The Experts below are selected from a list of 30684 Experts worldwide ranked by ideXlab platform
Michael J. Marcus - One of the best experts on this subject based on the ideXlab platform.
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itu wrc 19 Spectrum Policy results
IEEE Wireless Communications, 2019Co-Authors: Michael J. MarcusAbstract:Reports on Spectrum management Policy development and discussions that took place at the nternational Telecommunication Union’s (ITU) World Radiocommunication Conference 2019 (WRC-19) that was held in Sharm el-Sheikh, Egypt, from 28 October to 22 November 2019.
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5g and imt for 2020 and beyond Spectrum Policy and regulatory issues
IEEE Wireless Communications, 2015Co-Authors: Michael J. MarcusAbstract:A few issues ago we wrote about issues of possible millimeter- wave use in 5G mobile communications systems [1]. In this issue we are revisiting the general area because of more recent developments. The three basic developments include two major national regulatory agencies asking for and receiving comments on the approaches to be used for millimeter-wave mobile communications and Working Party 5D of the International Telecommunication Union Radiocommunication Sector (ITU-R) updating its plans and schedules for 5G development and finalizing its view of a timeline toward what is now called "IMT-2020" or "IMT for 2020 and beyond."
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Spectrum Policy issues for millimeter wave mobile communications Spectrum Policy and regulatory issues
IEEE Wireless Communications, 2014Co-Authors: Michael J. MarcusAbstract:National and international researchers and Spectrum regulators have opened the issue of mobile broadband use of Spectrum above 20 GHz, often called "millimeter wave" (mmW) because of the wavelengths involved. It is ironic that when the author first started working in Spectrum Policy in 1979, conventional wisdom was that land mobile use above even 1 GHz was impractical. Indeed, the original U.S. motivation for considering high definition television, which later evolved into digital television, was an attempt by U.S. broadcasters to derail an initiative by land mobile interests for more Spectrum sharing access to UHF-TV Spectrum because that was thought to be the only available new band which would work in land mobile applications [1].
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Spectrum Policy challenges of uav drones Spectrum Policy and regulatory issues
IEEE Wireless Communications, 2014Co-Authors: Michael J. MarcusAbstract:There is growing interest around the world in unmanned aerial vehicles (UAVs), often called "drones," for both military and civil use. In International Civil Aviation Organization (ICAO) jargon they are called remotely piloted aircraft (RPA), while in the International Telecommunication Union (ITU) they are called unmanned aeronautical systems (UAS). The civil use includes both commercial use as well as noncommercial use (e.g., a new platform for photography). Indeed, a major U.S. newspaper reported recently, The next time you go to a wedding, be sure your hair is done, your lipstick is on, and your underwear isn't sticking out of your pants. You never know if a drone is lurking in the sky about to zoom in and take your picture [1].
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growing consumer interest in jamming Spectrum Policy implications Spectrum Policy and regulatory issues
IEEE Wireless Communications, 2014Co-Authors: Michael J. MarcusAbstract:This is a magazine dedicated to communications, not electronic warfare. However, the issue of jamming is unfortunately intruding on civil communications on a growing basis. It does not take much use of your favorite search engine to discover the Internet marketing of jammers for cellular communications as well as GPS. There are even WiFi jammers and jammers for an anti-car theft system used in 37 countries called LoJack. These products need not meet any out-of-band emission limits (because they are being sold illegally anyway) and thus may well radiate in bands other than their intended targets. Thus, these commercially available jammers pose a real threat to many types of legitimate Spectrum users.
Jon M Peha - One of the best experts on this subject based on the ideXlab platform.
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sharing Spectrum through Spectrum Policy reform and cognitive radio
Proceedings of the IEEE, 2009Co-Authors: Jon M PehaAbstract:Traditionally, interference protection is guaranteed through a Policy of Spectrum licensing, whereby wireless systems get exclusive access to Spectrum. This is an effective way to prevent interference, but it leads to highly inefficient use of Spectrum. Cognitive radio along with software radio, Spectrum sensors, mesh networks, and other emerging technologies can facilitate new forms of Spectrum sharing that greatly improve spectral efficiency and alleviate scarcity, if policies are in place that support these forms of sharing. On the other hand, new technology that is inconsistent with Spectrum Policy will have little impact. This paper discusses policies that can enable or facilitate use of many Spectrum-sharing arrangements, where the arrangements are categorized as being based on coexistence or cooperation and as sharing among equals or primary-secondary sharing. A shared Spectrum band may be managed directly by the regulator, or this responsibility may be delegated in large part to a license-holder. The type of sharing arrangement and the entity that manages it have a great impact on which technical approaches are viable and effective. The most efficient and cost-effective form of Spectrum sharing will depend on the type of systems involved, where systems under current consideration are as diverse as television broadcasters, cellular carriers, public safety systems, point-to-point links, and personal and local-area networks. In addition, while cognitive radio offers Policy-makers the opportunity to improve spectral efficiency, cognitive radio also provides new challenges for Policy enforcement. A responsible regulator will not allow a device into the marketplace that might harm other systems. Thus, designers must seek innovative ways to assure regulators that new devices will comply with Policy requirements and will not cause harmful interference.
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sharing Spectrum through Spectrum Policy reform and cognitive radio Policy management by regulators and license holders is important for implementing the best means for dynamically sharing the limited and precious communications Spectrum
2009Co-Authors: Jon M PehaAbstract:Traditionally, interference protection is guaran- teed through a Policy of Spectrum licensing, whereby wireless systems get exclusive access to Spectrum. This is an effective way to prevent interference, but it leads to highly inefficient use of Spectrum. Cognitive radio along with software radio, Spectrum sensors, mesh networks, and other emerging tech- nologies can facilitate new forms of Spectrum sharing that greatly improve spectral efficiency and alleviate scarcity, if policies are in place that support these forms of sharing. On the other hand, new technology that is inconsistent with Spectrum Policy will have little impact. This paper discusses policies that can enable or facilitate use of many Spectrum-sharing arrange- ments, where the arrangements are categorized as being based on coexistence or cooperation and as sharing among equals or primary-secondary sharing. A shared Spectrum band may be managed directly by the regulator, or this responsibility may be delegated in large part to a license-holder. The type of sharing arrangement and the entity that manages it have a great impact on which technical approaches are viable and effective. The most efficient and cost-effective form of Spectrum sharing will depend on the type of systems involved, where systems under current consideration are as diverse as television broadcasters, cellular carriers, public safety systems, point-to-point links, and personal and local-area networks. In addition, while cognitive radio offers Policy-makers the opportunity to improve spectral efficiency, cognitive radio also provides new challenges for Policy enforcement. A responsible regulator will not allow a device into the marketplace that might harm other systems. Thus, designers must seek innovative ways to assure regulators that new devices will comply with Policy require- ments and will not cause harmful interference.
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emerging technology and Spectrum Policy reform
Social Science Research Network, 2007Co-Authors: Jon M PehaAbstract:Emerging technology, coupled with effective Policy reform, could lead to tremendous gains in spectral efficiency. This would alleviate the Spectrum scarcity that many nations have experienced. To be effective, reform in Spectrum Policy must fit the realistic capabilities of emerging technology, as well as applicable economic theory. This paper discusses three general approaches to reform. The first approach is increased reliance on market-based mechanisms, possibly leading to a Spectrum property system. The second approach is the expanded use of commons, or blocks of Spectrum that are available to all devices for sharing. It is argued that both approaches have significant merit that regulators should exploit. However, each of these approaches is ineffective when taken to its extreme, where one must make unfounded assumptions about technology. The third approach discussed in this paper is sharing between a primary Spectrum user that is licensed, and one or more secondary users, where secondary users may not cause harmful interference to the primary Spectrum user. Many people underestimate the potential importance of this third approach in today’s debates over Spectrum Policy reform. Emerging technology such as cognitive radio, location technology, and secure micropayment schemes will make a variety of primary-secondary sharing schemes ranging from real-time secondary markets to unlicensed opportunistic access more practical. Each of these schemes could be highly beneficial for a different set of applications and circumstances.
Yiping Xing - One of the best experts on this subject based on the ideXlab platform.
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dynamic Spectrum access with qos and interference temperature constraints
IEEE Transactions on Mobile Computing, 2007Co-Authors: Yiping Xing, R Chandramouli, Chetan Nanjunda Mathur, M A Haleem, K P SubbalakshmiAbstract:Spectrum is one of the most precious radio resources. With the increasing demand for wireless communication, efficiently using the Spectrum resource has become an essential issue. With the Federal Communications Commission's (FCC) Spectrum Policy reform, secondary Spectrum sharing has gained increasing interest. One of the Policy reforms introduces the concept of an interference temperature - the total allowable interference in a spectral band. This means that secondary users can use different transmit powers as long as the sum of these power is less than the interference threshold. In this paper, we study two problems in secondary Spectrum access with minimum signal to interference noise ratio (quality of service (QoS)) guarantee under an interference temperature constraint. First, when all the secondary links can be supported, a nonlinear optimization problem with the objective to maximize the total transmitting rate of the secondary users is formulated. The nonlinear optimization is solved efficiently using geometric programming techniques. The second problem we address is, when not all the secondary links can be supported with their QoS requirement, it is desirable to have the Spectrum access opportunity proportional to the user priority if they belong to different priority classes. In this context, we formulate an operator problem which takes the priority issues into consideration. To solve this problem, first, we propose a centralized reduced complexity search algorithm to find the optimal solution. Then, in order to solve this problem distributively, we define a secondary Spectrum sharing potential game. The Nash equilibria of this potential game are investigated. The efficiency of the Nash equilibria solutions are characterized. It is shown that distributed sequential play and an algorithm based on stochastic learning attain the equilibrium solutions. Finally, the performances are examined through simulations
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dynamic Spectrum access in open Spectrum wireless networks
IEEE Journal on Selected Areas in Communications, 2006Co-Authors: Yiping Xing, R Chandramouli, Stefan MangoldAbstract:One of the reasons for the limitation of bandwidth in current generation wireless networks is the Spectrum Policy of the Federal Communications Commission (FCC). But, with the Spectrum Policy reform, open Spectrum wireless networks, and Spectrum agile radios are set to drive next general wireless networks. In this paper, we investigate continuous-time Markov models for dynamic Spectrum access in open Spectrum wireless networks. Both queueing and no queueing cases are considered. Analytical results are derived based on the Markov models. A random access protocol is proposed that is shown to achieve airtime fairness. A distributed version of this protocol that uses only local information is also proposed based on homo egualis anthropological model. Inequality aversion by the radio systems to achieve fairness is captured by this model. These protocols are then extended to Spectrum agile radios. Extensive simulation results are presented to compare the performances of fixed versus agile radios.
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qos constrained secondary Spectrum sharing
First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks 2005. DySPAN 2005., 2005Co-Authors: Yiping Xing, R ChandramouliAbstract:Spectrum is one of the most precious radio resource. With the increasing demand for wireless communication, efficiently using the Spectrum resource has become an essential issue. With the Federal Communications Commission's (FCC) Spectrum Policy reform, secondary Spectrum sharing has become a viable option. One of the Policy reforms introduces the concept of an interference temperature-the total allowable interference in a spectral band. This means that secondary users can use different transmit powers as long as the sum of these power is less than the interference threshold. In this paper, we study the quality of service (QoS) issue in secondary Spectrum sharing subject to an interference temperature constraint. A non-linear optimization problem with the objective to maximize the total transmitting rate of the secondary users is formulated. The non-linear optimization is solved efficiently using geometric programming techniques. We also propose a joint coordination and power control (JCPC) algorithm with the objective to maximize the secondary system capacity. JCPC is a distributed algorithm and requires only local feedback information. This algorithm is proved to converge to the Nash equilibrium solution
R Chandramouli - One of the best experts on this subject based on the ideXlab platform.
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dynamic Spectrum access with qos and interference temperature constraints
IEEE Transactions on Mobile Computing, 2007Co-Authors: Yiping Xing, R Chandramouli, Chetan Nanjunda Mathur, M A Haleem, K P SubbalakshmiAbstract:Spectrum is one of the most precious radio resources. With the increasing demand for wireless communication, efficiently using the Spectrum resource has become an essential issue. With the Federal Communications Commission's (FCC) Spectrum Policy reform, secondary Spectrum sharing has gained increasing interest. One of the Policy reforms introduces the concept of an interference temperature - the total allowable interference in a spectral band. This means that secondary users can use different transmit powers as long as the sum of these power is less than the interference threshold. In this paper, we study two problems in secondary Spectrum access with minimum signal to interference noise ratio (quality of service (QoS)) guarantee under an interference temperature constraint. First, when all the secondary links can be supported, a nonlinear optimization problem with the objective to maximize the total transmitting rate of the secondary users is formulated. The nonlinear optimization is solved efficiently using geometric programming techniques. The second problem we address is, when not all the secondary links can be supported with their QoS requirement, it is desirable to have the Spectrum access opportunity proportional to the user priority if they belong to different priority classes. In this context, we formulate an operator problem which takes the priority issues into consideration. To solve this problem, first, we propose a centralized reduced complexity search algorithm to find the optimal solution. Then, in order to solve this problem distributively, we define a secondary Spectrum sharing potential game. The Nash equilibria of this potential game are investigated. The efficiency of the Nash equilibria solutions are characterized. It is shown that distributed sequential play and an algorithm based on stochastic learning attain the equilibrium solutions. Finally, the performances are examined through simulations
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dynamic Spectrum access in open Spectrum wireless networks
IEEE Journal on Selected Areas in Communications, 2006Co-Authors: Yiping Xing, R Chandramouli, Stefan MangoldAbstract:One of the reasons for the limitation of bandwidth in current generation wireless networks is the Spectrum Policy of the Federal Communications Commission (FCC). But, with the Spectrum Policy reform, open Spectrum wireless networks, and Spectrum agile radios are set to drive next general wireless networks. In this paper, we investigate continuous-time Markov models for dynamic Spectrum access in open Spectrum wireless networks. Both queueing and no queueing cases are considered. Analytical results are derived based on the Markov models. A random access protocol is proposed that is shown to achieve airtime fairness. A distributed version of this protocol that uses only local information is also proposed based on homo egualis anthropological model. Inequality aversion by the radio systems to achieve fairness is captured by this model. These protocols are then extended to Spectrum agile radios. Extensive simulation results are presented to compare the performances of fixed versus agile radios.
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qos constrained secondary Spectrum sharing
First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks 2005. DySPAN 2005., 2005Co-Authors: Yiping Xing, R ChandramouliAbstract:Spectrum is one of the most precious radio resource. With the increasing demand for wireless communication, efficiently using the Spectrum resource has become an essential issue. With the Federal Communications Commission's (FCC) Spectrum Policy reform, secondary Spectrum sharing has become a viable option. One of the Policy reforms introduces the concept of an interference temperature-the total allowable interference in a spectral band. This means that secondary users can use different transmit powers as long as the sum of these power is less than the interference threshold. In this paper, we study the quality of service (QoS) issue in secondary Spectrum sharing subject to an interference temperature constraint. A non-linear optimization problem with the objective to maximize the total transmitting rate of the secondary users is formulated. The non-linear optimization is solved efficiently using geometric programming techniques. We also propose a joint coordination and power control (JCPC) algorithm with the objective to maximize the secondary system capacity. JCPC is a distributed algorithm and requires only local feedback information. This algorithm is proved to converge to the Nash equilibrium solution
Mary Greczyn - One of the best experts on this subject based on the ideXlab platform.
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the opportunity of private sector sharing of government Spectrum Spectrum Policy and regulatory issues
IEEE Wireless Communications, 2014Co-Authors: Janice Obuchowski, Mary GreczynAbstract:As recent history has shown, the challenges of sharing government Spectrum between commercial and public users are long standing, but not intractable. A 1991 National Telecommunications and Information Administration (NTIA) study, U.S. Spectrum Management Policy: Agenda for the Future , set a road map for Spectrum auctions in the United States and elsewhere in the world. The study made other recommendations that covered "increased sharing of Spectrum between private sector and government users" and NTIA's plans to explore fees "to promote greater efficiency among federal agency Spectrum users," including through a shadow market price or as a cost recovery tool. Nearly a quarter century after the NTIA study was released, the factors behind the relative effectiveness of auctions and sharing vs. market-based fees for increasing the efficiency of Spectrum use are instructive for the next chapter of Spectrum Policy.