V2X Platform Uu–PC5 Switching for RSU Service Continuity

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Solution Overview

Problem

C-V2X service quality is compromised when road side units (RSUs) fail to operate normally or are absent, preventing on-board units (OBUs) from accurately and timely acquiring vehicle-to-everything (V2X) information.

Innovation Solution

A communication method utilizing a long-distance (Uu) and short-distance (PC5) interface to determine the operating state of RSUs, enabling OBUs to connect with target units via the Uu interface for V2X information delivery when RSUs are abnormal or absent, ensuring robustness and real-time performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If C-V2X communication relies on road side units (RSUs) for V2X information transmission, then communication coverage and service quality are improved, but system reliability deteriorates when RSUs are abnormal or absent

Engineering Contradiction:

ImproveC-V2X service qualityVSAvoidRSU operating state dependency

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent introduces a communication method where the OBU acts as an intermediary to detect RSU status and switch communication paths. When RSU is abnormal, the OBU uses the long-distance communication interface to obtain V2X information from the network, effectively mediating between the failed infrastructure and the vehicle's communication needs.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent implements dynamic switching between communication interfaces based on RSU operating state. The system transitions from relying solely on short-distance PC5 interface to using the long-distance Uu interface when RSU becomes abnormal, making the communication system adaptive to infrastructure availability.

Inventive Principle:

Principle #15Dynamics

2Speed

If OBUs use short-distance communication interface to acquire V2X information from RSU, then information acquisition speed is improved, but service continuity deteriorates when RSU is unavailable

Engineering Contradiction:

ImproveV2X information acquisition speedVSAvoidService continuity

Core Design Contradiction:

SpeedVSDuration of action of stationary object

Solution Approach 1:

The patent applies preliminary action by having the OBU detect RSU operating state in advance and prepare alternative communication paths. The OBU continuously monitors RSU status and pre-establishes the capability to switch to long-distance communication interface, ensuring service continuity before RSU failure affects information acquisition.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent ensures continuity of useful action by maintaining both short-distance and long-distance communication capabilities simultaneously. The system continuously acquires V2X information through the preferred short-distance interface while keeping the long-distance interface ready, ensuring uninterrupted service even when RSU becomes unavailable.

Inventive Principle:

Principle #20Continuity of useful action

3Duration of action of stationary object

If the system switches to long-distance communication interface when RSU is abnormal, then service continuity is improved, but communication latency increases

Engineering Contradiction:

ImproveService continuityVSAvoidCommunication latency

Core Design Contradiction:

Duration of action of stationary objectVSLoss of time

Solution Approach 1:

The patent implements feedback mechanisms where the OBU continuously monitors RSU operating state and provides feedback to the communication controller. This feedback loop enables real-time detection of RSU abnormalities and automatic switching to alternative communication paths, minimizing latency by acting immediately when service disruption is detected.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12375564B2Communication method, vehicle-to-everything platform, on-board unit and storage medium

Publication Date: 2025.07.29 ZTE CORP

AI summary

The embodiments of the present application relate to the technical field of vehicle-to-everything. Disclosed are a communication method, a vehicle-to-everything platform, an on-board unit and a storage medium. In the present application, the communication method is applied to a vehicle-to-everything platform, and the method comprises: determining an operating state of a road side unit (RSU) by means of a long-distance communication interface which faces the RSU; when it is detected that the operating state of the RSU is abnormal, determining a target on-board unit (OBU) according to a position of the RSU and a position of the OBU reported by the long-distance communication interface which faces the OBU, wherein the OBU establishes a communication connection with the RSU by means of a short-distance communication interface; and issuing vehicle-to-everything (V2X) information to the target OBU by means of the long-distance communication interface which faces the target OBU.