Conditional Reconfiguration for Wireless Handover Delay Reduction
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Solution Overview
Problem
In wireless communication systems, particularly in Non-Terrestrial Networks (NTN), traditional handover procedures incur significant transmission delays due to the Handover Preparation stage, leading to increased interruption intervals, which are exacerbated by the complex and diverse wireless environments.
Innovation Solution
A method involving conditional reconfiguration, where multiple pieces of configuration sub-information are received, and upon fulfillment of specific conditions, configuration sets are applied and messages are transmitted to maintain a subset of this information, optimizing handover processes to reduce delays and interruption times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedure is used, then handover preparation can be performed, but transmission delay increases and interruption interval extends
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple candidate cells and their associated configuration information before the actual handover is needed. The network side device provides the UE with configuration information of multiple candidate cells in advance, so that when handover is triggered, the UE can directly execute the handover to the prepared candidate cell without going through the entire handover preparation process again, thus reducing transmission delay while maintaining handover reliability.
Solution Approach 2:
The patent segments the handover process into two distinct phases: a preparation phase where multiple candidate cells and their configuration information are pre-identified and provided to the UE, and an execution phase where the UE quickly transitions to the selected candidate cell. This segmentation allows the time-consuming preparation work to be done in advance, separating it from the critical real-time handover execution, thereby reducing overall transmission delay.
2Loss of time
If conditional reconfiguration is adopted, then handover delay is reduced, but configuration management complexity increases
Solution Approach 1:
The patent extracts and processes configuration information from the network side device before the UE needs to execute handover. The network side device provides configuration information of multiple candidate cells to the UE in advance, allowing the UE to store and manage this pre-extracted configuration data locally. This extraction approach simplifies the UE's configuration management by providing all necessary information upfront rather than requiring continuous management and updates during the handover process.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports measurement results and handover status information back to the network side device. This feedback loop allows the network to dynamically adjust the configuration information provided to the UE, ensuring that the configuration management remains efficient and adaptive. The feedback mechanism helps the network optimize the candidate cell selection and configuration provision, reducing the complexity burden on the UE while maintaining low handover delay.
Data Source
AI summary
The present disclosure discloses a method and a device used in a communication node for wireless communications. A communication node receives multiple pieces of configuration sub-information, of which each piece of configuration sub-information comprises one execution condition and one configuration set; in instances when the execution condition in first configuration sub-information is fulfilled, applies the configuration set in the first configuration sub-information, and transmits a first message; in instances when a first condition set is fulfilled after transmitting the first message, maintains a subset of the multiple pieces of configuration sub-information, the subset of the multiple pieces of configuration sub-information at least comprising second configuration sub-information; the first configuration sub-information is any of the multiple pieces of configuration sub-information, and the second configuration sub-information is one of the multiple pieces of configuration sub-information other than the first configuration sub-information.