Buffer Synchronization Checksum for LTE Compression
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Solution Overview
Problem
In LTE or LTE-Advanced systems, there is no existing solution to check if the compression and decompression buffers of user equipment (UE) and eNodeB are in sync, which can lead to failed decompression and affect uplink transmission efficiency.
Innovation Solution
A method where the transmitting device determines sampling positions in the compression buffer, generates a checksum, and includes it in a UDC compressed data packet, allowing the receiving device to determine if the buffers are in sync by comparing the checksum with one generated from the decompression buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cross packet compression is adopted for UDC function, then compression performance is improved, but buffer synchronization cannot be verified causing decompression failures
Solution Approach 1:
The patent implements a feedback mechanism by calculating and transmitting checksums from the compression buffer state. The receiving device compares these checksums with its own buffer state checksums to detect desynchronization. This feedback loop enables verification of buffer synchronization without compromising compression performance, resolving the contradiction between improved compression and reliable decompression.
Solution Approach 2:
The patent introduces checksums as an intermediary element that mediates between the compression and decompression processes. These checksums serve as verification tokens that allow the receiving device to check buffer synchronization status without interfering with the compression operation itself, thus maintaining high compression performance while ensuring decompression reliability.
2Device complexity
If no buffer synchronization checking mechanism is implemented, then device complexity is reduced, but transmission reliability deteriorates due to undetected buffer desynchronization
Solution Approach 1:
The patent applies partial action by implementing buffer synchronization checking only at critical points through checksum verification, rather than continuous monitoring. This selective approach maintains low system complexity while providing sufficient reliability checks to detect and handle buffer desynchronization events effectively.
Solution Approach 2:
The checksum mechanism serves as a lightweight intermediary that enables reliability verification without significantly increasing system complexity. By using simple checksum calculations and comparisons rather than complex synchronization protocols, the patent achieves transmission reliability with minimal added complexity.
3Speed
If buffer desynchronization is not detected, then processing speed is maintained, but data integrity is compromised due to failed decompression
Solution Approach 1:
The patent performs preliminary buffer state verification through checksum calculation before decompression operations. By checking synchronization status in advance using these checksums, the system prevents failed decompression attempts, ensuring data integrity while maintaining processing speed through efficient pre-validation rather than post-processing checks.
Solution Approach 2:
The checksum feedback mechanism provides real-time information about buffer synchronization status, enabling the receiving device to detect desynchronization before it causes data integrity loss. This feedback allows for timely corrective actions while maintaining processing speed, as the verification is integrated into the existing data flow without requiring additional processing cycles.
Data Source
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AI summary
A synchronization method and apparatus, for use in solving the problem in respect of prior art solutions for verifying whether data cached by a base station and data cached by a terminal are synchronized. In embodiments of the present invention, a transmitting device and a receiving device generate cache check values on the basis of a predetermined acquisition mode; the receiving device compares the cache check values, and according to the comparison result, determines whether a decompression cache area and a compression cache area are synchronized. According to the present invention, a transmitting device and a receiving device sample some data from a data cache area by means of the same acquisition mode to generate cache check values, and the receiving device compares the cache check values, and according to the comparison result, determines whether the decompression cache area and the compression cache area are synchronized; if the cache check values are the same, it indicates that caches of the transmitting device and the receiving device are synchronized; and if the cache check values are different, it indicates that caches of the transmitting device and the receiving device are not synchronized. Thus, it is verified whether data cached by a base station and data cached by a terminal are synchronized, and the transmission efficiency is improved.