Autonomous Relaying Scheme with Minimum User Power Consumption in Cooperative Multicast Communications

TY - JOUR

T1 - Autonomous Relaying Scheme with Minimum User Power Consumption in Cooperative Multicast Communications

AU - Zhao, Guodong

AU - Shi, Wuyu

AU - Chen, Zhi

AU - Zhang, Qi

PY - 2016/4

Y1 - 2016/4

N2 - In this paper, we propose a probability-based relay selection and power control method in two-phase cooperative multicast communications to minimize the user power consumption for any given multicast data rate. Our method gives each user the ability to autonomously decide whether to participate in the relay transmission based on an active probability. In particular, we develop an optimal algorithm to calculate the optimal active probability and relay power by balancing the outage reduction efficiency. We also develop a sub-optimal algorithm by balancing the outage probability of the cell-center and the cell-edge users. Simulation results demonstrate that the proposed optimal and sub-optimal algorithms can reduce the user power consumption up to about 54% and 40%, respectively, compared with the conventional algorithm that requires all users to participate in the relay transmission.

AB - In this paper, we propose a probability-based relay selection and power control method in two-phase cooperative multicast communications to minimize the user power consumption for any given multicast data rate. Our method gives each user the ability to autonomously decide whether to participate in the relay transmission based on an active probability. In particular, we develop an optimal algorithm to calculate the optimal active probability and relay power by balancing the outage reduction efficiency. We also develop a sub-optimal algorithm by balancing the outage probability of the cell-center and the cell-edge users. Simulation results demonstrate that the proposed optimal and sub-optimal algorithms can reduce the user power consumption up to about 54% and 40%, respectively, compared with the conventional algorithm that requires all users to participate in the relay transmission.

KW - Cooperative multicast

KW - energy efficiency

KW - outage probability

KW - power control

KW - relay selection

UR - http://www.scopus.com/inward/record.url?scp=84963830360&partnerID=8YFLogxK

U2 - 10.1109/TWC.2015.2504523

DO - 10.1109/TWC.2015.2504523

M3 - Journal article

SN - 1536-1276

VL - 15

SP - 2509

EP - 2522

JO - I E E E Transactions on Wireless Communications

JF - I E E E Transactions on Wireless Communications

IS - 4

M1 - 7342975

ER -