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).
|Title of host publication||2022 IEEE 95th Vehicular Technology Conference - Spring, VTC 2022-Spring - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Publication status||Published - 2022|
|Event||95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring - Helsinki, Finland|
Duration: 2022 Jun 19 → 2022 Jun 22
|Name||IEEE Vehicular Technology Conference|
|Conference||95th IEEE Vehicular Technology Conference - Spring, VTC 2022-Spring|
|Period||22/6/19 → 22/6/22|
Bibliographical noteFunding 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)).
© 2022 IEEE.
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics