Inactive Small Data Transmission Thresholds for RRC State Decisions
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Solution Overview
Problem
The uncertainty in how terminal devices calculate the data volume for inactive small data transmission in RRC_INACTIVE state is not explicitly defined, leading to unclear initiation criteria.
Innovation Solution
The terminal device determines a first data volume including the data volume of RRC messages and DRB buffers, comparing it against thresholds for channel quality and data volume to initiate inactive small data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the terminal device uses unclear data volume calculation methods, then the device complexity is reduced, but the measurement precision of data volume determination deteriorates
Solution Approach 1:
The patent introduces specific parameters (data volume threshold, channel quality threshold, RSRP/RSRQ measurements) to transform the unclear data volume calculation into a precise determination process. By changing from abstract calculation to concrete parameter comparison, the patent resolves the contradiction between simplicity and precision.
2Productivity
If the terminal device initiates inactive small data transmission without clear criteria, then the productivity of data transmission is improved, but the reliability of transmission initiation deteriorates
Solution Approach 1:
The patent establishes clear initiation criteria by comparing data volume and channel quality against predefined thresholds. This transforms unreliable arbitrary initiation into reliable threshold-based decision making, resolving the contradiction between transmission efficiency and initiation accuracy.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device continuously monitors data volume and channel quality, comparing them against thresholds to determine transmission initiation. This feedback loop ensures reliable and efficient transmission decisions.
3Reliability
If the terminal device monitors multiple thresholds (data volume and channel quality), then the reliability of transmission decision is improved, but the device complexity increases
Solution Approach 1:
The patent segments the transmission decision process into two independent threshold comparisons: data volume threshold and channel quality threshold. This segmentation makes the complex multi-parameter monitoring manageable by breaking it into simpler, independent evaluation steps.
Data Source
AI summary
Provide are a small data transmission method and apparatus, and a terminal device. The method includes: the terminal device determines a first data amount, which includes a data amount of radio resource control (RRC) messages and a data amount of at least one data radio bearing (DRB) cache; and the terminal device determines, based on the first data amount, whether to initiate an inactive state small data transmission.