A low-latency and jitter high-speed signal switching system

Abstract

The invention discloses a low-latency and jitter high-speed signal exchange system, including RapidIO, Gigabit Ethernet, RS485, GPIO, radio frequency connections, etc., and supports higher backplane bandwidth while retaining abundant interfaces. The inter-board exchange provides 8 pairs of transceivers, whose line rate can reach 6.25Gbps, and any board can theoretically provide a data exchange capability of up to 50Gbps. The system architecture adopts a switched structure to replace the main control structure of PXI-e, CPCIe, etc., so that the overall performance of the system is no longer limited by the main control board, and the overall performance of the system is improved. At the same time, under the switching structure, any board can send data at any time without bus arbitration, which reduces the uncertain delay caused by bus requests and bus arbitration processes, and is especially suitable for high-speed, real-time signal transmission requirements .

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a high-speed signal switching system with low delay and jitter. Background technique [0002] The backplane is the physical pathway between the input and output. The traditional backplane adopts the shared backplane structure and uses the master-slave switching mode, and all the carrier boards are controlled by the main control board. The backplane bandwidth marks the total data exchange capability of the switch. The unit is Gbps, also called switching bandwidth. The backplane bandwidth of a general switch ranges from a few Gbps to hundreds of Gbps. The higher the bandwidth of the backplane, the stronger the ability to process data, but at the same time the higher the design cost. [0003] With the increasing communication frequency, the increasing number of communication equipment ports, and the increasing bandwidth of the communication system bus, when testi...

AI Technical Summary

Problems solved by technology

[0004] At present, communication test equipment developed based on PXI, PCIe and other bus technologies are implemented using the main control board loading board, and all carrier boards need to exchange data through the main control board, that is, the above-mentioned types of bus equipment use the main control board as the core switching unit , has the disadvantages of bus speed limited by the main control board, large delay and large jitter

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