Multi-PRACH Transmission Patterns for NR Detection and Coverage

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current communication systems lack specifications for multi-PRACH transmissions over multiple RACH occasions in New Radio (NR), leading to suboptimal PRACH detection performance and coverage issues, especially in scenarios requiring heavy uplink traffic and vertical use cases.

Innovation Solution

Implement communication apparatuses and methods that enable multi-PRACH transmissions by configuring a multi-PRACH transmission pattern or receiving control information for multiple PRACH transmissions, allowing for energy and coherent accumulation at the gNB for improved detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If single-PRACH transmission is used, then device complexity is reduced, but PRACH detection performance and coverage deteriorate

Engineering Contradiction:

ImprovePRACH detection performanceVSAvoidmulti-PRACH transmission complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple PRACH transmissions into a unified multi-PRACH transmission framework. The gNB accumulates energy and coherent signals from multiple PRACH occasions (ROs) to improve detection performance. This merging approach transforms separate single-PRACH transmissions into a coordinated multi-PRACH system that achieves better coverage and detection reliability without proportionally increasing device complexity.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If multi-PRACH transmissions over multiple ROs are implemented, then PRACH coverage is enhanced, but device complexity increases

Engineering Contradiction:

ImprovePRACH coverageVSAvoidmulti-PRACH transmission complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by configuring multi-PRACH transmission patterns and SSB-to-RO mappings in advance through control information. The UE is pre-configured with multiple ROs and transmission parameters before actual PRACH transmissions occur. This preliminary configuration enables the UE to perform multiple PRACH transmissions without real-time decision complexity, thereby enhancing coverage while keeping device complexity manageable.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If multiple PRACH transmissions are performed, then detection gain is improved, but energy consumption increases

Engineering Contradiction:

Improvedetection gainVSAvoidUE energy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent implements continuity of useful action by having the gNB continuously accumulate energy and coherent signals from multiple PRACH transmissions across different ROs. While the UE performs discrete transmissions, the gNB maintains continuous accumulation processes, improving detection gain without requiring the UE to maintain continuous high-power transmission. This approach balances detection performance improvement with reasonable energy consumption at the UE side.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS20250351186A1Communication apparatuses and communication methods for multi-prach transmissions

Publication Date: 2025.11.13 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

The present disclosure provides communication apparatuses and communication methods for multi-PRACH transmissions. The communication apparatuses include a communication apparatus comprising: a receiver, which in operation, receives control information relating to a multi-PRACH transmission, and a transmitter, which is operation, transmits a multi-PRACH transmission based on the control information, the multi-PRACH transmission comprising a plurality of PRACH transmissions.