Results 11 to 20 of about 464 (128)
Improving LoRaWAN Performance Using Reservation ALOHA [PDF]
Journal of Information Technology Management, 2020 LoRaWAN is one of the new and updated standards for IoT applications. However, the expected high density of peripheral devices for each gateway, and the absence of an operative synchronization mechanism between the gateway and peripherals, all of which ...
Dina M. Ibrahim
doaj +1 more source
Collision-aware distributed detection with population-splitting algorithms
EURASIP Journal on Wireless Communications and Networking, 2021 We consider the design of distributed detection algorithms for single-hop, single-channel wireless sensor networks in which sensor nodes send their local decisions to a fusion center (FC) by using a random access protocol.
Seksan Laitrakun
doaj +1 more source
International Journal of Distributed Sensor Networks, 2020 We consider the composite hypothesis testing problem of time-bandwidth-constrained distributed detection. In this scenario, the probability distribution of the observed signal when the event of interest is happening is unknown.
Seksan Laitrakun
doaj +1 more source
IEEE Access, 2023 In satellite Internet-of-Things (IoT) systems using the 920-MHz band Low Power Wide Area, available channels for each terminal are limited to avoid interference with terrestrial networks. Since this limitation depends on the location of the terminal, the
Kansuke Kumazawa +7 more
doaj +1 more source
Performance Evaluation of LoRaWAN for Green Internet of Things
IEEE Access, 2019 LoRa is a long-range, low power and single-hop wireless technology that has been envisioned for Internet of Things (IoT) applications having battery driven nodes.
Zulfiqar Ali +4 more
doaj +1 more source
IEEE Access, 2022 In this study, we investigate the use of low-altitude unmanned aerial vehicles (UAVs) in air-to-ground (A2G) communication networks, which still have various issues and challenges. In particular, the limited battery power of UAVs render their flight time
Junseung Lee +3 more
doaj +1 more source
Throughput‐delay tradeoff for opportunistic spectrum access in cognitive radio networks
IET Communications, Volume 17, Issue 18, Page 2053-2067, November 2023., 2023 The authors address the tradeoff between the throughput of cognitive radio network and the delay of secondary user (SU) under a reactive channel handoff based opportunistic spectrum access scenario. The handoff blocking‐then‐reaccess scheme is deeply analyzed.
Jing Zhang +4 more
wiley +1 more source
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract Near‐infrared adaptive optics as well as fringe tracking for coherent beam combination in optical interferometry require the development of high‐speed sensors. Because of the high speed, a large analog bandwidth is required. The short exposure times result in small signal levels which require noiseless detection.
Gert Finger +18 more
wiley +1 more source
Throughput Analysis of Large Wireless Networks with Regular Topologies
EURASIP Journal on Wireless Communications and Networking, 2007 The throughput of large wireless networks with regular topologies is analyzed under two medium-access control schemes: synchronous array method (SAM) and slotted ALOHA. The regular topologies considered are square, hexagon, and triangle.
Kezhu Hong, Yingbo Hua
doaj +2 more sources
Comparing Delay-Constrained ALOHA and CSMA: A Learning-Based Low-Complexity Approximate Approach
IEEE Open Journal of the Communications Society, 2021 Supporting delay-constrained traffic becomes more and more critical in multimedia communication systems, tactile Internet, networked control systems, and cyber-physical systems, etc. In delay-constrained traffic, each packet has a hard deadline.
Lei Deng +3 more
doaj +1 more source