User Scheduling for Cooperative Base Station Transmission Exploiting Channel Asymmetry

被引:7
作者
Han, Shengqian [1 ]
Yang, Chenyang [1 ]
Bengtsson, Mats [2 ]
机构
[1] Beihang Univ BUAA, Sch Elect & Informat Engn, Beijing, Peoples R China
[2] Royal Inst Technol KTH, Sch Elect Engn, Stockholm, Sweden
关键词
Coordinated multi-point (CoMP); user scheduling; low overhead; channel asymmetry;
D O I
10.1109/TCOMM.2013.020413.110188
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];
摘要
We study low-signalling overhead scheduling for downlink coordinated multi-point (CoMP) transmission with multi-antenna base stations (BSs) and single-antenna users. By exploiting the asymmetric channel feature, i.e., the pathloss differences towards different BSs, we derive a metric to judge orthogonality among users only using their average channel gains, based on which we propose a semi-orthogonal scheduler that can be applied in a two-stage transmission strategy. Simulation results demonstrate that the proposed scheduler performs close to the semi-orthogonal scheduler with full channel information, especially when each BS is with more antennas and the cell-edge region is large. Compared with other overhead reduction strategies, the proposed scheduler requires much less training overhead to achieve the same cell-average data rate.
引用
收藏
页码:1426 / 1435
页数:10
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