Preamble Group Selection in Wireless Networks

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Solution Overview

Problem

Existing solutions face challenges in efficiently selecting preamble groups when multiple features are combined, particularly due to conflicting RSRP thresholds and complex condition combinations, leading to uneven preamble utilization and potential communication failures.

Innovation Solution

Introduce a set of conditions applicable to preamble groups rather than specific features, allowing for prioritization and selection of preamble groups based on these conditions and feature combinations, ensuring efficient and reliable communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple features are combined with separate RSRP thresholds for each feature, then feature functionality is improved, but condition complexity and selection difficulty increase

Engineering Contradiction:

Improvefeature combination capabilityVSAvoidcondition complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple RSRP threshold conditions into a single unified threshold for preamble group selection. Instead of evaluating separate RSRP thresholds for each feature (msg3 repetitions, small data transmissions, redcap), the system uses one threshold that applies to the combined feature set, simplifying the selection logic while maintaining support for all features

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal preamble group configuration that can indicate multiple features simultaneously. A single preamble group can serve multiple functions (msg3 repetitions, small data, redcap) based on the UE's capabilities and the configured features, eliminating the need for separate threshold evaluations for each feature

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If separate RSRP thresholds are configured for each feature, then feature selection accuracy is improved, but preamble utilization becomes uneven

Engineering Contradiction:

Improvefeature selection accuracyVSAvoidpreamble utilization balance

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent applies different feature combinations to different preamble groups based on local conditions. Each preamble group is configured with specific features and a single RSRP threshold that is optimized for that group's purpose, allowing precise feature selection while maintaining balanced preamble utilization across groups

Inventive Principle:

Principle #3Local quality

3Measurement precision

If multiple conditions are evaluated for each preamble group, then selection accuracy is improved, but processing time and complexity increase

Engineering Contradiction:

Improvepreamble group selection accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent extracts the RSRP threshold evaluation from multiple separate feature conditions and implements it as a single threshold check per preamble group. This reduces the number of conditional evaluations the UE must perform, decreasing processing time while maintaining selection accuracy through proper preamble group configuration

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4420467B1Radio network node, user equipment and methods performed therein

Publication Date: 2025.03.05 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

Embodiments herein relate to, for example, a method performed by a UE (10) for handling communication in a wireless communications network. The UE determines a firstpreamble from a group of preambles out of one or more groups of preambles, wherein thegroup of preambles is selected based on whether one or more conditions, associated withthe group, are fulfilled or not. The UE transmit a PRACH transmission using thedetermined first preamble.