Group Beam Failure Detection Signal Activation With Single MAC-CE

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in beam failure detection (BFD) due to redundant signaling overhead when activating BFD-RSs for multiple serving cells, leading to increased network traffic latency and resource consumption.

Innovation Solution

Implementing a cell group BFD-RS activation Medium Access Control (MAC) control element (MAC-CE) that activates multiple BFD-RSs for a group of cells, reducing the need for separate communications and signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate communications are used for BFD-RS activation on each serving cell, then each cell can be monitored independently, but signaling overhead increases and network resources are consumed inefficiently

Engineering Contradiction:

Improvebeam failure detection reliabilityVSAvoidnetwork resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent combines BFD-RS activation for multiple serving cells into a single MAC-CE message. Instead of sending separate activation commands for each cell, the network node transmits one unified MAC-CE that contains activation information for multiple cells simultaneously, thereby reducing signaling overhead and improving network resource efficiency while maintaining independent monitoring capability for each cell

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The MAC-CE message is designed to serve multiple functions: it can activate BFD-RS for one or multiple serving cells within a single transmission. This multi-functional approach allows the same signaling mechanism to handle different numbers of cells flexibly, providing universal applicability across various network configurations without requiring separate specialized messages for each cell

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If separate communications are sent for BFD-RS activation on each serving cell, then complete coverage is achieved, but network traffic latency increases

Engineering Contradiction:

Improveactivation coverageVSAvoidnetwork traffic latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Multiple activation commands that would traditionally be sent separately are merged into a single MAC-CE message. This consolidation reduces the total number of transmissions required, thereby decreasing network traffic latency while ensuring that all necessary cells receive their activation commands in one unified operation

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If multiple separate MAC-CEs are used for BFD-RS activation, then each cell receives dedicated activation, but UE power consumption increases

Engineering Contradiction:

Improveactivation accuracyVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The UE receives multiple BFD-RS activation commands in a single MAC-CE message rather than processing multiple separate messages sequentially. This reduces the total number of reception and processing operations the UE must perform, thereby lowering power consumption while maintaining accurate activation of BFD-RS for each required cell

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250350342A1Group level beam failure detection reference signal activation

Publication Date: 2025.11.13 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects. a user equipment (UE) may receive. from a network node. a configuration of a plurality of beam failure detection reference signal (BFD-RS) sets for a group of cells. The UE may receive. from the network node. a cell group BFD-RS activation medium access control (MAC) control clement (MAC-CE) that activates one or more BFD-RSs. of the plurality of BFD-RS sets. for one or more cells in the group of cells. Numerous other aspects are provided.