V2V Communication Control via Cellular Network Data

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Solution Overview

Problem

Existing vehicle-to-vehicle (V2V) communication systems face challenges with high data load, increased collision risk, and resource distribution issues due to insufficient radio channel capacity, particularly at high transmission rates, leading to medium access delays and unfair resource allocation.

Innovation Solution

The integration of cellular network data with V2V communication devices allows for the adjustment of control parameters such as CAM transmission rates and transmission power using data from cellular network nodes, leveraging LTE and other radio technologies to optimize V2V communication by aggregating information on UE presence, mobility, and density, thereby managing radio resource usage efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high transmission rate of CAMs is used for early hazard detection, then hazard detection capability is improved, but radio channel capacity is exceeded leading to high collision risk and medium access delay

Engineering Contradiction:

Improvehazard detection capabilityVSAvoidradio channel capacity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic adjustment of CAM transmission rates based on radio channel conditions. The transmission rate is not fixed but adapts in real-time according to the number of vehicles in the area and current channel capacity, resolving the contradiction between maintaining high detection capability and avoiding channel overload.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses feedback from radio channel measurements and vehicle density information to continuously adjust CAM transmission parameters. This closed-loop control ensures that transmission rates remain optimal for hazard detection while staying within available channel capacity, preventing collisions and delays.

Inventive Principle:

Principle #23Feedback

2Reliability

If high transmission rate of CAMs is used, then hazard detection capability is improved, but medium access delay increases due to channel congestion

Engineering Contradiction:

Improvehazard detection capabilityVSAvoidmedium access delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The transmission rate is dynamically adjusted based on real-time channel conditions and vehicle density. When vehicle density is high, the rate is reduced to minimize medium access delay; when density is low, the rate is increased to improve hazard detection capability, thus resolving the time-capacity trade-off.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes transmission parameters (rate, power) based on measured channel conditions and vehicle density. This parameter adaptation allows the system to optimize the balance between detection capability and access delay by adjusting rates according to actual traffic and channel state.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If high transmission rate of CAMs is used, then hazard detection capability is improved, but resource distribution among V2V devices becomes unfair

Engineering Contradiction:

Improvehazard detection capabilityVSAvoidresource distribution fairness

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies different transmission rates to different vehicles based on their local conditions (vehicle density in their area, channel quality). This localized adaptation ensures each vehicle receives appropriate resource allocation for its specific context, achieving fairness while maintaining overall hazard detection capability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Transmission parameters are adjusted individually for each vehicle based on local vehicle density and channel conditions. This per-vehicle parameter optimization ensures fair resource distribution while collectively maintaining adequate hazard detection capability across the network.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2901724B1Cellular-network based control of vehicle-to-vehicle communication

Publication Date: 2017.07.05 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

A vehicle-to-vehicle communication device (100; 100') is provided with access to a cellular network (200, 210). The cellular network (200, 210) implements at least a first radio technology. The vehicle-to-vehicle communication device (100, 100') further supports a second radio technology for vehicle-to-vehicle communication. For controlling vehicle-to- vehicle communication by the second radio technology, data from the cellular network (200, 210) are provided to the vehicle-to-vehicle communication device (100, 100'). For example, such data may be derived from presence or mobility information available in the cellular network (200, 210). On the basis of the data from the cellular network (200, 210), the vehicle- to-vehicle communication device (100, 100') sets at least one control parameter of vehicle-to- vehicle communication by the second radio technology, e.g., a rate of sending a message or a transmission power utilized by the second radio technology.