Mapping Low-Power Sync Signals for Consistent Cell Reselection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio resource management (RRM) techniques in wireless communications systems are deficient, particularly when using low-power synchronization signals (LP-SSs), as they lead to inconsistent measurements and degraded cell reselection performance due to differences in coverage and frequency retuning capabilities between LP-SSs and synchronization signal blocks (SSBs).
Innovation Solution
A framework is introduced to obtain a common metric for LP-SS-based and SSB-based RRM measurements by receiving resource indications for LP-SSs via a low-power wakeup radio, performing cell reselection in idle mode, and mapping received power measurements to a consistent scale with SSB-based measurements, enabling reliable cell association.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low-power synchronization signals (LP-SSs) are used for RRM measurements, then power consumption is reduced, but measurement consistency and cell reselection performance deteriorate
Solution Approach 1:
The patent applies parameter changes by mapping LP-SS received power measurements to the same scale as SSB-based measurements through a transformation function. This allows the UE to use LP-SS measurements (taken with lower-power radio) while maintaining measurement consistency with traditional SSB measurements, thus resolving the contradiction between power consumption and measurement reliability
Solution Approach 2:
The patent introduces an intermediary mapping function that converts LP-SS measurement results into an equivalent scale with SSB measurements. This intermediary transformation layer enables the system to use low-power measurements while maintaining compatibility and consistency with existing SSB-based measurement frameworks
2Use of energy by moving object
If low-power synchronization signals (LP-SSs) are used for RRM measurements, then power efficiency is improved, but cell reselection performance deteriorates
Solution Approach 1:
By transforming LP-SS measurement parameters to match SSB measurement scales, the patent enables the use of low-power measurements without degrading cell reselection performance. The parameter transformation ensures that cell ranking and selection decisions remain accurate even when based on LP-SS measurements
3Reliability
If synchronization signal blocks (SSBs) are used for RRM measurements, then measurement consistency is maintained, but power consumption increases
Solution Approach 1:
The patent segments the measurement function into two parts: LP-SS reception using low-power radio for power-efficient measurements, and a mapping function that translates these measurements to the SSB measurement scale. This segmentation allows the system to achieve both power efficiency and measurement consistency by separating the reception and processing functions
Solution Approach 2:
The mapping function serves as an intermediary that bridges LP-SS measurements and SSB measurement scales, allowing the system to use low-power LP-SS measurements while maintaining the measurement consistency characteristics of SSB-based measurements
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive an indication via a first radio at the UE. The indication may indicate one or more resources for reception of low-power synchronization signals (LP-SSs). The LP-SSs may be associated with a second radio of the UE. The second radio of the UE may be associated with lower power consumption than the first radio at the UE. The UE may receive one or more LP-SSs via the second radio over the one or more resources and in accordance with an idle mode of the UE. The UE may perform a cell reselection in accordance with receiving the one or more LP-SSs while in the idle mode. The UE may associate with one or more network entities in accordance with the cell reselection.