Low-Complexity User Scheduling with Switched Tilting for 3D Cellular Systems
Joint Authors
Liu, Haijing
Gao, Hui
Lv, Tiejun
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-04-06
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
We propose a low-complexity user scheduling scheme to enhance the sum rate performance for a multicell downlink system, in which the base station (BS) is equipped with a large-scale active antenna array.
First, we divide each cell into N regions according to the vertical beamwidth of the BS antennas.
Next, candidate user equipment (UE) items are assigned to corresponding groups to their locations.
Each scheduling slot is also divided into N equal-time subslots.
Then, at each subslot, we focus on one UE group, select the optimal number, K*, of UEs for simultaneous data transmission in the manner of round-robin scheduling, and adjust the BS antenna tilting to the optimal angle θtilt*.
In particular, K* and θtilt* for each UE group are both obtained by means of large-system asymptotic analysis.
Benefiting from the random matrix theory tools, the asymptotic analytical results are independent of instantaneous channel state information of UE, which make it possible to solve K* and θtilt* offline, therefore saving the online computational resources significantly.
Numerical results verify that the proposed scheme achieves good sum rate performance with extremely low computational complexity.
American Psychological Association (APA)
Liu, Haijing& Gao, Hui& Lv, Tiejun. 2015. Low-Complexity User Scheduling with Switched Tilting for 3D Cellular Systems. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1074342
Modern Language Association (MLA)
Liu, Haijing…[et al.]. Low-Complexity User Scheduling with Switched Tilting for 3D Cellular Systems. Mathematical Problems in Engineering No. 2015 (2015), pp.1-9.
https://search.emarefa.net/detail/BIM-1074342
American Medical Association (AMA)
Liu, Haijing& Gao, Hui& Lv, Tiejun. Low-Complexity User Scheduling with Switched Tilting for 3D Cellular Systems. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1074342
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1074342