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Research on Downlink User Schedulingalgorithm in LTE-Advanced CoMP System

Author: LiuBangHui
Tutor: SongRongFang
School: Nanjing University of Posts and Telecommunications
Course: Communication and Information System
Keywords: Coordinated multipoint transmission Combined treatment User scheduling Cell clustering Joint precoding
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 180
Quote: 1
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Abstract


LTE-Advanced system as the Third Generation Partnership Plan (3rd Generation Partnership Project 3GPP) Long Term Evolution (Long Term Evolution, LTE) the evolution of the system, its main purpose is to obtain higher system throughput and spectrum efficiency to meet the IMT -Advanced system performance requirements. Getting smaller and smaller as the cell size, the frequency reuse factor for a configuration, the cell performance is largely limited by the inter-cell interference (Inter-cell interference, ICI) and the LTE system has been interference coordination technique does not effectively solve the problem of low spectrum efficiency of edge users. Coordinated multi-point transmission (Coordinated Multi-Point, CoMP) technology as an effective cell between coordination techniques, the LTE-Advanced system is proposed and studied. The technology through collaboration between multiple cells transmission or joint scheduling of interfering signals into useful signal, reduce adjacent inter-cell co-channel interference and improve the quality of the received signal, thereby effectively enhancing edge user spectral efficiency and cell average throughput. Currently, 3GPP organization has discussed and standardization of CoMP technology combined treatment (Joint Processing, JP) and collaborative scheduling / collaborative beamforming (Coordinated Scheduling / Coordinated Beamforming, CS / CB) transmission scheme is divided into two main directions . The technology can be divided into the number of users of the system services at the same time in the same scheduling slot CoMP single-user multi-input multi-output (CoMP Single User Multiple Input Multiple Output CoMP-SU-MIMO) and the CoMP multi-user multi-input multi-output ( CoMP Multiple User Multiple Input Multiple Output, CoMP-MU-MIMO) two main directions. The main work of this paper is for CoMP with JP technology research and study for CoMP system downlink user scheduling algorithm applies CoMP-SU-MIMO and CoMP-MU-MIMO system, respectively. For CoMP-SU-MIMO system, given a joint proportional fair scheduling algorithm (Joint Proportional Fair, CoMP-SU-MIMO-JPF), CoMP-MU-MIMO system, the number of a paired user variable adaptive user pairing (Adaptive User Pairing, CoMP-MU-MIMO-AUP) scheduling algorithm combined capacity maximization, the user channel related factors minimization and user fairness criteria, respectively, to study and simulation assessment of the proposed algorithm and Analysis.

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