PDCP State Variable Reset for Reestablishment Reliability
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Solution Overview
Problem
The handling of state variables during PDCP reestablishment in communication devices is unclear, leading to potential malfunctions as existing standards, such as 3GPP TS 38.323, do not adequately reset RX_DELIV, causing operational issues.
Innovation Solution
A communication device is designed to handle PDCP operations by setting state variables TX_NEXT, RX_NEXT, RX_DELIV, and RX_REORD to initial values during PDCP reestablishment, ensuring proper processing and reordering of PDCP Data Protocol Data Units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing 3GPP standard is followed without resetting RX_DELIV during PDCP reestablishment, then the standard implementation is maintained, but malfunctions occur in PDCP operations
Solution Approach 1:
The patent changes the state of PDCP parameters by resetting RX_DELIV, RX_NEXT, and other state variables to their initial values during PDCP reestablishment. This parameter reset resolves the malfunction by ensuring consistent state management, directly improving reliability without adding operational complexity
2Reliability
If state variables are not reset during PDCP reestablishment, then existing operations are maintained, but communication malfunctions and reordering issues occur
Solution Approach 1:
The patent applies preliminary action by resetting state variables to initial values before resuming normal PDCP operations during reestablishment. This preparatory reset prevents future malfunctions and reordering issues, ensuring reliable operation while maintaining straightforward state variable management
3Stability of the object's composition
If PDCP state variables are reset to initial values during reestablishment, then operational stability is improved, but additional processing steps are required
Solution Approach 1:
The patent stabilizes PDCP operations by systematically resetting state variables (RX_DELIV, RX_NEXT, TX_NEXT, etc.) to their initial values during reestablishment. This parameter change approach ensures operational stability while the reset mechanism itself provides a clear, standardized procedure that doesn't significantly increase procedural complexity
Data Source
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AI summary
A first communication device for handling a PDCP operation comprises at least one storage device for storing instructions and at least one processing circuit coupled to the at least one storage device. The at least one processing circuit is configured to execute the instructions stored in the at least one storage device. The instructions comprise receiving a first plurality of PDCP Data PDUs associated to a radio bearer (RB), from a second communication device; processing the first plurality of PDCP Data PDUs according to a RX_NEXT, a RX_DELIV and a RX_REORD; updating the RX_NEXT, the RX_DELIV and the RX_REORD; performing a PDCP reestablishment; setting the RX_NEXT, the RX_DELIV and the RX_REORD to a plurality of initial values; receiving a second PDCP Data PDU associated to the RB, from the second communication device; and processing the second PDCP Data PDU according to the RX_NEXT, the RX_DELIV and the RX_REORD.