Radio Resource Management Measurement Priority Control
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Solution Overview
Problem
The complexity of radio resource management (RRM) measurements in wireless communication systems, particularly when both NR and LTE are co-existing, poses challenges due to differences in signal periodicity and carrier frequencies, making it difficult for wireless communication devices to efficiently monitor and prioritize RRM measurements across multiple radio access technologies (RATs).
Innovation Solution
A method is introduced where a wireless communication device identifies criteria for RRM measurements across multiple RATs, assigns priority values based on parameters such as signal strength, frequency of RRM measurement opportunities, and hardware resource requirements, and executes RRM measurements accordingly, ensuring that RATs with scarce measurement opportunities are prioritized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless communication device simultaneously monitors multiple RATs for mobility, then mobility performance and system capacity are improved, but measurement complexity and device resource requirements increase significantly
Solution Approach 1:
The patent segments RRM measurements into two distinct types: intra-RAT measurements (within the same radio access technology) and inter-RAT measurements (across different radio access technologies). This segmentation allows the device to apply different measurement procedures, resource allocations, and priority rules to each type, thereby managing the overall measurement complexity while maintaining multi-RAT monitoring capabilities
Solution Approach 2:
The patent introduces dynamic priority assignment where the priority of inter-RAT measurements is adjusted based on current radio conditions, particularly when the serving cell quality deteriorates. This dynamic approach allows the device to adaptively allocate measurement resources, increasing inter-RAT measurement priority only when necessary for mobility decisions, rather than continuously monitoring all RATs at maximum intensity
2Reliability
If RRM measurements are performed frequently to ensure accurate mobility decisions, then mobility performance is improved, but device energy consumption and processing load increase
Solution Approach 1:
The patent implements preliminary assessment of serving cell quality before initiating or intensifying inter-RAT measurements. By first evaluating whether the current serving cell meets quality thresholds, the system avoids unnecessary frequent measurements when conditions are good, thereby reducing energy consumption while maintaining reliable mobility decisions when they are actually needed
3Reliability
If the device prioritizes inter-RAT measurements when serving cell quality deteriorates, then handover reliability is improved, but measurement resource allocation becomes more complex
Solution Approach 1:
The patent applies different measurement quality and priority levels to different scenarios: when serving cell quality is good, inter-RAT measurements are performed with lower priority and less frequent resources; when serving cell quality deteriorates, the priority and resource allocation for inter-RAT measurements is locally increased. This local quality adjustment ensures handover reliability when needed without maintaining high complexity across all operating conditions
Data Source
AI summary
A method of a wireless communication apparatus is disclosed, for measurement control of a wireless communication device (WCD) configured to communicate using either of a plurality of radio access technologies (RAT:s). The method comprises identifying that a first criterion is fulfilled for radio resource management (RRM) in relation to two or more of the RAT:s, and causing the WCD to execute a wireless communication scan to detect wireless communication signaling associated with the two or more RAT:s. When wireless communication signaling is detected for at least two of the two or more RAT:s, the method comprises assigning a priority value to RRM measurements of each of the at least two RAT:s based on one or more parameters related to the respective RAT, and causing the WCD to execute RRM measurements based on the priority values. Corresponding arrangement, WCD, network node and computer program product are also disclosed.