Group Handover Configurations Using DRX for Synchronized UE Transitions

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Solution Overview

Problem

Existing wireless communication systems lack efficient mechanisms for coordinated group handover operations between source and target cells, particularly in scenarios involving multiple user equipment (UEs), leading to potential disruptions and inefficiencies.

Innovation Solution

Implementing group discontinuous reception (DRX) configurations to facilitate synchronized handover operations by transmitting group handover information among a group of UEs or network nodes, enabling coordinated transitions between source and target cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional individual handover mechanisms are used for each UE, then handover control flexibility is maintained, but handover efficiency and coordination among multiple UEs deteriorates

Engineering Contradiction:

Improvehandover efficiencyVSAvoidhandover coordination complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges individual handover operations into a unified group handover mechanism. Multiple UEs are coordinated to perform handover simultaneously from source cell to target cell through a single handover command transmitted by the network node, eliminating the need for separate handover procedures for each UE and thereby improving handover efficiency.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the handover process into distinct phases: group handover decision making, handover command transmission during DRX active period, and coordinated UE execution. This segmentation allows complex coordination to be managed systematically while maintaining simplicity in each phase.

Inventive Principle:

Principle #1Segmentation

2Use of energy by moving object

If DRX is used for UE power saving, then energy consumption is reduced, but reliability of receiving handover information deteriorates

Engineering Contradiction:

ImproveUE power consumptionVSAvoidhandover information reception reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The network node transmits the group handover command during the UE's DRX active period before the UE enters sleep mode. This preliminary action ensures that critical handover information is delivered while the UE is still monitoring the downlink, combining power saving benefits with reliable information reception.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent incorporates feedback mechanisms where UEs acknowledge receipt of handover commands and provide status information to the network node. This feedback loop ensures reliable delivery of handover information while maintaining DRX power saving operation.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12382348B2Group handover configurations

Publication Date: 2025.08.05 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a group discontinuous reception (DRX) configuration. The UE may receive, based on the group DRX configuration, a notification communication indicative of group handover information associated with a group of UEs that includes the UE. The UE may perform, based on the group handover information, a group handover operation between a source cell and a target cell. Numerous other aspects are described.