Wireless Base Station RRU Encoding Reduces Transport Data
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Solution Overview
Problem
In clustering wireless base stations, the separation of digital units (DUs) and remote radio units (RRUs) via a transport network leads to increased data transmission requirements due to the performance of physical layer functions like modulation, demodulation, coding, and decoding, which complicates maintenance and increases facility and power costs.
Innovation Solution
The implementation of a wireless base station architecture where each RRU performs physical layer functions such as encoding, modulation, and demodulation, with DUs handling medium access control and decoding, reducing the amount of data exchanged through the transport network by shifting these functions from DUs to RRUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If DUs and RRUs are separated and connected through a transport network, then maintenance becomes easier and installation area is minimized, but data transmission amount through the transport network increases
Solution Approach 1:
The base station is segmented into distributed RRUs and a centralized DU group, with each RRU handling local physical layer functions (encoding, modulation, demodulation, decoding) independently. This segmentation allows maintenance of individual RRUs without affecting the entire system while minimizing data transmission through the transport network by processing data locally at each RRU.
2Adaptability or versatility
If DUs perform modulation, demodulation, coding, and decoding, then communication functionality is achieved, but data transmission amount through the transport network increases
Solution Approach 1:
Instead of having the centralized DU perform all physical layer functions (modulation, demodulation, coding, decoding) and transmit processed data through the transport network, the invention inverts the architecture by placing these functions directly in the distributed RRUs. This allows RRUs to process data locally and transmit only essential control signals and user data through the transport network, significantly reducing data transmission amount while maintaining full communication functionality.
Data Source
AI summary
A clustering wireless base station includes a group digital processor including a plurality of digital units (DU) and a plurality of remote radio frequency units (RRU) that are connected to the group digital processor through a transport network and that are installed in each service target area. In this case, each DU includes a decoder that decodes upward data that is received from the each DU, and each RRU includes an encoder that encodes downward data from the each DU.