Source Layer 2 Identifier for Relay Path Switching

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently providing source Layer 2 identifiers for path switching, particularly in scenarios involving relay UEs, which can lead to suboptimal communication paths and increased processing and signaling resources.

Innovation Solution

The method involves generating and transmitting measurement reports that include serving relay UE source Layer 2 identifiers and candidate relay UE identifiers by remote UEs, allowing network entities to switch UEs between indirect and direct paths based on these identifiers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If path switching is performed without efficient source Layer 2 identifier provision, then path switching capability is maintained, but processing and signaling resources are increased

Engineering Contradiction:

Improvepath switching efficiencyVSAvoidprocessing and signaling resources

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The remote UE proactively generates measurement reports containing source L2 identifiers of serving and candidate relay UEs before path switching is needed. This preliminary preparation allows the network entity to quickly execute path switching without performing complex identifier resolution at the moment of switching, thereby reducing processing resources and signaling overhead during the actual path transition.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If relay UE path switching is implemented, then communication path flexibility is improved, but identifier management complexity increases

Engineering Contradiction:

Improvecommunication path flexibilityVSAvoididentifier management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts the source L2 identifier information from the complex relay path management process and places it directly into measurement reports generated by the remote UE. By taking out this critical identifier information and making it explicitly available in the measurement report, the system simplifies the identifier management complexity while maintaining communication path flexibility for relay UE switching.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If measurement reports include detailed relay UE identifiers, then path switching accuracy is improved, but signaling overhead increases

Engineering Contradiction:

Improvepath switching accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

Instead of transmitting complex relay path configuration details or multiple identifier formats, the patent uses a simplified copy of the source L2 identifier (the Layer 2 ID of the relay UE) within the measurement report. This copied identifier provides sufficient information for accurate path switching while minimizing signaling overhead, as it reuses an existing identifier format already present in the system.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250048156A1Source layer 2 identifier for path switching

Publication Date: 2025.02.06 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a remote user equipment (UE) may generate a measurement report for discovery that includes a serving relay UE source Layer 2 (L2) identifier (ID), of a serving relay UE that serves the remote UE, and a candidate relay UE source L2 ID, for each candidate relay UE of a set of candidate relay UEs. The UE may transmit the measurement report. Numerous other aspects are described.