Communication Apparatus Rate Control for Packet Loss Suppression
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Solution Overview
Problem
In communication systems using TCP friendly rate control (TFRC), packet loss occurs when the transmission rate diverges from the calculated possible transmission rate, leading to inefficient data transmission and network congestion.
Innovation Solution
A communication apparatus and method that includes a transmission unit, a physical band measurement unit, and a rate control unit to regulate the transmission rate within a measured physical band, preventing divergence by adjusting the rate based on a predetermined value and coefficients, ensuring the transmission rate remains within or exceeds the physical band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission rate is set to the diverged possible transmission rate calculated by TFRC, then the packet loss rate and RTT become small, but packet loss frequently occurs
Solution Approach 1:
The patent changes the parameter control strategy by introducing a physical band measurement unit that measures the actual network bandwidth, and a rate control unit that adjusts the transmission rate based on both TFRC calculations and physical band measurements. When the calculated possible transmission rate diverges, the system uses the physical band measurement to determine a appropriate transmission rate instead, preventing packet loss while maintaining efficient data transmission.
2Speed
If the transmission rate exceeds the physical band, then data transmission speed increases, but packet loss occurs
Solution Approach 1:
The patent implements a feedback mechanism where the physical band measurement unit continuously monitors the actual network bandwidth, and the rate control unit adjusts the transmission rate based on this feedback. When the transmission rate exceeds the measured physical band, the system reduces the rate to prevent packet loss, creating a closed-loop control system that balances speed and reliability.
3Reliability
If the transmission rate is controlled within the physical band, then packet loss is suppressed, but the transmission rate may be limited
Solution Approach 1:
The patent makes the transmission rate control dynamic by continuously measuring the physical band and adjusting the transmission rate in real-time. The rate control unit dynamically sets the transmission rate within the measured physical band when conditions allow, and permits exceeding the physical band when the network can support it, optimizing both reliability and productivity through adaptive control.
Data Source
AI summary
There is provided a communication apparatus including: a transmission unit which transmits data to an opposite communication apparatus; a physical band measurement unit which measures a physical band against the opposite communication apparatus; and a rate control unit which controls a transmission rate of the transmission unit within a range of the physical band when a previous transmission rate of the transmission unit is below a value of subtracting a predetermined value from the physical band and within a range of exceeding the physical band when the previous transmission rate is beyond the value of subtracting the predetermined value from the physical band.