scholarly journals Age of Information Based URLLC-enabled UAV Wireless Communications System

2021 ◽  
Author(s):  
Chathuranga Basnayaka
Keyword(s):  
Wireless Communications ◽  
Communications System ◽  
Age Of Information

scholarly journals Age of Information Based URLLC-enabled UAV Wireless Communications System

2021 ◽  
Author(s):  
chathuranga basnayaka
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Communication System ◽  
Block Length ◽  
Closed Form Expression ◽  
Destination Node ◽  
Wireless Communication System ◽  
Short Packet ◽  
Communications System ◽  
Age Of Information

<div>This paper considers an unmanned aerial vehicles (UAV) communication network, where UAV operate as an aerial mobile relay between a source and a destination of the network. To capture the “timeliness” of the received information at the destination node, a new performance metric named age of information (AoI) is considered. In addition, a short packet communication scheme maintains low latency in the proposed UAV wireless communication system. The finite block-length theory investigates the performances of short packet communications scheme in the UAV-assisted wireless communications system. In this paper, the Average Age of Information (AAoI) is estimated by applying the Stochastic Hybrid Systems (SHS) model. The SHS model comprises discrete states represents events that reset the AoI process and continuously dynamics that represent linearly growing age processes. Finally, a closed-form expression for the AAoI of the proposed UAV wireless communication system is derived and it can be used to estimate the optimal altitude, block length and other parameters.</div>

scholarly journals Age of Information Based URLLC-enabled UAV Wireless Communications System

2021 ◽  
Author(s):  
chathuranga basnayaka
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Communication System ◽  
Block Length ◽  
Closed Form Expression ◽  
Destination Node ◽  
Wireless Communication System ◽  
Short Packet ◽  
Communications System ◽  
Age Of Information

<div>This paper considers an unmanned aerial vehicles (UAV) communication network, where UAV operate as an aerial mobile relay between a source and a destination of the network. To capture the “timeliness” of the received information at the destination node, a new performance metric named age of information (AoI) is considered. In addition, a short packet communication scheme maintains low latency in the proposed UAV wireless communication system. The finite block-length theory investigates the performances of short packet communications scheme in the UAV-assisted wireless communications system. In this paper, the Average Age of Information (AAoI) is estimated by applying the Stochastic Hybrid Systems (SHS) model. The SHS model comprises discrete states represents events that reset the AoI process and continuously dynamics that represent linearly growing age processes. Finally, a closed-form expression for the AAoI of the proposed UAV wireless communication system is derived and it can be used to estimate the optimal altitude, block length and other parameters.</div>

scholarly journals Age of Information Based URLLC-enabled UAV Wireless Communications System

2021 ◽  
pp. 1-1
Author(s):  
Chathuranga M. Wijerathna Basnayaka ◽  
Dushantha Nalin K. Jayakody ◽  
Zheng Chang
Keyword(s):  
Wireless Communications ◽  
Communications System ◽  
Age Of Information

scholarly journals On the Implementation of a Dynamic Direction Modulation System with Vector Modulators

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Edith Annette Cabrera-Hernández ◽  
Josep Parron ◽  
Alan Tennant
Keyword(s):  
Wireless Communications ◽  
Physical Layer Security ◽  
Physical Layer ◽  
Efficient Technique ◽  
Synthesis Methods ◽  
System Architectures ◽  
Flexible Framework ◽  
Communications System ◽  
Nonideal Behavior ◽  
Directional Modulation

Dynamic directional modulation (DDM) has already proven to be an efficient technique to achieve physical layer security in wireless communications. System architectures based on vector modulators provide a flexible framework to implement synthesis methods that allow us to obtain increased security and/or independent multichannel transmissions. However, the implementation of DDM with vector modulators requires an accurate calibration (amplitude and phase) of every component in the RF path. In this contribution, we study the sensitivity of the response of a DDM system based on commercial vector modulators showing how to correct the nonideal behavior of all the components thanks to the flexibility provided by the vector modulator.

Rail Car Tracking Device Selection and Power Consumption

2008 ◽  
Author(s):  
Robert Gray ◽  
Richard Grisier
Keyword(s):  
Wireless Communications ◽  
Power Consumption ◽  
Lithium Battery ◽  
Power Source ◽  
System Testing ◽  
Gps Technology ◽  
Source Selection ◽  
Will Power ◽  
Tracking Device ◽  
Communications System

Since its introduction, consumer GPS has made the tracking of critical items in the transportation chain more popular. Shipment of items via rail car is one link in the chain that serves to benefit from GPS technology. This paper discusses a wireless communications system suitable for tracking rail cars. In particular, the power source selection and system testing are described. The system was limited to one device and one power source, a battery. Findings show that the lithium battery selected will power the device for one to three years, depending on transmission activity. Recommended areas of additional research include: battery recharging techniques, effects of connecting sensors to the device, and investigating other communications devices as they become available.

Self Contained Adaptable Optical Wireless Communications System for Stroke Rate During Swimming

2013 ◽  
Vol 13 (8) ◽  
pp. 3144-3151 ◽  
Author(s):  
Rabee M. Hagem ◽  
Steven G. O'Keefe ◽  
Thomas Fickenscher ◽  
David Victor Thiel
Keyword(s):  
Wireless Communications ◽  
Stroke Rate ◽  
Optical Wireless ◽  
Optical Wireless Communications ◽  
Communications System

Design of the Wireless Communications System in the Nuclear Power Plants

2014 ◽  
Vol 494-495 ◽  
pp. 1902-1905
Author(s):  
Xiao Yan Gao
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Portable Devices ◽  
Network Technology ◽  
Wireless Technology ◽  
Power Station ◽  
Communications System

With the development of wireless network technology, wireless communication is widely used in entertainment, business, factory and other fields. But, for those nuclear power plants which are currently in service, wireless technology did not get fully used, some even in unused condition. Actually, wireless communication system can be used to provide wireless connection between computer and mobile/portable devices, and provide access to LAN system; it also can be used to transmit video and data for cameras and sensors; it can realize wireless expansion of MAIN PABX system, so to meet all kinds of Wireless communication requirements in Nuclear Power Station.

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