Adaptive 5G Random Access Resource Configuration for Beam Sweeps

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Solution Overview

Problem

The inflexible random access resource configuration in 5G systems due to more flexible frame or slot configurations and different beam sweeping modes leads to resource waste and increased power loss during transmission.

Innovation Solution

A method where a base station generates specific random-access-resource configuration information, including time-frequency resources and preamble formats, to allow flexible configuration of random access resources, adapting to different scenarios and ensuring reception on different beams.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional index-based random access resource configuration method is used, then the configuration is simple and standardized, but it leads to inflexible random access resource configuration and resource waste in 5G systems with flexible frame structures and beam sweeping modes

Engineering Contradiction:
Improverandom access resource configuration flexibilityVSAvoidUE power loss during transmission
Core Design Contradiction:
Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent applies dynamics by making the random access resource configuration adaptive and variable rather than fixed. The base station dynamically determines random access resource configurations based on current system conditions, beam sweeping modes, and frame structures, allowing the configuration to change over time to match operational requirements. This resolves the contradiction by enabling flexible resource allocation that adapts to different scenarios, thereby improving adaptability while avoiding resource waste and reducing UE power consumption through optimized transmission parameters.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent employs parameter changes by modifying key configuration parameters such as preamble formats, system frame numbers, and subframe numbers based on specific beam sweeping modes and frame structures. Instead of using a fixed index-based configuration, the base station adjusts these parameters dynamically to optimize random access resource allocation. This allows the system to adapt to different beam sweeping scenarios and frame structures, improving versatility while reducing resource waste and energy loss by transmitting only when and where necessary.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If more concentrated random access resources are configured for beam-based transmission, then the base station can receive random signals on different beams, but it results in waste of configured random access resources and increased power loss of UE

Engineering Contradiction:
Improvesignal reception reliability on different beamsVSAvoidUE power loss during transmission
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies local quality by allocating random access resources specifically tailored to each beam's requirements rather than using a uniform concentrated configuration across all beams. The base station determines appropriate random access resource configurations for different beams based on local conditions such as beam direction, coverage area, and interference characteristics. This enables reliable signal reception on each beam while avoiding the energy waste associated with overly concentrated resource allocation, as resources are distributed optimally according to local needs.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent uses partial action by configuring random access resources only where and when they are needed for specific beams, rather than allocating concentrated resources to all beams uniformly. The base station selectively activates random access resources for beams that require them based on current operational conditions, avoiding unnecessary resource allocation and associated energy consumption. This partial allocation approach maintains signal reception reliability for active beams while reducing overall UE power loss by minimizing redundant resource configurations.

Inventive Principle:
Principle #16Partial or excessive action

3Ease of manufacture

If index-based random access resource configuration is used, then the configuration method is simple and standardized, but it cannot adapt flexibly to different frame structures and beam sweeping modes in 5G systems

Engineering Contradiction:
Improveconfiguration method simplicityVSAvoidconfiguration flexibility for different frame structures
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent transforms the static index-based configuration into a dynamic determination process. Instead of relying on fixed indices that map to predetermined configurations, the base station dynamically determines random access resource configurations based on current frame structures and beam sweeping modes. This dynamic approach maintains operational simplicity through automated determination while achieving the flexibility needed to adapt to different 5G frame structures and beam sweeping scenarios, resolving the contradiction between simplicity and adaptability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies universality by creating a configuration determination mechanism that can handle multiple frame structures and beam sweeping modes through a unified approach. The base station uses a universal determination process that adapts to different scenarios by selecting appropriate parameters based on the specific conditions. This universal method maintains simplicity in the overall configuration process while providing the versatility to support various frame structures and beam sweeping modes, eliminating the need for multiple specialized configuration methods.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP3672349B1Random access method, terminal, and base station
Publication Date: 2025.10.22 VIVO MOBILE COMM CO LTD
  • EP3672349B1 patent drawingFigure 1~2
  • EP3672349B1 patent drawingFigure 3~4
  • EP3672349B1 patent drawingFigure 5

AI summary

A random access method, UE, and a base station are provided. A random access method applied to a base station includes: configuring random-access-resource configuration information, where the random-access-resource configuration information at least includes time-frequency resources available for transmitting a random access signal and a preamble format of the random access resource; transmitting the random-access-resource configuration information to UE.