Measurement Handling in Multi-RAT User Equipment
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Solution Overview
Problem
Conventional public land mobile networks face inefficiencies in mobility parameter settings and measurement handling, particularly in multi-RAT and multi-frequency environments, leading to unnecessary measurements that reduce customer throughput and measurement reliability.
Innovation Solution
A method where the serving cell base station transmits measurement activation/deactivation information to user equipment, temporarily deactivating or adjusting the frequency and RAT measurements based on specific thresholds and conditions, optimizing measurement needs and reducing unnecessary signaling traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic measurements are triggered to explore neighbour cells in multi-RAT and multi-frequency environments, then mobility and handover reliability are improved, but measurement complexity and terminal processing load increase
Solution Approach 1:
The patent applies local quality by differentiating measurement behaviors based on specific neighbour cell characteristics. Instead of uniform periodic measurements for all cells, the system adjusts measurement triggering based on local conditions such as signal strength thresholds, cell type (intra-frequency vs. inter-frequency vs. inter-RAT), and handover history. This localized adaptation reduces unnecessary measurements while maintaining reliability where needed.
Solution Approach 2:
The measurement configuration is made dynamic through continuous monitoring of serving cell signal conditions and handover outcomes. The system adapts measurement periodicity and triggering conditions in real-time based on actual network conditions, transitioning between aggressive measurement modes (when handover is needed) and conservative modes (when signal is stable), thereby optimizing the balance between reliability and complexity.
2Adaptability or versatility
If inter-frequency and inter-RAT measurements are performed periodically, then mobility coverage is improved, but data throughput is reduced due to transmission gaps
Solution Approach 1:
The patent implements partial action by selecting only the necessary measurement types based on current network conditions and user location. Instead of performing all possible inter-frequency and inter-RAT measurements periodically, the system triggers measurements selectively - for example, prioritizing intra-frequency measurements when available and reducing or skipping inter-RAT measurements when signal conditions are stable, thereby minimizing throughput impact while maintaining adequate mobility coverage.
Solution Approach 2:
The system dynamically changes measurement parameters such as periodicity, triggering thresholds, and measurement types based on real-time conditions. When the user is in a stable signal environment, measurement periodicity is reduced or paused. When signal degradation or handover opportunities are detected, measurement activity increases. This parameter adaptation optimizes the trade-off between mobility coverage and data throughput.
3Ease of manufacture
If generic measurement configurations are applied to all cells, then network planning complexity is reduced, but measurement reliability is compromised due to unnecessary measurements
Solution Approach 1:
The patent enables self-service by allowing the measurement system to automatically adapt to local conditions without requiring manual network planning for each cell. The terminal autonomously evaluates serving cell signal conditions, neighbour cell characteristics, and handover history to determine appropriate measurement triggering. This self-adjusting mechanism maintains measurement reliability while preserving the simplicity of generic network planning configurations.
Solution Approach 2:
The system incorporates feedback loops that continuously monitor handover outcomes, signal strength changes, and measurement effectiveness. This feedback information is used to refine future measurement triggering decisions, allowing the system to learn from past performance and optimize its behavior. The feedback mechanism ensures measurement reliability while maintaining ease of deployment through automated adaptation.
4Reliability
If measurement triggering thresholds are set low to ensure early target cell identification, then handover reliability is improved, but unnecessary measurements increase reducing throughput
Solution Approach 1:
The patent applies local quality by setting different triggering thresholds for different neighbour cell types and conditions. Instead of a uniform low threshold for all cells, the system uses higher thresholds for intra-frequency cells when signal conditions are stable, while maintaining lower thresholds for inter-RAT cells or cells showing rapid signal degradation. This localized threshold adaptation ensures reliable handover detection when needed while reducing unnecessary measurements that would consume throughput resources.
Data Source
AI summary
A method for improved measurement handling by a user equipment in a multi-Radio Access Technology (RAT) and/or multi-frequency and/or single-frequency radio environment of a public land mobile network includes: transmitting a measurement activation/deactivation information from a serving cell base station to the user equipment, the measurement activation/deactivation information being related to future inter-frequency and/or inter-RAT and/or intra-frequency measurements towards a neighbor cell base station entity to be either activated or set to a non-permanent state.