Mobile IP Registration Retry Logic for Always-On Connectivity
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Solution Overview
Problem
Mobile devices configured as 'Mobile IP only' face registration issues in both home and roaming networks, leading to disruptions in data connectivity, increased battery consumption, and network congestion due to brute force retry attempts, especially when encountering errors such as no registration response, out-of-sync, provisioning, and temporary network errors.
Innovation Solution
Implementing an automatic retry method in wireless devices that categorizes error categories and executes specific steps for each, including returning to initial registration attempts after backoff times, adjusting timestamps, and managing user profiles with retry histories to handle errors like no registration response, out-of-sync, and provisioning issues by sending registration requests with zero lifetime and freeing resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brute force retry attempts are made to re-register with the MIP network, then connectivity reliability is improved, but battery life is reduced and network congestion increases
Solution Approach 1:
The patent segments the retry process by categorizing errors into different types (no response, out-of-sync, provisioning, temporary network errors) and applying different retry strategies to each category. This selective approach avoids unnecessary retry attempts that would consume battery power while still maintaining connectivity reliability for recoverable errors.
Solution Approach 2:
The patent implements periodic retry attempts with backoff time intervals between registration requests. This periodic action allows the device to retry connectivity establishment at scheduled intervals rather than continuously, reducing battery consumption while maintaining the ability to re-establish connectivity when conditions improve.
2Reliability
If brute force retry attempts are made to re-register with the MIP network, then connectivity reliability is improved, but network congestion increases
Solution Approach 1:
The patent segments network retry traffic by applying different retry behaviors to different error categories. For errors like provisioning issues or persistent network problems, the patent reduces or eliminates retry attempts, thereby reducing unnecessary network traffic volume while still maintaining connectivity reliability for transient errors that benefit from retry attempts.
Solution Approach 2:
The patent implements periodic retry attempts with backoff time intervals, which spaces out registration requests over time rather than sending them in bursts. This periodic approach reduces instantaneous network traffic volume and congestion while still achieving connectivity re-establishment over the longer term.
3Reliability
If registration lifetime is extended to maintain continuous connectivity, then connectivity reliability is improved, but resource management efficiency deteriorates
Solution Approach 1:
The patent dynamically adjusts the registration lifetime parameter based on network conditions and error types. Rather than using a fixed extended registration lifetime that would waste resources in all scenarios, the system adapts the lifetime duration to match actual connectivity needs, improving resource management efficiency while maintaining connectivity reliability when extended lifetime is beneficial.
Data Source
AI summary
A system and method for an automatic retry method during initial registration and re-registration of a mobile device on a mobile Internet Protocol (MIP) network is provided. The mobile device is adapted to categorise a registration response (RRP) code and accordingly determine a course of action. By reacting intelligently to the RRP code category, the mobile device is able to maintain a point to point protocol (PPP) connectivity and achieve “always-on” status.