Timing Advance Validation for Preconfigured Uplink Resources
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Solution Overview
Problem
In wireless communication systems, particularly in next-generation networks like 5G, there is a challenge in validating the timing advance for preconfigured uplink resources (PUR) due to changes in radio signal measurements, which can lead to invalid timing advances and subsequent transmission failures, especially in multi-beam environments where traditional cell measurement methods are insufficient.
Innovation Solution
The method involves the User Equipment (UE) determining the validity of the timing advance based on the difference between specific measurement results, such as RSRP, at different times, using thresholds configured by the network, to ensure accurate timing advance validation for PUR transmission, thereby preventing transmission failures in multi-beam environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional cell measurement methods are used for timing advance validation, then the validation process is simple, but the accuracy is insufficient in multi-beam environments leading to transmission failures
Solution Approach 1:
The patent applies local quality by transitioning from cell-level measurement to beam-level measurement for timing advance validation. Instead of treating the entire cell uniformly, the method evaluates specific beam measurements (e.g., RSRP of specific beams) to determine timing advance validity. This localized approach at the beam level provides more precise validation accuracy in multi-beam environments while maintaining manageable complexity through targeted measurement selection.
2Reliability
If beam-specific measurement changes are considered for timing advance validation, then transmission reliability improves in multi-beam environments, but the validation complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the measurement parameters from cell-level RSRP to beam-level RSRP and introducing beam-specific thresholds for timing advance validation. The method changes the validation criterion from a single cell measurement to multiple beam measurements with different threshold requirements. This parameter transformation enhances transmission reliability by capturing beam-specific channel conditions while managing complexity through standardized parameter sets configured by the network.
3Reliability
If timing advance validation is performed frequently to ensure accuracy, then transmission errors are reduced, but signaling overhead and processing time increase
Solution Approach 1:
The patent applies preliminary action by performing timing advance validation using beam measurements before actual PUR transmission occurs. The method proactively checks whether the timing advance is still valid by evaluating current beam measurements against configured thresholds, and only allows transmission when validation succeeds. This preliminary validation prevents transmission errors by catching timing advance expiration or invalidation before data transmission, while minimizing time loss through efficient single-shot validation rather than continuous monitoring.
Data Source
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AI summary
A method and device are disclosed from the perspective of a UE (User Equipment). In one embodiment, the method includes the UE receiving a first signaling to configure a preconfigured uplink resource (PUR) to be used in a cell (1005). The method further includes the UE determining whether to use the PUR in the cell at least based on whether a timing advance is valid, wherein whether the timing advance is valid is based on a difference between a first measurement result and a second measurement result, and wherein the first measurement result is not a cell measurement quantity of the cell (1010).