A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku, Hena; Fazliu, Zana Limani; Ibrani, Mimoza

doi:10.1155/2018/7256835

Cited by 9 publications

(11 citation statements)

References 58 publications

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“…Based on this under-use of spectrum originally meant only for TV broadcasting, regulators are opening up this previously licensed spectrum for unlicensed use [25]. TV whitespaces for unlicensed use brought about a revolution to cognitive radio, spectrum sensing as well as to dynamic spectrum access [26]. TV whitespaces allow for the opportunistic use of vacant TV channels for data communications [27,28].…”

Section: Dynamic Spectrum Accessmentioning

confidence: 99%

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

Figueiredo

Mennes

Jabandzic

et al. 2020

Sensors

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The next generation of wireless and mobile networks will have to handle a significant increase in traffic load compared to the current ones. This situation calls for novel ways to increase the spectral efficiency. Therefore, in this paper, we propose a wireless spectrum hypervisor architecture that abstracts a radio frequency (RF) front-end into a configurable number of virtual RF front ends. The proposed architecture has the ability to enable flexible spectrum access in existing wireless and mobile networks, which is a challenging task due to the limited spectrum programmability, i.e., the capability a system has to change the spectral properties of a given signal to fit an arbitrary frequency allocation. The proposed architecture is a non-intrusive and highly optimized wireless hypervisor that multiplexes the signals of several different and concurrent multi-carrier-based radio access technologies with numerologies that are multiple integers of one another, which are also referred in our work as radio access technologies with correlated numerology. For example, the proposed architecture can multiplex the signals of several Wi-Fi access points, several LTE base stations, several WiMAX base stations, etc. As it able to multiplex the signals of radio access technologies with correlated numerology, it can, for instance, multiplex the signals of LTE, 5G-NR and NB-IoT base stations. It abstracts a radio frequency front-end into a configurable number of virtual RF front ends, making it possible for such different technologies to share the same RF front-end and consequently reduce the costs and increasing the spectral efficiency by employing densification, once several networks share the same infrastructure or by dynamically accessing free chunks of spectrum. Therefore, the main goal of the proposed approach is to improve spectral efficiency by efficiently using vacant gaps in congested spectrum bandwidths or adopting network densification through infrastructure sharing. We demonstrate mathematically how our proposed approach works and present several simulation results proving its functionality and efficiency. Additionally, we designed and implemented an open-source and free proof of concept prototype of the proposed architecture, which can be used by researchers and developers to run experiments or extend the concept to other applications. We present several experimental results used to validate the proposed prototype. We demonstrate that the prototype can easily handle up to 12 concurrent physical layers.

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Section: Dynamic Spectrum Accessmentioning

confidence: 99%

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

Figueiredo

Mennes

Jabandzic

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…Based on this under-utilization of spectrum originally meant only for TV broadcasting, regulators are opening up this previously licensed spectrum for unlicensed use [21]. TV white-spaces for unlicensed use brought about a revolution to cognitive radio, spectrum sensing as well as to dynamic spectrum access [22]. TV white-spaces allow for the opportunistic use of vacant TV channels for data communications [23,24].…”

Section: A Dynamic Spectrum Accessmentioning

confidence: 99%

A Base-Band Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM signals

Figueiredo¹,

Mennes²,

Jabandzic³

et al. 2019

Preprint

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The next generation of wireless and mobile networks will have to handle a significant increase in traffic load compared to the actual one. This situation calls for novel ways to increase spectral efficiency. Therefore in this paper, we propose a wireless spectrum hypervisor architecture that abstracts a radio frequency (RF) front-end into a configurable number of virtual RF front-ends. The proposed architecture has the ability to enable flexible spectrum access in existing wireless and mobile networks, which is a challenging task due to the limited spectrum programmability, $i.e.$, the capability a system has to change the spectral properties of a given signal to fit an arbitrary frequency allocation. The main goal of the proposed approach is to improve spectral efficiency by efficiently using vacant gaps in congested spectrum-bandwidths or adopting network densification through infrastructure sharing. We demonstrate mathematically how our proposed approach works and present several simulation results proving its functionality and efficiency. Additionally, we designed and implemented an open-source and free proof of concept prototype of the proposed architecture, which can be used by researchers and developers to run experiments or extend the concept to other applications. We present several experimental results used to validate the proposed prototype. We demonstrate that the prototype can easily handle up to 12 concurrent physical layers.

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“…The efficient spectrum utilization is achieved by using TVWS network but it gives many challenges while operating in heterogeneous network scenario. These challenges are mainly classified in to three categories as spectrum sensing, spectrum sharing and interference mitigation [6].…”

Section: Introductionmentioning

confidence: 99%

Interference Mitigation of Heterogeneous Cognitive Radio Network using Spatial Diversity

Adekar¹,

Kureshi²

2019

IJEAT

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The heterogeneous cognitive radio networks are playing the most important role in the future generation wireless networks in order to address the problem of spectrum scarcity and to satisfy the demand of multiple coexistence networks. . In a country like India the deployment of CRN is possible on television network with the help of TV White Spaces (TVWS) as its capacity is quite high due to digital transmission of TV channel. The use of multiple wireless standards such as IEEE 802.11a, IEEE 802.22, IEEE 802.19.1 and many more wireless networks operating in the same frequency band of TVWS creates the coexistence scenario which involves the heterogeneous networks. The interference mitigation is the most important issue in such heterogeneous networks. In literature, the issue of interference mitigation is addressed mainly at the medium access layer; however, very limited work is presented at physical layer. In this paper, an interference mitigation problem of heterogeneous cognitive radio network at physical layer is addressed. The spatial diversity based techniques are proposed to mitigate the interference in heterogeneous CRN. The coexistence of different wireless networks in secondary CRN is considered for analysis. The characterization of aggregate interference is carried out for different interference scenarios. The proposed system outperform for heterogeneous CRN network over TVWS network

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A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Cited by 9 publications

References 58 publications

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

A Baseband Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM Signals

A Base-Band Wireless Spectrum Hypervisor for Multiplexing Concurrent OFDM signals

Interference Mitigation of Heterogeneous Cognitive Radio Network using Spatial Diversity

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