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http://arxiv.org/pdf/1508.0435...
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arXiv.org e-Print Archive
Preprint . 2015
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https://doi.org/10.1109/allert...
Article . 2015 . Peer-reviewed
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https://dx.doi.org/10.48550/ar...
Article . 2015
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https://dx.doi.org/10.1109/all...
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Informational bottlenecks in two-unicast wireless networks with delayed CSIT

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Conference object 01 Sep 2015Embargo end date: 01 Jan 2015Publisher:IEEEJournal:2015 53rd Annual Allerton Conference on Communication, Control, and Computing (Allerton)
Authors: Alireza Vahid; Ilan Shomorony; A. Robert Calderbank;

doi: 10.1109/allerton.2015.7447152 , 10.48550/arxiv.1508.04359

arXiv: 1508.04359

Informational bottlenecks in two-unicast wireless networks with delayed CSIT

Abstract

We study the impact of delayed channel state information at the transmitters (CSIT) in two-unicast wireless networks with a layered topology and arbitrary connectivity. We introduce a technique to obtain outer bounds to the degrees-of-freedom (DoF) region through the new graph-theoretic notion of bottleneck nodes. Such nodes act as informational bottlenecks only under the assumption of delayed CSIT, and imply asymmetric DoF bounds of the form $mD_1 + D_2 \leq m$. Combining this outer-bound technique with new achievability schemes, we characterize the sum DoF of a class of two-unicast wireless networks, which shows that, unlike in the case of instantaneous CSIT, the DoF of two-unicast networks with delayed CSIT can take an infinite set of values.

In proceedings of the 53rd Annual Allerton Conference on Communication, Control, and Computing

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Keywords

FOS: Computer and information sciences, Computer Science - Information Theory, Information Theory (cs.IT)

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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Average
Average
Average
Green