Title :
Joint Transmission Mode Selection and Scheduling in LTE Downlink MIMO Systems
Author :
Jinping Niu ; Tao Su ; Li, Geoffrey Ye ; Daewon Lee ; Yusun Fu
Author_Institution :
Nat. Lab. of Radar Signal Process., Xidian Univ., Xi´an, China
Abstract :
In this article, we investigate multiple-input multiple-output (MIMO) transmission mode selection and scheduling for LTE downlink with users of different mobilities. Our algorithm first classifies users into high- and low-mobility ones, then selects open-loop spatial multiplexing (OLSM) or close-loop spatial multiplexing (CLSM) mode based on user´s mobility, and finally assigns the time-frequency resources to ensure multi-user or frequency diversity. The proposed algorithm is with low complexity, considers all practical constraints in LTE systems, and can achieve up to 27% cell-average and 25% cell-edge throughput gain.
Keywords :
Long Term Evolution; MIMO communication; scheduling; space division multiplexing; CLSM mode; LTE downlink MIMO systems; OLSM mode; cell-average throughput gain; cell-edge throughput gain; close-loop spatial multiplexing mode; frequency diversity; high-mobility algorithm; joint transmission mode selection-scheduling; low-mobility algorithm; multiple-input multiple-output systems; multiuser diversity; open-loop spatial multiplexing mode; time-frequency resources; user mobility; Downlink; Interference; Long Term Evolution; MIMO; Scheduling; Signal to noise ratio; Throughput; 3GPP; CLSM; LTE; OLSM; Scheduling; downlink; frequency selective; high-mobility; low-mobility; transmission mode;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2013.123013.130823
