Disaggregated Base Station Handover Failure Release Logic

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Solution Overview

Problem

Existing wireless communication systems face challenges in reducing latency and overhead during serving cell changes, particularly in scenarios involving dual connectivity, leading to longer interruptions and inefficiencies in handover procedures.

Innovation Solution

A method is implemented in a radio access network node to transmit a configuration for a serving cell change to a user equipment, monitor for communication failures, and upon detection, release the configuration to manage the change efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the RAN transmits a configuration for a serving cell change to the UE and waits for activation, then the serving cell change can be performed, but communication failures may occur leading to increased latency and overhead

Engineering Contradiction:

Improveserving cell change reliabilityVSAvoidhandover latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The RAN transmits the configuration for the serving cell change in advance (RRCReconfiguration message with ReconfigurationWithSync) before the actual handover is needed, so that when the UE needs to handover, the configuration is already prepared and can be activated immediately upon receiving the activation command, reducing handover latency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The RAN monitors for communication failures with the UE during the configuration waiting period. When a communication failure is detected, the RAN receives feedback about the failure condition and responds by releasing the prepared configuration, preventing wasted resources and potential errors from using invalid configurations

Inventive Principle:

Principle #23Feedback

2Speed

If the RAN maintains configuration ready for activation, then handover can be executed quickly, but communication resources are occupied during the waiting period

Engineering Contradiction:

Improvehandover execution speedVSAvoidcommunication resource occupation

Core Design Contradiction:

SpeedVSLoss of energy

Solution Approach 1:

The configuration is prepared in advance and stored ready for activation, allowing the UE to immediately apply the configuration when receiving an activation command, thus achieving fast handover execution without reconfiguration delays

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

When a communication failure is detected during the configuration waiting period, the RAN releases (discards) the prepared configuration to free up communication resources. This prevents continuous resource occupation for failed handovers while maintaining the ability to prepare new configurations for successful handovers

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS20260113673A1Managing Communication Failures in a Disaggregated Base Station

Publication Date: 2026.04.23 GOOGLE LLC

AI summary

A node in a RAN transmits (1007) to a user equipment UE in a first cell, a message including a configuration for performing a serving cell change to a second cell subsequent to an activation command: determines (1008), subsequent to the transmitting and while the UE awaits the activation command, a communication failure between the UE and the RAN; and in response to the determining, releases (1011, 1013) the configuration.