UE Retry Timer Control for IMS Reconnection Overload

Solution Overview

Problem

Existing IMS network connection retry mechanisms in user equipment (UE) often result in inefficient reconnection attempts due to hard-coded intervals that can prolong connection times and overwhelm the network, especially when the network is unavailable or overloaded.

Innovation Solution

Implementing dynamic connection retry timers based on network conditions, allowing UE to adjust retry intervals dynamically based on failure types and network availability, using stored or updated retry interval data from network nodes or gateway devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hard-coded retry intervals are used, then the UE can attempt reconnection at predetermined intervals, but the connection time is prolonged and the network is overwhelmed

Engineering Contradiction:

Improveconnection reestablishmentVSAvoidconnection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements dynamic retry intervals that adjust based on network conditions rather than using fixed hard-coded values. The UE monitors network availability and modifies retry timing accordingly, shortening intervals when the network is available and lengthening them when unavailable, thereby reducing overall connection time while preventing network overload

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where the UE receives network status information and uses this feedback to adjust retry behavior. By continuously monitoring network conditions and adapting retry intervals based on real-time feedback, the system optimizes connection reestablishment speed without overwhelming the network

Inventive Principle:

Principle #23Feedback

2Reliability

If hard-coded retry intervals are used, then the UE can attempt reconnection at predetermined intervals, but the network is overwhelmed with connection attempts

Engineering Contradiction:

Improveconnection reestablishmentVSAvoidnetwork overload

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic retry intervals that adjust based on network conditions rather than using fixed hard-coded values. The UE monitors network availability and modifies retry timing accordingly, shortening intervals when the network is available and lengthening them when unavailable, thereby reducing overall connection time while preventing network overload

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where the UE receives network status information and uses this feedback to adjust retry behavior. By continuously monitoring network conditions and adapting retry intervals based on real-time feedback, the system optimizes connection reestablishment speed without overwhelming the network

Inventive Principle:

Principle #23Feedback

3Productivity

If predetermined retry intervals are used, then the UE can systematically attempt reconnection, but the intervals are not optimal for every scenario

Engineering Contradiction:

Improvereconnection efficiencyVSAvoidscenario adaptability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic retry intervals that adjust based on network conditions rather than using fixed hard-coded values. The UE monitors network availability and modifies retry timing accordingly, shortening intervals when the network is available and lengthening them when unavailable, thereby reducing overall connection time while preventing network overload

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the retry interval parameter dynamically based on detected network conditions. By adjusting this critical parameter according to the current scenario—using shorter intervals when the network is responsive and longer intervals when it is overloaded—the system achieves both high reconnection efficiency and scenario adaptability

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250380326A1Techniques for improved user equipment retry timer

Publication Date: 2025.12.11 T MOBILE US INC

AI summary

Techniques are described herein for providing intelligent connection retry timing as implemented on user equipment (UE). Such techniques may comprise determining that a first attempt to establish a connection with a network has failed, receiving, from a computing device separate from the UE, a retry interval value associated with the first attempt to establish the connection, performing a wait operation over an amount of time associated with the retry interval value, and performing, at the expiration of the amount of time, a second attempt to establish the connection with the network. In these techniques, the retry interval values to be used may vary based on one or more conditions associated with the failed connection attempt.