Radio Signal Quantization Table Matching for Fronthaul Bandwidth
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Solution Overview
Problem
The separation of demodulation and decoding functions in cellular networks leads to high data transmission rates on the fronthaul network, which are not efficiently managed by existing compression methods, causing potential signal degradation and bandwidth issues.
Innovation Solution
A method and device for optimizing the quantization table based on channel decoding error rates to reduce the transmission rate of soft bits between demodulation and channel decoding devices, using real-time or pre-calculated quantization tables to match the quantization to the signal quality, thereby reducing bandwidth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If demodulation and decoding functions are separated in cellular networks, then functional flexibility and management efficiency are improved, but data transmission rate on fronthaul network increases significantly
Solution Approach 1:
The patent extracts only the essential information from soft bits for transmission over fronthaul. Instead of transmitting all soft bit data, the system identifies and transmits only the most critical components needed for channel decoding, thereby reducing the quantity of transmitted data while maintaining functional separation benefits
Solution Approach 2:
The patent performs preliminary processing of soft bits before transmission. The soft bits are pre-processed to identify and extract key information elements that will be sufficient for decoding, eliminating the need to transmit the complete soft bit sequence and thus reducing fronthaul bandwidth requirements
2Quantity of substance
If existing compression methods are applied to soft bits, then bandwidth is reduced, but signal degradation occurs
Solution Approach 1:
The patent applies different processing treatments to different portions of the soft bit data. Critical information elements are preserved with high fidelity while less critical components are compressed or discarded, achieving local optimization of quality versus bandwidth trade-off
Solution Approach 2:
The patent changes the representation parameters of soft bits from their original high-precision format to a compressed format that retains essential decoding information. This parameter transformation reduces bandwidth consumption while maintaining sufficient signal quality for successful decoding
3Measurement precision
If high data transmission rate is used for soft bits, then decoding accuracy is maintained, but bandwidth requirements increase
Solution Approach 1:
The patent introduces an intermediary processing stage between demodulation and channel decoding. This intermediary extracts and transmits only the essential decoding information over fronthaul, acting as a mediator that reduces bandwidth requirements while preserving the information necessary for accurate decoding
Data Source
AI summary
A method and a device for matching a quantization table of data representative of a radio signal received by a radio antenna of a mobile network. The method includes: obtaining an item of information representative of a channel decoding error rate of a decoded quantized demodulated signal from a demodulation of the radio signal received by the antenna, the demodulated radio signal having been quantized by the quantization table, and the quantized demodulated radio signal having undergone a channel decoding; matching the quantization table when the channel decoding error rate is higher than a determined threshold; and transmitting an item of information representative of the matching of the quantization table to a channel decoding device or to a demodulation device.