Terminal Failure Reporting for Robust Handover Configuration
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Solution Overview
Problem
Existing conditional handover and dual active protocol stack (DAPS) mechanisms in UE fail due to improper network side configuration parameters, leading to connection failures during handover or secondary cell addition processes.
Innovation Solution
A method for a terminal to report information on connection failures, including conditional handover failures, reduction in user data interruption (RUDI) failures, and dual active protocol stack (DAPS) failures, along with related time differences and measurement information, to enable the network device to make proper configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conditional handover or DAPS mechanisms are configured with lower thresholds to prevent sudden channel deterioration, then handover robustness is improved, but configuration complexity increases and may lead to improper parameter settings causing connection failures
Solution Approach 1:
The patent implements a feedback mechanism where the terminal reports connection failure information (including RLC failure, handover failure, and DAPS failure) and measurement information back to the network device. The network device uses this feedback to optimize handover configuration parameters, creating a closed-loop system that continuously improves reliability while adapting to actual network conditions, thereby avoiding the need for overly complex static configurations.
Solution Approach 2:
The patent enables dynamic adjustment of handover parameters based on reported failure information. The network device modifies configuration parameters (such as thresholds, timing, and resource allocation) according to the terminal's failure reports and measurement data, allowing the system to adapt parameter values to optimize reliability without increasing inherent configuration complexity.
2Loss of time
If handover thresholds are set lower to detect channel deterioration earlier, then handover timing is improved, but handover failure rate increases due to improper configuration
Solution Approach 1:
The terminal reports detailed failure information including the type of failure (RLC, handover, or DAPS), measurement information, and time difference data back to the network device. This feedback enables the network to analyze whether lower thresholds are causing premature or inappropriate handovers, allowing optimization of threshold settings to achieve early detection without increasing failure rates.
Solution Approach 2:
The patent makes handover thresholds and related parameters dynamic rather than static. The network device adjusts threshold values and timing parameters based on real-time feedback from terminal failure reports and measurement information, allowing the system to adapt threshold sensitivity to current network conditions and terminal capabilities, thereby optimizing both timing and success rate.
3Productivity
If DAPS mechanism is implemented to reduce user data interruption during handover, then data transmission continuity is improved, but connection failure risk increases due to configuration complexity
Solution Approach 1:
The patent specifically includes DAPS failure information in the terminal's reports to the network device. When DAPS handover fails, the terminal reports the failure type and associated measurement information, enabling the network to identify configuration issues specific to DAPS operations. This feedback loop allows optimization of DAPS configuration parameters to maintain data transmission continuity while reducing connection failures.
Solution Approach 2:
The patent segments the handover process into distinct failure types (RLC failure, handover failure, DAPS failure) with specific reporting for each. This segmentation allows the network device to identify and address DAPS-specific configuration issues separately from other handover mechanisms, enabling targeted optimization that maintains productivity while improving connection stability for DAPS operations.
Data Source
AI summary
Embodiments of the disclosure provide an information reporting method, an information receiving method, a terminal and a network device. The information reporting method includes: reporting, to a network device, information of a connection failure or a secondary cell addition failure, wherein the connection failure includes at least one of the following: a conditional handover failure, a reduction in user data interruption (RUDI) failure and a dual active protocol stack (DAPS) failure.