Hierarchical Scheduling for Suppression of Fronthaul Delay in C-RAN with Dynamic Functional Split

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00350042" target="_blank" >RIV/68407700:21230/21:00350042 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/MCOM.001.2000697" target="_blank" >https://doi.org/10.1109/MCOM.001.2000697</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/MCOM.001.2000697" target="_blank" >10.1109/MCOM.001.2000697</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hierarchical Scheduling for Suppression of Fronthaul Delay in C-RAN with Dynamic Functional Split

Popis výsledku v původním jazyce

The cloud radio access network (C-RAN) can potentially reduce a network's deployment cost and energy consumption. However, a connection between a centralized baseband unit and distributed remote radio heads, known as a fronthaul, introduces an additional delay to both control and user planes. This delay is a serious limiting factor for radio resource management functionalities, such as scheduling, because the radio resources are assigned to users according to outdated channel quality information if the fronthaul delay is non-zero. This article provides an overview of existing scheduling approaches suitable for C-RAN and identifies their potential limitations. Based on these limitations, we outline a framework for hierarchical scheduling. The hierarchical scheduling mitigates a negative impact of the fronthaul delay on the throughput of non-cell-edge users and enables efficient retransmission of erroneous data. Besides, cell-edge users can still benefit from interference mitigation techniques requiring centralized control. We compare individual scheduling approaches and show that hierarchical scheduling increases the network throughput (by up to 26 percent) and reduces the number of retransmissions with respect to the existing solutions.

Název v anglickém jazyce

Hierarchical Scheduling for Suppression of Fronthaul Delay in C-RAN with Dynamic Functional Split

Popis výsledku anglicky

The cloud radio access network (C-RAN) can potentially reduce a network's deployment cost and energy consumption. However, a connection between a centralized baseband unit and distributed remote radio heads, known as a fronthaul, introduces an additional delay to both control and user planes. This delay is a serious limiting factor for radio resource management functionalities, such as scheduling, because the radio resources are assigned to users according to outdated channel quality information if the fronthaul delay is non-zero. This article provides an overview of existing scheduling approaches suitable for C-RAN and identifies their potential limitations. Based on these limitations, we outline a framework for hierarchical scheduling. The hierarchical scheduling mitigates a negative impact of the fronthaul delay on the throughput of non-cell-edge users and enables efficient retransmission of erroneous data. Besides, cell-edge users can still benefit from interference mitigation techniques requiring centralized control. We compare individual scheduling approaches and show that hierarchical scheduling increases the network throughput (by up to 26 percent) and reduces the number of retransmissions with respect to the existing solutions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20203 - Telecommunications

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IEEE Communications Magazine

ISSN

0163-6804

e-ISSN

1558-1896

Svazek periodika

59

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

95-101

Kód UT WoS článku

000652058200015

EID výsledku v databázi Scopus

2-s2.0-85106531693