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Title: Digital network coding aided two-way relaying: Energy minimization and queue analysis
Authors: Chen, Z.
Lim, T.J. 
Motani, M. 
Keywords: energy efficiency
network coding
queue stability
Two-way relays
Issue Date: 2013
Citation: Chen, Z., Lim, T.J., Motani, M. (2013). Digital network coding aided two-way relaying: Energy minimization and queue analysis. IEEE Transactions on Wireless Communications 12 (4) : 1947-1957. ScholarBank@NUS Repository.
Abstract: In this paper, we consider a three-node, two-way relay system with digital network coding. The aim is to minimize total energy consumption while ensuring queue stability at all nodes, for a given pair of random packet arrival rates. Specifically, we allow for a set of transmission modes and solve for the optimal fraction of resources allocated to each mode. First, we formulate and solve the static-channel problem, where all link gains are constant over the duration of transmission. Then, we solve the fading-channel problem, where link gains are random. We call the latter the ergodic energy efficiency problem and show that its solution has a water-filling structure. Finally, we provide a detailed analysis of the queues at each node when a random scheduling method that closely approximates the theoretical design is used. © 2002-2012 IEEE.
Source Title: IEEE Transactions on Wireless Communications
ISSN: 15361276
DOI: 10.1109/TWC.2013.022113.121263
Appears in Collections:Staff Publications

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