Inter-RAT Mobility Handover Configuration Validation
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Solution Overview
Problem
Current inter-RAT mobility procedures in LTE systems face inefficiencies due to incomplete configuration compliance and protocol errors during handovers, leading to inappropriate operations and connection issues between different radio access technologies.
Innovation Solution
A mobile communications device with a wireless module and controller module that receives handover requests, determines configuration compliance, and initiates connection re-establishment with correct reconfiguration failure causes, ensuring proper resource allocation and handling of dedicated and common radio resources during inter-RAT mobility procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE applies configurations from handover request messages without validation, then handover procedures can be executed quickly, but configuration compliance errors and protocol errors may occur leading to connection failures
Solution Approach 1:
The patent applies preliminary action by validating configuration compliance and detecting protocol errors before the UE actually applies the handover configurations. The controller module checks whether all configurations in the handover request message are compliant and whether protocol errors exist prior to execution, preventing faulty configurations from causing connection failures while maintaining efficient handover when configurations are valid
2Device complexity
If the UE releases all radio resources in the source system after handover, then resource management is simplified, but connection re-establishment becomes inappropriate when configuration failures occur
Solution Approach 1:
The patent implements feedback by having the controller module determine configuration compliance and protocol error status, then provide this information back to decide the appropriate action. When configuration failures or protocol errors are detected, the feedback mechanism triggers connection re-establishment procedures instead of simple resource release, ensuring appropriate handling of failure scenarios while maintaining simplified successful handovers
Data Source
AI summary
A mobile communications device with a wireless module and a controller module is provided. The wireless module performs wireless transmissions and receptions to and from a first service network being an LTE system. The controller module receives, from the first service network, a handover request message for handing over from the first service network to a second service network via the wireless module, and determines whether all configurations in the handover request message are compliable or whether there is a protocol error in the handover request message. Particularly, the second service network utilizes a wireless technology other than the LTE technology, and the handover request message is a MobilityFromEUTRACommand message. Also, the controller module transmits a connection re-establishment request message indicating a reconfiguration failure to the first service network via the wireless module, in response to one of the determinations is positive.