[2023 - 2025]

@article{ITO2025108157,

title = {A multipath redundancy communication framework for enhancing 5G mobile communication quality},

author = {Koki Ito and Jin Nakazato and Romain Fontugne and Manabu Tsukada and Hiroshi Esaki},

url = {https://www.sciencedirect.com/science/article/pii/S0140366425001148},

doi = {https://doi.org/10.1016/j.comcom.2025.108157},

issn = {0140-3664},

year  = {2025},

date = {2025-04-23},

urldate = {2025-04-23},

journal = {Computer Communications},

pages = {108157},

abstract = {As networks increasingly become the backbone of modern society, the demands placed on them by various applications have become more complex. In particular, the demand for high-capacity, low-latency services such as real-time streaming is increasing every year. Although 5G has been deployed to meet these needs, its effectiveness can vary significantly by location and time, and sometimes falls short of requirements. Traditionally, much of the research to improve communication stability has focused on TCP-based systems, which do not translate well to real-time UDP streaming applications. To address the above challenges, we propose a multipath redundant communication framework designed to improve the quality of real-time media streaming. This framework has been tested using multipath redundant communication over two mobile networks with a moving vehicle in an urban environment. Using a real-time streaming application based on WebRTC, our framework demonstrates a significant reduction in packet loss and an increase in bitrate, outperforming existing multipath redundant communication systems without interfering with the application’s congestion control mechanisms.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Nakazato2023,

title = {WebRTC over 5G: A Study of Remote Collaboration QoS in Mobile Environment},

author = {Jin Nakazato and Kousuke Nakagawa and Koki Ito and Romain Fontugne and Manabu Tsukada and Hiroshi Esaki},

url = {https://link.springer.com/content/pdf/10.1007/s10922-023-09778-5.pdf},

doi = {10.1007/s10922-023-09778-5},

issn = {1573-7705},

year  = {2023},

date = {2023-10-24},

urldate = {2023-10-24},

journal = {Journal of Network and Systems Management},

volume = {32},

issue = {1},

abstract = {The increasing demand for remote collaboration and remote working has become crucial to daily life owing to the Covid-19 pandemic and the development of internet-based video distribution services. Furthermore, low-latency remote collaboration, such as teleoperation and support applications designed for in-vehicle environments, has gained considerable attention. The 5G technology is considered as a key infrastructure for remote collaboration. This study aimed to evaluate the actual 5G capability to achieve high quality of service (QoS) for remote collaboration. We designed and implemented a measurement tool to monitor the QoS of remote collaboration under real-world 5G conditions. We performed measurements encompassing the various 5G frequency bands. During these experiments, we employed various tools to obtain detailed mobile signal conditions to analyze the relationship between various environmental factors (e.g. signal quality, band, handoff, geographic conditions, and mobility) and the QoS performance of remote collaboration in a real-world 5G environment. This study elucidated the correlation between the WebRTC performance and various environmental factors as well as the performance improvement potential by leveraging the communication technologies of multiple mobile carriers. The collected data has been made publicly available to foster research on QoS and 5G.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}