首页> 外文会议>Annual Allerton Conference on Communication, Control, and Computing; 20040929-1001; Monticello,IL(US) >Rate Stable Resource Allocation in OFDM Systems: From Water-filling to Queue-Balancing
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Rate Stable Resource Allocation in OFDM Systems: From Water-filling to Queue-Balancing

机译:OFDM系统中速率稳定的资源分配:从注水到队列平衡

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This paper considers the issue of optimal subcarrier allocation in OFDMA. We show, via a counter example, that water-filling based subcarrier allocation policies, contrary to conventional wisdom, fail to provide rate-stability for an otherwise stabilizable OFDMA system. Water-filling is too myopic when considering longtime average performance, e.g. delay, queue lengths, and even long-run throughput. This is because such policies ignore variable state (queue length) information, while, in fact, such an information is necessary to guarantee rate stability and/or to minimize average delay. In this paper, we identify a policy, based on maximum weighted matching and show that such a policy achieves %100 throughput for all admissible traffic.
机译:本文考虑了OFDMA中最优子载波分配的问题。通过反例,我们表明,与传统观点相反,基于注水的子载波分配策略无法为原本可以稳定的OFDMA系统提供速率稳定性。考虑到长时间的平均性能时,注水太近了。延迟,队列长度,甚至是长期吞吐量。这是因为此类策略会忽略可变状态(队列长度)信息,而实际上,此类信息对于保证速率稳定性和/或最小化平均延迟是必需的。在本文中,我们基于最大加权匹配确定了一项策略,并表明该策略可为所有允许的流量实现%100的吞吐量。

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