NDLI: On the average performance of caching and coded multicasting with random demands

Content Provider	IEEE Xplore Digital Library
Author	Mingyue Ji Tulino, A.M. Llorca, J. Caire, G.
Copyright Year	2014
Description	Author affiliation: EE Dept., Univ. of Southern California, Los Angeles, CA, USA (Mingyue Ji; Caire, G.) \|\| Bell Labs., Alcatel Lucent, Holmdel, NJ, USA (Tulino, A.M.; Llorca, J.)
Abstract	For a network with one sender, n receivers (users) and m possible messages (files), caching side information at the users allows to satisfy arbitrary simultaneous demands by sending a common (multicast) coded message. In the worst-case demand setting, explicit deterministic and random caching strategies and explicit linear coding schemes have been shown to be order optimal. In this work, we consider the same scenario where the user demands are random i.i.d., according to a Zipf popularity distribution. In this case, we pose the problem in terms of the minimum average number of equivalent message transmissions. We present a novel decentralized random caching placement and a coded delivery scheme which are shown to achieve order-optimal performance. As a matter of fact, this is the first order-optimal result for the caching and coded multicasting problem in the case of random demands.
Starting Page	922
Ending Page	926
File Size	789992
Page Count	5
File Format	PDF
ISBN	9781479958634
DOI	10.1109/ISWCS.2014.6933485
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-08-26
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Upper bound Multicast communication Throughput Encoding Libraries Indexes
Content Type	Text
Resource Type	Article

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