Real-World quality of service (QoS) performance in Radio over Fiber (RoF) Networks: Experimental testbed

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-04-20 DOI:10.1016/j.yofte.2025.104223

R. Mohamad , S.M. Idrus , O. Abuajwa , Z. Yusoff , S. Yaakob , P.N. Ja’afar

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引用次数: 0

Abstract

The Radio over Fibre (RoF) downlink system has been designed to coexist with the Passive Optical Network (PON) technology, utilising the wavelength division multiplexing (WDM) method to support fibre-to-the-home (FTTH) installations and deliver high-speed broadband services. The system performance must meet the standards set by the European Telecommunication Standard Institute (ETSI) and telecommunications service providers (TSP) requirements. In this paper, new RoF system is designed to complement the PON deployment based on developing optical line terminal-multipoint radio over fibre (OLT-MROF), Radio Access Unit (RAU), Outdoor Unit (ODU), and RoF broadband terminal unit (RoF-ROF-BTU) using the field programmable gate arrays (FPGA). Then, an experimental testbed on the RoF downlink system in a rural area is conducted to evaluate the quality of service (QoS) measurement for high-speed broadband services, including triple-play services (TPSs): data, voice, and video for Internet Protocol Television (IPTV) at 30 Mbps. The setup focuses on three main QoS parameters: audio or video quality, mean opinion score (MOS), voice quality, jitter, and throughput. To monitor the QoS, measurement tools are employed, and data collection is carried out through both active and passive measurement methods, utilising EXFO-FTB test gear and IxChariot. The findings reveal that 88% of the 24 served users received triple-play services, surpassing the standards set by TSP and ETSI in the RoF-WDM-PON downlink system. The approach demonstrates optimal MOS with maintained voice jitter and consistent throughput at a minimum of 18 Mbps, achieving efficient performance and resource utilisation. The results of the trial-based study showed a significant improvement in packet loss, less than 16.67%, and more than 20.9% improvement in throughput compared to the simulation-based benchmark.

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光纤无线（RoF）网络中的实际服务质量（QoS）性能：实验测试平台

光纤无线（RoF）下行链路系统旨在与无源光网络（PON）技术共存，利用波分复用（WDM）方法支持光纤到户（FTTH）安装并提供高速宽带服务。系统性能必须满足欧洲电信标准协会（ETSI）制定的标准和电信服务提供商（TSP）的要求。本文利用现场可编程门阵列（FPGA）开发了光线路终端-光纤多点无线电（OLT-MROF）、无线接入单元（RAU）、室外单元（ODU）和 RoF 宽带终端单元（RoF-ROF-BTU），在此基础上设计了新的 RoF 系统来补充 PON 部署。然后，在农村地区对 RoF 下行链路系统进行实验测试，以评估高速宽带服务的服务质量（QoS）测量，包括三重播放服务（TPS）：30 Mbps 的数据、语音和网络电视（IPTV）视频。设置的重点是三个主要的 QoS 参数：音频或视频质量、平均意见分（MOS）、语音质量、抖动和吞吐量。为了监测 QoS，使用了测量工具，并利用 EXFO-FTB 测试设备和 IxChariot 通过主动和被动测量方法进行了数据收集。研究结果表明，24 个服务用户中有 88% 获得了三重播放服务，超过了 TSP 和 ETSI 在 RoF-WDM-PON 下行链路系统中设定的标准。该方法在保持语音抖动和最低 18 Mbps 稳定吞吐量的情况下实现了最佳 MOS，达到了高效的性能和资源利用率。基于试验的研究结果表明，与基于模拟的基准相比，丢包率显著改善，小于 16.67%，吞吐量改善超过 20.9%。

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.