NB-IoT Access Control via Dynamic Barring Parameters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current access control methods are inadequate for narrowband Internet-of-Things (NB-IOT) technology due to increased load and interference from user equipment in deep enhanced coverage areas, which traditional methods struggle to manage effectively.
Innovation Solution
Implementing dynamic access control mechanisms where network nodes provide barring parameters to user equipment based on various criteria such as reporting types, coverage areas, radio power thresholds, subscription classes, and recent device actions, allowing for flexible and context-dependent access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional access control methods are used for NB-IOT devices in deep enhanced coverage areas, then access control is provided, but network load and interference increase significantly
Solution Approach 1:
The patent applies local quality by implementing differentiated access control parameters tailored to specific coverage enhancement levels. Devices in deep enhanced coverage areas receive customized barring parameters based on their coverage level, allowing the network to control access quality locally rather than applying uniform restrictions across all devices. This resolves the contradiction by maintaining reliable access control for authorized devices while preventing excessive load from inappropriate access attempts.
Solution Approach 2:
The patent implements dynamic access control by adjusting barring parameters based on real-time network conditions and device characteristics. The network can dynamically modify access control criteria according to current load, interference levels, and device performance, enabling the system to adaptively balance access control effectiveness with network load management in deep coverage scenarios.
2Object-generated harmful factors
If access control criteria are made more restrictive to reduce load, then network interference decreases, but legitimate device access is blocked
Solution Approach 1:
The patent utilizes parameter changes by implementing multiple access control criteria including reference signal received power thresholds, coverage enhancement level indicators, and device-specific parameters. By adjusting these parameters dynamically based on network conditions and device capabilities, the system can selectively allow or block access to optimize the balance between reducing interference and maintaining legitimate device access flexibility.
Solution Approach 2:
The patent applies segmentation by dividing access control into multiple independent criteria that can be evaluated separately. Instead of a single restrictive rule, the system segments access control into power level checks, coverage level assessments, and other independent evaluations, allowing legitimate devices to satisfy multiple criteria and access the network while still imposing restrictions to reduce overall interference.
3Device complexity
If uniform access control is applied to all NB-IOT devices, then implementation is simple, but devices in different coverage areas experience unfair access treatment
Solution Approach 1:
The patent implements universality by creating a multi-functional access control framework that handles multiple coverage enhancement levels and device types through a unified set of parameters. The same access control mechanism can accommodate devices in normal coverage, enhanced coverage, and deep enhanced coverage areas by adjusting parameters rather than requiring separate control systems, thus maintaining implementation simplicity while achieving coverage-area-specific optimization.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method and apparatus may include determining at least one access control criterion for a communication device. Meeting the at least one access control criterion depends on actions of the communication device. The method may also include transmitting the at least one access control criterion to the communication device. The at least one access control criterion enables the communication device to determine whether the communication device is allowed to access a network.