Multicast Service Transmission DRX Wake-Up Mechanism

Solution Overview

Problem

Current downlink multicast service transmission technologies do not effectively utilize power saving modes, leading to inefficient data reception in user equipment (UEs) as they continuously monitor for multicast data, resulting in increased power consumption and reduced battery life, especially in IoT devices.

Innovation Solution

Implementing a discontinuous reception (DRX) mechanism that allows UEs to wake up only at predefined wake-up times for multicast service sessions, configured by the 5G core or application functions, to receive downlink multicast data, thereby optimizing power saving and reducing unnecessary active mode periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UEs continuously monitor for multicast data, then data reception reliability is improved, but power consumption increases

Engineering Contradiction:

Improvedata reception reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements discontinuous reception (DRX) where UEs periodically wake up at predefined DRX cycle timings to monitor for multicast data instead of continuously monitoring. The network configures DRX parameters including cycle length and wake-up occasions, allowing UEs to enter low-power sleep mode between monitoring intervals while still reliably receiving multicast transmissions when data is available

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The network performs preliminary actions by predicting when multicast data will be transmitted and proactively notifying UEs of upcoming transmission occasions. The network configures DRX parameters in advance and can send wake-up indicators before actual data transmission, allowing UEs to wake up only when needed rather than continuously monitoring

Inventive Principle:

Principle #10Preliminary action

2Loss of time

If UEs wake up frequently to check for multicast data, then data reception timeliness is improved, but battery life reduces

Engineering Contradiction:

Improvedata reception timelinessVSAvoidbattery life

Core Design Contradiction:

Loss of timeVSDuration of action of moving object

Solution Approach 1:

The patent implements discontinuous reception (DRX) where UEs periodically wake up at predefined DRX cycle timings to monitor for multicast data instead of continuously monitoring. The network configures DRX parameters including cycle length and wake-up occasions, allowing UEs to enter low-power sleep mode between monitoring intervals while still reliably receiving multicast transmissions when data is available

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The DRX configuration is dynamic and adaptable. The network can adjust DRX cycle lengths, wake-up occasions, and monitoring durations based on traffic patterns, service requirements, and UE battery status. This dynamic adjustment optimizes the balance between timely data reception and battery conservation for different scenarios

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20240349184A1A downlink multicast service transmission

Publication Date: 2024.10.17 NOKIA TECHNOLOGIES OY

AI summary

There is provided an apparatus comprising means for receiving one or more wake up times, wherein the one or more wake up times correspond to one or more multicast service session times, respectively: means for waking up at the one or more wake up times; and means for starting reception of multicast data and/or means for receiving paging request for multicast data on the one or more wake up times.