scholarly journals Cell Coverage Analysis of a Low Altitude Aerial Base Station in Wind Perturbations

2019 ◽  
Author(s):  
Navuday Sharma ◽  
Vishal Sharma ◽  
Maurizio Magarini ◽  
Haris Pervaiz ◽  
Muhammad Mahtab Alam ◽  
...  
Keyword(s):  
Base Station ◽  
Cell Coverage ◽  
Coverage Analysis ◽  
Low Altitude

scholarly journals Optimal Placement of Low-Altitude Aerial Base Station for Securing Communications

2019 ◽  
Vol 8 (3) ◽  
pp. 869-872 ◽  
Author(s):  
Dong Wang ◽  
Bo Bai ◽  
Guangzheng Zhang ◽  
Zhu Han
Keyword(s):  
Base Station ◽  
Optimal Placement ◽  
Low Altitude

An Efficient IR-HARQ Power Allocation for Relay-Aided Cellular Networks

2018 ◽  
Vol 27 (12) ◽  
pp. 1850195
Author(s):  
P. Mangayarkarasi ◽  
J. Raja
Keyword(s):  
Power Allocation ◽  
Cellular Networks ◽  
Channel Capacity ◽  
Energy Efficient ◽  
Base Station ◽  
Relay Station ◽  
Decode And Forward ◽  
Relay Placement ◽  
Cell Coverage ◽  
The Impact

Energy-efficient and reliable data transmission is a challenging task in wireless relay networks (WRNs). Energy efficiency in cellular networks has received significant attention because of the present need for reduced energy consumption, thereby maintaining the profitability of networks, which in turn makes these networks “greener”. The urban cell topography needs more energy to cover the total area of the cell. The base station does not cover the entire area in a given topography and adding more number of base stations is a cost prohibitive one. Energy-efficient relay placement model which calculates the maximum cell coverage is proposed in this work that covers all sectors and also an energy-efficient incremental redundancy-hybrid automatic repeat request (IR-HARQ) power allocation scheme to improve the reliability of the network by improving the overall network throughput is proposed. An IR-HARQ power allocation method maximizes the average incremental mutual information at each round, and its throughput quickly converges to the ergodic channel capacity as the number of retransmissions increases. Simulation results show that the proposed IR-HARQ power allocation achieves full channel capacity with average transmission delay and maintains good throughput under less power consumption. Also the impact of relaying performance on node distances between relay station and base station as well as between user and relay station and relay height for line of sight conditions are analyzed using full decode and forward (FDF) and partial decode and forward (PDF) relaying schemes. Compared to FDF scheme, PDF scheme provides better performance and allows more freedom in the relay placement for an increase in cell coverage.

Application of Cellular Communications Models and Designs for Use in Disaster-Aftermath Related Scenarios

2015 ◽  
Vol 7 (3) ◽  
pp. 46-56
Author(s):  
Stephen J. Curran
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Ground Level ◽  
Base Station ◽  
Cellular Communications ◽  
Fixed Position ◽  
Above Ground Level ◽  
High Altitude Platforms ◽  
Major Disaster ◽  
Future Strategy ◽  
Low Altitude

This paper is a pilot study on the concept of an aerial base station as a future strategy for restoring cellular communications in the aftermath of a major disaster. The strategy being studied makes use of low altitude platforms (LAPs) or unmanned aerial vehicles (UAVs) that can hover or orbit in a relatively fixed position and can act as an aerial base station. Unlike High Altitude Platforms (HAP) operating in a layer of the atmosphere above any existing air traffic, the LAPs or UAVs will be able to operate a few hundred to some thousands of meters above ground level. This paper also describes the functionality of the components comprising the aerial base station.

Internet of Drones-Enabled Smart Cities

2020 ◽  
pp. 107-133
Author(s):  
Navuday Sharma ◽  
Maurizio Magarini ◽  
Muhammad Mahtab Alam
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Channel Model ◽  
Smart Cities ◽  
Base Stations ◽  
Cell Coverage ◽  
Optimal Replacement ◽  
Coverage Analysis ◽  
Channel Parameters ◽  
Aerial Platforms ◽  
Flash Crowds

Unmanned aerial vehicles (UAVs) are expected to provide data service to users as aerial base stations, as gateways to collect the data from various sensors, and as sensor-mounted aerial platforms deployed in smart cities. The study in this chapter initially starts with the air-to-ground (A2G) channel model. Due to the unavailability of channel parameters for UAVs at low altitudes, measurements were performed using a radio propagation simulator for generalized environments developed using ITU-R parameters. Further, cell coverage analysis is shown with simulation results obtained from the ray tracing. Later, an optimal replacement to UDNs was proposed to support the flash crowds and smart cites known as ultra-dense cloud drone network. This system is advantageous as it offers reduction in total cost of ownership due to its on-demand capability. Further, work is shown on implementing parameters for 5G physical layer with generalized frequency division multiplexing modulation over A2G channel on the UAV network to provide reliable and faster connectivity for ground users and sensors.

Research on MS Setover Location Method with LOS on Multilateration

2011 ◽  
Vol 403-408 ◽  
pp. 2329-2332
Author(s):  
Feng Xun Gong ◽  
Yan Qiu Ma ◽  
Li Hua Dai
Keyword(s):  
Base Station ◽  
Base Stations ◽  
Measurement Information ◽  
Short Baseline ◽  
Location Accuracy ◽  
Location Method ◽  
Baseline System ◽  
Low Altitude ◽  
Geometric Dilution Of Precision ◽  
Main Station

Location accuracy for low-altitude targets is not well in Short-Baseline system. A program of main station off-center of eight-station arrangement is proposed. Firstly analyses factors influencing the location accuracy for line-of-sight environments. Then researches the relationship between main station position and location performance, put forwards a location method of main station off-center of eight-station by increasing the base-station number and layout of the main station off-center which realizes multiple coverage of monitoring area using the redundant measurement information by main station off-center and more base stations provided. Finally gets the number of base station and optimal disposition way for low-altitude targets in the airport through simulating geometric dilution of precision (GDOP) distribution. Simulation figures and dates show that the main station off-center of eight-station arrangement can be achieved over 95% coverage of the airport for low-altitude targets location.

scholarly journals Analisis Penataan Sel Untuk Layanan Sistem WCDMA Di Area Jalan Tengah I Kerobokan

2017 ◽  
Vol 16 (2) ◽  
pp. 95
Author(s):  
Alit Winaya ◽  
Gede Sukadarmika ◽  
Linawati Linawati
Keyword(s):  
Performance Indicator ◽  
Telecommunication Network ◽  
Base Station ◽  
Propagation Model ◽  
Base Stations ◽  
Quality Service ◽  
Coverage Area ◽  
Cell Coverage ◽  
Antenna Tilt ◽  
Tilt Change

In WCDMA system, signal service coverage determines quality service of telecommunication network . To give maximum network service at Jl. Tengah I Kerobokan area, thus requiring the study of the arrangement of the cell coverage on BTS Protpeliatan Sector ? and BTS AnyarKaja Sektor ?. The method used is calculation the distance of base station with proper propagation model which suits the condition of both base stations, also antenna azimuth and tilting were given, and simuation using Atoll software to see the predicted coverage area of BTS. As the result, suitable propagation for BTS Protpeliatan Sector ? is Okumurra Hatta model and BTS AnyarKaja Sektor ? is Cost 231 Hatta model, maximum coverage signal service of BTS Protpeliatan Sector ? is 1,17 km and for BTS AnyarKaja Sektor ? is 1,11 km. Requirement of antenna tilt change from 0º to 0,95º for BTS Protpeliatan Sektor ? and for pada BTS AnyarKaja Sektor ?, antenna tilt change from 0º to 1º and change of 30º antenna sector direction from 180º to 210º. From simulation using Atoll software with above parameters, acknowledge that area of Jl. Tengah I Kerobokan already get maximum service with received signal level pass the KPI (Key Performance Indicator) standard.  Dalam sistem WCDMA, cakupan layanan sinyal merupakan penentu kualitas layanan jaringan telekomunikasi. Untuk memberikan layanan jaringan yang  maksimal di area Jl. Tengah I Kerobokan maka dilakukan analisis penataan cakupan layanan sel pada BTS Protpeliatan Sektor ? dan BTS AnyarKaja Sektor ?. Metode yang digunakan yaitu perhitungan jarak cakupan BTS dengan model propagasi yang paling sesuai dengan kondisi kedua BTS, penentuan arah azimuth dan tilting antena, serta simulasi menggunakan Atoll untuk melihat prediksi cakupan layanan BTS. Didapatkan bahwa model propagasi yang sesuai dengan BTS Protpeliatan Sektor ? adalah  model Okumurra Hatta dan BTS AnyarKaja Sektor ? adalah model Cost 231 Hatta, jarak cakupan layanan maksimum BTS Protpeliatan Sektor ? adalah sejauh 1,17 km dan pada BTS AnyarKaja Sektor ? sejauh 1, 11 km. Diperlukan perubahan tilt antena dari 0º menjadi 0,95º  pada BTS Protpeliatan Sektor ? dan perubahan sudut tilt dari 0º menjadi 1º serta perubahan arah sekorisasi antena sebesar 30º dari 180º menjadi 210 º pada BTS AnyarKaja Sektor ?. Dari hasil simulasi yang dilakukan menggunakan software Atoll dengan parameter tersebut, diketahui bahwa area Jl. Tengah I Kerobokan telah mendapatkan layanan yang maksimal dengan level penerimaan sinyal yang telah memenuhi standar KPI (Key Performance Indictator).  

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