Sidelink Coordination Group Positioning Handover
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in efficient positioning handovers for user equipment (UE) when transitioning between different positioning synchronization sources, especially in scenarios like vehicle-to-everything (V2X) communications, where accurate and seamless positioning is critical for applications like autonomous driving.
Innovation Solution
The method involves determining a UE's position based on a first positioning synchronization source and pre-configuring a sidelink coordination group that uses a second positioning synchronization source, allowing for seamless transition to the sidelink coordination group upon specific triggering events, such as entering a tunnel, to ensure continuous and accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE uses traditional base station signals for positioning, then positioning accuracy is maintained in normal coverage areas, but positioning service is interrupted when UE moves out of direct coverage
Solution Approach 1:
The UE pre-configures sidelink coordination group information before entering a coverage loss scenario. This includes obtaining and storing positioning reference signal configurations from potential sidelink devices in advance, so that when base station signals are lost, the UE can immediately switch to using pre-configured sidelink positioning without interruption.
Solution Approach 2:
Sidelink devices act as intermediary positioning sources when traditional base station signals are unavailable. The UE establishes positioning relationships with these intermediary devices through sidelink communications, enabling continuous positioning in areas where direct base station coverage is lost, such as tunnels or indoor environments.
2Reliability
If the UE switches positioning synchronization source dynamically, then positioning service continuity is improved, but positioning accuracy and reliability during transition may deteriorate
Solution Approach 1:
The UE performs measurements and evaluations of potential sidelink positioning sources in advance, before the actual handover is needed. This includes assessing signal quality, positioning accuracy capabilities, and compatibility of different sidelink devices, so that when switching is required, the UE can select from pre-evaluated options with known performance characteristics.
Solution Approach 2:
The UE continuously monitors and evaluates the quality and suitability of both current and potential positioning synchronization sources. Based on this feedback, the UE makes informed decisions about when and how to switch sources, ensuring that transitions occur only when appropriate conditions are met, thereby maintaining positioning accuracy during handovers.
3Reliability
If the UE pre-configures multiple sidelink coordination groups, then positioning availability is improved in coverage loss scenarios, but device complexity and processing overhead increase
Solution Approach 1:
The UE divides potential positioning sources into multiple segmented coordination groups, each optimized for specific scenarios or geographic areas. This segmentation allows the UE to manage complexity by handling one group at a time based on current needs, rather than managing all possible positioning sources simultaneously. Each group can be independently configured, evaluated, and activated.
Solution Approach 2:
The UE configures multiple sidelink coordination groups in advance, preparing more positioning options than may be immediately needed. This excessive preparation ensures that appropriate positioning sources are available when required, while the UE can selectively activate only the necessary groups based on current conditions, balancing preparedness with resource management.
Data Source
AI summary
A method of wireless communication performed by a user equipment (UE) is disclosed and includes determining a position of the UE based on a first positioning synchronization source; pre-configuring a first sidelink coordination group for use by the UE prior to an occurrence of one or more first triggering events, wherein the first sidelink coordination group uses a second positioning synchronization source that is different than the first positioning synchronization source; and in response to a determination that the one or more first triggering events has occurred, transitioning to use of the first sidelink coordination group for determining the position of the UE.