Real-time optical-wireless cooperative switching on wireless quality degradation for end-to-end video delay guarantee

IF 4 2区 计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Journal of Optical Communications and Networking Pub Date : 2024-09-19 DOI:10.1364/JOCN.522729
Hirotaka Ujikawa;Yuka Okamoto;Takumi Harada;Tatsuya Shimada;Tomoaki Yoshida
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Abstract

This paper proposes an optical-wireless cooperative control method to guarantee end-to-end delays in the case of radio quality degradation in wireless networks by switching optical paths. The method leverages the control information from mobile systems to dynamically switch the optical path between the distributed unit (DU) and the far aggregated central unit (CU) to another path forward to the nearest virtualized central unit (vCU) at the edge sight, on the basis of the radio quality. This enables demanding applications that require a combination of high bandwidth and low latency, such as remote operation using drones. Preliminary simulations were conducted to investigate the effect of quality degradation in the wireless domain and the potential effectiveness of the proposed delay compensation method. In the experiments conducted to verify the feasibility of the proposed method, the results demonstrated that the optical path switching was successfully performed without packet loss and within 4 ms from the transmission of the control frame. The proposed method was also able to correctly switch back when the processing rate of mobile edge computing (MEC) was exceeded after the radio quality recovered. This study demonstrates the effectiveness of further coordination between wired and wireless control for a wider range of real-time applications using video.
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针对无线质量下降的实时光-无线协同切换,实现端到端视频延迟保证
本文提出了一种光-无线协同控制方法,通过切换光路来保证无线网络中无线电质量下降时的端到端延迟。该方法利用移动系统的控制信息,根据无线电质量,动态地将分布式单元(DU)和远端汇聚中央单元(CU)之间的光路径切换到另一条路径,再转发到边缘视线处最近的虚拟中央单元(vCU)。这样就能实现要求高带宽和低延迟相结合的苛刻应用,例如使用无人机进行远程操作。我们进行了初步模拟,以研究无线领域质量下降的影响和拟议延迟补偿方法的潜在有效性。为验证所提方法的可行性而进行的实验结果表明,光路切换在控制帧传输后 4 毫秒内成功完成,且无数据包丢失。在无线电质量恢复后,当超过移动边缘计算(MEC)的处理速度时,所提出的方法也能正确地切换回来。这项研究表明,在更广泛的实时视频应用中进一步协调有线和无线控制是有效的。
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来源期刊
CiteScore
9.40
自引率
16.00%
发文量
104
审稿时长
4 months
期刊介绍: The scope of the Journal includes advances in the state-of-the-art of optical networking science, technology, and engineering. Both theoretical contributions (including new techniques, concepts, analyses, and economic studies) and practical contributions (including optical networking experiments, prototypes, and new applications) are encouraged. Subareas of interest include the architecture and design of optical networks, optical network survivability and security, software-defined optical networking, elastic optical networks, data and control plane advances, network management related innovation, and optical access networks. Enabling technologies and their applications are suitable topics only if the results are shown to directly impact optical networking beyond simple point-to-point networks.
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