VDC Resource Request Method for Low Latency Vehicle Communication

Solution Overview

Problem

In the Internet of Vehicles, the transmission delay of vehicle safety messages via cellular networks like 3G or 4G is excessive, often exceeding 100 milliseconds, which can lead to delayed delivery of critical information, potentially causing traffic accidents due to the complexity of link establishment in wide-area networks.

Innovation Solution

A Vehicle Direct Communication (VDC) resource request method where user equipment sends a VDC resource request message to a base station, including travel information and resource status, to allocate a direct communication resource, allowing for efficient transmission of vehicle service information without a complex link establishment process, using a predetermined access preamble sequence and uplink grant value.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If cellular network (3G/4G) is used for vehicle service information transmission, then network coverage is wide, but transmission delay is excessive (greater than 100 milliseconds)

Engineering Contradiction:

Improvenetwork coverage areaVSAvoidtransmission delay

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

The patent segments the communication process into two parts: resource allocation through base station (using cellular infrastructure for coverage) and actual data transmission through direct vehicle-to-vehicle communication (bypassing the cellular network for speed). This segmentation allows the system to enjoy wide coverage where needed while achieving low latency where critical.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base station performs preliminary resource allocation by assigning dedicated radio resources (time-frequency slots) to vehicles before they need to communicate. This preliminary action eliminates the need for complex link establishment at the moment of communication, reducing transmission delay while maintaining the ability to leverage cellular infrastructure for resource management.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If cellular network link establishment process is used, then network management is standardized, but transmission delay increases due to complex procedures

Engineering Contradiction:

Improvelink establishment processVSAvoidtransmission delay

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The base station performs preliminary resource allocation by assigning dedicated radio resources (time-frequency slots) to vehicles before they need to communicate. This preliminary action eliminates the need for complex link establishment at the moment of communication, reducing transmission delay while maintaining the ability to leverage cellular infrastructure for resource management.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The base station acts as an intermediary that performs only the essential resource allocation function, without being involved in the actual data transmission. This mediator approach allows vehicles to communicate directly with each other using pre-allocated resources, bypassing the complex cellular link establishment procedures while still benefiting from standardized resource management.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of time

If direct communication resource is allocated, then transmission delay is reduced below 100 milliseconds, but resource allocation complexity increases

Engineering Contradiction:

Improvetransmission delayVSAvoidresource allocation process

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The base station acts as an intermediary that performs only the essential resource allocation function, without being involved in the actual data transmission. This mediator approach allows vehicles to communicate directly with each other using pre-allocated resources, bypassing the complex cellular link establishment procedures while still benefiting from standardized resource management.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Vehicles use the pre-allocated radio resources to communicate directly with each other without needing to establish cellular network connections or go through complex signaling procedures. This self-service approach enables vehicles to autonomously transmit safety-critical information using the resources previously assigned by the base station, achieving low latency communication.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3182780B1VDC resource request method, user equipment, base station, and computer-readable storage medium

Publication Date: 2019.10.09 HUAWEI TECH CO LTD

Figure 1~2
Figure 3
Figure 4

AI summary

The present invention discloses a VDC resource request method, user equipment, and a base station, where the VDC resource request method includes: sending, by user equipment, a VDC resource request message to a base station when the user equipment needs to request a VDC resource for sending vehicle service information, where the VDC resource request message includes at least one piece of the following information: a VDC resource status list, or travel information of the user equipment, and an available VDC resource is indicated in the VDC resource status list; receiving a VDC resource allocation indication message from the base station; and sending the vehicle service information by using the VDC resource indicated by the VDC resource allocation indication message. A vehicle service information transmission delay can be effectively reduced by using technical solutions provided in the present invention.