Dynamic L1 Reporting for Inter-Cell Mobility Handover
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Solution Overview
Problem
Existing wireless communications systems lack efficient methods for channel measurement and reporting of inactive cells during inter-cell mobility, leading to increased latency and inefficiencies in handover procedures, particularly for highly-mobile UEs.
Innovation Solution
Implementing dynamic reporting techniques that enable User Equipment (UE) to perform channel measurements and report information for both active and inactive serving cells using Layer 1 (L1) report configurations, which can be updated based on additional control signaling, facilitating seamless mobility and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional handover procedures are used without channel measurement reporting for inactive cells, then device complexity is reduced, but handover latency increases and mobility efficiency deteriorates
Solution Approach 1:
The UE performs channel measurements on inactive serving cells in advance and maintains L1 report configurations before handover is needed. This preliminary action ensures that channel information is already available when handover decisions must be made, eliminating the latency of performing measurements during the handover process itself.
Solution Approach 2:
L1 report configurations act as an intermediary mechanism that structures and manages channel measurement reporting for inactive cells. This intermediary framework enables efficient information exchange between UE and network without requiring complex ad-hoc measurement procedures during handover.
2Adaptability or versatility
If L1 report configurations are updated dynamically based on control signaling, then adaptability to mobility conditions is improved, but device complexity and processing overhead increase
Solution Approach 1:
The L1 report configuration is designed to be dynamically updateable through control signaling from the network. This allows the measurement and reporting parameters to adapt to changing mobility conditions, cell configurations, and network requirements without requiring UE reconfiguration or complex manual adjustments.
Solution Approach 2:
The UE autonomously manages its own L1 report configurations by processing control signaling and updating its measurement procedures accordingly. This self-service capability allows the UE to adapt to mobility conditions without requiring complex network coordination or manual intervention for each configuration change.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive first control signaling indicating a configuration of a set of serving cells for inter-cell mobility procedures and a layer one (L1) report configuration. The UE may transmit, in accordance with the L1 report configuration, an L1 report including channel information associated with one or more cell groups of the set of serving cells, where the one or more cell groups include both active and inactive serving cells for the inter-cell mobility procedures. In some cases, the UE may receive second control signaling modifying the L1 report configuration. The second control signaling may indicate parameters of the L1 report configuration to be updated, such as cells or cell groups to be reported, quantities to measure and/or include in the L1 report, etc. The UE may update the L1 report configuration based on the second control signaling.