Dynamic DL PRS Configuration for Wireless Positioning
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Solution Overview
Problem
Current communication systems face challenges in achieving a balance between resource overhead and positioning performance in wireless communication, particularly in non-coherent joint transmission scenarios with ideal or non-ideal backhaul links.
Innovation Solution
The proposed solution involves configuring user equipment (UE) and base stations to dynamically manage downlink positioning reference signals (PRS) by adjusting transmission periodicity, bandwidth, and resource allocation, allowing for on-demand PRS transmission based on specific configuration parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of DL PRS resources are configured with short transmission periodicity and large bandwidth to support high positioning accuracy and low latency, then positioning performance is improved, but resource overhead increases and system throughput is impaired
Solution Approach 1:
The patent applies dynamics by enabling the DL PRS transmission configuration to change from static to dynamic. The network can adjust transmission periodicity, bandwidth, and resource allocation based on real-time positioning requirements, UE mobility state, and channel conditions. This allows the system to optimize positioning performance while controlling resource overhead by adapting PRS configurations dynamically rather than using fixed large-scale configurations
Solution Approach 2:
The patent implements parameter changes by allowing dynamic modification of key DL PRS parameters including transmission periodicity, bandwidth allocation, and resource element patterns. The network can adjust these parameters based on positioning accuracy requirements and channel conditions, enabling the system to achieve high positioning performance when needed while reducing resource overhead during normal operation through parameter optimization
2Loss of time
If DL PRS transmission is configured with short periodicity and large bandwidth to reduce latency and improve positioning accuracy, then positioning performance is improved, but system throughput is impaired due to large resource overhead
Solution Approach 1:
The patent applies dynamics by enabling the DL PRS transmission configuration to change from static to dynamic. The network can adjust transmission periodicity, bandwidth, and resource allocation based on real-time positioning requirements, UE mobility state, and channel conditions. This allows the system to optimize positioning performance while controlling resource overhead by adapting PRS configurations dynamically rather than using fixed large-scale configurations
Solution Approach 2:
The patent implements periodic action by configuring DL PRS transmissions with adjustable periodicity that can be optimized based on positioning requirements. Instead of continuous or fixed frequent transmissions, the system uses periodic PRS transmissions with dynamically adjustable intervals, allowing the network to reduce overall resource overhead while maintaining positioning accuracy by transmitting PRS only when needed at optimized intervals
3Adaptability or versatility
If the number of DL PRS resources is increased to cover all potential UEs requiring positioning service, then positioning coverage is improved, but resource overhead increases
Solution Approach 1:
The patent applies local quality by enabling different DL PRS configurations to be assigned to different UEs or UE groups based on their specific positioning requirements, mobility states, and channel conditions. Instead of using a uniform large-scale configuration for all UEs, the network can apply localized optimized PRS resources to individual UEs or groups, achieving comprehensive coverage while minimizing total resource overhead through differentiated resource allocation
Solution Approach 2:
The patent implements segmentation by dividing the DL PRS resources into multiple groups or layers that can be selectively activated. The network can segment PRS resources by UE mobility state, positioning accuracy requirements, or geographic location, and activate only the necessary segments for current positioning needs. This allows the system to maintain coverage for all potential UEs while reducing instantaneous resource overhead by activating only required resource segments
Data Source
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AI summary
An apparatus and a method of wireless communication are provided. The method by a user equipment (UE) includes being configured, by a base station, with a configuration of one or more downlink (DL) positioning reference signal (PRS) resource sets, wherein the configuration of one or more DL PRS resource sets can be transmitted by the base station upon a request of the UE, and each DL PRS resource set comprises one or more DL PRS resources and for each DL PRS resource set or each DL PRS resource, being provided with at least one of configuration parameters. This can solve issues in the prior art, reach a good balance between a resource overhead and a good positioning performance in a system deployment, improve uplink reliability, provide a good communication performance, and/or provide high reliability.