Title :
Multi-Cell Coordinated Scheduling and Power Allocation in Downlink LTE-A Systems
Author :
Jian Yu ; Li, Geoffrey Ye ; Changchuan Yin ; Suwen Tang ; Xiaolong Zhu
Author_Institution :
Beijing Key Lab. of Network Syst. Archit. & Convergence, Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this paper, we investigate multi-cell coordinated scheduling and power allocation in downlink long term evolution advanced (LTE-A) systems, where orthogonal frequency division multiple-access (OFDMA) is used. The proposed scheme performs joint scheduling, power allocation, and modulation and coding scheme (MCS) selection to maximize the overall weighted throughput with proportional fairness. Our scheme considers the practical constraints in LTE-A systems. Since the optimization problem is a combinatorial and non- convex one and is with high complexity, low- complexity and suboptimal algorithms are proposed, which separate the scheduling and power allocation into two subproblems. Simulation results show that the proposed scheme can improve the average system throughput by 10% and the 10th percentile throughput by 15% compared with the existing scheme.
Keywords :
Long Term Evolution; OFDM modulation; encoding; frequency division multiple access; optimisation; resource allocation; scheduling; OFDMA; coding scheme; downlink LTE-A systems; downlink long term evolution advanced; modulation scheme; multicell coordinated scheduling; optimization problem; orthogonal frequency division multiple access; power allocation; proportional fairness; Indexes; Interference; Optimization; Resource management; Scheduling; Signal to noise ratio; Throughput;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th
Conference_Location :
Vancouver, BC
DOI :
10.1109/VTCFall.2014.6966061
