User Equipment With Multiple Active Configured Grants for Sidelink

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Solution Overview

Problem

Existing technologies do not support multiple active configured grants for sidelink communication in D2D communication systems, which is necessary for diverse service requirements.

Innovation Solution

A user equipment is equipped with a reception unit to receive configuration information for multiple active grants and a transmission unit to transmit sidelink signals using the specified resources, enabling simultaneous use of multiple configured grants for sidelink communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple active configured grants are supported for sidelink communication, then service diversity and communication efficiency are improved, but system complexity and resource management difficulty increase

Engineering Contradiction:

Improveservice diversity supportVSAvoidgrant management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the grant management by introducing separate configuration information for each configured grant, with unique identifiers (CG-Index) to distinguish multiple grants. Each grant can be independently activated, deactivated, and managed, allowing the system to handle multiple services with different requirements without creating a monolithic complex management structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary configuration of grant parameters including time-frequency resources, periodicity, and transmission power settings before actual sidelink communication occurs. This pre-configuration approach allows multiple grants to be prepared in advance with different service requirements, reducing real-time decision complexity and enabling faster service deployment.

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If configured grants are used for sidelink transmission, then PDCCH monitoring requirements are reduced, but resource allocation flexibility decreases

Engineering Contradiction:

ImprovePDCCH monitoring timeVSAvoidresource allocation flexibility

Core Design Contradiction:

Loss of timeVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic management of configured grants through activation and deactivation commands received via PDCCH. While configured grants reduce continuous monitoring requirements, the system maintains flexibility by allowing base station-controlled activation/deactivation of specific grants based on changing service requirements, traffic conditions, or interference scenarios, thus balancing monitoring reduction with allocation flexibility.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent allows modification of grant parameters such as periodicity, time-frequency resources, and transmission power through reconfiguration messages. This enables the system to adapt configured grants to changing service requirements without abandoning the configured grant mechanism entirely, maintaining both the time-saving benefits and necessary flexibility through parameter adjustment rather than complete reallocation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12464531B2User equipment

Publication Date: 2025.11.04 NTT DOCOMO INC

AI summary

A user equipment including: a reception unit that receives configuration information for one or more grants from a base station apparatus; and a transmission unit that, wherein the one or more grants are active, transmits a sidelink signal using a resource specified by the one or more grants.