Results 101 to 110 of about 6,711 (206)

Direct-to-Satellite IoT Slotted Aloha Systems with Multiple Satellites and Unequal Erasure Probabilities. [PDF]

open access: yesSensors (Basel), 2021
Tondo FA   +4 more
europepmc   +1 more source

Multi-Agent Quantum Reinforcement Learning for Adaptive Transmission in NOMA-Based Irregular Repetition Slotted ALOHA

open access: yesIEEE Open Journal of the Communications Society
This paper proposes a Multi-Agent Quantum Deep Reinforcement Learning (MA-QDRL) framework to optimize uplink access in Irregular Repetition Slotted ALOHA with Non-Orthogonal Multiple Access (IRSA-NOMA) systems under practical constraints such as finite ...
Won Jae Ryu, Jae-Min Lee, Dong-Seong Kim
doaj   +1 more source

ALOHA With Collision Resolution(ALOHA-CR): Theory and Software Defined Radio Implementation

open access: yes, 2009
A cross-layer scheme, namely ALOHA With Collision Resolution (ALOHA-CR), is proposed for high throughput wireless communications in a cellular scenario.
Dandekar, Kapil R.   +3 more
core   +2 more sources

Distributed Transmission Probability Control in Fading Channel with State Information

open access: yesInternational Journal of Distributed Sensor Networks, 2015
A wireless system consisting of a finite number of heterogeneous users transmitting packets over a slotted ALOHA Rayleigh-fading channel is investigated in this paper.
S. Xie, K.S. Low, E. Gunawan
doaj   +1 more source

Stability Region of a Slotted Aloha Network with K-Exponential Backoff

open access: yes, 2014
Stability region of random access wireless networks is known for only simple network scenarios. The main problem in this respect is due to interaction among queues.
Ashtiani, Farid, Farhadi, Farzaneh
core  

Stability Analysis of Hybrid ALOHA

open access: yesEURASIP Journal on Wireless Communications and Networking, 2010
We perform stability analysis of a recently proposed MAC protocol, hybrid ALOHA, based on the multipacket reception (MPR) model. Hybrid ALOHA distinguishes from conventional slotted ALOHA by allowing conditional collision-free channel estimation and ...
Wang Huahui, Li Tongtong
doaj  

The Local Delay and the Throughput in Cooperative Cognitive Radio Ad Hoc Networks

open access: yesIEEE Access, 2019
Cognitive radio ad hoc network is a framework which combines cognitive technique and ad hoc network. How to improve the performance of that network has always been a popular research for the past decades.
Jing Gao, Yinghui Zhang
doaj   +1 more source

Adaptive algorithms for improving the throughput in an indoor mobile s-aloha ds-cdma system [PDF]

open access: yes, 1996
This paper presents a novel Adaptive DSCDMA Slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic load values below the ...
Agustí Comes, Ramon   +1 more
core  

Interference Calculation in Asynchronous Random Access Protocols using Diversity

open access: yes, 2015
The use of Aloha-based Random Access protocols is interesting when channel sensing is either not possible or not convenient and the traffic from terminals is unpredictable and sporadic.
Meloni, Alessio, Murroni, Maurizio
core   +1 more source

BIS:an RFID anti-collision algorithm minimizing the cost of empty slots

open access: yesTongxin xuebao, 2009
A novel ALOHA-based medium access control(MAC) protocol, BIS, was proposed, in which the time consumption of the empty slots had been largely reduced through empty slot scanning and dynamic frame size adjustment.According to the simulation results, the ...
WANG Zhong-xiang   +3 more
doaj   +2 more sources

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