Radio Bearer Path Configuration After PDCP Duplication Deactivation
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Solution Overview
Problem
The existing technologies are unclear on how to transmit data when the Packet Data Convergence Protocol (PDCP) duplication function of a radio bearer is deactivated, leading to inconsistencies in data reception and transmission modes between network devices and terminals.
Innovation Solution
A method is introduced to determine and utilize at least one transmission path for a radio bearer when the PDCP duplication function is deactivated, using configuration information and deactivation signaling to ensure consistent data transmission and reception modes, including scenarios with single or multiple MAC entities, and employing DC working modes when applicable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP duplication function is deactivated, then data transmission reliability is improved by using a single transmission path, but it becomes unclear how to transmit data leading to inconsistency between network devices and terminals
Solution Approach 1:
The patent applies preliminary action by pre-configuring transmission path selection criteria and fallback mechanisms before PDCP duplication deactivation occurs. The network device and terminal agree in advance on which transmission paths to use when duplication is deactivated, ensuring consistent behavior without real-time negotiation.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of pre-configured transmission path indicators that mediate between the network device's deactivation decision and the terminal's data transmission actions. This intermediary information ensures both parties interpret the deactivation state consistently.
2Device complexity
If PDCP duplication function is deactivated, then device complexity is reduced by eliminating duplicate transmission paths, but data transmission paths become ambiguous
Solution Approach 1:
The patent extracts and removes the ambiguity from the system by separating the transmission path selection logic from the PDCP duplication state. When duplication is deactivated, the system extracts only the necessary single transmission path based on pre-configured criteria, eliminating complex path selection decisions while maintaining operational clarity.
Solution Approach 2:
The patent applies parameter changes by transitioning the transmission path configuration from a multi-path state (during duplication) to a single-path state (after deactivation) based on pre-defined parameters. This parameter transition is governed by predetermined rules that maintain operational simplicity.
3Adaptability or versatility
If transmission paths are not clearly defined when PDCP duplication is deactivated, then adaptability is reduced, but implementing path selection mechanisms increases system complexity
Solution Approach 1:
The patent applies universality by designing a transmission path selection mechanism that serves multiple functions: it works for both PDCP duplication activated and deactivated states, supports different radio bearer types, and handles various deactivation scenarios. This universal approach provides adaptability without requiring separate complex mechanisms for each scenario.
Data Source
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AI summary
This disclosure provides a method for data transmission, a method for information configuration, a terminal, and a network device. The method for data transmission includes: determining at least one transmission path usable for a radio bearer in a case that a PDCP duplication function of the radio bearer changes from an activated state to a deactivated state; and transmitting PDCP data by using the at least one transmission path.