Results 41 to 50 of about 10,351,223 (373)
Spatially-Coupled Random Access on Graphs [PDF]
, 2012 In this paper we investigate the effect of spatial coupling applied to the recently-proposed coded slotted ALOHA (CSA) random access protocol. Thanks to the bridge between the graphical model describing the iterative interference cancelation process of ...
Chiani, Marco +4 more
core +1 more source
Resilience of Quantum Random Access Memory to Generic Noise [PDF]
PRX Quantum, 2020 Quantum random access memory (QRAM)--memory which stores classical data but allows queries to be performed in superposition--is required for the implementation of numerous quantum algorithms.
Connor T. Hann +3 more
semanticscholar +1 more source
Multi-Channel Random Access with Replications [PDF]
, 2017 This paper considers a class of multi-channel random access algorithms, where contending devices may send multiple copies (replicas) of their messages to the central base station.
Andreev, Sergey +3 more
core +2 more sources
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
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
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
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
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
Low-latency random access in wireless networks
ICT Express, 2021 For fast access to the cell, we propose an enhanced random access scheme exploiting multiple transmissions of random access preambles and random access responses.
Eunkyung Kim, Heesoo Lee
doaj +1 more source