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Kanazawa University Hospital OpenFlow Networking Kanazawa University Hospital uses NEC's Programmable Flow to build a new network infrastructure that delivers the secure performance and responsiveness required of hospital networks in today's environment of rapidly evolving medical technologies.

photo:Keisuke Nagase

Keisuke Nagase

Vice Director and
Corporate Planning Division Director/Professor

Kanazawa University Hospital

“ProgrammableFlow has moved us one step closer to total network optimization. It enables flexible and efficient operation without increasing the workload of hospital staff, while providing a much higher level of security.”
photo:Shinsuke Yamaoka

Shinsuke Yamaoka

Corporate Planning Division
Research Associate Professor

Kanazawa University Hospital

“We can now run a network that doesn’t depend on a physical configuration. Medical equipment can also be used with flexibility regardless of department. We believe that this will lead to a higher quality of care, which is our ultimate goal as a hospital.”



Kanazawa University Hospital had a network where hospital staffs were struggling to keep pace with the rapid evolution in clinical medicine and medical technologies occurring today. The network had been expanded according to the individual needs of each department or laboratory and was difficult to manage. The decision was made to revolutionize the hospital’s network infrastructure by deploying NEC’s UNIVERGE ProgrammableFlow series, a groundbreaking network solution based on OpenFlow technology. ProgrammableFlow delivered a flattened, open networking topology that simplified network management and improved performance. The hospital now hopes to use NEC’s ProgrammableFlow series to realize universal connectivity to facilitate the movement and use of medical equipment.


“Individual optimizations had led to a complex network structure whose physical wiring and overall configuration were difficult to grasp,” explained Shinsuke Yamaoka, Research Associate Professor in the Corporate Planning Division, Kanazawa University Hospital. “Also, because the network was operated by hospital staff, human errors could occur easily. Sometimes just plugging a cable into an available port would create a loop.”
Technologies evolve rapidly in the medical field, and doctors were often trying out new equipment. Connecting these equipment to the network involved changing settings and verifying connections, and sometimes even rewiring, putting a considerable strain on the hospital’s budget. Kanazawa University Hospital’s Vice Director and Corporate Planning Division Director/Professor Keisuke Nagase elaborated. “A network that requires setting changes and rewiring every time a new piece of equipment is connected cannot be called stable. We needed a flexible, safe, and secure network infrastructure that would allow us to respond immediately to the rapid changes that occur in our field, provide independent security for each department, and be easy to manage.”


To solve its network problems and create a stable network infrastructure, Kanazawa University Hospital chose to deploy NEC’s UNIVERGE ProgrammableFlow series.
The ProgrammableFlow series is a ground-breaking network solution developed by NEC based on OpenFlow network control technology. With ProgrammableFlow, the entire network can be managed like a single virtual switch, facilitating the creation of an independent virtual network. This kind of software-defined network (SDN)—a network that is constructed logically via software—enables flexible architectural modifications and additions as well as efficient operations management. Nagase explained why the hospital selected NEC’s ProgrammableFlow series. “We wanted a network that was transparent and that could be managed in an integrated fashion, while responding flexibly to the demands of each department. We also needed to reduce the work involved in changing settings and so on whenever we moved or added a piece of equipment. We felt that ProgrammableFlow would resolve all these issues and provide us with a network that could be run and managed very efficiently.”
“What we really wanted was a network that we could control,” added Yamaoka.
“With ProgrammableFlow, we could control the flow of communication data, making network management much easier for those of us who are not IT or network professionals.”
NEC installed two ProgrammableFlow controllers and 16 switches in the hospital’s clinical research building, built to provide enhanced facilities for research and training.
“ProgrammableFlow allowed us to install devices one floor at a time and expand gradually and safely,” said Yamaoka. “And we could manage each department’s LAN without impacting our existing network.”
NEC required only one month to get the new network up and running.
“In spite of the new technology and short lead-time, we’ve had no major problems. Thanks to NEC’s excellent technology, the network is running very stably,” said Nagase.


Kanazawa University Hospital believes that NEC’s ProgrammableFlow series will deliver the following results:

1. Network transparency and integrated management
ProgrammableFlow gives visibility to both the network’s physical and logical configurations, providing a clear picture of all network statuses. This enables integrated management and reduces the operational load.

2. Virtual networks can be flexibly created for each department and controlled centrally
ProgrammableFlow realizes a network that is both flexible and secure by allowing departments to create their own virtual networks, while at the same time providing seamless and safe interdepartmental connectivity. “Each department is responsible for information such as research data that should not be able to be accessed by people from outside that department,” explained Yamaoka. “But this problem is now solved because departments can create independent virtual tenant networks (VTNs) on the ProgrammableFlow network.” ProgrammableFlow also allows devices such as firewalls to be allocated from a common pool, reducing the number of network devices required, thereby lowering network-related costs.

3. Connected devices are recognized and automatically deployed to the appropriate VTN
ProgrammableFlow will enable the realization of universal connectivity in which the appropriate policy is applied to a medical device when it is connected, regardless of which LAN port it is connected to.Yamaoka talked about the hospital’s hopes for the future. “We are seeing an increase in portable equipment that can move around with patients, so equipment is frequently being unplugged from and plugged into the network. In a conventional environment, the network settings would have to be changed each time the equipment was connected, but ProgrammableFlow technology renders this unnecessary. We believe that NEC’s next-generation network technology will provide universal connectivity and even enable devices connected to the network to be controlled remotely.”

4. Advanced routing control based on communication type
By using ProgrammableFlow, the routing required for certain types of communication can be specified in advance. “For example,” says Nagase “We can preallocate wideband routing for image data, which has become incredibly heavy as definition has increased, helping us maintain network stability.”

ProgrammableFlow will clearly resolve all the client’s networking issues, while at the same time increase the knowhow of staff on the ground and help optimize the hospital’s entire medical information system. “NEC has an incredible amount of technical expertise—we can rely on them completely,” praised Nagase. “We hope to continue our excellent relationship.”
Kanazawa University Hospital intends to continue using advanced information technologies to improve the quality of care, rationalize operations, and respond to the needs of the local community.

Programmable flow network


As one of core medical institutions, Kanazawa University Hospital is dedicated to providing the best medical care to patients with the most advanced technology and a superior team. The hospital is committed to promoting clinical research and developing excellent human resources, acting as a role model for local doctors and other healthcare professionals.

Customer profile

Kanazawa University Hospital

Type of business Healthcare
Address 〒920-8641 13-1 Takara-machi, Kanazawa, Ishikawa, Japan
Established 1862
Number of employees 1,704 (plus 73 university teaching staff)
Overview The hospital provides comprehensive medical services over 31 clinical departments, including internal medicine, surgery, pediatrics, urology, ophthalmology, otorhinolaryngology, obstetrics and gynecology, and radiology. Working together with Kanazawa University, the hospital aims to actively promote clinical research and training while fostering the next generation of healthcare professionals.

(June 28, 2012)

As one of core medical institutions, Kanazawa University Hospital is dedicated to providing the best medical care to patients with the most advanced technology and a superior team. The hospital is committed to promoting clinical research and developing excellent human resources, acting as a role model for local doctors and other healthcare professionals.