Terminal eDRX Inactive-State Control for Power-Delay Balance

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Solution Overview

Problem

Existing terminal equipment struggles to balance low power consumption and delay requirements in extended discontinuous reception (eDRX) periods, particularly in inactive states, affecting the efficiency of services like remote gas shutdown services.

Innovation Solution

Implementing a method for terminals to receive first indications about eDRX support from access devices and core networks, allowing terminals to determine and adjust eDRX parameters for optimal power consumption and delay balance in both idle and inactive states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the terminal monitors the paging channel continuously in the inactive state, then the downlink data reception reliability is improved, but the power consumption increases

Engineering Contradiction:

Improvedownlink data reception reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The terminal performs discontinuous reception (DRX) by periodically monitoring the paging channel at specific intervals rather than continuously. The terminal wakes up at predetermined paging occasions to check for downlink data and returns to sleep mode otherwise, achieving a balance between reliability and power consumption through periodic monitoring actions.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The terminal dynamically adjusts its monitoring behavior based on the reception of downlink data. When downlink data is detected, the terminal activates to receive the data; when no data is present, the terminal returns to a low-power dormant state. This dynamic state transition optimizes power consumption while maintaining reliable data reception capability.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If the terminal enters dormant state in eDRX period, then the power consumption is reduced, but the service delay increases

Engineering Contradiction:

Improvepower consumptionVSAvoidservice delay

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The terminal performs preliminary actions by proactively monitoring the paging channel at predetermined paging occasions before actual data transmission occurs. This allows the terminal to detect incoming downlink data early and wake up in time to receive it, reducing service delay while maintaining power savings through the majority of the eDRX period spent in dormant state.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the network indicates downlink data availability through paging messages, and the terminal responds by transitioning from dormant to active state. This feedback loop ensures that the terminal wakes up only when necessary, optimizing the balance between power consumption and service delay based on actual data transmission needs.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12574997B2Terminal control method, information processing method, communication device, and storage medium

Publication Date: 2026.03.10 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A terminal control method includes: receiving a first indication carried in a broadcast message. The first indication at least indicates whether an access device supports an extended discontinuous reception (eDRX) function in an inactive state, and the broadcast message comprises a system information block (SIB).