PDCP Decompression Failure Recovery in 5G Uplink Compression
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Solution Overview
Problem
In next-generation mobile communication systems, data decompression failures during uplink data compression can lead to unnecessary data transmission and resource wastage due to checksum failures and synchronization issues between transmitting and receiving PDCP layer devices.
Innovation Solution
The proposed method involves efficient operations for the transmitting-terminal and receiving-terminal PDCP layer devices to prevent unnecessary data transmission by managing checksum failures and decompression errors. This includes initializing the UDC buffer, discarding affected data, and re-synchronizing the compression memory to maintain data integrity and reduce resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink data compression is applied to improve transmission efficiency, then data transmission rate is improved, but data decompression failure occurs due to synchronization issues between transmitting and receiving PDCP layer devices
Solution Approach 1:
The patent implements a feedback mechanism where the receiving PDCP layer device monitors decompression status and sends feedback information to the transmitting device. When a decompression failure is detected, the receiving device notifies the transmitting device, which then discards the failed data and resets the compression memory, ensuring synchronization is restored and preventing continuous transmission errors.
Solution Approach 2:
The patent applies the discarding principle by having the transmitting PDCP layer device discard data that causes decompression failures at the receiving end. When a failure is detected through feedback, the transmitting device discards the problematic data and resets its compression memory, allowing the system to recover from the error state and resume reliable compression transmission.
2Productivity
If compression memory is continuously updated to improve compression efficiency, then compression rate is improved, but synchronization loss occurs between transmitting and receiving devices
Solution Approach 1:
The receiving PDCP layer device continuously monitors whether the compression memory state matches expected values. When a mismatch is detected indicating synchronization loss, the receiving device sends feedback to the transmitting device, which then resets its compression memory to restore synchronization while maintaining efficient compression operation.
Solution Approach 2:
The patent implements a monitoring mechanism that detects synchronization issues before they cause widespread data corruption. By continuously checking compression memory consistency and having ready the ability to reset, the system cushions against synchronization loss and prevents it from propagating through the data transmission stream.
3Speed
If data is transmitted without checking decompression status to improve transmission speed, then transmission latency is reduced, but unnecessary data transmission occurs wasting resources
Solution Approach 1:
The patent implements feedback-based transmission control where the receiving PDCP layer device monitors decompression status and provides feedback to the transmitting device. This feedback mechanism enables the transmitting device to identify which data packets were successfully decompressed and which failed, allowing it to stop transmitting unnecessary data and reset only when needed, thus avoiding resource wastage while maintaining efficient transmission.
Data Source
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AI summary
Disclosed are a communication technique which merges, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and apparatus for driving a PDCP layer apparatus during data decompression failure in a next-generation mobile communication system.