Uplink Data Transmission in RRC Inactive Without State Transition

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in handling data transmissions from devices in RRC_INACTIVE or RRC_IDLE states, requiring significant signaling and power consumption for occasional large data transmissions, and lack efficient mechanisms for small data transmissions.

Innovation Solution

Implementing methods and systems for data transmission in a power efficient state without state transition, utilizing a random access channel (RACH) process or grant-free transmission, allowing devices to send data without entering a connected state, and configuring devices with power efficient states like RRC_INACTIVE or RRC_IDLE to manage uplink data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a device in RRC_INACTIVE state transmits data by transitioning to RRC_CONNECTED state, then data transmission can be performed, but signaling overhead and power consumption increase considerably

Engineering Contradiction:

Improvedata transmission capabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network pre-configures uplink resources and transmission parameters for the device while it is in RRC_INACTIVE state. This preliminary configuration allows the device to transmit data immediately without transitioning to RRC_CONNECTED state, thereby reducing power consumption while maintaining reliable data transmission capability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the essential data transmission function from the full RRC_CONNECTED state by allowing devices in RRC_INACTIVE state to transmit small data packets using pre-configured resources. This separates the minimal necessary transmission capability from the complete connected state, reducing signaling overhead and power consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a device in RRC_INACTIVE state transitions to RRC_CONNECTED state for small data transmission, then data can be sent, but signaling consumption increases

Engineering Contradiction:

Improvedata transmission capabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Inventive Principle:

Principle #10Preliminary action

3Productivity

If a device frequently transitions between RRC_INACTIVE and RRC_CONNECTED states for periodic data transmission, then data can be transmitted, but power efficiency decreases

Engineering Contradiction:

Improvedata transmission frequencyVSAvoidpower efficiency

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent enables devices to remain in RRC_INACTIVE state and perform periodic data transmissions continuously using pre-configured resources. This eliminates the need for repeated state transitions, maintaining continuous data transmission capability while preserving power efficiency throughout the operation.

Inventive Principle:

Principle #20Continuity of useful action

4Adaptability or versatility

If existing systems support large data transmission from RRC_INACTIVE state, then occasional video transmission is enabled, but small data transmission mechanisms are inefficient

Engineering Contradiction:

Improvedata transmission flexibilityVSAvoidsmall data transmission efficiency

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent applies different transmission mechanisms for different data sizes: pre-configured uplink resources for small data packets and full RRC_CONNECTED state for large data transmissions. This localized optimization ensures that each data transmission scenario uses the most efficient mechanism, improving overall system adaptability and ease of operation.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260089624A1Methods, apparatus and systems for data transmission in a power efficient state

Publication Date: 2026.03.26 ZTE CORP

AI summary

Methods, apparatus and systems for transmitting data in a power efficient sate are disclosed. In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: entering a power efficient state; and transmitting, to a wireless communication node, uplink data while being in the power efficient state.