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News Release

March 27, 2026
NTT EAST, Inc.

Release of the Local 5G(Private 5G)Optimization Project "Joint Demonstration Report Version 2.0" with 26 Participating Companies —Japan's First Demonstration Results of Multi-Vendor Testing Using RIC for the AI Era —

Tokyo, March 2026 — NTT EAST, Inc.(President & CEO: Naoki Shibutani, hereinafter referred to as "NTT EAST")launched the "Private 5G Optimization Project"(hereinafter referred to as the Project)on November 6, 2023*¹, with the aim of accelerating the expansion and adoption of Private 5G through further cost reduction and enhanced convenience. Since then, NTT EAST has been working on joint demonstration activities together with 26 participating companies.

In FY2024, the Project published the "Joint Demonstration Report Version 1.0"*2, which presented the results of 265 interconnection test scenarios between equipment from different vendors, as well as the outcomes of security enhancement testing, thereby contributing to the acceleration of the societal deployment of Private 5G.

As a new achievement of the Project, NTT EAST has now successfully conducted multi-vendor connectivity testing using the RAN Intelligent Controller(RIC*3)specified by the O-RAN ALLIANCE*4, marking the first such publicly disclosed case in Japan for Private 5G*5.

Based on these achievements, NTT EAST, together with the participating companies, hereby publishes the "Joint Demonstration Report Version 2.0"*6 under the joint authorship of the participating companies, summarizing the results and insights obtained through the Project.

  • *1Press Release: "Launch of the Optimization Project to Accelerate the Societal Deployment of Private 5G
    — Agreement Reached with 18 Domestic and Overseas Telecommunications Equipment Vendors —
    https://www.ntt-east.co.jp/release/detail/20231106_01.html
  • *2Press Release: Release of the Local 5G(Private 5G)Optimization Project "Joint Demonstration Report Version 1.0"
    https://www.ntt-east.co.jp/en/release/detail/20250225_01.html
  • *3RIC(RAN Intelligent Controller)is a controller specified by the O-RAN ALLIANCE that enables advanced control of radio access networks. By analyzing information collected from base stations, it is capable of autonomously and automatically controlling communication quality.
  • *4The O-RAN(Open Radio Access Network)ALLIANCE is an industry organization that develops standard specifications with the aim of promoting openness and intelligence in next-generation radio access networks, including 5G.
  • *5Based on an investigation of publicly available information in Japan conducted by NTT East, this was confirmed to be the first publicly disclosed example of validating the connection and control of multi-vendor 5G equipment via a RIC in a Private 5G test environment(as of March 2026).
  • *6Appendix 1: Joint Demonstration Report Version 2.0" is available at the links below:
    Japanese version: https://www.ntt-east.co.jp/release/detail/pdf/20260327_01_01.pdfPDF[4.95MB]
    English version:https://www.ntt-east.co.jp/en/release/detail/pdf/20260327_01_01.pdfPDF[4.76MB]

1. Release of the "Joint Demonstration Report Version 2.0"

This report presents the results of connectivity testing of Private 5G equipment in a multi-vendor configuration utilizing RIC, along with the final report on interconnection testing between Private 5G devices continued from Version 1.0.

By leveraging these findings, it is expected that integration costs in multi-vendor configurations can be reduced, flexible equipment selection tailored to specific use cases will be promoted, and energy efficiency and more effective spectrum utilization will be accelerated through autonomous control of base stations(RAN)using RIC.

(1)Interconnection Testing Between Private 5G Devices

Participating companies brought their respective 5G core systems, RAN equipment, and 5G user devices to NTTe-city Labo*7, where interconnection testing was conducted across a total of 335 combinations(an increase of 70 compared to the previous year).

As a result of the testing, approximately 98.5% of the combinations achieved successful connections, and this report discloses a list of the successful combinations.

For combinations that did not result in successful connections, root-cause analyses were conducted. Based on the insights obtained through this process, technical considerations for interconnection have been identified and documented.

Furthermore, for combinations with successful connections, performance evaluation tests-including throughput measurements and latency measurements during 4K video transmission-were conducted, and the results are included in the report.

  • *7NTTe-city Labo is a facility where visitors can experience solutions developed by the NTT East Group to address regional challenges.

(2)RIC Testing in a Private 5G Multi-Vendor Configuration

Unlike carrier 5G, Private 5G can be adapted to a wide variety of use cases through parameter tuning; however, the operational burden associated with parameter adjustment remains a challenge. For this reason, there is strong demand for mechanisms that can autonomously and automatically optimize network quality.

In Joint Demonstration Report Version 2.0, multi-vendor connectivity tests were conducted using RIC under themes such as "RAN transmit power optimization" and "radio interference mitigation," and their effectiveness was evaluated.

In addition, NTT East conducted multi-vendor connectivity tests in which RIC autonomously assessed Private 5G traffic usage and controlled RAN operation to reduce power consumption, achieving approximately 65% power reduction under certain conditions.

Figure 1. Overview of RAN Power Consumption Reduction

As AI-based autonomous control is increasingly introduced to enhance next-generation networks, RIC is considered to be a core technology enabling such evolution. Going forward, NTT East will continue to advance autonomous optimization technologies and contribute to the practical deployment and widespread adoption of self-optimizing networks.

2. Future Plan of the Project

With the publication of the "Joint Demonstration Report Version 2.0," the Project-which has focused on interoperability among Private 5G equipment-will be concluded.

Going forward, NTT East will continue to leverage the relationships established with participating companies and the insights gained through the Project, and will collaborate with participating companies to accelerate the societal deployment of Private 5G through their respective initiatives.

In the future, demand for wireless communications across society is expected to further expand due to the proliferation of autonomous driving, AI-enabled services, and a wide variety of IoT devices. In such environments, the ability to ensure reliable connectivity even when devices and equipment from different vendors coexist will become increasingly important.

NTT East believes that the multi-vendor interoperability insights and the achievements related to autonomous wireless optimization using RIC obtained through this Project will continue to deliver value in these future use cases.

Looking ahead, NTT East will further promote co-creation in new technological domains, including next-generation communications such as 6G and network architectures combining multiple radio access technologies, and will continue contributing to sustainable value creation by accelerating industrial digital transformation(DX)and addressing social challenges.

3. Contact Information for Customer Inquiries Regarding This Matter

Network Business Headquarters, Strategic Network Management Department, NTT EAST, Inc.
EMAIL: L5G-OptimizationPJ-gm@east.ntt.co.jp

Information is current as of the date of issue of the individual press release.
Please be advised that information may be outdated after that point.

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