RAN Node SDT Configuration Management During Handover
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Solution Overview
Problem
Existing technologies face challenges in managing Small Data Transmission (SDT) configurations during handover procedures in wireless communication networks, leading to data communication latency and network inefficiencies.
Innovation Solution
A Radio Access Network (RAN) node discards at least a portion of the SDT configuration received from a source node during handover procedures, while retaining the UE context for effective communication with the user equipment (UE).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RAN node retains the complete SDT configuration during handover, then the UE context is preserved for continuous communication, but the data communication latency increases and network efficiency decreases due to configuration management complexity
Solution Approach 1:
The patent extracts and discards the problematic SDT configuration portion during handover while retaining the essential UE context. This selective extraction resolves the contradiction by removing the source of latency (complete configuration retention) while preserving what is necessary for continuous communication (UE context), thereby reducing data communication latency without sacrificing reliability.
Solution Approach 2:
The patent segments the configuration into two distinct portions: an SDT configuration portion that is discarded and a UE context portion that is retained. This segmentation allows the system to selectively transfer only the necessary UE context during handover, eliminating the latency associated with transferring complete configurations while maintaining reliable UE context preservation.
2Productivity
If the RAN node discards the SDT configuration during handover, then the data communication latency is reduced and network efficiency is improved, but the configuration information may be lost
Solution Approach 1:
The patent applies extraction by removing only the problematic SDT configuration portion while retaining the essential UE context information. This selective extraction improves network efficiency by reducing configuration transfer overhead during handover while preventing loss of critical information needed for UE communication.
Solution Approach 2:
The patent applies local quality by differentiating the treatment of different configuration portions: the SDT configuration portion is discarded (local disposal), while the UE context portion is retained (local preservation). This differentiated approach optimizes network efficiency for the discarded portion while preserving necessary information for the retained portion.
3Duration of action of stationary object
If the RAN node manages complete SDT configurations during handover, then the configuration is preserved for future use, but the device complexity and operational difficulty increase
Solution Approach 1:
The patent extracts and removes the complex SDT configuration management from the handover process by discarding the SDT configuration portion. This extraction simplifies the handover procedure and reduces device complexity while retaining only the essential UE context that needs to be preserved for future communication.
Solution Approach 2:
The patent segments the configuration management task into two separate operations: discarding the SDT configuration portion (simplifying the process) and retaining the UE context portion (preserving necessary information). This segmentation reduces configuration management complexity during handover while maintaining duration of action for essential UE context.
Data Source
AI summary
A method of managing configuration information for SDT operation is performed by a first RAN node. The method includes receiving an RRC message from a UE, receiving, from a second RAN node and during a handover procedure from the second RAN node to the first RAN node, an SDT configuration for use by a UE when the UE is operating in an RRC inactive state, and, after the handover procedure, communicating with the UE operating in the RRC inactive state based on a UE context of the UE.