Qualcomm, NTT DOCOMO commercialise ‘world’s first’ 5G sub-6GHz CA in Japan

8 Dec 2020

US-based Qualcomm Technologies and Japanese mobile carrier NTT DOCOMO today (8 December) announced what they claim is the ‘world’s first commercialisation of 5G sub-6GHz carrier aggregation (sub6-CA) in Japan’. The two companies say that sub6-CA is ‘effective immediately’ and will deliver multi-gigabit capability to DOCOMO’s customers, noting that the rollout of 5G carrier aggregation (CA) is considered a ‘critical capability in 5G specifications’ as DOCOMO expands its fifth-generation network.

In a joint press release, the pair confirmed: ‘Using DOCOMO’s new 5G network and select devices powered by the Qualcomm Snapdragon 865 Mobile Platform with the Snapdragon X55 5G Modem-RF System, customers can now enjoy mobile download speeds of up to 4.2Gbps – the fastest speeds available in Japan. This level of service is achieved through 5G sub-6GHz carrier aggregation, which combines a 100MHz carrier in band n78 and a 100MHz carrier in band n79 to boost 5G performance and network capacity using DOCOMO’s diverse spectrum assets.’ DOCOMO is deploying sub6-CA alongside the 5G mmWave 28GHz band service that it began operating commercially in September.

Japan, NTT DOCOMO, Qualcomm