Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul
Integrated access and backhaul (IAB) network consists of base station (BS), relay nodes (RNs), and user-equipments (UEs), where BS and RNs exchange UE data via wireless in-band backhaul while sharing the same frequency-time resources with access links. In this paper, a flexible time-division-duplex...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9257462/ |
| _version_ | 1818433295929573376 |
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| author | Praneeth Jayasinghe Antti Tolli Jarkko Kaleva Matti Latva-Aho |
| author_facet | Praneeth Jayasinghe Antti Tolli Jarkko Kaleva Matti Latva-Aho |
| author_sort | Praneeth Jayasinghe |
| collection | DOAJ |
| description | Integrated access and backhaul (IAB) network consists of base station (BS), relay nodes (RNs), and user-equipments (UEs), where BS and RNs exchange UE data via wireless in-band backhaul while sharing the same frequency-time resources with access links. In this paper, a flexible time-division-duplex (TDD)-based IAB network is considered where RNs and BS are assigned to distinct uplink (UL) or downlink (DL) transmission modes to mitigate conventional half-duplex (HD) loss at RNs. An iterative beamformer design is proposed to manage the resulting cross-channel interference and to allocate wireless backhaul and access resources jointly over two consecutive data delivery intervals required for communications between the BS and UEs through HD RNs. Dynamic traffic behavior is handled via weighted queue minimization objective, and user-specific UL/DL queues are also introduced at RNs to guarantee reliable end-to-end data delivery. Bi-directional forward-backward training via spatially precoded over-the-air pilot signaling is employed to allow decentralized beamformer design across all the nodes. A novel user allocation method is proposed to assign UEs to BS or RNs based only on long-term channel statistics and some practical IAB limitations. The numerical examples illustrate the superior system performance of the considered flexible IAB in comparison to the conventional HD relaying system. |
| first_indexed | 2024-12-14T16:18:50Z |
| format | Article |
| id | doaj.art-3bd1e1918bd64ff299791e3569e3e571 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T16:18:50Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-3bd1e1918bd64ff299791e3569e3e5712022-12-21T22:54:51ZengIEEEIEEE Access2169-35362020-01-01820553420554910.1109/ACCESS.2020.30378149257462Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and BackhaulPraneeth Jayasinghe0https://orcid.org/0000-0002-5978-0350Antti Tolli1https://orcid.org/0000-0001-6219-9770Jarkko Kaleva2Matti Latva-Aho3https://orcid.org/0000-0002-6261-0969Center for Wireless Communications, University of Oulu, Oulu, FinlandCenter for Wireless Communications, University of Oulu, Oulu, FinlandSolmu Technologies Oy, Oulu, FinlandCenter for Wireless Communications, University of Oulu, Oulu, FinlandIntegrated access and backhaul (IAB) network consists of base station (BS), relay nodes (RNs), and user-equipments (UEs), where BS and RNs exchange UE data via wireless in-band backhaul while sharing the same frequency-time resources with access links. In this paper, a flexible time-division-duplex (TDD)-based IAB network is considered where RNs and BS are assigned to distinct uplink (UL) or downlink (DL) transmission modes to mitigate conventional half-duplex (HD) loss at RNs. An iterative beamformer design is proposed to manage the resulting cross-channel interference and to allocate wireless backhaul and access resources jointly over two consecutive data delivery intervals required for communications between the BS and UEs through HD RNs. Dynamic traffic behavior is handled via weighted queue minimization objective, and user-specific UL/DL queues are also introduced at RNs to guarantee reliable end-to-end data delivery. Bi-directional forward-backward training via spatially precoded over-the-air pilot signaling is employed to allow decentralized beamformer design across all the nodes. A novel user allocation method is proposed to assign UEs to BS or RNs based only on long-term channel statistics and some practical IAB limitations. The numerical examples illustrate the superior system performance of the considered flexible IAB in comparison to the conventional HD relaying system.https://ieeexplore.ieee.org/document/9257462/Coordinated beamformingflexible and dynamic TDDintegrated access and backhaulweighted queue minimization |
| spellingShingle | Praneeth Jayasinghe Antti Tolli Jarkko Kaleva Matti Latva-Aho Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul IEEE Access Coordinated beamforming flexible and dynamic TDD integrated access and backhaul weighted queue minimization |
| title | Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul |
| title_full | Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul |
| title_fullStr | Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul |
| title_full_unstemmed | Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul |
| title_short | Traffic Aware Beamformer Design for Flexible TDD-Based Integrated Access and Backhaul |
| title_sort | traffic aware beamformer design for flexible tdd based integrated access and backhaul |
| topic | Coordinated beamforming flexible and dynamic TDD integrated access and backhaul weighted queue minimization |
| url | https://ieeexplore.ieee.org/document/9257462/ |
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