Wireless Device Denial of Service Mitigation via Cell Barring
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Solution Overview
Problem
Wireless communication devices often experience denial of service due to misconfigurations, software bugs, or rogue cells/networks/RATs, leading to frequent crashes or loss of cellular service, which can impact user experience and emergency service availability.
Innovation Solution
The device identifies repeated denial of service issues and modifies its operation by disabling specific features, barring problematic cells, networks, or radio access technologies to attempt service on alternative options, using a progressively aggressive approach to minimize operational impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device attempts to obtain service on all available cells, networks, and RATs, then service availability is maximized, but the risk of crashes and denial of service increases due to untested configurations and rogue cells
Solution Approach 1:
The device performs preliminary actions by proactively disabling untested features and barring cells/networks/RATs that have previously caused crashes or service loss. This preventive approach eliminates potential crash sources before they can cause denial of service, allowing the device to safely attempt service on remaining configurations without encountering known problematic states
Solution Approach 2:
The device converts harmful past crash experiences into beneficial knowledge by tracking and remembering which features, cells, networks, or RATs caused previous crashes or service loss. This transformed harm into a protective mechanism that guides future service acquisition by avoiding previously harmful configurations
2Reliability
If the device disables features or bars cells/networks/RATs to avoid crashes, then denial of service is reduced, but the complexity of device operation and configuration management increases
Solution Approach 1:
The device performs self-service by automatically tracking its own crash history, identifying problematic features/cells/networks/RATs, and autonomously disabling or barring them without user intervention. The device serves itself by managing its configuration state based on accumulated operational experience, eliminating the need for external configuration management
Solution Approach 2:
The device implements feedback by continuously monitoring service acquisition attempts and crash events, using this feedback to dynamically adjust its configuration. When a crash occurs, the device feeds this information back into its service acquisition logic to modify future behavior, creating a closed-loop system that automatically improves service reliability based on operational experience
Data Source
AI summary
This disclosure relates to techniques for avoiding denial of service in a wireless communication system. A wireless device may unsuccessfully attempt to obtain cellular service. Based at least in part on cause information for the unsuccessful attempt to obtain cellular service, and potentially also based at least in part on cause information for one or more previous unsuccessful attempts to obtain cellular service, the wireless device may selectively determine to disable one or more features at the wireless device, bar a cell on which the unsuccessful attempt to obtain cellular service is made, bar a public land mobile network on which the unsuccessful attempt to obtain cellular service is made, and/or bar a radio access technology according to which the unsuccessful attempt to obtain cellular service is made and perform a subsequent attempt to obtain cellular service.