Multihop compute-and-forward for generalised two-way relay channels

Wang, Gengkun and Xiang, Wei and Yuan, Jinhong (2015) Multihop compute-and-forward for generalised two-way relay channels. Transactions on Emerging Telecommunications Technologies, 26 (3). pp. 448-460.


The compute-and-forward (CaF) relaying strategy recently proposed by Nazer and Gastpar has been proven to achieve significant improvements in 'computation rate' than conventional relaying strategies in the multiple-access channel. Although there have been some recent efforts on the implementations of CaF, to the best of our knowledge, there has been no published work that analyzes the outage performance of CaF in the multi-hop two-way relay channel (MH-TRC). In this paper, we extend the original CaF strategy to multi-hop CaF (MH-CaF), and investigate the outage performance of the proposed MH-CaF in the generalized MH-TRC. The transmission strategy of MH-CaF for the L-node K-message MH-TRC is generalized. The network throughput of MH-CaF is proven to be significantly better than the non-network coding (Non-NC) scheme for the MH-TRC with a large number of messages. The outage probabilities for both Non-NC and MH-CaF schemes are derived for comparison. Numerical results show that for a five-node MH-TRC, MH-CaF can achieve a better outage performance than Non-NC when the number of messages is less than 12. Furthermore, it is also demonstrated that MH-CaF is always superior to Non-NC in outage performance when the number of nodes of the MH-TRC is relatively large.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright © 2013 John Wiley & Sons, Ltd. Permanent restricted access to Published version due to publisher copyright policy.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 29 May 2013 00:33
Last Modified: 22 Feb 2019 05:53
Uncontrolled Keywords: Multi-hop compute-and-forward; two-way relay channel; computation rate; outage probability
Fields of Research : 10 Technology > 1005 Communications Technologies > 100503 Computer Communications Networks
08 Information and Computing Sciences > 0801 Artificial Intelligence and Image Processing > 080110 Simulation and Modelling
10 Technology > 1005 Communications Technologies > 100510 Wireless Communications
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970110 Expanding Knowledge in Technology
Identification Number or DOI: 10.1002/ett.2644

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