Conditional PSCell Configuration Feedback in Multi-Connectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conditional configurations in multi-connectivity operations, such as PSCell configurations, can increase signaling overhead and delay configuration application, and may trigger unnecessary procedures, particularly in New Radio (NR) systems with fast fading radio links.
Innovation Solution
A wireless device is configured with conditional PSCell configurations that are applied only when specific conditions are met, allowing the device to defer transmission of acknowledgment messages until the conditions are fulfilled, thereby reducing unnecessary signaling and enabling timely network knowledge of configuration application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user equipment performs handover between two cells simultaneously in multi-connectivity operation, then the user experience is improved, but the network side cannot determine whether to release the second cell due to unclear handover completion status
Solution Approach 1:
The patent introduces a feedback mechanism where the user equipment sends a second indication information to the network side after successfully completing handover to the second cell. This feedback loop allows the network side to accurately determine handover completion status and make informed decisions about cell release, resolving the information loss problem while maintaining improved user experience.
2Device complexity
If the network side releases the second cell without accurate handover completion information, then the procedure is simplified, but the user experience deteriorates due to premature cell release
Solution Approach 1:
The patent implements preliminary action by having the user equipment prepare and send indication information about handover completion status before the network side makes the cell release decision. This allows the network side to have advance knowledge of the handover state and make appropriate decisions, avoiding premature cell release while maintaining procedure manageability.
3Ease of operation
If the network side waits for handover completion before releasing the second cell, then the user experience is maintained, but the time to release the cell is extended
Solution Approach 1:
The patent uses feedback mechanism where the user equipment actively notifies the network side of handover completion status. This allows the network side to release the second cell promptly once handover is confirmed, rather than waiting indefinitely or using complex timing procedures, thus reducing cell release time while maintaining user experience.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A method performed by a wireless device (18) comprises receiving (250), from a master node (12A) for multi-connectivity operation, a configuration message (20) which includes a master configuration (28) and one or more conditional PSCell configurations (22). The method also comprises transmitting (260) a first message (26) in response to the configuration message (20). The first message (26) indicates acknowledgement of receipt, applying of, and/or understanding of the master configuration (28). The method also comprises, after transmitting (260) the first message (26), when the condition for applying the PSCell configuration (22) of at least one of the one or more conditional PSCell configurations (22) is fulfilled, transmitting (270), to the master node (12A), a second message (30) that includes an indication (24) indicating application by the wireless device (18) of the PSCell configuration (22) of at least one of the one or more PSCell configurations (22).