L1 Mobility Measurement Configuration Management
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Solution Overview
Problem
In wireless communication networks, particularly in L1/L2-centric inter-cell mobility scenarios, existing technologies face challenges in seamlessly transitioning measurement configurations during handovers between areas with and without L1/L2-centric mobility support, leading to inefficiencies in RRM measurement reporting and potential disruptions in network mobility decisions.
Innovation Solution
The method involves a user equipment (UE) receiving lower layer signaling to update its measurement configuration, either by autonomously performing updates or applying stored configurations associated with new transmission configurations, allowing continuous RRM measurement reporting and supporting handovers across different mobility scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network uses explicit RRC signaling for measurement configuration during handover, then measurement configuration can be accurately updated, but signaling overhead and handover latency increase
Solution Approach 1:
The network pre-configures measurement configurations and stores them in the UE before handover occurs. When L1/L2 mobility is triggered, the UE can immediately apply the pre-stored configuration without waiting for RRC reconfiguration signaling, thus reducing handover latency while maintaining measurement accuracy
Solution Approach 2:
The patent uses stored copies of measurement configurations from the source gNB that are transferred to the target gNB context. The UE applies these copied configurations during handover, avoiding the need for complete re-signaling while maintaining measurement continuity and accuracy
2Speed
If the UE applies stored measurement configuration during L1/L2 mobility, then handover speed increases, but measurement configuration may become inconsistent with target cell requirements
Solution Approach 1:
The network monitors UE measurement reports after handover and can detect configuration inconsistencies. When inconsistencies are detected, the network sends corrective RRC signaling to update the measurement configuration, ensuring reliability while maintaining fast initial handover through L1/L2 mechanisms
Solution Approach 2:
The measurement configuration system is designed to be dynamic, allowing the UE to initially apply stored configurations for fast handover, then transition to network-provided configurations when consistency is verified. This dynamic adaptation ensures both speed and reliability
3Measurement precision
If the network maintains separate measurement configurations for L1/L2-centric and non-L1/L2-centric areas, then mobility management accuracy improves, but system complexity increases
Solution Approach 1:
The patent creates a universal measurement configuration management system that can operate in both L1/L2-centric and non-L1/L2-centric areas. The same UE apparatus handles both modes by switching between applying stored configurations (for fast L1/L2 mobility) and using network-provided configurations (for traditional handovers), eliminating the need for separate configuration systems
Data Source
AI summary
A method of operating a user equipment, UE, configured with a plurality of transmission configurations for lower layer mobility and associated with one or more cells, each cell associated with one or more physical cell identities, PCIs, in a wireless communication network is provided. The method includes receiving a lower layer signaling that includes an indication of a change of transmission configuration from a first transmission configuration to a second transmission configuration from the plurality of transmission configurations, and in response to receiving the lower layer signaling, performing the change of transmission configuration and performing an action related to a measurement configuration. The action includes one of performing an update to at least one element in the measurement configuration based on the second transmission configuration, and applying a stored measurement configuration associated with the second transmission configuration.