Initial Beam-Pairing Reference Signal Resource Coordination

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Solution Overview

Problem

In wireless communication systems, the ambiguity regarding the resource for an Initial Beam-Pairing (IBP) reference signal (RS) leads to potential failures in selecting a suitable beam-pair, causing impediments in beamforming for sidelink communications. Additionally, there is a risk of the IBP RS colliding with other channels or resources, resulting in performance degradation.

Innovation Solution

The use of an IBP-RS resource from a sidelink resource pool that identifies specific IBP-RS resources, reducing collisions with other channels. This resource pool is configured to ensure that IBP-RS resources do not overlap with other channels or resources, and it allows for down-selection of candidate IBP-RS resources, facilitating blind detection by the receiving UE.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If IBP RS is transmitted on shared resources, then resource utilization is improved, but collision with other channels increases

Engineering Contradiction:

Improveresource utilizationVSAvoidcollision avoidance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The resource pool is segmented into specific IBP-RS resources that are dedicated for initial beam-pairing reference signal transmission. This segmentation separates IBP-RS resources from other channel resources, ensuring that IBP-RS transmissions do not collide with other channels while maintaining efficient resource utilization through structured allocation.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If blind detection is performed over all possible resources, then detection completeness is improved, but delay and overhead increase

Engineering Contradiction:

Improvedetection completenessVSAvoidblind detection delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The receiving UE is pre-configured with information about specific IBP-RS resources through higher layer signaling. This preliminary action allows the UE to know in advance which resources to monitor for IBP-RS transmissions, eliminating the need for exhaustive blind detection across all possible resources and significantly reducing detection delay and overhead.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If resource pool is configured with specific IBP-RS resources, then collision with other channels is reduced, but resource allocation complexity increases

Engineering Contradiction:

Improvecollision avoidanceVSAvoidresource allocation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Higher layer signaling acts as an intermediary to convey information about specific IBP-RS resources from the network to the UE. This intermediary mechanism simplifies the resource allocation process by providing pre-configured resource information, reducing the complexity of resource management while ensuring reliable collision avoidance through dedicated resource allocation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250048348A1Reference signal for initial beam-pairing with resource coordination among user equipments

Publication Date: 2025.02.06 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit a reference signal (RS) for initial beam-pairing (IBP) on an IBP-RS resource specific to transmission of the RS for IBP. The UE may receive, from a second UE, a beam-pairing response associated with the RS for IBP. Numerous other aspects are described.