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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 Yoshikatsu Okazaki

Vice President Yoshikatsu Okazaki

Based on the NTT R&D vision of "R&D for Smart World," NTT Network Technology Laboratories is actively engaged in the research and development of network architecture supporting the digital society in addition to innovative network technologies, communications traffic and quality technologies, environmental and energy technologies, and electromagnetic compatibility (EMC) testing and anti-interference measures.

Recent years have seen a rapid jump in the demand for information and communications technology (ICT) as digitization accelerates in a wide variety of industries. To meet this demand, the information and communications network of the future must be faster, more efficient, and more reliable than ever before. The need is also growing for a network infrastructure that can facilitate the creation of new value by making maximum use of novel technologies such as the Internet of Things (IoT) and artificial intelligence (AI).

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

Specifically, we will:
(1) Plan and promote an overall strategy for developing the future network and promoting global collaboration throughout the entire NTT Group
(2) Research and develop network architecture, transport and network-control technologies, and edge infrastructure technologies supporting NTT's Cognitive Foundation
(3) Formulate innovate concepts and theories and create new value centered about communications traffic/quality infrastructure technologies to provide customer-friendly services
(4) Developing and promoting technologies and policies for assessing environmental impact, controlling electromagnetic compatibility and optimizing energy flow

At Network Technology Laboratories, we are committed to applying the diverse expertise of our researchers to a wide range of activities, from the formulation of research strategies to basic research and development.


  • · Cognitive Foundation Network Project
  • · Communication Traffic & Service Quality Project
  • · Environmental Technology and Management Project

Main Research Areas

(1) Future network architecture

With the aim of making NTT's Innovative Optical and Wireless Network (IOWN) concept a reality, we plan to formulate an overall network strategy and promote collaboration with various laboratoriesand operators of NTT group. We will devote our efforts to designing the architecture needed for this network, creating new network value, researching and developing elemental technologiessupporting the above, promoting collaboration with outside players, and engaging in standardization activities.

(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.

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