Differential Measurement Reporting for Lower-Layer Triggered Mobility
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently reporting reference signal measurements for lower-layer triggered mobility, particularly due to limitations in the number of beams that can be included in a report and the associated overhead.
Innovation Solution
The proposed method involves measuring reference signals associated with cells and beams, generating a report that includes absolute values and differential values of these measurements, and transmitting this report to facilitate handover decisions and mobility procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of beams included in the measurement report is increased, then the mobility decision accuracy is improved, but the reporting overhead and processing complexity increase
Solution Approach 1:
The patent changes the parameter representation format from absolute values to differential values. Instead of reporting each beam measurement as an absolute value, the system reports the difference between the strongest beam and other beams. This parameter transformation reduces the number of bits required for reporting while preserving the relative measurement information needed for accurate mobility decisions.
Solution Approach 2:
The patent applies partial action by reporting only the differential values for beams that are sufficiently strong to impact mobility decisions. Rather than reporting all possible beam measurements with equal detail, the system focuses resources on reporting differentials for beams above a certain threshold, reducing overhead while maintaining decision accuracy.
2Measurement precision
If the number of beams included in the measurement report is increased, then the mobility decision accuracy is improved, but the processing overhead increases
Solution Approach 1:
The patent transforms the measurement parameters from absolute values to differential values, which reduces the processing overhead. By calculating and reporting only the difference between the strongest beam and other beams, the system reduces the computational burden on both the user equipment and the network side, while still providing sufficient information for accurate mobility decisions.
3Device complexity
If differential values are used instead of absolute values, then the reporting overhead is reduced, but the information completeness may be compromised
Solution Approach 1:
The patent uses the strongest beam measurement as an intermediary reference point. Instead of reporting all absolute values, the system reports the differential values relative to the strongest beam. This intermediary approach allows the network to reconstruct the relative ordering and strength differences of all beams without transmitting all absolute values, thus reducing overhead while preserving information completeness.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for differential measurement reporting for lower-layer triggered mobility (LTM). An example method, performed at a wireless node, generally includes measuring reference signals (RSs), wherein each of the RSs is associated with a cell and a beam, generating, based on the measuring, a report that indicates RS measurements associated with different cells, wherein the report indicates: one or more absolute values of one or more of the RS measurements and one or more differential values for other RS measurements, wherein each of the differential values represents a difference in value of one of the other RS measurements relative to one of the one or more absolute values, and outputting the report for transmission.