Design of Fair Weights for Heterogeneous Traffic Scheduling in Multichannel Wireless Networks
Design of Fair Weights for Heterogeneous Traffic Scheduling in Multichannel Wireless Networks
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DOI：
10.1109/tcomm.2010.082710.090361
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发表时间：
2010-10
影响因子：
8.3
通讯作者：
M. Mehrjoo;M. Awad;M. Dianati;Xuemin Shen
中科院分区：
文献类型：
--
作者：
M. Mehrjoo;M. Awad;M. Dianati;Xuemin Shen
在最近的资源分配方案中，已经实施了公平权重来维护公平性。然而，为多业务无线网络设计公平的权重并不是一件容易的事情，因为用户的速率要求是不同的，并且他们的信道增益是可变的。针对正交频分多址(OFDMA)网络中异质业务的机会调度问题，设计了公平的权值。公平权重确定每个用户的费率份额，以维持效用公平概念。然后，我们提出了一种调度方案，强制用户的长期平均传输速率与公平权重成比例。该调度器充分利用了用户的信道状态信息和OFDMA资源分配的灵活性，实现了高效的资源利用。此外，使用公平的权重允许灵活地实现不同的调度方案，这些调度方案适应在异类业务类型和用户移动性方面的各种要求。文中给出了基于仿真的性能分析，以验证所提出方案的有效性。
Fair weights have been implemented to maintain fairness in recent resource allocation schemes. However, designing fair weights for multiservice wireless networks is not trivial because users' rate requirements are heterogeneous and their channel gains are variable. In this paper, we design fair weights for opportunistic scheduling of heterogeneous traffic in orthogonal frequency division multiple access (OFDMA) networks. The fair weights determine each user's share of rate for maintaining a utility notion of fairness. We then present a scheduling scheme which enforces users' long term average transmission rates to be proportional to the fair weights. The proposed scheduler takes the advantage of users' channel state information and the inherent flexibility of OFDMA resource allocation for efficient resource utilization. Furthermore, using the fair weights allows flexibility for realization of different scheduling schemes which accommodate a variety of requirements in terms of heterogeneous traffic types and user mobility. Simulation based performance analysis is presented to demonstrate efficacy of the proposed solution in this paper.