Mode 2 Resource Reselection Under Packet Delay Budget Limits

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Solution Overview

Problem

There is a need for communication apparatuses and methods that provide feasible technical solutions for Mode 2 resource (re-)selection in packet delay budget (PDB)-limited scenarios, as discussed by the 3GPP, particularly when T2min>remaining PDB, which has not been adequately addressed.

Innovation Solution

A communication apparatus and method that adjust the candidate resource ratio based on a time period and identify a plurality of resource candidates, allowing a transmitter to use a selected resource for transmission blocks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the resource selection window is constrained by remaining PDB (packet delay budget), then transmission timing is ensured to meet delay requirements, but the number of available candidate resources is reduced

Engineering Contradiction:

Improvetransmission delayVSAvoidnumber of candidate resources

Core Design Contradiction:

Loss of timeVSQuantity of substance

Solution Approach 1:

The patent adjusts the candidate resource ratio parameter dynamically based on whether the scenario is PDB-limited or not. When PDB-limited (T2min > remaining PDB), the system sets a higher candidate resource ratio to compensate for the reduced time window, ensuring sufficient candidate resources are identified despite the constrained selection period.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If T2min is set higher to ensure minimum resource selection time, then resource selection accuracy is improved, but the resource selection window may exceed remaining PDB causing transmission delays

Engineering Contradiction:

Improveresource selection accuracyVSAvoidtransmission delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent makes the resource selection window dynamic by comparing T2min with remaining PDB. When T2min exceeds remaining PDB, the system adapts by adjusting the candidate resource ratio and proceeding with resource selection within the PDB constraint, rather than rigidly maintaining T2min. This dynamic adjustment allows the system to balance selection accuracy with timing requirements.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the candidate resource ratio is increased to ensure sufficient candidates are found, then resource identification success rate is improved, but the processing complexity increases

Engineering Contradiction:

Improveresource identification success rateVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the candidate resource ratio parameter based on the PDB-limited scenario detection. By setting an appropriately high ratio when PDB-constrained, the system ensures sufficient candidates are identified without requiring complex iterative adjustments, as the ratio is determined by the scenario type rather than complex real-time optimization.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12490294B2Communication apparatuses and communication methods for mode 2 resource (re-)selection for packet delay budget limited scenario

Publication Date: 2025.12.02 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

The present disclosure provides communication apparatuses and communication methods for Mode 2 resource (re-)selection for packet delay budget limited scenario. The communication apparatuses include a communication apparatus comprising: circuitry which, in operation, adjusts a candidate resource ratio based on a time period, and identifies a plurality of resource candidates based on the adjusted candidate resource ratio; and a transmitter, which, in operation, transmits a transmission block using a resource selected from the plurality of resource candidates.