IAB Node Link Recovery via Stored Context

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing communication technologies face challenges in quickly recovering from link interruptions between relay nodes and serving nodes, resulting in long interruption delays that do not meet service requirements.

Innovation Solution

The proposed solution involves a method where a third transmission node receives and stores context information from first or second transmission nodes, allowing for rapid link recovery based on this information, thereby avoiding lengthy re-establishment flows.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a re-establishment procedure is used to recover from link interruption, then connection reliability is improved, but interruption delay increases significantly

Engineering Contradiction:

Improveconnection recovery reliabilityVSAvoidinterruption delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the source serving node transmit context information to the target serving node before the actual handover or re-establishment is needed. This advance preparation ensures that when link interruption occurs, the target node already has the necessary context information ready, eliminating the need for time-consuming information retrieval during recovery and thus reducing interruption delay while maintaining connection reliability

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If context information is transmitted in advance to target serving node, then interruption delay is reduced, but signaling overhead increases

Engineering Contradiction:

Improveinterruption delayVSAvoidsignaling overhead

Core Design Contradiction:

Loss of timeVSLoss of information

Solution Approach 1:

The patent applies local quality by selectively transmitting context information only to target serving nodes that are likely to be needed for handover or re-establishment, rather than broadcasting to all possible targets. The source serving node transmits context information based on specific handover indications or measurements, ensuring that information is sent only where and when it is actually needed, thus reducing unnecessary signaling overhead while still achieving fast recovery

Inventive Principle:

Principle #3Local quality

3Speed

If context information is stored at target serving node, then handover speed is improved, but memory requirements increase

Engineering Contradiction:

Improvehandover speedVSAvoidstorage memory

Core Design Contradiction:

SpeedVSVolume of stationary object

Solution Approach 1:

The patent applies preliminary action by having target serving nodes store context information in advance of actual handover execution. This allows the handover to be executed rapidly when needed, as all necessary information is already prepared and stored. The context information includes essential data such as bearer configurations and security parameters that are needed immediately during handover completion

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250150905A1Information transmission method and device, and storage medium

Publication Date: 2025.05.08 ZTE CORP

AI summary

Provided are an information transmission method and device, and a storage medium. The method includes: receiving, by User Equipment (UE) or an Integrated Access Backhaul (LAB) node, mobility control information; and after detecting that a radio link failure occurs on the UE or the IAB node, activating, by the UE or the LAB node, a handover procedure.