Queue Buffer De-queuing Arbitration for Fabric Switch Latency
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Solution Overview
Problem
Fabric switches experience transmission delays due to queuing of packets addressed to the same port, leading to reduced performance as they wait for complete packets before transmission can begin, resulting in increased latency and inefficiency.
Innovation Solution
A queue buffer arbitration system that prioritizes the de-queuing of packets based on completeness, using tail signals to identify complete packets and initiate transmission only when the entire packet is available, thereby reducing the likelihood of waiting for missing packet portions and minimizing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If packets are queued at the output port, then multiple packets can be buffered for transmission, but transmission delays occur reducing fabric switch performance
Solution Approach 1:
The system performs preliminary validation of packet completeness before initiating transmission. The tail signal mechanism pre-checks whether a complete packet is available in the queue buffer before the arbitration process, preventing wasted arbitration cycles and reducing transmission delays by ensuring only complete packets are transmitted.
2Reliability
If the switch waits for complete packets before transmission, then data integrity is maintained, but latency increases
Solution Approach 1:
The queue buffer provides feedback through tail signals to the arbiter, indicating when complete packets are available. This feedback mechanism allows the system to dynamically adjust transmission timing based on actual packet availability, maintaining data integrity while minimizing latency by transmitting complete packets as soon as they are ready.
3Speed
If de-queuing is initiated before complete packet receipt, then transmission speed increases, but incomplete packets are transmitted causing errors
Solution Approach 1:
The system performs preliminary validation of packet completeness before initiating transmission. The tail signal mechanism pre-checks whether a complete packet is available in the queue buffer before the arbitration process, preventing wasted arbitration cycles and reducing transmission delays by ensuring only complete packets are transmitted.
4Reliability
If arbitration waits for tail signals indicating complete packets, then complete packets are transmitted, but de-queuing delays increase
Solution Approach 1:
The queue buffer provides feedback through tail signals to the arbiter, indicating when complete packets are available. This feedback mechanism allows the system to dynamically adjust transmission timing based on actual packet availability, maintaining data integrity while minimizing latency by transmitting complete packets as soon as they are ready.
Data Source
AI summary
A method and apparatus determine which of a plurality of queue buffers (26, 126, 426) contains a complete packet and transmit a de-queue signal to one of the plurality of queue buffers (26, 126, 426) determined to contain a complete packet.