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Service Computing Lab
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The lab studies information systems and networks from a service perspective.
AboutAbout the lab
Creating information service technologies that help solve social issues
The Service Computing Lab studies the technologies and methodologies of information systems and networks from a service perspective, and aims to demonstrate them on real-world problems.
The research is divided into three areas: next-generation network infrastructure, information systems that solve people's everyday problems, and mechanisms that support digital twins and the metaverse.
Each student takes charge of one research topic, and both undergraduates and graduate students work toward giving an academic presentation every year.
On the lab's website, the lab is also introduced under the name "Hoshikawa Lab."
Key terms
- Clock fingerprinting
- A technique that uses the temperature characteristics of a device's clock frequency, which differ from device to device, as an identifier of that device
- All-Photonics Network
- A next-generation network in which every network connection is completed in optical form
- SIM Applet
- An application that runs on a SIM card independently of the device itself
- Hot spot
- A localized temperature anomaly caused by heat released from equipment
NewsLab news
Lab information sessions held for third-year students in the College of Information Science (final session on Oct 15)
A master's student received the Young Researcher Encouragement Award at the IEICE Technical Committee on Service Computing (SC)
A doctoral student and Associate Professor Naoto Hoshikawa received the 2025 Annual Award of the SC Technical Committee
A master's student received the FY2025 Network Systems Young Researcher Encouragement Award at the IEICE Technical Committee on Network Systems (NS)
A master's student and an undergraduate student received the FY2025 Outstanding First Technical Committee Presentation Award at the IEICE NS Technical Committee
ResearchResearch themes
Aiming to create information service technologies that help solve social issues, the lab divides its research into three areas: near-future network service infrastructure, applications that solve social issues using information systems, and support systems for realizing digital twins and the metaverse. In every topic, problems are set with their application and practical use in mind.
*Illustrative imageDevice identification and time correction using clock signals
The lab studies clock fingerprinting, which extracts the temperature characteristics of a device's hardware-specific clock frequency over a network and uses them as an identifier of the device. Using the same characteristics, the lab also works on techniques to correct drift in the system time without synchronizing time with an external source.
*Illustrative imageEvaluating applications on ultra-low-latency networks
The ultra-low latency of the All-Photonics Network (APN) is difficult to observe, and its benefits have not been fully explained. Focusing on latency, the lab evaluates applications, measuring actual latency in video conferencing services and building an experimental platform to investigate conversation quality at ultra-low latency.
*Illustrative imageApplications on SIM cards
A SIM card is a small computer with high tamper resistance and low power consumption, and it can run a SIM Applet independently of the device itself. Taking advantage of this, the lab studies application systems, such as evacuation behavior logging during disasters, that keep working even when a device stops functioning or communication is lost.
*Illustrative imageThermal environments in data centers and air-conditioning optimization
In data centers and machine rooms, heat released by equipment creates hot spots, which lowers cooling efficiency and increases power consumption. By visualizing temperature distributions with multi-point temperature sensors and analyzing simulated environments in a thermostatic chamber, the lab aims to clarify how hot spots arise and to save power through optimized air conditioning.
MembersFaculty
The members of the Service Computing Lab consist of the supervising faculty and students in the doctoral program, the master's program, and the College of Information Science.As of 2026
- Associate ProfessorNaoto Hoshikawa
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Modern exchange equipment” Vivien Guéant / CC BY-SA 3.0 (cropped)
- Device identification and time correction using clock signals: “Crystal oscillator internals” Marcin Andrzejewski / CC BY-SA 3.0 (cropped)
- Evaluating applications on ultra-low-latency networks: “Fiber-optic-construction” Robotics Universe / Public domain (cropped)
- Applications on SIM cards: “SIM card sizes” Jbond2018 / CC0 (cropped)
- Thermal environments in data centers and air-conditioning optimization: “Confinamento de data center-es” CWB Metal / CC BY 4.0 (cropped)
- Related lab (Operating Systems and System Software Lab): “Bacloud.com data center 2” Fleshas / CC BY-SA 4.0 (cropped)
- Related lab (System Security Lab): “LC-P computer keyboard - IC encapsulated on printed circuit board-3464” Raimond Spekking / CC BY-SA 4.0 (cropped)
- Related lab (Interactive Programming Lab): “Basic model of HCI” Dr. Greywolf / CC BY-SA 4.0 (cropped)
- Related lab (Software Lab): “CERN Computer Center 16” SimonWaldherr / CC BY-SA 4.0 (cropped)
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