VOL.24 NO.3

5G commercial services have been expanding in many countries around the world, and in Japan, the 5G network has been growing since the launch of commercial services in March 2020 in the form of expanded coverage, use of the millimeter-wave band, provision of standalone systems, ... Read more

In 3GPP Release 15, the 5G core network architecture was designed with a service-based architecture across network functions and interfaces, to achieve modularity, reusability, and self-containment of ... Read more

The 3GPP CT Group defines protocols that satisfy requirements for services and architectures defined mainly by the SA Group. The CT Group also specifies some functional enhancements when updates or changes ... Read more

Following the Rel-15 specifications at 3GPP for new radio access technology called NR toward 5G, Rel-16 specified enhanced technology from Rel-15 in June 2020. Then, as further enhancements to Rel-15/Rel-16 specifications, 3GPP began Rel-17 specifications in December 2019 ... Read more

The use of 5G technology is being envisioned for various industrial fields beyond mobile communications, such as smart factories. 3GPP Rel-17 has added specifications targeting a much broader range of ... Read more

In March 2020, NTT DOCOMO began 5G services using the 3GPP Release 15 standard. 5G communication services will proliferate from here on, and further increases in wireless network throughput and capacity will be demanded. Toward this end, 3GPP established the Release 17 ... Read more

5GS supports deterministic communications to guarantee bounded delay, no packet collisions, and high reliability. In 3GPP Rel-16, 5GS is integrated with IEEE 802.1Q bridged networks to support Ethernet-based ... Read more