Multi-Band QoS Control for Seamless Video Transmission
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Solution Overview
Problem
Current video transmission systems using Wi-Fi and WiGig networks face challenges in maintaining high-quality video reproduction due to interference and non-line-of-sight issues, leading to disconnections and inefficiencies in quality of service control.
Innovation Solution
An electronic device that simultaneously uses a main frequency band (like WiGig) and a sub frequency band (like Wi-Fi) to transmit and receive data, with the ability to determine data reception states and adjust transmission accordingly, ensuring continuous video playback by predicting and preventing disconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If WiGig (60GHz) is used for video transmission, then data transmission rate is improved, but reliability deteriorates in non-line-of-sight environments
Solution Approach 1:
The transmitting device predicts NLOS situations before they occur by monitoring signal quality metrics (RSSI, SNR, packet loss rate) and proactively switches to Wi-Fi transmission mode in advance, preventing video disconnection rather than reacting after the link fails
Solution Approach 2:
The receiving device continuously monitors WiGig signal quality and sends feedback information (RSSI, SNR, packet loss rate) to the transmitting device, enabling real-time assessment of link quality and triggering predictive switching when degradation is detected
2Adaptability or versatility
If FST technology is used to switch from WiGig to Wi-Fi, then adaptability is improved, but loss of time occurs due to recognition delay
Solution Approach 1:
The transmitting device performs predictive analysis of NLOS situations using trend monitoring of signal quality metrics and switches to Wi-Fi transmission before the WiGig link actually fails, eliminating the recognition delay inherent in conventional FST technology that only reacts after disconnection occurs
Solution Approach 2:
The system dynamically adjusts transmission mode based on real-time signal quality assessment, transitioning from static FST-triggered switching to adaptive predictive switching that optimizes the timing of mode changes to prevent disconnection while minimizing switching time
3Reliability
If Wi-Fi is used for video transmission, then reliability is improved, but speed deteriorates due to interference
Solution Approach 1:
The system dynamically selects transmission mode based on real-time environmental conditions, using WiGig when LOS is available for high-speed transmission and switching to Wi-Fi when interference or NLOS conditions are detected, optimizing both speed and reliability adaptively
Solution Approach 2:
The system changes the operating frequency band parameter from 60GHz (WiGig) to 2.4/5GHz (Wi-Fi) based on detected channel conditions, allowing transition between high-speed mode and reliable mode to match environmental requirements
4Device complexity
If separate networks are used for Wi-Fi and WiGig, then device complexity is reduced, but productivity deteriorates due to inefficient QoS control
Solution Approach 1:
The transmitting device integrates QoS control for both WiGig and Wi-Fi networks into a unified system, enabling coordinated resource allocation and predictive switching that optimizes video transmission efficiency while maintaining separate physical network infrastructures
Solution Approach 2:
The transmitting device implements a universal QoS control mechanism that manages multiple network types (WiGig and Wi-Fi) through a single control logic, enabling the system to handle different transmission modes with unified resource management and predictive switching algorithms
Data Source
Figure 1~2B
Figure 3
Figure 4A~4B
AI summary
Disclosed is an electronic device performing a video transmission using a multi-wireless network and a controlling method thereof. The electronic device for receiving and reproducing contents includes: a communicator, and a processor to receive, from an external device, a signal including original data of contents through a main frequency band, and receive, from an external device through at least one sub frequency band, a connection state signal including information on original data, and control the communicator to transmit, to the external device through the main frequency band and the at least one sub frequency band, a response signal including information on whether original data is missing, and an amount of received data stored in a buffer.