Coded Caching for Broadcast Networks with User Cooperation

doi:10.3390/e24081034

	Coded Caching for Broadcast Networks with User Cooperation
	Huang, Zhenhao1 ; Chen, Jiahui1 ; You, Xiaowen1 ; Ma, Shuai 2; Wu, Youlong1
	2022-08
发表期刊	ENTROPY (IF:2.1[JCR-2023],2.2[5-Year])
EISSN	1099-4300
卷号	24 期号:8
发表状态	已发表
DOI	10.3390/e24081034
摘要	Caching technique is a promising approach to reduce the heavy traffic load and improve user latency experience for the Internet of Things (IoT). In this paper, by exploiting edge cache resources and communication opportunities in device-to-device (D2D) networks and broadcast networks, two novel coded caching schemes are proposed that greatly reduce transmission latency for the centralized and decentralized caching settings, respectively. In addition to the multicast gain, both schemes obtain an additional cooperation gain offered by user cooperation and an additional parallel gain offered by the parallel transmission among the server and users. With a newly established lower bound on the transmission delay, we prove that the centralized coded caching scheme is order-optimal, i.e., achieving a constant multiplicative gap within the minimum transmission delay. The decentralized coded caching scheme is also order-optimal if each user's cache size is larger than a threshold which approaches zero as the total number of users tends to infinity. Moreover, theoretical analysis shows that to reduce the transmission delay, the number of users sending signals simultaneously should be appropriately chosen according to the user's cache size, and always letting more users send information in parallel could cause high transmission delay.
关键词	coded cache cooperation device-to-device transmission delay
URL	查看原文
收录类别	SCI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China[61901267]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000845944900001
出版者	MDPI
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/226376
专题	信息科学与技术学院_博士生信息科学与技术学院_PI研究组_吴幼龙组信息科学与技术学院_硕士生信息科学与技术学院_本科生
通讯作者	Wu, Youlong
作者单位	1.ShanghaiTech Univ, Sch Informat Sci & Technol, 393 Huaxia Middle Rd, Shanghai 201210, Peoples R China 2.Telecom Paris, Informat Proc & Commun Lab, IP Paris, F-91120 Palaiseau, France
第一作者单位	信息科学与技术学院
通讯作者单位	信息科学与技术学院
第一作者的第一单位	信息科学与技术学院
推荐引用方式 GB/T 7714	Huang, Zhenhao,Chen, Jiahui,You, Xiaowen,et al. Coded Caching for Broadcast Networks with User Cooperation[J]. ENTROPY,2022,24(8).
APA	Huang, Zhenhao,Chen, Jiahui,You, Xiaowen,Ma, Shuai,&Wu, Youlong.(2022).Coded Caching for Broadcast Networks with User Cooperation.ENTROPY,24(8).
MLA	Huang, Zhenhao,et al."Coded Caching for Broadcast Networks with User Cooperation".ENTROPY 24.8(2022).