Dynamic Coverage Class Management for Cellular IoT Mobility
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Solution Overview
Problem
Current Cellular IoT (CIoT) technology faces challenges in meeting user demands for extended terminal lifetimes, long-distance services, and high numbers of connections, particularly in smart city and smart factory applications, due to power consumption and resource management inefficiencies.
Innovation Solution
The method involves dynamically updating and managing coverage classes in a communication system by assessing mobility and pathloss values, allocating resources based on mobility modes, and subdividing coverage classes to optimize resource usage and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coverage classes are updated frequently to support mobility, then service continuity is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the coverage class update mechanism adaptive rather than static. The terminal determines whether to update coverage class based on mobility state detection, and the network configures different update behaviors for mobility and non-mobility modes. This dynamic adjustment resolves the contradiction by enabling frequent updates only when necessary (mobility mode) while reducing updates when terminal is stationary (non-mobility mode), thus maintaining service continuity while optimizing power consumption.
Solution Approach 2:
The patent changes the parameter of coverage class update frequency based on mobility state. When mobility is detected, the system allows more frequent coverage class updates to maintain service continuity. When no mobility is detected, the system reduces update frequency to save power. This parameter change approach directly resolves the technical contradiction by adjusting the update behavior according to actual terminal conditions.
2Use of energy by moving object
If resource allocation is optimized for static terminals, then power efficiency is improved, but mobility support deteriorates
Solution Approach 1:
The patent makes resource allocation dynamic by configuring different coverage class update behaviors based on mobility state. For non-mobility mode, the system configures restricted update behavior that optimizes power efficiency by preventing unnecessary updates. For mobility mode, the system allows normal update behavior to maintain adaptability and service continuity. This dynamic resource allocation resolves the contradiction by providing optimized resources for static terminals while maintaining mobility support capability.
Solution Approach 2:
The terminal autonomously determines its mobility state and selects appropriate coverage class update behavior accordingly. The network provides configuration information, but the terminal self-determines whether it is in mobility or non-mobility mode and applies the appropriate resource allocation strategy. This self-service mechanism enables power-efficient operation for static terminals while maintaining the ability to adapt when mobility is detected.
3Use of energy by moving object
If coverage class update is restricted for non-mobility mode, then power consumption is reduced, but service adaptability deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the system to switch between restricted and normal coverage class update behaviors based on mobility state detection. When terminal is stationary, restricted behavior reduces power consumption. When mobility is detected, normal behavior restores full service adaptability. This dynamic switching resolves the contradiction by applying resource restrictions only when safe to do so (non-mobility) while maintaining adaptability when needed (mobility).
Solution Approach 2:
The system uses feedback from mobility state detection to control coverage class update behavior. The terminal continuously monitors its mobility state and provides feedback to determine whether to apply restricted or normal update behavior. This feedback mechanism ensures that power consumption is reduced only when the terminal is truly stationary, while service adaptability is maintained when mobility conditions arise.
4Reliability
If mobility mode is activated, then service continuity is maintained, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent makes resource allocation dynamic by configuring different update behaviors based on mobility state. In mobility mode, the system allows frequent coverage class updates to maintain service continuity, accepting reduced resource efficiency as necessary. In non-mobility mode, the system restricts updates to improve resource efficiency. This dynamic approach resolves the contradiction by allowing resource inefficiency only when necessary for maintaining service continuity during mobility.
Data Source
AI summary
An apparatus and a method for transmitting and receiving a signal based on a mobility coverage class are provided. The method includes the operations of receiving, from a base station, information for estimating mobility and information for determining whether to return to a first mode, determining whether the terminal has mobility based on the information for estimating mobility, entering a second mode in which a predetermined coverage class is switched to the mobility coverage class when it is determined that the terminal has mobility, transmitting, to the base station, a second mode indicator indicating entry into the second mode, selecting one of coverage classes of the base station as the mobility coverage class, and transmitting and receiving a signal using a resource allocated to the selected mobility coverage class.