On Integrated Access and Backhaul Networks: Current Status and Potentials

Madapatha, Charitha; Makki, Behrooz; Fang, Chao; Teyeb, Oumer; Dahlman, Erik; Alouini, Mohamed‐Slim; Svensson, Tommy

doi:10.1109/ojcoms.2020.3022529

“…For IAB networks, 3GPP has agreed on topology adaptation in order to reconfigure the backhaul to mitigate link blockage or perform load balancing [20]. A Central Unit (CU) can receive feedback on the traffic load and backhaul link quality metrics, gaining awareness of the overall IAB topology and then calculate the optimal configuration.…”

Section: Related Workmentioning

confidence: 99%

A Randomized Greedy Heuristic for Steerable Wireless Backhaul Reconfiguration

Skorin-Kapov¹,

Santos

²

,

Ghazzai

³

et al. 2021

Electronics

0

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In this paper, we consider the reconfiguration of wireless backhaul networks with mechanically steerable antennas in the presence of changing traffic demands. Reconfiguration requires the scheduling and coordination of several operations, including antenna alignment and link establishment/removal, with minimal disruption to existing user traffic. Previously, we proposed a Mixed Integer Linear Program (MILP) to orchestrate such reconfiguration with minimal packet loss. While the MILP solves the problem optimally for a limited number of discrete reconfiguration time slots, it does not scale well. In this paper, we propose an iterative randomized greedy algorithm to obtain suboptimal solutions in reduced time. The algorithm schedules the reconfiguration of wireless links by ranking them according to a set of attributes with associated weights and selecting them according to a randomized greedy function. Results on six different network scenarios indicate that the proposed algorithm can achieve good quality solutions in significantly less time. Furthermore, by extending the reconfiguration time beyond the maximum number of time slots solvable by the MILP, the proposed heuristic can obtain superior solutions for some problem instances. The number of iterations of the algorithm can be tuned for its applicability in both offline and online planning scenarios.

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“…IAB network has gained much attraction from research and industry alike as it enables fully integrated wireless access and backhaul connectivity while availing of large swaths of mmWave spectrum. In [6], the authors summarize key aspects of Release 16 specifications and outline Release 17 IAB enhancements. Using a finite stochastic geometry model for both -IAB nodes and UEs, they provide performance analysis of IAB nodes in both dense and suburban areas.…”

Section: A Related Work and Our Contributionmentioning

confidence: 99%

Delay-oriented IAB Topology Optimisation

McMenamy¹,

Haustein²,

Macaluso³

2021

Preprint

0

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Integrated access and bachhaul (IAB), introduced in 3GPP Release 16, is expected to be one of the main enablers for dense deployments in mmWave spectrum. The IAB architecture brings in topology changes, which impact network-related aspects, such as ensuring robust routing of traffic and load-balancing. While an IAB network should be transparent to the UE, its topology design may affect the end-user performance. Of particular importance in these first releases, hence, is to determine and evaluate optimal IAB topologies. This paper addresses optimal organisation of IAB nodes by considering a number of inter-connected aspects, including maximum number of hops, path-length, load balancing between the IAB-donors and traffic demand in the access network. In that, we focus on one of the parameters most sensitive to the architectural changes in the network - delay. Our analysis relies on the connectivity graph obtained by considering some practical aspects of sectorised beamforming using real mmWave antenna patterns.

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“…The first formulation addresses the aspect of load-balancing and is given by equations (2)(3)(4)(5)(6). The combination of the objective function Eq.…”

Section: B Iab Nodes Optimal Organisationmentioning

confidence: 99%

Delay-oriented IAB Topology Optimisation

McMenamy¹,

Haustein²,

Macaluso³

2021

Preprint

0

View full text Add to dashboard Cite

Integrated access and bachhaul (IAB), introduced in 3GPP Release 16, is expected to be one of the main enablers for dense deployments in mmWave spectrum. The IAB architecture brings in topology changes, which impact network-related aspects, such as ensuring robust routing of traffic and load-balancing. While an IAB network should be transparent to the UE, its topology design may affect the end-user performance. Of particular importance in these first releases, hence, is to determine and evaluate optimal IAB topologies. This paper addresses optimal organisation of IAB nodes by considering a number of inter-connected aspects, including maximum number of hops, path-length, load balancing between the IAB-donors and traffic demand in the access network. In that, we focus on one of the parameters most sensitive to the architectural changes in the network - delay. Our analysis relies on the connectivity graph obtained by considering some practical aspects of sectorised beamforming using real mmWave antenna patterns.

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On Integrated Access and Backhaul Networks: Current Status and Potentials

Cited by 100 publications

References 39 publications

A Randomized Greedy Heuristic for Steerable Wireless Backhaul Reconfiguration

A Randomized Greedy Heuristic for Steerable Wireless Backhaul Reconfiguration

Delay-oriented IAB Topology Optimisation

Delay-oriented IAB Topology Optimisation

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