Physical Network Coding in Two-Way Wireless Relay Channels

By Petar Popovski, Hiroyuki Yomo. IEEE International Conference on Communications, 2007

692 citations recorded by the source corpus.

It has recently been recognized that the wireless networks represent a fertile ground for devising communication modes based on network coding. A particularly suitable application of the network coding arises for the two-way relay channels, where two nodes communicate with each other assisted by using a third, relay node. Such a scenario enables application of physical network coding, where the network coding is either done (a) jointly with the channel coding or (b) through physical combining of the communication flows over the multiple access channel. In this paper we first group the existing schemes for physical network coding into two generic schemes, termed 3-step and 2-step scheme, respectively. We investigate the conditions for maximization of the two-way rate for each individual scheme: (1) the decode-and-forward (DF) 3-step schemes (2) three different schemes with two steps: amplify-and-forward (AF), JDF and denoise-and-forward (DNF). While the DNF scheme has a potential to offer the best two-way rate, the most interesting result of the paper is that, for some SNR configurations of the source - relay links, JDF yields identical maximal two-way rate as the upper bound on the rate for DNF.

Subfields: Computer Networks and Communications, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/da9e0d4d221f09ef7c13b096aea3523def1fd91d

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In Computer Networks and Communications

In Electrical and Electronic Engineering

Citations in the corpus

Channel coding and decoding in a relay system operated with physical-layer network coding (2008, background): “To the best of our knowledge, the second scheme was first proposed and studied in [5, 6].”
Joint Physical Layer Coding and Network Coding for Bidirectional Relaying (2008, background): “The scheme in this paper is a constructive scheme that performs close to the rate conjectured in [6].”
High-Reliability and Low-Latency Wireless Communication for Internet of Things: Challenges, Fundamentals, and Enabling Technologies (2019, background): “, two-way relay channels [142], [143], multihop unicast [144], and multiple unicast networks [145].”
Practical physical layer network coding for two-way relay channels: performance analysis and comparison (2010, methodology): “In [14], a three time slot PNC scheme was considered using the DF protocol, while in [13], the AF protocol was considered.”
Optimal channel estimation and training design for two-way relay networks (2009, methodology): “Both AF and DF protocols developed for OWRN were extended to the halfduplex TWRN in [9], [10], and to the full-duplex TWRN in [11].”