Handover System Using Cached Registration Data for Network Transitions
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Solution Overview
Problem
Transitioning calls between unlicensed data networks and cellular networks often results in poor call quality due to inefficiencies in handover processes.
Innovation Solution
Implementing techniques that allow seamless handovers between cellular and unlicensed data networks (such as Wi-Fi) by using cached registration data for authentication and establishing communication pathways quickly, with user preferences and signal strength indicators guiding network transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If cached registration data is used for authentication during handover, then transition time is reduced and handover speed is improved, but authentication security may be compromised
Solution Approach 1:
The system performs authentication in advance by obtaining and caching registration data from the home subscriber server before handover occurs. This preliminary authentication action allows the computing device to skip time-consuming authentication steps during actual handover, reducing transition time while maintaining security through pre-validated credentials
Solution Approach 2:
The patent introduces a gateway as an intermediary component that facilitates secure cached authentication. The gateway receives the cached registration data, validates it against current network conditions, and mediates the authentication process during handover, ensuring both speed and security requirements are met
2Reliability
If seamless handover between networks is implemented, then call quality is improved and service continuity is maintained, but system complexity increases
Solution Approach 1:
The system implements a universal handover framework that can operate across different network types (cellular, Wi-Fi, data networks) using a common architecture. The computing device and network infrastructure are designed to handle multiple network protocols and authentication methods through a unified system, reducing overall complexity despite supporting seamless transitions between diverse networks
Solution Approach 2:
The gateway serves as a mediating component that simplifies the handover process by centralizing control functions. It manages the interaction between different networks, handles cached authentication data, and coordinates the transition process, thereby reducing the complexity burden on individual network systems and devices
3Ease of operation
If user preferences are used to guide network transitions, then ease of operation is improved and user control is enhanced, but transition automation is reduced
Solution Approach 1:
The system implements dynamic handover control that adapts to user preferences while maintaining automated operation. User preferences are stored and retrieved to guide network selection decisions, allowing the system to automatically choose preferred networks when available while still providing user control. The automation level dynamically adjusts based on user configuration, balancing ease of operation with automated efficiency
Data Source
AI summary
A conversation is handed over between an unlicensed data network and a cellular network. Voice conversations and/or video conversations may be seamlessly transitioned between cellular networks and unlicensed data networks (e.g., Wi-Fi), with a small transition time (e.g., less than a couple of seconds). The handover may occur from the unlicensed data network to the cellular network or from the cellular network to the unlicensed data network. During the transition between networks, cached registration data is accessed to speed up the authentication of the computing device switching networks. In some configurations, a user may specify preferences for switching between the unlicensed data and cellular networks. For instance, a user may specify a preference to use Wi-Fi networks before cellular networks or to use cellular networks before using Wi-Fi networks.