A Multi-Cell Delta-CQI Coordinated Scheduling for CoMP Systems with Limited Feedback

doi:10.13190/jbupt.201303.101.zhangtk

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2013, Vol. 36 ›› Issue (3): 97-101.doi: 10.13190/jbupt.201303.101.zhangtk

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A Multi-Cell Delta-CQI Coordinated Scheduling for CoMP Systems with Limited Feedback

ZHANG Tian-kui^1,2, WANG Fei¹, LI Bo¹, ZENG Zhi-min^1,2

1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2. Beijing Key Laboratory of Network System Architecture and Convergence, Beijing 100876, China

Received:2012-05-21 Online:2013-06-30 Published:2013-06-30

Abstract

Abstract:

In the coordinated multi-point systems with limited feedback, a multi-cell coordinated scheduling algorithm is proposed for inter-cell interference coordination and cell-edge user’s throughput enhancement. The concept of delta-channel quality indicator (delta CQI) is used to indicate the interference level of users in one cell when the users in adjacent cells of cooperation region using different precoding vectors. The base stations exchange the information of delta-CQI which is fed back from the users in each cell and calculate the weighted interference factor, then the user scheduling are performed by the multiple cells in the cooperative cell set along with the priority factor given by the proportional fairness scheduling algorithm used in each cell. The proposed algorithm considers the user interference among different cells to improve the data rate of users in cell edge, which gives a good tradeoff between system fairness and spectrum efficiency. Meanwhile, the overhead of the control information exchange among coordinated cells is reduced by the delta-CQI feedback and exchange.

Key words: coordinated multi-point, multi-cell cooperation, scheduling, limited feedback

CLC Number:

TN929.53

ZHANG Tian-kui, WANG Fei, LI Bo, ZENG Zhi-min. A Multi-Cell Delta-CQI Coordinated Scheduling for CoMP Systems with Limited Feedback[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2013, 36(3): 97-101.

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A Multi-Cell Delta-CQI Coordinated Scheduling for CoMP Systems with Limited Feedback

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