Semi Dynamic Parameter Tuning for Optimized Opportunistic Spectrum Access

Alaya-Feki, Afef Ben Hadj; Sayraç, Berna; Cornec, A. Le; Moulines, Éric

doi:10.1109/vetecf.2008.265

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…Within the Cognitive Radio (CR) context [4], fixed spectrum allocation policy could be replaced by innovative forms of dynamic use, referred to as Dynamic Spectrum Access (DSA) [5]. Among the DSA options it is of great interest the so-called Hierarchical Access Model (HAM) [6], according to which an unlicensed secondary CR user (SU) can access the spectrum licensed to a primary user (PU), provided that harmful interference is avoided. In the literature, mainly two HAM approaches have been proposed [7]: "Spectrum Underlay", also called horizontal sharing since based on spreading SU signals, for example by means of Ultra Wide Band (UWB) techniques; "Spectrum Overlay", also known as Opportunistic Spectrum Access (OSA).…”

Section: Introductionmentioning

confidence: 99%

An always available control channel for cooperative sensing in cognitive radio networks

Petracca

Pomposini

Mazzenga

et al. 2010

2010 IFIP Wireless Days

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In the Cognitive Radio (CR) framework, the Opportunistic Spectrum Access (OSA) is a promising solution to increase spectral efficiency. However in an OSA network secondary unlicensed cognitive nodes have to agree on which spectral resources they are allowed to use without compromising performance of primary licensed users. This requires a common control channel for sharing spectrum sensing information. Among the ways to realize it, the utilization of Ultra-wideband (UWB) techniques has been proposed in the literature. In this paper we face the problem of dimensioning an "always on" underlay UWB signalling network for sensing information exchange among secondary CR nodes avoiding harmful interference to primary users. To this aim, we analyse the tradeoff between the connectivity degree of a multi-hop underlay signalling network, related to the bit-rate of the control channel, and its coexistence with primary licensed systems.

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Section: Introductionmentioning

confidence: 99%

An always available control channel for cooperative sensing in cognitive radio networks

Petracca

Pomposini

Mazzenga

et al. 2010

2010 IFIP Wireless Days

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“…In this case, the agent only needs to determine the best action, i.e., pull the arm. MAB has been used in [100] to strike a balance between the exploitation of the environment and the exploration of the accumulated knowledge for opportunistic spectrum access. MAB can be further extended to multi-player MAB (MP-MAB), where the reward of a player depends on the decisions of other players.…”

Section: B Intelligent Actionmentioning

confidence: 99%

20 Years of Evolution From Cognitive to Intelligent Communications

Qin

Zhou

Zhang

et al. 2020

IEEE Trans. Cogn. Commun. Netw.

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It has been 20 years since the concept of cognitive radio (CR) was proposed, which is an efficient approach to provide more access opportunities to connect massive wireless devices. To improve the spectrum efficiency, CR enables unlicensed usage of licensed spectrum resources. It has been regarded as the key enabler for intelligent communications. In this article, we will provide an overview on the intelligent communication in the past two decades to illustrate the revolution of its capability from cognition to artificial intelligence (AI). Particularly, this article starts from a comprehensive review of typical spectrum sensing and sharing, followed by the recent achievements on the AIenabled intelligent radio. Moreover, research challenges in the future intelligent communications will be discussed to show a path to the real deployment of intelligent radio. After witnessing the glorious developments of CR in the past 20 years, we try to provide readers a clear picture on how intelligent radio could be further developed to smartly utilize the limited spectrum resources as well as to optimally configure wireless devices in the future communication systems.

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“…In the case of CR, the present fixed spectrum allocation policy could be replaced by innovative forms of dynamic use, referred to as Dynamic Spectrum Access [6]. Among the DSA options shown in Figure 1, it is of great interest the so-called Hierarchical Access model (HAM) [7], according to which an unlicensed CR secondary user can access the spectrum licensed to a primary user, provided that harmful interference is avoided. In the literature, mainly two HAM approaches have been proposed [8].…”

Section: Dynamic Spectrum Access Techniquesmentioning

confidence: 99%

Dynamic Spectrum Access Techniques for Preservation of Environment and Cultural Heritage

Petracca

Pomposini

Vatalaro

2011

2011 IEEE 20th International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises

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In recent years, Wireless Sensor Networks (WSNs) have been largely deployed for various applications. Among them, monitoring in unlicensed frequency bands of the environment and historical sites assumes particular relevance. However, these bands are becoming more and more overcrowded due to the fast growth of wireless services relying on them. A possible solution to overcome this problem is offered by the so-called Cognitive Radio (CR) technologies. According to the Dynamic Spectrum Access (DSA) paradigm, nodes of one WSN can act as Secondary Users (SUs) accessing the unused portion of one licensed spectrum band. This is admitted provided that harmful interference to the licensees, namely the Primary Users (PUs), is avoided. In this paper, we describe how WSNs using DSA can be employed for applications of environment and cultural heritage monitoring. We show by system simulation that underlay CR techniques are well-suited to this kind of applications, allowing sensor nodes to continuously perform sensing data exchange while coexisting with primary systems.

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Semi Dynamic Parameter Tuning for Optimized Opportunistic Spectrum Access

Cited by 6 publications

References 16 publications

An always available control channel for cooperative sensing in cognitive radio networks

An always available control channel for cooperative sensing in cognitive radio networks

20 Years of Evolution From Cognitive to Intelligent Communications

Dynamic Spectrum Access Techniques for Preservation of Environment and Cultural Heritage

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