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Transmit Power Optimization and Feasibility Analysis of Self-backhauling Full-Duplex Radio Access Systems

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Transmit Power Optimization and Feasibility Analysis of Self-backhauling Full-Duplex Radio Access Systems. / Korpi, Dani; Riihonen, Taneli; Sabharwal, Ashutosh; Valkama, Mikko.

In: IEEE Transactions on Wireless Communications, Vol. 17, No. 6, 2018, p. 4219-4236.

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Korpi, Dani ; Riihonen, Taneli ; Sabharwal, Ashutosh ; Valkama, Mikko. / Transmit Power Optimization and Feasibility Analysis of Self-backhauling Full-Duplex Radio Access Systems. In: IEEE Transactions on Wireless Communications. 2018 ; Vol. 17, No. 6. pp. 4219-4236.

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@article{270cedef402740dc83e6c1113ac71c30,
title = "Transmit Power Optimization and Feasibility Analysis of Self-backhauling Full-Duplex Radio Access Systems",
abstract = "We analyze an inband full-duplex access node that is serving mobile users while simultaneously connecting to a core network over a wireless backhaul link, utilizing the same frequency band for all communication tasks. Such wireless self-backhauling is an intriguing option for the next generation wireless systems since a wired backhaul connection might not be economically viable if the access nodes are deployed densely. In particular, we derive the optimal transmit power allocation for such a system in closed form under Quality-of-Service (QoS) requirements, which are defined in terms of the minimum data rates for each mobile user. For comparison, the optimal transmit power allocation is solved also for two reference scenarios: a purely half-duplex access node, and a relay-type full-duplex access node. Based on the obtained expressions for the optimal transmit powers, we then show that the systems utilizing a full-duplex capable access node have a fundamental feasibility boundary, meaning that there are circumstances under which the QoS requirements cannot be fulfilled using finite transmit powers. This fundamental feasibility boundary is also derived in closed form. The feasibility boundaries and optimal transmit powers are then numerically evaluated in order to compare the different communication schemes. In general, utilizing the purely full-duplex access node results in the lowest transmit powers for all the communicating parties, although there are some network geometries under which such a system is not capable of reaching the required minimum data rates. In addition, the numerical results indicate that a full-duplex capable access node is best suited for relatively small cells.",
keywords = "full-duplex wireless, massive MIMO, Self-backhauling, transmit power optimization",
author = "Dani Korpi and Taneli Riihonen and Ashutosh Sabharwal and Mikko Valkama",
year = "2018",
doi = "10.1109/TWC.2018.2821682",
language = "English",
volume = "17",
pages = "4219--4236",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers",
number = "6",

}

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TY - JOUR

T1 - Transmit Power Optimization and Feasibility Analysis of Self-backhauling Full-Duplex Radio Access Systems

AU - Korpi, Dani

AU - Riihonen, Taneli

AU - Sabharwal, Ashutosh

AU - Valkama, Mikko

PY - 2018

Y1 - 2018

N2 - We analyze an inband full-duplex access node that is serving mobile users while simultaneously connecting to a core network over a wireless backhaul link, utilizing the same frequency band for all communication tasks. Such wireless self-backhauling is an intriguing option for the next generation wireless systems since a wired backhaul connection might not be economically viable if the access nodes are deployed densely. In particular, we derive the optimal transmit power allocation for such a system in closed form under Quality-of-Service (QoS) requirements, which are defined in terms of the minimum data rates for each mobile user. For comparison, the optimal transmit power allocation is solved also for two reference scenarios: a purely half-duplex access node, and a relay-type full-duplex access node. Based on the obtained expressions for the optimal transmit powers, we then show that the systems utilizing a full-duplex capable access node have a fundamental feasibility boundary, meaning that there are circumstances under which the QoS requirements cannot be fulfilled using finite transmit powers. This fundamental feasibility boundary is also derived in closed form. The feasibility boundaries and optimal transmit powers are then numerically evaluated in order to compare the different communication schemes. In general, utilizing the purely full-duplex access node results in the lowest transmit powers for all the communicating parties, although there are some network geometries under which such a system is not capable of reaching the required minimum data rates. In addition, the numerical results indicate that a full-duplex capable access node is best suited for relatively small cells.

AB - We analyze an inband full-duplex access node that is serving mobile users while simultaneously connecting to a core network over a wireless backhaul link, utilizing the same frequency band for all communication tasks. Such wireless self-backhauling is an intriguing option for the next generation wireless systems since a wired backhaul connection might not be economically viable if the access nodes are deployed densely. In particular, we derive the optimal transmit power allocation for such a system in closed form under Quality-of-Service (QoS) requirements, which are defined in terms of the minimum data rates for each mobile user. For comparison, the optimal transmit power allocation is solved also for two reference scenarios: a purely half-duplex access node, and a relay-type full-duplex access node. Based on the obtained expressions for the optimal transmit powers, we then show that the systems utilizing a full-duplex capable access node have a fundamental feasibility boundary, meaning that there are circumstances under which the QoS requirements cannot be fulfilled using finite transmit powers. This fundamental feasibility boundary is also derived in closed form. The feasibility boundaries and optimal transmit powers are then numerically evaluated in order to compare the different communication schemes. In general, utilizing the purely full-duplex access node results in the lowest transmit powers for all the communicating parties, although there are some network geometries under which such a system is not capable of reaching the required minimum data rates. In addition, the numerical results indicate that a full-duplex capable access node is best suited for relatively small cells.

KW - full-duplex wireless

KW - massive MIMO

KW - Self-backhauling

KW - transmit power optimization

U2 - 10.1109/TWC.2018.2821682

DO - 10.1109/TWC.2018.2821682

M3 - Article

VL - 17

SP - 4219

EP - 4236

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 6

ER -