Fast-RAT Scheduling in a 5G Multi-RAT Scenario

Monteiro, Victor Farias; Ericson, M.; Cavalcanti, Francisco R. P.

doi:10.1109/mcom.2017.1601094

Cited by 19 publications

(18 citation statements)

References 10 publications

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“…In addition, with different physical layer configurations among slices, the widely used algorithms and signal processing procedures might be fundamentally affected, such as channel equalization/ estimation, random access and synchronization, etc. Note that some of the current researches on RAN slicing focus on the medium access control (MAC) layer scheduling [27], [28], which is different from the work investigated in this paper. In general, RAN slicing on MAC layer scheduling need to consider to aggregate multiple radio access technologies (RATs) (e.g., 802.11 and LTE, etc.)…”

mentioning

confidence: 75%

Mixed-Numerology Signals Transmission and Interference Cancellation for Radio Access Network Slicing

Yang

Zhang

Onireti

et al. 2020

IEEE Trans. Wireless Commun.

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A clear understanding of mixed-numerology signals multiplexing and isolation in the physical layer is of importance to enable spectrum efficient radio access network (RAN) slicing, where the available access resource is divided into slices to cater to services/users with optimal individual design. In this paper, a RAN slicing framework is proposed and systematically analyzed from the physical layer perspective. According to the baseband and radio frequency (RF) configurations imparities among slices, we categorize four scenarios and elaborate on the numerology relationships of slices configurations. By considering the most generic scenario, system models are established for both uplink and downlink transmissions. Besides, a low out of band emission (OoBE) waveform is implemented in the system for the sake of signal isolation and inter-service/slice-band-interference (ISBI) mitigation. We propose two theorems as the basis of algorithms design in the established system, which generalize the original circular convolution property of discrete Fourier transform (DFT). Moreover, ISBI cancellation algorithms are proposed based on a collaboration detection scheme, where joint slices signal models are implemented. The framework proposed in the paper establishes a foundation to underpin extremely diverse use cases in 5G that implement on a common infrastructure.

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mentioning

confidence: 75%

Mixed-Numerology Signals Transmission and Interference Cancellation for Radio Access Network Slicing

Yang

Zhang

Onireti

et al. 2020

IEEE Trans. Wireless Commun.

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“…In contrast, users using DC can potentially consume resources and benefit from all access points at the same time. Monteiro et al [18] compared normal DC and fast switching. The authors use the Reference Signal Received Quality (RSRQ) metric to quickly switch from one RAT to another, therefore allowing a user to always benefit from the best RAT.…”

Section: Multi-connectivitymentioning

confidence: 99%

“…Therefore, from Eqs. (18) and 20, we can express the energy efficiency of MC as a bounded value such as:…”

Section: Upper Boundmentioning

confidence: 99%

“…It is an extension of dual connectivity, already present in LTE, to more than two simultaneous links [16]. Dual connectivity and multi-connectivity have been showed to increase the throughput and reliability for the end users [17][18][19]. However, little attention has been given to the energy consumption and energy efficiency of multi-connectivity, both from the end user and the cellular infrastructure's perspective.…”

Section: Introductionmentioning

confidence: 99%

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Energy efficient multi-connectivity algorithms for ultra-dense 5G networks

et al. 2019

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Two radio air interfaces, Evolved-LTE and New Radio, coexist in new 5G systems. New Radio operates in the millimeter band and provides a better bandwidth, but the higher frequencies also imply worse radio conditions. Multi-connectivity, a feature of 5G that allows users to connect to more than one base station simultaneously, can offer the advantages of both interfaces. In this paper, we investigate how multi-connectivity can improve user reliability and the system's energy efficiency. Five algorithms for secondary cell association are presented and evaluated. We show a decrease in the radio link failure rate of up to 50% at high speeds and improvements of the energy efficiency of up to 20% at low speeds.

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“…Considering the LTE-NR integration, which further complicates the problem due to intrinsic characteristics expected for the 5G channel [8], the authors in [19] proposed a DC protocol with the objective of allowing UEs to have uninterrupted connection to a LTE MeNB and switching the connection to NR SeNBs. In [20], the authors analyzed how to improve the QoS in LTE-NR multi-RAT scenarios by comparing different channel measurement metrics. The authors concluded that metrics related to signal quality should be prioritized over metrics only related to signal strength.…”

Section: A Ue-cell Associationmentioning

confidence: 99%

Dual Connectivity for LTE-NR Cellular Networks: Challenges and Open Issues

Antonioli

Parente²,

Silva³

et al. 2018

JCIS

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The Dual Connectivity (DC) technology has gained a lot of momentum in the LTE Release 12 as a means to enhance the per-user throughput and provide mobility robustness. Some studies in the literature have discussed the interworking between the LTE and the air interface of the upcoming Fifth Generation (5G) in a DC scenario. That integration may provide some benefits to meet the high throughput, reliability and availability requirements of the 5G networks. This work firstly presents a brief overview of the DC technology considering the integration between 4G e 5G. Then, we highlight some open issues and challenges for future investigation involving Radio Resource Management (RRM) in such a scenario, which includes: (i) user-cell association, (ii) interaction between base stations and (iii) resource allocation. After that, we propose an extension of a utility-based resource allocation algorithm for DC scenarios. Finally, a performance evaluation is conducted in multi-Radio Access Technology (RAT) LTE-NR scenarios considering the bearer split configuration of the DC technology, where the gains provided by the proposed algorithm are demonstrated.

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Fast-RAT Scheduling in a 5G Multi-RAT Scenario

Cited by 19 publications

References 10 publications

Mixed-Numerology Signals Transmission and Interference Cancellation for Radio Access Network Slicing

Mixed-Numerology Signals Transmission and Interference Cancellation for Radio Access Network Slicing

Energy efficient multi-connectivity algorithms for ultra-dense 5G networks

Dual Connectivity for LTE-NR Cellular Networks: Challenges and Open Issues

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