Distributed Utility Maximization with Backward Physical Signaling in Interference-Limited Wireless Systems

Hye J. KANG; Chung G. KANG

doi:10.1587/transcom.E98.B.2033

Distributed Utility Maximization with Backward Physical Signaling in Interference-Limited Wireless Systems

Hye J. KANG, Chung G. KANG

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In this paper, we consider a distributed power control scheme that can maximize overall capacity of an interference-limited wireless system in which the same radio resource is spatially reused among different transmitter-receiver pairs. This power control scheme employs a gradient-descent method in each transmitter, which adapts its own transmit power to co-channel interference dynamically to maximize the total weighted sum rate (WSR) of the system over a given interval. The key contribution in this paper is to propose a common feedback channel, over which a backward physical signal is accumulated for computing the gradient of the transmit power in each transmitter, thereby significantly reducing signaling overhead for the distributed power control. We show that the proposed power control scheme can achieve almost 95% of its theoretical upper WSR bound, while outperforming the non-power-controlled system by roughly 63% on average.

Publication: IEICE TRANSACTIONS on Communications Vol.E98-B No.10 pp.2033-2039

Publication Date: 2015/10/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E98.B.2033

Type of Manuscript: PAPER

Category: Network

Authors

Hye J. KANG
Korea University
Chung G. KANG
Korea University

Keyword

distributed power control, interference-limited system, feedback channel, gradient descent, time division duplexing (TDD), backward physical signaling

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Hye J. KANG, Chung G. KANG, "Distributed Utility Maximization with Backward Physical Signaling in Interference-Limited Wireless Systems" in IEICE TRANSACTIONS on Communications, vol. E98-B, no. 10, pp. 2033-2039, October 2015, doi: 10.1587/transcom.E98.B.2033.
Abstract: In this paper, we consider a distributed power control scheme that can maximize overall capacity of an interference-limited wireless system in which the same radio resource is spatially reused among different transmitter-receiver pairs. This power control scheme employs a gradient-descent method in each transmitter, which adapts its own transmit power to co-channel interference dynamically to maximize the total weighted sum rate (WSR) of the system over a given interval. The key contribution in this paper is to propose a common feedback channel, over which a backward physical signal is accumulated for computing the gradient of the transmit power in each transmitter, thereby significantly reducing signaling overhead for the distributed power control. We show that the proposed power control scheme can achieve almost 95% of its theoretical upper WSR bound, while outperforming the non-power-controlled system by roughly 63% on average.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E98.B.2033/_p

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@ARTICLE{e98-b_10_2033,
author={Hye J. KANG, Chung G. KANG, },
journal={IEICE TRANSACTIONS on Communications},
title={Distributed Utility Maximization with Backward Physical Signaling in Interference-Limited Wireless Systems},
year={2015},
volume={E98-B},
number={10},
pages={2033-2039},
abstract={In this paper, we consider a distributed power control scheme that can maximize overall capacity of an interference-limited wireless system in which the same radio resource is spatially reused among different transmitter-receiver pairs. This power control scheme employs a gradient-descent method in each transmitter, which adapts its own transmit power to co-channel interference dynamically to maximize the total weighted sum rate (WSR) of the system over a given interval. The key contribution in this paper is to propose a common feedback channel, over which a backward physical signal is accumulated for computing the gradient of the transmit power in each transmitter, thereby significantly reducing signaling overhead for the distributed power control. We show that the proposed power control scheme can achieve almost 95% of its theoretical upper WSR bound, while outperforming the non-power-controlled system by roughly 63% on average.},
keywords={},
doi={10.1587/transcom.E98.B.2033},
ISSN={1745-1345},
month={October},}

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TY - JOUR
TI - Distributed Utility Maximization with Backward Physical Signaling in Interference-Limited Wireless Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 2033
EP - 2039
AU - Hye J. KANG
AU - Chung G. KANG
PY - 2015
DO - 10.1587/transcom.E98.B.2033
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E98-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2015
AB - In this paper, we consider a distributed power control scheme that can maximize overall capacity of an interference-limited wireless system in which the same radio resource is spatially reused among different transmitter-receiver pairs. This power control scheme employs a gradient-descent method in each transmitter, which adapts its own transmit power to co-channel interference dynamically to maximize the total weighted sum rate (WSR) of the system over a given interval. The key contribution in this paper is to propose a common feedback channel, over which a backward physical signal is accumulated for computing the gradient of the transmit power in each transmitter, thereby significantly reducing signaling overhead for the distributed power control. We show that the proposed power control scheme can achieve almost 95% of its theoretical upper WSR bound, while outperforming the non-power-controlled system by roughly 63% on average.
ER -