Energy‐efficient exploration and exploitation of multichannel diversity in spectrum sharing systems

Xu, Yuhua; Shen, Liang; Anpalagan, Alagan; Wu, Qihui; Wang, Jinlong; Xu, Yitao

doi:10.1002/ett.2527

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…We believe that both physical and MAC evolvability can significantly improve the performance of self‐configuring systems. Approaches based on cognitive radio (similar with those proposed in ) can be effectively considered and integrated in the STEM‐Net framework. Moreover, explicit distributed interference avoidance mechanisms through channel selection, such as those analysed in , can be profitable for our proposal.…”

Section: The Stem‐network Architecturementioning

confidence: 99%

STEM‐Net: an evolutionary network architecture for smart and sustainable cities

Aloi

Bedogni

Felice

et al. 2014

Trans. Emerging Tel. Tech.

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The concept of smart city has emerged worldwide as a feasible answer to the challenges raised by the increasing urbanisation. From the technological point of view, guaranteeing ubiquitous connectivity, reliable communications and seamless integration of multiple network access technologies are mandatory in a smart city. This is in contrast with the current infrastructure deployment in several urban areas, which is characterised by lack of ubiquitous connectivity and coverage and by fragmentation of networks that are usually deployed by different operators and without any centralised control by the city authorities. In this paper, we look at the heterogeneity of devices and network technologies under a different perspective by not perceiving it as a limitation but as a potential to increase the connectivity in a smart city. We propose a new generation of network nodes, called stem nodes, based on the innovative idea of 'stemness', which pushes forward the well-known self-configuration and self-management concepts towards the idea of node mutation and evolution. We also deployed prototypes that demonstrate the stem-node architecture and basic operations in different hardware platforms of common communication devices (an Alix-based router, a laptop and a smartphone).

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Section: The Stem‐network Architecturementioning

confidence: 99%

STEM‐Net: an evolutionary network architecture for smart and sustainable cities

Aloi

Bedogni

Felice

et al. 2014

Trans. Emerging Tel. Tech.

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“…In , the authors studied cases when the PU accesses its channel in the non‐time‐slotted mode. In , the authors considered multiple channels and proposed a scheme to maximise spectrum opportunities by finding the optimal sensing period and probing sequence.…”

Section: Related Workmentioning

confidence: 99%

“…The requirements on more spectrum resources and the fact that almost all spectrum resources have been allocated but with extremely low occupancy ratio have motivated the development of new dynamic spectrum access policies aiming to improve spectrum utilisation. In the past several years, there have been many research on dynamic spectrum access policies , which aim to improve spectrum utilisation.…”

Section: Introductionmentioning

confidence: 99%

An energy‐preserving spectrum access strategy in mobile cognitive radio networks

Xiao

Wang

Zhang

et al. 2013

Trans. Emerging Tel. Tech.

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Cognitive radio techniques provide potential solutions to the spectrum crisis problem. In cognitive radio networks, a secondary user (SU) opportunistically accesses the authorised spectrum of a primary user (PU) to transmit its data. In order to avoid collisions with the PU, the SU needs to frequently detect the status of the channel before accessing the spectrum. However, frequent detection of channel status consumes a lot of energy, which is unaffordable for mobile SUs. In this paper, we investigate how to preserve the limited energy of SUs in mobile cognitive networks. Besides the sensing and transmitting actions used in traditional spectrum access policies, we introduce a new sleeping action with which mobile SUs can better exploit the trade-off between their consumption and data transmission throughput. We define a utility function to characterise the effect of sleeping actions, in which correct sleeping actions are rewarded for preserving energy, and incorrect sleeping actions are penalised for wasting data transmission opportunities. We prove that, in the meaning of maximising the mean benefit, the utility function exhibits a threshold-based structure. Based on this structure, we design a new spectrum access strategy with which mobile SUs can chose their optimal actions to achieve the best trade-off between energy consumption and throughput. Simulation results show that our spectrum access strategy greatly reduces energy consumption of mobile SUs by up to 85% and, meanwhile, incurs nearly the same PU collision rate and throughput as in state-of-the-art solutions.

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“…Recently, cognitive radio (CR) has been considered as a promising field toward future wireless communications by accommodating secondary systems to enhance the spectrum utilization [1]- [3]. This motivates the concepts of Opportunistic Spectrum Access (OSA), which is a crucial technique of cognitive radio schemes [4]- [7] to solve the spectrum scarcity problem by more efficient spectrum utilization [8].…”

Section: Introductionmentioning

confidence: 99%

A simple priority scheme with spectrum partition for multiuser opportunistic spectrum access in cognitive radio networks

Chen

2013

2013 IEEE 4th International Conference on Electronics Information and Emergency Communication

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In this paper, a multiuser optimal stopping strategy for Opportunistic Spectrum Access (OSA) is proposed. In practical cognitive radio networks (CRNs), secondary users (SUs) usually have their own priorities of spectrum occupation, that is, SU with higher priority has a better chance to access idle channels in the spectrum. Since all SUs share the same spectrum information, throughput of the SUs with low priorities will be quite low even null if idle channels are always allocated to the SUs with high priorities. In another aspect, even if the SUs with low priorities also have chance to access idle channels, collisions will happen because of the competition among SUs. In order to increase system throughput of all SUs and avoid such collisions, we formulate this problem as an optimal stopping problem and propose an effective priority scheme with spectrum partition. In view of users' priorities, spectrum is partitioned completely into several channel sets, the amount of which equals to that of SUs.Thus, the problem can be simplified into multiple single-user cases. In each slot, each SU utilizes optimal stopping rule to determine which channel to access in consideration of channel states and exploration overhead. Simulation results show the effectiveness of the proposed strategy.

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Energy‐efficient exploration and exploitation of multichannel diversity in spectrum sharing systems

Cited by 7 publications

References 16 publications

STEM‐Net: an evolutionary network architecture for smart and sustainable cities

STEM‐Net: an evolutionary network architecture for smart and sustainable cities

An energy‐preserving spectrum access strategy in mobile cognitive radio networks

A simple priority scheme with spectrum partition for multiuser opportunistic spectrum access in cognitive radio networks

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