Scalable Cell-Free Massive MIMO
Scalable Cell-Free Massive MIMO
Distributed cooperation and resource allocation for practical 6G networks
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Cell-Free massive MIMO is a promising architecture for future wireless networks, where many distributed access points jointly serve user equipment without relying on fixed cell boundaries. By moving from cell-centric operation to user-centric cooperation, Cell-Free massive MIMO can improve coverage uniformity and reduce cell-edge performance degradation.
Scalability Challenges
Scalability Challenges
Large-scale Cell-Free massive MIMO systems face a fundamental scalability challenge. When the number of APs and UEs increases, a single CPU cannot efficiently manage global channel estimation, cooperation control, power allocation, and data processing.
A practical solution is to divide the network into multiple processing regions. However, this introduces new problems: users near CPU boundaries may lose access to favorable access points, inter-CPU interference becomes harder to control, and excessive information exchange can offset the benefits of distributed cooperation.
Key Research Topics
Key Research Topics
AP Clustering
AP Clustering
Forming user-centric access point clusters based on large-scale channel characteristics to support scalable and robust distributed transmission.
Power Control
Power Control
Developing cooperative power allocation strategies that improve coverage robustness and fairness under practical multi-CPU architectures.
Subchannel Assignment
Subchannel Assignment
Assigning subchannels under dense and non-uniform user distributions using LSFC-based similarity and interference-aware scheduling principles.
Representative Publications
Representative Publications
CPU-Cooperative Power Control Scheme for Scalable Cell-Free Massive MIMO Systems
IEEE Transactions on Wireless Communications (IF: 10.7), 2024 (First Author)
Scalable Subchannel Assignment for Cell-Free Massive MIMO Systems under Non-Uniform User Deployment
IEEE Transactions on Vehicular Technology (IF: 7.1), Major Revision (First Author)
Multi-CPU Dynamic Cooperation Clustering for Scalable Cell-Free Massive MIMO Systems
IEEE Global Communications Conference, 2025 (First Author)
Revisiting the Coverage Boundary of Multi-CPU Cell-Free Massive MIMO: CPU Cooperation Aspect
IEEE International Conference on Communications, 2023 (First Author)
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