Conditional Handover Resource Reservation via Extension Indications
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Solution Overview
Problem
Conditional handovers in wireless communication systems lead to uncertainty in resource reservation, resulting in wasted network resources due to unnecessary long reservations and incorrect target network entity selection, which reduces radio resources available for data transmission.
Innovation Solution
A method and apparatus for transmitting handover prepare requests with extension indications to target network entities, allowing for more granular control over resource reservation and conditional handover execution, including the option to deactivate conditional handovers temporarily or switch to legacy handovers to reduce resource reservation uncertainty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resources are reserved for conditional handover in advance, then handover execution can be performed, but network resources are wasted due to unnecessary long reservations
Solution Approach 1:
The patent applies preliminary action by reserving resources only when a conditional handover is actually executed, rather than reserving them in advance for all potential conditional handovers. The source network entity receives a handover execution indication from the target network entity before releasing the resources, ensuring resources are available exactly when needed while avoiding prolonged unnecessary reservations that waste network resources.
2Productivity
If handover preparation is performed early, then handover command can be transmitted while UE is still associated with source network entity, but target network entity may be wrong target resulting in cancelled handover and wasted resources
Solution Approach 1:
The patent implements feedback by requiring the target network entity to send a handover execution indication back to the source network entity before resources are released. This feedback mechanism confirms that the selected target network entity is correct and the conditional handover should proceed, preventing wasted resources from preparing handovers to incorrect targets while maintaining efficient early preparation for valid handovers.
Data Source
AI summary
In accordance with some embodiments, a method may include transmitting, by a source network entity, at least one handover prepare request comprising at least one extension indication to a target network entity. The method may further include receiving, by the source network entity, in response to the at least one handover prepare request, at least one handover request response from the target network entity. The method may further include transmitting, by the source network entity, at least one handover command acknowledgement to at least one user equipment based upon the at least one handover request response.