Drone-assisted public safety wireless broadband network

Author(s):  
Xu Li ◽  
Dongning Guo ◽  
Huarui Yin ◽  
Guo Wei
2020 ◽  
Vol 197 ◽  
pp. 106775 ◽  
Author(s):  
Madison L. Hassler ◽  
Daniel J. Andrews ◽  
Barry C. Ezell ◽  
Thomas L. Polmateer ◽  
James H. Lambert

Enfoque UTE ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 28-44
Author(s):  
Luis Alberto Núñez-Lira ◽  
Marco Aurelio Rosario Villarreal ◽  
Javier Francisco Javier Márquez Camarena ◽  
Janeth Bertha Mariño Arroyo

Consiste en diseñar y evaluar el rendimiento de una red inalámbrica de banda ancha en la provincia de Huaytará, para la conectividad a internet. Es una investigación aplicada y experimental donde se evaluó los parámetros de rendimiento de la red. La variable dependiente es la capacidad de la celda Wlan y  los parámetros de QoS; y como variables independientes la cobertura y la densidad de la red Wlan. Se puede afirmar que para radios de hasta 8 metros, la tasa de datos del cliente experimental es superior a la tasa de datos del cliente control, y para radios mayores a 15 metros, las tasas de datos del cliente experimental y control no son diferentes. En cuanto a los parámetros de QoS, son favorables para las aplicaciones multimedia. La red implementada con tecnología TDM-E1/Ethernet e IEEE 802.11n, tiene una capacidad máxima por celda de 32.5 Mbps en la banda de 2.4G y de 65 Mbps en la banda de 5.8G, considerando parámetros de operación mínimo de los dispositivos inalámbricos. Los usuarios tienen un tasa de datos en campo de 15.2 Mbps para una radio máximo de 8 metros con hasta 7 usuarios inalámbricos conectados en la celda, en 2.4 Ghz.


Author(s):  
Nibras Habeeb Attrah ◽  
Ghassan H. Abdul-Majeed ◽  
Mahmood Zaki Abdullah

The expansion of networks involved higher jump on the users utilizing the networks resources, which may require extra higher bandwidth. Due to the development of technology especially those folded under the Internet of Things (IoT), the new demand of higher data rate is been witnesses among the users. In order to feed the demand of users with high data rate, broadband networks are required where high data rate can be ensured for each user. Broadband networks can be established using optical network that carries the data through wide broadband. Areas such as rural and forests sides which are witnessing plenty of natural obstacles such as mountains, trees, seas, etc. are forming big challenge for propagating a cable (wire) or optical network. Due to the limitations of the wire network, World Interoperability for Microwave Access (WiMAX) technology has been introduced as substitution for the broadband network. Such kind of alternative can be deployed through any geographical area without concerning on the wire paths. WiMAX preserved large coverage area and hence it may not suffer from the signal hand-off as in the case of another wireless network. In this project, Chordal Ring network topology is implemented to enhance the performance of wireless broadband network. With different routing protocols such as Destination Sequenced Distance Vector Protocol (DSDV) and Ad hoc On Demand Distance Vector (AODV), the network performance was examined for various Chordal Ring degree (e.g. fourth degree and fifth degree). Performance metrics such as number of transmitted packets, number of received packers, delivered packet rate (PDR), total number of drop packers (DP) and average queuing delay (been measured). Finally, the obtained results had been shown that fifth-degree Chordal Ring network is outperforming through DSDV routing protocol


Desalination ◽  
2007 ◽  
Vol 206 (1-3) ◽  
pp. 286-294 ◽  
Author(s):  
S.A. Avlonitis ◽  
M. Pappas ◽  
K. Moutesidis ◽  
M. Pavlou ◽  
P. Tsarouhas ◽  
...  

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