Radio Link Failure Reporting in Wireless Communication Nodes

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Solution Overview

Problem

The existing Radio Link Failure (RLF) reporting mechanism in wireless communication systems is inefficient due to repetitive information, leading to increased signaling overhead, processing payload, and delayed or missed reports, which hinders network coverage optimization and mobility enhancement.

Innovation Solution

A method that enhances RLF reporting by transmitting a first failure message for radio connection recovery and a second signaling for resource control reestablishment, with conditional triggering of third and fourth signaling messages to optimize information reporting, reducing redundancy and improving timely reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE reports MCG RLF-related information through both MCGFailureInformation message and UEInformationResponse message, then the network can acquire RLF information through multiple channels, but the information becomes repetitive and signaling overhead increases

Engineering Contradiction:

ImproveRLF information reporting reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts and removes repetitive RLF information from the UEInformationResponse message when it has already been reported through MCGFailureInformation message. The network side determines whether to request or accept RLF information based on what has already been reported, eliminating redundant signaling while maintaining reliable information acquisition through the initial MCGFailureInformation report.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If the UE waits for UEInformationRequest message to report RLF-Report, then the reporting follows standardized procedure, but the report may be delayed or missed if the request is not received within 48 hours

Engineering Contradiction:

Improvereporting procedure standardizationVSAvoidRLF reporting delay

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent implements preliminary action by enabling the UE to proactively send MCGFailureInformation message with RLF information immediately when radio link failure occurs, without waiting for the network's UEInformationRequest message. This preliminary reporting ensures timely delivery of RLF information even if the network does not send the request within the 48-hour window, while still maintaining the standardized UEInformationResponse procedure as a backup mechanism.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the UE moves to a different PLMN after MCG RLF, then the UE can continue service, but the RLF-Report will not be triggered and RLF information is lost

Engineering Contradiction:

ImprovePLMN switching capabilityVSAvoidRLF information loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent applies preliminary action by requiring the UE to send MCGFailureInformation message with RLF information immediately upon occurrence, before any PLMN switching occurs. This ensures that RLF information is reported to the network while the UE is still in the original PLMN, preventing information loss that would occur if the UE moved to a different PLMN where the reporting trigger would not be activated.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If the network requests complete RLF information through UEInformationRequest, then the network has comprehensive data for optimization, but the processing payload increases

Engineering Contradiction:

Improvenetwork optimization accuracyVSAvoidprocessing payload

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies partial action by enabling the network to selectively request only the specific RLF information elements needed for particular optimization purposes, rather than always requesting the complete RLF-Report. The network can determine the appropriate level of detail based on current optimization needs, reducing processing payload while maintaining sufficient accuracy for network optimization decisions.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12177919B2Method and device in communication nodes for wireless communication

Publication Date: 2024.12.24 APOGEE NETWORKS LLC

AI summary

Present disclosure provides method and device in communication nodes for wireless communication. The communication node determines that a radio connection failure occurs in a first cell, generates a first failure message; when the first condition set is satisfied, transmits a first signaling; when the first condition set is not satisfied, transmits a second signaling; and receives a third signaling; the first signaling is used for initiating a radio connection recovery performed on the first cell, the first signaling comprises a first failure sub-message; the first failure message comprises the first failure sub-message; the second signaling is used for requesting a radio resource control reestablishment; the first condition set comprises a phrase for determining that the radio connection failure occurs in the first cell; the third signaling is used for updating a radio connection; when the first condition set is satisfied, the first signaling is used for triggering the third signaling.