E-band microwave enters the 5G era
According to statistics, about 40% of the global macro base stations use microwave backhaul, mainly using traditional microwave technology (6-42GHz frequency band), and the average return transmission capacity is between 50Mbps and 500Mbps, which cannot meet the base station backhaul capacity requirements of the 5G era. .
If 40% of the global macro base stations are retrofitted with fiber optic backhaul, the cost is unimaginable. Therefore, the 5G era requires microwave communication with higher transmission capacity.
To this end, E-band microwaves are on the stage of history.
E-Band microwave refers to the microwave frequency band with the frequency around 80 GHz. The actual allocated frequency band is symmetrical two segments of 71-76 GHz and 81-86 GHz, and the total available bandwidth is up to 10 GHz.
The traditional microwave channel bandwidth ranges from 3.5 MHz to 112 MHz, and the E-band channel bandwidth can be as high as 1000 MHz to 2000 MHz. After adopting high-order modulation, multi-band aggregation and MIMO technologies, it can meet the 10-20 Gbps 5G era base station backhaul requirements.
Breaking through 40Gbps for the first time
The 10-20Gbps microwave backhaul capacity can meet the early 5G deployment and some rural base stations, but with the 5G advancement, traffic demand continues to rise, the industry calls for higher microwave backhaul capacity.
At the end of 2018, Ericsson and Deutsche Telekom achieved a breakthrough of 40Gbps wireless backhaul rate on the channel bandwidth of 2000MHz based on the commercial device MINI-LINK 6352, which is four times faster than the existing system.
Milestone Breakthrough 100 Gbps
The 40 Gbps microwave backhaul rate is still not enough. For the future, the 5G peak rate will reach 10-20 Gbps, and the base station's backhaul capacity will also increase. The traffic demand will never end. The industry calls for higher microwave backhaul capacity.
Today, the microwave backhaul capacity has once again achieved a breakthrough - 100Gbps.
Telecom official website information, this time still uses the MINI-LINK 6352 device, but introduced 8x8 line-of-sight MIMO, cross-polarization interference cancellation and other technologies to achieve simultaneous transmission of 8 channels of data stream on the 2.5GHz channel bandwidth, thus achieving 100Gbps transmission rate breakthrough.
During the mid-April trial period, the transmission rate measurement was always higher than 100 Gbps, the transmission reliability was always higher than 99.995%, and the peak rate was up to 140 Gbps.
The 5G era requires more advanced backhaul solutions to support high data throughput and enhance the customer experience. The milestone of this test confirms the feasibility of microwave backhaul to support 5G high-capacity, high-performance transmission.
In addition, this also means that the future 5G fiber prequel will usher in a new disruptor---100Gbps wireless prequel.
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