Research Article
Random-Backoff Enabled Distributed Scheduling in CoMP Systems
@INPROCEEDINGS{10.1109/ChinaCom.2013.6694569, author={Cui Zeng and Pinyi Ren and Ruiping Qiao and Qinghe Du and Li Sun}, title={Random-Backoff Enabled Distributed Scheduling in CoMP Systems}, proceedings={8th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2013}, month={11}, keywords={coordinated multi-point transmission; distributed coordination scheduling; random backoff principle}, doi={10.1109/ChinaCom.2013.6694569} }- Cui Zeng
Pinyi Ren
Ruiping Qiao
Qinghe Du
Li Sun
Year: 2013
Random-Backoff Enabled Distributed Scheduling in CoMP Systems
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2013.6694569
Abstract
Coordinated Multi-Point transmission (CoMP) is one of the key technologies in LTE-Advanced (LTE-A) systems to effectively improve the spectral efficiency of cell-edge users. In this paper, we propose a random-backoff enabled distributed scheduling scheme in CoMP systems, which aims at combating inter-cell interferences and efficiently enhancing the cell-edge users' spectral efficiency. Specifically, each base station (BS) uses the dynamic clustering algorithm to identify the cells causing the strongest interferences to its scheduled user. Then, in order to eliminate the strong interferences, each BS sends the coordination requests to BSs of these interfering cells. After exchanging coordination requests, each BS decides whether to continue transmissions for its scheduled user based on the coordination requests and the number of coordinated cells. If there are still collisions after coordination, the BSs of the corresponding cells use random backoff strategies for collision avoidance. Simulations results show that our proposed distributed scheme outperforms the conventional schemes in terms of the spectral efficiency of cell-edge users.
