Network coding-based block acknowledgement scheme for wireless regenerative relay networks

Q.-T. Vien; H.X. Nguyen; J. Choi; B.G. Stewart; H. Tianfield

Network coding-based block acknowledgement scheme for wireless regenerative relay networks

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Network coding-based block acknowledgement scheme for wireless regenerative relay networks

Author(s): Q.-T. Vien ; H.X. Nguyen ; J. Choi ; B.G. Stewart ; H. Tianfield
DOI: 10.1049/iet-com.2011.0681

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Author(s): Q.-T. Vien ¹ ; H.X. Nguyen ² ; J. Choi ³ ; B.G. Stewart ¹ ; H. Tianfield ¹
- Affiliations: 1: School of Engineering and Built Environment, Glasgow Caledonian University, Glasgow, UK
  2: School of Science and Technology, Middlesex University, London, UK
  3: School of Engineering, Swansea University, Swansea, UK
Source: Volume 6, Issue 16, 6 November 2012, p. 2593 – 2601
DOI: 10.1049/iet-com.2011.0681 , Print ISSN 1751-8628, Online ISSN 1751-8636

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This paper is concerned with block acknowledgement (ACK) mechanisms in wireless regenerative relay networks. In an N-relay network, a total of (2N+1) block ACK packets is required to acknowledge the data transmission between source and destination nodes via the N-relay nodes. In this paper, the authors propose a block ACK scheme based on network coding (NC) to significantly reduce the ACK overheads by N block ACK packets. In addition, this achieves a reduction of N(N–1) computational operators. Particularly, we derive the error probability of the determination of the packets to be retransmitted at the source and relays, which shows that the NC-based scheme also improves the reliability of block ACK transmissions. Furthermore, asymptotic signal-to-noise (SNR) scenarios for forward links are considered and a general expression of error probability in multi-relay networks is derived for each SNR scenario. Finally, simulation results are presented to verify the analytical findings and demonstrate a lower number of data retransmissions for a higher system throughput.

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Network coding-based block acknowledgement scheme for wireless regenerative relay networks

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