OTN Multiplexing for Distributed Base Station Signal Transmission
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Solution Overview
Problem
Current signal transmission methods in distributed base stations are inefficient due to each channel occupying an optical wavelength, leading to low transmission efficiency between the Base Band Unit (BBU) and the Remote Radio Unit (RRU).
Innovation Solution
The implementation of Optical Transport Network (OTN) electrical layer multiplexing and electro-optic conversion to multiplex multiple channels of interface signals into one optical channel for transmission between the BBU and RRU, enhancing signal transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If each channel of interface signals occupies a separate optical wavelength for transmission between BBU and RRU, then signal transmission can be achieved, but transmission efficiency is low and optical fiber resources are wasted
Solution Approach 1:
The patent applies WDM technology to merge multiple interface signal channels onto a single optical fiber by assigning different wavelengths to different channels. The optical wavelength splitting/merging module combines multiple optical signals with different wavelengths into one composite signal for transmission over a single fiber, thereby improving transmission efficiency and reducing optical fiber resource consumption while maintaining the ability to transmit multiple channels simultaneously
2Length of stationary object
If optical amplifiers are added in the optical path to amplify optical signals for long transmission distances, then longer transmission distance is achieved, but system complexity and cost increase
Solution Approach 1:
The patent introduces optical amplifiers as intermediary devices in the optical transmission path. These amplifiers are strategically placed to boost optical signals at intermediate points, enabling long-distance transmission without signal degradation. The amplifiers act as mediators that extend the transmission capability of the optical fiber system while maintaining signal integrity over extended distances
3Reliability
If multiple channels of interface signals are transmitted over separate optical fibers, then each channel has dedicated transmission path, but optical fiber resources are excessively consumed and cost increases
Solution Approach 1:
The patent employs WDM technology to combine multiple interface signal channels onto a single optical fiber by using different wavelengths for different channels. This merging approach allows multiple channels to share the same physical fiber infrastructure, significantly reducing the quantity of optical fiber resources required while maintaining reliable transmission through wavelength-division multiplexing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly improves signal transmission efficiency by multiplexing multiple channels into a single optical channel, reducing the complexity and cost of processing and increasing data transmission rates.
Implementation Method 1
The Wavelength Division Multiplexing (WDM) technology is applied for signal transmission between the BBU and the RRU. That is, as shown in FIG. 2A and FIG. 2B, a WDM wavelength is adopted for each channel of interface signals of the distributed base station in the radio base band pool of the BBU.
Implementation Method 2
for the optical signals that need to pass long transmission distance, an optical amplifier can be added in the optical path to amplifying the optical signals during transmission. In this way, longer transmission distance can be realized
Data Source
Figure 1~2A
Figure 2B
Figure 3~4
AI summary
According to the embodiments of the present invention there are provided a signal transmission processing method and apparatus and a distributed base station are provided. The distributed base station includes a Base Band Unit (BBU) and a Remote Radio Unit (RRU) at least one channel of interface signals of a distributed base station that are sent by one of the BBU and the RRU are obtained ; then are performed optical transport network (OTN) electrical layer multiplexing through encapsulation to generate OTN signal frames; and performing electro-optic conversion to generate a channel of optical signals and transmit the optical signals. On the side of the other of the BBU and RRU, the optical signals are received and the interface signals therein are recovered and then sent to the other BBU and RRU. The present invention can improve the efficiency of signal transmission.