Signal Processing Architecture for Multi-Band Split-Mode Fronthaul
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Solution Overview
Problem
Current distributed access network devices require separate installation of RRU and AAU to support different frequency band ranges, leading to high complexity and costs.
Innovation Solution
A signal processing device that supports two different splitting modes, allowing simultaneous support for multiple frequency band ranges, reducing the need for separate deployment of RRU and AAU.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RRU and AAU are deployed separately to support different frequency band ranges, then frequency band coverage is improved, but device complexity and hardware costs increase
Solution Approach 1:
The distributed unit is designed to support multiple splitting modes (Option 6, Option 7, Option 8) within a single device architecture, enabling it to function as both RRU and AAU depending on configuration. This multi-functionality allows the device to cover multiple frequency band ranges without requiring separate dedicated hardware for each mode, thereby reducing deployment complexity while maintaining broad frequency band coverage.
Solution Approach 2:
The system dynamically switches between different splitting modes based on service requirements and frequency band needs. The distributed unit can adapt its operational mode (Option 6 for eCPRI, Option 7 for CPRI, Option 8 for enhanced CPRI) through software configuration rather than hardware changes, providing flexibility in supporting different frequency bands and service types without physical redeployment.
2Adaptability or versatility
If RRU and AAU are deployed separately to support different frequency band ranges, then frequency band coverage is improved, but hardware costs increase
Solution Approach 1:
By designing a single distributed unit that can operate in multiple splitting modes (Option 6, 7, and 8), the system eliminates the need to manufacture and deploy separate RRU and AAU hardware for different frequency bands. This universal design reduces hardware procurement costs, manufacturing complexity, and installation expenses while maintaining comprehensive frequency band coverage capability.
Solution Approach 2:
The invention merges the functionality of RRU and AAU into a single distributed unit that supports multiple splitting modes. This consolidation combines what were previously separate hardware components into one unified device, reducing overall hardware costs, simplifying the bill of materials, and decreasing the number of components that need to be manufactured, stored, and deployed.
3Device complexity
If a single device supports multiple splitting modes, then deployment complexity is reduced, but device functionality requirements increase
Solution Approach 1:
The distributed unit employs dynamic software-based configuration to support multiple splitting modes (Option 6, 7, 8) without requiring complex hardware reconfiguration. The system can switch between different CPRI/eCPRI interface modes and processing architectures through software control, allowing a single device to adapt to different operational requirements while maintaining manageable complexity through standardized hardware platforms.
Data Source
AI summary
This disclosure provides a signal processing device and a data transmission method, and relates to the communication field. A first signal processing device includes: an interface module, configured to perform Ethernet data transmission with a second signal processing device through an optical fiber; a scheduling module, configured to schedule to-be-processed data to a first processing module or a second processing module based on transmission configuration information; the first processing module, configured to process the data from the scheduling module according to a first splitting mode; the second processing module, configured to process the data from the scheduling module according to a second splitting mode.