5G Terminal Bitmap Selection for Duplicated Data Transmission
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Solution Overview
Problem
In the 5G system with a dual connection architecture, there is no effective solution for a terminal to select the correct bitmap corresponding to a Master Cell Group (MCG) or Secondary Cell Group (SCG) to control the duplicated data transmission function of a split Data Radio Bearer (DRB), leading to difficulties in activating or deactivating this function.
Innovation Solution
A method where a terminal determines a bit in a received bitmap based on indication information configured for a DRB, using an indication identifier or preset rule, to select the appropriate bitmap for the MCG or SCG, and activates or deactivates the duplicated data transmission function accordingly, with the help of a Packet Data Convergence Protocol (PDCP) entity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal receives two bitmaps from MCG and SCG respectively, then the terminal can control duplicated data transmission function, but the terminal cannot determine which bitmap corresponds to MCG or SCG and cannot determine the correspondence between bitmap bits and split DRB
Solution Approach 1:
The patent introduces an intermediary mechanism (indication information including indication identifier and indication bit) that mediates between the received bitmaps and the split DRB configuration. This intermediary provides the terminal with the necessary mapping information to correctly associate bitmap bits with specific split DRBs and to identify which bitmap corresponds to MCG or SCG, thereby resolving the ambiguity without increasing terminal complexity
Solution Approach 2:
The patent segments the indication information into distinct components: indication identifier (for identifying MCG or SCG) and indication bit (for mapping to specific split DRB). This segmentation allows the terminal to process the information in a structured manner, first selecting the appropriate bitmap based on the indication identifier, then determining the specific bit correspondence using the indication bit, thus simplifying the overall determination process
2Measurement precision
If indication information is configured for each split DRB, then the terminal can accurately control duplicated data transmission function, but the configuration complexity and information overhead increase
Solution Approach 1:
The indication information structure is designed to be universal and applicable to multiple split DRBs simultaneously. The indication bit field can represent multiple bit positions, allowing a single indication information message to configure the correspondence for multiple split DRBs at once, rather than requiring separate configuration for each DRB, thus reducing overall information overhead while maintaining precise control
Data Source
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AI summary
Disclosed in an embodiment of the present invention are a control method for a duplicated data transmission function, a terminal and a computer storage medium, the method comprising a terminal determining a bit in a received bit map according to configured indication information corresponding to a data radio bearer (DRB) and/or a preset rule, the bit map being one from among two received bit maps, the terminal determining a duplicate data transmission function of the DRB to be activated/deactivated on the basis of the indication of the bit.