A novel QoS-aware joint feedback and scheduling scheme for multiuser MIMO systems (無線通信システム)

概要

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This report considers the problem of scheduling, in closed-loop multiuser MIMO systems, a large set of users with different Quality of Service (QoS) requirements, supplied by a single base station (BS) by means of Zero-Forcing Beamforming (ZFBF). We provide a power-and-bandwidth efficient feedback scheme in which only ZFBF-optimal users feedback their CSI, thereby reducing the number of required feedbacks and the computational burden of exhaustive search for best users at the BS. Having shown, in a previous work, that conventional sum-capacity maximizing scheduling policies fall short to meet the requisites of delay-sensitive applications, we provide appropriate scheduling scheme for such-constrained users. Simulation results demonstrate that the proposed scheduling approach successfully meets both average and instantaneous delay constraints of delay-sensitive applications.
社団法人電子情報通信学会の論文
2009-06-18