Sidelink Control Information for Sessionless Positioning Feedback
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Solution Overview
Problem
Current sessionless positioning techniques in wireless communication systems lack feedback mechanisms for anchor User Equipment (UEs) to adjust their sidelink-positioning reference signal (SL-PRS) transmissions, leading to inefficient resource allocation and potential delays in positioning.
Innovation Solution
Incorporating sidelink control information (SCI) that includes an indication of sessionless positioning and SL-PRS identification information, allowing User Devices (UEs) to notify anchor UEs about their use of SL-PRSs for sessionless positioning without establishing a session-based protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sessionless positioning is performed without feedback mechanisms, then device complexity is reduced and ease of operation is improved, but resource allocation efficiency deteriorates and positioning accuracy deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where User Devices (UEs) performing sessionless positioning send sidelink control information (SCI) to anchor UEs. The SCI includes an indication that sessionless positioning is being performed and SL-PRS identification information. This feedback allows anchor UEs to adjust their SL-PRS transmission configurations based on actual positioning needs, resolving the contradiction by maintaining operational simplicity while improving resource allocation efficiency through informed transmission adjustments.
2Ease of operation
If sessionless positioning is performed without feedback mechanisms, then device complexity is reduced and ease of operation is improved, but positioning accuracy deteriorates
Solution Approach 1:
The feedback mechanism enables anchor UEs to receive SCI from UEs performing sessionless positioning, which includes SL-PRS identification information. Based on this feedback, anchor UEs can make informed decisions about modifying their SL-PRS transmission configurations, ensuring that positioning reference signals are transmitted with appropriate parameters for accurate positioning measurements, thereby improving positioning accuracy while maintaining operational simplicity.
Solution Approach 2:
The patent applies preliminary action by having anchor UEs pre-configure their SL-PRS transmission parameters based on received SCI feedback before actual positioning measurements occur. This allows the system to proactively adjust transmission configurations to optimize positioning accuracy in advance, rather than reacting after measurement errors occur.
3Reliability
If anchor UEs continuously transmit SL-PRS without feedback information, then positioning availability is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements feedback where UEs performing sessionless positioning send SCI to anchor UEs indicating their positioning needs. Anchor UEs use this feedback to adjust SL-PRS transmission configurations, transmitting signals only when and where needed. This resolves the contradiction by maintaining positioning availability through responsive transmission while improving resource allocation efficiency by eliminating unnecessary continuous transmissions.
Solution Approach 2:
The patent applies dynamics by making SL-PRS transmission configurations adjustable and adaptive based on received SCI feedback. Rather than static continuous transmission, anchor UEs dynamically modify their transmission parameters according to actual positioning demands, ensuring availability when needed while optimizing resource usage.
Data Source
AI summary
A method includes receiving, by a first user device in a wireless network that is performing sessionless positioning based on sidelink-positioning reference signal (SL-PRS), a user device identifier of a second user device in a vicinity of the first user device that is transmitting sidelink-positioning reference signal and SL-PRS identification information associated with the sidelink-positioning reference signal transmitted by the second user device; transmitting, by the first user device, sidelink control information including at least one of an indication that the first user device is performing sessionless positioning, a user device identifier of the first user device, the user device identifier of the second user device, or the SL-PRS identification information; and performing, by the first user device, at least one measurement on the sidelink-positioning reference signal transmitted by the second user device for sessionless positioning of the first user device.