V2X Carrier Resource Pool CBR Cycle Synchronization

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In V2X communication systems, the delay in resource pool reconfiguration due to differing carrier and resource pool busy ratio cycles can lead to communication delays when the carrier CBR cycle is longer than the resource pool CBR cycle, causing inefficiencies in V2X communication performance.

Innovation Solution

The method involves reconfiguring the resource pool CBR cycle to be greater than or equal to the carrier CBR cycle, allowing for independent operation of counters and ignoring CBR measurement results for resource pool reselection during V2X communication, thereby preventing communication delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the resource pool CBR cycle is set shorter than the carrier CBR cycle to enable more frequent resource pool reselection, then resource pool reconfiguration flexibility is improved, but communication delay increases due to repeated reselection procedures

Engineering Contradiction:

Improveresource pool reconfiguration flexibilityVSAvoidcommunication delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies dynamics by making the resource pool CBR cycle adaptive rather than fixed. The base station dynamically adjusts the resource pool CBR cycle length based on the carrier CBR cycle length and current communication conditions. When the carrier CBR cycle is long, the resource pool CBR cycle is extended to match or exceed it, preventing unnecessary reselections. This dynamic adjustment resolves the contradiction by providing flexibility when needed while avoiding delays when the carrier cycle is long.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of the resource pool CBR cycle length based on the carrier CBR cycle length. Specifically, when the carrier CBR cycle is determined to be longer than a threshold, the resource pool CBR cycle is set to be greater than or equal to the carrier CBR cycle. This parameter change strategy allows the system to adapt the resource pool reselection frequency to match the carrier reselection frequency, thereby preventing communication delays while maintaining reconfiguration flexibility when conditions permit.

Inventive Principle:

Principle #35Parameter changes

2Loss of time

If the resource pool CBR cycle is set longer than the carrier CBR cycle to reduce reselection frequency, then communication delay is reduced, but resource pool reconfiguration responsiveness deteriorates

Engineering Contradiction:

Improvecommunication delayVSAvoidresource pool reconfiguration responsiveness

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The patent dynamically changes the resource pool CBR cycle parameter based on the carrier CBR cycle parameter. When the carrier CBR cycle is short, the resource pool CBR cycle is set accordingly to maintain responsiveness. When the carrier CBR cycle is long, the resource pool CBR cycle is extended to match or exceed it, reducing unnecessary reselections. This conditional parameter adjustment ensures both low delay and high responsiveness by adapting to different operational scenarios.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system employs dynamic adjustment of the resource pool CBR cycle length based on real-time carrier conditions. The base station monitors the carrier CBR cycle and dynamically configures the resource pool CBR cycle to optimize both responsiveness and delay performance. This dynamic behavior allows the system to maintain reliability when carrier cycles are short while reducing delays when carrier cycles are long.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If independent counter operation is implemented for carrier and resource pool reselection, then system flexibility is improved, but measurement complexity increases

Engineering Contradiction:

Improvesystem flexibilityVSAvoidmeasurement complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent extracts the CBR measurement function into separate independent counters for carrier reselection and resource pool reselection. This allows each counter to operate autonomously with its own timing and thresholds. By taking out the measurement function into separate manageable units, the system gains flexibility in configuring different measurement cycles while keeping the complexity of each individual measurement process simple and well-defined.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11877216B2Method and apparatus for selecting carrier in communication system supporting vehicle to everything communication

Publication Date: 2024.01.16 KIA CORPORATION

AI summary

An operation method of a terminal located in a vehicle supporting vehicle-to-everything (V2X) communication may include: receiving, from a base station, a first message requesting reporting of a first counter corresponding to a channel busy ratio (CBR) measurement cycle for a carrier (re)selection procedure; transmitting, by the terminal, a second message including the first counter to the base station; and receiving, from the base station, a third message including a second counter corresponding to a CBR measurement cycle for a resource pool (re)selection procedure. The second counter can be reconfigured by the base station to be greater than or equal to the first counter.