Cell-Free mMIMO Systems with Dynamic TDD

Hanwoong Kim; Hakkeon Lee; Taehyung Kim; Daesik Hong

doi:10.1109/VTC2022-Spring54318.2022.9861013

Cell-Free mMIMO Systems with Dynamic TDD

Hanwoong Kim, Hakkeon Lee, Taehyung Kim, Daesik Hong

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Cell-free massive multi-input multi-output (CF-mMIMO) systems assume that a single central processing unit (CPU) communicates with a large number of user equipments (UEs) using the same time-frequency resources. However, allocating the same frame configuration to all the UEs makes it difficult to meet the traffic demands of each individual UE. In this paper, we propose using dynamic-time division duplex (D-TDD) in CF-mMIMO systems. To mitigate the cross-link interference (CLI), we propose a new UE-grouping algorithm. Simulation results show that the implementation of D-TDD reduces the median value of the UL packet delay and the DL packet delay by up to 75% and 30% respectively. Furthermore, the proposed UE-grouping reduces the average packet delay by 50% compared to static-TDD (S-TDD).

Original language	English
Title of host publication	2022 IEEE 95th Vehicular Technology Conference - Spring, VTC 2022-Spring - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781665482431
DOIs	https://doi.org/10.1109/VTC2022-Spring54318.2022.9861013
Publication status	Published - 2022
Event	95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring - Helsinki, Finland Duration: 2022 Jun 19 → 2022 Jun 22

Publication series

Name	IEEE Vehicular Technology Conference
Volume	2022-June
ISSN (Print)	1550-2252

Conference

Conference	95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring
Country/Territory	Finland
City	Helsinki
Period	22/6/19 → 22/6/22

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work was supported by Institute of Information & communications Technology Planning Evaluation (IITP) grant funded by the Korea government (MSIT) (No. 2021-0-00973, Development of next-generation wireless modem technology (Post-OFDM)).

Publisher Copyright:
© 2022 IEEE.

All Science Journal Classification (ASJC) codes

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Access to Document

10.1109/VTC2022-Spring54318.2022.9861013

Cite this

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title = "Cell-Free mMIMO Systems with Dynamic TDD",

abstract = "Cell-free massive multi-input multi-output (CF-mMIMO) systems assume that a single central processing unit (CPU) communicates with a large number of user equipments (UEs) using the same time-frequency resources. However, allocating the same frame configuration to all the UEs makes it difficult to meet the traffic demands of each individual UE. In this paper, we propose using dynamic-time division duplex (D-TDD) in CF-mMIMO systems. To mitigate the cross-link interference (CLI), we propose a new UE-grouping algorithm. Simulation results show that the implementation of D-TDD reduces the median value of the UL packet delay and the DL packet delay by up to 75% and 30% respectively. Furthermore, the proposed UE-grouping reduces the average packet delay by 50% compared to static-TDD (S-TDD).",

author = "Hanwoong Kim and Hakkeon Lee and Taehyung Kim and Daesik Hong",

note = "Funding Information: ACKNOWLEDGMENT This work was supported by Institute of Information & communications Technology Planning Evaluation (IITP) grant funded by the Korea government (MSIT) (No. 2021-0-00973, Development of next-generation wireless modem technology (Post-OFDM)). Publisher Copyright: {\textcopyright} 2022 IEEE.; 95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring ; Conference date: 19-06-2022 Through 22-06-2022",

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doi = "10.1109/VTC2022-Spring54318.2022.9861013",

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Kim, H, Lee, H, Kim, T & Hong, D 2022, Cell-Free mMIMO Systems with Dynamic TDD. in 2022 IEEE 95th Vehicular Technology Conference - Spring, VTC 2022-Spring - Proceedings. IEEE Vehicular Technology Conference, vol. 2022-June, Institute of Electrical and Electronics Engineers Inc., 95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring, Helsinki, Finland, 22/6/19. https://doi.org/10.1109/VTC2022-Spring54318.2022.9861013

Cell-Free mMIMO Systems with Dynamic TDD. / Kim, Hanwoong; Lee, Hakkeon; Kim, Taehyung et al.

2022 IEEE 95th Vehicular Technology Conference - Spring, VTC 2022-Spring - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2022. (IEEE Vehicular Technology Conference; Vol. 2022-June).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N1 - Funding Information: ACKNOWLEDGMENT This work was supported by Institute of Information & communications Technology Planning Evaluation (IITP) grant funded by the Korea government (MSIT) (No. 2021-0-00973, Development of next-generation wireless modem technology (Post-OFDM)). Publisher Copyright: © 2022 IEEE.

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Cell-Free mMIMO Systems with Dynamic TDD

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