SCG Failure Reporting With SN Measurements in Dual Connectivity
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Solution Overview
Problem
In dual connectivity networks, the master node (MN) cannot accurately configure SCG measurements due to lack of understanding of secondary node (SN) configurations, leading to delayed SCG failure reporting and high data transfer interruption.
Innovation Solution
The user equipment (UE) transmits a SCG failure report to the MN, including MN and SN measurement results, using frequency identifiers and beam measurements, enabling the MN to reconfigure the SCG with minimal interruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the MN configures SCG measurements based on limited understanding of SN configurations, then the measurement configuration process is simpler, but the measurement accuracy and failure detection precision deteriorate
Solution Approach 1:
The patent introduces an intermediary mechanism where the SN provides its measurement configuration information to the MN, and the UE uses this information to generate accurate measurement reports. This mediator (SN configuration information) enables the MN to understand the SCG measurement context without directly configuring the measurements, resolving the contradiction between configuration simplicity and measurement accuracy.
Solution Approach 2:
The patent segments the measurement configuration function into two parts: the SN configures the measurement parameters for its own cells, and the MN coordinates the overall measurement reporting process. This segmentation allows each node to operate within its expertise while maintaining system-wide measurement accuracy.
2Reliability
If the UE waits for MN to understand SN configurations before reporting SCG failure, then the MN can make informed recovery decisions, but the failure reporting delay increases
Solution Approach 1:
The patent applies preliminary action by having the UE prepare and transmit the SCG failure report immediately upon detecting a failure, including pre-collected measurement results and SN configuration information. This eliminates waiting time while ensuring the MN receives all necessary information for accurate recovery decisions.
Solution Approach 2:
The patent implements a feedback mechanism where the UE provides comprehensive measurement feedback to the MN upon failure detection. This feedback includes detailed measurement results and SN configuration data, enabling the MN to make informed recovery decisions without requiring additional communication rounds or delay.
3Device complexity
If the UE includes only basic failure information in the report, then the reporting overhead is reduced, but the MN's ability to perform accurate recovery actions deteriorates
Solution Approach 1:
The patent creates a universal failure report structure that serves multiple functions: it provides basic failure information, includes detailed measurement results, and carries SN configuration data. This multi-functional report design enables comprehensive recovery decision-making without requiring separate signaling messages, thus managing overhead while maintaining reliability.
4Speed
If the MN reconfigures SCG without accurate measurement data, then the reconfiguration process is faster, but the network performance optimization deteriorates
Solution Approach 1:
The patent applies preliminary action by having the UE collect and prepare accurate measurement data before the MN performs reconfiguration. The failure report includes pre-computed measurement results that enable the MN to make immediate reconfiguration decisions without requiring additional measurement collection time, thus maintaining both speed and performance optimization.
Data Source
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AI summary
The present disclosure relates to a method performed by a user equipment, UE, in a communication system, the method comprising: detecting a secondary cell group, SCG, failure; setting contents of a radio resource control, RRC, message used to provide SCG failure information by including: a failure type for the SCG failure, available results of measurements on secondary node, SN, radio access technology, RAT, specific frequencies configured to measure by a master node, MN, configuration, and available results of measurements on SN RAT specific frequencies configured to measure by a SN configuration, transmitting, to the MN, the RRC message used to provide SCG failure information.