Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System
Dynamic time-division duplexing (TDD) allows for flexible resource allocation for the varying downlink (DL) and uplink (UL) traffic demands in the 5G cellular network. It becomes more useful when the number of active users is highly limited, especially for the small cells in a ultra-dense network. H...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9408575/ |
| _version_ | 1818871377254416384 |
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| author | Jaewon Lee Minjoong Rim Chung G. Kang |
| author_facet | Jaewon Lee Minjoong Rim Chung G. Kang |
| author_sort | Jaewon Lee |
| collection | DOAJ |
| description | Dynamic time-division duplexing (TDD) allows for flexible resource allocation for the varying downlink (DL) and uplink (UL) traffic demands in the 5G cellular network. It becomes more useful when the number of active users is highly limited, especially for the small cells in a ultra-dense network. However, traffic imbalance between DL and UL in adjacent cells incurs crosslink interference (CLI), which may seriously reduce the system throughput. In order to deal with CLI induced by dynamic TDD, full or partial information on slot assignment and/or mutual interference must be shared among all cells for coordinating dynamic slot assignment throughout the system. In this paper, we propose the fully decentralized slot assignment policies that can reduce the CLI without resorting to side information shared among the cells. It is based a bi-directional slot-ordered scheduling scheme in each subframe, which exploits implicit location-dependent information such as signal-to-interference-plus-noise ratio (SINR) and/or three-dimensional spatial angle for all UEs in each cell under a full-dimension multi-input and multi-output (FD-MIMO) operation. Our system-level performance evaluation in 5G system scenario has shown that the proposed approach can maintain total interference almost constant even subject to the CLI. Furthermore, it achieves the average system throughput as much as 95% and 91% of the performance that can be achieved by a centralized greedy search for DL and UL, respectively, without much compromising the lower 5% system throughput. |
| first_indexed | 2024-12-19T12:21:57Z |
| format | Article |
| id | doaj.art-d9378fcce67a47e4aa2a56c0a00b7754 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-19T12:21:57Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-d9378fcce67a47e4aa2a56c0a00b77542022-12-21T20:21:45ZengIEEEIEEE Access2169-35362021-01-019635676357910.1109/ACCESS.2021.30741769408575Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular SystemJaewon Lee0https://orcid.org/0000-0002-6050-9146Minjoong Rim1https://orcid.org/0000-0001-8741-7412Chung G. Kang2https://orcid.org/0000-0001-7965-2826School of Electrical Engineering, Korea University, Seoul, South KoreaDepartment of Information and Communication Engineering, Dongguk University, Seoul, South KoreaSchool of Electrical Engineering, Korea University, Seoul, South KoreaDynamic time-division duplexing (TDD) allows for flexible resource allocation for the varying downlink (DL) and uplink (UL) traffic demands in the 5G cellular network. It becomes more useful when the number of active users is highly limited, especially for the small cells in a ultra-dense network. However, traffic imbalance between DL and UL in adjacent cells incurs crosslink interference (CLI), which may seriously reduce the system throughput. In order to deal with CLI induced by dynamic TDD, full or partial information on slot assignment and/or mutual interference must be shared among all cells for coordinating dynamic slot assignment throughout the system. In this paper, we propose the fully decentralized slot assignment policies that can reduce the CLI without resorting to side information shared among the cells. It is based a bi-directional slot-ordered scheduling scheme in each subframe, which exploits implicit location-dependent information such as signal-to-interference-plus-noise ratio (SINR) and/or three-dimensional spatial angle for all UEs in each cell under a full-dimension multi-input and multi-output (FD-MIMO) operation. Our system-level performance evaluation in 5G system scenario has shown that the proposed approach can maintain total interference almost constant even subject to the CLI. Furthermore, it achieves the average system throughput as much as 95% and 91% of the performance that can be achieved by a centralized greedy search for DL and UL, respectively, without much compromising the lower 5% system throughput.https://ieeexplore.ieee.org/document/9408575/5Gcrosslink interference (CLI)dynamic TDDfull dimension MIMOnew radio (NR)time-division duplexing (TDD) |
| spellingShingle | Jaewon Lee Minjoong Rim Chung G. Kang Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System IEEE Access 5G crosslink interference (CLI) dynamic TDD full dimension MIMO new radio (NR) time-division duplexing (TDD) |
| title | Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System |
| title_full | Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System |
| title_fullStr | Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System |
| title_full_unstemmed | Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System |
| title_short | Decentralized Slot-Ordered Cross Link Interference Control Scheme for Dynamic Time Division Duplexing (TDD) in 5G Cellular System |
| title_sort | decentralized slot ordered cross link interference control scheme for dynamic time division duplexing tdd in 5g cellular system |
| topic | 5G crosslink interference (CLI) dynamic TDD full dimension MIMO new radio (NR) time-division duplexing (TDD) |
| url | https://ieeexplore.ieee.org/document/9408575/ |
| work_keys_str_mv | AT jaewonlee decentralizedslotorderedcrosslinkinterferencecontrolschemefordynamictimedivisionduplexingtddin5gcellularsystem AT minjoongrim decentralizedslotorderedcrosslinkinterferencecontrolschemefordynamictimedivisionduplexingtddin5gcellularsystem AT chunggkang decentralizedslotorderedcrosslinkinterferencecontrolschemefordynamictimedivisionduplexingtddin5gcellularsystem |