MIMO-OFDM系统基于实时业务的跨层子载波分配

针对MIMO-OFDM系统的实时业务提出一种新的动态子载波分配算法。该算法基于物理层的信道状态信息，MAC层的队列状态信息和系统中每个队列的平均等待时间来动态分配子载波。仿真结果表明，该算法在保证用户之间竞争资源公平性的前提下，不仅保证了实时业务的时延要求，而且提高了系统吞吐量。

Cross-layer subcarrier allocation for real-time service in MIMO-OFDM systems

In this paper, a new subcarrier allocation algorithm was proposed for real-time services in MIMO-OFDM(multiple input multiple output-orthogonal frequency division multiplexing)systems. The algorithm dynamically allocated subcarriers based on the physical layer channel state information (CSI), the MAC layer queueing state information (QSI) and the mean waiting time for each queue in the systems. Simulation results indicate that, when the premise of the fairness among the users competition for resource is ensured, our proposed algorithm guarantees the requirement of the waiting time, and improves the system throughput.