PDCP Duplicate Data Transmission Control via RLC Indication
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Solution Overview
Problem
In dual connectivity and carrier aggregation scenarios, existing technologies face challenges in effectively managing duplicate data transmission across multiple radio link control entities, leading to inefficiencies in data reliability and resource usage.
Innovation Solution
A method and device that utilize first indication information to activate or deactivate duplicate data transmission functions of PDCP entities and specify the RLC entities for transmitting duplicate data, allowing for effective duplicate data transmission even in mechanisms with more than two copies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicate data transmission is performed across multiple RLC entities, then data transmission reliability is improved, but device complexity increases due to management of multiple entities
Solution Approach 1:
The patent segments the duplicate data transmission function by introducing indication information that separately identifies first RLC entities and second RLC entities. This segmentation allows independent management and control of different RLC entity groups, reducing the complexity of managing multiple entities while maintaining reliability through distributed transmission paths.
Solution Approach 2:
The patent introduces indication information as an intermediary mechanism that mediates between the PDCP entity and multiple RLC entities. This intermediary carries identification information that enables precise control over which RLC entities transmit duplicate data, simplifying the management architecture while ensuring reliable transmission across multiple paths.
2Quantity of substance
If the number of RLC entities associated with PDCP entity is increased, then the number of PDCP PDUs that can be duplicated is increased, but loss of information increases due to potential transmission errors
Solution Approach 1:
The patent implements a feedback mechanism where the network device receives feedback information from the terminal device regarding the status of duplicate data transmission. This feedback enables the network device to monitor transmission quality across multiple RLC entities and adjust transmission strategies accordingly, reducing information loss while maintaining high duplication capacity.
Solution Approach 2:
The patent enables selective activation of duplicate transmission functions for specific PDCP entities based on their requirements. Not all PDCP entities need to duplicate data across all available RLC entities - the indication information allows partial duplication strategies that reduce unnecessary transmission errors while maintaining adequate redundancy for critical data.
3Ease of operation
If indication information is used to specify RLC entities for duplicate data, then ease of operation is improved, but loss of time increases due to processing overhead
Solution Approach 1:
The patent employs preliminary action by pre-configuring indication information that identifies which RLC entities should handle duplicate data transmission. This pre-identification eliminates the need for real-time decision-making during data transmission, reducing processing time overhead while maintaining ease of operation through advance planning of transmission paths.
Data Source
AI summary
Disclosed by the present application is a method used for duplicate data transmission, which may implement effective duplicate data transmission in more than two duplicate data transmission mechanisms. The method comprises: a terminal device receiving first indication information; and the terminal device carrying out processing for a PDCP PDU according to the first indication information, the first indication information being used to indicate that a duplicate data transmission function of at least one PDCP entity is active or inactive and/or indicate an RLC entity used for transmitting duplicate data among a plurality of RLC entities associated with the at least one PDCP entity respectively.