User Equipment Network Switching via Call Failure Counters
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Solution Overview
Problem
Carriers adopting the LTE standard face challenges in seamlessly switching between different radio access technologies (RATs) due to issues with voice call connectivity, leading to performance degradations and inefficient network operations.
Innovation Solution
Implementing a method in user equipment (UE) to determine and manage the switching between LTE and legacy RANs using a connection counter and retry mechanisms, along with feedback from lower network layers to initiate actions such as re-establishing TCP connections and resetting registration timers, to optimize RAT switching and maintain network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE remains on LTE network for voice calls, then network capacity and data service performance are improved, but voice call connectivity reliability deteriorates
Solution Approach 1:
The patent implements dynamic network selection by monitoring call connection status and automatically switching between LTE and legacy RAN based on real-time connectivity conditions. The UE dynamically adjusts its network attachment state, transitioning from LTE to legacy RAN when voice call failures are detected, and vice versa when connectivity is restored.
Solution Approach 2:
The patent employs feedback mechanisms where the UE monitors voice call connection status and uses this information to trigger network switching decisions. The system continuously feedbacks connectivity status to the network management logic, enabling adaptive response to changing network conditions and call establishment success rates.
2Reliability
If the UE switches to legacy RAN for voice calls, then voice call connectivity reliability is improved, but network performance and data service quality deteriorate
Solution Approach 1:
The patent implements dynamic network selection by monitoring call connection status and automatically switching between LTE and legacy RAN based on real-time connectivity conditions. The UE dynamically adjusts its network attachment state, transitioning from LTE to legacy RAN when voice call failures are detected, and vice versa when connectivity is restored.
Solution Approach 2:
The patent employs feedback mechanisms where the UE monitors voice call connection status and uses this information to trigger network switching decisions. The system continuously feedbacks connectivity status to the network management logic, enabling adaptive response to changing network conditions and call establishment success rates.
3Reliability
If the UE frequently switches between RATs, then voice call connectivity is maintained, but network operation efficiency and user experience deteriorate
Solution Approach 1:
The patent implements preliminary monitoring of call connection status before triggering network switching. The UE proactively tracks voice call establishment success and maintains a record of connection failures, only initiating RAT switching when predefined thresholds are met, thereby avoiding premature or unnecessary network transitions.
Solution Approach 2:
The patent implements dynamic network selection by monitoring call connection status and automatically switching between LTE and legacy RAN based on real-time connectivity conditions. The UE dynamically adjusts its network attachment state, transitioning from LTE to legacy RAN when voice call failures are detected, and vice versa when connectivity is restored.
Data Source
AI summary
A user equipment (“UE”) connected to a first network that performs methods including receiving a page from the first network indicating an incoming voice call, when it is determined the voice call was not successfully connected, incrementing a value of a counter and when the value satisfies the threshold, switching from the first network to a second network. Another method includes originating a voice call via the first network, when it is determined the voice call was not successfully connected, opening a socket connection with the first network and attempting to re-originate the voice call via the first network. Another method includes determining whether the UE has switched a connection from a first network to a second network and when it is determined that the UE has switched the connection to the second network, initiating an action by the UE.