Dynamic PRS Resource Configuration for Wireless Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining positioning information when network entities change operating modes or use different transmission parameters for positioning reference signals (PRS).
Innovation Solution
The system dynamically configures PRS resources by allowing user equipment (UE) to receive indications of PRS resource set configurations associated with different operating modes of the network entity. The UE selects an appropriate PRS resource set based on the current operating mode and expiration timers, and requests on-demand PRS transmissions through the selected resource set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the network entity transmits PRS using different settings for different operating modes, then power management efficiency is improved, but positioning measurement accuracy deteriorates
Solution Approach 1:
The patent segments PRS resources into multiple resource sets, where each resource set is configured for specific operating modes. The network entity indicates which resource sets are available for different operating modes, allowing the UE to select the appropriate resource set based on the current operating mode. This segmentation enables differentiated PRS transmission settings for different power management scenarios while maintaining measurement accuracy through proper resource selection.
Solution Approach 2:
The patent implements dynamic configuration where the network entity can indicate available PRS resource sets dynamically based on current operating mode. The UE selects PRS resources dynamically according to the indicated resource sets and expiration timers. This dynamic approach allows the system to adapt PRS transmission settings to current power management requirements while ensuring accurate positioning measurements through mode-appropriate resource selection.
2Measurement precision
If the network entity uses fixed PRS transmission settings, then positioning measurement accuracy is maintained, but power management flexibility deteriorates
Solution Approach 1:
The patent enables dynamic adaptation of PRS transmission settings through multiple configured resource sets with different parameters. The network entity indicates which resource sets are available for different operating modes, allowing the system to maintain measurement accuracy by selecting appropriate resources for each mode while gaining power management flexibility through mode-specific configurations.
Solution Approach 2:
The patent changes PRS transmission parameters (such as periodicity, resource allocation, timing) based on operating mode. Different PRS resource sets are configured with different parameters optimized for specific modes. The network entity indicates which resource sets are available, enabling parameter changes that maintain measurement accuracy while adapting to power management requirements of different operating modes.
3Measurement precision
If the UE monitors multiple PRS resource sets continuously, then positioning accuracy is maintained across mode changes, but device complexity and processing load increase
Solution Approach 1:
The network entity provides preliminary indication of available PRS resource sets for different operating modes before mode changes occur. The UE receives and stores this information along with expiration timers. When operating mode changes, the UE can quickly determine the appropriate resource set based on pre-provided information, maintaining positioning accuracy while avoiding the complexity of continuous monitoring of all resource sets.
Solution Approach 2:
The patent implements a mechanism where the UE autonomously selects the appropriate PRS resource set based on the network entity's indication and current operating mode. The UE uses the provided resource set information and expiration timers to make selection decisions without requiring complex coordination or continuous monitoring of all possible resource sets. This self-service approach maintains positioning accuracy while reducing processing load.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive an indication of a configuration for one or more positioning reference signal (PRS) resource sets that are each associated with one or more operating modes of a network entity. In some examples, the UE may also receive signaling that indicates a current operating mode of the network entity or an expiration timer for the one or more PRS resource sets. The UE may select a PRS resource set from the one or more PRS resource sets based on the current operating mode of the network entity, the expiration timer, or both. Accordingly, the UE may transmit a request to receive on-demand PRS transmissions via the selected PRS resource set. After transmitting the request, the UE may monitor the selected PRS resource set for the requested on-demand PRS transmissions.