Common Measurement Window for 5G Positioning Signals
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G New Radio (NR), face challenges in optimizing the scheduling and transmission of downlink and uplink positioning reference signals (PRS) to enhance spectral efficiency and reduce latency for accurate UE positioning.
Innovation Solution
A method is introduced where both downlink and uplink PRS resources are scheduled within a common measurement and transmission window, with a duration shorter than the configured transmission periodicity, allowing for repeated transmissions across multiple slots to improve synchronization and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink and uplink PRS resources are scheduled separately with configured transmission periodicity, then transmission timing is simplified, but spectral efficiency decreases and latency increases
Solution Approach 1:
The patent combines downlink PRS resources and uplink PRS resources into a single common measurement window, allowing both directions to be scheduled together rather than separately. This merging approach improves spectral efficiency by better utilizing available time-frequency resources while reducing the latency between downlink and uplink positioning measurements.
2Loss of time
If PRS transmission uses configured transmission periodicity spanning multiple slots, then transmission timing is standardized, but latency in UE positioning increases
Solution Approach 1:
The patent segments the measurement and transmission process into a common measurement window that is shorter than the full transmission periodicity. This segmentation allows the system to complete positioning measurements more quickly by concentrating PRS transmissions in a condensed time window, thereby reducing positioning latency while maintaining adequate transmission opportunities.
3Reliability
If downlink PRS resources are repeated over multiple consecutive slots, then transmission reliability is improved, but time duration for positioning increases
Solution Approach 1:
The patent merges downlink PRS repetitions and uplink PRS transmissions into a common measurement window. By combining these operations that were previously separated in time, the system achieves reliable positioning measurements within a shorter overall duration, reducing the time required for complete positioning while maintaining transmission reliability through the concentrated resource allocation.
Data Source
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AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment engaged in a positioning session with a plurality of transmission-reception points receives a downlink positioning reference signal configuration specifying one or more DL-PRS resource sets of a DL-PRS instance, wherein all DL-PRS resources of the one or more DL-PRS resource sets of the DL-PRS instance are scheduled within a time window, and receives an uplink PRS (UL-PRS) configuration specifying one or more UL-PRS resource sets, wherein all of the one or more UL-PRS resources are scheduled within the time window. The UE may perform, during the time window, measurements of DL-PRS transmissions on one or more DL-PRS resources of the one or more DL-PRS resource sets, and transmit, during the time window, at least one UL-PRS on the one or more UL-PRS resources.