5G Activation Control Preventing Premature Deactivation

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Solution Overview

Problem

In the 5G mobile communication system, the loss of a physical downlink control channel (PDCCH) can lead to premature deactivation of cells, carriers, or bandwidth parts (BWP), resulting in delayed uplink transmissions due to incorrect deactivation triggers.

Innovation Solution

An activation control method that involves receiving configuration information from a network device to manage the deactivation of cells, carriers, or BWPs, including setting uplink skip mechanisms and configuring deactivation timers to prevent premature deactivation, ensuring continuous uplink transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the PDCCH scheduling is used to extend Scell deactivation timer, then the deactivation timing can be controlled, but when the PDCCH is lost, the deactivation timer is not extended and the Scell is prematurely deactivated

Engineering Contradiction:

Improvedeactivation timer extension reliabilityVSAvoidPDCCH loss impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple transmission resources and operation attributes for the Scell before PDCCH loss occurs. The UE is provided with configuration information including first transmission resource with first operation attribute and second transmission resource with second operation attribute, enabling the UE to perform deactivation function operations based on pre-established rules rather than relying solely on PDCCH timing extension.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a backup mechanism by providing alternative transmission resources and operation attributes. When PDCCH is lost, the UE can switch to using the pre-configured second transmission resource and second operation attribute, effectively copying the deactivation control function through alternative means to maintain reliability.

Inventive Principle:

Principle #26Copying

2Productivity

If the Scell is deactivated when deactivation timer expires, then resource management is efficient, but uplink transmission of the UE cannot be transmitted and uplink transmission may be delayed

Engineering Contradiction:

Improveresource management efficiencyVSAvoiduplink transmission delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies dynamics by making the deactivation timer extension dynamic based on transmission resource configuration. The UE determines whether to extend the deactivation timer based on whether the first transmission resource is configured and its associated operation attribute, allowing flexible adjustment between resource management efficiency and transmission continuity based on current configuration state.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the deactivation timer parameter dynamically. When the first transmission resource is configured with appropriate operation attribute, the deactivation timer is extended, changing its value from the original expiration time to a later time, thereby preventing premature deactivation and ensuring uplink transmission continuity.

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If grant-free mode is used to reduce signaling interaction procedures, then latency is reduced, but deactivation control reliability may be compromised without PDCCH

Engineering Contradiction:

Improvesignaling interaction latencyVSAvoiddeactivation control reliability

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The patent introduces configuration information as an intermediary that carries transmission resource and operation attribute settings. This intermediary provides the necessary control parameters in advance, enabling the UE to perform deactivation function operations reliably without continuous PDCCH signaling, thus maintaining both low latency and high reliability in grant-free mode.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11973721B2Activation control method, user equipment and network device

Publication Date: 2024.04.30 VIVO MOBILE COMM CO LTD

AI summary

The present disclosure provides an activation control method, a user equipment and a network device. The method includes: receiving configuration information transmitted by a network device, where the configuration information is used to indicate at least one of a transmission resource and an operation attribute; when the transmission resource and/or the operation attribute are configured for a target object, performing a deactivation function operation on the target object. The target object is a cell, a carrier or a bandwidth part (BWP).