Random Access Resource Segmentation for eRedCap Type Reporting

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Solution Overview

Problem

Existing LTE and NB-IoT technologies cannot meet the data rate requirements of IoT services such as smart home and industrial sensor measurement, which demand rates of tens to 100 MBs, and the early indication mechanism for RedCap UE is not applicable to eRedCap UE in 5G NR.

Innovation Solution

A random access resource configuration method and apparatus that distinguishes between different types of user terminals (eRedCap, RedCap, and non-Reduced Capability) by configuring exclusive random access resources based on their capabilities, allowing eRedCap UE to report its type effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a unified random access resource is used for all terminal types, then the system complexity is reduced and resource configuration is simplified, but terminal type reporting cannot be achieved for eRedCap UE

Engineering Contradiction:

Improveterminal type reporting capabilityVSAvoidrandom access resource configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The random access resources are segmented into different types (first random access resources for eRedCap UE, second random access resources for other terminals) based on terminal capabilities. This segmentation enables the system to differentiate and report terminal types while maintaining manageable complexity through structured resource allocation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different random access resources are allocated to different terminal types based on their specific capabilities. The first random access resources are specifically configured for eRedCap UE with reduced capabilities, while second resources are for terminals with full capabilities. This local quality approach allows each terminal type to use resources optimized for its characteristics.

Inventive Principle:

Principle #3Local quality

2Power

If NB-IoT and MTC technologies are used for IoT services, then low-rate and high-latency applications are supported, but data rate requirements of tens to 100 MBs cannot be met

Engineering Contradiction:

Improvedata rateVSAvoidservice coverage range

Core Design Contradiction:

PowerVSAdaptability or versatility

Solution Approach 1:

The system dynamically adapts to different terminal capabilities by configuring appropriate random access resources. eRedCap UE with reduced capabilities can access the network using first random access resources, while terminals requiring higher data rates can utilize second random access resources, enabling the system to serve a wide range of services from low-rate to high-rate applications.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The random access resource parameters are changed based on terminal type. eRedCap UE receives configured first random access resources with parameters suitable for reduced capability terminals, while other terminals receive second random access resources with parameters optimized for their capabilities, allowing the system to support diverse data rate requirements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250301504A1Random access resource configuration method, random access method, apparatus, and storage medium

Publication Date: 2025.09.25 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A random access resource configuration method is performed by a first-type terminal. The method includes: receiving a first random access resource configured by a network device for the first-type terminal; wherein the first random access resource is different from a second random access resource for a second-type terminal and a third random access resource for a third-type terminal, and a terminal capability of the second-type terminal and a terminal capability of the third-type terminal are greater than a terminal capability of the first-type terminal.