Access Node Secondary-Node-Addition Failure History for UE Connection Control
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Solution Overview
Problem
In wireless communication systems, the process of establishing dual-connectivity service can fail due to various reasons such as technical issues with signaling, incorrect assumptions about coverage strength, and high uplink noise, leading to inefficiencies and failed secondary node additions.
Innovation Solution
A computing system determines the extent of past secondary node-addition failures for access nodes and uses this information to control whether a user equipment (UE) connects with that access node, thereby avoiding nodes with a history of such failures by opting for alternative access nodes with lower failure rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE connects with an access node that has a high rate of secondary-node-addition failures, then the UE may establish dual-connectivity service, but the connection reliability deteriorates due to frequent setup failures
Solution Approach 1:
The UE performs preliminary assessment of access nodes by monitoring secondary-node-addition failure rates before establishing dual-connectivity connections. The UE maintains a list of access nodes with high failure rates and avoids selecting them for connection, thereby preventing unreliable connections before they occur.
Solution Approach 2:
The system implements feedback mechanisms where the UE monitors and reports secondary-node-addition failure rates to the network. This feedback enables the network to identify problematic access nodes and adjust routing or configuration to improve overall connection reliability.
2Reliability
If the UE avoids access nodes with high secondary-node-addition failure rates, then connection reliability improves, but the available coverage area may be reduced
Solution Approach 1:
The UE dynamically adjusts its selection of access nodes based on real-time monitoring of secondary-node-addition failure rates. When access nodes with high failure rates become available, the UE temporarily avoids them but can reconsider them if their performance improves, allowing flexible adaptation to changing network conditions while maintaining reliability.
Solution Approach 2:
The system changes the parameter of access node selection by introducing failure rate thresholds and weights. The UE modifies its connection decisions based on these parameter changes, balancing reliability requirements with coverage availability by selectively avoiding only those nodes that exceed failure rate thresholds.
3Reliability
If the system monitors and tracks secondary-node-addition failure rates for all access nodes, then connection reliability improves, but the system complexity increases
Solution Approach 1:
The UE implements local quality monitoring by tracking secondary-node-addition failure rates specifically for access nodes within its coverage area and connection considerations. Rather than monitoring all access nodes globally, the UE focuses on locally relevant nodes, reducing complexity while maintaining reliability for its specific context.
Solution Approach 2:
The system uses lightweight, temporary data structures to track failure rates, such as simple counters and threshold-based lists that are easily updated and discarded. These disposable tracking mechanisms avoid the need for complex persistent databases or sophisticated analytics systems, reducing overall system complexity.
Data Source
AI summary
A method and system for controlling whether a user equipment device (UE) that is not connected with an access node will connect with the access node. An example method includes making a determination of whether the access node has experienced a threshold high extent of secondary-node-addition failures, each secondary-node addition failure being an instance where the access node attempted secondary-node-addition for dual-connectivity service and the attempted secondary-node-addition failed. And the example method includes using the determination as a basis to control whether the UE that is not connected with the access node will connect with the access node. Without limitation, this example method could be carried out by the UE when the UE is seeking to acquire initial wireless connectivity or considering handover to the access node, or the method could be carried out by a source access node considering handover of the UE to the access node.