Coordinated Sidelink Resource Pool Reservation for Positioning

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Solution Overview

Problem

Current sidelink resource pool reservation methods in wireless communication systems lack coordination, leading to interference between relay UEs and remote UEs when assigning resource pools for positioning, as there is no mechanism to proactively avoid conflicts.

Innovation Solution

Implement a coordinated reservation method where UEs determine the need to reserve a resource pool from a predefined set, transmit a reservation message to other UEs, and modify transmissions to reduce interference during reserved periods, using broadcast, groupcast, or multicast messages to manage resource usage effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If sidelink resource pools are reserved independently by each UE without coordination, then resource allocation flexibility is improved, but interference between relay UEs and remote UEs increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidinterference between relay UEs and remote UEs

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where UEs transmit reservation messages indicating their intended use of sidelink resource pools for positioning. Other UEs receive these messages and adjust their resource selection accordingly, creating a coordinated allocation system that prevents interference while maintaining flexibility

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The reservation message acts as an intermediary signal between UEs, conveying information about resource pool reservations. This intermediary mechanism enables indirect coordination without requiring direct negotiation or centralized control, allowing UEs to adapt their resource usage based on received reservation information

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If a reservation message mechanism is implemented for coordinated resource pool reservation, then interference between UEs is reduced, but signaling overhead increases

Engineering Contradiction:

Improveinterference between relay UEs and remote UEsVSAvoidsignaling overhead

Core Design Contradiction:

Object-affected harmful factorsVSLoss of information

Solution Approach 1:

The reservation message mechanism is designed to serve multiple purposes: indicating resource pool reservations, preventing interference, and enabling coordinated positioning operations. By consolidating these functions into a single message type, the patent reduces overall signaling overhead compared to implementing separate mechanisms for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20240137180A1Coordinated reservation of sidelink resource pools for positioning

Publication Date: 2024.04.25 QUALCOMM INC

AI summary

Disclosed are techniques for wireless communication. In an aspect, a first user equipment (UE) may determine that a resource pool for positioning (RPP) from a predefined plurality of RPPs should be reserved, and transmit, to at least one other UE, a reservation message indicating reservation of a RPP from the predefined plurality of RPPs. The RPP may be reserved for use by the first UE or, if the first UE is a relay UE, for use by a remote UE served by the relay UE. The reservation message may be broadcast, groupcast, multicast, etc. In response to receiving the reservation message indicating reservation of a RPP from a predefined plurality of RPPs, the at least on other UE may modify an intended transmission to reduce interference during the reserved RPP.