Dedicated Uplink Resources for Beam Failure Recovery

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Solution Overview

Problem

In 5G mobile communication systems, existing beam failure recovery mechanisms require significant uplink radio resources to be blocked for all potentially available uplink beams, leading to inefficiency and resource overhead, especially when only a subset of beams is relevant for beam failure recovery.

Innovation Solution

The proposed solution allocates dedicated uplink radio resources on a situation-dependent basis, restricting the transmission to a subset of uplink beams that are exclusively or non-exclusively allocated by the base station, reducing resource blockage and allowing flexible reallocation without large signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dedicated uplink radio resources are blocked for all potentially available uplink beams to ensure reliable beam failure recovery, then the reliability of beam failure recovery is improved, but the resource overhead and inefficiency increase

Engineering Contradiction:

Improvebeam failure recovery reliabilityVSAvoiduplink resource overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent segments the set of all potentially available uplink beams into a subset of relevant uplink beams for beam failure recovery. Instead of blocking resources for all beams, the system identifies and restricts resource allocation to only those beams that are actually relevant for recovery, thereby reducing resource overhead while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by differentiating between different uplink beams and allocating resources based on their specific relevance to beam failure recovery. Rather than uniformly blocking resources for all beams, the system selectively allocates resources to specific beams that have local significance for recovery, optimizing resource usage.

Inventive Principle:

Principle #3Local quality

2Reliability

If dedicated uplink radio resources are allocated for beam failure recovery, then the beam failure recovery procedure is enabled, but the flexibility of resource reallocation is reduced

Engineering Contradiction:

Improvebeam failure recovery capabilityVSAvoidresource reallocation flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic resource allocation by allowing the base station to flexibly allocate and reassign dedicated uplink radio resources based on changing situations. The resource allocation is not static but can be adapted to current network conditions, maintaining both recovery capability and flexibility.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies partial action by allocating resources for only a subset of uplink beams rather than all beams. This partial allocation is sufficient to enable beam failure recovery while leaving other resources available for reallocation to other purposes, thus maintaining flexibility.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If dedicated uplink radio resources are allocated for beam failure recovery, then the beam failure recovery signal can be transmitted, but the signaling overhead increases

Engineering Contradiction:

Improvebeam failure recovery signal transmissionVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts and removes the unnecessary portion of resource allocation - specifically, it removes the requirement to allocate resources for all potentially available uplink beams. By taking out only the relevant subset of beams, the system reduces signaling overhead while maintaining the capability to transmit beam failure recovery signals.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20240421883A1Resource allocation for beam failure recovery procedure

Publication Date: 2024.12.19 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

The present disclosure relates to a mobile terminal, a base station, an operating method for a mobile terminal and an operating method for a base station. The mobile terminal is for communicating in a mobile communication system with a base station using at least one of a plurality of downlink beams and at least one of a plurality of uplink beams, each of the downlink and uplink beams having different directivities and/or coverage, comprising: which, in operation, receives for a beam failure recovery, BFR, procedure an allocation of dedicated uplink radio resources for transmitting a beam failure recovery signal, a processor which, in operation, detects a downlink beam failure event and, in response thereto, initiates the beam failure recovery procedure, including the transceiver transmitting the beam failure recovery signal using the dedicated uplink radio resources from the allocation; wherein the dedicated uplink radio resources are restricting the transmission to a subset of the plurality of uplink beams that can be exclusively allocated by the base station to the mobile terminal.