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On the effective energy efficiency of ultra-reliable networks in the finite blocklength regime

Shehab, Mohammad; Dosti, Endrit; Alves, Hirley; Latva-aho, Matti (2017-11-16)

 
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https://doi.org/10.1109/ISWCS.2017.8108124

Shehab, Mohammad
Dosti, Endrit
Alves, Hirley
Latva-aho, Matti
Institute of Electrical and Electronics Engineers
16.11.2017

M. Shehab, E. Dosti, H. Alves and M. Latva-aho, "On the effective energy efficiency of ultra-reliable networks in the finite blocklength regime," 2017 International Symposium on Wireless Communication Systems (ISWCS), Bologna, 2017, pp. 275-280. doi: 10.1109/ISWCS.2017.8108124

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doi:https://doi.org/10.1109/ISWCS.2017.8108124
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Abstract

Effective Capacity (EC) indicates the maximum communication rate subject to a certain delay constraint while effective energy efficiency (EEE) denotes the ratio between EC and power consumption. In this paper, we analyze the EEE of ultra-reliable networks operating in the finite blocklength regime. We obtain a closed form approximation for the EEE in Rayleigh block fading channels as a function of power, error probability, and delay. We show the optimum power allocation strategy for maximizing the EEE in finite blocklength transmission which reveals that Shannon’s model underestimates the optimum power when compared to the exact finite blocklength model. Further-more, we characterize the buffer constrained EEE maximization problem for different power consumption models. The results show that accounting for empty buffer probability (EBP) and extending the maximum delay tolerance jointly enhance the EC and EEE.

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