Risk-Aware System Information Validation for Wireless Access
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Solution Overview
Problem
In LTE wireless communication networks, the inefficiency in controlling access due to the use of invalid system information (SI) leads to latency and potential network misconfigurations, especially when AITs are broadcasted at low update rates, causing issues with access attempts and network resource consumption.
Innovation Solution
Organizing system information into classes based on risk levels and providing validation information to determine the validity of previously acquired SI, allowing devices to decide whether to access the network based on the risk level, thereby minimizing delays and errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If system information is broadcasted at low update rates to save network resources, then network resource consumption is reduced, but the risk of using invalid system information increases
Solution Approach 1:
The patent segments system information into different classes (first class with higher risk, second class with lower risk) and applies different validity assessment strategies to each class. This allows the network to reduce update rates for less critical information while maintaining higher reliability for critical information, thus reducing overall resource consumption while managing risk.
Solution Approach 2:
The patent changes the parameter of update rate differently for different classes of system information. By adjusting the update rate parameter based on risk class, the network can optimize resource consumption while ensuring that critical information is updated frequently enough to maintain reliability.
2Reliability
If devices wait for valid system information before accessing the network, then network access reliability is improved, but access latency increases
Solution Approach 1:
The patent applies different quality requirements (validity assessment strictness) to different classes of system information locally. For the second class with lower risk, devices can access the network with less strict validity checks, reducing latency. For the first class with higher risk, stricter validity checks are applied to ensure reliability.
Solution Approach 2:
The patent allows devices to perform partial validity assessment based on the risk class. For lower risk classes, devices can proceed with access using partially validated information, avoiding the need to wait for complete validation, thus reducing latency while maintaining acceptable reliability.
3Speed
If devices use previously acquired system information for network access, then access speed is improved, but the risk of misconfiguration increases
Solution Approach 1:
The patent applies different risk tolerance levels to different classes of system information. For the second class with lower risk, devices are allowed to use previously acquired information with higher speed, accepting lower misconfiguration risk. For the first class with higher risk, stricter validation is required before use, reducing speed but minimizing harmful effects.
Solution Approach 2:
The patent converts the potential harm of using invalid system information into a benefit by classifying information into risk levels. The lower risk classes can be used more aggressively (faster access) while the higher risk classes are handled more conservatively, thus transforming the risk into a structured approach that enables faster access where safe.
Data Source
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Figure 2
Figure 3A
AI summary
Risk aware validity assessment of system information A radio device (10) acquires system information from the wireless communication network. The system information comprises parameters for controlling access of the radio device (10) to the wireless communication network. The system information is organized in at least two classes differing with respect to a risk level associated with accessing the wireless communication network based on one or more parameters of the class. Further, the radio device (10) receives validation information which enables the radio device (10) to determine, individually for at least one of the classes, validity of the system information as previously acquired by the radio device (10). Depending on the validity and the risk level associated with at least one of the classes, the radio device (10) determines whether to access the wireless communication network based on the system information as previously acquired by the radio device (10).