Low Complexity Centralized Scheduling Scheme for Downlink CoMP

Jing WANG  Satoshi NAGATA  Lan CHEN  Huiling JIANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B   No.5   pp.940-948
Publication Date: 2015/05/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.940
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
coordinated multi-point (CoMP),  centralized scheduling,  low complexity,  scheduling indicator vector,  

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Summary: 
Coordinated multi-point (CoMP) transmission and reception is a promising technique for interference mitigation in cellular systems. The scheduling algorithm for CoMP has a significant impact on the network processing complexity and performance. Performing exhaustive search permits centralized scheduling and thus the optimal global solution; however, it incurs a high level of computational complexity and may be impractical or lead to high cost as well as network instability. In order to provide a more realistic scheduling method while balancing performance and complexity, we propose a low complexity centralized scheduling scheme that adaptively selects users for single-cell transmission or different CoMP scheme transmission to maximize the system weighted sum capacity. We evaluate the computational complexity and system-level simulation performance in this paper. Compared to the optimal scheduling method with exhaustive search, the proposed scheme has a much lower complexity level and achieves near optimal performance.