Wireless Bearer Management for Handover Decompression
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Solution Overview
Problem
Wireless communication systems face challenges in managing handovers and radio link failures, particularly in ensuring proper decompression of data units when acknowledgement messages are received out of sequence, leading to inefficiencies and packet loss.
Innovation Solution
A method and apparatus for determining the completion of a handover or radio link failure, and retransmitting data units to enable decompression, by maintaining storage of packets even after receiving out-of-sequence acknowledgement messages, and using status reports to synchronize compression memories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If packets are discarded after receiving out-of-sequence acknowledgement messages, then device memory usage is reduced, but decompression fails and data loss occurs
Solution Approach 1:
The transmitter device performs preliminary action by storing packets in the buffer before handover or radio link failure occurs. This preliminary storage ensures that packets remain available for retransmission after the event, enabling successful decompression at the receiver side even when acknowledgements arrive out of sequence.
2Reliability
If packets are retransmitted after handover or radio link failure, then decompression success improves, but device memory usage increases
Solution Approach 1:
The system performs preliminary action by pre-storing packets in the buffer before handover or radio link failure. This ensures packets are available for retransmission without requiring long-term memory retention, as the buffer is cleared after successful retransmission and decompression.
3Reliability
If packets are stored for retransmission, then packet loss is reduced, but processing complexity increases
Solution Approach 1:
The system uses feedback mechanisms where the transmitter device receives acknowledgement messages from the receiver and determines whether retransmission is needed. The buffer management is controlled by this feedback - packets are retained only when retransmission is required, and released when successfully delivered, optimizing the balance between reliability and complexity.
Data Source
AI summary
Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may determine a completion of a handover or a radio link failure after transmitting a set of physical data units (PDUs). The transmitter device may retransmit a PDU, of the set of PDUs, after completion of the handover or the radio link failure to enable decompression of the set of PDUs. A receiver device may receive the retransmitted PDU. The receiver device may decompress the set of PDUs based at least in part on receiving the retransmitted PDU. Numerous other aspects are provided.