Router Output Port Utilization Control
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Solution Overview
Problem
Existing router technologies face challenges in managing packet flow rates to maintain optimal utilization below 99.9% and minimizing buffering, which leads to increased delays in packet transmission, especially in high-traffic networks like those handling streaming media.
Innovation Solution
A system and method that identify and measure output port utilization, allowing for individual control of packet flow rates at the input port to prevent buffering by rejecting or discarding new flows, ensuring utilization remains below 99.9% and reducing delay by maintaining a low queue size, typically less than 400 packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If packet flow rates are controlled to maintain utilization below 99.9%, then packet delay is reduced, but network throughput is limited
Solution Approach 1:
The system performs preliminary actions by measuring output port utilization before packets are buffered, and proactively controlling input port flow rates to prevent utilization from reaching 99.9%. This advance intervention prevents the need for large buffers and reduces packet delay before it occurs.
Solution Approach 2:
The system implements feedback by continuously measuring output port utilization and using this information to dynamically adjust input port flow rates. The utilization measurement feeds back to the flow rate control mechanism, creating a closed-loop system that maintains utilization below the 99.9% threshold while minimizing delay.
2Productivity
If buffering capacity is increased to handle high traffic, then network throughput is improved, but packet delay increases
Solution Approach 1:
The system performs preliminary flow rate control at the input port based on measured output port utilization, preventing traffic from accumulating in buffers. By acting before buffers fill up, the system maintains throughput while avoiding the delay associated with large buffer capacities.
3Loss of time
If output port utilization is maintained below 99.9%, then packet delay is reduced, but buffer capacity requirements increase
Solution Approach 1:
The system performs preliminary flow rate control at the input port based on measured output port utilization, preventing traffic from accumulating in buffers. By acting before buffers fill up, the system maintains low delay while minimizing buffer capacity requirements to just 400 packets or less.
Solution Approach 2:
The system implements feedback by continuously measuring output port utilization and using this information to dynamically adjust input port flow rates. This closed-loop control maintains utilization below the 99.9% threshold while minimizing the buffer capacity needed to handle traffic variations.
Data Source
AI summary
A system, method and computer program product are provided. In use, a plurality of flows associated with packets destined for an output port is identified. A utilization associated with the output port is further measured. Thus, rates of a plurality of the flows destined for the output port may be individually controlled at an input port thereof, based on the utilization to ensure that the utilization remains less than 99.9% and avoid buffering more than 400 packets with a correspondingly low delay.