Staggered I Frame Transmission for Wireless Video Load Balance
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Solution Overview
Problem
Wireless video surveillance networks face saturation due to high network load from multiple high-definition video streams, leading to exceeded load tolerance and inability to meet latency QoS requirements, especially when I frames are transmitted simultaneously.
Innovation Solution
A method and device that stagger the sending times of I frames from stations, allocating initial sending times and service periods to maintain network load balance by ensuring the interval between I frame sending times is not equal to the difference between I frame sending periods, using an access point to manage intra and predictive frame service periods, and adjust these periods based on detected changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple stations transmit high-definition video streams concurrently, then the video surveillance network can meet high-definition requirements, but the network load becomes excessively high and exceeds load tolerance
Solution Approach 1:
The patent implements periodic transmission of I frames by allocating different time resources to different stations. Each station transmits I frames at specific periodic intervals rather than continuously, which distributes the network load over time while ensuring high-definition video quality is maintained through regular I frame updates.
Solution Approach 2:
The patent segments the transmission of I frames by dividing the network into multiple time slots, with each station assigned to specific time slots for I frame transmission. This segmentation prevents simultaneous transmissions that would cause network overload while maintaining video quality through structured periodic updates.
2Productivity
If stations send I frames at the same time or time close to each other, then the transmission efficiency is high, but the network load peak rate excessively exceeds network load tolerance
Solution Approach 1:
The patent uses periodic action by allocating time slots in a cyclic manner to different stations for I frame transmission. This ensures that while each station maintains efficient periodic transmission of its video data, the network load peak is controlled by preventing simultaneous transmissions through the structured time slot allocation pattern.
3Productivity
If the network runs in a saturated state, then the bandwidth utilization is maximized, but the network cannot tolerate large load changes and peak throughput exceeds load tolerance
Solution Approach 1:
The patent applies periodic action by scheduling I frame transmissions at regular intervals with controlled frequency. This maintains high bandwidth utilization through consistent periodic updates while preventing network saturation by ensuring the periodic transmission rate remains within the network's load tolerance capacity.
Solution Approach 2:
The patent implements dynamics by making the I frame transmission parameters adjustable based on network conditions. The periodic transmission intervals and time slot allocations can be dynamically modified to adapt to changing network capacity, maintaining optimal bandwidth utilization while preserving load tolerance through flexible parameter adjustment.
Data Source
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AI summary
Embodiments of the present invention provide a multi-video stream transmission method and a device. An AP sets an initial sending time and a sending period of an I frame of each STA associated with the AP, so that an interval between initial sending time of I frames of any two STAs whose I frame sending time is adjacent is not equal to a difference between I frame sending periods of the any two adjacent STAs, and allocates an I frame service period and a P frame service period to each STA according to the initial sending time and the sending period of the I frame of each STA, where each STA exclusively occupies a channel in the I frame service period and the P frame service period, so that I frame sending time of STAs are staggered, network load balance is achieved, and it is ensured that a latency of each STA meets a QoS requirement.