Control information exchange through UWB in cognitive radio networks

Masri, Aladdin; Chiasserini, Carla-Fabiana; Perotti, Alberto

doi:10.1109/iswpc.2010.5483805

Cited by 17 publications

(10 citation statements)

References 8 publications

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“…The key enabling underlay paradigm is that the interference A new transmission model in cognitive radio created by the secondary transmitter at the primary user's receiver should be less than certain limit set by primary user. Thus, in underlay the transmission power of the secondary user is limited and hence transmission is limited for short area [10].…”

Section: Underlay and Overlay : An Overviewmentioning

confidence: 99%

A new transmission model in cognitive radio based on cyclic generalized polynomial codes for bandwidth reduction

Azam

Shah

Andrade

2014

Discrete Math. Algorithm. Appl.

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The frequency spectrums are inefficiently utilized and cognitive radio has been proposed for full utilization of these spectrums. The central idea of cognitive radio is to allow the secondary user to use the spectrum concurrently with the primary user with the compulsion of minimum interference. However, designing a model with minimum interference is a challenging task. In this paper, a transmission model based on cyclic generalized polynomial codes discussed in [2] and [15], is proposed for the improvement in utilization of spectrum. The proposed model assures a non interference data transmission of the primary and secondary users. Furthermore, analytical results are presented to show that the proposed model utilizes spectrum more efficiently as compared to traditional models.

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Section: Underlay and Overlay : An Overviewmentioning

confidence: 99%

A new transmission model in cognitive radio based on cyclic generalized polynomial codes for bandwidth reduction

Azam

Shah

Andrade

2014

Discrete Math. Algorithm. Appl.

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“…A predefined control-channel can be utilized for the management of channel selection and channel allocation tasks [12][13][14][15][16][17]. However, channel sensing and selection tasks in CRNs depend directly on the relative distance of the CR from the LU.…”

Section: Introductionmentioning

confidence: 99%

Reliable, Efficient, and Power Optimized Control-Channel Selection Scheme for Cognitive Radio Networks

Aslam

Shahid

Lee

2013

Mathematical Problems in Engineering

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This paper presents a centralized control-channel selection scheme for cognitive radio networks (CRNs) by exploiting the variation in the spectrum across capacity, occupancy, and error rate. We address the fundamental challenges in the design of the controlchannel for CRNs: (1) random licensed users (LUs) activity and (2) the economical and vulnerability concerns for a dedicated control-channel. We develop a knapsack problem (KP) based reliable, efficient, and power optimized (REPO) control-channel selection scheme with an optimal data rate, bit error rate (BER), and idle time. Moreover, we introduce the concept of the backup channels in the context of control-channel selection, which assists the CRs to quickly move on to the next stable channel in order to cater for the sudden appearance of LUs. Based on the KP and its dynamic programming solution, simulation results show that the proposed scheme is highly adaptable and resilient to random LU activity. The REPO scheme reduces collisions with the LUs, minimizes the alternate channel selection time, and reduces the bit error rate (BER). Moreover, it reduces the power consumed during channel switching and provides a performance, that is, competitive with those schemes that are using a static control-channel for the management of control traffic in CRNs.

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“…Concerning information exchange for cooperative sensing in CR networks, Pan et al [21] provided a solution consisting of transmitting low-data control information in a wideband channel avoiding interference with the licensed activity. Similarly, Masri et al suggested the implementation of a common control channel using ultra wide band (UWB) [22]. However, and to the authors' best knowledge, existing literature lacks feasible and practical implementations of message exchange mechanisms among corresponding entities in a CR network.…”

Section: Introductionmentioning

confidence: 99%

Implementing opportunistic spectrum access in LTE-advanced

Osa

Herranz

Monserrat

et al. 2012

J Wireless Com Network

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Long term evolution advanced (LTE-A) has emerged as a promising mobile broadband access technology aiming to cope with the increasing traffic demand in wireless networks. However, the enhanced spectral efficiency offered by LTE-A may become futile without a better management of scarce and overcrowded electromagnetic spectrum. In this sense, cognitive radio (CR) has been proposed as a potential solution to the problem of spectrum scarcity. Among all the mechanisms provided by CR, opportunistic spectrum access (OSA) aims at a dynamic and seamless use of certain licensed bands provided the licensee is not harmfully affected. This operation requires spectral awareness in order to avoid interferences with licensed systems. In spite of implementing some spectrum sensing mechanisms, LTE-A technology lacks other tools that are needed in order to improve the knowledge of the radio environment. This work studies the adoption of a Geo-located data base (Geo-DB) that cooperatively retrieves and maintains information regarding the location of unutilized portions of spectrum potentially available for OSA. Moreover, the potential benefit of this LTE-compliant OSA solution is evaluated using a calibrated simulation tool, by which numerical results allow us to optimally configure the system and show that the proposed opportunistic system is able to significantly improve its performance.

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Control information exchange through UWB in cognitive radio networks

Cited by 17 publications

References 8 publications

A new transmission model in cognitive radio based on cyclic generalized polynomial codes for bandwidth reduction

A new transmission model in cognitive radio based on cyclic generalized polynomial codes for bandwidth reduction

Reliable, Efficient, and Power Optimized Control-Channel Selection Scheme for Cognitive Radio Networks

Implementing opportunistic spectrum access in LTE-advanced

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