Mobile Device Blacklist Mechanism for Data Session Establishment
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Solution Overview
Problem
Mobile devices operating in hybrid CDMA 1x/EVDO mode face inefficiencies due to repeated authentication attempts when EVDO network authentication fails, leading to resource wastage and delayed data session setup, which affects user experience and battery life.
Innovation Solution
Implementing a blacklist mechanism to temporarily avoid networks that have failed authentication attempts, allowing the device to fall back to alternative radio access technologies with different authentication entities for data connection, thereby reducing unnecessary authentication retries and expediting data session establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device repeatedly attempts to authenticate with the EVDO network after authentication failure, then the device maintains persistence in acquiring the preferred network, but network resources are wasted and battery life is depleted
Solution Approach 1:
The patent changes the parameter of authentication attempt behavior by introducing a blacklist mechanism. When authentication fails, the network is added to the blacklist with a predetermined time period, changing the device's behavior from persistent retry to temporary avoidance. This parameter change resolves the contradiction by stopping energy-wasting retries while maintaining reliability through selective network avoidance rather than complete abandonment.
Solution Approach 2:
The patent implements feedback by monitoring authentication results and using this information to control future authentication attempts. The blacklist mechanism provides feedback loops: authentication failure triggers blacklist addition, which then feeds back to prevent further attempts during the time period. This feedback system resolves the contradiction by using past authentication outcomes to intelligently control future energy consumption and network acquisition behavior.
2Reliability
If the mobile device repeatedly attempts to authenticate with the EVDO network, then the device shows determination to use the preferred network, but data session setup on CDMA 1x network is delayed
Solution Approach 1:
The patent changes the time parameter of authentication behavior by introducing a blacklist time period. Instead of continuous retry attempts that delay CDMA 1x setup, the device applies a time-based restriction parameter that prevents EVDO authentication attempts for a predetermined duration. This resolves the contradiction by eliminating time-wasting retries while maintaining network preference through the structured blacklist mechanism.
Solution Approach 2:
The patent applies skipping by allowing the device to bypass the EVDO authentication process entirely when the network is blacklisted. Rather than repeatedly attempting to authenticate and wasting time, the device skips directly to alternative networks like CDMA 1x. This skipping mechanism resolves the contradiction by rushing through the data session setup process on alternative networks while temporarily avoiding the problematic EVDO network.
3Reliability
If the mobile device continues authentication attempts on networks with failed authentication, then the device maintains thoroughness in network acquisition, but network resources are consumed
Solution Approach 1:
The patent changes the authentication attempt parameter from unlimited retries to a time-restricted approach using the blacklist mechanism. When a network is blacklisted, the device parameter changes from attempting authentication to avoiding the network for a predetermined period. This resolves the contradiction by maintaining thoroughness in network acquisition through intelligent selection while eliminating wasteful network resource consumption from repeated failed attempts.
Solution Approach 2:
The patent implements feedback by using authentication failure information to control future network selection and authentication behavior. The blacklist mechanism creates a feedback loop where past authentication outcomes directly influence future behavior. This feedback system resolves the contradiction by making the device's network acquisition thoroughness adaptive - it remains thorough in evaluating available networks but avoids wasting resources on known-failure networks.
4Reliability
If the mobile device attempts to establish data session on the same network after authentication failure, then the device shows consistency in network selection, but user experience deteriorates due to delays
Solution Approach 1:
The patent changes the network selection parameter by introducing a blacklist time period that temporarily overrides consistent selection of the preferred EVDO network. When blacklisted, the device parameter changes from consistently selecting EVDO to temporarily selecting alternative networks. This resolves the contradiction by maintaining user experience through faster data session setup on alternative networks while preserving network selection consistency through the structured blacklist mechanism that can be cleared or expired.
Data Source
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AI summary
A method and system for data session establishment from a mobile device in a multiple networks scenario, the method including, checking whether an identifier for an first network is on a blacklist on the mobile device; if the first network identifier is not on the blacklist, attempting to establish a data connection with the first network; and if the first network identifier is on the blacklist, establishing a data connection with a second network. The method and system for data session establishment include deriving and maintaining the blacklist.