Master Node Signaling for Candidate PScell Release in MR-DC
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Solution Overview
Problem
Existing telecommunications systems face challenges in efficiently managing the release, cancellation, or deletion of communication resources for candidate conditional handover (CHO) primary secondary cell (PScell)/secondary cell group (SCG) in multi-connectivity operations, leading to long-term resource reservation and inefficient resource recovery.
Innovation Solution
The proposed solution involves a method where a master node (MN) determines the need to release, cancel, or delete candidate target PScell/SCG resources in a candidate target secondary node (SN) involved in a conditional secondary node addition or change multi-RAT dual connectivity procedure. This is achieved through specific signaling procedures, allowing timely recovery and reuse of communication resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If candidate target PScell/SCG resources are reserved for conditional handover procedures, then handover reliability is improved, but resource occupation time increases and resource recovery efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing candidate target PScell/SCG resources in advance during conditional handover preparation, allowing the UE to have pre-configured target resources ready before actual handover execution. This ensures handover reliability while enabling quick transition when conditions are met.
Solution Approach 2:
The patent implements discarding and recovering by releasing the candidate target PScell/SCG resources after the conditional handover is successfully executed or cancelled. The source SN receives notification from the target SN about resource release status, allowing efficient resource recovery and reuse for other purposes, thus reducing occupation time while maintaining reliability during the handover process.
2Reliability
If candidate target PScell/SCG resources are reserved for conditional handover procedures, then handover reliability is improved, but resource recovery efficiency deteriorates
Solution Approach 1:
The patent applies feedback by implementing a notification mechanism where the target SN informs the source SN about the release status of candidate target PScell/SCG resources. This feedback loop ensures that the source SN has accurate information about resource availability, enabling efficient resource management and recovery while maintaining handover reliability through proper resource coordination.
3Manufacturing precision
If signaling procedures are implemented for resource release notification, then resource management accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies universality by integrating the resource release notification function into existing handover signaling procedures between SNs. Rather than creating separate dedicated signaling mechanisms, the solution utilizes existing interface protocols and message structures to convey resource release information, thereby improving resource management accuracy while minimizing additional system complexity.
Data Source
AI summary
Systems and methods for wireless communications are disclosed herein. In one embodiment, a master node (MN) determines that a candidate target PScell/SCG in a candidate target secondary node (SN) needs to be released, canceled, or deleted. The candidate target SN is involved in a conditional SN addition or change multi-RAT dual connectivity (MR-DC) procedure of a wireless communication device. The MN and a source SN are currently configured to provide communication services to the wireless communication device. The MN requests to release, cancel, or delete the at least one candidate target PScell/SCG in the candidate target SN using a first signaling procedure.