Dynamic Clustering and Coordinated User Scheduling for Cooperative Interference Cancellation on Ultra-High Density...

Area of Science:

• Wireless communication networks
• Antenna systems engineering
• Signal processing for interference mitigation

Background:

• Ultra-high density distributed antenna systems (UHD-DAS) offer enhanced spatial spectral efficiency.
• Dense deployment of remote radio units (RUs) in UHD-DAS exacerbates inter-cell interference (ICI).
• Existing cell clustering mitigates ICI but inter-cluster interference (ICLI) remains a capacity limitation.

Purpose of the Study:

• To propose dynamic clustering and user scheduling for ICLI cancellation in UHD-DAS.
• To address the frequency reuse distance limitation of previous ICLI cancellation schemes.
• To enhance the performance of UHD-DAS by optimizing interference management.

Main Methods:

• Implementing dynamic clustering of remote radio units (RUs).
• Coordinating user scheduling to ensure effective reuse distance.
• Applying a previously conceived inter-cluster interference cancellation (ICLI) scheme.
• Jointly optimizing dynamic clustering and ICLI cancellation.

Main Results:

• The proposed dynamic clustering and user scheduling effectively mitigates ICLI.
• The system achieves performance close to ideal full cooperative spatial multiplexing.
• Interference cancellation is achieved without requiring additional frequency reuse.
• Enhanced spatial spectral efficiency is demonstrated.

Conclusions:

• Dynamic clustering and coordinated user scheduling are effective for ICLI cancellation in UHD-DAS.
• The proposed approach overcomes limitations of prior ICLI cancellation techniques.
• Near-ideal performance is achievable, improving overall system capacity and efficiency.