Uninterrupted Connectivity Using Conditional Time Split Energy Extraction With Beamforming System for Disaster Affected Wireless Networks

Ashok, K; Sudha, T.

doi:10.1109/access.2020.3034019

Cited by 10 publications

(5 citation statements)

References 35 publications

(40 reference statements)

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“…On the other hand, authors in [113] promoted a heterogeneous fleet that includes untethered drones for cellular coverage, tethered drones for high-capacity backhauling, and untethered powering drones for charging. In [135] a novel beamforming architecture, based on conditional time splitenergy extraction (CT-EE) for enhancing nodes' autonomy, was presented and compared to conventional beamforming and other energy extraction methods.…”

Section: E Energy Efficiencymentioning

confidence: 99%

See 1 more Smart Citation

Post-Disaster Communications: Enabling Technologies, Architectures, and Open Challenges

Matracia

Saeed

Kishk

et al. 2022

IEEE Open J. Commun. Soc.

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The number of disasters has increased over the past decade where these calamities significantly affect the functionality of communication networks. In the context of 6G, airborne and spaceborne networks offer hope in disaster recovery to serve the underserved and to be resilient in calamities. Therefore, our paper reviews the state-of-the-art literature on post-disaster wireless communication networks and provides insights for the future establishment of such networks. In particular, we first give an overview of the works investigating the general procedures and strategies for facing any large-scale disaster. Then, we present technological solutions for post-disaster communications, such as the recovery of the terrestrial infrastructure, installing aerial networks, and using spaceborne networks. Afterwards, we shed light on the technological aspects of post-disaster networks, primarily the physical and networking issues. We present the literature on channel modeling, coverage and capacity, radio resource management, localization, and energy efficiency in the physical layer part, and discuss the integrated space-air-ground architectures, routing, delay-tolerant/software-defined networks, and edge computing in the networking layer part. This paper also includes interesting simulation results which can provide practical guidelines about the deployment of ad hoc network architectures in emergency scenarios. Finally, we present several promising research directions, namely backhauling, cache-enabled and intelligent reflective surface-enabled networks, placement optimization of aerial base stations (ABSs), and the mobility-related aspects that come into play when deploying aerial networks, such as planning their trajectories and the consequent handovers (HOs).

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Section: E Energy Efficiencymentioning

confidence: 99%

“…Optimal placement [142] Solar powered UAVs [134] Beamforming, MIMO [135] 2021 Data retrieval [138] 2021 Energy harvesting, UAV, D2D [143]…”

mentioning

confidence: 99%

Post-Disaster Communications: Enabling Technologies, Architectures, and Open Challenges

Matracia

Saeed

Kishk

et al. 2022

IEEE Open J. Commun. Soc.

View full text Add to dashboard Cite

show abstract

“…On the other hand, authors in [123] promoted a heterogeneous fleet that includes untethered drones for cellular coverage, tethered drones for high-capacity backhauling, and untethered powering drones for charging. In [124] a novel beamforming architecture, based on conditional time split-energy extraction (CT-EE) for enhancing nodes' autonomy, was presented and compared to conventional beamforming and other energy extraction methods.…”

Section: F Energy Efficiencymentioning

confidence: 99%

“…Temporary communication system, DTN [120] Resilient networks [121] 2020 Solar powered UAVs [122] Beamforming, MIMO [124] 2021 Data retrieval [127] and load balancing. An interesting problem tackled with stochastic geometry is [128].…”

Section: F Energy Efficiencymentioning

confidence: 99%

Post-Disaster Communications: Enabling Technologies, Architectures, and Open Challenges

Matracia¹,

Saeed²,

Kishk³

et al. 2022

Preprint

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The number of disasters has increased over the past decade where these calamities significantly affect the functionality of communication networks. In the context of 6G, airborne and spaceborne networks offer hope in disaster recovery to serve the underserved and to be resilient in calamities. Therefore, this paper surveys the state-of-the-art literature on post-disaster wireless communication networks and provides insights for the future establishment of such networks. In particular, we first give an overview of the works investigating the general procedures and strategies for counteracting any large-scale disasters. Then, we present the possible technological solutions for post-disaster communications, such as the recovery of the terrestrial infrastructure, installing aerial networks, and using spaceborne networks.Afterward, we shed light on the technological aspects of post-disaster networks, primarily the physical and networking issues. We present the literature on channel modeling, coverage and capacity, radio resource management, localization, and energy efficiency in the physical layer and discuss the integrated space-air-ground architectures, routing, delay-tolerant/software-defined networks, and edge computing in the networking layer. This paper also presents interesting simulation results which can provide practical guidelines about the deployment of ad hoc network architectures in emergency scenarios. Finally, we present several promising research directions, namely backhauling, placement optimization of aerial base stations, and the mobility-related aspects that come into play when deploying aerial networks, such as planning their trajectories and the consequent handovers.Maurilio Matracia and Mohamed-Slim Alouini are with the Computer, Electrical, and Mathematical Sciences and Engineering

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“…To fully explore the performance of an mmWave massive MIMO system, the transmitter needs to know the channel state information (CSI) accurately [6]- [8], and this is challenging when the hybrid beamforming architecture is adopted. One reason for this is that the scale of the channel matrix increases with the number of antennas, estimating each entry independently through the conventional least squares (LS) technique requires an unacceptable amount of training overhead.…”

Section: Introductionmentioning

confidence: 99%

Spatial Spectrum-Based Channel Estimation for Wideband mmWave System With Beam Squint

Guan

Wang

et al. 2021

IEEE Access

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Channel estimation for millimeter wave (mmWave) systems is challenging due to their large antenna arrays. Owing to the sparse scattering nature of the mmWave channel, channel estimation can be performed by estimating the directions and the gains of paths. Most existing schemes assume that a wideband mmWave channel exhibits a common sparsity in the frequency domain. Unfortunately, they ignore the beam squint effect caused by the wide bandwidth, resulting in severe performance loss. In this paper, we investigate the wideband channel estimation problem with beam squint. Specifically, by utilizing measurement signals at all subcarriers, we propose a spatial spectrum-based scheme for a subarray architecture that requires only a single training slot. We first prove that the scheme can accurately obtain the spatial spectrum from a theoretical perspective. Then, we design the beamforming weights of the subarray to avoid pseudo peaks and analyze the inherent spectrum ambiguity phenomenon under the subarray architecture. Finally, to cope with beam squint, we divide the entire bandwidth into multiple subbands and design a combination criterion for the spatial spectrum of each subband. During this process, we prove that the spectrum ambiguity is eliminated, and the joint estimation of the path directions can be obtained. Simulation results demonstrate that the proposed scheme has better estimation accuracy than other methods and significantly reduces the required number of training slots.

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Uninterrupted Connectivity Using Conditional Time Split Energy Extraction With Beamforming System for Disaster Affected Wireless Networks

Cited by 10 publications

References 35 publications

Post-Disaster Communications: Enabling Technologies, Architectures, and Open Challenges

Post-Disaster Communications: Enabling Technologies, Architectures, and Open Challenges

Post-Disaster Communications: Enabling Technologies, Architectures, and Open Challenges

Spatial Spectrum-Based Channel Estimation for Wideband mmWave System With Beam Squint

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