Base stations placement optimization in wireless networks for emergency communications

Kosmerl, Joze; Vilhar, Andrej

doi:10.1109/iccw.2014.6881196

Cited by 89 publications

(75 citation statements)

References 5 publications

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“…Hourani et al, 18 obtain the optimal altitude deployment of an ABS in order to maximize the coverage. They model the channel in a general form considering both the line of sight (LOS) and nonline of sight (NLOS) link establishment Košmerl and Vilhar 19 enhance the coverage performance in public safety communications by obtaining the optimal deployment of ABSs. Hayajneh et al 20 optimize the ABS altitude in different performance metrics.…”

Section: Related Workmentioning

confidence: 99%

Joint resource allocation, 3D placement, and user association in ABS‐supported IoT networks considering adaptive modulation technique

Azizi

Mokari

2019

Trans Emerging Tel Tech

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In this paper, a novel method for joint resource allocation, three-dimensional placement, and user association as a predominant problem in the internet of things (IoTs) networks is proposed. We consider two kinds of channel models for the links between users and aerial base stations (ABSs), namely (a) line of sight (LoS) model and (b) generalized model. In the LoS case, all the ABSs should establish LoS communications path toward IoT users. In the generalized case, the ABSs channels toward the IoT users could be LoS or nonline of sight. We propose four different scenarios, namely interference-free (IF)-LoS, IF-Generalized, interference-included (II)-LoS, and II-Generalized. The IF-LoS and IF-Generalized cases consider subcarrier and modulation order as the resources while the II-LoS and II-Generalized cases consider transmit power, subcarrier, and modulation order as the resources. Our objective function is minimizing the overall transmit power of the IoT users while satisfying some quality of service constraints in the uplink. To solve the resulting nonconvex optimization problem, we convert the main problem with high complexity into the subproblems with low complexities. We compare the performance of our joint proposed scenario with other joint and disjoint cases for the IF-LoS, IF-Generalized, II-LoS, and II-Generalized cases. Moreover, we evaluate the performance of the proposed schemes for different numbers of ABSs, environment types, target areas, and numbers of IoT users.Trans Emerging Tel Tech. 2019;30:e3632.wileyonlinelibrary.com/journal/ett

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Section: Related Workmentioning

confidence: 99%

Joint resource allocation, 3D placement, and user association in ABS‐supported IoT networks considering adaptive modulation technique

Azizi

Mokari

2019

Trans Emerging Tel Tech

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“…There are a total number of 4 AeNBs and 30 PLMUs in the 12 km by 9 km area. A BS placement optimization using evolutionary algorithm developed in [10] has been applied as the preliminary setup of the network. The algorithm maximizes the coverage and network capacity according to statistical information of the terrain and traffic distribution.…”

Section: System Model and Architecturementioning

confidence: 99%

Using k-means clustering with transfer and Q learning for spectrum, load and energy optimization in opportunistic mobile broadband networks

Zhao

Grace

Vilhar

et al. 2015

2015 International Symposium on Wireless Communication Systems (ISWCS)

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In this paper, we investigate the use of an integrated machine learning algorithm to jointly optimize the spectrum allocation, load balancing and energy saving aspects in the opportunistic mobile broadband network for temporary event and disaster relief scenarios. A novel k-means algorithm has been developed to dynamically partition the users in a cell into clusters, to improve interference mitigation and spectrum reuse. It is integrated with a Q learning algorithm for resource allocation and transfer learning algorithm for cell selection. Topology management is developed using Q learning to improve BS placement and sleep mode operation. System simulation is carried out using a practical Ljubljana scenario. Compared to the classical LTE resource allocation and cell selection approach, clustered Q learning and transfer learning achieves significant QoS improvement in terms of spectrum and load optimization. With topology management, the learning algorithms show an effective balance between energy saving and QoS.

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“…Due to a unique geometry in HAPs uplink channel, the interferences will be originated from all users at it's serving beam and also users from adjacent beams (Ilcev & Sibiya, 2015;Jong-Min Park et al, 2002;Kosmerl & Vilhar, 2014). Every user will give a different interference effect based on its position to the interfered user which determined by the boresight angle as can be seen in Fig.…”

Section: Simulation Modelmentioning

confidence: 99%

“…In a DS-CDMA system the spread spectrum waveform is characterized by the Number of chips per symbol M, the chip waveforms and the types of spreading sequence of length M. Consider a CDMA system with quadrature phase shift keying (QPSK) modulation as can be seen in Fig. 3 (Kosmerl & Vilhar, 2014 (Kurniawan, 2003).…”

Section: Cdma Concept and Haps Channel Modelmentioning

confidence: 99%

“…Those are for cellular 3G, 4G, and 5G broadband wireless technology (El-Jabu & Steele, 2001;Hidayat & Iskandar, 2015;Iskandar & Shimamoto, 2005, 2006 DOI: 10.17933/bpostel.2016.140101 Pavlidou, 2005aPavlidou, , 2005bPereira & Heckler, 2015;Waluyo & Iskandar, 2015), weather and climate observation (Ilcev & Sibiya, 2015), and emergency system (Kosmerl & Vilhar, 2014). HAPs is being located around 20 km above the ground.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Variable step closed-loop power control with space diversity for low elevation angle High Altitude Platforms communication channel [Langkah variabel kontrol daya tertutup dengan keragaman ruang untuk sudut elevasi rendah pada kanal komunikasi HAPs]

Iskandar¹,

Kurniawan²,

Ernawan³

2016

bul. pos. dan telekomun.

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This paper proposes variable step closed loop power control algorithm combined with space diversity to improve the performance of High Altitude Platforms (HAPs) communication at low elevation angle using Code Division Multiple Access (CDMA). In this contribution, we first develop HAPs channel model which is derived from experimental measurement. From our experiment, we found HAPs channel characteristic can be modeled as a Ricean distribution because the presence of line of sight path. Different elevation angle resulting different K factor value. This value is then used in Signal to Interference Ratio (SIR) based closed loop power control evaluation. The variable step algorithm is simulated under various elevation angles with different speed of mobile user. The performance is presented in terms of user elevation angle, user speed, step size and space diversity order. We found that the performance of variable step closed-loop power control less effective at low elevation angle. However our simulation shows that space diversity is able to improve the performance of closed loop power control for HAPs channel at low elevation angle.*****Kajian ini mengusulkan suatu algoritma kontrol daya langkah variabel loop tertutup dikombinasikan dengan keragaman ruang untuk meningkatkan kinerja komunikasi High Altitude Platforms(HAPs) pada sudut elevasi rendah menggunakan Code Division Multiple Access (CDMA). Kami berkontribusi untuk mengembangkan model kanal HAPs yang berasal dari pengukuran eksperimental sebelumnya. Dari percobaan tersebut, kami menemukan karakteristik kanal HAPs yang dapat dimodelkan sebagai distribusi Ricean karena kehadiran jalur tanpa penghalang. Eksperimen menunjukkan bahwa perbedaan sudut elevasi menghasilkan perbedaan nilai factor K. Nilai ini kemudian digunakan dalam Signal to Interference Ratio (SIR) berbasiskan evaluasi kontrol daya loop tertutup. Algoritma langkah variabel disimulasikan dibawah sudut elevasi yang berbeda dengan kecepatan yang berbeda dari pengguna vobile. Kinerja tersebut disajikan dalam hal sudut elevasi pengguna, kecepatan pengguna, ukuran langkah dan ketertiban ruang keanekaragaman. Kami menemukan bahwa kinerja langkah variabel kontrol daya loop tertutup kurang efektif pada sudut elevasi rendah. Namun simulasi kami menunjukkan bahwa ruang keragaman mampu meningkatkan kinerja kontrol daya loop tertutup untuk kanal HAPs di sudut elevasi rendah.

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Base stations placement optimization in wireless networks for emergency communications

Cited by 89 publications

References 5 publications

Joint resource allocation, 3D placement, and user association in ABS‐supported IoT networks considering adaptive modulation technique

Joint resource allocation, 3D placement, and user association in ABS‐supported IoT networks considering adaptive modulation technique

Using k-means clustering with transfer and Q learning for spectrum, load and energy optimization in opportunistic mobile broadband networks

Variable step closed-loop power control with space diversity for low elevation angle High Altitude Platforms communication channel [Langkah variabel kontrol daya tertutup dengan keragaman ruang untuk sudut elevasi rendah pada kanal komunikasi HAPs]

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