SIB1 BWP Configuration for RedCap UE Initial Access

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing specifications do not clearly describe how to configure multiple initial DL and UL BWPs specific to RedCap UEs, or how the network notifies RedCap UEs of these BWPs.

Innovation Solution

A method and apparatus for a UE to receive and select one initial DL BWP and one initial UL BWP from a plurality of BWPs specifically configured for RedCap UEs, and for a RAN node to transmit such configuration information in SIB1.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple initial DL and UL BWPs are configured for RedCap UEs, then the adaptability and communication efficiency are improved, but the device complexity and specification clarity worsen

Engineering Contradiction:

ImproveBWP configuration adaptabilityVSAvoidconfiguration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the BWP configuration by creating separate initial DL BWP and initial UL BWP configurations specifically for RedCap UEs, distinct from non-RedCap UE configurations. This segmentation allows tailored optimization for RedCap devices with reduced capabilities while maintaining separate configuration management, thus improving adaptability without excessively complicating the overall system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by providing specific BWP configuration parameters (such as bandwidth, subcarrier spacing, cyclic prefix length) that are optimized for RedCap UE characteristics in specific regions of the configuration space. The initial DL BWP and initial UL BWP have locally optimized parameters suited for RedCap capabilities, rather than using generic configurations for all UE types.

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If separate initial DL BWP and initial UL BWP configurations are provided for RedCap UEs, then the manufacturing precision and capability matching are improved, but the loss of information and specification completeness worsen

Engineering Contradiction:

Improvecapability configuration precisionVSAvoidspecification completeness

Core Design Contradiction:

Manufacturing precisionVSLoss of information

Solution Approach 1:

The patent implements preliminary action by pre-configuring appropriate initial DL BWP and initial UL BWP parameters in the network before RedCap UEs attempt connection. The network node determines and configures suitable BWP parameters based on anticipated RedCap UE capabilities, eliminating the need for UEs to independently determine their configuration and ensuring capability-matched settings from the start.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent enables self-service by allowing RedCap UEs to autonomously identify and apply their specific BWP configuration from the provided set of configurations. The UEs use their device type information to select the appropriate initial DL BWP and initial UL BWP configuration without requiring complex network signaling or manual configuration, thus improving precision while maintaining specification completeness.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250386364A1User equipment, radio access network node, and methods therefor

Publication Date: 2025.12.18 NEC CORP

AI summary

A radio access network (RAN) node transmits a System Information Block Type 1 (SIB1) containing configuration information for a plurality of initial downlink (DL) bandwidth parts (BWPs) and a plurality of initial uplink (UL) BWPs specific to a particular type of User Equipment (UE). For example, this may help to provide a specific method of notifying a particular type of UE of a plurality of initial DL BWPs and a plurality of initial UL BWPs specific or dedicated to that particular type of UE.