Dynamic WLAN Tunnel for VoWiFi Power Management
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Solution Overview
Problem
The increasing usage of mobile devices strains cellular networks due to higher bandwidth requirements, and existing technologies face challenges in efficiently utilizing both cellular and untrusted wireless connectivity for real-time communications like voice, video calls, and SMS messaging.
Innovation Solution
A method that enables mobile communication devices to dynamically establish a secure communication tunnel using WLAN or untrusted wireless connectivity, allowing for voice-over-IP (VoIP) or voice-over-WiFi (VoWiFi) services by enabling WLAN radios, connecting to a wireless network access point, and maintaining a secure connection with the cellular network gateway, while periodically reporting connection status to conserve power and reduce network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices maintain constant connection to wireless network access point and actively maintain secure data connection through untrusted public network, then real-time communications (voice, video, SMS) can be conducted, but power consumption increases and network load increases
Solution Approach 1:
The patent implements dynamic connection management where the mobile device alternates between WLAN and cellular connections based on availability and activity state. The device dynamically establishes secure tunnels only when needed for incoming calls and maintains connectivity through periodic keep-alive messages rather than constant active connections, resolving the contradiction between reliable real-time communication and power consumption.
Solution Approach 2:
The system uses periodic keep-alive messages sent at configurable intervals to maintain secure tunnel connections without requiring constant active communication. This periodic action allows the connection to be maintained in a low-power state while still enabling rapid reconnection when real-time communication is needed, addressing both reliability and power consumption concerns.
2Productivity
If mobile devices use WLAN connectivity to carry data for voice calls and video calls, then bandwidth requirements are met, but security risks increase due to untrusted public networks
Solution Approach 1:
The patent introduces a secure tunnel as an intermediary layer between the mobile device and the untrusted WLAN network. This tunnel provides encryption and security protocols, allowing the device to safely utilize high-bandwidth WLAN connectivity for voice and video calls without exposing itself to security risks inherent in public networks.
Solution Approach 2:
The system dynamically changes security parameters including establishing encrypted tunnels, configuring security protocols, and adjusting connection states based on network trust levels. These parameter changes enable the device to adapt security measures to match the bandwidth requirements of real-time communications while mitigating security risks.
3Productivity
If mobile devices establish secure communication tunnel through untrusted network for VoIP/VoWiFi services, then cellular network strain is reduced, but connection establishment complexity increases
Solution Approach 1:
The patent creates a universal connection manager that handles multiple connection types (WLAN and cellular) through a single integrated interface. This multi-functional approach simplifies the user experience while managing the complexity of establishing secure tunnels through untrusted networks, allowing the system to automatically select and manage appropriate connection types without increasing perceived complexity for the user.
Data Source
AI summary
A cellular communications network is configured to support calling over untrusted networks such as the Internet. A cellular communications device is used to place and receive calls through the private, trusted cellular communications network. In addition, the device has a WLAN interface for connection to a wireless network access point such as a Wi-Fi access point, and for communication through the Internet. When conducting a voice or video call, the device establishes a secure communication tunnel with a gateway of the cellular communications network through the Internet and communicates voice and/or video data through the secure communication tunnel. The WLAN interface and secure communication tunnel may be disabled during periods when calls are not being conducted. When a call is placed to the device, a message is sent to the device requesting that the device activate its WLAN interface and/or establish a secure communication tunnel with the gateway.