Open RAN and AI are reshaping mobile networks for smarter VoIP performance, better interoperability, and faster service innovation. As operators adopt multi-vendor RAN Intelligent Controllers, testing, security, and trusted data become critical to reliable voice over IP, network slicing, massive MIMO optimization, and autonomous telecom operations at scale worldwide today
Japan’s top mobile operators are exploring shared 5G mmWave infrastructure to cut deployment costs and improve dense urban coverage The KDDI NTT Docomo SoftBank and Rakuten Mobile study could boost high-speed mobile VoIP low-latency calling and next-generation business communications across stadiums stations and smart city hotspots in Japan more efficiently
Ericsson strengthens NTT DOCOMO’s 5G strategy with advanced RAN Compute, boosting capacity, energy efficiency, and AI-ready automation for next-generation mobile and VoIP services in Japan. The platform supports 4G, 5G, and 5G Advanced, helping operators manage rising data, cloud communications, video traffic, and connected devices while reducing network operating costs
Japan is leading the Asia-Pacific region in Open RAN (O-RAN) technology, showcasing its advanced role in integrating virtualized RAN (vRAN) solutions. Rakuten Mobile operates the world’s largest O-RAN network, influencing both domestic and global markets, with telecom giants like NTT Docomo, KDDI, and SoftBank gradually adopting these cutting-edge solutions.
NTT Docomo recently faced a DDoS attack, disrupting systems for nearly 12 hours. As such cyberattacks rise in the telecom sector, robust security measures are vital.
Japanese telecom giant NTT Docomo, alongside global partners, has demonstrated AI-powered enhancements for 6G, achieving an 18% boost in communication efficiency. This breakthrough uses AI to optimize modulation and channel estimation, enabling faster, smarter networks.
NTT Docomo’s 6G Harmonized Intelligence Project envisions an AI-driven network revolutionizing telecommunications beyond 5G. By focusing on sustainability, efficiency, and enhanced user experience, this initiative aims to unlock new paradigms for AI and robots, ensuring seamless communication.
Samsung and NTT Docomo are combining forces to propel AI research and innovation within the telecommunications sector, setting the stage for 6G technology. This strategic partnership aims to elevate network quality and service, ensuring seamless VoIP communication even in challenging signal areas.
NTT DoCoMo has successfully tested a hybrid quantum-computing-based network optimization solution from D-Wave Quantum, enhancing network performance and reducing paging signal congestion by 15% during peak times. This quantum breakthrough optimizes base station tracking, predicting device movements, and efficiently reconnecting devices. The hybrid solver completed tasks in 40 seconds compared to 27 hours for traditional methods.
NTT Docomo is set to launch New Radio dual connectivity technology, offering download speeds up to 6.6 Gbps using 5G Standalone architecture. Utilizing sub-6GHz bands and mmWave, this VoIP-enhancing tech will debut in Tokyo and Kanagawa starting August 1.

