Break-Before-Make Media Handover for Seamless RAT Switching
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Solution Overview
Problem
Existing mobile network technologies disrupt communication sessions when a user switches between different radio access technologies (RATs), such as Wi-Fi to 4G-LTE, leading to interruptions in real-time communication.
Innovation Solution
A 'break-before-make' design is implemented, where the system maintains connection data for a configurable period after detecting a RAT change, allowing applications to re-register with the new RAT and providing user notifications through graphical interfaces or tones, ensuring seamless media handovers between different RATs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user switches between different radio access technologies (RATs), then network connectivity is maintained, but communication sessions are interrupted
Solution Approach 1:
The system performs preliminary actions by establishing a second connection through the target RAT before breaking the first connection. The media handover component initiates the connection switch proactively, allowing the application to re-register with the new RAT before the old connection is terminated, thus preventing communication interruptions
Solution Approach 2:
The media handover component acts as an intermediary between the application and the network connections. It manages the transition by coordinating between the first connection (current RAT), the second connection (target RAT), and the application, ensuring seamless handover without interrupting the communication session
2Reliability
If connection data is maintained after RAT change, then application re-registration is enabled, but computational resources and bandwidth are consumed
Solution Approach 1:
The system dynamically adjusts connection management based on the RAT change state. Connection data is maintained temporarily during the handover period to enable re-registration, then released after the transition is complete. This dynamic approach balances resource consumption with connection reliability during the critical handover window
3Reliability
If a make-before-break design is used, then communication continuity is maintained, but computational resources and bandwidth usage increase
Solution Approach 1:
The patent extracts the complexity of maintaining dual active connections by implementing a streamlined break-before-make approach with proactive initiation. Instead of managing complex simultaneous connections, the system removes the first connection after the second is established, simplifying the overall system architecture while maintaining reliability through the application re-registration mechanism
Data Source
AI summary
A light-weight solution for media handovers between different Radio Access Technologies (RAT) is provided. A user may switch from Wi-Fi to Cellular Data (e.g., LTE/4G/3G/ . . . ), from Cellular data to Wi-Fi, and the like. In contrast to a “make-before-break” design for switching between RATs, the technologies described herein are a “break-before-make” design. When a change in a RAT is detected, an application on the computing device utilizing the connection is notified of the change. Instead of removing connection information, the connection is maintained for a configurable period of time such that the application can re-register with the network to continue the communication session. During a transition to a second RAT, the application provides one or more notifications to the user of the change in RAT. For instance, a graphical user interface (GUI) can be displayed showing the change and/or a tone can be played indicating the change in the RAT.