Predictive RRC Re-establishment for LTE Handover Failures
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Solution Overview
Problem
Handover problems in wireless communication networks, specifically during radio resource control (RRC) connection re-establishment procedures, often result in dropped calls due to delays in communicating the UE context and identifying the best access node, leading to failed handovers.
Innovation Solution
A mobile device records failure logs of rejected RRC re-establishment requests and applies predictive intelligence to alter default handover procedures by sending a RRC re-establishment request directly to the stronger access node before connection failure, ensuring the context is available and the request is accepted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device waits for the access node to respond to the RRC re-establishment request, then the device can confirm connection status, but the call may be dropped due to delays in context communication and identification of the best access node
Solution Approach 1:
The mobile device sends the RRC re-establishment request to the best access node before the connection failure is fully processed, based on predictive intelligence from failure logs. This preliminary action allows the access node to prepare and have the UE context ready, eliminating the delay of waiting for context communication after failure detection.
2Ease of operation
If the mobile device sends RRC re-establishment request to the original access node, then the device follows standard procedure, but the request may be rejected due to poor RF signal quality at that location
Solution Approach 1:
The mobile device uses predictive intelligence from failure logs to identify the best access node before connection failure occurs, and sends the RRC re-establishment request to that pre-identified node. This preliminary identification ensures the request is sent to an access node with good RF signal quality, preventing rejection while maintaining procedural simplicity.
3Adaptability or versatility
If the mobile device uses default handover procedures, then the device maintains standard operation, but failed handovers occur in previously-identified problem areas
Solution Approach 1:
The mobile device maintains default handover procedures for normal operation but uses predictive intelligence from failure logs to proactively alter the procedure in previously-identified problem areas. The device pre-identifies the best access node and sends the re-establishment request there instead of following the default procedure, achieving adaptability without sacrificing reliability.
Solution Approach 2:
The mobile device uses failure logs that record historical handover failures as feedback to improve future handover decisions. This feedback mechanism allows the device to learn from past failures and adjust its handover behavior in problem areas, increasing success rate while maintaining flexibility.
Data Source
AI summary
A mobile device, or a server in communication with the mobile device, identifies a failure scenario for previously-failed radio resource control (RRC) connection re-establishment requests, from the mobile device, in a Long-Term Evolution (LTE) network. The mobile device, or server, monitors real-time context data for a match with the failure scenario and applies preemptive settings for an upcoming RRC connection re-establishment attempt in response to identifying a match with the failure scenario. The preemptive settings are configured to maintain an active session between the mobile device and the LTE network.