UE Event Reporting in Multi-RAT Dual Connectivity
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Solution Overview
Problem
In multi-RAT dual connectivity systems, existing methods for reporting event-related information, such as SCG and MCG failures, are insufficient to provide detailed failure information to the network, leading to incomplete understanding of UE-side failures.
Innovation Solution
A method where user equipment (UE) detects events associated with both secondary cell groups (SCGs) and master cell groups (MCGs, stores relevant information, and initiates a radio resource control (RRC) re-establishment procedure to transmit detailed event-related information to the network, including specific parameters like cell identifiers, event types, and measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE reports only SCG failure related information or only MCG failure related information separately, then the reporting process is simple, but the network cannot obtain comprehensive failure information to understand the detailed failure experienced at UE side
Solution Approach 1:
The patent combines SCG failure information and MCG failure information into a single unified failure report. The UE stores both types of failure information in separate storage units and transmits them together through the RRC re-establishment procedure, ensuring the network receives comprehensive failure information in one reporting action rather than requiring separate reporting processes.
Solution Approach 2:
The patent implements preliminary storage of failure information in the UE before transmission. The UE maintains failure information storage units that pre-store SCG failure information, MCG failure information, and measurement results. When failure occurs, this pre-stored information is immediately available for reporting through RRC re-establishment, eliminating the need for complex real-time information gathering during the failure event.
2Reliability
If the UE stores and transmits detailed event related information including multiple parameters, then the network gains comprehensive understanding of failures, but the information storage and transmission complexity increases
Solution Approach 1:
The patent segments failure information into distinct structured components: SCG failure information storage unit, MCG failure information storage unit, and measurement results storage unit. Each unit stores specific parameters (such as failed cell identifiers, failure causes, measurement results) in an organized manner. This segmentation allows the UE to systematically manage and transmit comprehensive failure data without overwhelming complexity in the storage and retrieval process.
3Loss of information
If the UE initiates RRC re-establishment procedure to transmit event related information, then the network receives detailed failure information, but the re-establishment procedure overhead increases
Solution Approach 1:
The patent enables the UE to autonomously prepare and transmit failure information through the RRC re-establishment procedure without requiring additional network signaling or coordination. The UE independently stores failure information, determines when re-establishment is needed, and includes the failure information in the re-establishment request message. This self-service approach allows failure information transmission to occur as a byproduct of the necessary re-establishment procedure, avoiding separate reporting overhead.
Data Source
AI summary
The present disclosure relates to a methods and apparatuses for reporting event related information. One embodiment of the present disclosure provides a method performed by a user equipment (UE), which includes: detecting a first event associated with a source secondary cell group (SCG) or a target SCG; detecting a second event associated with a master cell group (MCG); and storing event related information associated with the first event and the second event for transmission to the network.