The construction of the 5G network in the communication system can potentially change future life and is one of the most cutting-edge engineering fields today. The 5G base station is the core equipment of the 5G network, and the performance of the base station directly affects the deployment of the 5G network.
The 5G baseband unit is responsible for NR baseband protocol processing, including the entire user plane (UP) and control plane (CP) protocol processing functions, and provides the backhaul interface (NG interface) with the core network and the interconnection interface between base stations (Xn interface ).
A 5G Base Station is known as a gNode B (next 'generation' Node B). This is in contrast to a 4G Base Station which is known as an eNode B ('evolved' Node B), and a 3G Base Station which is known as a Node B. Figure 21 illustrates two Standalone (SA) Base Station architectures, known as 'option 2' and 'option 5'.
2. Control Unit (CU) The Central Unit (CU) efficiently orchestrates network resources and manages base stations, playing a critical role in enhancing 5G RAN performance and adaptability. One of the key functions of the CU is to establish and release connections between user equipment and the network.
The optimization configuration method for the 5G base station energy storage proposed in this article, that considered the sleep mechanism, has certain engineering application prospects and practical value; however, the factors considered are not comprehensive enough.
Therefore, base station sleep modes are introduced to reduce the energy consumption of mobile networks by deactivating unnecessary radio resources during periods of low data traffic. However, the energy reduction that can be obtained by sleep modes comes at a performance cost.
In this article, we assumed that the 5G base station adopted the mode of combining grid power supply with energy storage power supply.
The introduction of advanced sleep modes (ASM) is one of the main features of 5G networks that enables energy reduction at the base station (BS) level. While more base stations are deployed to cope with increasing data rates, not all base stations are needed at all times.
2027 master plan – a second 'Set Sail' 5G expansion plan aims for 85% 5G penetration and 75% of network traffic on 5G. The total number of 5G base stations in China reached 4.486 million as of the end of May (2025), according to data released by the country's Ministry of Industry and Information Technology (MIIT).
Mobile operators in China are ramping up 5G and 5G-A rollouts, with the former now at 4.5 million cell sites and the latter in 300 cities; a new 2027 roadmap will see 75% of mobile data in the country on 5G networks. 5G on 5M sites – China has over 4.486 million 5G sites; 5G now comprises more than 35% of total mobile base stations.
China Mobile, the world's largest mobile carrier in terms of subscribers, had previously outlined plans to deploy 340,000 additional 5G base stations in 2025. With these new 5G deployments, China Mobile's total 5G base stations will reach nearly 2.8 million by the end of 2025.
Mobile operators in China are ramping up 5G and 5G-A rollouts, with the former now at 4.5 million cell sites and the latter in 300 cities.
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