High-Mobility UE Mode Switching for Reliable Cellular Handover
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Solution Overview
Problem
Wireless communications systems face challenges in high mobility scenarios, such as limited coverage, incomplete network configurations, and radio link failures, leading to poor performance, increased latency, and decreased user experience for user equipment (UE) in environments like subways and high-speed trains.
Innovation Solution
UEs detect triggering conditions indicating high mobility and switch to a specialized operating mode, performing optimized mobility procedures, such as handovers and measurement reporting, based on cell maps and sensor inputs to improve connectivity and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs use default operating mode in high mobility scenarios, then device complexity is reduced, but reliability deteriorates due to radio link failures and handover issues
Solution Approach 1:
The system dynamically switches between default operating mode and high mobility operating mode based on detected triggering conditions. The UE adapts its mobility management behavior in real-time, activating specialized procedures only when high mobility conditions are detected, thus improving reliability without permanently increasing device complexity.
Solution Approach 2:
The patent changes operational parameters by introducing a high mobility operating mode with modified handover thresholds, measurement reporting configurations, and cell reselection parameters. These parameter adjustments optimize performance for high mobility scenarios while maintaining standard operation in normal conditions.
2Loss of time
If UEs perform standard handover procedures in high mobility scenarios, then device complexity is minimized, but loss of time increases due to failed handovers and reconnection delays
Solution Approach 1:
The system performs preliminary actions by detecting triggering conditions and switching to high mobility mode before actual handover operations. This proactive approach allows the UE to pre-configure optimized parameters and predict mobility patterns, reducing handover latency by preparing in advance rather than reacting to failures.
Solution Approach 2:
The patent implements feedback mechanisms where the UE continuously monitors mobility conditions, detects triggering events, and adjusts its operating mode accordingly. This closed-loop control enables the system to learn from past handover outcomes and optimize future handover timing and target selection, reducing overall handover latency.
3Reliability
If UEs use default measurement reporting in high mobility scenarios, then ease of operation is maintained, but reliability deteriorates due to incomplete network configurations
Solution Approach 1:
The patent segments mobility management into distinct operating modes: default mode for normal conditions and high mobility mode for detected triggering conditions. Each mode has specialized measurement reporting configurations tailored to its specific requirements, allowing reliable operation in high mobility scenarios without complicating the user experience through a unified complex system.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may detect one or more triggering conditions indicating that the UE is traveling along the route, and should enter the high mobility operating mode to improve mobility procedure performance or processor performance. Upon entering the high mobility operating mode, the UE may perform mobility procedures, handover procedures, cell selection or reselection, or connection procedures. For example, the UE may determine which cell it is approaching, and which cell it is leaving, along the route, which may allow the UE to avoid being assigned to handover to a cell that it is leaving, prioritize or deprioritize measurement reports for UEs that the UE is leaving or approaching, update the contents or timing of measurement reporting, or the like.