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      Wireless Network Coding with Imperfect Overhearing

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          Abstract

          Not only is network coding essential to achieve the capacity of a single-session multicast network, it can also help to improve the throughput of wireless networks with multiple unicast sessions when overheard information is available. Most previous research aimed at realizing such improvement by using perfectly overheard information, while in practice, especially for wireless networks, overheard information is often imperfect. To date, it is unclear whether network coding should still be used in such situations with imperfect overhearing. In this paper, a simple but ubiquitous wireless network model with two unicast sessions is used to investigate this problem. From the diversity and multiplexing tradeoff perspective, it is proved that even when overheard information is imperfect, network coding can still help to improve the overall system performance. This result implies that network coding should be used actively regardless of the reception quality of overheard information.

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          Most cited references11

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          Cooperative Diversity in Wireless Networks: Efficient Protocols and Outage Behavior

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            The capacity of wireless networks

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              Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels

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                Author and article information

                Journal
                22 March 2010
                Article
                1003.4270
                84f8a11f-c476-4fda-a39f-13eb8a09ab62

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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                Custom metadata
                21 pages, 6 figures, IEEE Trans. Commun.
                cs.IT math.IT

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