5G Receiver Self-Stabilization via PRACH Timing Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G network technologies face challenges in real-time adjustment and stabilization of receiver side synchronization, leading to delays and deviations in user data processing, which affects signal decoding accuracy and resource optimization.
Innovation Solution
The method involves initial synchronization and coefficient assessment using PRACH and PUSCH channels, followed by late compensation and power balancing between BBU and RRU, enabling real-time adjustments and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive adjustment method with reference signals is used before deployment, then initial synchronization is achieved, but real-time adjustment and stabilization capability is lost
Solution Approach 1:
The patent transforms the static passive adjustment method into a dynamic active adjustment system by continuously monitoring synchronization status through PRACH channels and dynamically adjusting timing offsets in real-time based on measured delays, enabling the system to adapt to changing conditions after deployment
Solution Approach 2:
The patent implements a feedback mechanism where the GNB continuously measures timing offsets from PRACH preambles, compares them against thresholds, and automatically adjusts the timing advance values sent to UEs, creating a closed-loop control system that maintains synchronization stability
2Measurement precision
If separate hardware sets for DFT processing are used at RRU, then processing accuracy is improved, but device complexity and initial product costs increase
Solution Approach 1:
The patent extracts the DFT processing function from the RRU hardware and relocates it to the BBU software processing unit, eliminating the need for specialized hardware at the RRU while maintaining processing accuracy through software-based implementation
Solution Approach 2:
The patent implements software-based DFT processing in the BBU that replicates the functionality of hardware-based DFT, using algorithmic computation to achieve the same spectral transformation results without requiring dedicated hardware circuits at the RRU
3Productivity
If all time domain data is pushed to BBU with large capacity, then processing capability is improved, but real-time adjustment capability is lost
Solution Approach 1:
The patent extracts only the essential synchronization parameters (timing offsets from PRACH preambles) from the full time domain data and processes them separately in real-time, while the remaining data continues to be processed by the BBU, preventing bottlenecks in the data path
Solution Approach 2:
The patent segments the data processing into two parallel paths: one path handles full data processing at BBU with large capacity, while another path extracts and processes synchronization-critical parameters in real-time, allowing both high productivity and real-time responsiveness
4Device complexity
If passive stability of device is relied upon, then device simplicity is maintained, but accuracy and decoding rate deteriorate due to inability to compensate errors
Solution Approach 1:
The patent implements a feedback mechanism where the GNB continuously measures timing offsets from PRACH preambles, compares them against thresholds, and automatically adjusts the timing advance values sent to UEs, creating a closed-loop control system that maintains synchronization stability
Solution Approach 2:
The system performs self-adjustment by automatically detecting synchronization errors through PRACH measurements and correcting them through dynamic timing advance adjustments without requiring manual intervention or complex additional hardware
Data Source
AI summary
A method of adjusting and self-stabilizing the receiver side in 5G including: initial synchronization set and the set of constructing parameters, collecting the initial defining phase value of the reference channel and data; Determine and evaluate the signal lag and the first crest string capacity on the PRACH (Physical Random Access Channel) offer the first assessment coefficient; Compare the first assessment coefficient to the adjustment requirement if greater than the adjustment threshold continues to process data and evaluate the detailed adjustment of the detailed level on the PUSCH (Physical Uplink Share Chanel) schedule a processing money, giving the second assessment coefficient. If less than the adjustment requirements perform the next step: from the above evaluation coefficients perform late compensation on the conversion card (transfer card-two-way data transfer department from BBU and RRU) and power on RRU with periodic or instant update time according to the adjustment rule.