Conditional Handover Storage Using Timer-Based Cell Selection Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems fail to efficiently manage unnecessary conditional handover configuration storage at network nodes due to unclear execution of handover conditions, leading to inefficient resource allocation and potential handover failures.
Innovation Solution
Implementing a method where a communication device indicates to a network node during a cell selection procedure that it has selected a cell while a timer is running, allowing the network node to manage and delete unnecessary conditional handover configurations, thereby optimizing mobility parameter configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network node stores the CHO configuration to ensure handover execution, then handover reliability is improved, but network resource consumption increases due to unnecessary storage
Solution Approach 1:
The network node receives feedback from the UE indicating whether a cell was selected during timer operation. Based on this feedback, the network node determines whether to retain or delete the CHO configuration, thereby avoiding unnecessary storage while ensuring handover reliability when needed.
Solution Approach 2:
The system changes the state of the CHO configuration from stored to deleted based on the parameter indicating whether cell selection occurred during timer operation. This dynamic parameter-based decision optimizes resource usage while maintaining reliability.
2Productivity
If the network node deletes the CHO configuration to free up resources, then network efficiency is improved, but handover execution may fail due to loss of configuration data
Solution Approach 1:
The network node uses feedback from the UE about cell selection during timer operation as a decision criterion. This feedback mechanism ensures configurations are deleted only when handover execution is no longer needed, maintaining reliability while improving efficiency.
Solution Approach 2:
The system performs preliminary cell selection attempts before deleting CHO configurations. By checking whether cell selection occurred during timer operation first, the system ensures handover can be executed if needed before freeing resources.
3Loss of energy
If the UE indicates cell selection during timer operation, then unnecessary CHO storage is reduced, but signaling overhead increases
Solution Approach 1:
The system extracts only the essential information needed for the decision (whether cell was selected during timer operation) and transmits this compact indication to the network node. This minimizes signaling overhead while achieving the goal of reducing unnecessary storage.
Data Source
AI summary
A communication device in a communications network receives a conditional handover configuration (“CHO”) from a first network node. The CHO can include an indication of a second network node. The communication devices stores the CHO. Subsequent to storing the CHO, the communication device determines a radio link failure (“RLF”) associated with the first network node or a handover failure (“HOF”) associated with a handover procedure towards the second network node. Subsequent to determining the RLF or the HOF, the communication device selects a third network node while a timer is running. The communication device transmits an indication to the third network node indicating that the communication device selected a cell hosted by the third network node as part of a cell selection procedure while the timer was running.