Top of Page
Content Area

Network Technology Laboratories

Network Technology Laboratories

Overview of the Laboratories

Network Technology Laboratories is responsible for formulating an R&D strategy toward an information and communications network infrastructure of the future.


Vice President Yukari Tsuji

Vice President Yukari Tsuji

At Network Technology Laboratories, we are involved in strategic planning and promotion of network architecture for achieving an information and communications network infrastructure of the future. To this end, we are researching and developing new network technologies based on innovative technologies from diverse fields such as Internet of Things (IoT), artificial intelligence (AI), and security, as well as traffic/quality management technologies, environmental assessment technologies, and electromagnetic compatibility (EMC) testing techniques and countermeasures.

The demand for Information and Communications Technology (ICT) is rapidly growing as the trend toward digitization accelerates in all sorts of industries. The information and communications network of the future must therefore be highly advanced, highly efficient, and highly secure compared with today's network. There is also a need for creating a network infrastructure that makes maximum use of IoT, AI, and other innovative technologies.

To deal with such a rapidly changing world, Network Technology Laboratories is responsible for formulating an R&D strategy toward an information and communications network infrastructure of the future.

As part of this strategy, we are:
(1) Planning and promoting an overall strategy governing the future network of the NTT Group and global collaboration
(2) Conducting studies on future network architecture and promoting the development of innovative network technologies using key technologies in IoT, AI, and security
(3) Developing groundbreaking concepts and theories and creating new network value centered about traffic/quality infrastructure technologies with the aim of providing customer-friendly services
(4) Developing and promoting technologies and policies for environmental assessment with the aim of reducing environmental load, and developing EMC testing technologies and countermeasures to solve EMC problems.

At Network Technology Laboratories, we plan to continue with a wide range of activities from the formulation of network-research strategy to base-technology research and commercial development by applying the diverse specialties of our top-class researchers.


  • · Network Strategy Project
  • · Network Architecture Innovation Project
  • · Communication Traffic & Service Quality Project
  • · Environmental Technology and Management Project

Main Research Areas

(1) Future network architecture

The future network based on the NetroSphere concept aims safe, secure, and economical network as a social infrastructure for a variety of market players in light of the situation surrounding communications industry. This enables to quickly form proportional networks that can offer required functionality, capacity, and level of redundancy in accordance to the user's needs. As a result, carrier networks will achieve enhanced flexibility and elasticity while also drastically reducing costs.

(2) Communication Traffic and Quality

Telecommunications traffic is the aggregate of information (such as data, signals etc.) which originate the actions of the customers. In order telecommunication services are provided in excellent quality, we need traffic fluently distributed through the network. Our aim is to establish all-time customers' first choice network by giving the best quality experiences. To do so, we have been challenging the following research topics: To visualize the satisfaction/dissatisfaction of the customer experience by making the index of their experience level. To clarify the mechanism how traffic changes and to control both network and customers before those changes of traffic influence the service quality.

Communication Traffic & Service Quality ProjectNEW Window

Proactive network control

Our methods enable networks to adapt flexibly to traffic variations such as service demand fluctuations or disasters, giving peace of mind to network users. Our methods normally optimize network resource availability to withstand unexpected traffic increases, and when disasters occur, our methods suppress the influence of failure to continue services. Hence, our methods provide stable services.

QoE-centric operation

NTT Network Technology Laboratories has been studying methodologies for evaluating, managing, and controlling user quality of experience (QoE) for a variety of services. These technologies will contribute to the operation of telecommunications services based on user QoE, which we call QoE-centric operation. In this operation, the information on network condition is shared with service providers and end users to help them use networks as effectively as possible.

(3) Environmental technology and management

We have been developing technologies for assessing environmental impact of our network infrastructure and ICT services on society and technologies for electromagnetic compatibility (EMC) design and testing of our network. Through our research and development, we support our environmental vision and action plans for environmental management in technical aspect and intend to fundamentally solve EMC issues for our future ICT network to be zero-emission and resilient against environmental problems.

Footer Area

Copyright © 1999 Nippon Telegraph and Telephone Corporation