Mobile Device Home Network Service Restoration
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Solution Overview
Problem
Mobile devices experience prolonged limited-services states when transitioning from a visiting network to a home network, leading to delayed service restoration and inefficient resource usage, as they wait for a limited-services timer to expire or require power cycling.
Innovation Solution
Implementing a method on mobile devices to detect home network availability before the limited-services timer expires, allowing immediate service restoration without power cycling, and adding rejected visiting networks to a block list to prevent repeated connection attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device waits for the limited-services timer to expire before attempting to connect to the home network, then the device avoids repeated connection failures to the visiting network, but the service restoration is delayed and user experience deteriorates
Solution Approach 1:
The patent dynamically adjusts the connection behavior based on network availability detection. When the home network is detected as available before the limited-services timer expires, the device transitions from a restricted state to actively attempting home network connection, thereby reducing service restoration time while maintaining reliability through conditional logic
Solution Approach 2:
The patent implements a feedback mechanism where the mobile device continuously monitors for home network availability and uses this information to modify its connection behavior. The detection of home network availability provides feedback that triggers early service restoration, resolving the contradiction between waiting for timer expiration and immediate reconnection
2Adaptability or versatility
If the mobile device repeatedly attempts to connect to the visiting network that rejected it, then the device may eventually establish connection, but processing resources and network resources are wasted
Solution Approach 1:
The patent performs preliminary detection of home network availability before allowing connection attempts. By checking whether the home network is available in advance, the device prevents futile connection attempts to the visiting network, thereby conserving processing resources and energy while maintaining adaptability through selective connection behavior
Solution Approach 2:
The patent extracts the connection attempt logic from the limited-services state constraints. By separating the home network availability detection from the timer-based restriction, the device can independently evaluate connection opportunities and avoid wasting resources on rejected visiting networks
3Reliability
If the mobile device requires power cycling to restore service after timer expiration, then the limited-services state is reset, but power consumption increases and user convenience decreases
Solution Approach 1:
The patent enables the mobile device to self-restore service by detecting home network availability and automatically attempting reconnection without requiring user-initiated power cycling. This self-service mechanism maintains reliability while significantly reducing power consumption and improving user convenience
Data Source
AI summary
In certain embodiments, a method includes initiating, by a mobile device, an attempt to connect to a visiting network and receiving, by the mobile device in response to the attempt to connect to the visiting network, a rejection from the visiting network. The method includes initiating, by the mobile device in response to the rejection from the visiting network, a limited-services timer to initiate a limited-services state for the mobile device. The mobile device is subscribed to a service on a home network of the mobile device and is prevented in the limited-services state from attempting to access the service. The method further includes detecting, by the mobile device prior to expiration of the limited-services timer, availability of the home network and permitting, by the mobile device prior to expiration of the limited-service timer, the mobile device to attempt to connect to the home network for accessing the service.