Buffer-Aided Cooperative Relays in Orbital Angular Momentum Based IoT Networks

Q3 Engineering Journal of Communications Pub Date : 2024-04-01 DOI:10.12720/jcm.19.4.175-181
Mohammad Alkhawatrah
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Abstract

—Orbital Angular Momentum (OAM) is an essential property of electromagnetic transmission. Nowadays, OAM is popular due to its capabilities to improve the electromagnetic spectrum efficiency which increases throughput. However, employing an OAM-based solution is costly as it suffers wave divergence mainly at high OAM orders (modes). This difficulty limits the distance range for successful communication link, particularly in wireless communication which is essential for realizing Internet of Things (IoT) applications. One of the available solutions to deal with this limitation is utilizing a cooperative relaying system. Relays are known for their potential to shorten the link connecting the source to the destination, as well as provide an alternative link to avoid deep fading. Nonetheless, conventional relaying technique (without buffers) are surpassed by adding buffering capabilities to relays, this enhances the system throughput. In this article, we suggest employing buffer-aided relays in OAM-based networks. Simulation trials show that the proposed buffer-aided relay solution assists the OAM-based network in obtaining higher throughput than its counterpart the traditional relays. The gain of using buffer-aided relays grows as the OAM-based networks become more restricted when they are transmitting at higher OAM orders. Furthermore, at higher thresholds, the rate of successful transmission goes down which degrades the system throughput. The results show that the buffer-aided relays outrun conventional relays at any threshold and the difference in performance becomes greater at more restricted higher thresholds. In addition, the buffer-aided relays help the OAM-based networks achieve lower outage probability than that achieved with traditional relays.
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基于轨道角动量的物联网网络中的缓冲辅助合作中继器
-轨道角动量(OAM)是电磁传输的一项基本特性。如今,OAM 因其能够提高电磁频谱效率从而增加吞吐量而广受欢迎。然而,采用基于 OAM 的解决方案成本高昂,因为它主要在高 OAM 阶数(模式)时出现波发散。这一困难限制了成功通信链路的距离范围,尤其是在无线通信中,而无线通信对于实现物联网(IoT)应用至关重要。利用合作中继系统是解决这一限制的可用方案之一。众所周知,中继系统可以缩短连接信源和目的地的链路,并提供替代链路以避免深度衰减。然而,传统的中继技术(无缓冲器)通过在中继器中添加缓冲功能而得到了超越,从而提高了系统吞吐量。本文建议在基于 OAM 的网络中采用缓冲辅助中继技术。仿真试验表明,建议的缓冲辅助中继解决方案可帮助基于 OAM 的网络获得比传统中继更高的吞吐量。当基于 OAM 的网络以更高的 OAM 阶数进行传输时,使用缓冲辅助中继的收益会随着网络受限程度的增加而增加。此外,阈值越高,传输成功率越低,从而降低了系统吞吐量。结果表明,在任何阈值下,缓冲辅助中继都优于传统中继,而在限制更多的较高阈值下,性能差异会变得更大。此外,缓冲辅助中继有助于基于 OAM 的网络实现比传统中继更低的中断概率。
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来源期刊
Journal of Communications
Journal of Communications Engineering-Electrical and Electronic Engineering
CiteScore
3.40
自引率
0.00%
发文量
29
期刊介绍: JCM is a scholarly peer-reviewed international scientific journal published monthly, focusing on theories, systems, methods, algorithms and applications in communications. It provide a high profile, leading edge forum for academic researchers, industrial professionals, engineers, consultants, managers, educators and policy makers working in the field to contribute and disseminate innovative new work on communications. All papers will be blind reviewed and accepted papers will be published monthly which is available online (open access) and in printed version.
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