A multi-cell coordinated scheduling algorithm based on delta-CQI for CoMP network systems

作者：Yang Dingcheng; Xiao Lin; Wang Fei; Li An

来源：Journal of Networks, 2013, 8(9): 2121-2127.

DOI：10.4304/jnw.8.9.2121-2127

• Coordinated multi point (CoMP)
• Coordinated multi points
• Coordinated scheduling
• Coordinated scheduling/beamforming
• Inter-cell interference coordination
• Limited feedback
• Multi-cell cooperations
• Proportional fairness scheduling

In the coordinated scheduling/beamforming of coordinated multi-point (CoMP) systems, a multi-cell coordinated scheduling algorithm is proposed for inter-cell interference coordination and cell-edge users' throughput enhancement. The concept of Delta-CQI is introduced to indicate the interference level experienced by users in one cell when the users in adjacent cells of the cooperation region using different precoding vectors. Adjacent 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 is 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 multi-cell coordinated scheduling 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. Beside that, the overhead of the control information exchange among coordinated cells are reduced by the Delta-CQI feedback and exchange.

• 出版日期2013
• 单位北京大学