Mobile Gateway for Videoconferencing QoS Adaptation
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Solution Overview
Problem
Extending videoconferencing capabilities to mobile devices is challenging due to limitations in mobile devices and wireless networks, including technology, device, and user mobility, link bandwidth variations, device capabilities, and economic constraints, which affect the quality of service and bandwidth availability.
Innovation Solution
A mobile gateway is linked to a videoconferencing system to improve network resource utilization, using new messaging protocols and interaction between the videoconferencing system and the mobile gateway to enhance video and audio flows, adapt video feeds, and manage quality of service, enabling mobile devices to experience a premium videoconferencing experience by transcoding, transrating, and adjusting session bearers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If videoconferencing is extended to mobile devices, then accessibility and mobility are improved, but quality of service and bandwidth availability deteriorate due to wireless network limitations
Solution Approach 1:
The patent introduces a mobile gateway as an intermediary component between the mobile device and the videoconferencing system. This gateway performs transcoding, transrating, and adaptation of media streams to bridge the capability gap between mobile wireless networks and fixed videoconferencing systems, thereby maintaining service quality while enabling mobile access
Solution Approach 2:
The system dynamically changes parameters such as video resolution, frame rate, and audio codecs based on available wireless bandwidth and network conditions. The mobile gateway adjusts these parameters in real-time to optimize quality of service within the constraints of the wireless network
2Ease of manufacture
If standard videoconferencing configuration is used on mobile devices, then implementation simplicity is improved, but user experience deteriorates due to mobile environment limitations
Solution Approach 1:
The mobile gateway serves as a mediator that handles complex adaptation tasks transparently. The standard videoconferencing configuration can be used on the mobile device side, while the gateway performs the necessary transcoding and adaptation to deliver a premium user experience, thus maintaining implementation simplicity while improving user experience
3Adaptability or versatility
If wireless networks are used for videoconferencing, then mobility and accessibility are improved, but bandwidth availability and network resources deteriorate
Solution Approach 1:
The system dynamically adjusts media stream parameters including video resolution, bitrate, and frame rate based on available wireless bandwidth. The mobile gateway monitors network conditions and adapts these parameters in real-time to optimize resource utilization while maintaining acceptable video quality
Solution Approach 2:
The system applies selective transcoding and adaptation only where necessary in the media stream processing chain. Not all videoconferencing streams require full adaptation, and the gateway applies processing selectively based on the specific capabilities and requirements of each mobile device and network condition
Data Source
AI summary
In one embodiment, a gateway implements: detecting that a mobile device using a communication session in a mobile network is associated with a mobile videoconferencing application, where the videoconferencing application is capable of sending and receiving media streams; and providing from the mobile network to a videoconferencing system within a fixed network a first set of indicators associated with the communication session, and performing policy control, the policy control including: causing the videoconferencing system within the fixed network to be configured to accommodate communications with the mobile device, causing an adjustment to a session bearer within the mobile network to meet a quality of service requirement of a videoconferencing media stream connected to the mobile device, and causing a media bridge to provide a media stream to accommodate the end point.