Terminal DRX Cycle Selection for Paging Carrier Optimization

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Solution Overview

Problem

Conventional DRX cycle determination methods for terminal devices in IoT communication networks often result in power waste or fail to meet specific paging requirements, leading to longer latency or overlapping between DRX cycles and paging Common Search Space (CSS) durations, which affects communication efficiency and latency.

Innovation Solution

A method where terminal devices receive DRX information from network devices, determining a target DRX cycle based on a combination of their specific DRX cycle and the minimum DRX cycle associated with the paging carrier, to avoid overlapping and meet diverse communication requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional DRX cycle is used for monitoring frequency resources, then the terminal device can maintain basic communication functionality, but it causes power waste or fails to meet specific paging requirements

Engineering Contradiction:

Improvepaging requirement fulfillmentVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by making the DRX cycle adjustable and adaptive rather than fixed. The terminal device determines a target DRX cycle by combining its specific DRX cycle requirements with the minimum DRX cycle of the paging carrier, allowing the system to dynamically optimize the monitoring cycle based on individual device needs while avoiding power waste from meaningless monitoring.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the DRX cycle parameter from a fixed conventional value to a determined target value based on specific device requirements and network conditions. By calculating the target DRX cycle as a function of both the terminal's specific DRX cycle and the paging carrier's minimum DRX cycle, the system optimizes the monitoring parameter to fulfill paging requirements while reducing unnecessary power consumption.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If a fixed DRX cycle is used, then the system maintains simplicity, but it causes overlapping between DRX cycles and paging Common Search Space durations, affecting communication efficiency

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidDRX cycle determination

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the terminal device determine the target DRX cycle in advance before monitoring begins. By pre-calculating the appropriate DRX cycle based on specific device requirements and network parameters, the system avoids overlapping issues and ensures efficient communication from the start, rather than reacting to problems after they occur.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20240314733A1Method, device and computer readable medium for communication

Publication Date: 2024.09.19 NEC CORP

AI summary

Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. According to embodiments of the present disclosure, a terminal device receives, from a network device, a list of minimum discontinuous reception (DRX) cycles associated with a plurality of paging carriers. The terminal device selects a paging carrier from the plurality of paging carriers. The terminal device determines a DRX cycle based on at least one of a DRX cycle specific to the terminal device and a minimum DRX cycle associated with the paging carrier in the list of minimum DRX cycles.