NTT DOCOMO, Inc., and NEC Corporation have collaborated on expanding multi-vendor interoperability by interconnecting a new 5G base station baseband unit (5G-CU/DU) with 5G base station remote radio units (5G-RUs) of other vendors on DOCOMO's commercial network. The 5G-CU/DU developed by NEC and Samsung Electronics is compliant with O-RAN Alliance specifications,
Expanding multi-vendor interoperability based on O-RAN open interface specifications will enable the most appropriate base stations to be used depending on deployment scenarios and taking advantage of specific vendor and equipment characteristics. This will drive the rapid and flexible development of 5G service areas.
The 5G base station baseband unit from NEC is interoperable with all existing vendors' 5G base station remote units in DOCOMO's network owing to its adoption of O-RAN open fronthaul specifications. It is also compatible with all existing 4G base stations in DOCOMO's network thanks to its adoption of O-RAN open X2 specifications.
Multi-vendor interoperability using O-RAN open fronthaul specifications was also confirmed for NEC's macro-cell 5G-RU, which provides wide area coverage, and for NEC's fronthaul multiplexer (5G-FHM), which copies and combines the fronthaul signals to and from multiple 5G-RUs to form a single area.