Adaptive Cell Re-selection for NB-IoT User Equipment
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Solution Overview
Problem
The NB-IoT network communication system's conventional single re-selection judgment formula fails to account for the diverse nature of user equipment, leading to inefficient utilization of network resources and reduced reliability.
Innovation Solution
User equipment selects a cell re-selection criterion based on its status, determining whether to perform cell re-selection by comparing the serving RSRP value to a re-selection threshold value, thereby optimizing network resource utilization and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single re-selection judgment formula is used for all user equipments in the NB-IoT system, then the device complexity is reduced and ease of operation is improved, but the network resource utilization efficiency deteriorates and reliability is reduced
Solution Approach 1:
The patent segments the cell re-selection judgment into multiple formulas (first re-selection judgment formula and second re-selection judgment formula) that are selectively applied based on user equipment status. This segmentation allows different judgment criteria to be used for different types of user equipment, thereby improving reliability without significantly increasing operational complexity.
Solution Approach 2:
The patent introduces dynamic selection of re-selection formulas based on user equipment status. The system dynamically chooses which formula to apply (first or second) according to the specific status of the user equipment, making the re-selection process adaptive and improving overall system reliability while maintaining ease of operation through automated status-based selection.
2Device complexity
If a single re-selection judgment formula is used for all user equipments, then the device complexity is reduced, but the network resource utilization efficiency deteriorates
Solution Approach 1:
The patent divides the re-selection judgment mechanism into multiple specialized formulas tailored to different user equipment statuses. This segmentation enables more accurate and efficient resource utilization for each equipment type while keeping the overall system manageable through status-based formula selection.
Solution Approach 2:
The patent changes the judgment parameters and thresholds in different formulas to match the specific characteristics of different user equipment statuses. This parameter adaptation optimizes network resource utilization efficiency for each equipment type without requiring complex manual configuration, as the status-based selection automatically applies the appropriate parameters.
Data Source
AI summary
A user equipment and cell re-selection estimation method thereof for use in a NB-IoT communication system are provided. The user equipment selects a cell re-selection criterion according to a user equipment status, and determines whether a serving RSRP value of a serving base station is greater than a re-selection threshold value based on the cell re-selection criterion. The user equipment performs cell re-selection when the serving RSRP value is greater than the re-selection threshold value. The user equipment does not perform the cell re-selection when the serving RSRP value is not greater than the re-selection threshold value.