Downlink Scheduling and Resource Allocation for OFDM Systems
Downlink Scheduling and Resource Allocation for OFDM Systems
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DOI：
10.1109/ciss.2006.286660
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
Jianwei Huang;V. Subramanian;R. Agrawal;R. Berry
中科院分区：
文献类型：
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作者：
Jianwei Huang;V. Subramanian;R. Agrawal;R. Berry
我们考虑基于OFDM的无线网络的下行链路的调度和资源分配。在每个时隙期间，调度和资源分配问题涉及选择用于传输的用户子集，确定可用子载波到所选用户的分配，以及对于每个子载波确定传输功率以及所使用的编码和调制方案。我们解决这一问题的背景下，基于效用的调度和资源分配方案在早期的论文。调度和资源分配是通过求解一个优化问题来确定的，这个优化问题对于一个合理的可行速率模型是凸的。通过利用该问题的结构，我们给出了最优和次优算法的解决方案。我们提供了模拟结果比较不同的算法和参数设置。
We consider scheduling and resource allocation for the downlink of a OFDM-based wireless network. During each time-slot the scheduling and resource allocation problem involves selecting a subset of users for transmission, determining the assignment of available subcarriers to selected users, and for each subcarrier determining the transmission power and the coding and modulation scheme used. We address this in the context of a utility-based scheduling and resource allocation scheme presented in earlier papers. Scheduling and resource allocation is determined by solving an optimization problem, which is convex for a reasonable model of the feasible rates. By exploiting the structure of this problem, we give optimal and sub-optimal algorithms for its solution. We provide simulation results comparing different algorithms and parameter settings.