Dynamic DRX Cycle Adjustment for 5G UE Power and Latency

Solution Overview

Problem

In next-generation mobile communication systems, there is a need for an efficient method to set a long discontinuous reception (DRX) cycle value for user equipment (UE) in a radio resource control (RRC) inactive state, which is essential for optimizing power consumption and data transmission efficiency, especially in scenarios with varying network conditions and user demands.

Innovation Solution

The method involves receiving system information on a first DRX cycle from a base station, requesting and obtaining a second DRX cycle from the access and mobility management function (AMF), and determining the DRX cycle based on the response, allowing for dynamic adjustment of the DRX cycle to balance power savings and data readiness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a long DRX cycle is used in RRC inactive state, then power consumption is reduced, but data transmission responsiveness deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoiddata transmission responsiveness

Core Design Contradiction:

Use of energy by moving objectVSSpeed

Solution Approach 1:

The patent implements dynamic DRX cycle adjustment by allowing the UE to request different DRX cycle values based on its current state and needs. The AMF receives the DRX cycle request message from the UE and responds with an assigned DRX cycle value, enabling the system to adapt the DRX cycle dynamically rather than using a fixed value, thus balancing power savings with responsiveness requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the DRX cycle parameter from a static configuration to a dynamically adjustable parameter. The UE can request different DRX cycle values (e.g., first DRX cycle value from base station, second DRX cycle value from AMF) based on varying network conditions and user demands, allowing the system to optimize the parameter according to actual needs rather than being constrained by a fixed value.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If DRX cycle is fixed, then system complexity is reduced, but adaptability to varying network conditions deteriorates

Engineering Contradiction:

Improvesystem complexityVSAvoidadaptability to network conditions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent enables the UE to autonomously determine its DRX cycle needs and send requests to the AMF based on its current state and requirements. This self-service mechanism allows the UE to actively participate in its own configuration optimization without requiring complex centralized control, thus maintaining relatively simple system architecture while achieving high adaptability to varying network conditions and user demands.

Inventive Principle:

Principle #25Self-service

3Speed

If short DRX cycle is used, then data transmission responsiveness is improved, but power consumption increases

Engineering Contradiction:

Improvedata transmission responsivenessVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic DRX cycle adjustment by allowing the UE to request different DRX cycle values based on its current state and needs. The AMF receives the DRX cycle request message from the UE and responds with an assigned DRX cycle value, enabling the system to adapt the DRX cycle dynamically rather than using a fixed value, thus balancing power savings with responsiveness requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the DRX cycle parameter from a static configuration to a dynamically adjustable parameter. The UE can request different DRX cycle values (e.g., first DRX cycle value from base station, second DRX cycle value from AMF) based on varying network conditions and user demands, allowing the system to optimize the parameter according to actual needs rather than being constrained by a fixed value.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11653409B2Method and apparatus for setting discontinuous reception value in wireless communication system

Publication Date: 2023.05.16 SAMSUNG ELECTRONICS CO LTD

AI summary

A method of operating a terminal in a wireless communication system includes receiving, from a base station, system information including information on a first discontinuous reception (DRX) cycle; transmitting, to an access and mobility management function (AMF), a request message including information on a second DRX cycle based on the first DRX cycle; receiving, from the AMF, a response message about the request message, wherein the response message includes information determined based on whether the AMF assigns the second DRX cycle; and determining a DRX cycle of the terminal based on the response message.