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arXiv 1902.07064cs.ITmath.IT
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机器类型通信的有效容量和功率分配

Effective Capacity and Power Allocation for Machine-Type Communication

Mohammad Shehab, Hirley Alves, Matti Latva-aho

摘要:

有效容量(EC)决定了在特定时延约束下的最大通信速率。在这项工作中,我们分析了EC的超可靠的机器类型通信(MTC)网络在有限块长度(FB)制度。首先,我们提出了一个封闭的形式近似EC准静态瑞利衰落信道。我们的分析确定了上界EC和延迟约束时,不同的传输功率。最后,我们的特点是固定EC的功率延迟权衡,并提出了一个最佳的功率分配方案,利用EC在高信噪比制度的渐近行为。结果表明,该方案提供了显着的节能与EC的损失可以忽略不计。

英文摘要:

Effective capacity (EC) determines the maximum communication rate subject to a particular delay constraint. In this work, we analyze the EC of ultra reliable Machine Type Communication (MTC) networks operating in the finite blocklength (FB) regime. First, we present a closed form approximation for EC in quasi-static Rayleigh fading channels. Our analysis determines the upper bounds for EC and delay constraint when varying transmission power. Finally, we characterize the power-delay trade-off for fixed EC and propose an optimum power allocation scheme which exploits the asymptotic behavior of EC in the high SNR regime. The results illustrate that the proposed scheme provides significant power saving with a negligible loss in EC.

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