CPAC Reconfiguration Failure Handling in Wireless Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In conditional primary secondary cell addition and change (CPAC) procedures, configuration mismatches between user equipment and network nodes can lead to reconfiguration failures, causing service disruptions due to the inability to seamlessly switch between master cell group configurations.
Innovation Solution
The proposed solution involves an apparatus and method for handling reconfiguration failures by evaluating execution conditions, selecting candidate cells, transmitting information about selected cells, and triggering re-establishment procedures with explicit or implicit indications of reconfiguration failures, ensuring that the current master cell group configuration is preserved for re-establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network node switches to a new master cell group configuration upon CPAC execution, then the network can optimize resource allocation and improve service quality, but configuration mismatches between user equipment and network node may occur, leading to reconfiguration failures
Solution Approach 1:
The network node preserves the current master cell group configuration in advance before switching to the new configuration. This preliminary preservation action ensures that if a reconfiguration failure occurs, the network node can fall back to the known good configuration, preventing service disruption and maintaining reliability while still enabling optimization through the new configuration.
2Productivity
If the user equipment applies the new master cell group configuration after CPAC execution, then the service quality can be improved, but the user equipment may fail to apply the configuration correctly, causing reconfiguration failure and service disruption
Solution Approach 1:
The user equipment sends a reconfiguration complete message to the network node to provide feedback on whether the configuration was successfully applied. This feedback mechanism allows the network node to verify the configuration status and take appropriate actions, ensuring reliable configuration application while maintaining the ability to fall back to the current configuration if failures occur.
3Speed
If the network node switches configuration immediately upon CPAC execution, then the network can respond quickly to changing conditions, but configuration mismatches may cause reestablishment procedures and service interruptions
Solution Approach 1:
The network node preserves the current master cell group configuration before switching to the new configuration. This preliminary preservation ensures that the network can quickly switch configurations for rapid response to changing conditions while having a backup configuration ready to prevent service interruptions in case of mismatches or failures.
Data Source
AI summary
There is provided an apparatus comprising means for: receiving, from a network node, at least one conditional primary secondary cell change and addition reconfiguration and at least one execution condition associated with at least one candidate primary secondary cell, wherein the reconfiguration comprises at least a new configuration for a master cell group; evaluating the at least one execution condition; determining that an execution condition associated with one of the at least one candidate primary secondary cell is satisfied; selecting the one of the at least one candidate primary secondary cell as a selected candidate cell; transmitting information on the selected candidate cell to the network node using a current master cell group configuration; failing to apply the conditional primary secondary cell change and addition associated with the selected candidate cell and detecting a reconfiguration failure; transmitting a message to trigger a re-establishment procedure, wherein the message comprises an explicit or implicit indication about the conditional primary secondary cell change and addition reconfiguration failure.