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- W58649469 abstract "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 conventiona l wisdom, fail to provide rate-stability for an otherwise stabilizable OFDMA system. Water-filling is too myopic when conside ring long-time 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 gua rantee rate stability and/or to minimize average delay. In this paper, we identify an optimal non-idling policy which balances the queue lengths, when the channel follows an ON/OFF model. In such case, we show that such a policy achieves the minimum holding cost (mean response time) at any time." @default.
- W58649469 created "2016-06-24" @default.
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- W58649469 date "2004-01-01" @default.
- W58649469 modified "2023-10-06" @default.
- W58649469 title "Resource Allocation in OFDMA: How Load-Balancing Maximizes Throughput When Water-Filling Fails" @default.
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