6 research outputs found
Improved User Tracking in 5G Millimeter Wave Mobile Networks via Refinement Operations
The millimeter wave (mmWave) frequencies offer the availability of huge
bandwidths to provide unprecedented data rates to next-generation cellular
mobile terminals. However, directional mmWave links are highly susceptible to
rapid channel variations and suffer from severe isotropic pathloss. To face
these impairments, this paper addresses the issue of tracking the channel
quality of a moving user, an essential procedure for rate prediction, efficient
handover and periodic monitoring and adaptation of the user's transmission
configuration. The performance of an innovative tracking scheme, in which
periodic refinements of the optimal steering direction are alternated to
sparser refresh events, are analyzed in terms of both achievable data rate and
energy consumption, and compared to those of a state-of-the-art approach. We
aim at understanding in which circumstances the proposed scheme is a valid
option to provide a robust and efficient mobility management solution. We show
that our procedure is particularly well suited to highly variant and unstable
mmWave environments.Comment: Accepted for publication to the 16th IEEE Annual Mediterranean Ad Hoc
Networking Workshop (MED-HOC-NET), Jun. 201
Smart Beam Management for Vehicular Networks Using ML
[EN] The mmWave frequencies will be widely used in future
vehicular communications. At these frequencies, the radio
channel becomes much more vulnerable to slight changes in the
environment like motions of the device, reflections or blockage. In
high mobility vehicular communications the rapidly changing
vehicle environments and the large overheads due to frequent
beam training are the critical disadvantages in developing these
systems at mmWave frequencies. Hence, smart beam
management procedures are desired to establish and maintain the
radio channels. In this paper, we propose that using the positions
and respective velocities of the vehicles in the dynamic selection
of the beam pair, and then adapting to the changing environments
using ML algorithms, can improve both network performance
and communication stability in high mobility vehicular
communications.This work was supported by the Spanish Comision
Interministerial de Ciencia y Tecnologia (CICYT) under
projects TEC2016-78028-C3-1-P and MDM2016-O6OO,
Catalan Research Group 2017 SGR 21, and Industrial
Doctorate programme (2018-DI-084) of Generalitat de
Catalunya.Bharath-Reddy, G.; Montero, L.; Perez-Romero, J.; Molins-Benlliure, J.; Ferrando Bataller, M.; Molina, J.; Romeu, J.... (2021). Smart Beam Management for Vehicular Networks Using ML. Íñigo Cuiñas Gómez. 1-4. http://hdl.handle.net/10251/1910661
Smart Pattern V2I Handover Based on Machine Learning Vehicle Classification
The mmwave frequencies will be widely used in future vehicular communications. At these frequencies, the radio channel becomes much more vulnerable to slight changes in the environment like motions of the device, reflections or blockage. In high mobility vehicular communications the rapidly changing vehicle environments and the large overheads due to frequent beam training are the critical disadvantages in developing these systems at mmwave frequencies. Hence, smart beam management procedures are desired to establish and maintain the radio channels. In this thesis, we propose that using the positions and respective velocities of the vehicles in the dynamic selection of the beam pair, and then adapting to the changing environments using machine learning algorithms, can improve both network performance and communication stability in high mobility vehicular communications
A Tutorial on Beam Management for 3GPP NR at mmWave Frequencies
The millimeter wave (mmWave) frequencies offer the availability of huge
bandwidths to provide unprecedented data rates to next-generation cellular
mobile terminals. However, mmWave links are highly susceptible to rapid channel
variations and suffer from severe free-space pathloss and atmospheric
absorption. To address these challenges, the base stations and the mobile
terminals will use highly directional antennas to achieve sufficient link
budget in wide area networks. The consequence is the need for precise alignment
of the transmitter and the receiver beams, an operation which may increase the
latency of establishing a link, and has important implications for control
layer procedures, such as initial access, handover and beam tracking. This
tutorial provides an overview of recently proposed measurement techniques for
beam and mobility management in mmWave cellular networks, and gives insights
into the design of accurate, reactive and robust control schemes suitable for a
3GPP NR cellular network. We will illustrate that the best strategy depends on
the specific environment in which the nodes are deployed, and give guidelines
to inform the optimal choice as a function of the system parameters.Comment: 22 pages, 19 figures, 10 tables, published in IEEE Communications
Surveys and Tutorials. Please cite it as M. Giordani, M. Polese, A. Roy, D.
Castor and M. Zorzi, "A Tutorial on Beam Management for 3GPP NR at mmWave
Frequencies," in IEEE Communications Surveys & Tutorials, vol. 21, no. 1, pp.
173-196, First quarter 201