On receiver diversity for grant-free based machine type communications
Sign Up to like & getrecommendations! Published in 2020 at "Ad Hoc Networks"
DOI: 10.1016/j.adhoc.2020.102245
Abstract: Abstract Grant-free access schemes are steadily gaining momentum for emerging machine type communications and internet of things applications. Relying on variations of the classical ALOHA protocol to allow a vast population of users share a… read more here.
Keywords: grant free; receiver diversity; type communications; machine type ... See more keywords
Grant-Free Uplink Transmission With Multi-Codebook-Based Sparse Code Multiple Access (MC-SCMA)
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2954492
Abstract: 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… read more here.
Keywords: access; multiple access; scma; grant free ... See more keywords
Grant-Free Non-Orthogonal Multiple Access With Multiple-Antenna Base Station and Its Efficient Receiver Design
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2956817
Abstract: This paper investigates an uplink grant-free non-orthogonal multiple access (NOMA) system with a multiple-antenna base station (BS), in which each user autonomously transmits its own data by multiplying its unique but non-orthogonal spreading sequence, namely… read more here.
Keywords: free non; access; non orthogonal; orthogonal multiple ... See more keywords
Enumeration and Identification of Active Users for Grant-Free NOMA Using Deep Neural Networks
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3224478
Abstract: In next-generation mobile radio systems, multiple access schemes will support a massive number of uncoordinated devices exhibiting sporadic traffic, transmitting short packets to a base station. Grant-free non-orthogonal multiple access (NOMA) has been introduced to… read more here.
Keywords: identification active; grant free; active users; enumeration identification ... See more keywords
On uplink non-orthogonal multiple access for 5g: opportunities and challenges
Sign Up to like & getrecommendations! Published in 2017 at "China Communications"
DOI: 10.1109/cc.2017.8246331
Abstract: In this paper, the concept of grantfree non-orthogonal multiple access (NOMA) for uplink data transmission is elaborated. NOMA in combination with grant-free can be applied to ultra reliability low latency communication (URLLC), massive machine type… read more here.
Keywords: non orthogonal; grant free; uplink non; multiple access ... See more keywords
Grant-Free Access for mMTC: A Performance Analysis Based on Number of Preambles, Repetitions, and Retransmissions
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2022.3149013
Abstract: Grant-free (GF) access is a multiple access mechanism being considered for supporting high user density in massive machine-type communication (mMTC). Since the GF schemes are predominantly contention based, a major challenge would be to handle… read more here.
Keywords: grant free; free access; number; analysis ... See more keywords
Enhancing Physical-Layer Security for IoT With Nonorthogonal Multiple Access Assisted Semi-Grant-Free Transmission
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2022.3193189
Abstract: Nonorthogonal multiple access (NOMA) assisted semi-grant-free transmission admits grant-free users to access the channels otherwise solely occupied by grant-based users, and has been recently attracting considerable attention in terms of accommodating massive connectivity and reducing… read more here.
Keywords: grant free; transmission; security; access ... See more keywords
Deep-Neural-Network-Aided Cross-Slot User Equipment Scheduling for Grant-Free Random Access
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2022.3196015
Abstract: Massive machine-type communications (mMTC) is an important scenario to support Internet of Things (IoT) services. However, the massiveness of user equipments (UEs) poses new challenges for existing grant-free random access (GF-RA) schemes, such as pilot… read more here.
Keywords: grant free; deep neural; random access; free random ... See more keywords
Design of Joint Device and Data Detection for Massive Grant-Free Random Access in LEO Satellite Internet of Things
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2022.3228730
Abstract: Recently, low-Earth orbit (LEO) satellite Internet of Things (IoT) has received considerable interests due to its global coverage for massive IoT devices distributed over a large area, especially in remote areas, e.g., ocean, desert, and… read more here.
Keywords: grant free; leo satellite; satellite internet; internet things ... See more keywords
G-SC-IRSA: Graph-Based Spatially Coupled IRSA for Age-Critical Grant-Free Massive Access
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2022.3232568
Abstract: In this article, we focus on a grant-free massive access setup and analyze its Age of Information (AoI), where a large number of user equipments (UEs) are randomly activated and attempt to transmit status update… read more here.
Keywords: grant free; massive access; age; free massive ... See more keywords
Variational Bayesian Inference Clustering-Based Joint User Activity and Data Detection for Grant-Free Random Access in mMTC
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2023.3234691
Abstract: Tailor-made for massive connectivity and sporadic access, grant-free random access has become a promising candidate access protocol for massive machine-type communications (mMTC). Compared with conventional grant-based protocols, grant-free random access skips the exchange of scheduling… read more here.
Keywords: grant free; random access; free random; access ... See more keywords