UE Configuration Conflict Handling in Dual Connectivity
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Solution Overview
Problem
In 5G New Radio (NR) systems, Dual Connectivity (DC) between LTE and NR faces challenges in capability coordination due to differences between the two systems, leading to conflicts where user equipment (UE) receives configurations beyond its capabilities, such as conflicting buffer sizes from LTE and NR nodes.
Innovation Solution
A method for UE to receive configuration information from both a master node and a secondary node, apply the first configuration, and transmit a new configuration request message to the secondary node if the combined configurations exceed its capabilities, including remaining capability information or specific unapplicable elements, allowing for adjusted configuration compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE receives configuration information from both master node and secondary node in dual connectivity, then the network can provide enhanced service coverage and capacity, but configuration conflicts may occur where the combined configurations exceed UE capabilities
Solution Approach 1:
The UE performs preliminary capability assessment by comparing received configurations from master and secondary nodes against its own capability parameters before applying them. This preliminary action identifies potential conflicts and triggers capability notification messages to the network, preventing invalid configurations from being applied.
Solution Approach 2:
The UE sends capability notification messages back to the master and secondary nodes indicating which configurations cannot be applied due to capability constraints. This feedback mechanism enables the network to adjust its configuration requests, ensuring future configurations are within UE capabilities.
2Ease of operation
If the UE applies configuration information from the master node, then the master node's configuration is established, but the secondary node's configuration may conflict and cannot be applied
Solution Approach 1:
The UE segments the configuration application process by treating master node and secondary node configurations separately. It applies master node configurations first, then independently evaluates secondary node configurations against remaining capabilities. This segmentation allows selective application of configurations without requiring both to be simultaneously compatible.
Solution Approach 2:
The configuration application process becomes dynamic rather than static. The UE adjusts which configurations it applies based on real-time capability assessment and network feedback. The system adapts its behavior by selectively applying configurations and negotiating adjustments with the network, rather than rigidly attempting to apply all configurations.
Data Source
AI summary
Method and apparatus for a user equipment (UE) supporting dual connectivity (DC) with a master node and a secondary node are disclosed. According to these, the UE receives first configuration information from the master node and second configuration information from the secondary node. The UE applies the first configuration information first. And, the UE transmits a new configuration request message to the secondary node, if the UE cannot apply the second configuration information after applying the first configuration information.