5G optical signal forward transmission architecture based on wave combination transmission

Abstract

The invention relates to a 5G optical signal forward transmission architecture based on wave combination transmission. The forward transmission framework comprises a base station outdoor part and a base station indoor part. The outdoor part of the base station comprises a holding pole, three active antenna units, namely an AAU, an outdoor double-path three-way optical splitter, three antenna branch optical cables and a remote optical cable. The indoor part comprises an indoor double-path three-way optical splitter, three indoor branch optical cables and a baseband processing unit, wherein thethree active antenna units and the outdoor double-path three-way optical splitter are all fixed on the holding pole, and the three active antenna units and the outdoor double-path three-way optical splitter are respectively connected through the three antenna branch optical cables; and the baseband processing unit and the indoor double-path three-way optical splitter are respectively connected bythree indoor branch optical cables. According to the technical scheme, the remote optical cable only adopts the two-core optical fiber, and compared with a traditional framework adopting six-core optical fibers, the use amount of the optical fibers is saved by 2 / 3, the optical fibers are saved, and the crowded pressure of urban communication pipelines is relieved.

Description

technical field [0001] The invention relates to a framework, in particular to a 5G optical signal fronthaul framework based on multiplex transmission, and belongs to the technical field of mobile communication. Background technique [0002] In the network architecture of 3G and 4G mobile communications, the radio remote technology is widely used, that is, the baseband processing unit (BBU) of the base station equipment is placed separately from the radio frequency processing unit (RRU) and the antenna, and the BBU is placed in the indoor computer room, and the RRU and the antenna are placed separately. Installed on an outdoor iron tower (or iron pole), each antenna is equipped with a RRU, the RRU is connected to the antenna with a coaxial RF cable, and the BBU is connected to the RRU with an optical cable. Since the base station generally has three antennas and three RRUs, each RRU of 3G and 4G now has two optical fibers connected to the BBU, and an outdoor base station requ...

AI Technical Summary

Problems solved by technology

Since the base station generally has three antennas and three RRUs, each RRU of 3G and 4G now has two optical fibers connected to the BBU, and an outdoor base station requires six optical fibers for the connection between the RRU and the BBU, which consumes a lot of optical fiber resources.

However, 5G mobile communication uses higher wireless frequencies than 3G and 4G, and the coverage radius of wireless signals is smaller. That is, more 5G base stations need to be built to cover an area of ​​the same size. Consuming more optical fiber resources will put enormous pressure on resources such as optical fiber cables and urban communication pipes. Therefore, the 5G optical signal fronthaul architecture urgently needs a new solution to solve the above technical problems

Images