Communication Device Transmission Rate Coordination
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Solution Overview
Problem
In self-distributed communication systems using IP networks and wireless ad hoc networks without a central management device, resource contention between transmission devices leads to unfair band assignment and uneven reception quality, as each transmission device adjusts its rate independently without considering the status of other devices sharing the same relay devices, resulting in congestion and instability.
Innovation Solution
A communication device that determines transmission rates by considering the status of not only its own camera device but also other camera devices sharing the data transmission path, using cooperative operations and status information from relay devices to achieve fair band assignment and equalized reception quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each transmission device independently adjusts its transmission rate based on its own reception status, then the transmission device can respond quickly to its own network conditions, but resource contention occurs between multiple transmission devices sharing the same relay devices, leading to unfair band assignment and congestion
Solution Approach 1:
The patent merges the transmission rate control decisions of multiple transmission devices by introducing a coordination mechanism where devices share their intended transmission rates and relay device statuses. This allows the system to collectively adjust rates based on shared path conditions, preventing resource contention and ensuring fair band assignment while maintaining adaptability to network changes.
2Productivity
If transmission rate is increased to improve productivity, then data transmission efficiency improves, but relay device congestion worsens due to backlog exceeding tolerance
Solution Approach 1:
The patent implements feedback mechanisms where transmission devices periodically query relay devices for their current status (backlog levels, transmission rates of other devices) and adjust their own transmission rates accordingly. This feedback loop allows the system to dynamically balance productivity and congestion, increasing transmission rates when relay devices have capacity and reducing them when congestion is detected.
3Adaptability or versatility
If probe packets are sent frequently to gather relay device status information, then adaptability to network conditions improves, but network overhead increases
Solution Approach 1:
The patent applies partial action by having transmission devices send probe packets at optimized intervals rather than continuously, gathering sufficient status information from relay devices without excessive frequency. The system sends probe packets only when necessary to detect significant changes in network conditions, balancing adaptability with reduced network overhead compared to continuous monitoring.
Data Source
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AI summary
A transmission device includes: a relay device information obtaining unit (101) which obtains self-device transmission status information that is information indicating a transmission status of a communication device; a neighboring communication device determining unit (102) which determines, from other communication devices connected to the network, neighboring communication devices; a neighboring communication device information obtaining unit (103) which obtains another-device transmission status information from each of the neighboring communication devices; a transmission rate control information correcting unit (104) which generates corrected transmission status information based on an amount of statistics calculated from the self-device transmission status information and the another-device transmission status information; a transmission rate determining unit (105) which determines a transmission rate of data, based on the corrected transmission status information; and a data transmission unit (106) which transmits the data according to the determined transmission rate.