M-TRP Beam Failure Recovery via MAC CE Encoding

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Solution Overview

Problem

Current wireless communication systems lack efficient methods for detecting and recovering from beam failures in Multi-Transmission/Reception Point (M-TRP) scenarios, leading to reduced network effectiveness.

Innovation Solution

An apparatus configured with at least one processor and memory, capable of detecting beam failures on multiple transmission/reception points (TRPs) and encoding a beam failure indication into a Media Access Control (MAC) control element, which is then transmitted to a network element for recovery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beam failure detection is implemented in M-TRP scenarios, then beam failure recovery capability is improved, but device complexity increases due to multiple TRP monitoring requirements

Engineering Contradiction:

Improvebeam failure recovery capabilityVSAvoidmultiple TRP monitoring requirements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the beam failure detection process by introducing a specific field in the MAC CE message that separately indicates beam failure status for each TRP. This allows the system to monitor multiple TRPs independently while maintaining a unified recovery mechanism, thereby improving reliability without proportionally increasing complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary indicator field within the MAC CE message structure that acts as a mediator between multiple TRP monitoring functions and the beam failure recovery process. This intermediary element consolidates the status information from multiple TRPs into a single transmittable format, simplifying the overall system architecture.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If beam failure indication data is encoded to MAC CE for transmission, then beam failure information is accurately communicated to the network, but processing time increases

Engineering Contradiction:

Improvebeam failure information accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent prepares the MAC CE message structure and indicator fields in advance, defining the encoding format for beam failure indication data before actual beam failure events occur. This preliminary setup allows for rapid encoding and transmission when beam failures are detected, reducing processing time while maintaining information accuracy.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If multiple TRPs are monitored for beam failure, then network coverage reliability is improved, but the quantity of monitoring data increases

Engineering Contradiction:

Improvenetwork coverage reliabilityVSAvoidmonitoring data volume

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent merges the beam failure status information from multiple TRPs into a single MAC CE message transmission. By combining multiple TRP status indicators into one unified message structure, the system maintains comprehensive monitoring of multiple TRPs while minimizing the quantity of transmitted data, thus improving network coverage reliability without proportionally increasing data volume.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12289625B2M-TRP beam failure indication

Publication Date: 2025.04.29 NOKIA TECHNOLOGIES OY

AI summary

There is provided a method for a user equipment for detecting a beam failure on at least one transmission/reception point, TRP, the UE being configured to communicate with a plurality of TRPs; based on the detecting, encoding a beam failure indication data to a beam failure recovery, BFR, media access control, MAC, control element, CE, wherein the beam failure indication data indicates the beam failure on the at least one TRP; and transmitting the BFR MAC CE to a network element of a wireless communication network.