Small Data Transmission Using Preconfigured Uplink Resources

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in handling small data transmissions, particularly in scenarios where immediate data exchange is required without establishing a full RRC connection, leading to increased latency and resource utilization.

Innovation Solution

Implementing small data transmission (SDT) and early data transmission (EDT) mechanisms that allow for the use of preconfigured uplink resources (PUR) and subsequent small data transmissions (SDT) to facilitate efficient and rapid data exchange without full RRC connection setup, optimizing resource utilization and reducing latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If full RRC connection setup is performed for data transmission, then connection reliability is improved, but transmission latency increases and resource utilization deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidtransmission latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The network pre-configures uplink resources (PUR) and transmission parameters for small data packets before the UE needs to transmit data. When data needs to be sent, the UE can immediately use the pre-configured resources without performing full RRC connection setup, thereby reducing latency while maintaining connection reliability through the pre-established configuration.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If full RRC connection setup is performed for data transmission, then connection reliability is improved, but resource utilization deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidresource utilization

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of performing complete RRC connection setup for every small data transmission, the system uses partial action by leveraging pre-configured resources and parameters. This partial approach (using only the pre-configured portion) is sufficient for small data packets, avoiding the excessive resource consumption of full connection setup while maintaining adequate reliability.

Inventive Principle:

Principle #16Partial or excessive action

3Speed

If preconfigured uplink resources are used for small data transmission, then transmission speed is improved, but device complexity increases

Engineering Contradiction:

Improvetransmission speedVSAvoidmechanism complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The UE is provided with self-service capabilities through pre-configured uplink resources. The device can autonomously transmit small data packets using the pre-configured PUR and parameters without requiring complex real-time negotiation or full RRC connection setup with the network. This self-service approach simplifies the transmission process while maintaining high speed.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12610421B2Small data transmission

Publication Date: 2026.04.21 OFINNO LLC

AI summary

A method may include starting, by a wireless device, a small data transmission, SDT, failure detection timer based on initiating an SDT procedure. The method may also include stopping, by the wireless device, the SDT failure detection timer based on non-SDT data arriving during the SDT procedure. The stopping the SDT failure detection timer may be based on transmitting a radio resource control, RRC, message for the non-SDT data arriving during the SDT procedure.