Sidelink Positioning via PRS Configuration and Direct Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink communication, particularly in scenarios requiring precise positioning and low latency, such as vehicle-to-everything (V2X) communications.
Innovation Solution
The proposed method involves a first device obtaining information related to a positioning reference signal (PRS) configuration and transmitting a direct communication request (DCR) message for sidelink (SL) positioning. This allows for the establishment of direct communication links between user equipment (UEs) without the intervention of a base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base station intervention is used for positioning and communication management, then positioning accuracy and communication reliability are improved, but system latency and base station overhead increase
Solution Approach 1:
The patent extracts the positioning and direct communication functions from the base station control path, enabling UEs to perform sidelink positioning and direct communication autonomously. The UE obtains PRS configuration information and performs positioning measurements directly with other UEs without base station intervention, thereby reducing latency while maintaining reliability through pre-configured parameters and protocols.
Solution Approach 2:
The patent enables UEs to self-configure and self-manage sidelink positioning operations. The receiving UE autonomously performs PRS measurements, calculates positioning information, and communicates with transmitting UEs using pre-configured parameters. This self-service mechanism eliminates dependency on base station processing, reducing system latency while maintaining communication reliability.
2Productivity
If direct sidelink communication is established between UEs, then base station overhead is reduced and latency is decreased, but positioning precision and communication management capability may be worsened
Solution Approach 1:
The patent applies preliminary action by pre-configuring PRS parameters (resource allocation, sequence IDs, time-frequency structures) before sidelink positioning operations. The receiving UE uses these pre-configured parameters to accurately measure and process PRS signals from transmitting UEs, ensuring positioning precision is maintained even without base station intervention during the actual positioning process.
Solution Approach 2:
The patent uses PRS configuration information as an intermediary that carries positioning parameters between the network and UEs. This configuration information includes detailed parameters for PRS resource allocation, sequence generation, and measurement procedures, enabling UEs to perform precise positioning measurements autonomously while maintaining standardized measurement accuracy.
3Measurement precision
If comprehensive PRS configuration information is transmitted for accurate positioning, then positioning precision is improved, but message overhead and processing complexity increase
Solution Approach 1:
The patent applies universality by designing a comprehensive PRS configuration information structure that serves multiple functions simultaneously. The DCR and DCA messages carry not only positioning-specific parameters but also general sidelink communication configuration, resource allocation, and measurement procedures. This multi-functional approach consolidates processing requirements while maintaining comprehensive positioning precision.
Data Source
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AI summary
Proposed are a method by which a first device performs wireless communication and an apparatus 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 include at least one of information regarding an ID of a PRS resource, information regarding an ID of a PRS sequence, information regarding a start slot of the PRS resource, and information regarding a start symbol of the PRS resource. For example, the first device may transmit a DCR message including information related to a service relating to SL positioning. For example, the first device may receive a DCA message related to the DCR message.