V2V Cluster Resource Allocation via Network Node Assignment

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Solution Overview

Problem

Existing vehicle-to-vehicle (V2V) communication systems face challenges in efficiently managing cellular network resources, leading to collisions and increased load, particularly when transmitting Cooperative Awareness Messages (CAMs) across clusters, which are not optimized for widespread reception and require cellular connectivity for each device.

Innovation Solution

A method where a V2V communication device manages a cluster by determining a cluster description and sending it over a cellular network to a network node, which assigns resources for V2V communication, allowing the device to assign these resources to other devices within the cluster, thereby avoiding collisions and optimizing resource usage across clusters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a contention-based system is used for V2V communication, then devices can access the radio channel independently, but collisions occur between different devices competing for the same channel

Engineering Contradiction:

ImproveIndependent channel accessVSAvoidCollision-free communication

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces a cellular network as an intermediary to manage V2V communication resources. The network node assigns specific time-frequency resources to different V2V devices, acting as a mediator that coordinates access and prevents collisions while maintaining the benefits of independent communication

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If LTE cellular network infrastructure is used to organize VANET into clusters, then collisions between VANET transmissions within a cluster are avoided, but significant load is placed on the cellular network and cellular connectivity is required for each device

Engineering Contradiction:

ImproveCollision avoidance within clusterVSAvoidCellular connectivity requirement

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by differentiating resource allocation strategies: within-cluster communications use network-assigned resources for reliability, while inter-cluster communications use autonomous contention-based access. This allows each device to operate independently without continuous cellular connectivity while maintaining collision avoidance where needed

Inventive Principle:

Principle #3Local quality

3Productivity

If centralized cluster management is implemented, then resource allocation can be optimized, but the cellular network experiences significant load and requires connectivity for each V2V device

Engineering Contradiction:

ImproveResource allocation efficiencyVSAvoidCellular network load

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent segments resource allocation into two levels: the cellular network provides macro-level resource sets to clusters, while individual devices within clusters autonomously allocate specific time-frequency resources among themselves. This segmentation reduces cellular network load while maintaining efficient resource utilization

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If all V2V devices transmit CAMs simultaneously, then widespread message reception is achieved, but collisions increase and resource utilization becomes inefficient

Engineering Contradiction:

ImproveWidespread message receptionVSAvoidResource utilization efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent implements periodic action by assigning different time slots to different devices for CAM transmissions. Devices transmit CAMs in scheduled intervals rather than simultaneously, ensuring widespread reception while avoiding collisions and optimizing resource utilization through time-division multiplexing

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP3042524B1Cluster-based resource allocation for vehicle-to-vehicle communication

Publication Date: 2018.12.26 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

A vehicle-to-vehicle (V2V) communication device (100-CH) manages a cluster comprising the V2V communication device (100-CH) and at least one of other V2V communication device (100-CM). The V2V communication device (100-CM) determines a cluster description specifying one or more characteristics of the cluster indicates the cluster description over a cellular network to a network node (200, 210). The network node (200, 210) receives the cluster description and, on the basis of the received cluster description, assigns to the cluster a set of resources for V2V communication. The network node (200, 210) sends a resource assignment over the cellular network to the V2V communication device (100-CH). The resource assignment indicates the assigned set of resources. The V2V communication device (100-CH) receives the resource assignment and assigns resources from the set of resources to the V2V communication devices (100-CH, 100-CM) of the cluster. Further, the V2V communication device (100-CH) indicates the assigned resources to the at least one further V2V communication device (100-CM) of the cluster.