Sidelink Data Link Mapping for V2X Signaling Overhead

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Solution Overview

Problem

In wireless communication systems, establishing independent PC5 RRC connections for each service or destination ID between user equipment (UE) leads to signaling overhead and increased complexity, particularly in sidelink communication scenarios like V2X, where multiple sidelink data paths are required.

Innovation Solution

A method is proposed where multiple sidelink data paths are mapped to a single sidelink data link, allowing for efficient transmission and reception of services based on Quality of Service (QoS) requirements, and determining whether to enable sidelink hybrid automatic repeat request (SL HARQ) feedback, thereby reducing signaling overhead and complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If independent PC5 RRC connections are established for each service or destination ID, then service management and routing become more precise, but signaling overhead and system complexity increase

Engineering Contradiction:

Improveservice management precisionVSAvoidconnection management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple data paths (corresponding to different services or destination IDs) into a single PC5 RRC connection. This allows multiple sidelink data paths to be managed through one connection rather than requiring separate connections for each service, thereby reducing signaling overhead and connection management complexity while maintaining the ability to distinguish and manage different data paths through path identification mechanisms

Inventive Principle:

Principle #5Merging (Combining)

2Loss of information

If multiple independent connections are established for multiple data paths, then data routing precision improves, but signaling overhead increases

Engineering Contradiction:

Improverouting accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The patent merges multiple data paths into a single connection framework, reducing the number of signaling messages required for connection management. Different data paths are distinguished through path identification information within the shared connection, maintaining routing accuracy while minimizing signaling overhead

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single PC5 RRC connection is designed to serve multiple functions by supporting multiple data paths simultaneously. The connection structure incorporates mechanisms to handle different services and destination IDs within the same connection framework, making the connection universal rather than service-specific

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11824660B2Method and apparatus for performing sidelink communication based on data link in NR V2X

Publication Date: 2023.11.21 LG ELECTRONICS INC

AI summary

Provided herein are a method for performing wireless communication by a first apparatus and an apparatus for supporting the same. The method may include the steps of receiving a service from a second apparatus, through a data link including multiple data paths, and determining whether or not to transmit a sidelink hybrid automatic repeat request (SL HARQ) feedback being related to the service to the second apparatus. Herein, based on Quality of Service (QoS) requirements of a service being transmitted through the multiple data paths, the data link may include the multiple data paths.