Results 61 to 70 of about 3,513,631 (178)
Research on the NB-IoT Random Access in LEO Satellite IoT
天地一体化信息网络, 2021 Narrowband internet of things (NB-IoT) technology is widely used in data communications for a large number of low-speed and low-power devices, but it is diff cult to provide services for remote areas that cannot be covered by terrestrial networks.With ...
Haodong LIU +4 more
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IEEE Open Journal of the Communications SocietyIn 5th generation (5G) beamforming networks, beam alignment is conducted in the random access process, where user equipment (UE) in different beam regions share the preambles according to the network configuration. The limited number of preambles results
Gangwoo Lee +2 more
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IEEE AccessThe swift progress of 6G cellular networks responds to the urgent demand for seamlessly integrating Internet of Things (IoT) devices on a large scale. Among various emerging technologies, grant-free non-orthogonal multiple access (GF-NOMA) emerges as a ...
Farooque Hassan Kumbhar +3 more
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Channel-Aware Multichannel Random Access for Energy-Limited Sensors and MTC Devices
IEEE Access, 2018 In machine-type communications (MTC) or wireless sensor networks (WSNs), since MTC devices or sensors have limited supply of energy, energy efficient transmission schemes are important.
Jinho Choi
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Applied Sciences, 2018 To support a massive number of connected cars, a novel channel access scheme for next-generation vehicle-to-anything (V2X) systems is proposed in this paper.
Jinsoo Ahn +2 more
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Random Access Protocols for Massive MIMO
, 2017 5G wireless networks are expected to support new services with stringent requirements on data rates, latency and reliability. One novel feature is the ability to serve a dense crowd of devices, calling for radically new ways of accessing the network ...
Björnson, Emil +4 more
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Pattern division random access (PDRA) scheme for mMIMO systems
Dianxin kexue, 2022 To enhance the massive machine-type communications (mMTC) random access (RA) performance, a pattern division random access (PDRA) scheme was proposed for massive multiple-input multiple-output (mMIMO) systems.In this scheme, the pilot contention space ...
Xiaoming DAI +5 more
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A pseudo random-access synchronous meteorological satellite system [PDF]
, 1971 Communications satellite system uses pseudo-random time frequency multiplexing technique for extracting real-time meteorological data from great number of isolated weather stations /data collection platforms/ situated randomly throughout the ...
Darcey, R. J., Martel, R. J.
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High-Throughput Random Access via Codes on Graphs [PDF]
, 2010 Recently, contention resolution diversity slotted ALOHA (CRDSA) has been introduced as a simple but effective improvement to slotted ALOHA. It relies on MAC burst repetitions and on interference cancellation to increase the normalized throughput of a ...
Chiani, Marco +2 more
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Performance Analysis of a Novel Hybrid S-ALOHA/TDMA Protocol for Beta Distributed Massive MTC Access
Sensors, 2017 Simultaneous random access of massive machine type communications (MTC) devices are expected to cause congestion in the radio access network. Not only the performance of MTC, but the coexisting human to human (H2H) communications would also degrade ...
Nannan Sui +3 more
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