CPRI IQ Data Sequencing via Storage Units
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Solution Overview
Problem
Current CPRI protocol-based data transmission systems face high hardware complexity and limited flexibility in adapting to different IQ data placing formats, especially with changes in transmission bandwidth modes, which hampers system upgrades and market competitiveness.
Innovation Solution
A data transmission method and device that utilize multiple storage units, such as RAM, to sequence IQ data according to CPRI basic frame mapping, allowing for flexible IQ data processing by sampling, storing, and combining bits within a single clock cycle, thereby simplifying hardware processing and enabling software-layer upgrades without affecting hardware realization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware-based framing and deframing processing is implemented according to fixed IQ data placing format, then data transmission reliability is ensured, but hardware complexity increases and flexibility decreases
Solution Approach 1:
The patent replaces hardware-based framing/deframing processing with software-based processing on a general-purpose processor. The mechanical/hardware system that was previously dedicated to specific IQ data placing formats is substituted with a software solution that can adapt to different formats through programmable instructions, thereby reducing hardware complexity while maintaining transmission reliability
Solution Approach 2:
The patent implements a universal software-based processing approach that can handle multiple IQ data placing formats (different modes and mixed modes) through a single general-purpose processor. This multi-functional software solution replaces dedicated hardware circuits, enabling the system to adapt to protocol developments and system upgrades without hardware modifications
2Speed
If dedicated hardware circuits are designed for specific IQ data placing formats, then processing speed is maintained, but adaptability to different modes and protocol upgrades deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability by implementing software-based processing that can be reconfigured through register settings and control parameters. The system can dynamically adjust to different IQ data placing formats, transmission modes, and bandwidth requirements by loading appropriate software configurations, transforming a static hardware system into a dynamic adaptable system
Solution Approach 2:
The patent utilizes parameter changes in software configuration (register settings, control words, framing parameters) to adapt the processing to different modes and formats. By changing software parameters rather than hardware structure, the system maintains processing speed while gaining flexibility to accommodate protocol developments and system upgrades
Data Source
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AI summary
Provided is a data transmission method and device. The method includes: receiving IQ data from an uplink; according to the mapping of the IQ data in a Common Public Radio Interface (CPRI) basic frame, utilizing at least one storage unit to sequence the IQ data; combining a control word with the sequenced IQ data to form CPRI data, and transmitting the CPRI data. The solution utilizes at least one storage unit to sequence the IQ data, and extracts the sequenced data for a CPRI framing operation. This solution is simple in hardware processing and low in realization complexity. The change and upgrade of the transmission bandwidth of multiple modes (single mode or mixed mode) during system upgrade only occur on software layer without affecting the realization of hardware, thus having good flexibility.