Uplink Access Selection by Channel Quality in Idle Terminals
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Solution Overview
Problem
In idle or inactive states, terminals face increased signaling overheads and power consumption due to initiating complete random access processes for small data transmissions, and there is a need to select channels with higher quality to ensure successful data transmission.
Innovation Solution
A data transmission method where terminals in non-connected states determine the channel quality and select between 2-step and 4-step random access or configured grant (CG) methods based on predefined thresholds to optimize data transmission efficiency and reduce failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete random access process is initiated for small data transmission, then uplink data can be transmitted from idle/inactive state, but signaling overheads and power consumption increase
Solution Approach 1:
The patent segments the random access process into two distinct modes: 2-step random access for good channel conditions and 4-step random access for poor channel conditions. This segmentation allows the terminal to select the appropriate access mode based on channel quality, avoiding unnecessary signaling overhead and power consumption while ensuring reliable uplink data transmission from idle or inactive states
Solution Approach 2:
The patent introduces dynamic selection between different random access modes (2-step or 4-step) based on real-time channel quality assessment. The terminal dynamically adjusts the random access procedure by comparing channel quality against thresholds, enabling adaptive transmission that optimizes power consumption and signaling overhead according to current radio conditions
2Productivity
If 2-step random access is used for uplink data transmission, then transmission efficiency is improved, but transmission may fail when channel quality is poor
Solution Approach 1:
The patent changes the parameter of random access mode selection based on channel quality parameters. By establishing quality thresholds and dynamically switching between 2-step and 4-step random access modes, the system adapts transmission parameters to match channel conditions, ensuring both efficiency when conditions are good and reliability when conditions are poor
Solution Approach 2:
The patent implements a feedback mechanism where the terminal assesses channel quality and uses this information to select the appropriate random access mode. This feedback loop ensures that transmission efficiency is maximized when channel quality is high while maintaining reliability by switching to the more robust 4-step process when channel quality degrades
3Ease of operation
If channel quality is not assessed before transmission, then transmission can be attempted immediately, but resource waste occurs due to transmission failures
Solution Approach 1:
The patent applies preliminary action by requiring the terminal to assess channel quality before initiating random access transmission. This pre-transmission assessment prevents wasteful transmission attempts by evaluating channel conditions first, ensuring that transmission resources are only consumed when the likelihood of successful transmission is adequate
Data Source
AI summary
A method implemented by a terminal, wherein the method comprises obtaining a channel quality of a channel between the terminal and an access network device, wherein the terminal is in a non-connected state, and determining to send uplink data to the access network device in a random access manner or a configured grant (CG) manner when the channel quality is greater than a first threshold, and wherein determining to send the uplink data to the access network device in the random access manner comprises determining to send the uplink data to the access network device in a 2-step random access manner when the channel quality is greater than a second threshold, and determining to send the uplink data to the access network device in a 4-step random access manner when the channel quality is less than the second threshold.