NTT DOCOMO, INC. announced today that it will initiate the commercial deployment of New Radio-Dual Connectivity (NR-DC) across three frequency bands---Sub-6 (3.7GHz and 4.5GHz bands) and millimeter-wave (28GHz band)---for high-speed transmissions connecting two 5G base stations and simultaneously transmitting/receiving across multiple frequencies supported by these stations.
From August 1, the technology will offer Japan's fastest download speeds, up to 6.6Gbps, *1 using 5G Standalone (SA) architecture. These features will initially be available in specific zones within the 5G SA coverage areas in Tokyo and Kanagawa Prefecture, *2 with plans for a gradual expansion.
Standalone (SA) mode is an optional 5G service for certain smartphones and other mobile devices under a 5G service contract. Utilization requires a 5G SA subscription, a compatible device, and a compatible SIM card. Services must be used within a 5G SA coverage area.
In December 2021, DOCOMO began offering 5G SA services, and from August 2022 combines one of two Sub-6 frequencies with the millimeter-wave band to deliver maximum download speeds of 4.9Gbps and upload speeds of 1.1Gbps. With this latest development, both Sub-6 frequencies will be combined with the millimeter-wave band for even faster transmission speeds.
