Early CSI Reporting for Layer 1/2 Triggered Mobility
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) reporting during Light Trucking Mode (LTM) procedures, leading to suboptimal network performance and resource allocation.
Innovation Solution
Implementing a mechanism for early CSI reporting in LTM procedures, allowing wireless devices to provide CSI before transitioning to a new configuration, thereby optimizing resource allocation and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If CSI reporting is performed only after LTM procedure completion, then device complexity is reduced, but network performance and resource allocation efficiency deteriorate
Solution Approach 1:
The patent implements early CSI reporting by triggering CSI measurement and reporting before the LTM procedure is fully completed. The UE performs CSI measurements on the target cell during the LTM procedure execution and reports the CSI to the network in advance, allowing the network to optimize resource allocation and handover decisions before the actual cell transition occurs.
2Productivity
If early CSI reporting is implemented, then resource allocation efficiency is improved, but device complexity and processing overhead increase
Solution Approach 1:
The system triggers CSI reporting in advance by configuring the UE to perform CSI measurements when specific conditions are met (e.g., receiving a handover command or detecting signal quality thresholds). This preliminary CSI collection enables the network to prepare resource allocations before the actual handover, improving efficiency without requiring continuous monitoring throughout the entire LTM procedure.
Solution Approach 2:
The UE autonomously determines when to trigger early CSI reporting based on pre-configured conditions and parameters provided by the network. The device self-manages the measurement and reporting process without requiring continuous network control signaling, reducing processing overhead while maintaining resource allocation efficiency.
3Loss of time
If CSI reporting is delayed until after LTM transition, then latency is reduced, but network responsiveness and adaptability deteriorate
Solution Approach 1:
The patent enables the network to receive CSI information before the LTM procedure completes, allowing proactive resource allocation, beam management, and handover optimization. The network can prepare target cell resources and adjust transmission parameters in advance, significantly improving network responsiveness and adaptability during the transition process.
Data Source
AI summary
A method can include receiving, by a wireless device, configuration parameters, of an early channel state information (CSI) reporting procedure associated with a layer 1/2 triggered mobility (LTM) procedure. The configuration parameters can include a first threshold for a candidate cell selection; a second threshold for a serving cell; and a timer for triggering the early CSI reporting procedure. The method can also include triggering the early CSI reporting procedure in response to an expiry of the timer; a first layer 1 reference signal received power (L1-RSRP) value of a candidate cell being higher than the first threshold; and a second L1-RSRP value of the serving cell being lower than the second threshold. The method can additionally include transmitting, based on the triggering, a CSI report indicating the candidate cell for the LTM procedure.