User Equipment RAT Switching via Preliminary Action
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Solution Overview
Problem
Current LTE RAT selection and switching operations in wireless communication systems are limited by slow transition speeds, inability to perform frequent or independent switching, and increased no-service intervals due to unnecessary mode transitions and signal measurement challenges, especially in regions with weak electromagnetic fields or where LTE service is unavailable.
Innovation Solution
A method and apparatus for a User Equipment (UE) to independently switch Radio Access Technologies (RATs) by detecting specific events and satisfying criteria for quick rollback operations, minimizing no-service intervals through simplified signal measurement procedures and reduced network registration failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE performs traditional cell selection or reselection operations to switch RAT, then the UE can select an LTE RAT, but the transition speed is slow and no-service intervals increase
Solution Approach 1:
The network pre-configures the UE with measurement configurations and criteria for quick rollback operations before the actual RAT switching is needed. This allows the UE to have measurement capabilities ready in advance, enabling faster transition when switching conditions are met, thus resolving the contradiction between switching speed and no-service interval.
2Adaptability or versatility
If the UE performs frequent RAT switching operations, then the UE can maintain optimal connection, but the complexity of measurement and evaluation processes increases
Solution Approach 1:
The patent changes the decision parameters for RAT switching by introducing specific evaluation criteria such as data service status, measurement results, and quick rollback conditions. These parameter changes simplify the complexity by providing clear thresholds and conditions for switching decisions, making frequent RAT switching more manageable while maintaining adaptability.
3Ease of operation
If the UE performs RAT switching in regions with weak electromagnetic fields or unavailable LTE service, then the UE can attempt connection, but network registration failures increase
Solution Approach 1:
The system implements feedback mechanisms where the network provides configuration information and the UE reports measurement results. This feedback loop allows the UE to make informed switching decisions based on actual network conditions, reducing registration failures in regions with weak signals or unavailable service while maintaining ease of independent operation.
4Productivity
If the UE performs traditional cell reselection with blind searching, then the UE can find LTE cells, but the operation time and energy consumption increase
Solution Approach 1:
The network provides pre-configured measurement configurations and cell information to the UE before the UE needs to perform blind searching. This preliminary action allows the UE to narrow down potential target cells, significantly reducing the time and energy required for cell search operations while improving overall RAT switching efficiency.
Data Source
AI summary
An apparatus and a method for switching a Radio Access Technology (RAT) by a User Equipment (UE) in a wireless communication system are provided. The method includes detecting an event indicating that the UE should perform a switching operation from a first RAT to a second RAT different from the first RAT occurs while the UE uses the first RAT determining whether a RAT switching operation criterion is satisfied after detecting that the event occurs and if the RAT switching operation criterion is satisfied, performing the switching operation.