Achievable Rates for Discrete Memoryless Multicast Networks With and Without Feedback

doi:10.1109/TIT.2018.2789892

	Achievable Rates for Discrete Memoryless Multicast Networks With and Without Feedback
	Youlong Wu
	2018-04
发表期刊	IEEE TRANSACTIONS ON INFORMATION THEORY (IF:2.2[JCR-2023],2.4[5-Year])
ISSN	0018-9448
卷号	64 期号:4 页码:2321-2332
发表状态	已发表
DOI	10.1109/TIT.2018.2789892
摘要	Discrete memoryless multicast network (DM-MN) is considered in this paper. We analyze the lower bounds of noisy network coding (NNC) and distributed decode-forward (DDF) for DM-MN, and show that both NNC and DDF ignore the channel output observed at the transmitter. Motivated by this observation, new coding schemes are proposed to improve NNC and DDF by exploiting the transmitter's observation and applying hybrid relaying strategies. We first study a special case when the transmitter's observation is rate-limited feedback signals, and propose a scheme that strictly improves NNC when feedback rates are sufficiently large. For the relay channel with perfect relay-transmitter feedback, our achievable rate reduces to Gabbai and Bross's rate, which is strictly larger than NNC, DDF, and all known lower bounds on the achievable rates proposed for the setup without feedback. In our scheme, both relays and receivers compress their received signals like NNC, and the relays decode independent "common" and "private" parts of the source message. The generated compression indices are sent to the transmitter through feedback, from which the transmitter reconstructs the receivers' and relays' inputs and can thus cooperate with the receivers and relays. We then extend our idea to DM-MN without feedback. For this case, although the transmitter observes channel output, both NNC and DDF simply ignore it, while our new scheme has the transmitter utilize its channel output to decode a set of relays' and receivers' compression indices, which achieves some cooperation levels between the transmitter and the receivers and relays. An enhanced relay channel is introduced to show that our scheme strictly outperforms NNC and DDF.
关键词	Multicast feedback rate-limited
URL	查看原文
收录类别	SCI ; SCIE ; CPCI
语种	英语
WOS研究方向	Computer Science ; Engineering
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic
WOS记录号	WOS:000427857200010
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS关键词	RELAY CHANNEL ; CAPACITY THEOREMS
原始文献类型	Article ; Proceedings Paper
来源库	IEEE
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/20194
专题	信息科学与技术学院信息科学与技术学院_PI研究组_吴幼龙组
作者单位	School of Information Science and Technology, ShanghaiTech University, Shanghai, China
第一作者单位	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	Youlong Wu. Achievable Rates for Discrete Memoryless Multicast Networks With and Without Feedback[J]. IEEE TRANSACTIONS ON INFORMATION THEORY,2018,64(4):2321-2332.
APA	Youlong Wu.(2018).Achievable Rates for Discrete Memoryless Multicast Networks With and Without Feedback.IEEE TRANSACTIONS ON INFORMATION THEORY,64(4),2321-2332.
MLA	Youlong Wu."Achievable Rates for Discrete Memoryless Multicast Networks With and Without Feedback".IEEE TRANSACTIONS ON INFORMATION THEORY 64.4(2018):2321-2332.