Differentiated Measurement Offsets for UE Mobility Control
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Solution Overview
Problem
Current wireless communication networks face limitations in configuring measurement offsets for User Equipment (UE) measurements, leading to suboptimal cell selection and increased connection drops and bitrate dips, as existing solutions do not allow for differentiated offsets for various trigger quantities and purposes like coverage and load balancing.
Innovation Solution
Configuring multiple measurement offsets per trigger quantity and RS type, allowing for granular control of measurement report triggering, enabling better optimization of mobility robustness and network performance without impacting other network functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single measurement offset is configured for all measurements, then the configuration is simple, but mobility optimization is insufficient and connection drops increase
Solution Approach 1:
The patent segments the single measurement offset configuration into multiple differentiated offsets: cellIndividualOffset for coverage optimization, q-OffsetFreq for frequency-specific adjustments, and a3-Offset for load balancing. This segmentation allows each offset to be optimized for its specific purpose while maintaining overall configuration manageability.
Solution Approach 2:
The patent applies local quality by enabling different offset values for different measurement purposes and trigger quantities. For example, coverage-critical measurements can use larger offsets while load-balancing measurements use smaller offsets, allowing each local measurement context to have optimized parameters tailored to its specific requirements.
2Reliability
If multiple measurement offsets are configured per trigger quantity and RS type, then mobility robustness is optimized, but configuration complexity increases
Solution Approach 1:
The patent introduces dynamic offset selection where the UE dynamically chooses which offset to apply based on the measurement trigger quantity and RS type. The network can dynamically adjust different offset values for different scenarios (coverage, load balancing, handover), allowing the system to adapt to changing conditions without permanent configuration complexity.
Solution Approach 2:
The patent changes the parameter structure by introducing multiple offset parameters (cellIndividualOffset, q-OffsetFreq, a3-Offset) that can be independently adjusted. This allows the network to fine-tune measurement triggering thresholds for different purposes without changing the overall measurement framework, achieving mobility robustness through parameter optimization rather than structural complexity.
3Measurement precision
If differentiated offsets are used for various purposes, then measurement precision is improved, but the number of parameters increases
Solution Approach 1:
The patent segments measurement offsets into three distinct parameters: cellIndividualOffset for cell-specific adjustments, q-OffsetFreq for frequency-specific adjustments, and a3-Offset for event-triggered measurements. This segmentation allows precise control over measurement triggering for different purposes while organizing parameters in a structured, manageable way that reduces overall configuration burden.
Solution Approach 2:
The patent creates universal offset parameters that serve multiple functions. For example, cellIndividualOffset can be used for both coverage optimization and handover triggering, while q-OffsetFreq applies to both intra-frequency and inter-frequency measurements. This multi-functionality reduces the total number of parameters needed compared to having separate offsets for every possible measurement scenario.
Data Source
AI summary
The embodiments herein relate to a method, performed by a network node (110), for configuring mobility measurements to be performed by a User Equipment, UE, (120). The network node (110) sends a configuration message to the UE (120). The configuration message comprises a plurality of measurement offsets associated to a single measurement object. The measurement offsets indicate offset values for triggering a measurement report. Each of the plurality of measurement report triggering offsets being related to a respective measurement. The embodiments herein further relate to a method, performed by the UE (120), for performing mobility measurements. The UE (120) receives a plurality of measurement offsets associated to a single measurement object, wherein the measurement offsets indicates offset values for triggering a measurement report, and wherein each of the plurality of measurement offsets is related to a respective measurement. The UE (120) further performs a mobility measurement process taking the measurement offset into account for triggering a measurement report transmission.