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Tag: ntt docomo

  • NTT DOCOMO and Nokia Launch Multi-Vendor O-RAN Base Station Platform

    NTT DOCOMO and Nokia Launch Multi-Vendor O-RAN Base Station Platform

    NTT DOCOMO began commercial operations on September 9 for a multi-vendor base station platform built on open radio access network standards in Japan.

    The deployment allows DOCOMO to combine Nokia base station equipment with O-RAN-compliant radio units supplied by different vendors across LTE and 5G networks.

    DOCOMO deployed Nokia AirScale equipment incorporating Levante data-processing and Ponente control-processing technologies to handle more radio units while reducing power consumption.

    Hardware Details and Power Savings

    This updated equipment handles more radio units per site than DOCOMO’s previous Nokia gear while drawing less power. Lower electricity demand directly reduces operating costs across dense urban grids where base station density is highest.

    Under open interface specifications, engineers can pair the central processing base with high-power transmitters for suburban coverage or compact transceivers for city spaces. DOCOMO uses this modular mix to adjust capacity without replacing full base station stacks.

    Multi-Vendor Flexibility in the Field

    Japanese mobile operators have adopted open architecture faster than carriers in North America or Europe. By ending single-supplier reliance on base stations and antennas, DOCOMO forces vendors to compete on unit price, form factor, and power efficiency.

    Field maintenance and troubleshooting carry the main technical risks. Coordinating software upgrades and diagnosing network faults across hardware from different vendors creates operational friction that proprietary setups avoid.

    High-Density Event Deployments

    On September 12, the carrier brought the multi-vendor setup into field service at the 59th Joso Kinugawa Fireworks Festival. DOCOMO mounted the platform inside a mobile cellular vehicle, pairing it with Nokia Dual Boost Massive MIMO hardware to handle surges in data uploads and voice traffic.

    Engineers plan to expand the base station architecture nationwide. Initial site conversions will focus on metropolitan sectors, stadiums, exhibition centers, and outdoor entertainment venues where mobile traffic spikes.

    Roadmap to Autonomous Networks

    Work on the rollout stems from a technical memorandum of understanding DOCOMO and Nokia signed on August 12. That agreement established joint trials for virtualized radio access networks, cloud infrastructure, and AI-directed network management systems.

    Joint testing now focuses on running Self-Organizing Networks and RAN Intelligent Controller automation tools across mixed-vendor hardware fleets as DOCOMO prepares its transmission grid for 5G-Advanced and early 6G standards.

  • Japan Four Big Telcos Form 5G Millimeter-Wave Sharing Pact

    Japan Four Big Telcos Form 5G Millimeter-Wave Sharing Pact

    Japan’s four nationwide mobile operators signed an agreement on September 21 to jointly study sharing 28GHz millimeter-wave 5G base stations and network architectures.

    The pact brings together KDDI, NTT Docomo, SoftBank and Rakuten Mobile. Together, their networks serve more than 200 million cellular subscriptions.

    Sharing high-band physical infrastructure

    Signals at 28GHz deliver ultra-high speeds and heavy throughput. However, the radio waves travel short distances and cannot penetrate concrete walls, glass or foliage. Covering a single commercial district requires hundreds of small cells and repeaters. That multiplies site acquisition costs and power bills for each carrier.

    Under the memorandum of understanding, the four operators will examine technical frameworks to share base station equipment, repeaters and related transmission assets. Each carrier will continue independent commercial rollouts. A joint working group will test how traffic from rival subscriber bases can run across shared physical nodes without degrading data security or individual network performance.

    The cost math behind 28GHz networks

    High-frequency spectrum rollouts have stalled worldwide because capital expenditure per square kilometer outpaces consumer revenue gains. Worldwide mmWave 5G spending is projected to climb from 3.84 billion dollars in 2025 to 4.42 billion dollars in 2026. Even so, individual operators face severe balance-sheet pressure when building proprietary high-band grids.

    By sharing cell sites and repeaters in dense retail quarters, transit hubs and stadiums, Japanese operators aim to cut duplicate capital outlays. Mall operators, transport hubs and enterprise landlords also gain. A unified model eliminates the need to host four separate sets of antennas and power feeds on roofs and interior walls.

    Shifting carrier spending to shared utilities

    This alliance shifts carrier dynamics across Japan. Rather than competing purely on antenna counts, the operators are treating high-frequency physical layer equipment as a common utility. Core networks and retail pricing plans will remain distinct.

    Operational risk sits in maintenance allocation and capacity bottlenecks during localized peak events. If one carrier’s subscribers crowd a shared node during an urban festival or sporting fixture, the system must arbitrate spectrum access without triggering regulatory complaints over fair competition.

    Earlier trials and global deployment lines

    Collaborative network trials have gained ground across international markets as carriers confront sub-6GHz spectrum exhaustion. Global equipment vendors and tier-one operators launched initial commercial mmWave clusters in early 2023. Enterprise fixed wireless access deployments then expanded into industrial parks and logistics hubs through 2024 and 2025.

    Japanese carriers previously tested private 5G and standalone 28GHz cells in manufacturing facilities and isolated transit pilots. Despite those trials, commercial handset connections rarely lock onto millimeter-wave signals outside select train platforms and flagship retail venues.

    Technical evaluations under the new memorandum will run over the coming quarters. Teams will focus on multi-operator core network integration and shared repeater specifications ahead of targeted commercial joint-site deployments.

  • SoftBank Completes Japan Airborne Base Station Trial for 2027 Rollout

    SoftBank Completes Japan Airborne Base Station Trial for 2027 Rollout

    SoftBank Corp. Completed Japan’s first stratospheric mobile base trial over Kochi Prefecture. The platform transmitted voice, video and drone control signals from an altitude of 20 kilometres.

    The uncrewed, airship-like craft can hover for up to six months. It acts as an airborne cell tower when earthquakes or typhoons knock out ground networks.

    Stratospheric Flight Over Kochi

    Crews launched the High Altitude Platform Station craft from New Mexico. They ran communication tests above western Japan’s Muroto region on August 23 and August 24. Engineers confirmed stable two-way voice, video and emergency channels during the two-day window.

    Flight trials also maintained continuous control links with inspection drones. SoftBank plans to deploy those links during natural disasters to check damaged roads and assess collapsed buildings without risking ground survey crews.

    Rival Operators Test Disaster Links

    Japan’s three dominant carriers are competing to secure non-terrestrial coverage across an archipelago exposed to frequent seismic activity. SoftBank, NTT DOCOMO and KDDI Corp. Already sell direct-to-satellite messaging for smartphones. Satellite bandwidth, however, struggles to support video feeds and autonomous drone flights during emergencies.

    High-altitude stations solve that bottleneck by operating closer to Earth than low-orbit satellites. NTT DOCOMO is preparing trials in Ishikawa Prefecture’s Noto peninsula using a balloon-shaped craft. That project targets damage assessments and labor monitoring for forestry and agriculture.

    Commercial Service Targets 2027

    Demand for stratospheric networks intensified after a magnitude 7.6 earthquake struck the Noto region on January 1, 2024. The disaster cut road access and severed terrestrial fiber links across dozens of coastal communities.

    SoftBank plans to widen flight zones and extend mission durations ahead of a commercial rollout in 2027. That service will target enterprise clients and municipal governments seeking backup connectivity during regular operations.