Telecommunications Research and Engineering at the Institute for Telecommunication Sciences of the Department of Commerce Meeting the Nation's Telecommunications Needs (2015) / Chapter Skim
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4 National Telecommunication Research Needs and the Future Role of the Boulder Telecommunications Laboratories
4 National Telecommunication Research Needs and the Future Role of the Boulder Telecommunications Laboratories
Pages 27-42
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From page 27... ...
2 Note that when spectrum availability is lacking, cellular networks compensate for this by deploying more infrastructure (frequency reuse) to 1 Cisco, "Cisco Visual Networking Index: Global Mobile Data Traffic Forecast Update 2014-2019 White Paper," February 3, 2015, http://www.cisco.com/c/en/us/solutions/collateral/service-provider/visual-networkingindex-vni/white_paper_c11-520862.html.
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From page 28... ...
The Boulder telecommunications laboratories are among the few government facilities with the necessary skills and specialized equipment capable of performing the measurement and analysis needed for transitioning spectrum from exclusive federal use to shared commercial use. They have extensive experience in propagation and interference measurements and analyses and better access to federal facilities (especially classified or controlled facilities)
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9 ITS and CTL have developed initial research plans for the 5 GHz band, but a significant investment and focus on hiring the appropriate talent will be needed for the Boulder telecommunications laboratories to provide needed technical knowledge in a timely manner.
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Examples of High-Profile Failures in Spectrum Allocation The FCC Technological Advisory Council's white paper on spectrum efficiency metrics1 summarized nine high-profile failures, including the following: • The prospect of overload interference to legacy Satellite Digital Audio Radio Service (SDARS, aka SiriusXM) receivers from mobile devices in the Wireless Communications Service (WCS)
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From page 31... ...
• Receiver performance relative to adjacent channel and intermodulation characteristics was a major element in the issue of re-banding the 800 MHz spectrum to avoid interference between Nextel and public safety operations on interleaved channels. • LightSquared's proposed deployment of ancillary terrestrial component base stations as part of a hybrid terrestrial–satellite service has raised significant concerns about potential harmful interference to the GPS service operating in the upper-adjacent spectrum due to the potential for receiver overload -- that is, power transmitted in LightSquared's licensed frequencies causing degradation of GPS devices that did not filter out this energy sufficiently well.
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Communications Technology Laboratory (CTL) , National Telecommunications and Information Administration's (NTIA's)
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11 Federal Communications Commission, Notice of Inquiry, FCC 14-154, In the Matter of: Use of Spectrum Bands Above 24 GHz For Mobile Radio Services; Amendment of the Commission's Rules Regarding the 37.0-38.6 GHz and 38.6-40.0 GHz Bands; Implementation of Section 309(j) of the Communications Act -- Competitive Bidding, 37.0-38.6 GHz and 38.6-40.0 GHz Bands; Petition for Rulemaking of the Fixed Wireless Communications Coalition to Create Service Rules for the 42-43.5 GHz Band, October 17, 2014, https://apps.fcc.gov/edocs_public/attachmatch/FCC-14-154A1.pdf.
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From page 34... ...
In the future, spectrum sharing, new cellular standards, and the anticipated proliferation of new devices will substantially complicate interference environments. Examples of research challenges include the following: 12 Interference limits policies are methods to describe the environment in which a receiver must operate without necessarily specifying receiver performance.
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From page 35... ...
The committee sees a logical role for the Boulder telecommunications laboratories to engage in the area of spectrum monitoring and enforcement, such as defining methods of measurement, assessment, and thresholds. New Spectrum-Efficient Technologies Emerging technologies that have particular relevance to the mission of ITS and CTL include the following: 14 The "tragedy of the commons" comes from the practice of having a central commons or shared property at the center of many towns.
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From page 36... ...
extending the spectrum efficiency (i.e., the number of bits per Hertz being transmitted and received) ; • Channel bonding and, especially non-contiguous channel bonding, to enable very wide spectrum channels to be assigned for very-high-speed broadband deployments; • Dynamic spectrum sharing, which is being explored in commercial, government and mixed commercial/government environments, increasing the need for protocols that reduce or eliminate adjacent channel interference and imposing significantly greater sophistication in spectrum management techniques; and • Full duplex bi-directional operation on a single frequency channel -- a technology that is just emerging from the university research environment for which the potential applications and performance improvements are still poorly understood.
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From page 37... ...
Wireless Communications One of the biggest technical challenges with cellular and Wi-Fi-equipped devices (such as smartphones, tablets, and laptops) is battery life, which is even more of a challenge with IoT devices that have much smaller batteries and are expected to operate for years.
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A research agenda should consider the most efficient use of the laboratories' resources and develop an effective organizational structure and funding strategy to ensure research goals are met and resources are effectively used. RECOMMENDATION: The Boulder telecommunications laboratories should expand their visible leadership role by providing technical expertise for agencies and policy makers and by providing objective scientific expertise.
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NATIONAL TELECOMMUNICATION RESEARCH NEEDS AND THE FUTURE ROLE OF THE LABORATORIES 39 RECOMMENDATION: The Boulder telecommunications laboratories should fully engage in the current and emerging work in the IEEE 802 LAN/MAN Standards Committee, the 3rd Generation Partnership Project, and the Internet Engineering Task Force. This must be a long-term commitment, because the time constant for standards evolution is on the order of 3 to 10 years.
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From page 41... ...
Appendixes
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