Video Image Reconnection Control Under Variable Network Load
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Solution Overview
Problem
Existing video image transmission systems face issues with network disruptions due to increased load or user-initiated disconnections, leading to unnecessary re-connection requests that overload the server and fail to adapt re-connection timing based on network conditions.
Innovation Solution
A video image transmission apparatus that determines network load levels to adjust re-connection time, interval, and frequency based on packet loss, estimated bandwidth, or ACK/NAK responses to optimize re-connection attempts and reduce server load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the client continuously sends re-connection requests to the server after disconnection, then the client can attempt to reconnect quickly, but the server load increases due to processing numerous re-connection requests
Solution Approach 1:
The patent applies dynamics by making the re-connection interval variable rather than fixed. The control unit adjusts the re-connection interval based on the number of re-connection requests within a predetermined period - increasing the interval when request frequency is high (reducing server load) and decreasing it when request frequency is low (improving re-connection speed). This dynamic adjustment resolves the contradiction between rapid re-connection and server load management.
2Reliability
If the re-connection period is extended to allow more re-connection attempts, then the client can connect to the server even under high network load, but the time required for successful re-connection increases
Solution Approach 1:
The control unit dynamically adjusts the re-connection interval based on network conditions and request frequency. When network load is high, the interval is extended to allow successful re-connection attempts; when load is low, the interval is shortened to reduce re-connection time. This dynamic adaptation resolves the contradiction between re-connection reliability under various load conditions and the time required for re-connection.
Solution Approach 2:
The system implements feedback by monitoring the number of re-connection requests within a predetermined period and using this information to adjust the re-connection interval. This closed-loop control allows the system to adapt to changing network conditions, extending the re-connection period when necessary for reliability while minimizing time loss when conditions permit faster re-connection.
3Device complexity
If the re-connection interval is fixed at a predetermined value, then the re-connection process is simple to implement, but it cannot adapt to varying network load conditions
Solution Approach 1:
The patent transforms the static, fixed re-connection interval into a dynamic parameter that automatically adjusts based on network conditions and request frequency. The control unit implements this by counting re-connection requests within a predetermined period and modifying the interval accordingly - increasing it when request frequency indicates potential server overload, and decreasing it when conditions favor faster re-connection. This adds adaptability while maintaining relatively simple implementation through basic counting and comparison logic.
Data Source
AI summary
A video image transmission apparatus transmits video image data to an external apparatus via a network, determines a load level on the network during communications with the external apparatus, determines, in a case in which a disconnection of the connection with the transmission destination apparatus has been detected, at least one from among a re-connection time period, a re-connection interval and the number of times that re-connection will be performed, based on the load level at the time of the disconnection; and transmits a re-connection request to the external apparatus based on the at least one.