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Typical application of 25G color Optical Module in 5G Network
Time: 2020-03-29
1. Typical Architecture of 5G Networks
In a 5G network, the access network consists of three functional entities:
• CU (Centralized Unit): The non-real-time part of the original BBU (Baseband Unit) is split and defined as the CU, which is responsible for processing non-real-time protocols and services.
• DU (Distributed Unit): The remaining functions of the original BBU are redefined as the DU, which is responsible for processing physical layer protocols and real-time services.
• AAU (Active Antenna Unit): Some physical layer processing functions of the original BBU are integrated with the original RRU (Remote Radio Unit) and passive antenna to form the AAU.
According to 5G standards, during deployment, CUs, DUs, and AAUs can be deployed in discrete or co-located modes, considering factors such as service transmission requirements, construction cost investment, and maintenance difficulty. This results in various network deployment forms in practical applications. The following figure shows a typical 5G network architecture, where DUs are deployed in a centralized manner and CUs are centrally placed at a higher level:
Figure 1: Typical 5G Network Architecture Diagram
2. Application of 25G Colored Optical Modules in 5G Pre-Transmission
In 5G pre-transmission applications, passive WDM (Wavelength Division Multiplexing) is one of the most common connection solutions. Colored optical modules are installed on AAUs and DUs, and the WDM function is implemented by passive equipment, enabling a single optical fiber to provide connections from multiple AAUs to DUs. Optical signals with different central wavelengths transmitted in the same fiber do not interfere with each other, so colored optical modules realize the synthesis and transmission of multi-wavelength optical signals, greatly reducing link costs.
Figure 2: Passive WDM Connection in 5G Pre-Transmission Applications
The number of colored optical modules required in the pre-transmission application of a 5G base station depends on the design characteristics of each base station (see Figure 3 for transmission distance illustration):
Figure 3: Transmission Distance Illustration
• Ordinary 5G base stations: Applicable to most daily life and work scenarios. A base station has three sectors, each equipped with one colored optical module. Bidirectional transceivers are required for the three sectors, totaling six colored optical modules.
• 5G high-bandwidth base stations: Applicable to scenarios such as CBD business districts that need to cover more people. The design scale is twice that of ordinary base stations, usually requiring 12 colored optical modules.
• Ordinary BTS (Base Transceiver Station) with 4G/5G hybrid transmission: Six 10G colored optical modules are required for 4G services, and six 25G colored optical modules for 5G services, totaling 12 colored optical modules.
Moduletek can provide customers with 25G single-rate or 10G/25G dual-rate optical modules with stable performance, covering the full 6-wavelength range of 1270-1370nm, which are suitable for 5G pre-transmission services. Welcome to place your orders!
If you have any questions about the above content, please contact us via email: sales@moduletek.com
