A MAXMIN resource allocation approach for scalable video delivery over multiuser MIMO-OFDM systems

摘要

In this paper, we propose a novel approach for scalable video delivery over multiuser Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems with MAXMIN fairness ensured. Scalable Video Coding (SVC) is efficient for rate adaptation and unequal protection in wireless networks where heterogeneous mobile clients have different hardware specifications and time-varying channel conditions. Using the scalability characteristics of SVC, we propose a general approach to ensure fairness for multiple scalable video downlink from a multiple-antenna base station. The fairness is achieved by packet priority analysis referring to layer dependency from application layer and a MAXMIN resource allocation at the physical layer. Based on packet priorities, time-frequency resource, power and modulation schemes are adaptively selected for transmission. This scheme significantly improves the overall system performance and guarantee fairness among users, as demonstrated by experimental comparisons with conventional radio resource allocation schemes.