SL-PRS AGC Training Symbol Layout for Accurate Sidelink Positioning
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in accurately positioning vehicles and pedestrians due to inefficiencies in handling automatic gain control (AGC) for sidelink positioning reference signals (SL-PRS), which affect the quality of wireless signals and hinder precise location determination.
Innovation Solution
The implementation of automatic gain control (AGC) training symbols and subcarriers for sidelink positioning reference signals (SL-PRS) resources, configured with specific comb sizes and symbol numbers, to enhance signal reception and transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AGC training symbols are configured for SL-PRS resources, then signal reception quality is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by configuring AGC training symbols at the beginning of SL-PRS resources before actual positioning signals are transmitted. This allows the receiving device to pre-adjust its gain settings based on the training symbols, ensuring optimal signal reception quality for subsequent positioning measurements without requiring complex real-time adjustments.
Solution Approach 2:
The patent segments the SL-PRS resource structure by separating AGC training symbols from positioning reference symbols in the time domain. This segmentation allows the receiving device to process AGC adjustment separately from positioning measurement, simplifying the overall device complexity while maintaining signal reception quality.
2Measurement precision
If comb size and symbol numbers are configured for SL-PRS resources, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by configuring specific comb sizes and symbol numbers for different SL-PRS resources based on local positioning requirements. This allows the system to optimize positioning precision for specific scenarios without requiring complex configuration across all resources, as each resource can be tailored to its specific needs.
Solution Approach 2:
The patent utilizes parameter changes by allowing dynamic configuration of comb size and symbol number parameters for SL-PRS resources. This enables the system to adjust positioning precision by modifying these parameters without fundamentally changing the device architecture, thereby improving positioning precision while controlling device complexity.
3Reliability
If AGC reference signals are transmitted on specific subcarriers, then signal transmission quality is improved, but loss of time occurs
Solution Approach 1:
The patent applies periodic action by transmitting AGC reference signals on specific subcarriers at regular intervals within the SL-PRS resource structure. This periodic transmission ensures consistent signal transmission quality for positioning measurements while minimizing time loss by integrating the reference signals into the existing periodic SL-PRS transmission framework rather than adding separate transmission events.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits or receives a first automatic gain control (AGC) reference signal on one or more first subcarriers of an AGC training symbol of a slot, wherein a position of the one or more first subcarriers is mapped to a first set of symbols of the slot configured for a first sidelink positioning reference signal (SL-PRS) resource, and transmits or receives the first SL-PRS resource on the first set of symbols of the slot.