Dual MCS Video Call Connection Stability
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Solution Overview
Problem
Wi-Fi connection drops during video calls due to interference, causing interruptions and a need for reliable communication methods that balance throughput and reliability.
Innovation Solution
The access point device and client device communicate using two Modulation and Coding Scheme (MCS) levels in a Time Division Multiplexing (TDM) manner, with MCS index 7 for high-throughput video calls and MCS index 3 for reliable audio calls, switching to MCS index 6 if video call connections are disrupted to minimize interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a higher MCS level (e.g., MCS index 7) is used for video call packets, then throughput is improved, but reliability deteriorates causing connection drops during interference
Solution Approach 1:
The communication system segments data packets into two categories: video call packets and audio-only packets. Video packets are transmitted using a first MCS level (higher throughput), while audio packets are transmitted using a second MCS level (higher reliability). This segmentation allows each packet type to be optimized independently for its specific requirements.
Solution Approach 2:
Different MCS levels are applied to different types of traffic based on their specific quality requirements. Video data receives higher MCS for better throughput, while audio data receives lower MCS for better reliability. This local quality differentiation ensures that each data type gets the appropriate transmission quality without compromising the other.
2Reliability
If a lower MCS level (e.g., MCS index 3) is used for audio packets, then reliability is improved ensuring continuous communication, but throughput is reduced
Solution Approach 1:
The system applies a conservative, lower MCS level specifically to audio packets rather than all packets. This partial action ensures that audio communication maintains high reliability and continuity, while video packets can utilize higher MCS levels for better throughput when conditions permit.
Solution Approach 2:
Audio communication serves as an intermediary backup channel. When video call packets experience connection drops due to interference, the audio-only packets continue to transmit reliably, providing a fallback communication path that maintains conversation continuity.
3Reliability
If dual MCS levels are used for different packet types, then communication reliability is improved during interference, but device complexity increases
Solution Approach 1:
The communication system is designed to handle multiple MCS levels within a single unified protocol framework. The access point and client devices can dynamically select and switch between different MCS levels based on packet type and channel conditions, making the system multi-functional without requiring separate dedicated systems for each MCS level.
Data Source
AI summary
A method of operating a wireless system including an access point and a client device. The access point receives audio data and video data, transmits the audio data and video data using a first MCS, and transmits the audio data using a second MCS, where a code rate of the first MCS is greater than a code rate of the second MCS. The client device receives the audio data and the video data using the first MCS, receives the audio data using the second MCS, provides a first output that is generated using the audio data and the video data received using the first MCS, detects an interruption in the receiving of the audio data and the video data using the first MCS, and in response to detecting the interruption, provides a second output that is generated using the audio data received using the second MCS.