Sidelink Positioning Protocol for Multi-UE Location Exchange
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Solution Overview
Problem
Existing wireless communication systems lack effective methods for sidelink positioning of user equipments (UEs), particularly in applications like Vehicle-to-everything (V2X) communication and Public Safety first responder scenarios, where traditional UE-based and UE-assisted positioning are less useful.
Innovation Solution
Implementing a sidelink positioning protocol (SLPP) for exchanging messages between UEs to determine location results, including range, direction, location, velocity, and relative location, with group management and network support for sidelink positioning messages through LPP and SUPL.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional UE-based positioning is used, then positioning can be performed with existing infrastructure, but positioning accuracy and reliability deteriorate in V2X and Public Safety scenarios
Solution Approach 1:
The patent introduces sidelink positioning messages as an intermediary mechanism that enables direct positioning communication between UEs. These messages carry positioning capabilities, resources, and measurements, allowing UEs to determine each other's locations without relying on traditional network infrastructure, thus improving reliability in scenarios where traditional positioning fails.
Solution Approach 2:
The positioning functionality is segmented into separate message types and protocols (SLPP) that operate independently from traditional positioning procedures. This segmentation allows the system to implement specialized positioning methods for V2X and Public Safety applications while maintaining compatibility with existing positioning infrastructure.
2Measurement precision
If sidelink positioning protocol messages are exchanged between all UEs, then positioning accuracy improves, but signaling overhead and complexity increase
Solution Approach 1:
The patent implements preliminary action by having UEs exchange positioning capability information before actual positioning measurements. This allows the system to pre-determine which UEs are suitable for positioning, what resources are available, and what measurement types can be performed, thereby reducing the complexity of subsequent positioning signaling while maintaining accuracy.
Solution Approach 2:
The system implements partial action by allowing selective positioning among subsets of UEs rather than requiring all UEs to participate in positioning exchanges. Group management procedures enable the network to configure specific groups for positioning, reducing overall signaling complexity while maintaining positioning accuracy for targeted applications.
3Productivity
If group management procedures are implemented, then positioning efficiency in multi-UE scenarios improves, but control signaling overhead increases
Solution Approach 1:
The patent merges group management functions with positioning procedures by integrating group formation, maintenance, and dissolution control into the positioning message exchange framework. This consolidation allows the system to manage multiple UEs efficiently through centralized group control while reusing existing positioning signaling resources, thereby improving efficiency without proportionally increasing signaling overhead.
Data Source
AI summary
Sidelink positioning of user equipments (UEs) is supported by exchanging sidelink positioning messages between the UEs, where the messages may include sidelink positioning capabilities, sidelink positioning resources, sidelink Positioning Reference Signal (PRS) configurations, sidelink measurements and/or location results for one or more of the UEs, and may be used for determining the location results. Location results may include ranges, directions, locations, velocities, relative locations and relative velocities. Groups of UEs may be formed for sidelink positioning based on group criteria parameters that are used for determining UE inclusion or exclusion in a group, in a centralized or distributed group management procedure. Group management may additionally remove and add UEs and transfer UEs between groups. Network supported sidelink positioning may transfer sidelink positioning messages between a UE and a location server where a sidelink positioning message may be embedded in an LPP and/or SUPL message.