Service-Based Cell Selection for 5G IoT Terminals
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Solution Overview
Problem
Current 5G communication systems lack a method to distinguish service priorities during cell selection and reselection, as they do not consider service information, leading to inefficient service support and resource allocation.
Innovation Solution
A cell selection and reselection method that identifies and prioritizes service information, allowing terminals to select cells based on supported services, using service-specific reference signals and slices, ensuring that only cells supporting the required services are chosen for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals select cells based on signal strength only (existing LTE method), then cell selection is simple and fast, but service support reliability deteriorates because cells cannot be distinguished by their service capabilities
Solution Approach 1:
The patent applies preliminary action by having terminals identify service information of candidate cells before final cell selection. The terminal receives service information from multiple cells, identifies which cells support the required service, and then performs selection among those qualified cells. This ensures service support reliability is maintained while keeping the selection process organized and manageable.
Solution Approach 2:
The patent applies local quality by differentiating cell selection based on service requirements. Instead of uniform selection criteria for all cells, the terminal applies specific service capability matching to identify which cells have the required service support. This allows the selection process to adapt to different service needs while maintaining overall system efficiency.
2Reliability
If terminals check service information for all candidate cells, then service support accuracy is improved, but time consumption and complexity increase
Solution Approach 1:
The patent reduces time loss by performing service information identification as a preliminary filtering step before full cell selection. The terminal quickly identifies which cells support the required service and then focuses detailed evaluation only on those qualified cells, rather than checking all candidate cells in detail.
Solution Approach 2:
The patent applies segmentation by dividing the cell selection process into distinct phases: first identifying cells with required service support, then performing detailed selection among those cells. This segmentation allows the terminal to handle service matching efficiently as a separate step from the actual selection decision.
3Adaptability or versatility
If the system supports multiple services with different priorities (URLLC, eMBB, mMTC), then service versatility is improved, but the cell selection mechanism becomes more complex requiring service-specific designs
Solution Approach 1:
The patent applies universality by designing a cell selection mechanism that can handle multiple service types (URLLC, eMBB, mMTC) through a unified service information identification approach. The terminal identifies service information and matches it against required services regardless of service type, providing a universal solution that works across different service priorities and requirements without needing completely separate protocols for each service.
Data Source
AI summary
The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transfer rate beyond a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. A communication method of a terminal according to one embodiment of the present invention may comprise the steps of: checking information on at least one service supported by a terminal; selecting a first frequency band in which a cell search is to be performed; receiving a reference signal from at least one cell at the selected first frequency; selecting, as a target cell, a first cell from which the reference signal having the largest strength has been received; and when the target cell supports the at least one service supported by the terminal, accessing the target cell.