Low Latency Packet Switching via FPGA Intermediary
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Solution Overview
Problem
Conventional switching devices exhibit processing latency that is inadequate for high-frequency trading and other applications requiring low latency data packet processing and routing, such as financial and military applications.
Innovation Solution
Combining a switching device with a programmable data processing device, such as a field programmable gate array (FPGA) or application-specific integrated circuit (ASIC), to perform ultra-low latency data packet processing and routing across multiple OSI model layers, including M×N port mapping and data processing capabilities like filtering, time stamping, and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional switching devices are used for data packet processing, then device simplicity is maintained, but processing latency becomes inadequate for high-frequency trading applications
Solution Approach 1:
The patent combines a switching device with a programmable data processing device (FPGA or ASIC) into a unified system. The switching device handles physical and data link layer processing while the programmable device performs higher layer processing, creating a merged architecture that reduces overall processing latency by optimizing the workflow across both components.
Solution Approach 2:
The system segments data packet processing into different functional components: physical layer switching, data link layer processing, and higher layer processing handled by separate devices. This segmentation allows each component to be optimized independently, with the switching device focusing on low-latency physical switching and the programmable device handling complex processing tasks.
2Adaptability or versatility
If conventional switching devices perform data inspection and processing, then device functionality is maintained, but processing latency increases significantly
Solution Approach 1:
The programmable data processing device acts as an intermediary between the switching device and higher layer processing requirements. It receives packets from the switching device, performs complex data inspection, filtering, and analysis, then forwards processed packets to appropriate destinations, thereby maintaining versatility while managing latency through optimized intermediary processing.
Solution Approach 2:
The system performs preliminary data processing and inspection at the programmable device before packets reach higher layer processing stages. By conducting data validation, filtering, and analysis upfront, the system prepares packets in advance, reducing overall processing time and latency for subsequent operations.
3Adaptability or versatility
If switching devices implement M×N port mapping and multi-layer processing, then routing flexibility is improved, but processing time increases
Solution Approach 1:
The programmable data processing device enables dynamic routing decisions based on real-time packet characteristics and network conditions. The M×N port mapping capability is dynamically configured through programmable logic that adapts routing paths based on current traffic patterns, allowing flexible routing while minimizing processing time through intelligent decision-making rather than static configurations.
Data Source
AI summary
A low latency packet switching system comprising a switching device and a processing device. The switching device may include a first plurality of input/output (I/O) ports and a second plurality of I/O ports, wherein each port of the first plurality of ports may be electrically coupled to a pluggable transceiver socket configured to receive a cable connector. The processing device may include a plurality of transceivers electrically coupled to the second plurality of ports. The switching device may be configured to receive a first electric signal encoding one or more incoming data packets. The switching device may be programmed to output the first electric signal to one or more ports, in accordance with a programmable port mapping scheme. The processing device may be configured to receive the first electric signal and to output a second electric signal encoding one or more modified data packets derived from the incoming data packets.