Novel overlay/underlay cognitive radio waveforms using SD-SMSE framework to enhance spectrum efficiency- part i: theoretical framework and analysis in AWGN channel

Chakravarthy, Vasu; Li, Xue; Wu, Zhiqiang; Temple, Michael A.; Garber, Frederick; Kannan, Rajgopal; Vasilakos, Athanasios V.

doi:10.1109/tcomm.2009.12.080400

Cited by 138 publications

(95 citation statements)

References 26 publications

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“…The forwarding strategy chosen will severely affect the protocol design and its performance [2]. Prominent examples are cognitive radio [57][58][59], network coding [60,61] and directional routing [62,63]. Moreover, the spatial reusability of the wireless communication media must be carefully considered in order to improve the end-to-end throughput in multi-hop wireless networks [64][65][66].…”

Section: Page 20 Of 22mentioning

confidence: 99%

DCRP: a scalable path selection and forwarding scheme for IEEE 802.11s wireless mesh networks

Sampaio

Souto

Vasques

2015

J Wireless Com Network

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The IEEE 802.11s standard specifies a mesh technology to be supported by IEEE 802.11 devices. Among the limitations caused by this heritage, we focus on the low scalability of the current IEEE 802.11s standard mechanisms. As a main contribution to the related research field, this article presents the DHT-based Cluster Routing Protocol (DCRP). DCRP addresses IEEE 802.11s' scalability issues by exploiting both Distributed Hash Tables and Clustering schemes, which have proved to be effective in scaling wireless (e.g., MANETs) and wired (e.g., P2P) networking systems. DCRP was implemented and compared with the HWMP through simulation for different scalability parameters and performance metrics. Simulation results indicate that the proposed scheme improves performance in terms of packet delivery ratio, end-to-end delay, throughput, and overhead.

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Section: Page 20 Of 22mentioning

confidence: 99%

DCRP: a scalable path selection and forwarding scheme for IEEE 802.11s wireless mesh networks

Sampaio

Souto

Vasques

2015

J Wireless Com Network

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“…According to [24] underlay uses more spectrum than overlay approaches and operates below the noise floor of PUs. Besides, underlay-CR waveform is able to adapt its bandwidth regarding user requirements and environmental conditions.…”

Section: Studies On Multichannel Operationmentioning

confidence: 99%

Assessment of the peak-to-average power ratio in different channel organization strategies

Bertrán

2015

Telecommun Syst

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The benefits of organizing multichannel communications by fragmenting the data in bonded or in aggregated channels have been usually assessed at the MAC (Media Access Control) layer, being the network traffic the purpose of the studies. Despite the importance of the different kinds of channel organizations over the transmit signal PAPR (Peak-to Average Power Ratio) to size the back-off value of the power amplifier, little attention has been paid to it. In this paper the key aspect is the PAPR, which is fundamental to face transmitter designs optimizing the trade-off between linearity and the time-oflife of the batteries. The results are of interest not only in ad-hoc cognitive radio networks, but also in some of the latest ETSI (European Telecommunications Standards Institute) and IEEE (Institute of Electrical and Electronics Engineers) standards supporting mobility in either WLAN (Wireless Local Area Network) environments or in cellular communications. A standardized radio link is used to model a realistic scenario to study different settings of the aggregate channels and to compare them with channel bonding alternatives. Besides, the suitability of some crest factor reduction (CFR) techniques is here considered for different channel organizations. The results show how the channel organization (contiguous, regular and random spaced), either with bonded or aggregated strategies, affects the PAPR.

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“…In [21], the authors study the optimal scheduling problem with the objective to achieve proportional fairness of the long-term average transmission rates among different links in a cognitive ad hoc network with spectrum underlay. Hybrid overlay/underlay CR waveforms were designed to adapt its spectrum to efficiently exploit both unused spectrum holes and underused spectrum bands through OFDM and MC-CDMA in [22].…”

Section: B Related Workmentioning

confidence: 99%

Cognitive Jointly Optimal Code-Division Channelization and Routing Over Cooperative Links

Pados¹,

Melodia²,

Batalama³

2014

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Novel overlay/underlay cognitive radio waveforms using SD-SMSE framework to enhance spectrum efficiency- part i: theoretical framework and analysis in AWGN channel

Cited by 138 publications

References 26 publications

DCRP: a scalable path selection and forwarding scheme for IEEE 802.11s wireless mesh networks

DCRP: a scalable path selection and forwarding scheme for IEEE 802.11s wireless mesh networks

Assessment of the peak-to-average power ratio in different channel organization strategies

Cognitive Jointly Optimal Code-Division Channelization and Routing Over Cooperative Links

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