利用宽带和差分cqi之间的相关性进行自适应和反馈

Vineeth Kumar, N. Mehta
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引用次数: 0

摘要

差分信道质量指标(CQI)和宽带CQI是4G和5G标准的关键组成部分。它们使基站(BS)能够获取对速率适应和调度至关重要的信道状态信息,而不会使上行链路过载。我们提出了一种新的吞吐量最优速率自适应规则,该规则利用差分和宽带cqi之间的相关性来提高吞吐量,而无需任何额外的反馈,并提出了一种计算效率高的方法来评估它。然后,我们提出了一种新的灵活开销差分CQI反馈方案,其中反馈比特的数量可以是子带特定的。这两种方法的结合为BS提供了新的灵活性来控制反馈开销,并实现了与反馈少得多的传统方法相当的吞吐量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploiting Correlation Between Wideband and Differential CQIs for Adaptation and Feedback
Differential channel quality indicator (CQI) and wideband CQI are key components of the 4G and 5G standards. They enable a base station (BS) to acquire channel state information that is essential for rate adaptation and scheduling without overwhelming the uplink. We present a novel throughput-optimal rate adaptation rule, which exploits the correlation between the differential and wideband CQIs to improve throughput without any additional feedback, and a computationally efficient approach to evaluate it. We then propose a novel flexible-overhead differential CQI feedback scheme, in which the number of feedback bits can be subband-specific. The combination of the two approaches provides a new flexibility to the BS to control the feedback overhead and achieves a throughput comparable to conventional approaches with much less feedback.
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