RedCap UE Type Indication for Reliable Sidelink Resource Setup

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Solution Overview

Problem

Conventional communication systems fail to provide a mechanism for non-RedCap UEs to identify the type of RedCap UEs, leading to improper configuration of sidelink transmission resources and subsequent communication failures between RedCap and non-RedCap UEs.

Innovation Solution

RedCap UEs are equipped with mechanisms to indicate their type to non-RedCap UEs, allowing proper configuration of sidelink communication parameters and reducing complexity and latency in wireless communication systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional communication systems are used without RedCap UE type indication, then device complexity is reduced, but communication reliability deteriorates due to improper configuration of sidelink transmission resources

Engineering Contradiction:

Improvecommunication reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the RedCap UE send a type indication message before establishing sidelink communication. This allows the non-RedCap UE to pre-configure appropriate transmission resources and parameters based on the indicated UE type, ensuring reliable communication from the outset rather than attempting configuration after connection establishment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The type indication message serves as an intermediary element that bridges the information gap between RedCap and non-RedCap UEs. This intermediate signaling mechanism enables the receiving UE to understand the capabilities of the transmitting UE and appropriately configure resources, resolving the contradiction between maintaining simple device operation and achieving reliable communication.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If RedCap UE type indication is implemented, then communication efficiency is improved, but loss of time increases due to additional signaling overhead

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidsignaling time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The type indication is sent in advance during the initial connection establishment phase, allowing subsequent communication to proceed efficiently without repeated capability negotiations. The additional signaling time is incurred only once at the beginning, after which streamlined communication can occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements a lightweight type indication mechanism that provides just enough information (UE type classification) to enable efficient resource configuration, rather than exchanging complete capability sets. This partial information exchange achieves the necessary communication efficiency improvement with minimal time overhead.

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If RedCap UE type indication is sent, then measurement precision is improved for resource allocation, but loss of information increases due to potential message loss or interference

Engineering Contradiction:

Improveresource allocation precisionVSAvoidinformation loss

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent changes the parameter representation by using a compact type indication field that encodes UE capability information in a standardized format. This allows receiving UEs to accurately interpret the transmitting UE's capabilities with high precision while minimizing the information payload size, thereby reducing vulnerability to message loss or interference.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4292233B1Reduced capability user equipment identification for sidelink communications

Publication Date: 2025.11.26 QUALCOMM INC

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AI summary

Example aspects include an apparatus and method of wireless communication by a reduced capability user equipment (RedCap UE) in a network, comprising sending, to a non-RedCap UE, an indication indicating the RedCap UE as a RedCap UE device. The aspects further include performing sidelink communications with the non-RedCap UE in accordance with capabilities of the RedCap UE.