Rakuten Mobile verifies data transfer on 5G standalone network

Rakuten Mobile, Inc. today announced that it has successfully verified data transfer on a 5G Standalone (SA) mobile network with the collaboration of Tokyo Institute of Technology (Tokyo Tech) on July 4, 2021, at Tokyo Tech’s Ookayama Campus.

In 5G SA networks, 5G technology is used throughout the network, from the radio access network (RAN) to the core network. 5G SA is expected to enable operators to leverage the high capacity and high speed, low latency and massive multi-connectivity of 5G. In addition, advanced network control allows for end-to-end network slicing which will enable operators to provide services that are optimized for a wide variety of network uses.

Data transmission was carried out using a 5G SA-compatible device on the 5G network at the campus, verifying the stable operation of 5G SA. In line with its original plans, Rakuten Mobile has already begun deploying 5G SA functions on part of its commercial 5G network on June 24, 2021. Rakuten Mobile will leverage the results of the verification to improve the quality of its 5G SA network and in preparations for the full launch of commercial services.

Rakuten Mobile plans to conduct further trials of other 5G SA functions, including network slicing and edge computing. Rakuten Mobile is also collaborating with Tokyo Tech on other trials utilizing 5G networks and the two organizations are developing technologies for applications of 5G to benefit society.

Rakuten Mobile’s 5G SA network runs on the Rakuten Communications Platform (RCP). Using containers and microservices, all functions from the RAN to the core network run as cloud-native network functions (CNF).

Overview of the cloud native 5G SA architecture used

• In the 5G RAN, the virtualized distributed unit (vDU) is connected to the virtualized centralized unit (vCU) via IP transport. These functions are already containerized in 5G NSA and are running as CNFs. The RAN is compliant with Open RAN standards, offering a high degree of security and transparency.
• For the 5G core network, a newly containerized 5G core network (5GC) designed based on microservices architecture has been deployed. Running the 5GC as a CNF allows for faster and more cost-efficient improvement of network functions.
• Rakuten Mobile’s cloud technology utilizes general-purpose technologies such as COTS (commercial off-the-shelf) hardware and Kubernetes, but by using advanced automatic network controls developed by Rakuten Mobile, resources can be assigned granularly to meet the requirements and characteristics of each software component. This makes it possible to meet the high-performance requirements for telecommunications. These solutions form RCP and are used in other Rakuten Mobile systems, not just the 5G core network and RAN.