NDLI: Cut-set bound for multimessage multicast networks with independent channels and zero-delay edges

Content Provider	IEEE Xplore Digital Library
Author	Fong, S.L.
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore (Fong, S.L.)
Abstract	We consider a communication network consisting of nodes and directed edges that connect the nodes. Each edge receives a symbol from a node and outputs a symbol to a node in each time slot. An edge (ℓ, i) terminating at node i is said to incur zero delay on an edge (i, j) originating from node i if the following holds in each time slot: Node i receives the symbol output from (ℓ, i) before encoding the symbol to be transmitted on (i, j). Otherwise, (ℓ, i) is said to incur a delay on (i, j). In the classical model, every edge incurs a unit delay on every other edge and the cut-set bound is a well-known outer bound on the capacity region. However, if an edge is allowed to incur zero delay on another edge, then there exists a two-node network whose capacity region exceeds the classical cut-set bound. In this paper, we investigate the multimessage multicast network (MMN) consisting of independent channels and study the capacity region under an edge-delay model where an edge may incur zero delay on some other edges. Our edge-delay model subsumes the classical model. Our result reveals that the capacity region of the MMN with independent channels and zero-delay edges lies within the classical cut-set bound despite a violation of the classical unit-delay assumption.
Starting Page	2857
Ending Page	2861
File Size	468040
Page Count	5
File Format	PDF
ISSN	21578117
e-ISBN	9781467377041
DOI	10.1109/ISIT.2015.7282978
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-14
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delays Encoding Xenon Random variables Relay networks (telecommunications) Monte Carlo methods Interference
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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