Revisiting the Coverage Boundary of Multi-CPU Cell-Free Massive MIMO: CPU Cooperation Aspect
- Title
- Revisiting the Coverage Boundary of Multi-CPU Cell-Free Massive MIMO: CPU Cooperation Aspect
- Author
- 조성현
- Keywords
- Cell-free massive MIMO; multi-CPU; CPU-edge; CPU cooperation; spectral efficiency
- Issue Date
- 2023-05
- Publisher
- IEEE Communications Society
- Citation
- 2023 IEEE International Conference on Communications (ICC): Mobile and Wireless Networks Symposium, Page. 1022-1028
- Abstract
- Cell-free massive MIMO (CF-mMIMO) provides flattened spectral efficiency throughout the network. Recently, multi-CPU CF-mMIMO (MC-CF-mMIMO) has been considered for addressing a scalability problem. However, MC-CF-mMIMO now suffers from a performance degradation problem in the boundary of the CPU overage, referred the CPU-edge. In this study, we analyze and improve the performance of MC-CFmMIMO, focusing on the CPU-edge. First, we present a simple CPU cooperation scheme to mitigate the performance degradation problem on the CPU-edge. Then, we provide the closedform expression of the downlink spectral efficiency according to the precoding schemes. Experimental results indicate that performance without CPU cooperation on the CPU-edge is degraded by 28.66% compared with CPU cooperation.
- URI
- https://information.hanyang.ac.kr/#/eds/detail?an=edseee.10278617&dbId=edseeehttps://repository.hanyang.ac.kr/handle/20.500.11754/190024
- ISBN
- 978-1-5386-7462-8
- ISSN
- 1938-1883
- DOI
- 10.1109/ICC45041.2023.10278617
- Appears in Collections:
- COLLEGE OF COMPUTING[E](소프트웨어융합대학) > COMPUTER SCIENCE(소프트웨어학부) > Articles
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