Sidelink Positioning Session Handover Mechanism

Solution Overview

Problem

Existing positioning technologies face interruptions in sidelink positioning sessions due to resource utilization conflicts, down-prioritization of traffic, and anchor UE's inability to complete the session, leading to excessive latency and computational overhead for the target UE.

Innovation Solution

An apparatus and method for performing a soft handover of sidelink positioning sessions by transmitting a request message to second user devices, receiving response messages, selecting a suitable second user device, and configuring it to perform handovers of the sidelink positioning session from the apparatus to the selected second user device for the first user device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the anchor UE maintains the sidelink positioning session, then positioning continuity is ensured, but resource utilization conflicts and down-prioritization cause session interruptions

Engineering Contradiction:

Improvepositioning session continuityVSAvoidresource utilization flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic anchor UE selection where the target UE can hand over the positioning session from a current anchor UE to a new anchor UE based on real-time resource availability and traffic prioritization conditions. This dynamic adaptation allows the system to maintain positioning session continuity while responding to changing resource utilization conditions, resolving the contradiction between reliability and adaptability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces a handover mechanism as an intermediary process that transfers the anchoring function between different UEs. When the current anchor UE experiences resource conflicts or down-prioritization, the target UE initiates a handover to a new anchor UE, allowing the positioning session to continue without interruption. This intermediary handover process resolves the conflict between maintaining session reliability and adapting to resource constraints.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the target UE performs positioning session handover, then session continuity is maintained, but computational overhead increases

Engineering Contradiction:

Improvepositioning session continuityVSAvoidcomputational overhead

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements preliminary actions by having the target UE identify and evaluate potential new anchor UEs before the current anchor UE becomes unavailable. The target UE proactively seeks alternative anchor UEs and prepares handover configurations in advance, which reduces the computational overhead and energy consumption during actual handover execution by avoiding last-minute search and evaluation processes.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs feedback mechanisms where the target UE monitors the performance and availability of anchor UEs continuously. Based on feedback regarding resource utilization, traffic prioritization, and session stability, the target UE makes informed decisions about when to initiate handover. This feedback-driven approach optimizes the handover process by triggering it only when necessary, thereby reducing unnecessary computational overhead while maintaining session continuity.

Inventive Principle:

Principle #23Feedback

3Productivity

If the anchor UE down-prioritizes traffic, then resource conflicts are reduced, but positioning session interruptions occur

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidpositioning session continuity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements dynamic anchor UE selection where the target UE can hand over the positioning session from a current anchor UE to a new anchor UE based on real-time resource availability and traffic prioritization conditions. This dynamic adaptation allows the system to maintain positioning session continuity while responding to changing resource utilization conditions, resolving the contradiction between reliability and adaptability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces a handover mechanism as an intermediary process that transfers the anchoring function between different UEs. When the current anchor UE experiences resource conflicts or down-prioritization, the target UE initiates a handover to a new anchor UE, allowing the positioning session to continue without interruption. This intermediary handover process resolves the conflict between maintaining session reliability and adapting to resource constraints.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12309740B2Handover of sidelink positioning session

Publication Date: 2025.05.20 NOKIA TECHNOLOGIES OY

AI summary

A method including transmitting, by a third user device, to one or more second user devices, a request message for requesting a handover of a sidelink positioning session established between the third user device and a first user device; receiving, by the third user device, from the one or more second user devices, one or more response messages to the request message; selecting, by the third user device, at least one second user device of the one or more second user devices; and transmitting, by the third user device, to the at least one second user device, at least one configuration for performing one or more handovers of the sidelink positioning session from the third user device to the at least one second user device for the first user device.