Cellular IoT Mobility Management for 10-Year Battery Life
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Solution Overview
Problem
Current power-saving techniques for cellular IoT devices, such as DRX and C-UNB, are insufficient to achieve a battery life of 10 years or more due to ongoing mobility management procedures and resource consumption, especially for devices with limited mobility that do not frequently change locations.
Innovation Solution
A new mobility class and operational mode, called Limited Mobility and Network Disconnected Mode (NWDM), are introduced, where devices indicate limited mobility and adapt procedures to reduce unnecessary signaling and resource usage, allowing for pre-allocated resources and periodic data transmissions, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If current power-saving techniques (DRX, C-UNB) are used, then devices can reduce power consumption during idle periods, but mobility management procedures and resource consumption continue to prevent achieving 10 years or more battery life
Solution Approach 1:
The network pre-allocates resources and configures mobility management parameters for devices indicating limited mobility before they actually need to transmit data. This allows devices to skip frequent mobility management procedures and directly use pre-configured resources, significantly reducing power consumption and enabling 10+ year battery life.
Solution Approach 2:
The system dynamically adapts mobility management procedures based on device mobility characteristics. Devices indicating limited mobility receive simplified procedures and pre-allocated resources, while mobile devices receive standard procedures. This dynamic adaptation resolves the contradiction by optimizing power consumption for stationary devices without affecting mobile device performance.
2Reliability
If devices perform frequent mobility management procedures to maintain network connectivity, then network coverage and connectivity are ensured, but power consumption increases preventing 10 year battery life
Solution Approach 1:
The network performs preliminary configuration of mobility management parameters and pre-allocates resources for devices with limited mobility before data transmission begins. This preliminary action ensures connectivity is maintained through pre-configured resources while eliminating the need for frequent power-consuming mobility management procedures.
Solution Approach 2:
The system changes mobility management parameters based on device characteristics. Devices indicating limited mobility receive extended mobility management timers and pre-allocated resources, reducing the frequency of mobility procedures. This parameter change maintains reliable connectivity for stationary devices while dramatically reducing their power consumption.
3Adaptability or versatility
If devices use standard cellular communication procedures, then full network functionality is available, but signaling overhead and resource usage prevent achieving ultra-low power consumption for 10 year battery life
Solution Approach 1:
The network pre-allocates uplink and downlink resources and configures mobility management parameters before devices with limited mobility begin data transmission. This preliminary action reduces signaling overhead during actual data transmission while maintaining full network functionality, enabling ultra-low power consumption for 10+ year battery life.
Solution Approach 2:
The system dynamically adjusts resource allocation and mobility management procedures based on device mobility indicators. Devices with limited mobility receive pre-allocated resources and extended timers, reducing signaling overhead. This dynamic approach maintains full network functionality for all devices while optimizing power consumption for stationary devices to achieve 10 year battery life.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT) or Cellular Internet of Things (CIoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. An operating method of a terminal located within a predetermined area in a wireless environment comprises transmitting, to a base station connected to a network, registration information for registering with the network, wherein the registration information includes information for indicating that the predetermined area is included in a coverage area of the base station, and communicating with the base station based on the registration information.