Full Configuration Handover in Wireless Networks
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Solution Overview
Problem
Wireless communication networks face interference and handover challenges due to varying radio access technologies and configurations, leading to potential handover failures and degraded user experience as demand for mobile broadband access increases.
Innovation Solution
Implementing a method where a first base station requests a full configuration from a second base station during handover or secondary node addition, ensuring the exchange of initial parameters rather than delta configurations to maintain accurate and up-to-date settings, thereby reducing handover and secondary node addition failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If delta configuration is used during handover to reduce signaling overhead, then message size is reduced, but configuration accuracy deteriorates leading to handover failures
Solution Approach 1:
The source base station prepares the full target configuration in advance and includes it in the handover request message to the target base station. This preliminary action ensures that the target configuration is validated and ready before handover execution, preventing configuration errors during the actual handover process while maintaining efficient signaling through selective usage of full vs. delta configuration.
Solution Approach 2:
The patent introduces a configuration type indicator parameter that can switch between full configuration and delta configuration modes. This parameter change allows the system to adaptively select the appropriate configuration method based on network conditions and requirements, resolving the contradiction by enabling full configuration when accuracy is critical and delta configuration when overhead reduction is prioritized.
2Reliability
If full configuration is requested during handover to ensure accuracy, then configuration reliability is improved, but signaling overhead increases
Solution Approach 1:
The full target configuration is prepared and included in the handover request message in advance. This allows the target base station to validate the configuration before committing resources, ensuring accuracy while enabling the source base station to make an informed decision about whether to proceed with handover based on configuration validity.
Solution Approach 2:
The target base station autonomously validates the received configuration and sends back a validation result. This self-service mechanism allows the system to ensure configuration accuracy without requiring additional manual intervention or complex coordination between base stations, thereby limiting the increase in signaling overhead to only the essential validation exchange.
3Reliability
If target base station validates configuration before acceptance to prevent errors, then handover reliability is improved, but handover execution time increases
Solution Approach 1:
The configuration validation is performed in advance during the handover preparation phase, before the handover execution phase. By moving the validation action to preliminary stage, the patent ensures that configuration errors are detected early, preventing failed handovers during execution and actually reducing the critical handover execution time while maintaining high reliability.
Solution Approach 2:
The target base station sends a validation result feedback message to the source base station indicating whether the configuration is acceptable. This feedback mechanism enables the source base station to make informed decisions about handover proceeding or aborting based on validation outcomes, ensuring high reliability while keeping the feedback loop efficient and time-bound.
Data Source
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AI summary
Various aspects and techniques for facilitating handovers in communication networks are disclosed. In a particular implementation, a method of wireless communication includes transmitting, from a first base station to a second base station, a handover request message corresponding to a user equipment (UE) associated with the first base station. The handover request message includes a request for full configuration. The method further includes receiving, from the second base station, a handover response message. The handover response message includes an indicator of acceptance of the full configuration. Other aspects and features are also claimed and described.