Wireless fronthaul system for digital optical transmission based on multi-core optical fiber

Abstract

The invention provides a wireless forward transmission system of digital optical transmission based on a multi-core optical fiber. The system comprises: a BBU pool, a feeder type optical fiber, a coupler unit of a second multi-core optical fiber, distributed optical fibers and L radio remote units, namely L RRU units, wherein the BBU pool is connected to the coupler unit of the second multi-core optical fiber through the feeder type optical fiber, an output end of the coupler unit of the second multi-core optical fiber is connected to the L RRU units through the distributed optical fibers, and the value of L mainly depends on the number of wireless user data accessed by the system. The wireless forward transmission system adopts the space division multiplexing technology based on the multi-core optical fiber to improve the system capacity on the space dimension, on one hand, the space division multiplexing is added on the existing wavelength-division multiplexing technology; and on the other hand, analog sub-band interference problem caused by the multiplexing of multiple subcarriers during massive data transmission can be well overcome, and the online wavelength resources are effectively scheduled by a wavelength router to reduce the power consumption of the system to a certain extent.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a wireless fronthaul system for digital optical transmission based on multi-core optical fiber. Background technique [0002] With the rapid development of communication technology, the continuous evolution of technical standards, and the emergence of the fourth generation mobile communication technology (4G), its data service transmission rate can reach hundreds of megabits or even gigabits per second, which can meet certain requirements to a certain extent. Broadband mobile communication application requirements. However, with the continuous growth of smart terminals, applications, and new mobile service demands, the demand for wireless transmission rate is increasing exponentially, and the transmission rate of wireless communication will still be difficult to meet the application requirements of future mobile communications. In order to cope with the ar...

AI Technical Summary

Problems solved by technology

In the actual network deployment, due to the continuous upgrading of the access network, the wavelength resources suitable for the communication band have shifted from the C-band to the L and O-band, and the use of increasing wavelength resources to expand capacity will be due to the deployment of optoelectronic devices. increase in system cost due to the increase

Therefore, the method of expanding capacity based on increasing wavelength resources cannot better meet the development of future 5G access network systems to a certain extent.

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