Conditional Handover Configuration Management in Wireless Suspend-Resume
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Solution Overview
Problem
Current wireless communication systems face challenges in ensuring robustness and minimizing handover interruption time during conditional handover processes, particularly due to the timing and radio conditions affecting the delivery of handover commands, leading to potential handover failures.
Innovation Solution
Implementing conditional handover configurations that allow the wireless device to transition to a sleeping state, discarding associated resources and performing cleanup actions, and providing network nodes with the capability to configure and discard these configurations, ensuring alignment between user equipment and network behavior upon resuming the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device stores conditional handover configurations upon transitioning to sleeping state, then handover robustness is improved, but resource consumption and system complexity increase
Solution Approach 1:
The patent extracts conditional handover configurations from the UE context upon transitioning to sleeping state. The network node discards these configurations and notifies the UE, which then performs cleanup actions. This extraction resolves the contradiction by removing complex configuration management requirements while maintaining handover robustness through network-controlled configuration delivery.
Solution Approach 2:
The network node performs preliminary action by providing conditional handover configurations to the UE before the UE transitions to sleeping state. The network controls when configurations are provided (upon resume) and when they are discarded (upon suspend), eliminating the need for the UE to manage configuration persistence across state transitions.
2Loss of energy
If the wireless device discards conditional handover configurations upon transitioning to sleeping state, then resource consumption is reduced, but handover reliability may deteriorate
Solution Approach 1:
The network node implements feedback mechanisms by monitoring UE state transitions and controlling configuration provision accordingly. When the UE resumes from sleeping state, the network provides conditional handover configurations; when the UE suspends, the network discards configurations and notifies the UE. This feedback loop ensures reliability is maintained through network-controlled configuration delivery while the UE can safely discard configurations to save resources.
3Stability of the object's composition
If conditional handover configurations are maintained across suspend-resume cycles, then connection stability is improved, but network resource usage increases
Solution Approach 1:
The patent implements discarding and recovering of conditional handover configurations through coordinated suspend-resume operations. The network node discards configurations when the UE transitions to sleeping state and recovers them when the UE resumes. This is achieved through network-controlled configuration provision upon resume and discard upon suspend, with the network tracking which configurations need to be restored to maintain connection stability while avoiding unnecessary resource consumption.
Data Source
AI summary
Systems, methods and apparatus are disclosed for handling conditional handover configurations by wireless devices and network nodes.An example method performed by a wireless device includes receiving and storing one or more conditional handover configurations associated with a target cell candidate. The wireless device transitions from a connected state to a sleeping state, where the transition includes discarding the conditional handover configurations. The wireless device releases resources associated with the conditional handover configurations and performs clean up actions relating to conditional handover.An example method performed by a network node includes providing, to a user equipment, one or more conditional handover configurations that are associated with a target cell candidate. The network node transmits, to the user equipment, a message to transition from a connected state to a sleeping state. After transmitting the message, the network node discards the conditional handover configurations.