Loopback detection method, BBU (Base Band Unit), RRU (Radio Remote Unit) and optical access network system

Abstract

The invention discloses a loopback detection method. The loopback detection method is applied to an optical access network system comprising an RRU (Base Band Unit) and at least one RRU (Radio Remote Unit), and comprises the following steps: the BBU sends a loopback detection signal generated according to a first control strategy to the RRU on which a loopback detection is to be performed; the RRU on which a loopback detection is to be performed, after receiving the loopback detection signal, sends a loopback answering signal generated according to a second control strategy to the BBU; the BBU after receiving the loopback answering signal sends loopback test data to the RRUon which a loopback detection is to be performed; the RRU on which a loopback detection is to be performed loops the loopback test data back to the BBU; and the BBU judges whether the received loopback test data is normal. According to the loopback detection method disclosed by the invention, a loopback detection state is entered without needing a worker to manually operate the RRU at a remote terminal, and the remote terminal loopback detection can be carried out conveniently in the network connection and fault maintenance process. The invention further discloses the BBU, the RRU and the optical access network system.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a loopback detection method, a BBU, an RRU and an optical access network system. Background technique [0002] As an optical access network system, distributed base stations are widely used in mobile communication networks because of their advantages such as low cost, strong environmental adaptability, and convenient engineering construction. The core concept of the distributed base station structure is to separate the base band processing unit (BBU, Base Band Unit) of the traditional macro base station from the remote radio unit (RRU, Radio Remote Unit), and the two are connected through optical fibers. During network deployment, the baseband processing unit BBU, core network control equipment, and wireless network control equipment are concentrated in the main station of the computer room, and connected to the RRU deployed on the remote station through optical fib...

AI Technical Summary

Problems solved by technology

At present, the method of realizing the remote loopback at the RRU of the remote station is to send personnel to the remote station, and realize the signal remote loopback manually on site. This method takes a long time and has high labor costs.

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