharing
  test-bed NTIA and the FCC are each to identify 10
  MHz of spectrum for shared federal and
  non-federal use from bands allocated on an
  exclusive or shared basis.
• The spectrum sharing test-bed will provide a
  means for evaluating emerging technologies and
  expanded services as well as provide
  opportunities to develop processes for
  intra-government cooperation and spectrum
  sharing.
• NTIA and FCC have issued a request for public
  comment to address implementation of the test-bed
  and are finalizing their proposals.

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Summary

• The successful implementation of DSA technologies
  can enable sharing and increase spectrum
  efficiency.
• The steps used to implement DSA analysis,
  laboratory testing and field testing are
  necessary elements in successfully implementing
  DSA technologies.
• To successfully implement DSA will require a
  great deal of cooperation between the regulatory
  agencies, incumbent users, equipment
  manufacturers, and the equipment certification
  laboratories.