Title: Performance of cooperative relay protocol in 5G mobile communication network over Rayleigh fading channel

Authors: Akinyinka Olukunle Akande; Cosmas Kemdirim Agubor; Wasiu Akande Ahmed; Olalekan Ogunbiyi; Olusola Kunle Akinde

Addresses: Department of Electrical and Electronic Engineering, Federal University of Technology Owerri, P.M.B 1526, Imo State, Nigeria ' Department of Electrical and Electronic Engineering, Federal University of Technology Owerri, P.M.B 1526, Imo State, Nigeria ' SNARS Research Laboratory, Beihang University, Beijing, P.M.B.100191, China ' Department of Electrical and Computer Engineering, Kwara State University, Malete, Ilorin, Nigeria ' Department of Electronic and Electrical Engineering, The First Technical University, Ibadan, Oyo State, Nigeria

Abstract: This paper presents the performance of a new cooperative relay protocol in mobile network over Raleigh environment. Characteristically, the 5G network at 28 GHz covers short distances due to its shorter wavelength. Extending network coverage area and improvement of signal quality is a necessity. In this work, high performance hybrid relay nodes were proposed to improve quality of the signal and increase the signal coverage distance. Mathematical expression was successfully derived for new hybrid decode amplify forward (HDAF) protocol. The destination node combines received symbols from hybrid relay nodes and source node using maximal ratio combiner (MRC) for optimal performance. The performance of the developed model was evaluated using bit error rate (BER), outage probability (P_out) and processing time (P_time) at different signal to noise ratio (SNR). Comparatively the developed HDAF protocol performed better than DF and AF by having a lower BER, P_out and P_time values. The result also shows that HDAF relay protocol has the potential to mitigate signal interference and extend the coverage area in 5G network.

Keywords: 5G network; amplify-forward; bit error rate; BER; mobile network; maximal ratio combiner; MRC; outage probability; processing time; Raleigh; relay nodes; signal to noise ratio; SNR.

DOI: 10.1504/IJMC.2023.131167

International Journal of Mobile Communications, 2023 Vol.21 No.4, pp.494 - 517

Received: 10 Mar 2021
Accepted: 20 Jun 2021
Published online: 01 Jun 2023 *

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