Configured Grant Override Control in Wireless Terminals

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Solution Overview

Problem

There is a need for controlling the override of configured grants in wireless communications to prevent Quality of Service (QoS) degradation, as existing methods do not effectively manage when a dynamic grant should override a configured grant, leading to potential performance issues due to differing transmission requirements and overlapping radio resources.

Innovation Solution

A method and device for determining whether a dynamic grant should override a configured grant based on overlap in both time and frequency domains, as well as transmission requirements such as received power density, HARQ round trip time, and transmission duration, with configuration information received via RRC signaling or MAC Control Elements to ensure appropriate override conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a dynamic grant is allowed to override a configured grant, then resource utilization flexibility is improved, but QoS degradation may occur due to unnecessary overrides

Engineering Contradiction:

Improveresource utilization flexibilityVSAvoidQoS stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the parameter of override control from unconditional to conditional based on transmission requirements comparison. The terminal device determines whether to override by comparing parameters such as received power density, HARQ round trip time, and transmission duration between the dynamic grant and configured grant, thereby resolving the contradiction between flexibility and reliability.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If override conditions are strictly controlled, then QoS degradation is prevented, but resource utilization efficiency decreases

Engineering Contradiction:

ImproveQoS stabilityVSAvoidresource utilization efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating override behavior based on specific transmission requirements. Instead of uniform override control, the terminal device performs localized comparison of transmission parameters (power density, HARQ RTT, duration) to determine override applicability, thereby maintaining QoS where needed while allowing efficient resource utilization where appropriate.

Inventive Principle:

Principle #3Local quality

3Speed

If a dynamic grant overrides a configured grant with higher transmission requirements, then immediate resource allocation is improved, but transmission performance deteriorates

Engineering Contradiction:

Improveresource allocation speedVSAvoidtransmission performance

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent applies preliminary anti-action by preemptively preventing overrides that would deteriorate transmission performance. Before allowing a dynamic grant to override a configured grant, the terminal device first compares transmission requirements to ensure the dynamic grant does not have lower requirements, thereby preventing performance deterioration before it can occur.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS10904904B2Methods and devices for controlling override of configured grant

Publication Date: 2021.01.26 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The present disclosure provides a method in a terminal device for controlling override of a configured grant associated with a first radio resource. The method includes: receiving from a network device a dynamic grant associated with a second radio resource; and determining whether the dynamic grant is to override the configured grant based on whether the first radio resource and the second radio resource at least partially overlap in both time domain and frequency domain.