Single-fiber bidirectional optical line system based on C-RAN system

Abstract

The invention discloses a single-fiber bidirectional optical line system based on a C-RAN system, and relates to the field of mobile communication; the system at least comprises a BBU preprocessing unit, an ODN unit, a plurality of station sending ends and a plurality of RRU preprocessing units, wherein the BBU preprocessing unit is in signal connection with a BBU device pool and is used for carrying out signal transmission with the BBU device pool; the ODN unit comprises a first optical comb-shaped filter, a first filter and a second filter, wherein the first optical comb-shaped filter is used for splitting the signals into odd waves and even waves and further used for integrating and transmitting the signals to the BBU preprocessing unit; the first filter and the second filter are in signal connection with the first optical comb-shaped filter, the first filter is used for transmitting the odd waves, and the second filter is used for transmitting the even waves; and the number of thestation sending ends is an even number, and a plurality of station sending ends are halved into two groups. According to the system in the invention, the single-fiber bidirectional optical path is established; meanwhile, the degree of mutual interference of signals during bidirectional transmission is reduced, and the loss of the optical link is reduced.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a single-fiber bidirectional optical line system based on a C-RAN system. Background technique [0002] In the current mobile communication field, the C-RAN architecture mobile communication system based on DWDM (Dense Lightwave Multiplexing) technology has gradually become the best carrier for the distributed 4G communication system; [0003] However, due to the increasing shortage of fiber resources at the access layer, single-fiber bidirectional application scenarios often occur when DWDM equipment is used to carry CPRI (Common Public Radio Interface) services at the access layer; [0004] But in the single-fiber bidirectional application process, the signals interfere with each other, and the optical link has a large loss, which has a certain impact on the daily signal transmission work. Contents of the invention [0005] In view of the defects existing in the prior art...

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Problems solved by technology

[0003] However, due to the increasing shortage of fiber resources at the access layer, single-fiber bidirectional application scenarios often occur when DWDM equipment is used to carry CPRI (Common Public Radio Interface) services at the access layer;

[0004] However, in the application process of single-fiber bidirectional, the signals interfere with each other, and the optical link has a large loss, which has a certain impact on the daily signal transmission work.

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