Light Connected Mode for 5G IoT Signaling Overhead Reduction
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Solution Overview
Problem
Current mobile communication systems face challenges in reducing signaling overhead during handover and paging procedures, especially with the increasing demand for efficient network operations in 5G communication systems and the integration of IoT technologies, where existing random access procedures are inefficient, particularly for devices in extended coverage modes like NB-IoT and eMTC.
Innovation Solution
The introduction of a light connected mode as a new terminal operation mode, allowing for efficient use of uplink resources in random access procedures, and the implementation of a resume ID mechanism for fast reconnection in extended coverage modes, along with semi-persistent scheduling for V2V communication to adapt to varying message transmission needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional handover and paging procedures are used, then network coverage and connectivity are maintained, but signaling overhead increases
Solution Approach 1:
The patent extracts and separates the essential connectivity maintenance functions from the full handover and paging procedures. The light connected mode selectively maintains only the necessary network connection elements (such as partial RRC context) while releasing others, thereby reducing signaling overhead while preserving core network connectivity functionality.
Solution Approach 2:
The light connected mode implements partial action by maintaining a subset of connection state information rather than the complete connection state. This partial maintenance of RRC context and selective keeping of network resources reduces the signaling required for full handover and paging while sufficient to maintain essential connectivity.
2Loss of time
If random access procedures are used for reconnection, then network access is achieved, but procedure duration increases
Solution Approach 1:
The patent applies preliminary action by pre-maintaining essential connection context and network resources during the light connected mode. When reconnection is needed, the terminal can quickly resume the connection using the preserved context information, avoiding the time-consuming full random access procedure while maintaining network efficiency.
3Use of energy by moving object
If full connection mode is maintained, then communication reliability is ensured, but resource consumption increases
Solution Approach 1:
The patent implements dynamics by creating a flexible connection state that can adapt between full connected mode and light connected mode based on actual communication needs. The terminal dynamically transitions between these states, maintaining full connection only when necessary for reliability, and using light connected mode to reduce energy consumption during periods with lower communication requirements.
Data Source
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AI summary
The present disclosure relates to a communication technology and system for integrating a 5G communication system with IoT technologies to achieve a data rate higher than those of 4G systems. The present disclosure is applicable to intelligent services based on the 5G communication technologies and IoT technologies (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, and security and safety services). The present disclosure proposes a method for supporting a light connected mode as a new terminal operation mode in addition to the idle mode and connected mode to facilitate operations of the terminals and base stations in a mobile communication system.