Handover Based on Wireless UE Capabilities
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Solution Overview
Problem
The increasing load on Evolved Universal Terrestrial Radio Access Network Dual Connectivity (EN-DC) access nodes in wireless communication networks leads to instances of overload, making it difficult for source access nodes to efficiently hand over dual connectivity wireless user devices to loaded EN-DC nodes, resulting in suboptimal service quality.
Innovation Solution
A method where the source wireless access node determines to hand over a wireless User Equipment (UE) to a target access node based on UE capabilities, by receiving and analyzing signal strength indicators and UE load information, and then directs the UE to remove capabilities for overloaded frequency bands, thereby preventing attachment to overloaded bands and ensuring efficient handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the source access node hands over dual connectivity wireless user devices to EN-DC nodes, then the wireless communication service is transferred, but the EN-DC nodes become overloaded and service quality decreases
Solution Approach 1:
The source access node performs preliminary actions by identifying UE capabilities before handover and removing capabilities for overloaded frequency bands from the UE capability set. This prevents the UE from attempting to attach to overloaded bands, thereby avoiding EN-DC node overload while maintaining efficient handover.
2Reliability
If the source access node removes UE capabilities for overloaded frequency bands, then EN-DC node overload is prevented, but the UE capability set is modified
Solution Approach 1:
The source access node acts as an intermediary by modifying the UE capability set before handover. It removes capabilities for overloaded frequency bands from the UE capability information that is transmitted to the target access node, thereby preventing the UE from attaching to overloaded bands without requiring changes to the UE itself.
3Reliability
If the source access node signals the target node to serve the UE without certain capabilities, then attachment to overloaded bands is prevented, but the handover signaling is more complex
Solution Approach 1:
The source access node extracts and removes the problematic capability information for overloaded frequency bands from the UE capability set before transmitting it to the target access node. This extraction prevents the target node from assigning the UE to overloaded bands, thereby maintaining reliability while managing the signaling complexity.
Data Source
AI summary
A source wireless access node handsover a wireless User Equipment (UE) to a target wireless access node based on UE capability. The source node receives UE capabilities for the UE. The source node receives a source signal strength indicator for the UE and the source node. The source node receives a target signal strength indicator for the UE and the target node. The source node determines to handover the UE to the target node based on the source signal strength indicator and the target signal strength indicator. In response to the handover determination, the source node identifies a UE capability to disable. The source node signals the target node to serve the UE. The source node signals the UE to wirelessly attach to the target wireless access node without reporting the identified UE capability. The UE wirelessly attaches to the target node without reporting the identified UE capability.