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Yamaoka-Kitaguchi Lab
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A networking lab that supports the Internet from both theory and implementation.

AboutAbout the lab
Network layers 2 through 6.
The Yamaoka-Kitaguchi Lab studies control technologies for information and communication networks such as the Internet, and multimedia processing technologies for communication.
From both theory and implementation, the lab works on new communication protocols, communication quality control, network operations, and more.
There are many opportunities to present and learn from one another in the lab, including the spring lab seminar in April, the winter lab seminar in December, and textbook reading sessions (rinko) in which members read textbooks together.
Anyone who wishes to take the entrance exam must meet with Prof. Yamaoka beforehand, regardless of program and whether they are from inside or outside the university.
Key terms
- Communication protocol
- The rules for how data is sent and the procedures that computers follow when communicating with each other.
- Admission control
- A mechanism that decides, when a network is congested, which communications to accept and which to make wait or reject.
- Passive measurement
- A method of examining the state of a network by observing the data flowing through it, without altering the communication.
ResearchResearch themes
The lab studies network control technologies and multimedia processing technologies for communication, targeting information and communication networks such as the Internet, from both theory and implementation. It works on new communication protocols, securing acceptable communication delay, quality control of multimedia communication, and network state evaluation and operations.
*Illustrative imageControl for Accepting Many Calls in Emergencies
The lab studies a new admission control method that, during emergencies such as disasters, secures as many urgent voice calls as needed while still accepting more ordinary calls, such as safety confirmation calls.
*Illustrative imageFault Detection in Complex Networks
The lab systematically organizes cases of faults that occur in complex networks and builds methods to support less experienced operators, working to establish a new form of network operation.
*Illustrative imageMeasurement Methods for Wireless LAN Quality
To quantitatively evaluate wireless LAN communication quality, which varies by location, the lab proposes a method that combines active measurement, which tests network functions, with passive measurement, which observes wireless LAN frames.
MembersFaculty
The Yamaoka-Kitaguchi Lab's members consist of faculty, assistant staff, and doctoral, master's, and undergraduate students.As of 2025
- ProfessorKatsunori YamaokaPublications ↗
- Associate Professor (Academic Center for Computing and Media Studies)Kitaguchi YoshiakiPublications ↗
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: “Network cables and switch” ProjectManhattan / CC BY-SA 3.0 (cropped)
- Control for Accepting Many Calls in Emergencies: “Cell Tower Ciudad del Carmen2020” Cvmontuy / CC BY-SA 4.0 (cropped)
- Fault Detection in Complex Networks: “Wikimedia Tampa fall 2007 cabling” meta:User:Midom / CC BY 2.0 (cropped)
- Measurement Methods for Wireless LAN Quality: “Access-point-wireless” Rodrigo César / Public domain (cropped)
- Related lab (宮田研究室): “Minato City, Tokyo, Japan (Night)” David Kernan / CC BY 4.0 (cropped)
- Related lab (山田研究室): “SAR Kilauea topo interferogram” JPL / Public domain (cropped)
- Related lab (西尾研究室): “Passive Millimeter Wave Camera (PMMWC) at TRW - GPN” Northrop Grumman Space Technology - Redondo Beach (formerly TRW, Inc)/TRW photographer / Public domain (cropped)
- Related lab (松本研究室): “Optical fiber cable-01ASD” Asurnipal / CC BY-SA 4.0 (cropped)
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