The communication triangular tower is composed of antenna, computer room, base station, feeder, and supporting equipment. The antenna is on the top of the triangular tower, and there is a computer room under the tower. The computer room mainly houses the base station, which is a device for transmitting wireless signals.The base station is logically divided into two parts, the BBU and the RRU. The RRU is responsible for sending and receiving signals, and the BBU is responsible for signal processing.The feeder is used to connect the antenna and the base station, and the supporting equipment is mainly a power supply and an air conditioner.

In distributed sites, the BBU and RRU of the base station work separately. The RRU is hung on the tower, and the BBU is placed in the computer room below the tower. layer information. CWDM XFP

The transmission carriers connecting the BBU and RRU devices are optical modules and optical fibers. In 2/3/4G networks, it is generally sufficient to use 10Gbps optical modules for CPRI interfaces. In 5G networks, CPRI is also upgraded to eCPRI. Currently, 5G The fronthaul of the bearer network mainly uses 25Gbps optical modules.

Next, ETU-Link will introduce the types of optical modules used by 10G SFP+ and 25G SFP28 optical modules to connect BBU and RRU equipment.

1. 10G SFP+ CPRI SR 300M (industrial grade)

ETU-Link's product model is ES85X-3LID03, which uses 850nm VCSEL laser and PIN photodetector, the operating temperature range is -40°C-85°C, and complies with SFP28 MSA, IEEE 802.3 25GBASE-SR Ethernet and CPRI standards, through multi-mode Optical fiber transmission distance up to 300m (OM3).

2. 25G SFP28 CPRI/eCPRI SR 100M (industrial grade)

optical modules ETU-Link's product model is ES2852X-3LID01, which uses 850nm VCSEL laser and PIN photodetector, and its operating temperature range is -40°C-85°C. It complies with SFP28 MSA, IEEE 802.3 25GBASE-SR Ethernet and CPRI/eCPRI standards. Multimode fiber transmission distance up to 70m (OM3) or 100m (OM4).

The arrival of 5G has brought tremendous changes to our lives. The most obvious thing is that the network speed has become faster, and mobile phones have changed from 4G to 5G mobile phones. Development of technology, VR.

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