TY - JOUR
T1 - QoS-Oriented Dynamic Power Allocation in NOMA-Based Wireless Caching Networks
AU - Yin, Yue
AU - Liu, Miao
AU - Gui, Guan
AU - Gacanin, Haris
AU - Sari, Hikmet
AU - Adachi, Fumiyuki
N1 - Funding Information:
Manuscript received July 24, 2020; accepted August 31, 2020. Date of publication September 2, 2020; date of current version January 8, 2021. This work was supported in part by the Major Project of the Ministry of Industry and Information Technology of China under Grant TC190A3WZ-2; in part by the National Natural Science Foundation of China under Grant 61901228; in part by the Six Top Talents Program of Jiangsu under Grant XYDXX-010; and in part by the 1311 Talent Plan of Nanjing University of Posts and Telecommunications. The associate editor coordinating the review of this article and approving it for publication was M. Derakhshani. (Corresponding author: Guan Gui.) Yue Yin, Miao Liu, Guan Gui, and Hikmet Sari are with the College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China (e-mail: 1018010408@njupt.edu.cn; liumiao@njupt.edu.cn; guiguan@njupt.edu.cn; hikmet@njupt.edu.cn).
Publisher Copyright:
© 2012 IEEE.
PY - 2021/1
Y1 - 2021/1
N2 - Non-orthogonal multiple access (NOMA) based wireless caching network (WCN) is considered as a promising technology for next-generation wireless communications since it can significantly improve the spectral efficiency. In this letter, we propose a quality of service (QoS)-oriented dynamic power allocation strategy for NOMA-WCN. In content placement phase, base station (BS) sends multiple files to helpers by allocating different powers according to the different QoS targets of files, for ensuring that all helpers can successfully decode the two most popular files. In content delivery phase, helpers serve two users at the same time by allocating the minimum power to far user according to the QoS requirement, and then all the remaining power is allocated to near user. Hence, our proposed method is able to increase the hit probability and drop the outage probability compared with conventional methods. Simulation results confirm that the proposed power allocation method can significantly improve the caching hit probability and reduce the user outage probability.
AB - Non-orthogonal multiple access (NOMA) based wireless caching network (WCN) is considered as a promising technology for next-generation wireless communications since it can significantly improve the spectral efficiency. In this letter, we propose a quality of service (QoS)-oriented dynamic power allocation strategy for NOMA-WCN. In content placement phase, base station (BS) sends multiple files to helpers by allocating different powers according to the different QoS targets of files, for ensuring that all helpers can successfully decode the two most popular files. In content delivery phase, helpers serve two users at the same time by allocating the minimum power to far user according to the QoS requirement, and then all the remaining power is allocated to near user. Hence, our proposed method is able to increase the hit probability and drop the outage probability compared with conventional methods. Simulation results confirm that the proposed power allocation method can significantly improve the caching hit probability and reduce the user outage probability.
KW - dynamic power allocation
KW - Non-orthogonal multiple access
KW - quality of service
KW - wireless caching networks
UR - http://www.scopus.com/inward/record.url?scp=85099512503&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85099512503&partnerID=8YFLogxK
U2 - 10.1109/LWC.2020.3021204
DO - 10.1109/LWC.2020.3021204
M3 - Article
AN - SCOPUS:85099512503
SN - 2162-2337
VL - 10
SP - 82
EP - 86
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 1
M1 - 9184832
ER -