Measurement Resource Prioritization for Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in LTE-A, the configuration of measurement resources (MRs) can lead to MR collisions when the number of configured MRs exceeds the maximum that a UE can measure in one subframe, resulting in inaccurate Channel Quality Indicators (CQIs) and reduced system throughput, as existing methods either disregard all MRs or fail to specify which MRs to disregard, leading to incorrect scheduling decisions.
Innovation Solution
A method to determine which MR to disregard when an MR collision occurs, by prioritizing MRs and implementing strategies such as not disregarding an MR with lower priority for a specified duration or increasing the priority of MRs based on previous disregarding events, ensuring that more important MRs are measured and less important ones are disregarded in a controlled manner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network configures multiple measurement resources (MRs) for flexible CoMP operation, then the adaptability and versatility of the system is improved, but the device complexity and processing requirements of the UE increase
Solution Approach 1:
The patent segments the set of configured MRs into multiple groups, where each group contains a limited number of MRs that the UE can measure within one subframe. This segmentation allows the system to support multiple CoMP operations while limiting UE processing complexity by dividing the measurement tasks into manageable subsets across different subframes.
2Device complexity
If the maximum number of MRs that a UE can measure in one subframe is limited, then the device complexity is reduced, but the productivity and system throughput decrease due to MR collision
Solution Approach 1:
The patent implements periodic measurement of MRs by configuring different groups of MRs to be measured in different subframes. This periodic action allows the UE to systematically cycle through multiple MR groups over time, ensuring that all configured MRs are measured periodically without requiring simultaneous measurement, thus maintaining system throughput while respecting UE processing limits.
3Device complexity
If the UE disregards the MR with lowest priority during MR collision, then the device complexity is managed, but the measurement precision and reliability of CQI calculation deteriorate
Solution Approach 1:
The patent introduces dynamic priority adjustment where the priority of MRs is not fixed but can change based on whether they are measured in the current subframe. MRs that are not measured in the current subframe have their priority increased for future subframes, creating a dynamic system that adapts to measurement opportunities and prevents permanent disregard of any single MR group, thereby maintaining CQI accuracy over time.
4Ease of operation
If the same MR with lowest priority is always disregarded, then the ease of operation is improved by simple priority-based selection, but the reliability of CQI calculation for that MR deteriorates completely
Solution Approach 1:
The patent implements a feedback mechanism where the measurement outcome (whether an MR was measured or disregarded) feeds back into the priority assignment for the next subframe. MRs that were disregarded in previous subframes have their priority increased, creating a feedback loop that ensures all MRs get measured eventually. This feedback-based dynamic adjustment maintains operational simplicity while preventing permanent exclusion of any MR group.
Data Source
AI summary
There are provided a wireless communication method of configuring a measurement resource and a wireless communication device therefor. The method comprises determining a measurement resource to be disregarded when the number of measurement resources configured in one subframe exceeds the maximum number of measurement resources that a user equipment is able to measure in one subframe, wherein the measurement resource with lower priority is determined to be disregarded, and the measurement resource is not disregarded A times within the duration of N subframes, where A is an integer larger than 1, N corresponds to one plus B*periodicity of the measurement resource, and B is an integer equal to or larger than 1.