TUTCRIS Research Portal

TY - JOUR

T1 - Joint Optimization of Communication and Traffic Efficiency in Vehicular Networks

AU - Zhao, Long

AU - Wang, Fangfei

AU - Zheng, Kan

AU - Riihonen, Taneli

PY - 2019/2/1

Y1 - 2019/2/1

N2 - Consider single-cell downlink vehicular networks, where a base station (BS) employing massive multiple-input multiple-output simultaneously transmits information to multiple vehicles on its covered road. Taking into account both the traffic and communication performance, the Flow rate of vehicles to the Power consumption of the BS Ratio (FPR) is defined as a comprehensive metric to represent the number of vehicles supported under limited transmit power. The objective of this paper is to maximize the FPR while guaranteeing the information rate requirements of the vehicles. We first derive the average power consumption of the BS with respect to vehicle density, based on which the FPR is established by using a flow rate function that quantifies the number of passed vehicles per time unit in terms of traffic density. Then, the optimal vehicle density is given in order to maximize the FPR. Simulation results indicate that the proposed scheme can significantly improve the power efficiency of the vehicular networks.

AB - Consider single-cell downlink vehicular networks, where a base station (BS) employing massive multiple-input multiple-output simultaneously transmits information to multiple vehicles on its covered road. Taking into account both the traffic and communication performance, the Flow rate of vehicles to the Power consumption of the BS Ratio (FPR) is defined as a comprehensive metric to represent the number of vehicles supported under limited transmit power. The objective of this paper is to maximize the FPR while guaranteeing the information rate requirements of the vehicles. We first derive the average power consumption of the BS with respect to vehicle density, based on which the FPR is established by using a flow rate function that quantifies the number of passed vehicles per time unit in terms of traffic density. Then, the optimal vehicle density is given in order to maximize the FPR. Simulation results indicate that the proposed scheme can significantly improve the power efficiency of the vehicular networks.

KW - cellular radio

KW - MIMO communication

KW - optimisation

KW - power consumption

KW - road traffic

KW - road vehicles

KW - vehicular ad hoc networks

KW - joint optimization

KW - single-cell downlink vehicular networks

KW - base station

KW - massive multiple-input multiple-output

KW - multiple vehicles

KW - covered road

KW - communication performance

KW - FPR

KW - transmit power

KW - information rate requirements

KW - average power consumption

KW - flow rate function

KW - traffic density

KW - optimal vehicle density

KW - power efficiency

KW - BS ratio

KW - passed vehicles-per-time unit

KW - Power demand

KW - Roads

KW - Fading channels

KW - Measurement

KW - Optimization

KW - Downlink

KW - Base stations

KW - Vehicular networks

KW - flow rate

U2 - 10.1109/TVT.2018.2886348

DO - 10.1109/TVT.2018.2886348

M3 - Article

VL - 68

SP - 2014

EP - 2018

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

SN - 0018-9545

IS - 2

ER -