Terminal Device RACH Resource Reporting for Beam Failure Recovery

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Solution Overview

Problem

In communication systems, especially during beam failure recovery and handover, terminal devices may experience abnormalities when accessing the network via random access channel (RACH) resources, leading to inefficiencies and radio link failures, as existing systems lack awareness of resource-related abnormalities.

Innovation Solution

A method and device where a terminal device stores and reports resource information about abnormal RACH access to a network device, including contention free and contention based RACH resources, SSB/CSI-RS indexes, and measurement results, enabling the network device to adjust RACH resource configurations for improved access efficiency and effectiveness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the terminal device uses RACH resources for beam failure recovery or handover, then the terminal device can establish connection with the network, but the terminal device may encounter beam failure or access abnormality

Engineering Contradiction:

Improveaccess reliabilityVSAvoidbeam failure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The terminal device feeds back resource information about abnormal RACH access to the network device, enabling the network to identify and adjust problematic resources. This feedback mechanism allows the system to learn from access abnormalities and modify future RACH resource allocations to avoid similar failures.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network device adjusts RACH resource configurations based on received feedback information. By changing parameters such as resource allocation, timing, or association with SSB/CSI-RS indexes, the network optimizes the RACH procedure to reduce beam failure and improve access reliability.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the network device provides both contention free RACH resources and contention based RACH resources, then the terminal device has more access options, but the system complexity increases

Engineering Contradiction:

Improveaccess option flexibilityVSAvoidRACH resource configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The terminal device autonomously stores and reports resource information about abnormal accesses. This self-service capability allows the terminal to contribute to network optimization without requiring complex network-side analysis of every access attempt, simplifying the overall system architecture while maintaining flexibility.

Inventive Principle:

Principle #25Self-service

3Reliability

If the terminal device reports resource information about abnormal access, then the network device can address abnormalities, but the signaling overhead increases

Engineering Contradiction:

Improveaccess effectivenessVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The terminal device extracts and reports only the essential resource information related to abnormal accesses, such as RACH resource identifiers and associated SSB/CSI-RS indexes. This selective reporting approach provides the network with sufficient information to address abnormalities while minimizing unnecessary signaling overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11968719B2Method and device for reporting information and method and device for receiving report information

Publication Date: 2024.04.23 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A method and device for reporting information and a method and device for receiving report information are provided. The method for reporting information includes: storing, by a terminal device, resource information of a random access channel (RACH) on which access of the terminal device to a network has abnormality; and reporting, by the terminal device, the resource information to a network device.