Passive Node-Assisted Wireless Networks Forming Raptor Codes with Random Access
DOI:
https://doi.org/10.26636/jtit.2020.138219Keywords:
EXIT chart, passive nodes, PLR, random access, Raptor codes, throughput, wireless networksAbstract
In this paper, wireless networks with passive nodes forming a pre-code of Raptor codes, also known as Raptor code-structured wireless networks (RCS-WN), are considered. In RCS-WN, the passive nodes utilize a decode-and-forward (DF) scheme and send the decoded data to the destination by using a scheduling scheme. We propose to deploy random access (RA) in passive nodes, to achieve a solution referred to as an RA-based RCS-WN (RAR-WN), and attempt to compare it with conventional wireless networks applying irregular repetition slotted ALOHA (IRSA). We investigate regular and irregular degree distributions for repetition codes to test the capacity of the proposed RAR-WN, using the extrinsic information transfer (EXIT) chart. This paper also examines the capabilities of the stopping set (both with regular and irregular degree distribution) in RAR-WN. Performance of the proposed system is evaluated in terms of EXIT chart, packet loss rate (PLR), and throughput. The results show that the proposed system is capable of achieving non-dropped throughput performance.
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Copyright (c) 2020 Denny Kusuma Hendraningrat, I Nyoman Apraz Ramatryana, Bhaskara Narottama
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