Lower-Layer Handover Reconfiguration With Selective UE Reset

Solution Overview

Problem

Existing wireless communication systems face increased latency and resource consumption during lower layer mobility due to redundant upper layer reconfigurations when switching between cells supported by the same distributed unit, leading to interruptions and reduced quality of service.

Innovation Solution

A modified reconfiguration procedure for lower layer mobility that includes receiving mobility parameters and reset procedures for higher layers, allowing the UE to skip redundant upper layer reconfigurations by performing different reset procedures based on the serving cell association with the same or different distributed units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the UE performs upper layer reconfiguration for every lower layer handover, then the mobility procedure is simple to implement, but the latency increases and quality of service deteriorates

Engineering Contradiction:

Improvemobility procedure simplicityVSAvoidhandover latency

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent applies local quality by differentiating the reconfiguration behavior based on the specific handover scenario. When the source and target cells are served by the same DU, the UE skips upper layer reconfiguration (faster handover). When cells are served by different DUs, the UE performs upper layer reconfiguration (ensures parameter consistency). This localized differentiation resolves the contradiction by applying the appropriate level of reconfiguration only where necessary.

Inventive Principle:

Principle #3Local quality

2Reliability

If the UE performs redundant upper layer reconfigurations, then the mobility procedure ensures parameter consistency, but resource consumption increases

Engineering Contradiction:

Improveparameter consistencyVSAvoidprocessing resource consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies local quality by differentiating the reconfiguration behavior based on the specific handover scenario. When the source and target cells are served by the same DU, the UE skips upper layer reconfiguration (faster handover). When cells are served by different DUs, the UE performs upper layer reconfiguration (ensures parameter consistency). This localized differentiation resolves the contradiction by applying the appropriate level of reconfiguration only where necessary.

Inventive Principle:

Principle #3Local quality

3Reliability

If the UE performs full reset procedures for every handover, then the mobility procedure ensures complete parameter update, but the signaling throughput decreases

Engineering Contradiction:

Improveparameter update completenessVSAvoidsignaling throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating the reconfiguration behavior based on the specific handover scenario. When the source and target cells are served by the same DU, the UE skips upper layer reconfiguration (faster handover). When cells are served by different DUs, the UE performs upper layer reconfiguration (ensures parameter consistency). This localized differentiation resolves the contradiction by applying the appropriate level of reconfiguration only where necessary.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12587909B2Reconfiguration for lower layer mobility

Publication Date: 2026.03.24 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a first control message indicating a set of mobility parameters associated with a lower layer handover procedure, which may be a layer 1 (L1)/layer 2 (L2) handover procedure. The UE may receive a second control message indicating a first or second reset procedure, which may each indicate a respective set of operating parameters for a higher layer than L1/L2 in the protocol stack. The UE may perform the lower layover handover procedure, which may include switching from a first serving cell to a second serving cell. The UE may perform the first or second reset procedure based on the switching, where the first reset procedure may include maintaining the operating parameters of the second serving cell, and the second reset procedure may include switching the operating parameters of the second serving cell.