Wi-Fi Gateway OUI Screening for Stable Voice Call Routing
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Solution Overview
Problem
Wireless devices connected to wireless gateway devices for VoWiFi often experience insufficient quality of service (QoS) for voice calls due to lack of QoS requirements by wireless providers, leading to poor call quality and susceptibility to latency and congestion.
Innovation Solution
Implementing a database of Organizationally Unique Identifiers (OUIs) for wireless gateway devices lacking voice packet QoS requirements, allowing wireless devices to dynamically switch voice calls to cellular networks instead of relying on VoWiFi by identifying these devices through their OUIs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless devices use VoWiFi for voice calls through wireless gateway devices, then Internet access is enabled, but quality of service for voice calls deteriorates due to lack of QoS requirements
Solution Approach 1:
The system performs preliminary identification of wireless gateway devices by their OUI before voice calls are initiated. The database of OUIs is pre-populated with identifiers of gateways known to lack QoS support, allowing the wireless device to proactively select the appropriate network (cellular or Wi-Fi) before attempting VoWiFi calling, thus avoiding quality issues before they occur.
Solution Approach 2:
The solution segments the network selection process by dividing wireless gateway devices into two categories: those with QoS capability and those without, identified through their OUI. This segmentation allows the system to apply different calling strategies (VoWiFi vs. cellular) based on the specific category of gateway device being used, optimizing voice call quality for each segment.
2Ease of operation
If wireless devices connect to Wi-Fi networks for voice calls, then calling capability is enabled, but susceptibility to latency and congestion increases
Solution Approach 1:
The OUI database acts as an intermediary between the wireless device and the wireless gateway device. By consulting this intermediary database, the wireless device can determine whether the gateway supports QoS and automatically select the appropriate network path (cellular or Wi-Fi) for voice calls, eliminating the need for users to manually configure settings and ensuring stable calls without latency or congestion issues.
3Reliability
If automatic network selection is implemented to improve voice call quality, then call quality improves, but device complexity increases due to database management
Solution Approach 1:
The OUI database serves multiple functions: it identifies wireless gateway devices, determines their QoS capability, and guides network selection decisions. This multi-functionality consolidates what could be a complex system into a single universal database that handles all aspects of network selection, minimizing the increase in device complexity while maintaining high voice call quality.
Data Source
AI summary
Systems and methods are provided for voice call optimization. Methods include receiving a request to initiate a voice call from a wireless device configured to connect to a WLAN of a wireless gateway device. In response to receiving the request, the method includes determining an organizationally unique identifier (OUI) of the wireless gateway device and searching a database containing organizationally unique identifiers (OUIs) for the OUI of the wireless gateway device. The method further includes executing the voice call over a cellular network without using the wireless gateway device upon finding the OUI of the wireless gateway device in the database.