Parametric Adaptive Spectrum Sensing Framework for Dynamic Spectrum Access Networks

Datla, Dinesh; Rajbanshi, Rakesh; Wyglinski, Alexander M.; Minden, Gary J.

doi:10.1109/dyspan.2007.70

Cited by 65 publications

(38 citation statements)

References 4 publications

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“…Intuitively, a channel with larger availability will produce more usable spectrum using opportunistic access, which has been widely used to evaluate opportunistic access [8,5]. Our results in Figure 9(c) show that such claim can be problematic.…”

Section: Available Vs Extracted Spectrummentioning

confidence: 69%

On the feasibility of effective opportunistic spectrum access

Kone

Yang

et al. 2010

Proceedings of the 10th ACM SIGCOMM Conference on Internet Measurement

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Dynamic spectrum access networks are designed to allow today's bandwidth hungry "secondary devices" to share spectrum allocated to legacy devices, or "primary users." The success of this wireless communication model relies on the availability of unused spectrum, and the ability of secondary devices to utilize spectrum without disrupting transmissions of primary users. While recent measurement studies have shown that there is sufficient underutilized spectrum available, little is known about whether secondary devices can efficiently make use of available spectrum while minimizing disruptions to primary users.In this paper, we present the first comprehensive study on the presence of "usable" spectrum in opportunistic spectrum access systems, and whether sufficient spectrum can be extracted by secondary devices to support traditional networking applications. We use for our study fine-grain usage traces of a wide spectrum range (20MHz-6GHz) taken at 4 locations in Germany, the Netherlands, and Santa Barbara, California. Our study shows that on average, 54% of spectrum is never used and 26% is only partially used. Surprisingly, in this 26% of partially used spectrum, secondary devices can utilize very little spectrum using conservative access policies to minimize interference with primary users. Even assuming an optimal access scheme and extensive statistical knowledge of primary user access patterns, a user can only extract between 20-30% of the total available spectrum. To provide better spectrum availability, we propose frequency bundling, where secondary devices build reliable channels by combining multiple unreliable frequencies into virtual frequency bundles. Analyzing our traces, we find that there is little correlation of spectrum availability across channels, and that bundling random channels together can provide sustained periods of reliable transmission with only short interruptions.

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Section: Available Vs Extracted Spectrummentioning

confidence: 69%

On the feasibility of effective opportunistic spectrum access

Kone

Yang

et al. 2010

Proceedings of the 10th ACM SIGCOMM Conference on Internet Measurement

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“…As our scheme mainly concentrates on regulating the PU's resource occupation pattern, and improving the sensing efficiency of the SU, it creates neither restrictions nor any influence on the PU's traffic profile, such as power of transmission, preambles, midambles and pilot patterns. Therefore, almost all existing spectrum sensing algorithms [29]- [33] can be adopted in our scheme without altering their implementation or their properties. The major contributions of this paper are as follows.…”

Section: Related Workmentioning

confidence: 99%

Improving the Cognitive Access Efficiency by Non-Uniform Bandwidth Allocation

Huang

Ephremides

Yuan

2015

IEEE Trans. Wireless Commun.

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Abstract-In cognitive communication, dynamic sensing and opportunistic access enable secondary users to recognize and utilize the white spaces of the licensed bandwidth. Most present efforts focus on designing smarter channel sensing and access algorithms for secondary users, with the aim of optimizing the overall throughput and bandwidth utilization efficiency, under the condition of not interfering with primary users' communication. However, as the transmissions of the primary users are inherently random and unpredictable, sensing and sharing spectrum with the primary users inevitably make the cognitive process of the secondary users complex and ineffective. In this paper, a non-uniform bandwidth allocation scheme is proposed that regularizes the primary users' bandwidth occupancy pattern. The regularization is not designed to reshape the primary users's traffic, but to improve the sensing efficiency and throughput of the secondary users by optimizing the spectrum allocation. After the description of the new allocation scheme, we demonstrate its performance by theoretic analysis. Then we verify the validity of the non-uniform scheme with numerical simulations under non-fading and fading situations respectively. Through comparisons with the conventional uniform bandwidth allocation scheme, the nonuniform one shows higher sensing efficiency and better spectrum utilization due to lower sensing cost and reduced bandwidth loss.

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“…The CTMC model has widely been used in the study of various DSA/CR techniques such as MAC protocols for spectrum sharing [213,214], MAC-layer sensing schemes [215][216][217] and adaptive spectrum sensing solutions [218] as well as to analyze the sensing-throughput trade-off [219,220] and the performance of DSA/CR sensor networks [221].…”

Section: Previous Work Based On Continuous-time Markov Chainsmentioning

confidence: 99%

Spectrum Usage Models for the Analysis, Design and Simulation of Cognitive Radio Networks

López-Benítez

Casadevall

2012

Lecture Notes in Electrical Engineering

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ADVERTIMENT. La consulta d'aquesta tesi queda condicionada a l'acceptació de les següents condicions d'ús: La difusió d'aquesta tesi per mitjà del servei TDX (www.tesisenxarxa.net) ha estat autoritzada pels titulars dels drets de propietat intel·lectual únicament per a usos privats emmarcats en activitats d'investigació i docència. No s'autoritza la seva reproducció amb finalitats de lucre ni la seva difusió i posada a disposició des d'un lloc aliè al servei TDX. No s'autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant al resum de presentació de la tesi com als seus continguts. En la utilització o cita de parts de la tesi és obligat indicar el nom de la persona autora.ADVERTENCIA. La consulta de esta tesis queda condicionada a la aceptación de las siguientes condiciones de uso: La difusión de esta tesis por medio del servicio TDR (www.tesisenred.net) ha sido autorizada por los titulares de los derechos de propiedad intelectual únicamente para usos privados enmarcados en actividades de investigación y docencia. No se autoriza su reproducción con finalidades de lucro ni su difusión y puesta a disposición desde un sitio ajeno al servicio TDR. No se autoriza la presentación de su contenido en una ventana o marco ajeno a TDR (framing). Esta reserva de derechos afecta tanto al resumen de presentación de la tesis como a sus contenidos. En la utilización o cita de partes de la tesis es obligado indicar el nombre de la persona autora. WARNING.On having consulted this thesis you're accepting the following use conditions: Spreading this thesis by the TDX (www.tesisenxarxa.net) service has been authorized by the titular of the intellectual property rights only for private uses placed in investigation and teaching activities. Reproduction with lucrative aims is not authorized neither its spreading and availability from a site foreign to the TDX service. Introducing its content in a window or frame foreign to the TDX service is not authorized (framing). This rights affect to the presentation summary of the thesis as well as to its contents. In the using or citation of parts of the thesis it's obliged to indicate the name of the author Essentially, all models are wrong, but some are useful.George E. P. BoxTo my beloved family for their unconditional love and support.A mi querida familia por su cariño y apoyo incondicionales. 0 ABSTRACTThe owned spectrum allocation policy, in use since the early days of modern radio communications, has been proven to effectively control interference among radio communication systems and simplify the design of hardware for use at a known and fixed range of frequencies. However, the overwhelming proliferation of new operators, innovative services and wireless technologies during the last years has resulted, under this static regulatory regime, in the depletion of all spectrum bands with commercially attractive radio propagation characteristics. The vast majority of spectrum regarded as usable has already been allocated, thus...

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Parametric Adaptive Spectrum Sensing Framework for Dynamic Spectrum Access Networks

Cited by 65 publications

References 4 publications

On the feasibility of effective opportunistic spectrum access

On the feasibility of effective opportunistic spectrum access

Improving the Cognitive Access Efficiency by Non-Uniform Bandwidth Allocation

Spectrum Usage Models for the Analysis, Design and Simulation of Cognitive Radio Networks

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