Results 1 to 10 of about 464 (128)

Slotted ALOHA on LoRaWAN-Design, Analysis, and Deployment [PDF]

open access: yesSensors, 2019
LoRaWAN is one of the most promising standards for long-range sensing applications. However, the high number of end devices expected in at-scale deployment, combined with the absence of an effective synchronization scheme, challenge the scalability of ...
Davide Brunelli   +2 more
exaly   +4 more sources

Airborne-Platform-Assisted Transmission and Control Separation for Multiple Access in Integrated Satellite–Terrestrial Networks [PDF]

open access: yesSensors
Currently, the primary random access protocol for satellite communications is Irregular Repetition Slotted ALOHA (IRSA). This protocol leverages interference cancellation and burst repetition based on probabilistic distributions, achieving up to 80 ...
Chaoran Huang   +4 more
doaj   +2 more sources

Secured operating regions of Slotted ALOHA in the presence of interfering signals from other networks and DoS attacking signals

open access: yesJournal of Advanced Research, 2011
It is expected that many networks will be providing services at a time in near future and those will also produce different interfering signals for the current Slotted ALOHA based systems.
Hussein Mouftah, Jahangir Sarker
exaly   +3 more sources

LC-DFSA: Low Complexity Dynamic Frame Slotted Aloha Anti-Collision Algorithm for RFID System [PDF]

open access: yesSensors, 2019
With the rapid development of the Internet of Things (IoT), the radio frequency identification (RFID) system becomes increasingly important. Tag identification is a basic problem of the RFID system, whose purpose is to inventory tags.
Zhaozhe Jiang   +3 more
doaj   +2 more sources

On the Interplay between Deadline-Constrained Traffic and the Number of Allowed Retransmissions in Random Access Networks [PDF]

open access: yesEntropy
In this paper, a network comprising wireless devices equipped with buffers transmitting deadline-constrained data packets over a slotted-ALOHA random-access channel is studied.
Nikolaos Nomikos   +4 more
doaj   +2 more sources

Enhanced performance of secondary surveillance radar system in dense UAV environments using CDMA techniques

open access: yesIET Radar, Sonar & Navigation
In future battlefield scenarios, the high density of platforms often leads to multiple responses from existing secondary surveillance radar (SSR) systems, causing collision interference of response signals in the time domain. The frame slotted ALOHA (FSA)
Haonan Chen, Rui Guo, Zengping Chen
doaj   +2 more sources

Learning uplinks and downlinks transmissions in RF-charging IoT networks [PDF]

open access: yesScientific Reports
This paper considers uplink and downlink transmissions in a network with radio frequency-powered Internet of Things sensing devices. Unlike prior works, for uplinks, these devices use framed slotted Aloha for channel access.
Yiwei Li   +3 more
doaj   +2 more sources

Evaluasi Coded Random Access untuk Visible Light Communication pada Model Kanal Non-Line Of Sight

open access: yesJurnal Elkomika, 2022
ABSTRAK Penggunaan Non-Orthogonal Multiple Access (NOMA) pada sistem komunikasi dapat memberi kebebasan bagi user untuk mengirimkan informasi secara bersamaan tanpa harus memperebutkan timeslot ataupun frekuensi.
BRIAN PAMUKTI   +2 more
doaj   +1 more source

An Uplink Random Access Scheme Based on ALOHA System Assisted by Gain Division Multiple Access

open access: yesIEEE Access, 2023
Gain division multiple access (GDMA) is a non-orthogonal multiple access (NOMA) technique for uplink communications. In GDMA, the receiver employs both the magnitudes and phases of channel gains associated to the users to separate users.
Mao-Chao Lin   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy