Revisiting two-way channel: Opportunistic network coding scheduling in fading channels

Author

Zhi Chen ; Pingyi Fan ; Ben Letaief, Khaled

fYear

2013

fDate

1-4 April 2013

Firstpage

169

Lastpage

174

Abstract

For two-way relaying networks, it was proved that independent fading characteristics of each link has negative impact on network coding gain. We hence further investigate fading characteristic of the two-way links and find a deterministic threshold in theory on the scheduling between network coding broadcasting and one side forwarding transmission for digital network coding (DNC) in the downlink. Based on this observation, a new power allocation policy is proposed to improve the sum rate in the downlink. In addition, system stability are investigated and some explicit bounds on average queuing length at relay are derived. Finally, unequal slot assignment for each phase as well as the associated end to end throughput are investigated to combat bottleneck link effect.

Keywords

fading channels; network coding; queueing theory; radio links; relay networks (telecommunication); scheduling; combat bottleneck link effect; deterministic threshold; digital network coding gain; fading channels; independent fading characteristics; negative impact; network coding broadcasting; one side forwarding transmission; opportunistic network coding scheduling; power allocation policy; queuing length; system stability; two-way channel; two-way links; two-way relaying networks; unequal slot assignment; Downlink; Fading; Network coding; Relays; Resource management; Signal to noise ratio; Throughput; Two-way; fairness; network coding; queue length; resource allocation;

fLanguage

English

Publisher

ieee

Conference_Titel

Computing, Communications and IT Applications Conference (ComComAp), 2013

Conference_Location

Hong Kong

Print_ISBN

978-1-4673-6043-2

Type

conf

DOI

10.1109/ComComAp.2013.6533630

Filename

6533630