NIST Standards EducationDynamic Spectrum Access Standards

Martin BH Weiss

School of Information Sciences

University of Pittsburgh

mbw@pitt.edu

Overview

• Overview of DSA standardization

• Introduction to the IEEE P1900 family of standards

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Learning Objectives

• After completing this module, you should be able to• Explain why standards are sometimes developed in

advance of the market• Describe the role of other international standards

setting bodies in DSA• Describe the IEEE P1900 committee’s approach to

standards• Describe the principal features of P1900.1, P1900.2,

P1900.4 and P1900.5

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Some DSA standards requirements

• Sensing-based approaches• Communication standards for cooperating

radios/sensors• Measurement standards

• Database approaches• Communication standards• Database API standards

• Cooperative approaches• Communication standards• Protocol standards for negotiation

• Behavioral norms for DSA system participants

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Why study DSA standards?

• An example of standardization activities that lead the market

• The use of standards to reduce uncertainties for equipment manufacturers, service providers, regulators and end users

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Some DSA standardization activities

• European Telecommunications Standards Institute (ETSI)• Reconfigurable Radio Systems (RRS) technical

committee• Cognitive pilot channel

• IETF• White spaces database discovery• PAWS – Protocol to Access White Spaces

• IEEE• Committee P1900• Committee 802

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DSA standardization timeline

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P1900 Standards

• Generally oriented toward different DSA approaches

• P1900.1 and .2 are more generic

• New DSA approaches would imply different P1900 standards

• P1900.1 – Definitions

• P1900.2 – Analysis Techniques

• P1900.4 – Heterogeneous Networks (HetNets)

• P1900.5 – Language and Architecture for Policy Based DSA

• P1900.6 – Sensing Interfaces

• P1900.7 – Whitespaces PHY and MAC

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P1900.1 Definitions

• Originally finalized in 2008; updated to P1900.1a in 2012

• The purpose is to have a common language for describing DSA systems, components, relationships, etc.

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P1900.2

• Managing interference is critical to DSA

• P1900.2 provides guidelines on how to perform an interference analysis

• Regulators value a standardized approach to computing interference

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P1900.2 Types of interference

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P1900.2 Computing interference

• Interference is highly situation-specific, so scenarios are needed for context

• Note that this standard is geared to producing reports

• The “Clauses” refer to the appropriate sections of the P1900.2 standard

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P1900.4 – Heterogeneous Networks

• Heterogeneous Networks (HetNets) describe sharing situations when systems employing different technologies (e.g., air interfaces) share spectrum

• Defines an architecture, entities and interfaces to facilitate this sharing

• HetNets are an important emerging application, for example, in the deployment of femtocells

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P1900.4 entities and relationships

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P1900.5 Policy-based DSA

• Unlike P1900.4, which is oriented toward decentralized decisionmaking, policy-based DSA is designed to ensure that sharing takes place according to a pre-established policy framework

• The policy framework can vary according to sharing situation

• Policy frameworks can be established by license holders, regulatory bodies, industry associations, etc.

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P1900.5 System context

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Summary and conclusion

• Spectrum sharing is an emerging requirement in wireless systems

• Standards are being developed to facilitate the emergence of systems that use spectrum sharing technologies

• Numerous approaches exist to enabling spectrum sharing

• In the IEEE, Committee P1900 has established different standards for each approach to sharing

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