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Power-controlled multiple access with a queue-dependent backoff threshold

机译:功率控制的多路访问,具有取决于队列的退避阈值

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We propose and evaluate a new distributed algorithm for transmit power control (TPC) in wireless networks. We cast the TPC problem as a dynamic program which captures a fundamental tradeoff between transmit power and delay, and we use its solution to inform our design. The resulting algorithm is reminiscent of existing TPC approaches which seek to have each link maintain a constant signal-to-interference-plus-noise ratio (SINR), but with a key difference: a queue-dependent backoff threshold which allows links to temporarily stop transmitting when the interference grows too large. In high interference scenarios, this difference allows our algorithm to automatically induce a network behavior similar to time-division multiple access (TDMA), without any explicit cross-link coordination. As a result of this behavior, we demonstrate that our algorithm can provide substantial throughput improvements over previous schemes.
机译:我们提出并评估了一种新的分布式算法,用于无线网络中的发射功率控制(TPC)。我们将TPC问题投射为一个动态程序,该程序捕获了发射功率和延迟之间的基本折衷,并使用其解决方案来告知我们的设计。最终的算法让人想起现有的TPC方法,该方法试图使每个链路保持恒定的信噪比(SINR),但有一个关键的区别:依赖队列的退避阈值,允许链路暂时停止干扰过大时进行传输。在高干扰情况下,这种差异使我们的算法能够自动引发类似于时分多址(TDMA)的网络行为,而无需任何明确的交叉链路协调。由于此行为,我们证明了我们的算法与以前的方案相比可以提供实质性的吞吐量改进。

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