Terminal TA Validation Condition Management
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Solution Overview
Problem
Idle mode terminals face increased overhead when signaling multiple conditions for determining whether to validate Timing Advance (TA), which is necessary for transmitting uplink data using preconfigured uplink resources (PUR).
Innovation Solution
A terminal is equipped with a receiving unit to receive information on activated or deactivated conditions for TA validation and a control unit to independently manage these conditions based on the received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple conditions for TA validation are transmitted from base station to terminal, then the terminal can accurately determine whether to validate TA, but the amount of information (overhead) increases
Solution Approach 1:
The patent divides the TA validation determination into multiple independent conditions (first condition, second condition, third condition). Each condition can be independently activated or deactivated, allowing the terminal to process only the necessary conditions rather than receiving all conditions simultaneously, thus reducing signaling overhead while maintaining accurate TA validation determination.
Solution Approach 2:
The patent introduces dynamic activation/deactivation of conditions based on terminal capability and network configuration. The base station can activate or deactivate specific conditions (e.g., condition based on TA timer expiration, condition based on serving cell change) according to actual needs, making the information transmission adaptive and reducing overhead when not all conditions are required.
2Reliability
If the terminal transmits all conditions to the base station, then the base station has complete information for TA validation, but the amount of information transmission increases
Solution Approach 1:
The patent segments the conditions into distinct categories (first condition: TA timer based, second condition: serving cell based, third condition: other based). The terminal can selectively transmit only the conditions that are activated, reducing the quantity of information transmitted to the base station while ensuring the base station receives complete necessary information for accurate TA validation determination.
Solution Approach 2:
The patent changes the parameter of condition activation status from a fixed state to a dynamic state. The base station can configure which conditions are activated based on network conditions and terminal capabilities, allowing the information transmission volume to be adjusted while maintaining the reliability of TA validation determination through selective condition transmission.
Data Source
AI summary
A terminal includes a receiving unit that receives information indicating whether each condition of one or more conditions for validating a time alignment is activated or deactivated; and a control unit that independently activates or deactivates each condition of the one or more conditions in accordance with the received information.