Sidelink Positioning Coordination Using Device Capability Exchange
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Solution Overview
Problem
Current wireless communication systems lack coordination mechanisms for sidelink positioning among user devices, particularly in scenarios where network control is limited or absent, leading to challenges due to varying device capabilities, synchronization issues, and differing energy states.
Innovation Solution
A method for sidelink positioning coordination is introduced, where user devices exchange sidelink positioning capability information to determine a configuration for a positioning session, identifying participating nodes and a calculating node, and communicate this configuration to enable accurate position estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink positioning is performed without coordination mechanisms, then positioning can be attempted, but positioning accuracy and reliability deteriorate due to varying device capabilities and synchronization issues
Solution Approach 1:
The patent applies preliminary action by having user devices exchange capability information before the positioning session is established. The target user node receives capability information from supporting user nodes in advance, allowing it to determine an appropriate positioning configuration that accounts for device capabilities before actual positioning measurements begin. This pre-coordination ensures compatibility and synchronization without adding complex real-time coordination mechanisms.
2Reliability
If device capabilities are not considered in positioning configuration, then positioning setup is simplified, but positioning reliability deteriorates due to mismatched capabilities among devices
Solution Approach 1:
The patent applies local quality by having each user node report its specific positioning capabilities (such as ability to transmit/receive positioning reference signals, perform positioning measurements, or calculate position estimates) and having the target node configure the positioning session according to the specific capabilities of each participating device. This allows the system to optimize for each device's actual capabilities rather than using a one-size-fits-all approach, improving reliability without requiring overly complex centralized coordination.
3Measurement precision
If synchronization is not ensured among user nodes, then energy consumption is reduced, but positioning accuracy deteriorates due to timing issues
Solution Approach 1:
The patent applies preliminary action by establishing synchronization and timing configurations during the capability exchange phase before the positioning session begins. The target user node determines the positioning configuration including timing parameters based on received capability information, and communicates this configuration to supporting user nodes in advance. This allows devices to synchronize their positioning reference signal transmissions and measurements without requiring continuous energy-consuming synchronization mechanisms during the actual positioning process.
Data Source
AI summary
A method includes controlling transmitting by a target user node to be positioned to one or more other user nodes, a request; controlling receiving, by the target user node from one or more of the other user nodes, sidelink positioning capability information of the user node indicating one or more sidelink positioning capabilities of the other user node; determining, by the target user node based on the sidelink positioning capability information received from the one or more other user nodes, a sidelink positioning configuration for a sidelink positioning session to determine a position estimate of the target user node; controlling transmitting, via a sidelink channel, by the target user node to at least the one or more other user nodes that provided their sidelink positioning capability information, information indicating the sidelink positioning configuration for the sidelink positioning session; and controlling receiving a position estimate of the target user node.