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Reliability and Local Delay in Wireless Networks: Does Bandwidth Partitioning Help?

Sanket Sanjay Kalamkar 1
1 DYOGENE - Dynamics of Geometric Networks
DI-ENS - Département d'informatique de l'École normale supérieure, CNRS - Centre National de la Recherche Scientifique : UMR 8548, Inria de Paris
Abstract : This paper studies the effect of bandwidth partitioning (BWP) on the reliability and delay performance in infrastructureless wireless networks. The reliability performance is characterized by the density of concurrent transmissions that satisfy a certain reliability (outage) constraint and the delay performance by so-called local delay, defined as the average number of time slots required to successfully transmit a packet. We concentrate on the ultrareliable regime where the target outage probability is close to 0. BWP has two conflicting effects: while the interference is reduced as the concurrent transmissions are divided over multiple frequency bands, the signal-to-interference ratio (SIR) requirement is increased due to smaller allocated bandwidth if the data rate is to be kept constant. Instead, if the SIR requirement is to be kept the same, BWP reduces the data rate and in turn increases the local delay. For these two approaches with adaptive and fixed SIR requirements, we derive closed-form expressions of the local delay and the maximum density of reliable transmissions in the ultrareliable regime. Our analysis shows that, in the ultrareliable regime, BWP leads to the reliability-delay tradeoff.
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Submitted on : Tuesday, December 17, 2019 - 8:30:41 PM
Last modification on : Thursday, July 1, 2021 - 5:58:08 PM
Long-term archiving on: : Wednesday, March 18, 2020 - 7:42:43 PM

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Sanket Sanjay Kalamkar. Reliability and Local Delay in Wireless Networks: Does Bandwidth Partitioning Help?. GLOBECOM 2019 - IEEE Global Communications Conference, Dec 2019, Waikoloa, Hawaii, United States. ⟨hal-02416870⟩

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