CSI Report Prioritization for Low-Latency Triggered Mobility
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) reports for mobility enhancement, particularly in heterogeneous networks with varying cell sizes and technologies, leading to suboptimal handover and beam management processes.
Innovation Solution
Implementing a mechanism for early CSI reporting and layer 1/2 triggered mobility procedures, including conditional handover and beam management, to enhance mobility and reduce latency in wireless networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional CSI reporting mechanisms are used, then system simplicity is maintained, but mobility management performance and handover latency are insufficient
Solution Approach 1:
The patent implements early CSI reporting where the UE reports CSI before actual handover is needed, allowing the network to prepare handover parameters in advance. This preliminary action enables smoother transitions and reduces handover latency while maintaining system stability through configured reporting triggers rather than continuous reporting.
Solution Approach 2:
The patent introduces dynamic CSI reporting mechanisms where reporting triggers and configurations can change based on UE mobility state, network conditions, and handover requirements. The system transitions from static reporting schedules to dynamic triggers that activate based on actual network needs, improving mobility management adaptability.
2Measurement precision
If frequent CSI reports are transmitted, then beam alignment accuracy is improved, but signaling overhead and network load increase
Solution Approach 1:
The system performs beam measurement and CSI reporting in advance before handover is actually needed. By pre-measuring beam qualities and reporting early, the network can prepare optimal beam configurations ahead of time, reducing the need for continuous frequent measurements while maintaining adequate beam alignment accuracy.
Solution Approach 2:
The patent implements feedback mechanisms where the network acknowledges and processes CSI reports selectively. The feedback loop allows the network to adjust reporting requirements based on actual handover needs, activating detailed beam reporting only when mobility events occur, thereby reducing unnecessary signaling overhead.
3Loss of time
If handover preparation is accelerated, then handover latency is reduced, but network resource consumption increases
Solution Approach 1:
The patent implements early triggering of handover preparation procedures where the network starts preparing handover parameters and selects target cells before the actual handover moment. This preliminary preparation accelerates the handover execution phase while the network manages resources by preparing multiple potential handover targets in advance rather than consuming resources continuously.
Solution Approach 2:
The system dynamically adjusts handover preparation intensity based on UE mobility patterns and network conditions. When mobility is detected, the network activates enhanced preparation procedures; when stationary, it uses standard procedures. This dynamic approach reduces handover latency when needed while conserving network resources during normal operation.
Data Source
AI summary
A method can include receiving, by a wireless device via a serving cell, first configuration parameters of a layer 1/2 triggered mobility (LTM) procedure and second configuration parameters of a power headroom reporting (PHR) procedure. The method can also include generating a layer 1 (L1) measurement report MAC CE in response to triggering an event-triggered L1 measurement reporting for the LTM procedure. The method can further include a PHR MAC CE in response to triggering the PHR. The method can additionally include determining that the L1 measurement report MAC CE is prioritized over the PHR MAC CE. The method can also include transmitting the L1 measurement report MAC CE based on the determination.