Frequency Multiplexed SSB Reference Selection for CRB Grid Alignment
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Solution Overview
Problem
Wireless communication systems, particularly those using high radio frequencies, face challenges in determining a common resource block (CRB) grid due to increased path loss and reduced coverage, leading to complexities in synchronization signal block (SSB) acquisition and power consumption issues.
Innovation Solution
The techniques involve selecting a reference SSB from a set of frequency and time multiplexed SSBs based on specific rules, such as frequency allocation or synchronization raster, to determine the CRB grid, with the user equipment (UE) receiving a control message indicating a frequency offset to align with the CRB grid, thereby reducing power consumption and enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency multiplexed SSBs are used to increase coverage and reduce path loss effects, then communication reliability is improved, but device complexity increases due to the need to select reference SSBs and determine CRB grids
Solution Approach 1:
The patent segments the SSB acquisition process by dividing multiple frequency multiplexed SSBs into a manageable set and selecting a reference SSB from this segmented group. This segmentation allows the UE to handle the complexity of multiple SSBs systematically by processing them in organized portions rather than simultaneously
Solution Approach 2:
The patent applies preliminary action by pre-establishing rules for selecting reference SSBs and pre-defining the CRB grid structure before actual communication begins. The frequency offset information is prepared in advance, allowing the UE to quickly align with the CRB grid without complex real-time calculations during active communication
2Reliability
If multiple SSBs are multiplexed in frequency and time to enhance coverage, then communication reliability is improved, but power consumption increases due to extended acquisition time
Solution Approach 1:
The patent uses preliminary action by pre-establishing selection rules for reference SSBs and pre-calculating frequency offsets before the UE needs to acquire synchronization. This preparation reduces the real-time processing time and power consumption during SSB acquisition, as the UE can efficiently navigate the multiplexed SSB structure using predetermined guidelines
Solution Approach 2:
The patent extracts the essential information needed for CRB grid determination from the multiple multiplexed SSBs by selecting only the reference SSB that contains the necessary frequency offset information. This extraction approach allows the UE to acquire synchronization without processing all multiplexed SSBs, thereby reducing power consumption while maintaining reliability
3Measurement precision
If frequency offset information is provided to align CRB grid with reference SSB, then measurement precision is improved, but loss of information increases due to the need to process control messages
Solution Approach 1:
The patent extracts only the essential frequency offset information from the control messages associated with multiplexed SSBs, rather than processing all available information. This selective extraction provides the precise measurement data needed for CRB grid alignment while minimizing the processing overhead and information loss that would result from attempting to process every detail of the control messages
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may select a reference synchronization signal block (SSB) from a set of multiple SSBs that are multiplexed in time and frequency. The UE may select the reference SSB from the set of multiple SSBs based on a rule. The UE may receive a control message that indicates a frequency offset between a reference frequency for a common resource block (CRB) grid and a resource block (RB) that overlaps in frequency with the selected reference SSB. The UE may communicate using the CRB grid in accordance with the frequency offset.