NDLI: Bounds on the Benefit of Network Coding: Throughput and Energy Saving in Wireless Networks

Content Provider	IEEE Xplore Digital Library
Author	Keshavarz-Haddadt, A. Riedi, R.
Copyright Year	2008
Description	Author affiliation: Rice Univ., Houston (Keshavarz-Haddadt, A.)
Abstract	In this paper we establish fundamental limitations to the benefit of network coding in terms of energy and throughput in multihop wireless networks. Thereby we adopt two well accepted scenarios in the field: single multicast session and multiple unicast sessions. Most of our results apply to arbitrary wireless network and are, in particular, not asymptotic in kind. In terms of throughput and energy saving we prove that the gain of network coding of a single multicast session is at most a constant factor. Also, we present a lower bound on the expected number of transmissions of multiple unicast sessions under an arbitrary network coding. We identify scenarios for which the network coding gain for energy saving becomes surprisingly close to 1, in some cases even exactly 1, corresponding to no benefit at all. Interestingly, we prove that the gain of network coding in terms of transport capacity is bounded by a constant factor pi in any arbitrary wireless network and for all traditional channel models. This shows that the traditional bounds on the transport capacity [1]-[4] do not change more than constant factor pi if we employ network coding. As a corollary, we find that the gain of network coding on the throughput of large scale homogeneous wireless networks is asymptotically bounded by a constant. Note that our result is more general than the previous work [5] and it is obtained by a different technique. In conclusion, we show that in contrast to wired networks, the network coding gain in wireless networks is constraint by fundamental limitations.
Starting Page	376
Ending Page	384
File Size	342448
Page Count	9
File Format	PDF
ISBN	9781424420254
ISSN	0743166X
DOI	10.1109/INFOCOM.2008.84
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Network coding Throughput Wireless networks Unicast Energy consumption Wireless sensor networks Wireless mesh networks Mesh networks Communications Society Statistics
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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