Timing Advance Validation for Idle-State Uplink Transmission
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Solution Overview
Problem
Existing communication protocols in wireless networks, such as those defined by 3GPP for IoT and 5G NR, face inefficiencies in power consumption and resource usage due to the need for terminal devices to transition from an idle state to a connected state for data transmission, especially when Timing Advance (TA) is invalid, leading to unnecessary energy consumption and resource utilization.
Innovation Solution
A method and apparatus for judging the validity of Timing Advance (TA) and initiating a random access procedure when it is invalid, allowing the TA to be updated to a valid state, enabling data transmission on preconfigured channels in the idle or inactive state without full connection establishment, thereby reducing power consumption and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal device transitions from idle state to connected state for data transmission, then data transmission capability is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary validation of Timing Advance (TA) parameters before the terminal device transitions from idle to connected state. By checking TA validity in advance using downlink timing information and comparing against stored uplink timing, the system determines whether the terminal can transmit uplink data without full connection establishment, thus avoiding unnecessary state transitions and reducing power consumption while ensuring transmission capability when needed
2Reliability
If terminal device enters connected state from idle state, then data transmission is enabled, but system resources are consumed
Solution Approach 1:
The network side performs preliminary TA validity checks using downlink timing measurements and stored uplink timing information before requiring the terminal to enter connected state. This preliminary validation determines whether preconfigured uplink resources can be used directly, avoiding the resource overhead of full RRC connection establishment while ensuring transmission capability is maintained
3Measurement precision
If TA validation is performed frequently, then TA validity accuracy is improved, but processing overhead increases
Solution Approach 1:
The terminal device performs self-validation of TA parameters by comparing downlink timing measurements against stored uplink timing information. This self-service approach allows frequent validity checks with minimal network processing overhead, as the terminal autonomously determines whether TA is valid without requiring extensive network-side validation procedures
Data Source
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AI summary
The present application provides a transmission control method and apparatus, a terminal, a base station, a communication system, and a storage medium. The transmission control method comprises: determining the validity of the timing advance (TA); and if the TA is invalid, initiating a random access process.