PRS Configuration for RSTD-Based Wireless Positioning
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Solution Overview
Problem
The increasing demand for mobile broadband communication and V2X services requires enhanced wireless communication technologies that can handle larger capacities, reliability, and low latency, while existing systems face challenges in efficiently utilizing positioning reference signals (PRS) for precise location determination.
Innovation Solution
The implementation of methods and devices that utilize positioning reference signal (PRS) configurations, including information related to PRS resources, sequences, and time differences, to enhance wireless communication, particularly in V2X scenarios, by obtaining and transmitting relevant information to improve positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS configurations are used for positioning in wireless communication, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the PRS configuration information into multiple independent parameters including PRS resource ID, PRS sequence ID, starting slot, and starting symbol. Each parameter can be independently configured and transmitted, allowing the system to achieve precise positioning while managing complexity through modular parameter structure
Solution Approach 2:
The patent implements preliminary configuration of PRS parameters before actual positioning measurements. The gNB configures and transmits PRS configuration information to the UE in advance, including resource allocation, sequence initialization, and time-domain parameters, so that when positioning is needed, the measurements can be performed immediately without complex real-time configuration
2Reliability
If multiple PRS parameters are transmitted for accurate positioning, then positioning reliability is improved, but information overhead increases
Solution Approach 1:
The patent makes the PRS configuration information serve multiple functions: it enables precise positioning measurements, provides time synchronization reference, and establishes resource allocation rules for subsequent communications. This multi-functionality reduces the need for separate signaling for each function, thereby reducing overall information overhead while maintaining positioning reliability
Solution Approach 2:
The patent uses parameter compression and encoding techniques where certain PRS parameters are derived from others. For example, the PRS sequence is generated based on a seed value and configuration parameters rather than transmitting the full sequence. Time-domain parameters like starting slot and symbol are configured relative to existing frame structures, reducing the number of bits required to convey the information
Data Source
AI summary
Proposed are a method by which a first device performs wireless communication and a device supporting same. For example, the first device may acquire information related to a PRS configuration. For example, the information related to the PRS configuration may comprise at least one of information about an ID of a PRS resource, information about an ID of a PRS sequence, information about a starting slot of the PRS resource, or information about a start symbol of the PRS resource. For example, the first device may receive a plurality of PRSs. For example, the first device may acquire information related to an RSTD on the basis of the plurality of PRSs. For example, the first device may transmit the information related to the RSTD and information related to a plurality of entities related to the RSTD.