naa a22 4500 510791921 CHVBK 20180411083322.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11277-012-0926-6 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0926-6 A Novel CSI Feedback Method for Dynamic SU/MU MIMO Adaptation [Elektronische Daten] [Yuefeng Peng, Wei Yang, Yuan Zhu, Young-Il Kim] Channel state information (CSI) reporting at one mobile station (MS) often targets maximizing the throughput of one single link, hence is optimized for single-user multi-input multi-output (SU-MIMO) transmission at base station (BS). However, the system wide throughput may not be maximized when BS is performing multi-user multi-input multi-output (MU-MIMO) transmission utilizing the SU-MIMO optimized CSI reports, and vice versa. This CSI mismatch can cause system throughput degradation. In this paper, a novel CSI feedback method is proposed which can switch between SU-MIMO optimized CSI reporting mode and MU-MIMO optimized CSI reporting mode when instructed by BS's signaling. System level simulation results show when BS is performing MU-MIMO transmission, significant throughput gain can be obtained if MS feeds back MU-MIMO optimized CSI reports instead of SU-MIMO optimized CSI reports. With the instruction of the BS signaling to dynamic indicate MS to switch between SU-MIMO and MU-MIMO optimized CSI reporting modes, the SU-MIMO performance is not compromised either. Springer Science+Business Media New York, 2012 Wireless communication nationallicence SU-MIMO nationallicence MU-MIMO nationallicence CSI reporting nationallicence Feedback nationallicence Peng Yuefeng School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China aut Yang Wei National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut Zhu Yuan Mobile Wireless Group, Wireless Technology Division, Intel Corporation, 100190, Beijing, China aut Kim Young-Il School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/3(2013-08-01), 2111-2123 0929-6212 71:3<2111 2013 71 11277 https://doi.org/10.1007/s11277-012-0926-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0926-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Peng Yuefeng School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China aut NATIONALLICENCE 700 1- Yang Wei National Mobile Communications Research Laboratory, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Zhu Yuan Mobile Wireless Group, Wireless Technology Division, Intel Corporation, 100190, Beijing, China aut NATIONALLICENCE 700 1- Kim Young-Il School of Electronic and Information Engineering, Beijing Jiaotong University, 100044, Beijing, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/3(2013-08-01), 2111-2123 0929-6212 71:3<2111 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer