Results 21 to 30 of about 3,513,631 (178)
Physical Review A, 2023 A random access code (RAC) is a communication task in which the sender encodes a random message into a shorter one to be decoded by the receiver so that a randomly chosen character of the original message is recovered with some probability. Both the message and the character to be recovered are assumed to be uniformly distributed.
Gabriel Pereira Alves +2 more
openaire +2 more sources
Measurement-Adaptive Cellular Random Access Protocols [PDF]
, 2014 This work considers a single-cell random access channel (RACH) in cellular wireless networks. Communications over RACH take place when users try to connect to a base station during a handover or when establishing a new connection. Within the framework of
A. Ephremides +15 more
core +4 more sources
Purely antiferromagnetic magnetoelectric random access memory
Nature Communications, 2017 Magnetoelectric coupling allows switching of magnetic states via gate voltage pulses. Here the authors propose and demonstrate a purely antiferromagnetic magnetoelectric random access memory based on Cr2O3, reporting 50-fold reduction of writing ...
Tobias Kosub +10 more
doaj +1 more source
Fixed-Symbol Aided Random Access Scheme for Machine-to-Machine Communications
IEEE Access, 2019 The massiveness of devices in crowded Machine-to-Machine (M2M) communications brings new challenges to existing random-access (RA) schemes, such as heavy signaling overhead and severe access collisions.
Zhaoji Zhang, Ying Li, Lei Liu, Wei Hou
doaj +1 more source
NOMA-Based Random Access in mMTC XL-MIMO
IEEE Access, 2023 In machine-type communication (MTC), massive access attempts are generated and the massive MIMO is the key technology to support this demand. To support massive MTC (mMTC), the recent extra-large scale massive multiple-input multiple-output (XL-MIMO ...
Thiago Augusto Bruza Alves, Taufik Abrao
doaj +1 more source
Delay performance in random-access grid networks [PDF]
, 2013 We examine the impact of torpid mixing and meta-stability issues on the delay performance in wireless random-access networks. Focusing on regular meshes as prototypical scenarios, we show that the mean delays in an $L\times L$ toric grid with normalized ...
Borst, Sem C. +3 more
core +3 more sources
Grant-Free Uplink Transmission With Multi-Codebook-Based Sparse Code Multiple Access (MC-SCMA)
IEEE Access, 2019 In sparse code multiple access (SCMA)-based grant-free (GF) access, both user's channel and the selected SCMA codebook (CB) are considered as a transmission signature for multi-user detection (MUD). In conventional SCMA-based grant-free (GF) access where
Ameha Tsegaye Abebe, Chung G. Kang
doaj +1 more source
Modeling and Throughput Optimization of Multi-Gateway LoRaWAN
IEEE Access, 2023 Low power wide area network (LPWAN) technologies have become an integral part of Internet-of-Things (IoT) applications due to their ability to meet key requirements such as long range, low cost, massive device numbers, and low energy consumption.
Baoguo Yu +4 more
doaj +1 more source
Capacity analysis of reservation-based random access for broadband wireless access networks [PDF]
, 2009 —In this paper we propose a novel model for the capacity analysis on the reservation-based random multiple access system, which can be applied to the medium access control protocol of the emerging WiMAX technology.
Ni, Q, Staehle, D, Turlikov, A, Vinel, A
core +1 more source
Location-Based Unsourced Random Access
IEEE AccessWe propose a novel approach to Unsourced Random Access (URA) in which the encoding of each user’s message is associated with the user’s location.
Roshanak Soltani +3 more
doaj +1 more source