SSB Beam Status Notifications for Low-Latency Positioning
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Solution Overview
Problem
Current wireless communication systems lack the ability for network components, such as gNB or TRP, to indicate status changes like cell or SSB beam activation/deactivation, which affects positioning accuracy and power consumption during Network Energy Saving (NES) procedures.
Innovation Solution
Implementing a status change notification function that allows network components to register and notify a position estimation entity about changes in parameters like SSB or beam status, enabling the entity to adjust positioning sessions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If network components activate/deactivate cells or SSB beams for energy saving, then power consumption is reduced, but positioning accuracy deteriorates
Solution Approach 1:
The network component sends a status change notification to the position estimation entity before actually deactivating the cell or SSB beam. This preliminary notification allows the position estimation entity to proactively adjust or terminate positioning sessions that would be affected by the upcoming status change, ensuring continuous positioning accuracy while enabling energy saving operations.
2Use of energy by stationary object
If network components frequently adjust cell or beam status for energy saving, then power consumption is reduced, but system latency increases
Solution Approach 1:
By notifying the position estimation entity in advance of cell or beam status changes, the system allows the entity to perform adjustments proactively rather than reactively. This eliminates waiting time and positioning session interruption delays, reducing overall latency while maintaining energy saving benefits.
3Measurement precision
If network components maintain continuous cell or beam activation for positioning accuracy, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The system implements a feedback mechanism where the network component notifies the position estimation entity of upcoming status changes. This feedback loop enables the position estimation entity to optimize positioning session configurations in advance, maintaining accuracy during active periods while allowing energy-saving deactivations during periods when positioning is less critical.
Solution Approach 2:
The notification mechanism allows preliminary adjustment of positioning sessions before resource deactivation, ensuring that positioning accuracy is maintained during critical periods while enabling energy saving during non-critical periods through proactive session management.
Data Source
AI summary
Aspects of the disclosure are directed to a network component (e.g., a wireless network component such as transmission reception point (TRP) or gNB, a server user equipment (UE) or anchor UE, etc.) that registers to a status change notification function associated with a set of parameters (e.g., signal synchronization block (SSB) status, beam status, etc.). One or more notifications are sent to a position estimation entity (e.g., location management function (LMF), a target UE or server UE or anchor UE, etc.) in response to a status change to one or more parameters. The position estimation entity may then take various actions based on the status change notification(s), such as modifying one or more positioning session parameters. Such aspects provide various technical advantages, such as more accurate UE position estimation, reduced position estimation latency, reduced power consumption at the UE or the network or both, and so on.