Radio Access Technology Measurement Control for Handover
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Solution Overview
Problem
User equipment (UE) in wireless telecommunications systems face challenges in efficiently handoff between different radio access technologies (RATs) due to varying radio conditions, leading to potential service disruptions and resource wastage in measuring unnecessary RATs.
Innovation Solution
A method and system for UE to measure radio conditions of available RATs based on prioritized or preferred lists, allowing for seamless handoff to a more suitable RAT when conditions deteriorate, optimizing battery usage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE measures radio conditions of all available RATs, then handoff reliability is improved, but battery consumption increases
Solution Approach 1:
The network performs preliminary actions by providing measurement control information that pre-specifies the sequence and criteria for RAT measurements. This allows the UE to measure radio conditions systematically according to a predetermined plan rather than randomly or exhaustively, reducing unnecessary measurements while ensuring reliable handoff when needed.
Solution Approach 2:
Different RATs are measured with different qualities or depths based on their priority and availability. The system applies local quality by measuring higher-priority RATs more thoroughly while potentially using less thorough measurement for lower-priority RATs, optimizing the balance between measurement accuracy and energy consumption.
2Reliability
If UE measures all available RATs regardless of priority, then handoff suitability is improved, but resource wastage increases
Solution Approach 1:
The measurement process is segmented into prioritized stages. The system divides RAT measurement into segments based on priority levels, measuring high-priority RATs first and only proceeding to lower-priority RATs if necessary. This segmentation prevents wasting resources on measuring all RATs when a suitable high-priority RAT is available.
Solution Approach 2:
The system applies partial action by measuring only the necessary portion of available RATs based on priority criteria. Instead of exhaustively measuring all RATs, the UE performs partial measurement focused on high-priority options, avoiding excessive action on low-value targets while still ensuring adequate handoff suitability.
3Use of energy by moving object
If UE follows prioritized RAT measurement list, then battery usage is optimized, but measurement completeness may be reduced
Solution Approach 1:
The measurement control information includes feedback mechanisms where the network monitors measurement results and can adjust the measurement sequence or criteria dynamically. This feedback loop ensures that measurement completeness is maintained by adapting to changing network conditions while still following the prioritized list to optimize battery usage.
Data Source
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Figure 3
Figure 4a~4b
AI summary
A method is provided for measuring at least one radio condition of each of a plurality of radio access technologies (RATs) 302, 304. The method includes specifying a sequence of the RATs 302, 304, and measuring at least one radio condition of a first RAT 302 in the sequence before measuring at least one radio condition of a second RAT 304 in the sequence.