Synchronous Reconfiguration in 5G Uplink Transmission
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Solution Overview
Problem
The challenge in 5G communication systems is to perform synchronous reconfiguration in mobile networks efficiently, particularly in non-terrestrial networks where seamless coverage is required, especially in areas not covered by terrestrial networks.
Innovation Solution
The method involves receiving a first RRCReconfiguration message in a first cell, performing uplink transmission based on specific configurations, initiating synchronous reconfiguration towards a second cell, stopping the Time Alignment Timer (TAT), and executing distinct sets of actions for different types of synchronous reconfigurations, ultimately allowing uplink transmission in the second cell after successful reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronous reconfiguration is performed in mobile network, then network coverage and reliability are improved, but uplink transmission resource management becomes complex
Solution Approach 1:
The patent changes the state of TAT from running to stopped during synchronous reconfiguration, and modifies uplink transmission parameters (CSI-ReportConfig, SchedulingRequestConfig, SRS-Config) based on reconfiguration type. This parameter transformation enables seamless handover while managing resource complexity through structured configuration changes.
Solution Approach 2:
The patent divides synchronous reconfiguration into two distinct types (first type and second type), each with specific sets of actions. This segmentation allows the system to handle different reconfiguration scenarios with tailored resource management strategies, improving reliability while maintaining manageable complexity through standardized procedures.
2Reliability
If TAT is stopped during synchronous reconfiguration, then reconfiguration synchronization is improved, but uplink transmission continuity may be affected
Solution Approach 1:
The patent performs preliminary configuration of uplink resources (CSI-ReportConfig, SchedulingRequestConfig, SRS-Config) before stopping TAT during synchronous reconfiguration. This preliminary action ensures that uplink transmission can continue seamlessly in the target cell without interruption, maintaining both synchronization reliability and transmission continuity.
3Manufacturing precision
If different sets of actions are performed for different reconfiguration types, then reconfiguration precision is improved, but system complexity increases
Solution Approach 1:
The patent applies different sets of actions (first set for first type, second set for second type) to different reconfiguration scenarios based on local requirements. This local quality approach enables precise reconfiguration tailored to specific needs while maintaining overall system manageability through standardized action sets for each reconfiguration type.
Data Source
AI summary
A method of a wireless user device includes receiving a first RRCReconfiguration message in a first cell, performing uplink transmission in the first cell based on CSI-ReportConfig and SchedulingRequestConfig and SRS-Config while TAT is running, initiating synchronous reconfiguration towards a second cell, stopping TAT, performing first set of actions for the first type synchronous reconfiguration and second set of actions for the second type of synchronous reconfiguration, and performing uplink transmission in the second cell after synchronous reconfiguration.