Sidelink PRS Resource Reservation for Autonomous Multi-Transmission
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Solution Overview
Problem
There is no consensus on how to send multiple sidelink positioning reference signals (SL PRSs) in an autonomous resource selection mode, which affects the communication performance of sidelink positioning services.
Innovation Solution
A method and apparatus for determining an SL PRS resource reservation period and sending resource groups to send multiple SL PRSs in an autonomous resource allocation mode, utilizing configuration information from dedicated or shared resource pools, and implementing resource reselection based on counters to enhance transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices send multiple SL PRSs in autonomous resource selection mode, then the communication performance of SL positioning service is improved, but there is no consensus on how to send multiple SL PRSs which leads to resource allocation uncertainty
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the resource reservation period for SL PRS transmission. The terminal device determines an SL PRS resource reservation period and uses it to select resources at regular intervals, allowing flexible control over transmission frequency and resource allocation without requiring complex centralized coordination mechanisms.
2Measurement precision
If terminal devices send multiple SL PRSs at regular intervals, then positioning accuracy is improved, but resource reservation and reselection complexity increases
Solution Approach 1:
The patent implements periodic action by sending SL PRS at regular intervals determined by the resource reservation period. This periodic transmission pattern improves positioning accuracy through multiple measurements while simplifying resource management through systematic, rule-based resource selection at each interval, avoiding complex ad-hoc resource allocation.
Solution Approach 2:
The patent applies preliminary action by pre-determining the resource reservation period and establishing resource groups in advance. This allows the terminal device to prepare transmission resources beforehand, reducing real-time decision complexity while ensuring accurate and timely SL PRS transmission for positioning measurements.
3Adaptability or versatility
If configuration information from dedicated or shared resource pools is used, then resource allocation flexibility is improved, but the complexity of managing multiple resource pools increases
Solution Approach 1:
The patent applies universality by using a unified resource pool management mechanism that can serve both dedicated SL PRS transmission and shared data transmission. The terminal device determines resource reservation periods and selects resources from configured pools using consistent procedures, allowing the same resource allocation framework to handle multiple functions without increasing complexity.
Data Source
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AI summary
Disclosed in the embodiments of the present disclosure are a method and apparatus for sending a sidelink positioning reference signal (SL PRS), which method and apparatus can be applied to a communication system. The method comprises: in an autonomous resource allocation mode, determining an SL PRS resource reservation period for sending a plurality of SL PRSs; determining an SL PRS sending resource group, wherein the SL PRS sending resource group comprises a plurality of SL PRS sending resources arranged at intervals by the SL PRS resource reservation period; and sending the plurality of SL PRSs by means of the SL PRS sending resource group. By means of the solution of the present disclosure, a terminal device can perform multi-SL PRS sending in an autonomous resource selection mode, such that the functionality of SL PRS transmission is enhanced, thereby improving the communication performance of an SL positioning service.