Mobile Station Audio Prioritization in Weak Signal Video Calls
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Solution Overview
Problem
Conventional video call services in mobile stations experience degraded audio and video quality of service (QoS) due to weak signal environments, leading to video freezing and audio interruptions, which compromise user satisfaction.
Innovation Solution
A method where the receiving mobile station determines a weak signal environment and requests prioritized transmission of audio data, which is repeatedly transmitted by the transmitting mobile station, ensuring continuous audio reproduction by processing and retransmitting audio data in an audio-only mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If audio and video data are transmitted together in a video call, then both audio and video services are provided, but in weak signal environments both audio and video QoS are degraded leading to audio interruptions and video freezing
Solution Approach 1:
The system dynamically switches transmission mode between audio-video simultaneous transmission in good signal conditions and audio-only transmission in weak signal conditions. The base station determines signal strength and adaptively adjusts the transmission strategy, transforming from a static to a dynamic system that responds to environmental changes.
Solution Approach 2:
The transmission parameters are changed based on signal environment: in weak signal environments, the system changes from transmitting both audio and video data to transmitting only audio data, and from single transmission to repeated transmission of audio data, thereby optimizing audio QoS under constrained conditions.
2Reliability
If audio data is repeatedly transmitted to ensure continuous audio reproduction, then audio QoS is improved, but transmission bandwidth and time are consumed
Solution Approach 1:
The transmission parameters are changed based on signal environment: in weak signal environments, the system changes from transmitting both audio and video data to transmitting only audio data, and from single transmission to repeated transmission of audio data, thereby optimizing audio QoS under constrained conditions.
Data Source
AI summary
Improving the audio QoS of a video call service in a weak signal environment is accomplished. To do this, even if data is damaged in a weak signal environment during a video call using a mobile station in the weak signal environment, an audio call is preferentially processed such that a minimum audio QoS can be secured. If a transmitting mobile station enters into a weak signal environment while transmitting audio data and video data together during a video call, the transmitting mobile station transmits only audio data, and in response to this, a receiving mobile station processes the audio data transmitted during a set time interval and continuously reproduces the audio data. Audio interruption can be reduced, thereby securing a minimum audio QoS.