Detail publikace

Delay-Aware Link Scheduling in IAB Networks with Dynamic User Demands

SADOVAYA, Y. VIKHROVA, O. MAO, W. YEH, S. SEMIARI, O. NIKOPOUR, H. TALWAR, S. ANDREEV, S.

Originální název

Delay-Aware Link Scheduling in IAB Networks with Dynamic User Demands

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Integrated Access and Backhaul (IAB) is a costefficient network densification technology for improving the coverage and capacity of the millimeter-wave (mmWave) cellular networks. In IAB systems, user traffic is forwarded to/from the wired base station by one or more relay stations, known as IAB nodes. Due to the multi-hop relaying, these systems may be subject to large packet delays and poor performance when the load is unevenly distributed among nodes. Addressing this limitation via delay-aware access and backhaul link scheduling in IAB networks is challenging due to potentially large network scale, complex topology, half-duplex, and interference constraints. In this paper, the topical link scheduling problem is formulated as a Markov decision problem (MDP) for a single-donor IAB system with a general topology that allows for users with different delay requirements and traffic dynamics. The proposed link scheduling strategy jointly optimizes (i) user traffic routing and (ii) multiplexing of access and backhaul links under half-duplex constraints and non-negligible interference that may arise in dense IAB systems even with high beam directionality. To address the complexity of our formulated MDP, we consider several approximation methods, namely, Q-learning, Monte Carlo Tree Search (MCTS), and genetic algorithms (GAs). Then, we propose a customized version of the GA, which provides the preferred optimality-complexity trade-off and offers a 15% packet delay reduction as compared to the state-of-the-art backpressure algorithm.

Klíčová slova

IAB;millimeter-wave;link scheduling;routing;half-duplex constraint;interference;user dynamics

Autoři

SADOVAYA, Y.; VIKHROVA, O.; MAO, W.; YEH, S.; SEMIARI, O.; NIKOPOUR, H.; TALWAR, S.; ANDREEV, S.

Vydáno

21. 6. 2024

Nakladatel

IEEE

ISSN

1939-9359

Periodikum

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

Ročník

73

Číslo

10

Stát

Spojené státy americké

Strany od

15125

Strany do

15139

Strany počet

17

URL

https://ieeexplore.ieee.org/document/10568354/

Plný text v Digitální knihovně

http://hdl.handle.net/11012/249919

BibTex

@article{BUT189106,
  author="Yekaterina {Sadovaya} and Olga {Vikhrova} and Wei {Mao} and Shu-Ping {Yeh} and Omid {Semiari} and Hosein {Nikopour} and Shilpa {Talwar} and Sergey {Andreev}",
  title="Delay-Aware Link Scheduling in IAB Networks with Dynamic User Demands",
  journal="IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY",
  year="2024",
  volume="73",
  number="10",
  pages="15125--15139",
  doi="10.1109/TVT.2024.3409179",
  issn="1939-9359",
  url="https://ieeexplore.ieee.org/document/10568354/"
}