Terminal Timing Advance Validity Management for 5G Power Reduction
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Solution Overview
Problem
In wireless communication networks, particularly in scenarios involving the Internet of Things and 5G New Radio, terminals face challenges in efficiently managing timing advance (TA) states, leading to increased power consumption and resource utilization when transitioning between RRC-IDLE and RRC-CONNECT states.
Innovation Solution
The proposed solution involves a method and device for processing timing advance (TA) in wireless communication terminals. This includes determining the validity of the TA based on the type of terminal (stationary or non-stationary) and executing specific operations, such as sending random access signals, to recover from an invalid TA state and ensure seamless data transmission in the RRC-IDLE state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal enters RRC-CONNECT state from RRC-IDLE state to send or receive data, then data transmission capability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the TA validity determination adaptive to terminal movement status. The system dynamically adjusts TA validity based on whether the terminal is stationary or non-stationary, allowing the terminal to maintain RRC-IDLE state with valid TA for uplink transmission when appropriate, rather than forcing transitions to RRC-CONNECT state, thus reducing power consumption while maintaining transmission capability
2Measurement precision
If the TA timer times out for a stationary terminal, then TA validity is improved (more stringent check), but data transmission efficiency deteriorates due to frequent random access procedures
Solution Approach 1:
The patent applies local quality by differentiating TA validity determination criteria based on terminal type. For stationary terminals, both TA timer timeout and measurement value change thresholds must be exceeded to invalidate TA, providing locally optimized accuracy for stationary scenarios while avoiding excessive random access procedures that would reduce transmission efficiency
3Measurement precision
If the TA timer times out for a non-stationary terminal, then TA validity is improved (timely update), but system resource consumption increases due to frequent random access procedures
Solution Approach 1:
The patent applies local quality by implementing terminal-type-specific TA validity rules. For non-stationary terminals, TA is invalidated when either the TA timer times out or the measurement value change exceeds the threshold, providing locally optimized timeliness for moving terminals while managing system resource consumption by avoiding unnecessary random access procedures
Data Source
AI summary
Provided are a method and a device for processing a timing advance (TA), and a method and a device for sending indication information. One of the methods includes: in response to a first condition being satisfied, determining that a TA of a terminal is in an invalid state; where the first condition includes at least one of the followings: in response to the terminal being a stationary terminal, a TA timer times out and a change amount of a first measurement value exceeds a first threshold; or in response to the terminal being a non-stationary terminal, the TA timer times out, or the change amount of the first measurement value exceeds the first threshold, or the TA timer times out and the change amount of the first measurement value exceeds the first threshold.