UE Preferred Configuration Handling Across Dual Connectivity States
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Solution Overview
Problem
Existing technologies do not effectively manage UE preferred configurations when transitioning from a connected state to an inactive state, especially in dual connectivity scenarios involving distributed base stations, and there is ambiguity in handling such configurations when the secondary node does not support the UEAssistanceInformation message.
Innovation Solution
Implement methods in UEs and base stations to manage and release UE preferred configurations during state transitions, including translating configurations for distributed base stations and ensuring compatibility across different network nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the UE transitions from connected state to inactive state, then power consumption is reduced and network resources are released, but the UE preferred configuration is lost and the UE may undesirably revert to single connectivity
Solution Approach 1:
The network node stores the UE preferred configuration before the UE transitions to inactive state. This preliminary storage action ensures that when the UE returns to connected state, the preferred configuration is already available, preventing the need to revert to single connectivity and maintaining dual connectivity reliability.
Solution Approach 2:
The network node acts as an intermediary that holds the UE preferred configuration during the UE's inactive period. This intermediary storage mechanism bridges the gap between the UE's connected and inactive states, ensuring configuration continuity and preventing undesired reversion to single connectivity.
2Productivity
If the UE sends preferred configuration to the secondary node, then resource allocation is optimized for the UE's needs, but the secondary node cannot process the configuration if it does not support UEAssistanceInformation message
Solution Approach 1:
The master node serves as an intermediary that receives the UE preferred configuration and forwards it to the secondary node. This intermediary approach allows legacy secondary nodes that do not support UEAssistanceInformation message to still receive and process the configuration through the master node, maintaining compatibility while enabling optimized resource allocation.
Solution Approach 2:
The configuration management function is segmented between the master node and secondary node. The master node handles the reception and forwarding of preferred configuration, while the secondary node focuses on resource allocation based on the received configuration. This segmentation allows legacy secondary nodes to function without direct support for UEAssistanceInformation message.
3Stability of the object's composition
If the UE maintains preferred configuration during inactive state, then configuration continuity is improved, but memory resources are consumed and configuration may become invalid
Solution Approach 1:
The network node serves as an external intermediary storage for the UE preferred configuration during inactive state. This external storage approach maintains configuration continuity without burdening the UE's memory resources, and allows the network to validate and update the configuration before the UE returns to connected state.
Solution Approach 2:
The network node creates a copy of the UE preferred configuration for storage during the inactive period. This copying mechanism maintains configuration continuity while preserving the UE's memory resources, as the original configuration remains in the UE while a duplicate is stored in the network node.
Data Source
AI summary
To manage a preferred configuration indicative of a maximum allocation preferred by the UE for at least one resource, a UE transmits (802A) the preferred configuration to a RAN, transitions (804A) to a state in which a radio connection between the UE and the RAN is suspended, and releases (806A) the preferred configuration, prior to communicating data over the radio connection.